Specifications

ED01-505 Installation Manual
Room Air Conditioners D-Series 29
PURGING AIR AND CHECKING GAS LEAKAGE
• 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) to operate the shut-off valve rod.
• All refrigerant pipe joints should be tightened with a torque
wrench at the specified tightening torque.
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 (–76cmHg)*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.)*2.
(5) Remove covers from liquid shut-off value and gas shut-off valve.
(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.
After the check is complete, wipe all soapy water off.
(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.)
(8) Tighten valve lids and service port caps for the liquid and gas shut-off valves with a torque wrench at the specified torques.
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.
If refrigerant gas leaks during air purging, ventilate
the room as soon as possible.
Warning
Gauge
manifold
Compound
pressure gauge
Pressure
meter
Low-pressure
valve
High-
pressure
valve
Charging
hoses
Vacuum pump
Valve lids
Service
port
Liquid
shut-off
valve
Gas
shut-off
valve
*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. 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 .
5
Bare wires
up to here
Service
lid
If the wire is
bared too much,
electric leakage
shock occur.
(1 wire – 1 terminal)
GOOD NO GOOD
GOOD NO GOOD
• How to tighten the screws on
the terminal block.
– Bare the ends of the
electric wires.
• Regarding the interconnecting
and power cables.
Warning! Never use short cables for
connecting end of conductor to each other.
– After retaining the wires,
check that all the terminal
screws are firmly tightened.
– Don’t connect together two
wires on one terminal.
Terminal block
(For interconnecting
wire)
Wire
clamp
band
Terminal block
(For power supply)
Ground terminal