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12. Slide sampling tube into bracket, making sure that the sampling holes point down. Pull the sampling tube so that it is flush with the smoke detector. 13. Return to Electrical/Compressor section and secure sampling tube to smoke detector with two no. 6 self-tapping screws. 14. Attach smoke detector to partition using two, 8-18 3/4-in. pan head screws. Do not overtighten the screws. Damage to smoke detector may result. 15. Return to side panel and insert tube end plug into sampling tube. 16. Replace the unit side panel. 17. Return to Electrical/Compressor section and insert sampling tube filters into both sampling tube holders. (See Fig. 1.) 18. Install the snap bushing in the center knockout underneath the control terminal strips located in the bottom right-hand corner of the control box. 19. Feed wires through snap bushing and connect to appropriate terminals as shown in Fig. 3. 20. Restore power to the unit. 21. Configure ComfortLink™ controller as specified in Configuring the ComfortLink Controller on page 5. 22. Perform Standby, Alarm, and Sensitivity Tests on page 7. At a minimum, the Magnet test should be performed to verify smoke detector wiring. 23. Replace smoke detector cover. 24. Check for alarms. Correct any problems. 2 3 FOAM GASKETS CONDUIT HOLES DETECTOR HOUSING TERMINAL STRIP POWER BOARD COVER MOUNTING SCREWS FILTERS SAMPLING TUBE DETECTOR BOARD DETECTOR COVER PLASTIC SAMPLING TUBE PLASTIC SAMPLING TUBE SELF-TAPPING SCREW SMOKE DETECTOR Fig. 1 — Smoke Detector Fig. 2 — Return Air Smoke Detector Location 4 Fig. 3 — Return Air Smoke Detector Wiring SAMPLING TUBE SUPPORT BRACKET Fig. 4 — Sampling Tube Support Bracket Supply Air Smoke Detector Installation — The supply air smoke detector is to be installed in the pre- drilled holes located on the front of the first indoor blower (Fig. 5). Prior to installation of this accessory, make sure all power is disconnected to the unit and locked out. Failure to disconnect power supply prior to servicing may result in serious injury. 1. Open the indoor fan access door and secure. 2. Open the hinged electrical/compressor access door and secure. 3. Disconnect wires located on the left-hand side of the fan deck. On 48HG units, the indoor fan plug and the limit switch quick connects must be disconnected. On 50HG units, 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. 5. Remove cover from smoke detector. The screws will remain captured in the cover. 6. Place foam gaskets over each sampling tube on smoke detector. See Fig. 1. 7. Remove one knockout from top of smoke detector. 8. Insert stripped ends of wire harness through knockout and wire to smoke detector as shown in Fig. 6. 9. Provide strain relief for wires by attaching wire tie to ground screw located next to the knockout in the smoke detector. Tighten wire tie. 10. Secure sampling tube in inlet closest to the smoke detector electronics using the no. 8 self-tapping screw provided. See Fig. 1 for an example on how to connect a sampling tube. Be sure to connect the sampling tube to the middle hole. Insert plug into the end of the sampling tube. 11. Slide smoke detector into holes in partition with the terminal block at the top and secure using two, 8-18 3/4-in. pan head screws. Do not overtighten screws. Damage to smoke detector may result. 12. Insert sampling tube filters into both sampling tube holders. See Fig. 1. 13. Remove and save the two screws securing the indoor fan sled to the unit. 14. Slide the indoor fan sled out until the back side of the first blower is accessible. 15. Attach wire harness to fan side plate using the 4 screw wire ties and no. 10 screws provided. See Fig. 5 for clarification. 16. Slide in the indoor fan deck and secure using screws saved from Step 13. 17. Attach wire harness to top of Circuit C filter drier (and point B if two circuits) in Fig. 5, using wire tie provided. Make sure that the wire harness is tight. 18. In the Electrical/Compressor section, install snap bushing in the center knockout underneath the terminal strips located in the bottom right-hand corner of the control box. 19. Route wires from the filter drier to the control box. Wires should follow existing wires through grommet located on top of the filter section, down the outside of the control box and through the snap bushing. See Fig. 5 and 6. 20. Connect wires to terminal strips as shown in Fig. 5 and 6. 21. Restore power to the unit. 22. Configure ComfortLink™ controller as specified in Configuring the ComfortLink Controller below. 23. Perform Standby, Alarm, and Sensitivity Tests on page 7. At a minimum, the Magnet test should be performed to verify smoke detector wiring. 24. Turn off power to the unit. 25. Replace smoke detector cover. Do not overtighten screws. 26. Reconnect the indoor fan plug and the limit switch wires if applicable. 27. Close...
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