2. ICM Controls
  3. ICM277

ICM Controls ICM277 Application/Install Guide

  • Hello! I've reviewed the datasheet for the ICM277 Fan Blower Post Purge Time Delay. This document outlines the specifications, timing delays, wiring, and troubleshooting for the device. It's designed to accurately control blower motor operation with specific ON and OFF delays. I'm ready to assist with any questions you might have about this product.
  • What is the ON delay of the ICM277?
    What is the OFF delay of the ICM277?
    What are the speed up options for ICM277?
    What is the relay rating of the ICM277?
7313 William Barry Blvd.
North Syracuse, NY 13212
ICM CONTROLS 800.365.5525
LII401-1
ICM277
FAN BLOWER POST PURGE TIME DELAY
Replaces: Goodman B1370735S, PCBFM131S
SPECIFICATIONS
Input
• Control Voltage: 18-30 VAC
• Frequency: 50/60 Hz
Output
• Type: Relay
• Form: SPDT NO/NC
• Rating: 25 amps @ 240 VAC
Time Delays
• ON Delay: 7 seconds
• OFF Delay: 65 seconds
Speed Up Options
• Speed up to C = Reduced delay
(3 sec. ON, 5 sec. OFF)
• Speed up to R = No delay
Environmental
• -20°F to 200°F
• 5% to 95% non-condensing
Timing Diagram
Upon application of power to the G terminal, the ICM277 recognizes a call for the blower
and a 7 second delay on make period begins. After the 7 second ON delay, the control
energizes the blower motor. Upon removal of power from the G terminal, the board will
keep the blower on for an additional 65 seconds. At the end of the 65 second OFF delay,
the blower will shut off.
MODE OF OPERATION
Problem Solution
Fan will not turn on Check Fuse (F1)
Check for 24VAC at R & C. Check for thermostat call
No delay or reduced delay Make sure the board is not in test mode
TROUBLESHOOTING
WIRING DIAGRAM
XFMR-C
G SPEED UP
M2 M1
C
XFMR-R
RCOM
NO
park park
L2
L1
ICM277
NC
T’Stat
24
VAC
System
XFMR
/