System-sensor D4240 User Manual download pdf (Page 6)

SS-300-022 6 I56-3936-003R

FIGURE 8. MULTIPLE FAN SHUTDOWN

(INTERCONNECTION OF D4240’S):

DETECTOR 1

240 VAC

D4240

C, AUX A

NC, AUX A

DET.

MAX.

INT/AUX–

INT+

SYSTEM CONTROL

POWER, FAN

CONTROL OR

THERMOSTAT

SYSTEM CONTROL

POWER, FAN

CONTROL OR

THERMOSTAT

–

DETECTOR 2

240 VAC

D4240

C, AUX A

NC, AUX A

INT/AUX–

INT+

–

[11.1] IMPORTANT INTERCONNECTION NOTES:

• When using the interconnect feature, all interconnected units must be

powered using the same independent supply.

• Polarity must be maintained throughout the interconnect wiring.

Connect the INT+ terminal on unit 1 to the INT+ terminal on unit 2

and so on. Similarly, connect the INT/AUX- terminal on unit 1 to the

INT/AUX- terminal on unit 2 and so on.

• Up to 50 D4240 units may be interconnected.

• Up to 10 DH100ACDC units may be interconnected. Please note that

each of the 9 DH100ACDC units interconnected can be substituted by

three D4240 units. Therefore, when using the interconnect feature a

single DH100ACDC can drive either 9 DH100ACDC’s or 27 D4240 units.

NOTE: Alarm can be reset only at the initiating device and not at the devices

interconnected.

[12] VERIFICATION OF OPERATION

[12.1] FIELD SELECTABLE SETTINGS

Verify dip switch settings as per Table 2 on Page 5.

[12.2] POWERING THE UNIT

Apply 24 VDC power to 9 and 10 terminals or apply 240VAC on terminals

named 240VAC. Please note that a varistor is put across the 240 VAC termi-

nals to protect the product from transient damage. See Figure 7 and electrical

specifications for details.

[12.3] PERFORM DETECTOR CHECK

VERIFY STANDBY AND TROUBLE TEST per Table 3 on page 8. The use of a

remote accessory for visible indication of power and alarm is recommended.

NOTE: If an instantaneous tamper delay is selected a trouble may be indicated

with the cover installed.

[12.4] SENSITIVITY VERIFICATION

The sensitivity of the sensor is confirmed to be operating within its allowable

range each time the sensor and power board LEDs blink green every 5 sec-

onds. Note in a maintenance condition the sensor LEDs will blink red every 5

seconds and power board will blink amber as depicted in Table 3 on page 8.

The maintenance condition indicates that the sensor is operating outside its

original factory preset sensitivity and shall be cleaned or replaced. See Section

9 for reference. This is a valid UL test.

[12.5] DETECTOR CLEANING PROCEDURES

Notify the proper authorities that the smoke detector system is undergoing

maintenance, and that the system will temporarily be out of service. Disable

the zone or system undergoing maintenance to prevent unwanted alarms and

possible dispatch of the fire department.

[12.5.1] ALARM TESTS

1a. Test/Reset Button - Press and hold the test button located on the power

board cover for at least 2 seconds.

1b. M02-04-00 Magnet Test (Magnet sold separately) - Place the painted sur-

face of the magnet onto the MAGNET TEST location on the sensor cover

of unit (Figure 1).

1c. Remote Test Accessory - See list on page 1.

The red alarm LED on the sensor and the power board should latch on,

as should any accessories (i.e. RA400Z/RA100Z, RTS451/RTS151). Verify

system control panel alarm status and control panel execution of all in-

tended auxiliary functions (i.e fan shutdown, damper control, etc.).

2. The detector must be reset by the system control panel, front cover Test/

Reset button, or remote accessory.

3. To reset using the Test/Reset button on the power board cover simply

Press and release.

4. Verify airflow test per Section 7 has been performed.

[12.5.2] SMOKE RESPONSE TESTS

To determine if smoke is capable of entering the sensing chamber, visually

identify any obstructions. Plug the exhaust and sampling tube holes to pre-

vent ducted air from carrying smoke away from the detector head, then blow

smoke such as cigarette, cotton wick, or punk directly at the head to cause

an alarm. REMEMBER TO REMOVE THE PLUGS AFTER THIS TEST, OR THE

DETECTOR WILL NOT FUNCTION PROPERLY.

[12.5.3] SMOKE ENTRY USING AEROSOL SMOKE

This test is intended for low-flow systems (100-500 FPM). If the air speed is

greater than 500 FPM, use a conventional manometer to measure differential

pressure between the sampling tubes, as described in Section 7.1.

Drill a

⁄4 inch hole 3 feet upstream from the duct smoke detector. With the air

handler on, measure the air velocity with an anemometer. Air speed must be

at least 100 FPM. Spray aerosol smoke* into the duct through the

⁄4 inch hole

for five seconds. Wait two minutes for the duct smoke detector to alarm. If the

duct smoke detector alarms, air is flowing through the detector. Remove the

duct smoke detector cover and blow out the residual aerosol smoke from the

chamber and reset the duct smoke detector. Use duct tape to seal the aerosol

smoke entry hole.

*Aerosol smoke can be purchased from Home Safeguard Industries at home-

safeguard.com, model 25S Smoke Detector Tester, and Chekkit Smoke De-

tector Tester model CHEK02 and CHEK06 available from SDi. When used

properly, the canned smoke agent will cause the smoke detector to go into

alarm. Refer to the manufacturer’s published instructions for proper use of

the canned smoke agent.

CAUTION

Canned aerosol simulated smoke (canned smoke agent) formulas will vary by

manufacturer. Misuse or overuse to these products may have long term ad-

verse effects on the smoke detector. Consult the canned smoke agent manufac-

turer’s published instructions for any further warnings or caution statements.

[12.6] INSTALL THE COVER

Install the covers making sure that the cover fits into the base groove. Tighten

the seven screws that are captured in the covers.

[13] DETECTOR CLEANING PROCEDURES

Notify the proper authorities that the smoke detector system is undergoing

maintenance, and that the system will temporarily be out of service. Disable

the zone or system undergoing maintenance to prevent unwanted alarms and

possible dispatch of the fire department.

FIGURE 9. MULTIPLE FAN SHUTDOWN (INTERCONNECTION OF D4240

TO DH100ACDC):

DH100ACDC

D4240

H0617-12

H0552-12

1 2 3 4 5 6 7 8

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System-sensor D4240 User Manual Page 6

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