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48/50A020-060
48/50Z030-105
Single-Package Rooftop Units
Accessory Return Smoke Detectors
Installation Instructions
Part No. CRSMKDET002C00
CONTENTS Follow all safety codes. Wear safety glasses and work
gloves. Use care when handling and installing the accessory.
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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INSTALLATION 48/50A Units — The return air smoke detector is to be installed in the predrilled holes located in the indoor section above the auxiliary control box. 1. Open the hinged auxiliary control box access door and When installing the smoke detector in the unit, follow all secure. local codes. Damage to unit may result. 2. Find the 2 plugs located in the partition above the control box, remove and discard. See Fig. 2. Check Package Contents — Remove accessory pack- 3. Remove cover from smo
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GROUND SMOKE SCREW DETECTOR SMOKE WIRE DETECTOR HARNESS SAMPLING TUBE SUPPORT BRACKET SAMPLING SAMPLING TUBE TUBE FILTERS Fig. 4 — Smoke Detector Installed (48/50A020-060) 21. Replace smoke detector cover. WIRE HARNESS 22. Check for alarms. Correct any problems. 23. Close and secure auxiliary control box door. 48/50Z Units — The return air smoke detector is to be installed on the upright in the power exhaust section. See PL13 Fig. 5-10. NOTE: For size 075-105 units with return fan option, the sm
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SAMPLING TUBE SAMPLING TUBE BRACKET BRACKET SMOKE SMOKE DETECTOR DETECTOR Fig. 5 — Smoke Detector for 48/50Z030-050 (No Economizer or Power Exhaust) Fig. 8 — Smoke Detector for 48/50Z055-105 (No Economizer or Power Exhaust) SAMPLING SAMPLING TUBE TUBE BRACKET BRACKET SMOKE SMOKE DETECTOR DETECTOR Fig. 6 — Smoke Detector for 48/50Z030-050 Fig. 9 — Smoke Detector for 48/50Z055-105 (Economizer Only) (Economizer Only) TUBE SAMPLING BRACKET SAMPLING TUBE BRACKET SMOKE DETECTOR SMOKE DETECTOR Fig. 1
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11. Slide sampling tube into bracket, making sure the 2. Remove and inspect sampling tube filters. sampling holes point in the opposite direction of the 3. If filters are heavily coated with dirt, replace them with return airflow. Insert the sampling tube all the way into new filters. If they are not heavily coated, use a vacuum the smoke detector. cleaner or compressed air nozzle to remove dust, then 12. Secure sampling tube to smoke detector with two no. 6 reinstall the filters. self-tapping s
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1 SMOKE RESPONSE TEST — Drill a /-in. hole 3 ft Trouble — If the detector LED does not flash, then the detec- 4 upstream from the unit smoke detector. Use the Service Test tor lacks power, the detector board is missing function (see Controls and Troubleshooting Guide for details (replace), the cover has been missing or not on Service Test) to turn on the unit indoor fan. Measure the air secured properly for more than 20 minutes (secure velocity with an anemometer. Air speed must be at least cove
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Copyright 2003 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 1 PC 111 Catalog No. 534-80157 Printed in U.S.A. Form 48/50A-5SI Pg 8 9-03 Replaces: New Tab 1a 1b
