Completing Installation Of Return Air Smoke; Detector; Fiop Smoke Detector Wiring And Response - Carrier 48JCH 04-06 Series Service And Maintenance Instructions

RETURN AIR SMOKE DETECTOR SENSOR WITH
ECONOMIZER
The sampling tube is inserted through the side plates of the econo-
mizer housing, placing it across the return air opening on the unit
basepan (see Fig. 34). The holes in the sampling tube face down-
ward, into the return air stream. The sampling tube is connected
using tubing to the return air sensor mounted on a bracket high on
the partition between return filter and controller location. The sen-
sor is shipped in a flat-mounting location. Installation requires the
sensor be relocated to its operating location and the tubing to the
sampling tube be connected. See "Completing Installation of Re-
turn Air Smoke Detector" below.
Fig. 34 — 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. 35). Save the screws.
2. Remove the return air smoke sensor module and its detector
plate.
Fig. 35 — Return Air Smoke Detector
Shipping Position
Return Air
Sampling Tube
Flexible Exhaust Tubes
Screws
Sample Tube
Return Air Smoke Detector
(Operating Position Shown)
Fig. 36 — Return Air Smoke Detector
Operating Position
3. Rotate the detector plate so the sensor is facing outwards
and the sampling tube connection is on the bottom (see
Fig. 36).
4. Screw the sensor and detector plate into its operating position
using screws from Step 1. Ensure the sampling tube connec-
tion 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.

FIOP Smoke Detector Wiring and Response

SYSTEMVU™ UNITS
See Fig. 37 for typical SystemVu controller smoke detector wiring
Highlight A
Smoke detector NC contact set will open on smoke alarm condi-
tion, de-energizing the ORN conductor.
Highlight B – Using Remote Logic (SystemVu Controller)
Six conductors are provided for field use (see Highlight B) for ad-
ditional annunciation functions.
A A
Fig. 37 — Typical Smoke Detector System Wiring,
SystemVu Control Units.
20
Controller
Module
Screws (2)
Sample Tube
B