Fujitsu 36RLX Service-Bulletin

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FUJITSU GENERAL AMERICA, INC
353 Route West. Fairfield, NJ 07004
Ph: 973-575-0381 Fx: 973-836-0449
PROBLEM
Fresh Air Intake w/ Compressor Operation Only
SOLUTION
Duct Fan Control
MODEL :18/24/36/42RLX Systems
1. Outline
The circuit shown below provides a cost effective solution for wiring a current switch
that monitors the compressor operation ON/OFF status and energizes the coil of a
relay which in turn close the contacts and provide line voltage to the duct fan. The
duct fan is required to introduce fresh (outside) air for ventilation.
2. Application
A third party current sensor switch with a built-in relay was
used in this application. The current sensor may be
installed around one of the compressor line voltage wires (Red,
Black or White).
3. Wiring diagram
Production: All Cassettes
IPM
Current Sensor
N.O.
N.O.
+
24V DC
_
N.O.
Built in Relay
115V AC
SERVICE BULLETIN
Number: 0006
Date: 9/22/09 Rev2
Type: Field
Compressor
Duct fan booster