Carrier 48/50HG014-028- Manual

1

48/50HG014 --- 028, 48/50PG20 --- 28

Single --- Package Rooftop Units

with

COMFORT

Link

t

and Electro --- Mechanical Controls

Return and Supply Smoke Detectors Accessory

Installation Instructions

PART NO. CRSMKDET001D00, CRSMKSUP001B00, CRSMKSEN001A00

TABLE OF CONTENTS

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

Comfort

Link

t

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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.

Position No.

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

DESIGN REVISION 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 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

Comfort

Link 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).

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.
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.