Maytag Amana PTC A Series Service Instructions Manual page 22

PROPER INSTALLATION
REMOTE/STANDARD SWITCH (NOT USED ON NTE OR
NTP MODELS)
The remote/standard switch is used to change the control of
the unit from the standard on board controls in the standard
mode, to a remote wall mounted thermostat in the remote mode.
For remote control operation refer to Remote Operation sec-
tion. To set remote switch on the "G & K" board, see
Configuration Settings.
Fan Cycle Switch
The fan cycle switch sets the operational mode of the fan. In
the ON position, the fan will run continuously whenever the
unit is in the heat or cool mode. In the AUTO position, the fan
will cycle on and off with the compressor or electric heater
when the unit is in the cool or heat mode.
Remote Control Inputs (Not used on NTE or NTP Models)
The C, R, G,(GL for low fan speed or GH for high speed fan on
"C Models and later") W2, Y/W1 and B terminals provide con-
trol inputs for a remote wall mounted thermostat. See sche-
matics page 20.
IMPORTANT NOTE: Disconnect power to the unit and/or turn
the Master Switch on the control board to OFF when connect-
ing or altering wiring to any terminal. Failure to do so may
result in shorting the fuse or damaging the control board.
Front Desk Control (Not used on NTE or NTP Models)
The FD and RC terminals or FD1 and FD2 provide control in-
puts for a front desk switch. Shorting across these two termi-
nals will disable unit operation. The only control function which
will remain active when these terminals are shorted is freeze
protection. Any switch which will produce a short circuit across
these two terminals can be used as a front desk switch. The
contact resistance of the switch, when closed, must be less
than 200 ohms for the front desk feature to operate properly.
The following table shows the maximum wire length and corre-
sponding gage size for installation of a front desk switch.
MAXIMUM WIRE LENGTH
FOR FRONT DESK SWITCH
Wire Size
(AWG)
#24
#22
#20
#18
#16
The figures below shows a wiring schematic for connecting the
front desk switch to the unit.
22
Maximum
Length Allowed
(ft)
400
600
900
1500
2000
ON/OFF
W2 Y\W1
1 1 1
Front Desk Switch Wiring Schematic
IMPORTANT NOTE: Do not apply 24VAC across these ter-
minals. Applying 24VAC to these terminals will result in failure
of the control board. Shorting these terminals to any other ter-
minals may also result in control board failure.
Remote Temperature Sensing (Not used on NTE or NTP Mod-
els)
The RS and RC terminals provide control inputs for a remote
temperature sensor.
C R G W2 B RS FD
"C" Models or Later
1. Remove indoor ambient thermistor from plastic holder on
indoor coil.
Front Desk
Switch
ON / AUTO
RMT/STD
THERMOSTAT
+ 1
B
A
Remote
Sensor
2 3