Specifications

Fan Blower Controls
Fan Blower • Off Delay on Break
APPLICATIONS TIMING DIAGRAM
”OFF delay on break”
Controls the circulating fan in heat pump, air conditioning and forced air systems. OFF delay timing function continues
to run the fan at the end of the heating/cooling cycle, thereby purging ducts of residual air and increasing system
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 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.
Fan Blower • Dual On/Off
APPLICATIONS TIMING DIAGRAM
”ON delay on make” and ”OFF delay on break”
Controls the circulating fan in heat pump, air conditioning and forced air systems. Delay on make lets air reach proper
level prior to turning on the fan. OFF delay timing function continues to run the fan at the end of the heating/cooling
cycle, thereby purging ducts of residual air and increasing system efficiency.
Time
Delay
Delay
on Make
Delay on
Break Per od
Initiate Switch
Closed
Initiate Sw tch
Open
0
V
Input
Voltage
0
V
Load
Voltage
Time
Time
Time
Delay
Load Energized
MODE OF OPERATION
Power must be applied before and during the time delay period. When the initiate contact closes, the delay on make
period begins. The load then energizes and remains energized as long as the initiate contact is closed. The delay on
break period begins when the initiate contact opens. At the end of the time delay, the load is turned off. If the initiate
contact recloses during the time delay, the load remains energized and the time delay is reset to zero. Removal of
input power during the delay turns off the load and resets the time delay to zero.
OFF Delay Timing Purges Residual Air
ICM Control Features and Applications Specifications Replaces
ICM253
• UL 873 recognition for compressor applications
• Post-purge fan delay timer
• OFF delay purges ducts of residual air at the end of the heating/cooling cycle
• Interrogation delay eliminates nuisance trips due to thermostat bounce/tampering
• Voltage: 18-30 VAC
• 1 amp maximum
• 40 mA minimum
• 10 amp inrush
• Adjustable time delay:
• 12-390 seconds
• Dimensions: 2” x 3”
• Field Controls:
46144700
• Gemline: 1C216
• Mars: 32393
ICM Control Features and Applications Specifications Replaces
ICM251
• Drives fan directly
• High power, relay output
• Dual function fan delay timer
• Controls the circulating fan in heat pump, A/C and forced air systems
• OFF delay controls fan relay to purge ducts of residual air at the end of the
heating/cooling cycle
• ON delay allows air to reach the proper comfort level prior to energizing the fan
• 115 and 230 VAC are also available, please consult factory
• Voltage: 18-30 VAC
• Output:
• N.O.: 20 amps @ 240 VAC
• N.C.: 10 amps @ 240 VAC
• Time delays adjustable:
• ON: 1-180 seconds
• OFF: 12-390 seconds
• Dimensions: 2” x 3”
• Mars:
32377
32378
32379
ICM254
• Dual function fan delay timer
• Controls the circulating fan in heat pump, A/C and forced air systems
• OFF delay controls fan relay to purge ducts of residual air at the end of the
heating/cooling cycle
• ON delay allows air to reach the proper comfort level prior to energizing the fan
• Voltage: 18-30 VAC
• 1 amp maximum
• 40 mA minimum
• 10 amp inrush
• Time delays adjustable:
• ON: 1-180 seconds
• OFF: 12-390 seconds
• Dimensions: 2” x 3”
• Honeywell:
S876A1016
• Watsco:
PSTD-000-005W
PSTD-000-060W
ICM255
• Low cost open board design
• High power, relay output
• Dual function fan delay timer
• Controls the circulating fan in heat pump, A/C and forced air systems
• OFF delay purges ducts of residual air
• ON delay allows air to reach the proper comfort level prior to energizing the fan
• Voltage: 18-30 VAC
• N.O.: 20 amps @ 240 VAC
• N.C.: 20 amps @ 240 VAC
• Time delays fixed:
• ON: 1 second
• OFF: 60 seconds
• Dimensions: 2.5” x 2.5”
• A-1: 5893
• Bard: 8201-056
• Mars: 32574
• Rheem:
42-22515-01
42-22515-02
42-22515-03
• Snyder General/
ICP: 1395336
315.233.5266
Phone
All features and specifications subject to change without notice.
Customer Service Fax
315.233.5282
Application Assistance
800.365.5525
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