Multicrest
fire alarm system

TM

FDHU003-D-X
RATE - OF - RISE /FIXED TEMPERATUREHEAT DETECTORFeatures• Very Low Profile (30.7mm/1.21-inch only in height)• Adjustable Fixed 57°C to 79°C (135°F to 174°F)• True Analog Detector for Fixed Temperature• Rate-of-Rise Feature• Simple and Accurate Address Setting without Mechanical Switches• LEDs for 360° Viewing

Description
The combination Rate-of-Rise/Fixed Temperature Heat Detector (FDHU003-D-X) is an Analog/Addressable combination temperature heat ofInteglex Multicrest series. The heat sensing portion utilizes a proven thermistor for accurate and reliable heat detection. The detector and base (notincluded) are made of a durable plastic in an eggshell white (off white) to blend in with the ceiling.
The new Nohmi circuit integration technology was introduced to the FDHU003-D-X. This state-of-the-art technology was able to simplify theproduct circuits and down-size the product structure significantly.
The FDHU003-D-X is UL listed with a selectable fixed temperature point from 57°C to 79°C ( 135°F to 174°F ) and a rate of rise feature. Therate-of-rise operates when the temperature increases 7°C to 8°C (12°F to 15°F) per minute occurs. The heat detector is ideal for installations
needing the earlier heat detection. The FDHU003-D-X has two LEDs that allow for 360° viewing. The detector is compatible with any of the Nohmi
bases indicated in this sheet and simply twists on. The FDHU003-D-X is addressed using the hand held programmer or the control panel
addressing function.

Ordering Information
Model no. FDHU003-D-X

Spacing
The FDHU003-D-X spacing is dependent on the alarm set-point. The unit is listed from 57 to 79°C (135°F to 174°F).
However as the temperature setting increases, the spacing decreases.
No.
1
2

Alarm set-point
57°C to 76°C (135°F to 170°F)
77°C to 79°C (171°F to 174°F)

Max. 15.2m (50 feet)Max. 4.5 m (15 feet)

SpacingSpecifications
No.
1234567891011Item
Working voltage range
Standby current
Alarm indicator
Alarm indicator current
Alarm set-point range
Installation temperature range
Operating relative humidity range
Start-up time
Color
Weight (without base)Dimensions (without base)Specification
22.0 to 24.0 V
250 μA
2 LEDs
1.5 mA D.C
57°C to 79°C (135°F to 174°F)
0°C to 38°C (32°F to 100°F)
0% to 93% (Non-condensing)Max. 1 sec.
Eggshell White
65g (2.29 oz)
Height: 30.7mm (1.21 inch) Diameter: 99mm (4.0 inches)

Setting the Address
Each addressable module, smoke detector, heat detector and combination detector must have the address set before connecting the device tothe Signaling Line Circuit (SLC) loop. The address is set using the hand held device programmer or the addressing feature on the control panel.

Compatible Bases

All bases will mount on a single gang, double gang, octagon, 4 inches square or mud ring electrical box.
No.
123
4DeviceFZBU004-AB4
FZBU003-AB6
FZBU013-2Z
FZBU013-4Z

5

FZBU005-AIB6FZBU005-ARB

7

FZBU005-ASB

Description
4 inches Standard Base
6 inches Standard Base
4 inches Standard base, 2 terminals (without remote indication circuit)4 inches Standard Base, 4 terminals
6 inches base that has an isolator module included.
The base is pre-wired with a pluggable jumper to the module.
6 inches base that includes a dual relay module.
One relay is rated for 8 amps at 240 VAC/30 VDC and the second is rated for 2 amps at 240 VAC/30 VDC.
The base is pre-wired with a pluggable jumper to the module.
6 inches base with sounder module included. Sound pattern is provided from external source.
The base is pre-wired with a pluggable jumper into the module.

Wiring Diagram
Typical wiring of detector base onto which detector is mounted.

S+
From FACP or the previous
addressable device on the SLC loop

S+
To the next addressable device

S-S-NOTE・The information contained herein does not purport to cover all the details or variations of the equipment described, nor to provide for every
possible contingency that may be met in connection with its installation, operation or maintenance.
・Specifications are subject to change without notice. Contact Nohmi before relying on the information.
・Actual performance is based on proper application of the product by a qualified professional.
・Should further information be required or should particular concerns arise that are not covered sufficiently for the purchaser’s purposes, thematter should be referred to Nohmi or your nearest distributor.

Contact• Head Office: 4-7-3 Kudan-Minami, Chiyoda-ku, Tokyo
102-8277, Japan• Phone: (81) 3 - 3265 - 0231
• F A X: (81) 3 - 3265 - 5348
URL https://www.nohmi.co.jp/english/

Catalog Number 180810Ⓓ-F-20701YO1