Rheem RHPD Series, Installation Instructions Manual

Page: 48 / 84

48
B. CONTROL WIRING (Class II)
1. Low voltage wiring should not be run in conduit with
power wiring.
2. Control wiring is routed through the 7/8” [22 mm] hole in
the unit side panel. Use a minimum #18 AWG thermo-
stat wire. For wire lengths exceeding 50’ [15.24 m] use
#16 AWG thermostat wire. Connect the control wiring
to the low voltage terminal block located on the unit
integrated control. Route wires under the control voltage
shield. See Figure 15.
3. It is necessary that only approved thermostats be used.
Please contact your distributor for part number infor-
mation. See thermostat specification catalog for recom -
mended thermostat.
4. Figure 18 shows representative low voltage connection
diagrams. Read your thermostat installation instructions
for any special requirements for your specific thermo -
stat.
C. INTERNAL WIRING
1. A diagram of the internal wiring of this unit is located on
the inside of the control access panel and in this man-
ual. If any of the original wiring must be replaced, the
wire gauge and insulation must be the same as original
wiring.
Transformer is factory-wired for 230 volts on 208/230
volt models and must be changed for 208-volt applica-
tions. See unit wiring diagram for 208-volt wiring.
D. GROUNDING
GROUNDING MAY ALSO BE ACCOMPLISHED BY
GROUNDING THE POWER LINE CONDUIT TO THE
UNIT. MAKE SURE THE CONDUIT NUT LOCKING TEETH
HAVE PIERCED THE INSULATING PAINT FILM OF THE
SIDE PANEL.
E. THERMOSTAT
The thermostat should be mounted on an inside wall about
five feet above the floor in a location where it will not be
affected by unconditioned air, sun, or drafts from open doors
or other sources. READ installation instructions in heat
pump thermostat package CAREFULLY because each has
some different wiring requirements.
XIII. INDOOR AIR FLOW DATA
Belt-drive blower models have motor sheaves set for proper
CFM at a typical external static. See Airflow Data Tables to
determine if adjustments are necessary.
TABLE 1. COPPER WIRE SIZE — AWG (1% VOLTAGE DROP)
300
250
200
150
100
50
Supply
Wire
Length
Feet
4
4
6
8
10
14
15
3
4
4
6
8
12
20
2
3
4
6
8
10
25
2
3
4
4
6
10
30
1
2
3
4
6
8
35
1/0
1
2
4
6
8
40
1/0
1
2
3
4
6
45
2/0
1/0
1
3
4
6
50
2/0
1/0
1
2
4
6
55
3/0
2/0
1/0
2
3
4
60
3/0
2/0
1/0
1
3
4
65
3/0
2/0
1/0
1
2
4
70
4/0
3/0
2/0
1/0
2
3
75
4/0
3/0
2/0
1/0
2
3
80
4/0
3/0
2/0
1/0
1
3
85
4/0
4/0
3/0
1/0
1
2
90
250
4/0
3/0
2/0
1
2
95
250
4/0
3/0
2/0
1
2
100
250
4/0
3/0
2/0
1
2
105
250
4/0
3/0
2/0
1/0
2
110
300
250
4/0
2/0
1/0
1
115
300
250
4/0
3/0
1/0
1
120
300
250
4/0
3/0
1/0
1
125
Circuit Ampacity
NOTE:
1. Wire size based on 60ºC type copper conductors below 100 ampacity. 2. Wire size based on 75ºC type copper conductors for 100 ampacity and above.
FIGURE 19
THERMOSTAT CONNECTIONS DIAGRAMS
R Y1 Y2 G C
TERMINAL BLOCK
ST-A1125-36-00
ONLY USED
ON DUAL
FUEL OR HEAT
PUMP
MODELS
IFC BOARD LOW VOLTAGE
THERMOSTAT CONNECTIONS
W3 B
A1 A2
W1 W2
R Y1 Y2 G C E W B
J2
NOTE: Y2 IS ONLY NECCESSARY FOR ECONOMIZER OPERATION
STANDARD WIRING
R Y1 Y2 G C
ST-A1125-37-00
ONLY USED
ON DUAL
FUEL OR HEAT
PUMP
MODELS
IFC BOARD LOW VOLTAGE
THERMOSTAT CONNECTIONS
W3 B
A1 A2
W1 W2
R Y1 Y2 G C E W B
NOTE:
REMOVE PURPLE JUMPER J1 FROM IFC QUICK CONNECT TERMINALS.
REMOVE WHITE JUMPER J2 FROM A1 TO A2 THERMOSTAT CONNECTIONS.
REMOVE JUMPER AT THERMOSTAT SUBBASE FROM E TO W.
Y2 IS ONLY NECCESSARY FOR ECONOMIZER OPERATION.
ALTERNATE LOW VOLTAGE WIRING WITH OUTDOOR THERMOSTAT
WHITE
BLACK
BLUE
BROWN
RED
-XPT-A04 OUTDOOR
DUAL THERMOSTAT
WITH ELECTRIC HEAT
RELAY
!
THE UNIT MUST BE PERMANENTLY GROUNDED. A
GROUNDING LUG IS PROVIDED IN THE ELECTRIC HEAT
ACCESS AREA FOR A GROUND WIRE. FAILURE TO
GROUND THIS UNIT CAN RESULT IN FIRE OR ELECTRI-
CAL SHOCK CAUSING PROPERTY DAMAGE, SEVERE
PERSONAL INJURY OR DEATH.
WARNING