Installation Instructions
Part No. CRSMKDET001C00 and CRSMKSUP001A00
Follow all safety codes. Wear safety glasses and work
gloves. Use care when handling and installing the accessory.
CONTENTS
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Check Package Contents. . . . . . . . . . . . . . . . . . . . . . . . . 2
Return Air Smoke Detector Installation. . . . . . . . . . . 2
Supply Air Smoke Detector Installation . . . . . . . . . . 5
Configuring the ComfortLink™ Controller. . . . . . . . 5
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5,6
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Filter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Board Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
The National Fire Protection Association has established
that DUCT DETECTORS MUST NOT BE USED AS A
SUBSTITUTE FOR OPEN AREA DETECTOR PRO-
TECTION as a means of providing life safety. Nor are they
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .7,8
Smoke Entry Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
• AIRFLOW TEST
• SMOKE RESPONSE TEST
Standby, Alarm and Sensitivity Tests. . . . . . . . . . . . . 8
• STANDBY AND TROUBLE TEST
• ALARM TESTS
• SENSITIVITY TEST
GENERAL
An HVAC (heating, ventilation and air-conditioning) sys-
tem supplies conditioned air to virtually every area of a
building. Smoke introduced into this air duct system will be
distributed throughout the entire building. Smoke detectors
designed for use inside the unit are used to sense the presence
of smoke passing through the unit.
The smoke detector utilizes photoelectric technology for the
detection of smoke. This detection method, when combined
with an efficient ducting design, samples air passing through
the unit. If sufficient smoke is sensed, an alarm signal is initiat-
ed and the ComfortLink controls will shut down the unit. With
the unit shut down, the unit will not blow toxic smoke and fire
gases throughout the areas served by the duct system.
The return air smoke detector is part number
CRSMKDET001C00. The supply air smoke detector is part
number CRSMKSUP001A00.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform the basic maintenance
functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service per-
sonnel. When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to the unit,
and other safety precautions that may apply.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111 Catalog No. 534-80096 Printed in U.S.A. Form 48/50HG-19SI Pg 1 2-02 Replaces: 48/50HG-17SI
Book 1
1
4
4
Tab 1a 1b 6a 6b
FOAM
GASKETS
CONDUIT HOLES
DETECTOR
HOUSING
SAMPLING TUBE
FILTERS
PLASTIC
SAMPLING TUBE
TERMINAL STRIP
POWER BOARD
PLASTIC SAMPLING TUBE
SELF-TAPPING SCREW
COVER MOUNTING
SCREWS
DETECTOR BOARD
DETECTOR COVER
Fig. 1 — Smoke Detector
SMOKE DETECTOR
Fig. 2 — Return Air Smoke Detector Location
3
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Fig. 3 — Return Air Smoke Detector Wiring
SAMPLING TUBE
SUPPORT BRACKET
Fig. 4 — Sampling Tube Support Bracket
4
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Supply Air Smoke Detector Installation —
The supply air smoke detector is to be installed in the pre-
drilled holes located on the front of the first indoor blower
(Fig. 5).
1. Open the indoor fan access door and secure.
2. Open the hinged electrical/compressor access door and
secure.
3. Disconnect wires located on the left-hand side of the fan
deck. On 48HG units, the indoor fan plug and the limit
switch quick connects must be disconnected. On 50HG
units, only the indoor fan plug must be disconnected.
4. Find the 2 plugs located in the blower side plate. Remove
the plugs and discard. It will be necessary to remove
some of the tape holding the plugs in place.
5. Remove cover from smoke detector. The screws will
remain captured in the cover.
6. Place foam gaskets over each sampling tube on smoke
detector. See Fig. 1.
7. Remove one knockout from top of smoke detector.
8. Insert stripped ends of wire harness through knockout and
wire to smoke detector as shown in Fig. 6.
9. Provide strain relief for wires by attaching wire tie to
ground screw located next to the knockout in the smoke
detector. Tighten wire tie.
10. Secure sampling tube in inlet closest to the smoke detec-
tor electronics using the no. 8 self-tapping screw provid-
ed. See Fig. 1 for an example on how to connect a sam-
pling tube. Be sure to connect the sampling tube to the
middle hole. Insert plug into the end of the sampling tube.
11. Slide smoke detector into holes in partition with the ter-
minal block at the top and secure using two, 8-18 3/4-in.
pan head screws.
12. Insert sampling tube filters into both sampling tube
holders. See Fig. 1.
13. Remove and save the two screws securing the indoor fan
sled to the unit.
14. Slide the indoor fan sled out until the back side of the first
blower is accessible.
15. Attach wire harness to fan side plate using the 4 screw
5
USE #10 SCREWS
PROVIDED TO
ATTACH WIRE TIES
ROUTE WIRES
AS SHOWN
SUPPLY
SMOKE
DETECTOR
SUPPLY FAN,
VIEW FROM
INSIDE UNIT
Fig. 5 — Supply Smoke Detector Location and Wire Routing
Fig. 6 — Supply Smoke Detector Wiring
6
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MAINTENANCE
Cleaning Procedure — 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.
AIR FILTERS
1. Turn off power to the system.
2. Remove and inspect sampling tube filters.
3. If filters are heavily coated with dirt, replace them with
new filters. If they are not heavily coated, use a vacuum
cleaner or compressed air nozzle to remove dust, then
reinstall the filters.
PHOTO DETECTOR BOARD
1. Remove the screen by gently grasping on each side and
pulling straight off.
2. Lift the photo chamber in the same fashion. Vacuum the
screen and cover. Use clean, compressed air to loosen and
blow out any remaining debris.
3. Vacuum photo chamber, then use clean compressed air to
blow area clean.
4. Replace the chamber by pressing it onto the base. Press
the screen into place. It should fit tightly on the chamber.
Filter Replacement — The filters do not substantially
affect smoke detector performance even when up to 90% of the
filter is clogged. Quarterly visual inspection usually suffices to
determine whether the filters should be replaced. Only a high
percentage of contamination affects performance. If further
testing is required, compare differential pressure readings with
and without the filters installed. If the difference exceeds 10%,
then replace the filters. The pressure differential should never
fall below 0.0015 in. wg.
Board Replacement
SMOKE DETECTOR BOARD REPLACEMENT
1. Remove the two detector board mounting screws.
2. Pull gently on the board to remove it.
3. To replace the board, align the board mounting features,
holes, and the interconnect terminals. Push the board into
7
ALARM TESTS
Magnet Test
1. Place the painted surface of the magnet onto the TEST
locator on the bottom of the housing.
Standby, Alarm and Sensitivity Tests — The cov-
er of the smoke detector must be removed to perform these
tests.
STANDBY AND TROUBLE TEST
Standby — Look for presence of flashing green LED.
The LED should flash approximately every
10 seconds.
Trouble — If the detector LED does not flash, then the detec-
tor lacks power (check TB4), the detector board is
missing (replace), the cover has been missing or
not secured properly for more than 20 minutes
(secure cover properly), or the unit is defective
(return for repair).
2. The red alarm LED on the detector should switch on.
Verify system control panel alarm status and control
panel execution of all intended auxiliary functions
(i.e., fan shutdown, damper control, etc.).
3. The detector must be reset by the front cover reset button.
SENSITIVITY TEST — After verification of alarm capabili-
ty, use a field-supplied voltmeter to check detector sensitivity.
The housing cover must be removed to perform this test. If
readings indicate that the detector head is outside of the accept-
able range that is printed on the label of the detector, the detec-
tor chamber requires cleaning.
Test —
The trouble condition can be caused intentionally
to verify correct operation of the system. Remove
the detector board to cause an alarm.
Cover
Tamper — If the cover is removed or not properly secured for
a period longer than 20 minutes, a trouble signal is
generated to indicate the cover is missing.
Copyright 2002 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111 Catalog No. 534-80096 Printed in U.S.A. Form 48/50HG-19SI Pg 8 2-02 Replaces: 48/50HG-17SI
Book 1
1
4
4
Tab 1a 1b 6a 6b
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