Blower Speed; Standard Psc Motor; High Efficiency Ecm Motor; Startup & Adjustments - Nordyne P5RD Series User's Manual & Installation Instructions

2 WIRE COOLING THERMOSTAT
............... / YELLOW
GREEN
BROWN
CONTROL WIRE LEGEND:
GREEN - Blower Relay
RED - Transformer (24V)
YELLOW - Cooling 1st Stage
BROWN - Heating 1st Stage
ORANGE - Heating 2nd Stage
4 WIRE HEAT/COOL THERMOSTAT
Lq--REO
_L_q- YELLOW
I GREEN
4 --BROWN
ORANGE
Single Stage Electric Heat
REO
--' --q--YELLOW
--I-S_-- GREEN
----I-- BROWN
.......... _ _ORANGE
Two Stage
Heating T-Stat
Figure 9. Low Voltage Connections
Blower Speed
For optimum system performance and comfort, it may be
necessary to change the factory speed setting.
ZLWARNING:
To avoid electric shock, personal injury, or death,
turn off the electric power at the disconnect
or the main service panel before making any
electrical connections.
Standard PSC Motor
1. Disconnect all electrical power to the unit and remove
the service panel.
2. Place the desired blower speed lead on the COM
terminal of the fan control board. Use another wire tie
(field supplied) to bundle the remaining motor leads.
Hiqh Efficiency ECM Motor
1. Disconnect all electrical power to the unit and remove
the service panel.
CAUTION'.
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
2. Locate the orange and red wires terminated to the blower
motor. The orange wire controls cooling operation and
the red wire controls the heating operation.
CAUTION'.
To avoid personal injury or property damage,
make sure the motor leads cannot come into
contact with any metal components of the unit.
Thermostat
Wire Gauge
24
22
20
18
Recommended T-Stat Wire
Length (Unit to T-Stat)
2-Wire
(Heating)
55
90
140
225
5-Wire
(Heating/Cooling)
25
45
7O
110
Table 2. Thermostat Wire Gauge
3. Verify the required speed from the airflow data found
in Table 3. Place appropriate wire on the appropriate
motor speed tap for the required airflow.
4. Check all factory wiring as shown in the wiring diagram
and inspect the connections to make sure none of them
loosened during shipping or installation.
START UP & ADJUSTMENTS
Pre-Start Checklist
The following check list should be observed prior to
starting the unit.
_/ Verify the unit is level and allows proper condensate
drainage.
_/ Verify the outdoor coil and top of the unit are free from
obstructions and debris, and all equipment access/
control panels are in place. Unit must be installed with
the proper clearances as shown on page 5.
_/ Verify that the duct work is sealed to prevent air leakage.
_/ Verify that the line voltage power leads are securely
connected and the unit is properly grounded. Check
the condenser fan to make sure it turns freely.
_/ Verify the thermostat is wired correctly and installed
in a proper location. Make sure the low voltage wires
are securely connected to the correct leads on the low
voltage terminal strip.
_/ Verify that the power supply branch circuit overcurrent
protection is sized properly.
Start-Up Procedure
The control circuit consists of an anti-short cycle timer that
will not let the compressor re-start before three minutes
have elapsed.
1. Set the system mode to OFF and the temperature mode
to its highest setting.
2. Turn power on at the disconnect switch.
3. Set the system mode to ON or COOL.
4. Set the temperature mode below room temperature.
Verify that the indoor blower, outdoor fan, and
compressor energize and the cooling function starts.
5. Verify the discharge air grilles are adjusted and the
system air is balanced.
6. Verify the duct work has no air leaks.
7. Verify the condensate drain is installed correctly and
functions properly.
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