Ruud ANL-AZ 13 SEER Series, Installation Instructions Manual

18

WIRING

WARNING:

Turn off electric power 

at the fuse box or service panel before making 

any electrical connections� Also, the ground 

connection must be completed before making line 

voltage connections� Failure to do so can result in 

electrical shock, severe personal injury, or death� 

Control Wiring

Running low-voltage wires in conduit with line 

voltage power wires is not recommended� Low-

voltage wiring may be run through the insulated 

bushing provided in the 7/8" [19 mm] hole in the 

base panel, up to and attached to the pigtails from 

the bottom of the control box� Conduit can be 

run to the base panel if desired by removing the 

insulated bushing�
A thermostat and a 24-volt, 40 VA minimum 

transformer are required for the control circuit 

of the system� The furnace or the air handler 

transformer may be used if sufficient� See the 

wiring diagram for reference� Use “Wire Size” table  

to size the 24-volt control wiring� 
Do not use phone cord to connect indoor and 

outdoor units� This will damage the controls�

Control Wiring

CONTROL WIRING FOR GAS OR OIL FURNACE

FOR TYPICAL GAS OR OIL HEAT

C

Y

G

W

R

Y

G

W

R

TYPICAL THERMOSTAT

SUBBASE

TYPICAL GAS OR

OIL FURNACE

TYPICAL CONDENSING

UNIT

BR – BROWN WIRE

YL – YELLOW WIRE

X – WIRE CONNECTION

YL

BR

X

X

FOR TYPICAL ELECTRIC HEAT

W/BL

R

W/BK

G/BK

YL

BR

PU

BR – BROWN WIRE

R – RED WIRE

YL – YELLOW WIRE

W/BK – WHITE WIRE WITH BLACK STRIPE

G/BK – GREEN WIRE WITH BLACK STRIPE

PU – PURPLE WIRE (NOT USED)

X – WIRE CONNECTION

*

IF MAXIMUM OUTLET TEMPERATURE RISE IS DESIRED, IT IS RECOMMENDED THAT

W1 (W/BK) AND W2 (W/BL) BE JUMPERED TOGETHER.

TYPICAL CONDENSING

UNIT

YL

BR

X

X

X

X

X

X

X

Y

G

W

R

TYPICAL THERMOSTAT

SUBBASE

X

TYPICAL ELECTRIC HEAT

LOW VOLTAGE JUNCTION BOX

•

*

A thermostat and a 24-volt, 40 VA minimum 

transformer are required for the control circuit 

of the heat pump� The furnace or the air handler 

transformer may be used if sufficient� See the 

appropriate wiring diagram for reference� Use table 

below to size the 24-volt control wiring�

FIELD WIRE SIZE FOR 24-VOLT THERMOSTAT CIRCUITS

(1) Wire length equals twice the run distance�
NOTICE: Do not use control wiring smaller than No� 18 

AWG between thermostat and outdoor unit�

Typical Noncommunicating 

Thermostat Wiring Diagrams

The following figures show the typical wiring 

diagrams� Cooling airflows may need to be 

adjusted for homeowner comfort once the system 

is operational�

Thermo-
stat Load 
(amps)

SOLID COPPER WIRE – AWG

3.0
2.5
2.0

16         14         12         10         10         10    
16         14         12         10         10         10   
16         14         12         10         10         10   

50        100       150       200       250       300
[15]      [30]      [46]       [61]       [76]      [91]
Length of Run – Feet [m] (1)

WIRE COLOR CODE

BK – BLACK          GY – GRAY               W – WHITE
BR – BROWN        O – ORANGE             Y – YELLOW
BL – BLUE             PR – PURPLE
G – GREEN            R – RED  

Wiring