Goodman GMVM Service Instructions Manual page 57

OPERATION
F M
AN ODE
C T
ONVENTIONAL HERMOSTAT
Two seconds after G request becomes active without Y1 re-
quest, IFC will run the circulator at the appropriate speed (as
selected by the DIP switches), unless circulator is running
as a result of Heat or Cool mode. The circulator speed re-
quired by the heat or cool demand always has priority over G
speed.
C T
OMMUNICATING HERMOSTAT
If a conventional G request is present without a heat or cool
request from the communicating thermostat, the circulator
will run at the selected fan speed.
H C
UMIDITY ONTROL
H O – C
UMIDIFIER UTPUT ONVENTIONAL
One set of isolated relay contacts are wired to a pair of termi-
nals for connection to a humidifier. When the inducer is on
the IFC closes the humidifier relay contacts, except from the
calibration routine where the humidifier relay contacts are
always open.
H O – C
UMIDIFIER UTPUT OMMUNICATING
One set of isolated relay contacts are wired to a pair of termi-
nals for connection to a humidifier. Upon receipt of a Humidi-
fication Requested Demand the IFC will:
• Close the humidifier relay contacts
• Energize the circulator at the circulation speed (G
speed) unless the circulator is commanded to a differ-
ent speed by a heat demand.
Dehumidification – Conventional Thermostat
• DEHUM functionality is enabled by a DIP switch set-
ting.
• The IFC varies circulator speed operation based on the
DEHUM signal from the thermostat
• If 24VAC (R) is not connected to DEHUM (through a
Humidistat) and both Y1 and O terminals are ener-
gized, then the IFC control reduces the cooling CFM
by 15%.
• If both Y1 and O terminals are not energized, the
DEHUM signal is ignored
• DEHUM is ignored during any heating request.
L P -B
EARN USH UTTON
Pressing the learn button re-sets the communicating net-
work and allows the IFC to search for communicating equip-
ment The press and release of the button starts the same
learning process as during power-up of the system.
T
HERMOSTAT
T
HERMOSTAT
C T ™ C
LIMATE ALK OMMUNICATION
The IFC has two LEDs :
• Red communications LED – Indicates the status of
the network
• OFF is normal condition.
• 2 slow flashes on power-up: ON for ¼ second, OFF for
¾ second, ON for ¼ second, OFF.
• Continuous slow flash indicates communication fail-
ure: ON for ¼ second, OFF for ¾ second...
• Green receive LED – Indicates network traffic
• Fast, sporadic flashes indicates normal bus commu-
nication.
• ON solid indicates a Data 1 / Data 2 miswire.
Model Tap
*CVM960604CX*
C
D
*CVM960805DX*
C
D
*CVM961005DX*
C
D
*MVM960603BX*
C
D
*MVM960805CX*
C
D
*MVM961005DX*
C
D
*MVM961155DX*
C
D
*100% CF M shown. CFM will vary proportionally with the gas valve
BTU/H input.
Airflow Table
LED
S
Low High 10 0%
Stage Stage Heat
Cool Cool *CFM
A 370 660 1220
B 540 860 1340
790 1 150 1460
980 1 470 1590
A 530 900 1600
B 730 1 100 1710
930 1 430 1800
1220 1 880 1910
A 500 780 1730
B 740 1 070 1770
920 1 380 1840
1160 1 780 1870
A 390 630 9 50
B 550 800 1050
680 1 000 1170
800 1 210 1270
A 540 830 1600
B 750 1 090 1690
980 1 460 1800
1210 1 800 1890
A 510 790 1810
B 710 1 100 1850
910 1 410 1890
1160 1 830 1940
A 510 790 1810
B 710 1 100 1850
910 1 410 1890
1160 1 830 1940
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