Completing Installation Of Return Air Smoke; Detector - Bryant 551K 04N Series Service And Maintenance Instructions

Single package rooftop cooling only/electric heat unit with puron (r-410a) refrigerant 3 to 5 nominal tons

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SUPPLY AIR

SMOKE DETECTOR

Fig. 39 — Typical Supply Air Smoke Detector Sensor

Location

RETURN AIR SMOKE DETECTOR SENSOR WITHOUT

ECONOMIZER

The sampling tube is located across the return air opening on

the unit basepan. See Fig. 40. The holes in the sampling tube

face downward, into the return air stream. The sampling tube is

connected through tubing to the return air sensor that is mount-

ed on a bracket high on the partition between return filter and

controller location. The sensor is shipped in a flat-mounting lo-

cation. Installation requires that this sensor be relocated to its

operating location and the tubing to the sampling tube be con-

nected. See installation steps.

RETURN AIR

SMOKE DETECTOR

(AS SHIPPED)

Fig. 40 — Typical Return Air Smoke Detector Location

RETURN AIR SMOKE DETECTOR SENSOR WITH

ECONOMIZER

The sampling tube is inserted through the side plates of the

economizer housing, placing it across the return air opening on

the unit basepan. See Fig. 41. The holes in the sampling tube

face downward, 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 control-

ler location. The sensor is shipped in a flat-mounting location.

Installation requires the sensor be relocated to its operating lo-

cation and the tubing to the sampling tube be connected. See

installation steps below.

Fig. 41 — Return Air Sampling Tube Location (View

reoriented to show opposite side for clarity.)