CM0068KO2305

Hot water meter handling and installation
precautions

amplify the rotation of the impeller, resulting in inaccurate

Please observe the following precautions to ensure safe and correct use of the productweighing. The maximum operating pressure is 1 MPa.

The information in this instruction manual must be followed for safety in handling.
Warning
CautionIndicates a potentially hazardous situation which, if ignored and mishandled, could result in death or serious injury.

This symbol indicates a potentially hazardous situation which, if ignored and mishandled, could resultin minor injury to persons or damage to property only.

About Pictorial Display

In this manual and on the product, various pictorial symbols are used to ensure safe and correct use of the product and to prevent injury to
you or others or damage to property. The following is a list of the indications and their meanings.

Example of pictorial display
This symbol announces that there iscontent that warrants attention(including danger and warning).

Install the meter in a location where fluctuations in waterpressure are minimal. Fluctuations in water pressure may

This symbol tells you that theaction
isprohibited.
Specificprohibited contents are depictedin the diagram.

This symbol tells you what you areforcing or directing an action to do.

Do not install in a location subject to vibration.
Vibration may amplify the rotation of the impeller,
resulting in inaccurate weighing.

Do not use the meter as a scaffold or place heavy
objects on the meter.
Doing so may cause damage to the unit.
Do not use the upper flange of the unit for slinging.
Doing so may cause damage to the unit.
Tighten the union nut within the tightening torque range shown
below.
Tightening torque for union nut (approximate)

Do not install in a location subject to electrical noise.
Near a high-voltage power supply, motor, etc., electronicparts, etc., may not work properly due to electrical noise,
and accurate measuring may not be possible.
Do not install in a location where it will be affected bymagnetism. Magnetic influences may prevent
electronic components, etc. from functioning properly,
resulting in inaccurate measuring. The meter should
be installed in a space with a magnetic field of 0.2
Tesla (2000 Gauss) or less.
Do not install in a location where it will be constantly submerged in water.

Bore（mm）

Tightening torque15

6～10N・m20

14～22N・m

25

17～27N・m

32

25～35N・m

40

40～50N・m

When installing a flange connection type hot water meter,tighten all nuts evenly.
Unevenly tightened nuts may cause leakage.

Do not install the meter in an area filled with flammablegas.
Doing so may cause fire, electric shock, or injury.

Safety Precautions
Warning
Please be careful when carrying and installing the meter.
The weight load may cause physical injury, or drop themeter and cause injury.
When carrying heavy objects, be careful not to hit themagainst the human body or other equipment.
Doing so may not only damage the product but also causeinjury.
Do not disassemble the meter.
All meters are subject to the disassembly prohibition.
Disassembling a meter that has electronic components
inside may result in ignition or burns.

Caution
Do not touch the screws or edges directly.
Use gloves when handling the product to avoid the risk of injury.
Use appropriate tools such as wrenches for piping work.
Failure to do so may cause malfunctions or accidents.
Be careful not to catch your body or clothes on the screws oredges.
Failure to do so may result in injury.

Do not allow air to pass through the meter while it is in storage.
If air passes through the meter, the impeller may rotate, causing themeasuring value to advance (or return). Attach a protective cap
or similar item to the meter inlet/outlet while storing the meter.
Do not allow foreign objects to enter the meter during meterstorage.
If foreign matter gets inside the meter, it may interfere with therotation of the impeller, making weighing impossible. Install aprotective cap or similar device on the meter inlet/outlet while
the meter is in storage.
Do not use with hot water higher than 90°C.
Do not use the meter for hot water over 90°C, as hot
water flow over 90°C may damage parts inside the meter.

Note on installation location
The meter should be installed in a location that satisfies thefollowing requirements

Warning. Do not install in a place filled with flammable gas.

Failure to do so may cause fire, electric shock, or injury.

CautionInstallon a flat surface.
水Install the meter horizontally, following the arrow
indicated on the meter, with the indicating part up
and not facing the opposite direction.

n448φｄ506580100819Do not install in direct sunlight or near any heating elements.
When using the product outdoors, cover it with a roof or similar
covering to prevent direct sunlight.

Precautions for installation
When installing the meter, be sure to observe the following items toensure proper measuring accuracy.

CautionThe meter mounting dimensions should be the same as
the overall length of the meter and the thickness of thepacking. If the installation dimensions are too short, themeter cannot be installed in the piping.
Be sure to remove the meter when welding piping. The hightemperature during welding may damage the meter.
Use packing of the specified size for meter connection.
Wrong dimensions may cause water leakage from theconnection.
Provide a straight pipe upstream and downstream of themeter, respectively.

Install the meter in a location where it is easy to install andremove. The meter needs to be replaced every certification
maturity (8 years). Select a location with good workability forthis purpose.
Install the meter in a location where it is easy to read the meter.
Meters must be read periodically. For this reason, choose a locationthat is not affected by humidity or rainwater, and a location that iseasy to read.
Do not install in locations where there is a risk of freezing.
During winter, the meter may be damaged due to freezing
expansion of water. Take measures to prevent freezing, suchas installing below the freezing depth and installing heatinsulation.
Do not install the meter in a location where air remains
in the meter.
Keep the meter full of water at all times.

Small Bore Meters (Threaded)

upstream
downstream
Bore x 3 times Bore x 1 time

Large Bore Meters (Flange Type)

Bore x 5 times Bore x 3 times

Before installing the meter, be sure to run water through thepipe to clean it.
Foreign matter such as dust in the water supply pipe may damage
the measuring section or inhibit the rotation of the impeller,
resulting in inaccurate measuring.
When starting the water supply, open the stopcock or valve slowly.
Sudden opening may cause water hammer and damage the meter.
Do not apply force to the output cable.
The cable may break (. pulse-type hot water meter)bolt holeBore（mm）

malfunction or fail to operate.

Meter Type

Caution

Do not store meter at high or low temperatures. The
storage temperature range for meters is -20°C to+40°C. Storage outside of this temperature range
may result in a deterioration of the functions of partsand other components in the transmitter, making
weighing impossible.

Number of bolt holes

1919
19

Precautions for use
CautionSelect a meter within the proper flow range and within
the maximum monthly usage.
Bore

1520253240

Appropriate flow range（m3/h）

0.1～0.8

0.15～1.2

0.2～1.6

0.4～3.2

0.5～4.0

Maximum monthly usage

85125

170

340420Bore
Appropriate flow range（m3/h）

50

65

80

100

1.5～122.0～16

3.0～24

5.0～40Maximum monthly usage

2,100

3,300

4,200

6,700

This meter is a hot water meter (15-40 mm), which is a
specified measuring instrument specified by the Measurement Law,
and its expiration date is specified by the Measurement Law. The
meter cannot be used for trading purposes after the expiration dateof the verification test, so please stop using this meter. Expiration
dateThe expiration date is marked on the meter.

Straight pipe section of impeller type meter

Handling Precautions

Do not subject the meter to strong vibration duringstorage. If the meter is subjected to strong orprolonged vibration, the impeller bearing may bedamaged, parts in the transmitter may be damaged,
solder may come off, etc., and the meter may become
unweighable.

Doing so may adversely affect the meter and cause it toAccurate measuring may not be possible due to bent pipesor valves.

Do not use this product for any purpose other than warmwater. Doing so may cause the unit to malfunction.

Do not subject the meter to strong shocks duringstorage. Dropping or striking the meter may damage theimpeller bearing, damage parts inside the transmitter, orcause solder to come off, making weighing impossible.

Do not install the meter where it is exposed to oil (kerosene, fueloil, etc.) or corrosive gases.

Disposal Precautions
CautionWhen disposing of the product, dispose of it as industrial waste.

Warranty Period● The warranty period is one year from the date of delivery

from the Company.

Disclaimer
・Failure due to force majeure such as disasters
・Failure due to improper handling by the user
・Failure caused by modification or repair by someone otherthan the Company
・Secondary induced failures and failures caused by the failureof the delivered product・Failure due to causes other than the delivered productHot water meters with a bore of 40 mm or less are considered specified measuring instruments■ How to rotate the display

under the Measurement Law. The validity period of the certification is 8 years. For meters larger

Our hot water meters can be rotated (360°)
to a position that is easy to read.
→ Loosen the screw on the back of the display, rotate
it to a position where it is easier to see, andretighten the screw.

than 50 mm, replacement is recommended every 5 years to maintain performance.

■ How to read the display
Integral Indication Division
Installation posture (H = horizontal)
Fixed maximum flow rate（Q3）Year of manufacture (A.D.)
Water temperature level（Max 90℃）
Model Approval Number
Measuring range（R＝Q3/Q1）■ About Pulse Output■ Signal line: 2 wires (black and white), no polarity
Pulse output setting (specified when ordering product)■ Standard conformity seal and certification expiration date・ A company name and model notation sticker is affixed to the back of the totalization display.
• The standard conformity stamp and the certification expiration date are stamped on the plate.

Meter type

Boretransmitted pulse unit

GKHA・GKHL

15 〜 40

Select from 10L/P, 100L/P, 1m3/P

GBHT

50 〜 100

Select from 100L/P, 1m3/P

Regarding the outgoing pulse ON timeComp. name and modelnotation sealQ4（m3/h） Pulse rate ON time Type and bore Flow (m3/h)

Pulse rate ON time

expiration date

Type and bore

Ex: End of July 2029

GKHA（L ）15

2.010L/P

3sec

GBHT5025100L/P

2sec

GKHA205.010L/P

1sec

GBHT6535100L/P

2sec

GKHL255.010L/P

1sec

GBHT8050100L/P

1sec

GKHA3212.510L/P

0.5sec

GBHT100

75100L/P

0.9sec

GKHA4012.510L/P

0.5sec■ About Pulse Transmitting Hot Water Meters
Systematized measuring instrument symbol

11：1×10 10L/P
12：1×102＝100L/P
1＝Pulse width (ON time) at maximum flow rate. Since the reed switch is operated by a magnet, the ON time of the pulse varies depending on the flow rate.
. At maximum flow rate, the pulse ON time is the shortest, as shown in the table above.

※Pulse output rate（1m3/P）

13：1×103＝1,000L/P. Under normal conditions of use, the ON time will be longer than this.

2613. For 15 to 40 mm, the calculation is based on 10 L/P, which has the shortest ON time.

2613
1×103=1,000L/P=1m3/P
Pulse signal method
If the unit has a pulse output function, a specific number is indicated afterthe "R" mark. The leading "26" indicates the signal form of the pulse, which
may vary depending on the manufacturer.
The second half "13" indicates the pulse rate.

【Glossary】
・Type approval number: Number approved for transaction certification
・Designated manufacturer's mark: Notification mark of the manufacturer
・Registered trademark: Azbil Kimmon
・(Measuring range: value of Q3 (maximumflowrate)/Q1(minimum flowrate) =proportional) R100 = Q1:Q3 = 1:100

・Mounting position: H=horizontal installation only
・Pilot: flow of water = rotation of impeller
・Standard conformity seal: Seal of certification thatthe product has passed the certification test

・Validity date of certification: Japanesecalendar. Usable expiration date for tradecertification