Haier 1U24GS ERA Installation Manual page 19

Installation Procedure
WARNING:
INTERCONNECTING WIRES MUST BE WIRED ACCORDING TO FIGURE BELOW. INCORRECT WIRING MAY CAUSE
EQUIPMENT DAMAGE.
SINGLE SPLIT SYSTEM UNITS WIRING DIGRAM
1U24GS1ERA 1U28GS2ERA(S) 1U28HS1ERA(S)
1U36HS1ERA(S) 1U48LS1ERA(S)
Indoor unit
terminal block
Outdoor unit
L
terminal block
Power supply:1PH,220-230V~, 50Hz
MAXI SPLIT SYSTEM UNITS WIRING DIGRAM
terminal block
R S
1 2 3
3N~ 50Hz
380-400V
3PH TYPE
terminal block
1 2 3
Indoor unit 1
terminal block
1 2 3
Indoor unit 2
terminal block
1 2 3
Indoor unit 3
terminal block
1 2 3
Indoor unit 4
Installation Procedure
CAUTION!
THIS UNIT WILL BE STARTED INSTANTLY WITHOUT "ON" OPERATION WHEN ELECTRIC POWER IS SUPPLIED.
BE SURE TO EXECUTE "OFF" OPERATION BEFORE ELECTRIC POWER IS DISCONNECTED FOR SERVICING.
This unit has a function of automatic restart system after recovering power stoppage.
1. Before starting test run (for all Heat pump models)
Confirm whether the power source breaker (main switch) of the unit has been turned on for over 12 hrs to energize the
crankcase heater in advance of operation.
2.Test run
Run the unit continuously for about 30 minutes, and check the following.
Suction pressure at check joint of service valve for gas pipe.
Discharge pressure at check joint on the compressor discharge pipe.
Temperature difference between return air and supply air for indoor unit.
1 2 3
N 1 2 3
T N
L
1PH~ 50Hz
220-230V
1PH TYPE
master
slave
slave
slave
1U48LS1ERB(S) 1U48LS1EAB (S) 1U48IS1EAB
1U48IS1ERB(S) 1U60IS1ERB(S) 1U60IS1EAB(S)
1U60IS2EAB(S) 1U60IS2ERB(S)
Y/G
Outdoor unit
terminal block
Y/G
Power supply:380-400V, 3N~,50Hz
N
Note:
1.The master is the indoor unit which connect to a wired
controller,others are slaves,please purchase wired controller
separately for MAXI system.
2.For one MAXI split system there is only one master.
3.For the MAXI system with 2 or 3 indoor units, the wiring
method is the same with the diagram on the left except for
the indoor units quantity.
4.Make sure that the wire connection for all units in MAXI
system OK before running.
17
Electrical Wiring
Indoor unit 1
terminal block
R S T N 1
2 3
Y/G
2 3
Y/G
Test Run