Thermo Scientific Revco®

Laboratory 

Refrigerators

Installation and Operation

34830H61 Rev. G October 2017

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IMPORTANT Read this instruction manual. Failure to follow the instructions in this manual can result 

in damage to the unit, injury to operating personnel, and poor equipment performance.

CAUTION All internal adjustments and maintenance must be performed by qualified service personnel.

Material in this manual is for informational purposes only. The contents and the product it describes are 

subject to change without notice. Thermo Fisher Scientific makes no representations or warranties with 

respect to this manual. In no event shall Thermo be held liable for any damages, direct or incidental, 

arising from or related to the use of this manual.

© 2017 Thermo Fisher Scientific Inc. All rights reserved.
Table of Contents

Table of Contents

Introduction..............................................................................1

Safety Precautions....................................................................2

Pre-Installation.........................................................................3

Unpacking ............................................................................ 3

Installation................................................................................4

Location ............................................................................... 4

Wiring .................................................................................. 4

Leveling ...............................................................................5

Door Seal ..............................................................................5

Door Operation ....................................................................5

Final Checks......................................................................... 7

Shelves and Wire Baskets (Drawers) Slides ..........................8

Control Panel............................................................................9

Control Panel Features .........................................................9

Display Functions ..............................................................11

Alarm Setpoints ..................................................................11

Service Mode Parameters................................................... 12

Operation................................................................................13

Start Up .............................................................................. 13

Product Loading Guidelines ...............................................13

Automatic Defrost ..............................................................14

Temperature Setpoint Control ............................................14

Interior Light Switch (Glass Door Units Only) .................14

Convenience Outlet (Chromatography 

Refrigerators Only) .............................................................14

Alarm Systems........................................................................16

Operating the Alarm ...........................................................16

Local and Remote Alarms ..................................................16

Installing a Remote Alarm (Optional) ............................... 17

Alarm Test ..........................................................................17

Chart Recorders.....................................................................19

Set Up and Operation .........................................................19

Power Supply .....................................................................20

Changing Chart Paper ........................................................ 20

Calibration Adjustment ......................................................21

Maintenance ...........................................................................22

Cleaning the Wire Baskets (Drawers) and 

Cabinet Interior ...................................................................22

Removing the Wire Baskets (Drawers) ............................. 22
Table of Contents

Reinstalling the Wire Baskets (Drawers)........................... 23

Cleaning the Condenser .....................................................23

Troubleshooting .....................................................................25

Accessories..............................................................................26

Warranty ................................................................................29
Introduction

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 1

1 Introduction Thermo Scientific (Revco) Laboratory Refrigerators described in this 

manual are sample storage devices, designed for storage of samples between 

1°C and 8°C.

The devices are not intended to store flammable inventory, nor for use in a 

patient environment, or in a hazardous environment. Not intended for use 

as a medical device under FDA classification. Not intended for use as a 

medical device as classified by the Medical Device Directive 2007/47/EC.

This manual provides installation and operation instructions for laboratory 

refrigerators, including general purpose, pharmacy, and chromatography 

models.

The control system, standard on all models, includes:

• Key-operated power and alarm switch

• Preset temperature setpoint (+4°C or 5°C)

• Digital temperature display with 0.1°C resolution

• Graphic temperature display

• Audible and visual power failure indicators

• Alarm silence, ringback, and automatic reset functions

• Pushbutton alarm test

Other standard features include:

• Keyed door locks

• Remote alarm contacts

• CFC-free refrigerant

• CFC-free foamed in-place urethane insulation

• Quiet, hermetically sealed refrigeration compressors

Seven day chart recorders are available as optional accessories on all models. 

For descriptions of other options and accessories, refer to Section 12.
Safety Precautions

2 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

2 Safety Precautions In this manual and on labels attached to this product, the words 

WARNING and CAUTION mean the following:

WARNING: A potentially hazardous situation which, if not avoided, could 

result in serious injury or death.

CAUTION: A potentially hazardous situation which, if not avoided, may 

result in minor or moderate injury or damage to the equipment.

Before installing, using or maintaining this product, be sure to read this 

manual and product warning labels carefully. Failure to follow these 

instructions may cause this product to malfunction, which could result in 

injury or damage.

The following important safety precautions apply to this product:

• Use this product only in the way described in the product literature and 

in this manual. Before using it, verify that this product is suitable for its 

intended use.

• Do not modify system components, especially the controller. Use OEM 

exact replacement equipment or parts. Before use, confirm that the 

product has not been altered in any way.

• Your unit must be properly grounded in conformity with national and 

local electrical codes. Never connect the unit to overloaded power 

sources.

• Disconnect the unit from all power sources before cleaning, 

troubleshooting, or performing other maintenance on the product or its 

controls.

• If the equipment is used in a manner not specified by the manufacturer, 

protection provided by the equipment may be impaired.
Pre-Installation

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 3

3 Pre-Installation

3.1 Unpacking At delivery, examine the exterior for physical damage while the carrier’s 

representative is present. If exterior damage is present, carefully unpack and 

inspect the unit and all accessories for damage.

If there is no exterior damage, unpack and inspect the equipment within five 

days of delivery. If you find any damage, keep the packing materials and 

immediately report the damage to the carrier. Do not return goods without 

written authorization. When submitting a claim for shipping damage, 

request that the carrier inspect the shipping container and equipment.
Installation

4 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

4 Installation Do not exceed the electrical and temperature ratings.

CAUTION: Improper operation of the equipment could result in 

dangerous conditions. To preclude hazard and minimize risk, follow all 

instructions and operate within design limits noted on the dataplate.

4.1 Location Install the unit in a level area free from vibration with a minimum of 6" of 

space on the sides and rear, and 12" at the top are recommended. For 

undercounter models, a minimum of 1" of space on the sides, top and rear 

are recommended.

Do not position the equipment in direct sunlight or near heating diffusers, 

radiators, or other sources of heat. The ambient temperature range at the 

location must be 59 to 90°F (15 to 32°C).

4.2 Wiring

CAUTION: Connect the equipment to the correct power source. Incorrect 

voltage can result in severe damage to the equipment.

DANGER: For personal safety and trouble-free operation, this unit must 

be properly grounded before it is used. Failure to ground the equipment 

may cause personal injury or damage to the equipment. Always conform to 

the National Electrical Code and local codes. Do not connect unit to already 

overloaded power lines.

Always connect the equipment to a dedicated (separate) circuit. Electrical 

codes require fuse or circuit breaker protection for branch circuit conductors. 

Use time delay fuses for #12 AWG circuits.

Chromatography refrigerators are equipped with a duplex vapor-proof 

interior outlet with a maximum of 4 amps per receptacle.

The customer should have the wall receptacle and circuit checked by a 

qualified electrician to verify the receptacle is properly grounded and meets 

power requirements specified on the data plate.

Where a two prong wall receptacle is encountered, it is the personal 

responsibility and obligation of the user to have it replaced with a properly 

grounded three prong receptacle.

WARNING: Do not under any circumstances cut or remove the third 

(ground) prong from the power cord. Do not use a two-prong adapter plug.

The wiring schematic is attached to the back of the cabinet.
Installation

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 5

4.3 Leveling It is important to make sure the unit is level. Use thin sheets of metal to level 

units equipped with casters.

Undercounter models come with leveling feet installed, with casters 

provided in a bag inside the cabinet. The unit must be level. To level 

undercounter units, rotate the leveling screws, located under the front 

corners of the unit, until the unit is level. If the floor is seriously out of level, 

you may need to shim the corners with thin sheets of metal.

4.4 Door Seal To check the door seal, complete the following steps:

1. Open the door.

2. Insert a strip of paper (a couple of inches wide) between the door 

gasket and the cabinet flange and close the door.

3. Slowly pull the paper strip from the outside. You should feel some 

resistance.

4. Repeat this test at 4-inch intervals around the door. If the door does 

not seal properly, replace the gasket.

Note Door seal integrity is critical for refrigerators and freezers. A loose fitting 

gasket allows moist air to be drawn into the cabinet, resulting in quicker frost 

buildup on the evaporator coil, longer running time, poor temperature 

maintenance, and increased operation cost.

4.5 Door Operation Solid doors and standard glass doors for models larger than the 

undercounter model stay open if opened 90 degrees. Door spring tension 

cannot be adjusted.

If the self-closing doors do not work properly, make sure the unit is level.

4.5.1 Adjustable Hinged Glass 

Doors (Undercounter Models 

Only)

On Undercounter models with hinged glass doors, you can use a regular 

screwdriver to adjust spring tension and center each door on its frame. The 

adjustment screws (“torque” for tension and “sag” for door placement) are 

located on the bottom hinge bracket (shown below in Figure 1).

Hinged glass doors can be propped open with metal braces at the bottom 

hinges. Open the door 90 degrees or until you feel some resistance. Push the 

door open past the resistance and the metal braces engage. To close the door, 

push it toward the unit (past the resistance).
Installation

6 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

Figure 1. Undercounter Hinge Bracket for Glass Door Adjustments

CAUTION: Do not overtighten the tension as damage to the equipment 

can result.

WARNING: Disconnect equipment from main power before attempting 

any maintenance to equipment or its controls.

4.5.2 Sliding Glass Doors 45 ft3 models have self-closing sliding glass doors.

If the self-closing mechanism is not working properly, check to make sure 

that the unit is level.

The sliding glass doors can be locked in the closed position, using the 

tubular key provided. To lock these doors:

1. Locate the spring-loaded lock bolt at the bottom left of the right-hand 

door frame.

2. The lock bolt has a small red dot. Insert the key over the bolt, lining 

up the dot with the ridge on the key.

3. Rotate the lock bolt one half turn so that the dot is at the bottom of 

the bolt.

4. Remove the key and push in the bolt to lock the door. The door can 

be locked only when the dot is in the bottom position.

To unlock the doors:

1. Insert the key over the bolt, lining up the dot with the ridge on the 

key.

2. Rotate the lock bolt one half turn so that the dot moves back to the 

top of the bolt. The bolt will then spring back to the unlocked 

position.
Installation

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 7

To hold the right-hand door open, slide the door to the left and use the 

hook located in the side of the left-hand door.

4.6 Final Checks Before start up, complete the following steps:

1. Make sure that the unit is free of all wood or cardboard shipping 

materials, both inside and outside.

2. Verify that the unit is connected to a dedicated circuit.

CAUTION: Connect the equipment to a separate, dedicated, power 

source. Power fluctuations can result in severe damage to the equipment.
Shelves and Wire Baskets (Drawers) Slides

8 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

5 Shelves and Wire 

Baskets (Drawers) 

Slides

For safety in shipping, the shelves are packaged and secured inside the 

cabinet. Insert the shelf support hangers (included with the shelves) into the 

built-in pilasters (located on the inside walls of the cabinet interior) at the 

desired locations. Position the shelves on the flat supports (refer to Figure 2). 

Note The number of shelves supplied per cabinet varies according to type of unit 

and size of cabinet.

Note Also, pharmacy refrigerators come with drawers as an optional accessory. 

Refer to the product catalog for more information.

Figure 2. Shelf Support Hanger

The slides of the wire baskets (standard for pharmacy refrigerators) are 

similar but have a small wire safety clip at the front pilaster which prevents 

the slides from falling when the wire baskets (drawers) are removed. To 

change the position of the slides of the wire baskets (drawers), complete the 

following steps:

1. Locate the safety clip.

2. Slip your fingernail or a small screwdriver under the bottom of the 

wire clip and pry it out toward the inside of the refrigerator.

3. Lift up the slide at front. The slide is free to move from the front 

pilaster.

4. The slides of the wire baskets (drawers) must be removed from the rear 

pilaster at approximately a 45 degree angle towards the center of the 

cabinet.

5. Pull the slide towards the front of the cabinet.

For more information on removing and reinstalling the wire baskets 

(drawers), refer to Section 10.
Control Panel

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 9

6 Control Panel

Figure 3. Refrigerator Control Panel

6.1 Control Panel 

Features

The control panel is located on the top right side of your refrigerator. You 

can use the three pushbuttons (#5, #8, and #9 in Figure 3) to change the 

temperature display (#1) or to adjust temperature and alarm setpoints. The 

thermometer display (#2) provides a quick visual indicator of current 

cabinet temperature and alarm conditions.

Before starting up your refrigerator, take some time to review the control 

panel functions:

1. Main temperature display — during normal operation, shows cabinet 

temperature in degrees Celsius, as measured by the sensor inside the 

cabinet. You can use the buttons to display other values such as 

setpoints and extreme values. The number in the main display flashes 

when you are changing a value.

2. Thermometer — shows cabinet temperature and alarm conditions. 

There are 10 horizontal bars: 9 are displayed during normal operation, 

the tenth (top) bar indicates a warm alarm condition. The number of 

bars illuminated indicates approximate cabinet temperature. 

Depending on alarm settings, 4 or 5 bars illuminated indicate that the 

cabinet is at setpoint.

For example, suppose that the cabinet temperature setpoint is +4°C and that 

the warm and cold alarm setpoints are 8°C and 0°C. Then the number of 

bars illuminated indicates cabinet temperature as follows:
Bars 

displayed

Temperature Bars 

displayed

Temperature

bulb only 0°C (cold alarm) 6 bars 4.8°C

1 bar 0.8°C 7 bars 5.6°C

2 bars 1.6°C 8 bars 6.4°C

3 bars 2.4°C 9 bars 7.2°C

4 bars 3.2°C 10 bars 8.0°C (warm alarm)

5 bars 4.0°C (setpoint)

Control Panel

10 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

When cabinet temperature exceeds the warm alarm setpoint, the top bar of 

the thermometer flashes. When temperature is lower than the cold alarm 

setpoint, the bulb flashes.

When you are in programming mode (described in 1) the thermometer 

shows the setpoint value you are changing.

3. Power failure — illuminates when the main power supply is 

interrupted. In this case the audible alarm also sounds.

4. Service required — illuminates when the controller is in service 

programming mode or when simulated warm or cold alarm 

conditions are failing to occur during an alarm test.

5. Increase — pushbutton used to increase setpoint values in 

programming mode and for various display functions.

6. Door ajar — illuminates when the refrigerator door is open and the 

alarm is activated (key switch turned to the alarm position). (This 

feature is not available for 45 ft3 sliding glass door models.)

7. Battery low — illuminates when the backup battery is low.

8. Decrease — pushbutton used to decrease setpoint values in

programming mode and for various display functions.

9. Scan — pushbutton used to change the main display and for various 

other functions.

10. Audible alarm — illuminates during warm and cold alarm conditions.

For full descriptions of display, programming, and service functions, refer to 

Tables 1, 2, and 3.
Control Panel

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 11

6.2 Display Functions

Table 1: Control Panel Display Functions (including optional alarm functions)

Function Meaning Sequence Display

Normal operation Default display while 

refrigerator is running — Temperature display, thermometer show 

cabinet temperature.

Cold excursion

Show coldest cabinet 

temperature since last 

startup or reset

Press Thermometer, display show cold excursion 

while button is pressed.

Warm excursion

Show warmest cabinet 

temperature since last 

startup or reset

Press Thermometer, display show warm excursion 

while button is pressed.

Mute Silence audible alarm Press Scan Thermometer, display show cabinet 

temperature, alarm icon continues to flash.

Reset Return to default display 

after alarm condition

Press and 

simultaneously, hold 

for five seconds

Excursion values are reset; Thermometer, 

display show cabinet temperature. Display 

blinks to confirm reset.

Alarm test

Test by simulating warm 

alarm conditions; key 

switch must be in alarm 

mode

Press and Scan 

simultaneously, hold 

for five seconds.

Display and thermometer show simulated 

cabinet temperature, alarms flash and sound as 

appropriate. Alarms clear when test is 

completed.

6.3 Alarm Setpoints To enter programming mode, press Scan, hold for 5 seconds, and release. 

The first two values displayed are the warm and cold alarm setpoints. Note 

that the alarm setpoints cannot be adjusted when the key switch is in the 

alarm position

Table 2: Alarm Setpoint Programming Functions (with alarm option only)

Function Programming Sequence

Adjust cold alarm setpoint

Enter programming mode by pressing Scan and holding for 5 seconds. On release, the 

current cold alarm setpoint value flashes in the temperature display; use and to 

adjust it. The display automatically returns to normal operating mode 30 seconds after the 

last key entry or after scrolling through both available functions and parameters.

Adjust warm alarm setpoint

Enter programming mode and press Scan repeatedly. The current warm alarm setpoint 

value then flashes in the temperature display; use and to adjust it. The display 

automatically returns to normal operating mode 30 seconds after the last key entry or after 

scrolling through both available functions and parameters.

.
Control Panel

12 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

6.4 Service Mode 

Parameters

When the key switch is not turned to third (alarm) position, you can access 

service parameters by entering programming mode and pressing Scan for an 

additional 5 seconds. On release of the button, the display will go blank, 

then display “SEr” with the service wrench icon illuminated. Then the 

firmware checksum (read-only) will be displayed for about 4 seconds. 

Pressing Scan repeatedly scrolls through the available service functions. 

While you are in service mode, the wrench icon is illuminated. For any 

flashing parameter you can use and to adjust the value.

Note Resetting any of the following parameter values could adversely 

affect the performance of your refrigerator. These settings very rarely 

need to be changed for normal operation. Be sure to call Service before 

making any adjustments to parameter values.

Table 3: Programming Parameters

Parameter Display Notes

1. Offset Value Center air temperature calibration. Default value is 0 

(maximum ±2.9).

2. Cut on Cut (2 sec.); On (2 sec.); then value Cabinet temperature at which compressor starts to cool 

down to setpoint. Default value is 6oC.

3. Differential dIF (2 sec.); then value

Cut on – differential = temperature at which compressor 

stops after achieving cabinet temperature setpoint. Default 

value is 3.

4. Defrost interval dEF (2 sec.); Int (2 sec.); then value Range 1 to 12 hours; default value is 01.

5. Defrost duration dEF (2 sec.); dur (2 sec.); then value Range 5 to 30 minutes; default value is 15.

6. Defrost high-temp 

termination dEF (2 sec.); HI (2 sec.); then value Temperature at evaporator at which defrost cycle 

terminates; default value is 4oC.

7. Short cycle delay SHO (2 sec.); Cyc (2 sec.); then value Range 0 to 15 minutes; default value is 0.

8. Control probe 

temperature Cnt (2 sec.); Prb (2 sec.); then value Display only.

9. Network address nEt (2 sec.); Adrt (2 sec.); then value Can only be modified by RS-485 communications 

software.

10. Defrost probe

temperature dEF (2 sec.); Prb (2 sec.); then value Display only.
Operation

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 13

7 Operation

7.1 Start Up To start up the refrigerator, complete the following steps:

1. Plug in the power cord.

2. All refrigerators (except undercounter and sliding door models) have a 

double pole circuit breaker switch located next to the power inlet. 

Make sure that it is in the ON (“1”) position.

3. Insert the key in the switch and turn the power on.

4. Rotate the power switch to the ALARM ON position when the 

temperature drops below the warm alarm setpoint.

5. Allow the unit to reach operating temperature before loading it with 

any product. To stabilize the temperature profile, a 24-hour waiting 

period is recommended.

6. After the unit has pulled down to the desired operating temperature, 

turn the three position key switch one turn further clockwise to the 

Alarm On position. (Space Saver units have a separate alarm key 

switch.)

7. If you have a remote alarm, hook it up at this point (refer to

Section 8.3).

8. Whether you have a built-in alarm or a customer-installed remote 

alarm, you should test it following the instructions in Section 8.4. 

Alarm setpoints are factory pre-set for 5.5°C (warm) and 1.5°C (cold) 

for factory settings of +4°C operation.

7.2 Product Loading 

Guidelines

When loading your refrigerator, take care to observe the following 

guidelines:

• Never load the refrigerator beyond capacity. 

• Distribute the load as evenly as possible. Temperature uniformity 

depends on air circulation, which could be impeded if wire baskets 

(drawers) are overfilled, particularly at the top of the cabinet.

• For critical applications, be sure that the alarm systems are working 

and active before you load any product.
Operation

14 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

7.3 Automatic Defrost The defrosting process on all models is primarily accomplished by air 

circulated during off-cycle periods.

Under normal conditions, the temperature warm-up during defrost is 

virtually unnoticeable. However, an occasional 2°C warm-up is possible if 

usage is heavy and ambient conditions are extreme.

7.4 Temperature 

Setpoint Control

Your individual unit has been adjusted and factory tested to maintain a 

stable cabinet temperature. For laboratory refrigerators, cabinet temperature 

setpoint is a computed value based on the service parameters Cut On and 

Differential (refer to Table 3). 

For most applications, however, you will not need to change the 

temperature setpoint.

7.5 Interior Light Switch 

(Glass Door Units Only)

To the right of the control panel is a light switch which operates 

independently of the door switch.

If you leave the panel switch in the OFF position, the door switch will 

automatically turn on the lights when the door is opened and turn them off 

when the door is closed.

If you leave the panel switch in the ON position, the lights will remain on 

even when the door is closed.

WARNING: If you are loading your refrigerator with light-sensitive 

product, be sure to leave the light switch on the control panel in the OFF 

position.

7.6 Convenience Outlet 

(Chromatography 

Refrigerators Only)

Chromatography Refrigerators are equipped with a convenience outlet 

located in the back wall. Power to the outlet is protected by a circuit breaker. 

The breaker is located just below and to the right of the outlet. Pressing the 

breaker button resets the breaker after a fault.

The total load to the convenience outlet should not exceed 4 amps.

The GFCI has a standard self-test feature with color indicators for status:

A solid red light - indicates the breaker has opened the circuit. If this occurs, 

unplug the equipment, check the circuit and reset the circuit breaker 

instruction.

A flashing red LED - indicates “End of Life” and signifies that the receptacle 

needs to be replaced.

A solid green LED - indicates that the receptacle is functional.
Operation

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 15

Figure 4. Receptacle with Lights

WARNING: The convenience outlet is LIVE when the unit is connected 

to an electrical power source, regardless of the position of the key switch.

Red (Solid/Flashing)

Green
Alarm Systems

16 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

8 Alarm Systems

8.1 Operating the Alarm The alarm system is designed to provide visual and audible warning signals 

for both power failure and rise in temperature. The alarm is equipped with a 

battery backup.

The factory d efault warm alarm setpoint is 5.5°C; the default cold alarm 

setpoint is 1.5°C for factory settings of +4°C operation.

The alarm system is activated only when the key switch is turned to the 

Alarm On position. The audible warning signal sounds when there is a 

power failure or temperature alarm condition, or when the door is ajar for 

more than 2 minutes.

The Mute function (pressing the Scan button) allows you to turn off the 

audio warning without turning off the visual indicators.

To turn off and reset flashing visual alarms, press and simultaneously.

There is also a ringback function after approximately 6 minutes if any alarm 

condition remains active.

8.2 Local and Remote 

Alarms

Refrigerators can have either a factory-installed local alarm or an optional 

user-installed remote alarm. Operating and testing procedures are the same 

for both types of alarm.

The maximum distance between a refrigerator and a remote alarm depends 

on the wire gauge used. Refer to Table 4 below:

Table 4: Wire Gauges and Distance to Remote Alarm

Wire Gauge Total Wire Length 

(feet)

Distance to Alarm 1/2 

Wire Length (feet)

20 530 265

18 840 420

16 1,330 665

14 2,120 1,060

12 3,370 1,685
Alarm Systems

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 17

8.3 Installing a Remote 

Alarm (Optional)

Remote alarm terminals are located at the rear of the machine compartment. 

The terminals are: Common, Open on Fail (Normally Closed), and Close 

on Fail (Normally Open).

1. The remote alarm system has two keyhole slots on the back to hang 

the alarm system on the wall. Insert two screws, no longer than a #12 

truss-head type and spaced two inches apart, into a wall and mount 

the alarm.

2. Make the following connections:

a. Connect the common terminal on the cabinet switch to the purple 

wire on the alarm.

b. Connect the normally closed terminal on the cabinet to the black 

(“open on fail”) wire on the alarm. This connection gives an alarm 

when the switch contacts open.

3. Plug the alarm system service cord into an electrical outlet. This alarm 

is designed for 115V/60 Hz, 115V/50 Hz, or 100V/50 Hz operation.

Note If you want the alarm signal to sound when the switch contacts close, 

connect the normally open terminal on the cabinet to the red/white (“close on 

fail”) wire on the alarm. The purple and red/white wires must be tied together in 

this application.

The wiring diagram is attached to the inside of the alarm back cover.

8.4 Alarm Test Note It is important to test your alarm system after any maintenance operation 

or temperature control adjustment.

8.4.1 Theory of Operation This test procedure applies to both factory-installed built-in alarms and 

optional field-installed remote alarms.

During the alarm test, the temperature sensor is artificially heated and 

cooled by a tiny, built-in thermoelectric heating and cooling unit which 

simulates both warm and cold conditions. The electronic control module 

notes the sensor temperature changes and the control panel displays these 

changes.

While this alarm testing procedure is very accurate and reliable, the 

temperature of the refrigerated space does not change during the alarm test.
Alarm Systems

18 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

8.4.2 Alarm Test Procedure Note This test automatically advances through all steps and stops.

1. Verify that the current warm and cold alarm setpoints are within 

normal ranges (the warm and cold simulations may not work if the 

setpoints are set to extreme values).

2. To start the alarm test, press and Scan simultaneously and hold for 

five seconds. During the test the main display and thermometer bulb 

will indicate simulated (not actual) cabinet temperature.

3. When simulated temperature exceeds the warm alarm setpoint, the 

alarm sounds and the alarm icon on the control panel illuminates 

(#10 in Figure 3).

4. The temperature display begins to drop. After a few seconds, the 

temperature in the display is back in the operating range.

5. The alarm stops. The temperature on the display drops until the cold 

alarm sounds.

6. The test is now complete but the alarm continues to sound until the 

temperature on the display is back in the operating range.

If the simulated alarm conditions do not occur during the first five minutes 

of the alarm test, the service (wrench) icon illuminates and the test is 

terminated. You can also terminate the test immediately by turning the key 

switch to the second (non-alarm) position. When during the alarm test, the 

temperature display does not change or the service icon illuminates, check 

the sensor connections.

After an alarm test has terminated, there is a 10-minute delay before the test 

can be run again.
Chart Recorders

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 19

9 Chart Recorders Panel-mounted six inch recorders are available as options on all models. 

Recorder operation begins when the system is powered on.

9.1 Set Up and 

Operation

To prepare the recorder to function properly, complete the following steps:

1. Open the recorder door to access the recorder.

2. Connect the nine volt DC battery located at the recorder’s upper right 

corner. This battery provides back-up power.

3. Install clean chart paper (refer to Section 9.3).

4. Remove the plastic cap from the pen stylus and close the recorder 

door.

Note The recorder may not respond until the system reaches temperatures within 

the recorder’s range.

Figure 5. Six Inch Chart Recorder
Chart Recorders

20 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

Figure 6. Chart Buttons

9.2 Power Supply The recorder normally uses AC power when the system is operating. If AC 

power fails, the LED indicator flashes to alert you to a power failure. The 

recorder continues sensing cabinet temperature and the chart continues 

turning for approximately 24 hours with back-up power provided by the 

nine-volt battery. 

The LED indicator glows continuously when main power is functioning 

and the battery is charged.

When the battery is low, the LED flashes to indicate that the battery needs 

to be changed.

9.3 Changing Chart 

Paper

To change the chart paper, complete the following steps:

1. Locate the pressure sensitive buttons at the front, upper left of the 

recorder panel.

2. Press and hold the change chart button for one second. The pen will 

move off the scale.

3. Unscrew the center nut, remove the old chart paper, and install new 

chart paper. Carefully align the day and time with the reference mark 

on the recorder panel (a small groove on the left side of the panel, 

shown in Figure 5).

4. Replace the center nut and hand tighten. Press the change chart 

button again to resume temperature recording.
Chart Recorders

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 21

9.4 Calibration 

Adjustment

This recorder has been accurately calibrated at the factory and retains 

calibration even during power interruptions. If required, however, adjustments

can be made as follows:

1. Run the unit continuously at the control setpoint temperature. 

Continue steady operation for at least two hours to provide adequate 

time for recorder response.

2. Measure cabinet solution temperature with a calibrated temperature 

monitor. (Solution temperature is measured inside the sensor bottle.)

3. Compare the recorder temperature to the solution temperature. If 

necessary, adjust the recorder by pressing the left (#1) and right (#2) 

chart buttons.

Note The stylus does not begin to move until the button is held for five seconds.
Maintenance

22 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

10 Maintenance

10.1 Cleaning the Wire 

Baskets (Drawers) and 

Cabinet Interior

Pharmacy refrigerators come standard with wire baskets. All other 

refrigerators come standard with wire shelves. Additional wire baskets 

(drawers) and/or shelves are offered as available options.

To clean the wire baskets (drawers) and cabinet interior, remove the wire 

baskets (drawers) following the instructions below. Use a solution of water 

and a mild detergent. Rinse the wire baskets (drawers) and wipe them dry 

with a soft cloth.

10.2 Removing the Wire 

Baskets (Drawers)

The wire baskets (drawers) in all models can be removed for cleaning.

To remove the wire baskets (drawers), complete the following steps (refer to 

Figure 7 and Figure 8):

1. Pull the wire baskets (drawers) towards you until the slide is fully 

extended.

2. Lift the back of the wire baskets (drawers) to disengage the mounting 

tab from the slot on the slide.

3. Raise the back of the wire baskets (drawers) almost to a vertical 

position and disengage the front mounting clips from the slide.

The slides of the wire baskets (drawers) are adjustable. You can position 

these slides in the vertical slots which are spaced at one-inch intervals.

Figure 7. Wire Basket Removal
Maintenance

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 23

Figure 8. Drawer Removal

10.3 Reinstalling the 

Wire Baskets (Drawers)

To reinstall the wire baskets (drawers), complete the following steps:

1. Pull both wire baskets (drawers) slides towards you until the slides are 

fully extended.

2. Position the wire baskets (drawers) between the slides and insert the 

front mounting clips into the slots on front of the slides.

3. Push the back of the wire baskets (drawers) down between the slides 

and insert the wire baskets (drawers) tabs into the back slots.

Note The wire baskets (drawers) fit snugly between the slides. Push on the back 

of the wire baskets (drawers) from the inside to insert the wire baskets (drawers) 

tabs completely into the slots. Make sure both wire baskets (drawers) tabs are 

aligned with the slots on the slides before pushing the wire baskets (drawers) 

down between the slides.

10.4 Cleaning the 

Condenser

WARNING: Disconnect equipment from main power before attempting 

any maintenance to equipment or its controls.

CAUTION: Condensers should be cleaned at least every six months. In 

heavy traffic areas, condensers load with dirt more quickly. Failure to keep 

the condenser clean can result in equipment warm-up or erratic 

temperatures.

Periodically check the condenser to make sure that it is clean.
Maintenance

24 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

In all models except for the 45 ft3 sliding glass door model, the condenser is 

located in the top machine compartment.

To clean the condenser:

1. Disconnect the power.

2. Remove the top grill (bottom front grill if you have a sliding glass door 

model).

3. Use a vacuum cleaner with hose and brush attachments to clean the 

front face of the finned surface.

4. Clean up any loose dust and replace the grill.

5. Reconnect the power.
Troubleshooting

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 25

11 Troubleshooting

WARNING: Troubleshooting procedures involve working with high 

voltages which can cause injury or death. Troubleshooting should be 

performed by trained personnel only.

This section is a guide for troubleshooting equipment problems.

Table 5: Troubleshooting Procedures.

Problem Cause Solution

Unit does not

operate or 

Power Failure 

Indicator is 

on.

Power supply

1. Check that the cord is securely plugged in.

2. All refrigerators (except undercounter and sliding door models) have a double 

pole circuit breaker located next to the power inlet. Make sure that it is in the 

ON (“1”) position. Try cycling the switch to OFF (“0”) then ON (“1”).

3. Plug another appliance into the outlet to see if it is live.

4. If the outlet is dead, check the circuit breaker or fuses.

Temperature 

fluctuates.

Cold control Make sure that the cold control is set correctly. Refer to Section 7.1.

Condenser Make sure the condenser is clean. Refer to Section 10.4.

High pressure

Check the system high-pressure cut-out button. This is an encapsulated control 

with a rubber boot over the reset button. To reset the control, push it down; use 

a blunt instrument to avoid tearing the boot.

Unit warms up.

Door is open Make sure the door is completely closed.

Warm product 

recently loaded in 

unit

Allow ample time to recover from loading warm product.

Power supply Check for proper voltage to the unit. If there is no voltage to the unit, call an 

electrician.

Compressor

1. If the compressor is not running, check if the unit has a power failure alarm. If 

the power failure alarm light is on, have an electrician check for proper 

voltage to the unit.

2. If the compressor is running, open the door and look through the slotted air 

intake in the bottom of the evaporator cover to see if icing is present on the 

evaporator. If icing is present and there is no air flow behind evaporator, call 

technical service for assistance. The evaporator fans may be inoperative.

3. If the compressor is running and there is air flow behind the evaporator, 

contact an authorized service provider or call the technical support hot line for 

assistance.
Accessories

26 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

12 Accessories Alarm Systems

Description Catalog No.

Standard Remote Alarm. Provides audible and visual signal in 

the event of temperature rise or power failure. Adaptable to 

telephone switchboard. Can be located up to 1/3 mile 

(1760 ft/536 m) from cabinet. Must be used with electronic alarm 

system and connected to normally-open or normally-closed remote 

alarm contacts. Wire not included. Specify voltage when ordering.

5612

Deluxe Electronic Remote Alarm System. User programmable to 

sound alarm in the event of temperature rise or power failure. Can 

dial up to four telephone numbers to advise of alarm condition 

across any telephone system which accepts pulse dialing. One 

System can monitor up to four individual cabinets. In addition, the 

System can monitor up to three groups of cabinets. Contact 

Customer Sales for detailed specifications. Customer installed.

6224

Special Voltages

Standard voltages are listed under Voltage in Specification Charts associated 

with each product category. Standard voltages are available at no charge; 

alternative voltages may be available at an extra charge. All voltages must be 

specified when ordering. Contact Customer Sales for more information.

Low Voltage Protection

Description Catalog No.

Voltage Safeguard. Free-standing. Helps protect electrical 

equipment from damage by boosting low voltage automatically. 

Provided with terminal board for direct wiring. Field installed. 

Specify voltage when ordering.

5575

Temperature Recorders

All six inch recorders utilize pressure-sensitive chart paper (1 box @ 50 

charts included); no inking is required.

Description Catalog No.

Temperature recorder, 6 in. circular chart, seven-day drive, panel 

mounted. Factory installed. Specify when ordering. 6183-7

Temperature recorder, 6 in. circular chart, seven-day drive, 

free-standing, for all refrigerator models. Customer installed. 

Specify voltage when ordering.

6199-3
Accessories

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 27

Chart Paper

Description Catalog No.

Chart paper, package of 50, for six inch, seven-day recorder, -40°C 

to +25°C. 6184

Casters

Description Catalog No.

Dual-Wheel Casters. Set of four, two locking, two nonlocking, 3 

in. diameter, for 11.5, 23.3, 29.2, 51.1, and 78.8 cu.ft models only. 6041-1

Extra Shelves

Description Catalog No.

Epoxy Coated. Full Size. For use with 23.3, 45.8, 51.5, and 78.8 

cu.ft models only. 6696

Epoxy Coated. Half Size. For use with 23.3, 45.8, 51.5, and 78.8 

cu.ft models only. 6698

Epoxy Coated. Full size. For use with 29.2 cu.ft models only. 6695

Epoxy Coated. Half size. For use with 29.2 cu.ft models only. 6697

Epoxy Coated. Full size. For use with 11.5 cu.ft models only. 7125

Drawers

Optional stainless steel drawers are offered as an alternative to standard 

shelving.

Description Catalog No.

For 4.9 cu.ft Undercounter Models

For 4.9 cu.ft, roll-out drawer assembly, two drawers. 7129

For 11.5 cu.ft Space Saver Models

For 11.5 cu.ft, roll-out drawer assembly, five drawers. 7445

For 23.3, 51.1, and 78.8 cu.ft Models.

For 23.3 cu.ft, roll-out drawer assembly, six drawers, fully 

adjustable, fully extendable. 6699

For 51.1 cu.ft, roll-out drawer assembly, 12 drawers, fully 

adjustable, fully extendable. 6700
Accessories

28 Installation and Operation Thermo Scientific Revco Laboratory Refrigerators

Extended Warranty Options

Note In addition the standard full warranty on the complete product (USA and 

Canada), an additional four year protection on compressor and compressor parts 

can be supplied. This additional coverage must be purchased at the time of 

original product purchase. Under this contract, the manufacturer agrees to 

furnish a compressor FOB our factory to replace one which has been determined 

to be defective by manufacturer or a factory authorized Service Agency.

Description Catalog No.

Extended Four-Year Compressor Parts Contract, all refrigerators. 6069

Extended 12-Month Comprehensive Coverage, for all models, 

provides additional 12-month warranty coverage, parts and labor. 

Contact Customer Sales for details.

6613

For 78.8 cu.ft, roll-out drawer assembly, 18 drawers, fully 

adjustable, fully extendable. 6701

Additional stainless steel drawers for 23.3, 51.1, and 78.8 cu.ft 

models. 6702

For 45.8 cu.ft Models only

For 45.8 cu.ft, roll-out drawer assembly, six additional stainless 

steel drawers, fully adjustable, fully extendable. 6703

For 29.2 cu.ft Models only

For 29.2 cu.ft, roll-out drawer assembly, six additional stainless 

steel drawers, fully adjustable, fully extendable. 6704

Additional stainless steel drawers for 29.2 cu.ft model. 6725

Description Catalog No.
Warranty

Thermo Scientific Revco Laboratory Refrigerators Installation and Operation 29

13 Warranty Domestic Warranty • 24 Months Full Warranty Parts and Labor

International Warranty • 24 Months Full Warranty Parts Only

During the first twenty four (24) months from shipment, Thermo Fisher 

Scientific Inc, through its authorized dealer or service organizations, will at 

its option and expense repair or replace any part found to be 

non-conforming in material or workmanship. Thermo Fisher Scientific Inc 

reserves the right to use replacement parts, which are used or reconditioned. 

Replacement or repaired parts will be warranted for only the unexpired 

portion of the original warranty.

This warranty does not apply to damage caused by (i) accident, misuse, fire, 

flood or acts of God; (ii) failure to properly install, operate or maintain the 

products in accordance with the printed instructions provided, (iii) causes 

external to the products such as, but not limited to, power failure or 

electrical power surges, (iv) improper storage and handling of the products, 

(v) use of the products in combination with equipment or software not 

supplied by Thermo Fisher; or (vi) installation, maintenance, repair, service, 

relocation or alteration of the products by any person other than Thermo 

Fisher or its authorized representative. To obtain proper warranty service, 

you must contact the nearest authorized service center or Dealer. Thermo 

Fisher Scientific, Inc’s own shipping records showing date of shipment shall 

be conclusive in establishing the warranty period. At Thermo Fisher’s 

option, all non-conforming parts must be returned to Thermo Fisher 

postage paid and replacement parts are shipped FOB Thermo Fisher’s 

location.

Limitation of Liability

THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER 

WARRANTIES, WHETHER WRITTEN, ORAL, OR IMPLIED. NO 

WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A 

PARTICULAR PURPOSE SHALL APPLY. THERMO FISHER DOES 

NOT WARRANT THAT THE PRODUCTS ARE ERROR-FREE OR 

WILL ACCOMPLISH ANY PARTICULAR RESULT.

THERMO FISHER SHALL NOT BE LIABLE FOR ANY INDIRECT 

OR CONSEQUENTIAL DAMAGES INCLUDING, WITHOUT 

LIMITATION, DAMAGES TO LOST PROFITS OR LOSS OF 

PRODUCTS.
WEEE Compliance

WEEE Compliance. This product is required to comply with the European Union’s Waste 

Electrical & Electronic Equipment (WEEE) Directive 2012/19/EC. It is marked with the 

following symbol. Thermo Fisher Scientific has contracted with one or more 

recycling/disposal companies in each EU Member State, and this product should be 

disposed of or recycled through them. Further information on our compliance with these 

Directives, the recyclers in your country, and information on Thermo Scientific products 

which may assist the detection of substances subject to the RoHS Directive are available at 

www.thermoscientific.com/

Great Britain

WEEE Konformittät. Dieses Produkt muss die EU Waste Electrical & Electronic 

Equipment (WEEE) Richtlinie 2012/19/EC erfüllen. Das Produkt ist durch folgendes 

Symbol gekennzeichnet. Thermo Fisher Scientific hat Vereinbarungen getroffen mit 

Verwertungs-/Entsorgungsanlagen in allen EU-Mitgliederstaaten und dieses Produkt muss 

durch diese Firmen widerverwetet oder entsorgt werden. Mehr Informationen über die 

Einhaltung dieser Anweisungen durch Thermo Scientific, dieVerwerter und Hinweise die 

Ihnen nützlich sein können, die Thermo Fisher Scientific Produkte zu identizfizieren, die 

unter diese RoHS. Anweisungfallen, finden Sie unter www.thermoscientific.com/

Deutschland

Conformità WEEE. Questo prodotto deve rispondere alla direttiva dell’ Unione Europea 

2012/19/EC in merito ai Rifiuti degli Apparecchi Elettrici ed Elettronici (WEEE). 

È marcato col seguente simbolo.Thermo Fischer Scientific ha stipulato contratti con una o 

diverse società di riciclaggio/smaltimento in ognuno degli Stati Membri Europei. Questo 

prodotto verrà smaltito o riciclato tramite queste medesime. Ulteriori informazioni sulla 

conformità di Thermo Fisher Scientific con queste Direttive, l’elenco delle ditte di 

riciclaggio nel Vostro paese e informazioni sui prodotti Thermo Scientific che possono 

essere utili alla rilevazione di sostanze soggette alla Direttiva RoHS sono disponibili sul sito 

www.thermoscientific.com/

Italia

Conformité weee. Ce produit doit être conforme à la directive euro-péenne (2012/19/EC) 

des Déchets d’Equipements Electriques et Electroniques (DEEE). Il est marqué par le 

symbole suivant. Thermo Fisher Scientific s’est associé avec une ou plusieurs compagnies de 

recyclage dans chaque état membre de l’union européenne et ce produit devraitêtre collecté 

ou recyclé par celles-ci. Davantage d’informations sur laconformité de Thermo Fisher 

Scientific à ces directives, les recycleurs dans votre pays et les informations sur les produits 

Thermo Fisher Scientific qui peuvent aider le détection des substances sujettes à la directive 

RoHS sont disponibles sur www.thermoscientific.com/

France
Important

For your future reference and when contacting the factory, please have the 

following information readily available:

Model Number: 

Serial Number:

Date Purchased:

The above information can be found on the dataplate attached to the 

equipment. If available, please provide the date purchased, the source of 

purchase (manufacturer or specific agent/rep organization), and purchase 

order number.

IF YOU NEED ASSISTANCE:

Thermo Scientific products are backed by a global technical support team 

ready to support your applications. We also offer cold storage accessories, 

including remote alarms, temperature recorders and validation services. 

Visit www.thermoscientific.com or call:

USA/Canada Germany international

Sales: +1 866 984 3766 Sales: +49 6184 90 6000

India toll free Germany national toll free 

Sales: 1800 22 8374 Sales: 0800 1 536 376

India Italy

Sales: +91 22 6716 2200 Sales: +32 02 95059 552

China Netherlands

Sales: +800 810 5118 (or)

+400 650 5118 Sales: +31 76 579 55 55

Japan Nordic/Baltic/CIS countries

Sales: +81-120-753-670 Sales: +358 9 329 10200

Australia Russia

Sales: +61 39757 4300 Sales: +7 812 703 42 15

Austria Spain/Portugal

Sales: +43 1 801 40 0 Sales: +34 93 223 09 18

Belgium Switzerland 

Sales: +32 53 73 42 41 Sales: +41 44 454 12 22

France UK/Ireland 

Sales: +33 2 2803 2180 Sales: +44 870 609 9203

New Zealand Other Asian countries

Sales: +64 9 980 6700 Sales: +852 2885 4613

Countries not listed

Sales: +49 6184 90 6000
Thermo Fisher Scientific Inc.

275 Aiken Road

Asheville, NC 28804

United States

www.thermofisher.com

34830H61 Rev. G