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D400-64-00                                                                                             11                                                                                             I56-991-08R

F36-05-00                                       Replacement Air Filter (two per package)
M02-04-01                                      Replacement Test Magnet
P48-21-00                                       Replacement End Plug for inlet sampling tube
RS14                                              Replacement Screen, Ion
A2650-01                                        Replacement Installation Kit (mounting hardware)
DH400 OE-1                                   Enclosure for outdoor applications

Sampling (Inlet) Tubes

TUBE                                             OUTSIDE DUCT WIDTH
ST-1.5                                            1 to 2 feet 

(0.3 to 0.6 m)

ST-3                                               2 to 4 feet 

(0.6 to 1.2 m)

ST-5                                               4 to 8 feet 

(1.2 to 2.4 m)

ST-10                                             8 to 12 feet  (2.4 to 3.7 m)

Exhaust Tube Extension 

A2440-00                                       5.75 in. (14.6 cm.) additional

Electrical Specifications

Power supply voltage:                   20-29 VDC         24 VAC 50-60-Hz       120 VAC 50-60 Hz    220/240 VAC 50-60 Hz
Input capacitance:                        270 µF max.            270 µF max.                     N/A                            N/A
Reset voltage:                            3.0 VDC or less         2.0 VAC or less          10 VAC or less              20 VAC or less
Reset time (by power down):       0.6 sec. max.           0.6 sec. max.              0.6 sec. max.                0.6 sec. max.
Power up time:                             34 sec.max.            34 sec. max.               34 sec. max.                34 sec. max.
Alarm response time:                   2 to 17 sec.             2 to 17 sec.                2 to 17 sec.                  2 to 17 sec.

Electrical Ratings

[8] DH400 OE-1 Optional Accessory
General Description

The  DH400  OE-1  all-weather  enclosure  is  specifically 
designed  to  house  and  protect  the  System  Sensor  model 
DH400ACDCIHT high temperature duct detector from the 
elements.  This  enclosure  provides  protection  in  outdoor 
installations  against  rain,  sleet,  and  snow  or  in  indoor 
installations against dripping water.

NOTE: 

  The  DH400  OE-1  is  designed  solely  for  the  use 

with  System  Sensor  model  DH400ACDCIHT  high 
temperature duct smoke detector.

Preparation

Locate the two adhesive backed gaskets packaged with the 
enclosure.

NOTE:

  In order to provide effective sealing, these gaskets 

must  be  placed  on  the  outside  of  the  enclosure 
around the two large openings.

Remove the protective paper.  Place the gaskets around the 
large openings, aligning the screw holes of the gaskets with 
the  screw  holes  of  the  enclosure.    Press  firmly  to  insure 
complete adhesion.

Power Supply Voltage

20-29 VDC 

24VAC 50-60 Hz 

120 VAC 50-60 Hz

220/240 VAC 50-60 Hz

CURRENT REQUIREMENTS (USING NO ACCESSORIES)*

Max. standby current

25 mA

35 mA AC avg.

20mA AC avg.

20mA AC avg.

Max. alarm current

95 mA

55 mA AC avg.

55 mA AC avg.

30 mA AC avg.

*NOTE: Accessories require extra current. Refer to accessory device manual.

CONTACT RATINGS

Alarm initiation contacts (SPST) 2.0A @ 30 VAC/DC (0.6 power factor)
Alarm auxiliary contacts (DPDT) 10A @ 30 VDC Resistive
10A @ 250 VAC
NOTE: Alarm auxiliary contacts must switch 500 mA minimum at 24 VDC. Alarm auxiliary contacts shall not be 
connected to initiating circuits of control panels. Use the alarm initiation contact for this purpose.
Trouble contacts (SPST) 0.3A @ 32 VDC (resistive)

Summary of Contents for DH400ACDCIHT

Page 1: ...Fig 11 Detector Head Removal 9 Fig 12 RTS451 RTS451KEY Test Coil Installation 10 Fig 13 Ion Head Exploded View 10 1 General Description An HVAC system supplies conditioned air to virtually every area of a building Smoke introduced into this air duct sys tem will be distributed to the entire building Smoke detec tors designed for use in air duct systems are used to sense the presence of smoke in th...

Page 2: ...4 7 Perform detector check 5 4 8 Install the cover 8 4 1 Verify Duct Air Flow Direction And Velocity Model DH400ACDCIHT detectors are designed to be used in air handling systems having air velocities of 500 to 4000 feet per minute Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these parameters If necessary use a velocity meter to check the air ...

Page 3: ...o the sampling tube holes as indicated in Figure 4 Table 1 Inlet tubes required for different duct widths Outside Duct Width Inlet Tube Required 1 to 2 ft ST 1 5 2 to 4 ft ST 3 4 to 8 ft ST 5 8 to 12 ft ST 10 4 4 1 Installation For Ducts Less Than 8 Feet Wide 1 If the tube is longer than the width of the air duct drill a 3 4 inch hole in the duct directly opposite the hole already cut for the inle...

Page 4: ...TION FLANGE H0108 02 AIR FLOW DIRECTION DETECTOR HOUSING DOTS INDICATE POSITION OF SAMPLING TUBE HOLES AIR FLOW DIRECTION DETECTOR HOUSING SAMPLING TUBE EXHAUST TUBE AIR FLOW DIRECTION EXHAUST TUBE SAMPLING TUBE SAMPLING TUBE EXHAUST TUBE DETECTOR HOUSING AIR FLOW DIRECTION DETECTOR HOUSING A B C D HORIZONTAL MOUNTING OF HOUSING VERTICAL MOUNTING OF HOUSING Figure 5 Tube mounting configurations wi...

Page 5: ...l strip with clamp ing plates Wiring connections are made by stripping about 3 8 inch of insulation from the end of the wire sliding the bare end under the plate and tightening the clamping plate screw The detector may be wired for interconnection to UL listed control panels or for stand alone service per NFPA 90A Refer to the wiring diagrams of Figures 6 7 and 8 to select the appropriate circuit ...

Page 6: ... IN STANDBY CONTACTS CLOSE IN ALARM 8 9 ALARM INITIATION CONTACTS CONTACTS SHOWN OPEN IN STANDBY CONTACTS CLOSE IN ALARM ALARM INITIATION LOOP UL LISTED CONTROL PANEL FIRST DETECTOR IN THE LOOP DH400ACDCIHT LAST DETECTOR IN THE LOOP DH400ACDCIHT EOL RESISTOR SPECIFIED BY PANEL MANUFACTURER CONNECT POWER SOURCE TO APPROPRIATE TERMINALS OF EACH DETECTOR SEE SPECIFICATIONS FOR ADDITIONAL POWER SUPPLY...

Page 7: ...S REFER TO MANUFACTURER S INSTALLATION INSTRUCTIONS OR CONTACT MANUFACTURER TROUBLE CONTACT RATING 0 3A 32 VAC DC POWER INPUTS ACCEPT 24 VDC 24 VAC 50 60 HZ 120 VAC 50 60 HZ OR 220 240 VAC 50 60 HZ CONNECT POWER SOURCE TO APPROPRIATE TERMINALS OF EACH DETECTOR ALARM AUXILIARY CONTACT RATINGS 10A 30 VDC RESISTIVE 10A 250 VAC 500mA MINIMUM 24 VDC NOT INTENDED FOR CONNECTION TO CONTROL PANELS ALARM I...

Page 8: ...ke behavior even when they are up to 90 clogged Quarterly visual inspec tion is usually often enough to determine if filters should be replace because only a high percentage of contamina tion affects duct detector performance Figure 9 Wiring diagrams for optional accessories see Figure 7 for APA451 wiring diagram ALARM SIGNAL AUX POWER 5 6 DUCT DETECTOR DH400ACDC PA400 OPTIONAL AUDIBLE ALERT ALARM...

Page 9: ...head removal TEST LOCATOR TEST MAGNET PAINTED SIDE TOWARD HOUSING DUCT HOUSING DETECTOR HEAD RESET LOCATOR TWIST COUNTERCLOCKWISE TO REMOVE DUCT HOUSING TWIST CLOCKWISE TO INSTALL DETECTOR HEAD H0243 00 H0244 00 5 2 3 Sensitivity Tests 5 2 3 1 MOD400R Sensitivity Test After verification of alarm capability use the MOD400R test module with a voltmeter to check detector sensitivity as described in t...

Page 10: ...H400ACDCIHT Air Duct Smoke Detector Specifications Description HVAC air duct mounted ionization smoke detector for separately powered systems or stand alone systems Auxiliary alarm relay contacts provide fan contactor shutdown to prevent HVAC circulation of smoke Environmental Limits Operating Temperature 32 to 158 F 0 to 70 C Storage Temperature 22 to 158 F 30 to 70 C Humidity 10 to 93 R H non co...

Page 11: ...ements This enclosure provides protection in outdoor installations against rain sleet and snow or in indoor installations against dripping water NOTE The DH400 OE 1 is designed solely for the use with System Sensor model DH400ACDCIHT high temperature duct smoke detector Preparation Locate the two adhesive backed gaskets packaged with the enclosure NOTE In order to provide effective sealing these g...

Page 12: ... repair or replace units which are found to be defective because of damage unrea sonable use modifications or alterations occurring after the date of manu facture In no case shall the Company be liable for any consequential or incidental damages for breach of this or any other Warranty expressed or implied whatsoever even if the loss or damage is caused by the Company s negligence or fault Some st...

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