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Installation
CAUTION
Before attempting to perform any service or mainte
nance, turn the electrical power to unit OFF at dis
connect switch.
Smoke detector sensor and power board installation
Use manufacturer's instructions provided with smoke
detector to install sensor(s) and power board. Refer to
figure 1 for location of power board, supply air sensor and
return air sensor. See figure 2 to assemble the supply air
bracket.
Sampling tube installation
1 - Select the appropriate sampling tube.
Supply air sensor -- 36”
Return air sensor -- 18”
2 - Slide metal sampling tube onto the back side of the
sensor. When sensor is installed in return air
applications, slide plastic exhaust tube onto back
side of sensor. See figure 3.
NOTE -
Plastic exhaust tube is NOT used in supply air
applications and should be discarded.
3 - Orient sampling tube so that holes point toward the
air stream.
FIGURE 1
SMOKE DETECTOR COMPONENT LOCATIONS
ROUTE P253 SUPPLY AIR
HARNESS THROUGH PLASTIC
CONDUIT OVER FILTER FRAME
ROUTE P250 AND P252
FROM THE OTHER END OF
SUPPLY AIR HARNESS
A173 POWER
BOARD
A171 RETURN
AIR SENSOR
A172 SUPPLY
AIR SENSOR
P251
J251
J253
P253
IDENTIFY CONNECTORS
BY LABELS STAMPED
ON WIRES
SUPPLY AIR SMOKE DETECTOR SUPPORT BRACKET
FIGURE 2
A172 SUPPLY
AIR SENSOR
HEAD
SUPPLY AIR
BRACKETS
