7
Wiring Diagram—Blower (Variable Speed Motor)
Complete Installation
Pre-Start Check
■
Is unit properly located, level, secure, and serviceable?
■
Is the wiring neat, correct, and in accordance with the wiring
diagram?
■
Is the air handler properly grounded and connected to a
properly sized fuse or circuit breaker?
■
Is the thermostat correctly wired, level, and in a good
location?
■
Are all access panels in place and secure?
■
Are any accessories properly installed?
Check Airflow (PSC Motor)
Cooling blower speed—if cooling is used
■
For proper cooling operation, the airflow through the indoor
coil should be between 350 and 450 CFM per ton of cooling
capacity (or 350 - 450 CFM per 12,000 Btu/h) based on the
rating of the outdoor condensing unit.
■
The cooling blower speed is factory configured to provide
correct airflow for an outdoor condensing unit or heat pump
that matches the maximum cooling capacity rating of the air
handler.
■
If the outdoor condensing unit is smaller than the maximum
cooling capacity rating for the air handler, the cooling blower
speed may need to be changed. Refer to Blower
Performance Chart—PSC Motor.
IMPORTANT: The cooling blower speed must be set to provide a
minimum of 350 CFM airflow per ton (12,000 Btu/h) of outdoor
cooling capacity. The heating blower speed must be set
according to the heater installation instructions if installed.
Power (Factory Wired)
Control (Factory Wired
Transformer TR
Blower Motor MTR
Ground Connection GND
Blower Relay BWR
6-Pin Plug
18 R
18 BU
18 W
18 R
18 BU
18 W
18 BU/W
18 BK
18 OR
18 Y
18 G
18 BK
18 Y
16-Pin
Plug & Cap
R
C1
W2
O
Y2
Y1
G
W1
16-Pin
Plug & Cap
MTR
5-Pin Cap
18 G
GND
5-Pin
Plug
R
C1
W1
O
Y2
Y1
G
EM
Hum
Control Board
18 BK
18 B
U
18 W
14 R
18 BK
18 Y
R 24V
14 BK
14 Y
L1
L2
COM
208V
24V
BU
R
TR
24V
240V
240
BWR
18 BR
(16)
1
2
3
4
5 6
1
2
3
4
5
Ther
mostat
Содержание WMB
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