1
48/50HG014---028, 48/50PG20 ---28
Single---Package Rooftop Units
with COMFORTLinktand Electro---Mechanical Controls
Return and Supply Smoke Detectors Accessory
Installation InstructionsPARTNO. CRSMKDET001D00, CRSMKSUP001B00, CR SMKSEN001A00
TABLE OF CONTENTS
GENERAL 1........................................
SAFETY CONSIDERATIONS 1........................
INSTALLATION 2...................................
Check Package Conten ts 2...........................
Return Air Smoke Detector Installatio n 2...............
SupplyAir Smoke Detector Installation 5...............
Sensor Installation 7...............................
Configuringthe ComfortLinktController 8............
OPERATION 8......................................
MAINTENANCE 9...................................
Cleaning Procedure 9..............................
RecommendedService Schedule 9....................
SensorTests 9....................................
Controller Tests 9..................................
TROUBLESHOOTING 10.............................
DirtyLED 10....................................
PowerLED 10....................................
TroubleLED 10..................................
IMPORTANT:There are two di fferent design revision 48/50H G
units that have been prod uced. Because of these differences, there
are two different versions of this accesso ry. This accessory
literature covers accessories manufactured for u nits with design
revision1. This revision designatoris found in the 13th digit of
the unitmodel number located on the units’rating plate. Design
revision 0 units are not covered in this accessory book.
To determine the design revision, refer to the full unit model
number.See Fig. 1 for an example of an HG model number.The
design revision number in the model number nomenclature is
located in position 13.
PositionNo. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Example: 4 8 H G D 0 1 6 A A C 6 1 1 A A
DESIGNREVISION NUMBER
C07172
Fig. 1 --- Model Number Chart
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 theentire building. Smoke detectorsdesigned for use
inside the unit areused to sense the presence of smoke passing
through theunit.
The smoke detector utilizes photoelectric technology for the
detectionof smoke. This detectionmethod, when combined with
an efficientducting design, samplesair passing throughthe unit.
If sufficient smoke is sensed, an alarm signal is initiated and the
ComfortLinkcontrols will shut down the unit. Withthe unit shut
down, the unit will not blow toxic smoke and fire gases
throughoutthe areas served by the duct system.
The return air smoke detector is part number
CRSMKDET001D00, which includes a Smoke Sensor and a
Smoke Control Modulecombined with sampling tube, harnesses
and hardware. The supply air smoke detector is part number
CRSMKSUP001B00, which includes a Smoke Sensor and a
Smoke Control Modulecombined with sampling tube, harnesses
and hardware. Part number CRSMKSEN001A00 is a Smoke
Sensor onlyfor use as a second (Supply withexisting Return, or
Return withexisting Supply) Air Smoke Detectorwith sampling
tube,harnesses and hardware.
The Control Module can be attached to a Smoke Sensor and
installed as an assembled unit, or itcan b einstalled sep aratefrom
a sensor. One Controller can be used to control up to two
detectors(Smoke Sensors).
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment canbe
hazardous due to system pressure and electrical components.
Onlytrained and qualifiedservice personnelshould install, repair,
or serviceair-conditioningequipment.
Untrainedpersonnel can performthe basic maintenancefunctions
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.
Followall safety codes.Wear safetyglasses and work gloves.Use
care when handling and installing the accessory.
Recognize safety information. This is the safety--alert symbol
. Whenyou see this symbol on the unitand in instructionsor
manuals,be alert to the potentialfor personal injury.