48/50HG014-028
Single-Package Rooftop Units
Accessory Return and Supply
Smoke Detectors
Installation Instructions
Part No. CRSMKDET001C00 and CRSMKSUP001A00
CONTENTS
GENERAL
SAFETY CONSIDERATIONS
INSTALLATION
Check Package Contents
Return Air Smoke Detector Installation
Supply Air Smoke Detector Installation
Configuring the
OPERATION
MAINTENANCE
Cleaning Procedure
Filter Replacement
Board Replacement
TROUBLESHOOTING
Smoke Entry Tests
• AIRFLOW TEST
• SMOKE RESPONSE TEST
Standby, Alarm and Sensitivity Tests
• STANDBY AND TROUBLE TEST
• ALARM TESTS
• SENSITIVITY TEST
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Comfort
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5,6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . 2
. . . . . . . . . . 5
Link™ Controller
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . .7,8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . 5
. . . . . . . . . . . . . 8
GENERAL
An HVAC (heating, ventilation and air-conditioning) system 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 initiated 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 components. 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 personnel. 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.
Follow all safety codes. Wear safety glasses and work
gloves. Use care when handling and installing the accessory.
Before performing service or maintenance operations on
unit, turn off main power swit ch to unit. Electrical shock
could cause personal injury.
The National Fire Protection Association has established
that DUCT DETECTORS MUST NOT BE USED AS A
SUBSTITUTE FOR OPEN AREA DETECTOR PROTECTION as a means of providing life safety. Nor are they
a substitute for early warning in a building’s regular fire
detection system. Carrier supports this positi on and strongly
recommends that the user read NFPA Standards 90A, 72,
and 101. This smoke detector is listed per UL 2 68A.
This device will not operate without electrical power.
Fire situations may cause an interruption of power. The
system safeguards should be discussed with your local fire
protection specialist.
This device will not sense smoke unless the ventilation system is operating and the cover is installed.
For this detector to function properly, it MUST be installed
according to the instructions in this manual. Furthermore,
the detector MUST be operated within ALL e lectrical and
environmental specifications listed in this manual. Failure
to comply with these requirements may prevent the detector from activating when smoke is present in the air duct.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1144
Tab 1a1b6a6b
PC 111 Catalog No. 534-80096 Printed in U.S.A. Form 48/50HG-19SI Pg 1 2-02 Replaces: 48/50HG-17SI
INSTALLATION
When installing the smoke detector in the unit, follow all
local codes. Damage to unit may result.
Check Package Contents —
Remove accessory packaging and inspect shipment for damage. If any damage is
found, file a claim with the shipping agent immediately. If any
item is missing or any part does not assemble properly, notify
your Carrier distributor.
Tables 1A and B list the accessory package contents.
Figure 1 shows the smoke detector.
Table 1A — Accessory Package Contents —
Return Air Smoke Detector (CRSMKDET001C00)
ITEM QUANTITY
Smoke Detector with Cover
Sampling Tube (long)
Sampling Tube Filters
Test Magnet
Foam Gaskets
Screw, no. 6 Self Tapping
Tube End Plug (large)
Sampling Tube Support Bracket
Screw, 8-18
Screw,
Small Snap Bushing
Large Snap Bushing
Harness Assembly (4-Wires, short)
Wire Tie, Screw Mounted
3
/4-in. Pan Head
1
/4AB-14 5/8-in.
1
1
2
1
2
2
1
1
2
2
1
1
1
1
Table 1B — Accessory Package Contents —
Supply Air Smoke Detector (CRSMKSUP001A00)
ITEM QUANTITY
Smoke Detector with Cover
Sampling Tube (short)
Sampling Tube Filters
Test Magnet
Foam Gaskets
Tube End Plug (small)
Screw, 8-18
Small Snap Bushing
Harness Assembly (4-Wires, long)
Wire Tie, Screw Mounted
Wire Tie
Screw, no. 8 Self Tapping
Screw, no. 10
3
/4-in. Pan Head
1
1
2
1
2
1
2
1
1
5
1
1
2
Return Air Smoke Detector Installation —
The return air smoke detector is to be installed in the predrilled
holes located above compressor B1 in the electrical/
compressor section (Fig. 2).
Prior to instal lation of this access ory, make sure all power
is disconnected to the unit and locked out. Failure to disconnect power supply prior to servicing may result in serious injury.
NOTE: For horizontal applications it is easiest to install the
smoke detector prior to making duct connections.
1. Open the hinged electrical/compressor access door and
secure.
2. Find the 2 plugs located above compressor B1, remove
and discard. Cut holes in the insulation located behind the
partition.
3. Remove cover from smoke detector. The screws will
remain captured in the cover.
4. Place foam gaskets over each sampling tube on smoke
detector. (See Fig. 1.)
5. Remove one knockout from top of smoke detector.
6. Insert stripped ends of wire harness through knockout and
wire to smoke detector as shown in Fig. 3.
7. Provide strain relief for wires by attaching wire tie to
ground screw located next to the knockout in the smoke
detector. Ti ghten the wire tie.
8. Slide smoke detector into holes in partition with the
terminal block to the right. Do not secure at this time.
9. Slide sampling tube into left-hand hole of smoke detector.
It might be necessary to tilt the smoke detector upw ards
in order properly align the sampling tube.
10. Remove the unit side panel at the return end of the unit.
Save screws for use later.
11. Mount the sampling tube support bracket to the cross
member with two
1
/4AB-14 5/8-in. screws as shown
in Fig. 4. Insert large snap bushing into hole in bracket.
12. Slide sampling tube into bracket, making sure that the
sampling holes point down. Pull the sampling tube so that
it is flush with the smoke detector.
13. Return to Electrical/Compressor section and secure sampling tube to smoke detector with two no. 6 self-tapping
screws.
3
14. Attach smoke detector to partition using two, 8-18
/4-in.
pan head screws.
Do not overtighten the screws. Damage to smoke detector
may result.
15. Return to side panel and insert tube end plug into
sampling tube.
16. Replace the unit side panel.
17. Return to Electrical/Compressor section and insert
sampling tube filters into both sampling tube holders.
(See Fig. 1.)
18. Install the snap bushing in the center knockout underneath the control terminal strips located in the bottom
right-hand corner of the control box.
19. Feed wires through snap bushing and connect to appropriate terminals as shown in Fig. 3.
20. Restore power to the unit.
21. Configure ComfortLink™ controller as specified in
Configuring the ComfortLink Controller on page 5.
22. Perform Standby , Alarm, and Sensitivity Tests on page 7.
At a minimum, the Magnet test should be performed t o
verify smoke detector wiring.
23. Replace smoke detector cover.
24. Check for alarms. Correct any problems.
2
FOAM
GASKETS
PLASTIC
SAMPLING TUBE
PLASTIC SAMPLING TUBE
SELF-TAPPING SCREW
DETECTOR BOARD
DETECTOR COVER
CONDUIT HOLES
SAMPLING TUBE
FILTERS
Fig. 1 — Smoke Detector
DETECTOR
HOUSING
TERMINAL STRIP
POWER BOARD
COVER MOUNTING
SCREWS
SMOKE DETECTOR
Fig. 2 — Return Air Smoke Detector Location
3