Daikin FT50BVM [31/58] Disconnect charging hose from gas shut off valve s service port then fully open liquid and gas shut off valves do not attempt to turn valve rod beyond its stop

Daikin FT50BVM [31/58] Disconnect charging hose from gas shut off valve s service port then fully open liquid and gas shut off valves do not attempt to turn valve rod beyond its stop
Installation Manual ED01-325
30 Room Air Conditioners B-Series
PURGING AIR AND CHECKING GAS LEAKAGE
4
Do not mix any substance other than the specified
refrigerant (R22) into the refrigeration cycle.
Warning
To prevent air pollution, a vacuum pump should be used for air purging wherever possible.
Refrigerant gas leaks during air purging, ventilate
the room as soon as possible.
Warning
*1. Pipe length vs. vacuum pump run time
Pipe length
Run time
Up to 15 metres
Not less than 10 min.
More than 15 metres
Not less than 15 min.
WIRING
• For interconnecting wire connections, see INDOOR UNIT , 4. WIRING .
• Firmly tighten terminal
screws.
• For wire termination at
terminal block, see the
figure at right.
• For wire stripping, see
the figure at rigth.
5
Terminal block
Supply
terminal block
Strip wire and this point.
Excessive strip length may cause
electrical shock or leskage.
Wire
Be sure to estabish. Do not earth the utiilty pipe, arrester, or telephone earth.
Interconnecting wire
terminal block
Wire retaine
Shape wires so that the
service lid fits securely.
Use the specified
wire type for all
connecitions.
Firmly secure wire
retainer so wire
teminations will
not receive
external stress.
Gauge
manifold
Compound
pressure gauge
Pressure meter
Low-pressure
valve
Charging
hoses
Vacuum pump
Valve lids
Service port
Liquid
shut-off
valve
Gas
shut-off
valve
High-pressure
valve
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 (4 mm) to operate the shut-
off valve rod.
All refrigerant pipe joints should be tightened with a
torque wrench at the specified tightening torque.
*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).
(1) Connect projection side (on which worm pin is pressed) of charging hose (which comes from
gauge manifold) to gas shut-off valve’s service port.
(2)
Fully 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
(-76 cmHg)*1.
(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.)*
(7)
Disconnect charging hose from gas shut-off valve’s service port, then fully open liquid and gas shut-off valves.
(Do not attempt to turn valve rod beyond its stop.)
(6)
Turn the liquid shut-off valve’s rod 90 degrees 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.
(5) Remove covers from liquid shut-off value and gas shut-off valve.
(8)
Tighten valve lids and service port caps for the liquid and gas shut-off valves with a torque wrench at
the specified torques.

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