Operational Checks; Fan Only Mode; Safety Circuit Description; Integrated Control Module - Goodman *CVC96 Installation Instructions Manual

• Outdoor fan and compressor are energized to their appropriate speed.
• Circulator blower is energized on the appropriate cool speed at the level and time determined by the selected
ramping profile. Electronic air cleaner terminal is energized with circulator blower.
• Furnace circulator blower and outdoor cooling unit run their appropriate speeds, integrated control module monitors
safety circuits continuously.
• R and Y1/G or Y2/G thermostat contacts open, completing the call for cool.
• Outdoor fan and compressor are de-energized.
• Circulator blower continues running during a cool off delay period. The OFF delay time and airflow level are determined
by the selected ramping profile.
• Electronic air cleaner terminal and circulator blower are de-energized.
• Furnace awaits next call from thermostat.
F O M
AN NLY ODE
The normal operational sequence in fan only mode is as follows:
• R and G thermostat contacts close, initiating a call for fan.
• Integrated control module performs safety circuit checks.
• Circulator blower is energized on continuous fan speed (25, 50, 75 or 100% of the furnace's maximum airflow
capability. Fan speed selected by dip switches) following a five (5) second delay. Electronic air cleaner terminal is
energized.
• Circulator blower runs, integrated control module monitors safety circuits continuously.
• R and G thermostat contacts open, completing the call for fan.
• Circulator blower is de-energized. Electronic air cleaner terminal is de-energized.
• Furnace awaits next call from thermostat.
O C
PERATIONAL HECKS
The burner flames should be inspected with the burner compartment door installed.
Flames should be stable, quiet, soft, and blue (dust may cause orange tips but they
must not be yellow). Flames should extend directly outward from the burners with-
out curling, floating, or lifting off. Flames must not impinge on the sides of the heat
exchanger firing tubes.
S C D
AFETY IRCUIT ESCRIPTION
A number of safety circuits are employed to ensure safe and proper furnace opera-
tion. These circuits serve to control any potential safety hazards and serve as inputs
in the monitoring and diagnosis of abnormal function. These circuits are continuously monitored during furnace operation by the

integrated control module.

I C M
NTEGRATED ONTROL ODULE
The integrated control module is an electronic device which, if a potential safety concern is detected, will take the necessary
precautions and provide diagnostic information through an LED.
P L
RIMARY IMIT
The primary limit control is located on the partition panel and monitors heat exchanger compartment temperatures. It is a normally-
closed (electrically), automatic reset, temperature-activated sensor. The limit guards against overheating as a result of insufficient
conditioned air passing over the heat exchanger.
A L
UXILIARY IMIT
The auxiliary limit controls are located on or near the circulator blower and monitors blower compartment temperatures. They are
a normally-closed (electrically), manual-reset sensors. These limits guard against overheating as a result of insufficient conditioned
air passing over the heat exchanger.
R L
OLLOUT IMIT
The rollout limit controls are mounted on the burner/manifold assembly and monitor the burner flame. They are normally-closed
(electrically), manual-reset sensors. These limits guard against burner flames not being properly drawn into the heat exchanger.
48
Burner Flame
Figure 56