48/50HG014---028, 48/50PG20---28
Single---Package Rooftop Units
with COMFORTLinkt and Electro---Mechanical Controls
Return and Supply Smoke Detectors Accessory
Installation Instructions
PART NO. CRSMKDET001D00, CRSMKSUP001B00, CRSMKSEN001A00
TABLE OF CONTENTS
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.
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Check Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Return Air Smoke Detector Installation . . . . . . . . . . . . . . . 2
Supply Air Smoke Detector Installation . . . . . . . . . . . . . . . 5
Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Configuring the ComfortLinkt Controller . . . . . . . . . . . . 8
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recommended Service Schedule . . . . . . . . . . . . . . . . . . . . 9
Sensor Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Controller Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dirty LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Trouble LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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
CRSMKDET001D00, which includes a Smoke Sensor and a
Smoke Control Module combined with sampling tube, harnesses
and hardware. The supply air smoke detector is part number
CRSMKSUP001B00, which includes a Smoke Sensor and a
Smoke Control Module combined with sampling tube, harnesses
and hardware. Part number CRSMKSEN001A00 is a Smoke
Sensor only for use as a second (Supply with existing Return, or
Return with existing Supply) Air Smoke Detector with sampling
tube, harnesses and hardware.
The Control Module can be attached to a Smoke Sensor and
installed as an assembled unit, or it can be installed separate from
a sensor. One Controller can be used to control up to two
detectors (Smoke Sensors).
IMPORTANT: There are two different design revision 48/50HG
units that have been produced. Because of these differences, there
are two different versions of this accessory. This accessory
literature covers accessories manufactured for units with design
revision 1. This revision designator is found in the 13th digit of
the unit model 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.
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.
DESIGN REVISION NUMBER
Position No.
Example:
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
4
8
H
G
D
0
1
6
A
A
C
6
1
1
A
A
Follow all safety codes. Wear safety glasses and work gloves. Use
care when handling and installing the accessory.
Recognize safety information. This is the safety--alert symbol
. When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
C07172
Fig. 1 --- Model Number Chart
1
Exhaust tube
Plug
Conduit nuts
( field supplied )
Rubber gasket
Sensor housing
and electronics
Sampling tube
Collar
Conduit support plate
Rubber
gasket
Terminal block cover
Cover gasket
(ordering option)
Cover gasket
(ordering option)
Controller housing
and electronics
Controller cover
Conduit couplings
( field supplied )
LEDs
Alarm
Trouble
Power
Sensor cover
Fastener
(2X)
Smoke Sensor
LEDs
Power
Dirty
Trouble
Alarm
Smoke Control Module
C07173
Fig. 2 --- Smoke Detector
SMOKE CONTROL MODULE
PLUG LOCATION
RETURN SMOKE SENSOR
C1/B1
B1/A2
A1
C07174
Fig. 3 --- Return Air Smoke Detector Location
3. Remove cover from smoke detector. The screws will
remain captured in the cover.
4. Slide exhaust tube into the sensor. The exhaust tube
should be inserted from the back of the sensor, into the
hole with four slots, and locked into place. (See Fig. 2.)
5. Slide smoke detector into holes in partition with the ter-
minal block to the right. Do not secure at this time.
6. Slide the sampling tube collar over the sampling tube un-
til the tabs lock into the tube. (See Fig. 2.)
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury and/or death.
Prior to installation of this accessory, make sure all
power is disconnected to the unit and locked out and
tagged.
7. Slide long sampling tube (P/N RN20ZT060) into left--
hand hole of smoke detector. It might be necessary to tilt
the smoke detector upwards in order to properly align the
sampling tube, making sure that the sampling holes
point DOWN. (See Fig. 4.)
8. Install plug into far end of sampling tube.
9. Remove the unit side panel at the return end of the unit.
Save screws for use later.
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/A2,
remove and discard. Cut holes in the insulation located be-
hind the partition.
3
10. Mount the sampling tube support bracket to the
cross member with two 1/4AB-14 5/8-in. screws
(P/N AL48AM307) as shown in Fig. 5. Insert large snap
bushing (P/N HY93NH085) into hole in bracket.
NOTE: This step is not needed with 48/50PG Humidi--MiZert
units because they have plug 19 harness already installed in the
control box. The harness assembly part number 50TG403507
that came with the accessory is not used. Factory installed PL--19
can be located outside the contol box by its appropriate label. For
Humidi--MiZer smoke detector wiring refer to Fig. 8.
11. Slide sampling tube into bracket. (See Fig. 4.) Pull the
sampling tube so that the locking collar snaps into the
smoke detector.
12. Attach smoke detector to partition using two, 8-18 3/4-in.
pan head screws (P/N AL56AU168).
16. Connect PL-19 from the smoke detector control module to
the PL-19 on the control box harness installed in Step 15.
NOTE: On 48PG Humidi--MiZer units the control box harness
has a jumper plug attached. This needs to be disconnected so
PL--19 from the smoke detector can be snaped in.
!
CAUTION
17. Restore power to the unit.
EQUIPMENT DAMAGE HAZARD
18. Configure ComfortLink controller as specified in
figuring the ComfortLink Controller.
Con-
Failure to follow this caution may result in equipment
damage.
19. Perform Sensor and Controller tests. At a minimum, the
Magnet test should be performed to verify smoke detector
wiring.
Do not overtighten the screws.
13. Replace the unit side panel.
20. Replace smoke detector cover.
14. Install the snap bushing (P/N HY93NH069) in the center
knockout underneath the control terminal strips located in
the bottom right-hand corner of the control box.
21. Check for alarms. Correct any problems.
15. Feed wires through snap bushing and connect to appropri-
ate terminals as shown in Fig. 6 for ComfortLinkt units
or Fig. 7 for Electro--Mechanical units.
INSTALL SUPPLY SENSOR TUBE
WITH HOLES POINTING
UP
INSTALL RETURN SENSOR TUBE
WITH HOLES POINTING
DOWN
INSTALL RETURN EXHAUST
TUBE HERE
BUSHING
BRACKET
C07175
Fig. 4 --- Supply and Return Sensor Tube
4
SAMPLING TUBE
SUPPORT BRACKET
C07176
Fig. 5 --- Sampling Tube Support Bracket
PL19
CUT OFF CONNECTOR, LABELED TB3-5, ON ORN WIRE
C07177
Fig. 6 --- Return and Supply Air Smoke Detector Wiring on ComfortLink Units
1. Open the indoor fan access door and secure.
Supply Air Smoke Detector Installation
(CRSMKSUP001D00)
2. Open and secure hinged electrical/compressor access door.
3. Disconnect wires located on the right-hand side of the fan
deck. On gas heat units, the indoor fan plug and the limit
switch quick connects must be disconnected. On units
without gas heat, 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.
The supply air smoke detector is to be installed in the predrilled
holes located on the front of the first indoor blower. (See Fig. 9.)
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury and/or death.
5. Remove cover from smoke detector. The screws will
remain captured in the cover.
Prior to installation of this accessory, make sure all
power is disconnected to the unit and locked out and
tagged.
5
C07178
Fig. 7 --- Smoke Detector Wiring on Electro--Mechanical Control Units
C07179
Fig. 8 --- 48/50PG Humidi--MiZert Smoke Detector Wiring
6
6. Slide the sampling tube collar over the sampling tube
until the tabs lock into the tube.
7. Slide sampling tube into smoke detector with eight slots.
20. Route cable from supply smoke sensor, along the outside
of the control box, through the control module knockout
and connect to the J1 RJ-45 connector.
Make sure sampling tube holes are aligned facing UP.
8. Insert plug into far end of the sampling tube.
21. Using wire ties, secure the wiring so it does not interfere
with unit operation.
22. Replace control module cover.
23. Restore power to the unit.
9. Place rubber gaskets over each sampling tube on smoke
detector. (See Fig. 2.)
10. Remove one knockout from top of smoke detector.
24. Configure ComfortLink controller as specified in Config-
uring the ComfortLink Controller below.
11. Insert one end of RJ-45 wire harness through knockout
and wire to smoke detector as shown in Fig. 10.
12. Slide smoke detector into holes in fan side plate with
25. Perform Sensor and Controller tests. At a minimum, the
Magnet test should be performed to verify smoke detector
wiring.
the terminal block at the top and secure using two,
3
8-18 / -in. pan head screws (P/N AL56AU168). Replace
26. Turn off power to the unit.
4
cover.
27. Reconnect the indoor fan plug and the limit switch wires if
applicable.
!
28. Close the indoor fan section door.
CAUTION
29. Restore power to the unit and check for alarms. Correct
any problems encountered.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
30. Close Electrical/Compressor section door.
Sensor Installation (CRSMKSEN001A00)
When adding return smoke sensor to previously installed supply
smoke detector:
Do not overtighten the screws.
13. Attach cable to fan side plate using snap-in wire ties.
See Fig. 9 for clarification. Secure to center post.
1. Open electrical/compressor section access door/panel.
14. Secure cable to back side of cable tray using three snap-in
wire ties.
2. Disconnect PL-19 from control module to terminal strip
by separating plug connectors.
15. In the Electrical/Compressor section, install snap bushing
in the center knockout underneath the terminal strips lo-
cated in the bottom right-hand corner of control box.
3. Remove control module cover. Disconnect supply sensor
RJ-45 wire from control module.
4. Remove three screws attaching control module to com-
pressor partition and save screws for later use.
16. Connect wires to terminal strips as shown in Fig. 6 for
ComfortLinkt units or Fig. 7 for Electro--Mechanical
Units.
5. Remove control module from unit.
6. Slide feet of control module into receptacle on the return
sensor housing and secure from the backside using one
screw removed in Step 4. The J1 RJ-45 connector on sen-
sor should be nearest the control module. Knockout holes
should align. (See Fig. 11.)
NOTE: This step is not needed with 48/50PG Humidi--MiZert
units because they have plug 19 harness already installed in the
control box. The harness assembly part number 50TG403507
that came with the accessory is not used. Factory installed PL--19
can be located outside the contol box by its appropriate label. For
Humidi--MiZer smoke detector wiring refer to Fig. 8.
7. Route short RJ-45 wire from J1 connector of sensor,
through knockout holes, and connect to J1 connector of
control module.
17. Remove cover from control module and remove knockout
from side of module nearest the RJ-45 connector.
8. Follow steps 2-20 of instructions for installing return
smoke detector.
3
18. Using
three
8-18 / -in.
pan
head
screws
4
(P/N AL56AU168) screws, secure control module to com-
pressor partition above compressor B1/A2 location.
IMPORTANT: Step 15 requires connecting the supply smoke
sensor RJ--45 wire to connector J2 in the control module.
19. Connect PL-19 from control module to PL-19 from wir-
ing harness installed in Step 16.
When adding supply smoke sensor to previously installed return
smoke detector:
Follow steps 1-14 and 19-29 from supply smoke detector
installation instructions.
NOTE: On 48PG Humidi--MiZer units, the control box harness
has a jumper plug attached. This needs to be disconnected so
PL--19 from the smoke detector can be snapped in.
7
SMOKE DETECTOR
WIRE TIES
C07180
Fig. 9 --- Supply Smoke Detector Location and Wire Routing (Top View)
RJ-45 HARNESS
INSTALL CONTROL
MODULE HERE
USING THREE SCREWS
CUT TAPE BEFORE
INSERTING SMOKE DETECTOR.
ROUTE RJ-45 HARNESS ALONG
SMOKE POWER HARNESS
THRU BOX, AND OUT
AS SHOWN TO
SUPPLY SMOKE DETECTOR
PUNCH OUT KNOCK OUT
PLUG
C07181
Fig. 10 --- Supply Control Module Installation (Side View)
Configuring the ComfortLinkt Controller
OPERATION
Configuration settings for the ComfortLink controller are
changed by using the Scrolling Marquee display. A password
may be required to edit the configurations, depending on the
previous settings configured in the unit. Default password is
“1111.” Use the arrow keys to scroll the red LED on the display
!
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage to the
unit.
to the “Configuration” position and press
through the menu until UNIT is found and press
. Scroll
ENTER
. After
ENTER
reaching the UNIT sub-menu, scroll to FS.SW (Fire Shutdown
Input) and press twice, change the value to 1 (Normal
The smoke detector must be tested and maintained regularly
following NFPA 72 requirements. The smoke detector
should be cleaned at least once a year.
ENTER
Open) with the arrow keys, press
ESCAPE
again. Press
ENTER
three times to return to the top level of the menu.
Additional information about changing configurations can be
found in the Control and Troubleshooting Guide for 48/50HG
and 48/50PG units.
8
The smoke detector contains a photoelectric detector approved
for an extended air speed range of 100 to 4000 feet per minute
and an operational temperature range of -4_ to 158_F. Do not
operate the smoke detector out of these ranges.
The smoke detector operates on 24 vac, 120 vac, or
220/240 vac. The thermostat power terminals on the unit are used
to power the smoke detector.
The cover of the controller contains the Alarm, Trouble, Dirty
and Power LEDs. The cover of the sensor contains the Alarm,
Trouble and Power LEDs. (See Fig 2.)
3. Squeeze the retainer clips on both sides of the optic hous-
ing then lift the housing away from the printed circuit
board.
4. Gently remove dirt and debris from around the optic plate
and inside the optic housing.
5. Replace the optic housing and sensor cover.
6. Connect power to the duct detector then perform a sensor
alarm test.
Recommended Service Schedule
S
Visually inspect each sensor connected to the controller
upon installation and once every 6 months thereafter.
The smoke detector can be reset by a momentary power
interruption, by the reset button on the front cover, by the control
panel, or by the remote reset accessory.
S
Perform a sensor alarm test on each sensor connected
to the controller upon installation and once every
12 months thereafter.
CONTROL MODULE
RETURN SENSOR
J1
J1
S
Perform a sensor dirty test upon installation and once
every 6 months thereafter or more frequently, as
conditions warrant.
J2
E
S
Sensor Tests
Sensor Alarm Test
The sensor alarm test checks a sensor’s ability to signal an alarm
state. This test requires the use of a SD-MAG test magnet.
CONTROL MODULE
RETURN SENSOR
J1
J1
IMPORTANT: This test places the duct detector into the alarm
state. Unless part of the test, disconnect all auxiliary equipment
from the controller before performing the test. If duct detector is
connected to a fire alarm system, notify the proper authorities
before performing the test.
J2
E
S
SECURE FROM BEHIND
WITH SCREW
To perform a sensor alarm test:
TERMINAL STRIP
1. Hold the test magnet where indicated on the side of the
sensor housing for seven seconds. Verify that the sensor’s
Alarm LED turns on.
C07182
Fig. 11 --- Sensor Installation
2. Reset the sensor by holding the test magnet against the
sensor housing for two seconds. Verify that the sensor’s
Alarm LED turns off.
HVAC duct
Sampling
tube
Sensor Dirty Test
Sensor
housing
The sensor dirty test provides an indication of the sensor’s ability
to compensate for gradual environmental changes. A sensor that
can no longer compensate for environmental changes is
considered 100% dirty and requires cleaning or replacing. This
test requires the use of a SD-MAG test magnet.
Optic
plate
Airflow
To perform a sensor dirty test, hold the test magnet where
indicated on the side of the sensor housing for seven seconds.
Verify that the sensor’s Dirty LED flashes.
Retainer
clip
IMPORTANT: Holding the test magnet against the sensor
housing for longer than 7 seconds will put the duct detector into
the alarm state and activate all automatic alarm responses.
Optic
housing
C07183
The sensor’s Dirty LED indicates the results of the dirty test as
shown below.
Fig. 12 --- Sensor Cleaning Diagram
FLASHES
DESCRIPTION
0 to 25% dirty. This is typical on a newly installed duct
MAINTENANCE
1
detector.
IMPORTANT: 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.
2
3
4
26 to 50% dirty
51 to 75% dirty
76 to 99% dirty
Controller Tests
Controller Alarm Test
Cleaning Procedure
The controller alarm test checks the controller’s ability to initiate
and indicate an alarm state.
IMPORTANT: This test places the duct detector into the alarm
state. Unless part of the test, disconnect all auxiliary equipment
from the controller before performing the test. If duct detector is
connected to a fire alarm system, notify the proper authorities
before performing the test.
1. Disconnect power from the duct detector then remove the
sensor’s cover.
2. Using a vacuum cleaner, clean compressed air, or a soft
bristle brush, remove loose dirt and debris from inside the
sensor housing and cover. (See Fig 12.)
Use isopropyl alcohol and a lint-free cloth to remove dirt
and other contaminants from the gasket on the sensor’s
cover.
9
To perform a controller alarm test:
2. Verify that power is applied to the controller’s supply in-
put terminals. If power is not present, replace or repair wir-
ing as required.
1. Press the controller’s test/reset switch for seven seconds.
Verify that the controller’s Alarm LED turns on.
Trouble LED
Controller’s Trouble LED is On
2. After performing a controller alarm test, reset the sensor
by pressing the test/reset switch for two seconds. Verify
that the controller’s Alarm LED turns off.
1. Check the Trouble LED on each sensor connected to the
controller. If a sensor’s Trouble LED is on, determine the
cause and make the necessary repairs.
2. Check the wiring between the sensor and the controller. If
wiring is loose or missing, repair or replace as required.
Controller Dirty Test
The controller dirty test checks the controller’s ability to initiate a
sensor dirty test and indicate its results.
To perform a sensor dirty test, press the controller’s test/reset
switch for two seconds. Verify that the controller’s Trouble LED
flashes.
Controller’s Trouble LED is Flashing
1. One or both of the sensors is 100% dirty. Determine which
sensor’s Dirty LED is flashing.
TROUBLESHOOTING
2. Clean the sensor assembly as described in Cleaning
Procedure.
Dirty LED
Sensor’s Dirty LED is Flashing
Clean the sensor assembly as described in Cleaning Procedure.
Power LED
Sensor’s Trouble LED is On
1. Check the sensor’s Dirty LED. If it is flashing, the sensor
is dirty and must be cleaned.
2. Check the sensor’s cover. If it is loose or missing, secure
the cover to the sensor housing.
Sensor’s Power LED is OFF
1. Check the controller’s Power LED. If it is off, determine
why the controller does not have power and make the
necessary repairs.
3. Replace sensor assembly.
Sensor’s Trouble LED is On But Controller’s Trouble LED is
Off
2. Check the wiring between the sensor and the controller. If
wiring is loose or missing, repair or replace as required.
Remove JP1 on the controller.
Controller’s Power LED is OFF
1. Make sure the circuit supplying power to the controller is
operational. If not, make sure JP2 and JP3 are set correctly
on the controller before applying power.
Printed in U.S.A.
Edition Date:7/07
Copyright 2007 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231
Catalog No:48/50H,P---24SI
Replaces:48/50H,P---10SI
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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