Carrier 48/50A020-060 Installation Instructions Manual

CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Check Package Contents. . . . . . . . . . . . . . . . . . . . . . . . . 2
Return Air Smoke Detector Installation. . . . . . . . . . . 2
48/50A Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
48/50Z Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Configuring the ComfortLink™ Controller. . . . . . . . 5
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Filter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Board Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .5,6
Smoke Entry Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
• AIRFLOW TEST
• SMOKE RESPONSE TEST
Standby, Alarm and Sensitivity Tests. . . . . . . . . . . . . 6
• STANDBY AND TROUBLE TEST
• ALARM TEST
• 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.

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
Book 1 1
Tab 1a 1b

Installation Instructions

Part No. CRSMKDET002C00
Catalog No. 534-80157 Printed in U.S.A.
Single-Package Rooftop Units
Accessory Return Smoke Detectors
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 switch 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 PRO-
TECTION 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 position and strongly
recommends that the user read NFPA Standards 90A, 72,
and 101. This smoke detector is listed per UL 268A.
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 sys-
tem 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 electrical and
environmental specifications listed in this manual. Failure
to comply with these requirements may prevent the detec-
tor from activating when smoke is present in the air duct.
Form 48/50A-5SI Pg 1
48/50A020-060
48/50Z030-105
9-03 Replaces: New