Thermostat / Low Voltage Connections; 2-Stage Heating - Nordyne P5RF-X24K Installation Instructions Manual

Thermostat / Low Voltage Connections

• These units are designed to operate with a 24 VAC
Class II control circuit. The control circuit wiring must
comply with the current provisions of the NEC (ANSI/
NFPA 70) and with applicable local codes having
jurisdiction. Thermostat connections should be made
in accordance with the instructions supplied with the
thermostat and the indoor equipment.
• The low voltage wires must be properly connected.
Route 24V control wires through the sealing grommet
(Figure 4, page 6) near the power entrance. Connect
the control wires to the defrost board and blower relay
wire (Figure 6). Recommended wire gauge and wire
lengths for typical thermostat connections are listed in
Table 2.
• Single stage or two-stage heating thermostats can
be used with this equipment depending on optional
accessories installed with the unit. Select a thermostat
that operates in conjunction with the installed
accessories.
• The thermostat should be mounted about 5 feet above
the floor on an inside wall.DO NOT install the thermostat
on an outside wall or any other location where its
operation may be adversely affected by radiant heat from
fireplaces, sunlight, or lighting fixtures, and convective
heat from warm air registers or electrical appliances.
Refer to the thermostat manufacturer's instruction sheet
for detailed mounting information. NOTE: If installing
unit with an external furnace, refer to the installation
instructions supplied with the furnace for proper heat
anticipator setting.
• The 15 SEER air conditioner uses a special two speed
compressor to achieve a high level of efficiency in a
5 Wire 2 Stage Cool / 1 Stage Heat T-Stat
R
Y1
G
W
Y2
5 Wire 2 Stage Cool w/ Optional OD T-Stat
R
Y1
G
Y2
W1
Optional
Outdoor Thermostat
(Field Supplied)
Figure 6. Typical Wiring (Field Supplied) for 2-Stage Cool & 1 or 2-Stage Electric Heat
8
Single Stage Electric Heat
RED - 24VAC
YELLOW - S1 COOL
GREEN - FAN
]
BROWN
S1 + S2 HEAT
ORANGE
BLUE - S2 COOL
2-Stage Electric Heat
RED - 24VAC
YELLOW - S1 COOL
GREEN - FAN
BLUE - S2 COOL
BROWN - S1 HEAT
*
ORANGE - S2 HEAT
compact frame. For the highest efficiency, the use of a
2-stage Heat / Cool thermostat should be used with this
unit. The heat / cool thermostat prevents simultaneous
operation of the heating and cooling units and is
equipped with an ON-AUTO fan mode that allows the
home owner to operate the indoor blower when only
air circulation is desired.
Thermostat
Wire Gauge
24
22
20
18
Table 2. Thermostat Wire Gauge
Heat / Cool Thermostat
A 2 stage Cooling thermostat is recommended for this
product. A single or two stage heating thermostat may be
used depending on the optional accessories installed with
the unit. Install a thermostat that operates in conjunction
with the installed accessories. See Figure 6 for 5 or 6 wire
Heat / Cool applications
2 Stage Heat with Single Stage Heating Thermostat - If a
single stage heat thermostat is used and 2 stage heat is
desired, an "optional" outdoor thermostat may be installed.
Connect the "optional" outdoor thermostat between the
W1 (brown) connection and orange wire in the outdoor
unit. See Figure 6. Refer to the installation Instructions
supplied with the outdoor thermostat for setup details.
6 Wire 2 Stage Heat / Cool T-Stat
Two-Stage Electric Heat
R
Y1
G
W1
W2
Y2
*Refer to specific electric heat kit for stage 2 heat capability.
Recommended T-Stat Wire
Length (Unit to T-Stat)
2-Wire 5-Wire
(Heating) (Heating/Cooling)
55 25
90 45
140 70
225 110
RED - 24VAC
YELLOW - S1 COOL
GREEN - FAN
BROWN - S1 HEAT
*
ORANGE - S2 HEAT
BLUE - S2 COOL