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WARNING - Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and local codes.
The 4 pins in P6 have the potential of transferring up to 250 volts to the unit cabinet ground.
Designator
Suction Pressure Out
Pressure transducer Supply Voltage Pin 1 of 3
Suction Pressure In
Pressure transducer output voltage Pin 2 of 3
Suction Pressure GND
Pressure transducer GND Pin 3 of 3
Liquid Pressure Out
Pressure transducer Supply Voltage Pin 1 of 3
Liquid Pressure In
Pressure transducer Supply Voltage Pin 2 of 3
Liquid Pressure GND
Pressure transducer GND Pin 3 of 3
Suction Line Temperature Sensor Supply - Pin
SUCT1
1 of 4
Suction Line Temperature Sensor Supply - Pin
SUCT2
2 of 4
Liquid Line Temperature Sensor Supply - Pin 3
LIQ1
of 4
Liquid Line Temperature Sensor Supply - Pin 4
LIQ2
of 4
Table 10. Outdoor Control Terminal Designations and Inputs / Outputs
Servicing Units Delivered Void of Charge
If the outdoor unit is void of refrigerant, clean the system
using the procedure described below.
1.
Leak test the system using the procedure outlined on
page 21.
2.
Evacuate the system using procedure outlined on
page 21.
3.
Use nitrogen to break the vacuum and install a new
4.
Evacuate the system again using procedure outlined
on page 21.
5.
Weigh in refrigerant using procedure outlined in Figure
50.
6.
Monitor the system to determine the amount of
moisture remaining in the oil. It may be necessary
required dryness level. If system dryness is not
31-5000746 Rev. 0
Description
Start-Up
If unit is equipped with a crankcase heater, it should
be energized 24 hours before unit start-up to prevent
compressor damage as a result of slugging.
1. Rotate fan to check for frozen bearings or binding.
2.
3.
4.
5.
.
6.
7.
8.
Page 31
Input
Output
5 VDC
0-4.5 VDC
5 VDC
0-4.5 VDC
0-4.5 VDC
0-4.5 VDC
CAUTION
connections.
After evacuation is complete, open liquid line and
suction line service valves to release refrigerant
charge (contained in outdoor unit) into system.
tighten an additional 1/6 of a turn.
Check voltage supply at the disconnect switch. The
voltage must be within the range listed on the unit
nameplate. If not, do not start equipment until the
power company has been consulted and the voltage
condition corrected.
Set the thermostat for a cooling demand. Turn on
power to the indoor indoor unit and close the outdoor
unit disconnect switch to start the unit.
Recheck voltage while the unit is running. Power must
be within range shown on the unit nameplate.
procedures outlined under Checking Refrigerant
Charge.
Common
VDC Com
VDC Com
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