Electrical Wiring - Lennox LPH036-160P434 User And Installation Manual

6. ELECTRICAL WIRING

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6 1 Protections and safety control
l When power to the unit, the unit will be test and lasting for about 3 mintues and then
recovery, which is a normal circumstance for the unit. This time include the compressor
first start 3 mintues delay.
l Minutes delay for the compressor start-up
l At the beginning of energizing or after the stop of the compressor, 3-minutes delay will be taken
to start the compressor.
l When switchover between cooling/heating mode, the compressor stops automatically.
l Compressor discharge gas temperature switch protection
l When compressor discharge gas temperature
closed. At the same time, the corresponding compressor will be shut off.
l Reverse phase protection relay
l The reverse phase protection relay will make the compressor not start, when the power source
is incorrectly connected.
l The checking of phase' order is just carried out at the first time of electrifying. If malfunction
happens then the checking will be going on until the order of phase is right, and the F9 will be
displayed on the board. If there is no problem in the first checking, then it will be omitted.
l High pressure and low pressure protection
l The ON/OFF of high pressure and low pressure will be installed separately around inlet pipe,
and both are connected to Main Control Board. The ON/OFF of high pressure will be off when
the pressure is higher than 652Psi. The ON/OFF of low pressure will be off when lower than
7Psi.
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6 2 Electrical data
Tab 6 1
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Nominal ton
Model type
Type of flow
Unit main
power
Applicable
voltage
Compressor
motor
Evaporator
fan motor
Condenser
fan motor
l VOL: Unit Power Supply Rated Voltage(V) Hz: Frequency(Hz) STC: Starting Current(A) RNC:
Running Current(A) IPT: Input(kW)
3TONS
C/O
Hor.
VOL 208-230V 208-230V 208-230V 208-230V 208-230V 208-230V
Hz 60
Max. 253
Min. 187
STC 22.5
RNC 11.9
IPT 2.71
RNC 1.36
IPT 0.31
RNC 1.12
IPT 0.25
>2 48 , discharge gas temperature switch will be
℉
4TONS
H/P C/O
Hor. Hor. Hor.
60 60
253 253
187 187
22.5 26
11.9 18.6 17.5
2.71 4.16 3.98
2.0 2.87 2.54
0.26 0.66 0.33
1.12 2.25 2.25
0.25 0.52 0.52
9
5TONS
H/P C/O H/P
Hor. Hor.
60 60 60
253 253 253
187 187 187
42 32.8 45
21.6 21
4.72 4.74
2.87 3.23
0.66 0.44
2.25 2.25
0.52 0.52