bm
INSTALLATION OF THE THROTTLE
(FOR SOME MODELS)
PRECAUTIONS
• For ensuring throttled efficiency, please mount the
throttle as horizontally as possible.
• Wrap the supplied anti-shock rubber at external of
the throttle for noise.
PURGING AIR AND CHECKING GAS LEAKAGE
• When piping work is completed, it is necessary to
purge the air and check for gas leakage.
1 Throttle
2 Liquid pipe
3 Gas pipe
500mm/19.7"
1
2
3
Indoor
Indoor
Indoor
Outdoor
Outdoor
Outdoor
Anti-shock rubber
Throttle
1
2
WARNING
•
DO NOT
mix any substance other than the specified
refrigerant into the refrigeration cycle.
• When refrigerant gas leaks occur, ventilate the
room as soon as possible.
• The specified refrigerant should always be recovered
and never be released directly into the environment
• Use a vacuum pump for the specified refrigerant.
Using the same vacuum pump for different refrigerants
may damage the vacuum pump or the unit.
• If using additional refrigerant, perform air purging
from the refrigerant pipes and indoor unit using a
vacuum pump, then charge additional refrigerant.
• Use a hexagonal wrench 4mm/0.2" to operate
the stop valve rod.
• All refrigerant pipe joints should be tightened
with a torque wrench at the specified tightening torque.
1 Connect projection side of charging hose (which
comes from gauge manifold) to gas stop valve's
service port.
2 Full open gauge manifold's low-pressure valve (Lo)
and completely close its high-pressure valve (Hi) (High-
pressure valve subsequently requires no operation.)
3 Do vacuum pumping and make sure that the
compound pressure gauge reads -0.1MPa (-76cmHg).
See *1 table below.
4 Close gauge manifold's low-pressure valve (Lo)
and stop vacuum pump. (Keep this state for a few
minutes to make sure that the compound pressure
gauge pointer does not swing back).*2
5 Remove caps from liquid stop valve and gas stop valve.
6 Turn the liquid stop valve's rod 90˚ counterclockwise
with a hexagonal wrench to open valve. Close it after 5
seconds, and check for gas leakage. Using soapy
water, check for gas leakage from indoor unit's flare
and outdoor unit's flare and valve rods. After the
check is complete, wipe all soapy water off.
7 Disconnect charging hose from gas stop valve's
service port then fully open liquid and gas stop
valves. (
DO NOT
attempt to turn valve rod beyond
its stop.)
8 Tighten valve caps and service port caps for the
liquid and gas stop valves with a torque wrench
at the specified torques.
*1 Pipe length vs. vacuum pump run time
*2 If the compound pressure gauge pointer swings
back, refrigerant may have water content or a
loose pipe joint may exists. Check all pipe joints
and retighten nuts as needed, then repeat steps 2)
through 4).
Pipe length
Up to 15m/49.2'
More than 15m/49.2'
Not less than 15min
Not less than 10min
Run time
