Completing Installation Of Return Air Smoke; Detector; Fiop Smoke Detector Wiring And Response - Carrier WeatherMaster 48HC04 Service And Maintenance Instructions

Fig. 39 — Return Air Sampling Tube Location
(View reoriented to show opposite side for clarity)

Completing Installation of Return Air Smoke

Detector

Use the following steps to complete the installation of the return
air smoke detector.
1. Unscrew the two screws holding the return air sensor
detector plate (see Fig. 40). Save the screws.
2. Remove the return air smoke sensor module and its detec-
tor plate.
3. Rotate the detector plate so the sensor is facing outwards
and the sampling tube connection is on the bottom (see
Fig. 41).
4. Screw the sensor and detector plate into its operating posi-
tion using screws from Step 1. Ensure the sampling tube
connection is on the bottom and the exhaust tube is on the
top.
5. Connect the flexible tube on the sampling inlet to the sam-
pling tube on the basepan.
6. For units with an economizer, the sampling tube is inte-
grated into the economizer housing, but connecting the
flexible tubing to the sampling tube is the same.
Fig. 40 — Return Air Smoke Detector Module
Shipping Position
RETURN AIR
SAMPLING TUBE
FLEXIBLE EXHAUST
TUBES
SCREWS
SAMPLE TUBE
RETURN AIR SENSOR
(Operating Position Shown)
Fig. 41 — Return Air Sensor Operating Position

FIOP Smoke Detector Wiring and Response

ALL UNITS
FIOP smoke detector is configured to automatically shut down all
unit operations when a smoke condition is detected. See Fig. 42
for smoke detector wiring.
HIGHLIGHT A
JMP 3 is factory-cut, transferring unit control to smoke detector.
HIGHLIGHT B
Smoke detector NC contact set will open on smoke alarm condi-
tion, de-energizing the ORN conductor.
HIGHLIGHT C
24-v power signal using the ORN lead is removed at the Smoke
Detector input on CTB; all unit operations cease immediately.
PREMIERLINK™ AND RTU-OPEN CONTROLS
Unit operating functions (fan, cooling and heating) are terminated
as described in this section.
HIGHLIGHT D
On smoke alarm condition, the smoke detector NO Alarm contact
will close, supplying 24-v power to GRA conductor.
HIGHLIGHT E
GRA lead at Smoke Alarm input on CTB provides 24-v signal to
FIOP DDC control.
PREMIERLINK
This signal is conveyed to PremierLink FIOP's TB1 at terminal
TB1-6 (BLU lead). This signal initiates the FSD sequence by the
PremierLink control. FSD status is reported to connected CCN
network.
RTU-OPEN
The 24-v signal is conveyed to RTU-OPEN-J1-10 input terminal.
This signal initiates the FSD sequence by the RTU-OPEN control.
FSD status is reported to connected BAS network.
USING REMOTE LOGIC
Five conductors are provided for field use (see Highlight F in
Fig. 42) for additional annunciation functions.
23
CONTROLLER
MODULE
SCREWS (2)
SAMPLE TUBE