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HEATING – A 24V solenoid coil on reversing valve
controls heating cycle operation. Two thermostat
options, one allowing "Auto" change over from cycle to
cycle and the other constantly energizing solenoid coil
during heating season and thus eliminating pressure
equalization noise, are to be used. On "Auto" option, a
circuit is completed for R-W1 and R-Y on each heating
"on" cycle, energizing reversing valve solenoid and
pulling in compressor contactor starting compressor.
R-G also makes starting indoor blower motor. Heat
pump heating cycle now in operation.
The second option has no "Auto" change over position,
but instead energizes the reversing valve solenoid
constantly whenever the system switch on subbase is
placed in "Heat" position, the "B" terminal being
constantly energized from R. A thermostat demand for
heat completes R-Y circuit pulling in compressor
contactor starting compressor. R-G also make starting
indoor blower motor.
R
A
T
E
D
M
O
D
E
L
E
S
P
Q
W
2
4
2
0
0 .
Q
W
3
0
2
0
0 .
Q
W
3
6
1
0
0 .
Q
W
4
2
1
0
0 .
Q
W
4
8
1
0
0 .
Q
W
6
0
1
0
0 .
NOTE: These units are equipped with a variable speed (ECM) indoor motor that automatically
adjusts itself to maintain approximately the same rate of indoor air flow in both heating and
cooling, dry and wet coil conditions, and at both 230/208
1
Maximum ESP (inches WC) shown is with 1" thick disposable filter (reduced by .2 for 2" filter).
2
Rated CFM for ducted applications – required for maximum performance rating. To obtain full CFM on
models QW361, QW421, QW481 and QW601 locate low voltage terminal strip in the circuit breaker box.
There is a pink jumper wire with both ends attached to terminal marked "G2". Move one end of the jumper to
terminal "Y".
3
Optional CFM – the unit is shipped from the factory set to operate at the optional CFM level
This provides lower operating sound levels for non-ducted, free discharge applications. This reduces
system capacity performance by approximately 2% at the same energy efficiency.
4
Continuous fan CFM is the total air being circulated during continuous fan mode.
Manual 2100-419E
Page
26 of 48
TABLE 4
INDOOR BLOWER PERFORMANCE
1
2
M
A
. X
E
S
P
R
A
T
E
D
C
F
0
5 .
8
0
0
0
8 .
1
0
0
0
0
8 .
1
2
0
0
0
8 .
1
2
0
0
0
8 .
1
4
0
0
0
8 .
1
5
5
0
PRESSURE SERVICE PORTS
High and low pressure service ports are installed on all
units so that the system operating pressures can be
observed. Pressure charts can be found later in the
manual covering all models on both cooling and heating
cycles. It is imperative to match the correct pressure
chart to the unit by model number. All service doors
must be attached to obtain proper reading. The service
ports are located behind the center door on the left hand
side of the unit above the air filters.
3
O
P
T
O I
N
A
L
C
O
N
M
C
F
M
N
A /
N
A /
1
0
0
0
1
0
0
0
1
1
0
0
1
2
5
0
or 460 volts.
4
T
N I
U
O
U
S
C
F
M
M
A
. X
@
E
S
P
C
F
M
8
0
0
7
0
0
1
0
0
0
9
1
0
1
0
0
0
1
1
7
5
1
0
0
0
1
1
7
5
1
1
0
0
1
1
7
5
1
2
5
0
1
4
0
0
shown.
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