12
Installation of the Unit
If the outdoor unit is installed lower than the indoor unit (See Fig.9
If the outdoor unit is installed higher than the indoor unit (See Fig.10)
(1). A drain pipe should be above ground and the end of the pipe
does not dip into water. All pipes must be restrained to the wall
by saddles.
(2). Taping pipes must be done from bottom to top.
(3). All pipes are bound together by tape and restrained to wall by
saddles.
(1). Taping should be done from lower to the upper
part.
(2). All pipes are bound and taped together and also
should be trapped to prevent water from returning
to the room.
(3). Restraint all pipes to the wall with saddles.
Fig.9
Fig.10
7. Liquid Pipe and Drain Pipe
Saddle
Sealed
Vacuum and Gas Leakage Inspection
CAUTION!
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation!
There is no extra refrigerant in the outdoor unit for air purging!
(1). Remove the caps of the liquid valve, gas valve and also the service port.
(2). Connect the hose at the low pressure side of the manifold valve assembly to the service
port of the unit’s gas valve, and meanwhile the gas and liquid valves should be kept
closed in case of refrigerant leak.
(3). Connect the hose used for evacuation to the vacuum pump.
(4). Open the switch at the lower pressure side of the manifold valve assembly and start the
vacuum pump. Meanwhile, the switch at the high pressure side of the manifold valve
assembly should be kept closed, otherwise evacuation would fail.
(5). The evacuation duration depends on the unit’s capacity, generally, 15 minutes for the
12K units, 20 minutes for the 18K units, 30 minutes for the 24/36/42K units, 45 minutes
for the 48/60K units. And verify if the pressure gauge at the low pressure side of the
manifold valve assembly reads -1.0Mp (-75cmHg), if not, it indicates there is leak
somewhere. Then, close the switch fully and then stop the vacuum pump.
1. Vacuum
