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Dip Switch Description (located behind
access cover on front of control box)
Dip SWI #1–#8
#1–#4 = Temperature Limiting – see charts, page 4.
#5–#6 = Approximate outdoor temperature when unit will au-
tomatically change from reverse cycle heating to electric heat.
#5-OFF & #6-OFF = 35
#5-ON & #6-OFF = 30
#5-ON & #6-ON = 25
o
#7-OFF = Normal HP operation, ON = electric heat only.
#8-OFF = Constant indoor fan, ON = Cycle
Dip SW2 #1–#4
#1-OFF = Control pad activated, ON = 24V wall stat activated.
#2-OFF = Room temperature sensor on chassis, ON = sensor
on control pad.
#3-OFF = Motion & Door sw. activated, ON = Timer and Sleep
activated.
#4-OFF = Room freeze protection is activated, ON = deacti-
vated.
NOTE: All dip switches ship from factory in the OFF posi-
tion except #8 of 8 and #3 of 4 which are shipped turned
ON. Any switch changes must be followed by unplugging
and plugging in the power cord to activate the change.
Quick Heat & Cool – This feature provides extra comfort for
the occupant during start up of an unconditioned space. When
off for more than 2 hours, the unit setting will automatically
o
o
raise 2
F in Heat or drop 2
from the cold or warm walls, ceiling and floor. The 2
maintained for the first cycle only. After that, the setting re-
verts to that shown on the digital display.
Motion Sensor & Door Switch – (activate by dip switch #3 of
4 turned OFF)
–
Two receptacles under the access cover on
front of control box provide connections for the motion sen-
sor and door switch. (Motion sensor and door switch are avail-
able from your sales representative. The motion sensor is cus-
tom-made for McQuay with both "ON" & "OFF" having no
time delay. Motion sensors by others will not work.) Two plug
and wire assemblies are included with each chassis. Connect
receptacle "MOTION" to motion sensor and "DOOR" to door
switch.
While room is occupied, the motion sensor keeps the control
"normal" so the occupant has full control of the unit. Fifteen
minutes after the occupant leaves the room, the unit goes into
memory P2. 14 hours later, if no one has entered the room,
the unit goes into memory P1. Both P1 and P2 come factory
set in COOL mode @ 75
o
temperature and mode by using a G11 hand held remote con-
troller available from your sales representative.
o
F (factory setting)
o
F
F
F in Cool to offset the radiation felt
o
F offset is
F. They can be reprogrammed for
Programming P1 using the G11 control – press and hold
the upper + button for 3 seconds until P1 starts flashing on
the G11 display. While P1 is still flashing, press the buttons to
select temperature, fan speed, and mode for P1. Wait 15 sec-
onds until P1 stops flashing, then press and release the upper
+ button to send the P1 program to the unit control. P1 will
flash on the unit display to show it was accepted.
Programming P2 using the G11 control – press and hold
the upper - button for 3 seconds until P2 starts flashing. While
P2 is still flashing, select temperature, fan speed, and mode
desired for P2. Wait 15 seconds until P2 has stopped flash-
ing, then press and release the upper - button to send the P2
program to the unit control. P2 will flash on the unit display to
show it was accepted.
–
Control Lockout
The unit control has an electrical lockout
feature to prevent anyone from changing the mode, tempera-
ture or fan speed. To activate this lockout, press and hold the
unit FAN key for 10 seconds until LO shows on display. To
unlock the control, press and hold the FAN key for 10 sec-
onds until UL shows.
Remote Wall Thermostat
–
General
Remove the control pad from the unit by unsnap-
ping it from its base and unplugging it from the receptacle on
the control box front. The snap-in decorative cover (ordered
separately) now mounts in place of the control pad. To modify
the controls for Remote Wall Thermostat, slide dip switch #1
of 4 to ON. Also, unplug the power cord from the receptacle
and plug back in again to reset the circuit. Four to seven low-
voltage wires, as determined by the wall thermostat selected,
connect to the 7 pin receptacle CN2, behind the access cover,
on the control box front. Use the 7 pin plug and wire assembly
provided. Mount the thermostat on an inside wall. Avoid unit
discharge air, direct sunlight and cold drafts.
–
Operation
The 24V wall thermostat should have the normal
R, W, Y, and G terminals plus C if it requires 24V AC power
from the unit. By using all 7 low voltage connections, wall stats
with 2 stage heat & fan speed selection can also be used.
Stats can be MCO, ACO, MCO/ACO or programmable. With
the exception of "wired Remote ON/OFF", the control fea-
tures listed for the standard control pad will not be available
with the wall thermostat. Low fan speed is standard for stats
without speed selection.
IM 812 / Page 5 of 28
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