255 ICM POST PURGE FAN DELAY

255 ICM  POST PURGE FAN DELAY
ICM 255
Low Cost, High Power
Fan Delay, Controls
Circulating Fan Relay
POST PURGE FAN DELAY
HBOR
•Replaces thermal time delays
•OFF delay purges ducts of residual air to increase efficiency
MODE OF OPERATION
Power must be applied before and during the time delay period. When the initiate contact
closes, the load energizes and remains energized as long as the initiate contact is closed. The
time delay begins when the initiate contact opens. At the end of the time delay period, the load is
turned off. If the initiate contact recloses during the time delay period the load remains energized
and the time delay is reset to zero. Removal of the input power during the delay turns off the
load and resets the time delay to zero. A one second interrogation delay is provided to avoid
nuisance trips due to thermostat bounce or tampering.
SPECIFICATIONS
INSTALLATION
Input
• Voltage: 18-30 VAC
• Frequency: 50-60 Hz
1.Disconnect power.
2.Connect terminals as shown in the wiring
diagram below.
3.Reapply power, check operation.
Output Ratings
• Type: Relay
• N.O. contact: 20 amps resistive
• N.C. contact: 10 amps resistive
TIMING DIAGRAM
OFF Time Delays
• Factory fixed: 60 seconds
WIRING DIAGRAM
PF
C
SF
PS
SS
24 VAC
Untimed
Load
R
Initiate Switch
G
C
R
Common
N.O. Contact
N.C. Contact
ICM CONTROLS
www.icmcontrols.com
7313 William Barry Blvd.
North Syracuse, NY 13212
800.365.5525
LII040-1
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