System Startup - Haier AC-8888-107 Service Manual

Model Min. ampacity
(indoor units)
HB2400VA1M20
HB2400VC1M20
HB3000VA1M20
HB3600VA1M20
HB3600VC1M25
HB4200VA1M25
HB4800VA1M25
HB6000VA1M25
HB6000VC1M25
A MEANS OF STRAIN RELIEF MUST BE INSTALLED TO THIS APPLIANCE AT THE
ELECTRICAL SERVICE ENTRANCE.
When an optional electric heat kit is installed refer to the electrical requirements for that kit. The
ampacity and over-current protection shown above is onl y for "HB" air handlers installed without
.
a heat kit

8.10.SYSTEM STARTUP

1.Turn thermostat to "OFF", turn on power supply at disconnect switch.
2.Turn temperature setting as high as it will go.
3.Turn fan switch to "ON". Indoor blower should run. Be sure it is running in the right direction.
4.Turn fan switch to "AUTO". Turn system switch to "COOL" and turn temperature setting below
room temperature. Unit should run in cooling mode.
5.Check to see if compressor and outdoor fan are running correctly?
6.Check the refrigerant charge (see Instructions under "Charging the System").
7.Replace service port caps. Service port cores are for system access only and will leak if
not tightly capped.
8.Check unit for tubing and sheet metal rattles.
9.Instruct the owner on operation and maintenance.
Leave this "Installation and Operating Manual" and the "Use and Care Manual" with owner.
8.11.OPERATION
SEQUENCE OF OPERATION
In order to service and troubleshoot a air conditioning system a service technician must
understand the unit's sequence of operation. this is the order of events the system undergoes to
cycle itself on and off. Knowing how the units operate properly aids in determining where to start
troubleshooting when the unit doesn't operate properly .Where the system varies from its normal
sequence is a major clue to any problems.
COOLING CYCLE
Mechanical . the operation sequence as follows:
1. The compressor pumps out high pressure ,superheated refrigerant vapor.
2. The vapor leaves the compressor and passes through the reversing valve.
3. It flows through the outdoor vapor line to the finned outdoor coil. Air from the outdoor fan
removes heat from the refrigerant vapor .When enough heat is removed ,the vapor
condenses into a high pressure liquid .The liquid temperature is slightly warmer than ambient
air temperature.
30
Commercial Air Conditioner
TABLE 8-4
Max.Over-
current(A)
208/230V
208/230V
/ 15/15
/ 15/15
/ 15/15
/ 15/15
/ 15/15
/ 15/15
/ 15/15
/ 15/15
/ 15/15
Model: cooling only, 10SEER UNITS
Fan motor Blower motor
capacitor(UF) FLA
8 0.9
8 0.9
7.5 2.3
7.5 2.3
7.5 2.3
7.5 2.2
7.5 2.2
12 4
12 4
Blower motor
HP
1/8
1/8
1/3
1/3
1/3
1/2
1/2
3/4
3/4