INSTALLATION
When installing the smoke detector in the unit, follow all local codes. Damage to unit may result.
Check Package Contents — Remove accessory pack- aging and inspect shipment for damage. If any damage is found, file a claim with the shipping agent immediately. If any item is missing or any part does not assemble properly, notify your Carrier distributor.
Table 1 lists the accessory package contents. Figure 1 shows the smoke detector.
Table 1 — Accessory Package Contents — Return Air Smoke Detector (CRSMKDET002C00)
ITEM | QUANTITY | |
Smoke Detector with Cover | 1 | |
Sampling Tube (long) | 1 | |
Sampling Tube Filters | 2 | |
Test Magnet | 1 | |
Foam Gaskets | 2 | |
Screw, no. 6 Self Tapping | 2 | |
Tube End Plug (large) | 1 | |
Sampling Tube Support Bracket | 1 | |
Screw, | 2 | |
Screw, 1/4 | 2 | |
Snap Bushing | 1 | |
Harness Assembly | 1 | |
Smoke detector bracket 50ZZ500420 | 1 | |
Sampling tube bracket 50ZZ500421 | 1 | |
Sampling tube bracket 50ZZ500431 | 1 | |
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Return Air Smoke Detector Installation
Prior to installation of this accessory, make sure all power is disconnected to the unit and locked out. Failure to dis- connect power supply prior to servicing may result in seri- ous injury.
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 secure.
2.Find the 2 plugs located in the partition above the control box, remove and discard. See Fig. 2.
3.Remove cover from smoke detector. The screws will remain captured in the cover.
4.Place foam gaskets over each sampling tube on smoke detector. See Fig. 1.
5.Remove one knockout from top of smoke detector.
6.Insert stripped ends of wire harness through knockout and wire to smoke detector as shown in Fig. 3. Use ground screw in the smoke detector to secure a wire tie. Use wire tie to provide strain relief for the wire harness.
7.Slide smoke detector into holes in partition. Do not secure at this time.
PARTITION
SMOKE DETECTOR
MOUNTING PLUGS
PL13 |
AUXILIARY |
CONTROL PANEL |
NOTE: For horizontal applications it is easiest to install the | Fig. 2 — Smoke Detector Mounting Location for | |
smoke detector prior to making duct connections. | ||
| ||
|
FOAM
GASKETS
CONDUIT HOLES
SAMPLING TUBE
FILTERS
DETECTOR HOUSING
PLASTIC |
|
SAMPLING TUBE | TERMINAL STRIP |
| POWER BOARD |
PLASTIC SAMPLING TUBE |
|
COVER MOUNTING | |
| |
| SCREWS |
PHOTO
DETECTOR BOARD
DETECTOR COVER 
Fig. 1 — Smoke Detector
2
