Cooling Mode; Fan Only Mode; Operational Checks; Burner Flame - Goodman GMV95 Installation Instructions Manual

•
Furnace runs, integrated control module monitors safety
circuits continuously.
•
If the two-stage thermostat changes the call from low heat
to high heat, the integrated control module will immediately
switch the induced draft blower, gas valve, and circulator
blower to their high stage settings.
•
If the two-stage thermostat changes the call from high heat
to low heat, the control will immediately switch the induced
draft blower and gas valve to their low stage settings. The
circulator blower will remain on high heating speed for thirty
(30) seconds before switching to the low heat circulating
speed.
•
R and W1 (or R and W1/W2) thermostat contacts open,
completing the call for heat.
•
Gas valve closes, extinguishing flame.
•
Induced draft blower is de-energized following a fifteen
second post purge. Humidifier terminals are de-energized.
•
Circulator blower continues running for the selected heat
off delay period (90, 120, 150 or 180 seconds). The speed
run during this period depends on the last heat call provided
by the thermostat.
If the last call for heat was a call for low heat, the air circulator
motor will run on low heat speed for the duration of the heat
off delay period (90, 120, 150 or 180 seconds).
If the last call for heat was a call for high heat, the air
circulating motor will run on the high heating speed for thirty
(30) seconds and then switch to the low heating speed for
the balance of the heat off delay period (60, 90, 120 or 150
seconds).
•
Circulator blower and electronic air cleaner terminals are
de-energized.
•
Circulator blower ramps down to OFF during the 30 seconds
following the heat off delay period.
•
Furnace awaits next call from thermostat.
C M
OOLING ODE
The normal operational sequence in cooling mode is as follows:
•
R and YLO/G or Y/G thermostat contacts close, initiating a
call for cool.
•
Integrated control module performs safety circuit checks.
•
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 terminals are energized with
circulator blower.
•
Furnace circulator blower and outdoor cooling unit run their
appropriate speed, integrated control module monitors
safety circuits continuously.
•
R and YLO/G or Y/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 terminals 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
(56% of high stage cooling) following a five (5) second delay.
Electronic air cleaner terminals are 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
terminals are de-energized.
•
Furnace awaits next call from thermostat.
XVI. OPERATIONAL CHECKS
B F
URNER LAME
The burner flames should be inspected with the burner compart-
ment door installed. A sight glass is provided for inspection pur-
poses. Flames should stable, quiet, soft, and blue (dust may
cause orange tips but they must not be yellow). Flames should
extend directly outward from the burners without curling, floating, or
lifting off. Flames must not impinge on the sides of the heat ex-
changer firing tubes.
XVII. SAFETY CIRCUIT DESCRIPTION
G
ENERAL
A number of safety circuits are employed to ensure safe and proper
furnace operation. These circuits serve to control any potential
safety hazards and serve as inputs in the monitoring and diagno-
sis of abnormal function. These circuits are continuously moni-
tored during furnace operation by the integrated control module.
I C M
NTEGRATED ONTROL
The integrated control module is an electronic device which, if a
potential safety concern is detected, will take the necessary pre-
cautions and provide diagnostic information through an LED.
P L
RIMARY IMIT
The primary limit control is located on the partition panel and moni-
tors heat exchanger compartment temperatures. It is a normally-
closed (electrically), automatic reset, temperature-activated sen-
sor. The limit guards against the overheating as a result of insuffi-
cient conditioned air passing over the heat exchanger.
33
Check the burner flames for:
1. Good adjustment
2. Stable, soft and blue
3. Not curling, floating, or lifting off.

Burner Flame

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