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Caution:
After the confirmation
of the above conditions,
prepare the wiring as follows:
1. Never fail to have an individual
power circuit specifically
for the air
conditioner.
As for the method of wiring, be guided by the circuit diagram
posted on the inside of control cover.
2. The screw which fasten the wiring in the casing of electrical
fittings are
liable to come loose from vibrations
to which the unit is subjected
during
the course of transportation.
Check them and make sure that they are al!
tightly fastened.
(tf they are loose, it could cause burn-out
of the wires.)
3. Specification
of power source.
4. Confirm that electrical
capacity
is sufficient.
5. See to that the starting voltage is maintained
at more than 90 percent of the
rated voltage marked on the name plate.
6. Confirm that the cable thickness
is as specified
in the power source
specification.
7. Always install an earth leakage circuit breaker in a wet or moist area.
8. The following
would be caused by voltage drop. Vibration
of a magnetic
switch, which wi!l damage the contact
point, fuse breaking, disturbance
of
the normal function
of the overload.
9. The means for disconnection
from a power supply shall be incorporated
in
the fixed wiring and have an air gap contact separation
of at least 3mm in
each active (phase) conductors.
Air purge
The air and moisture that remain in the refrigeration
system have undesirable
effects, as detailed below:
1. Pressure in the system rises.
2. IOperating current rises..
3
Cooling or heating efficiency drops.
4. TMoisture
in the refrigerant
circuit
may freeze and block capillary
tubing.
5. VVater may lead to corrosion of
parts in the refrigeration
system.
6. Therefore,
the indoor unit and
tubing between the indoor and
outdoor unit must be leak tested
and evacuated to remove any
noncondensables
and moisture
from the system..
Air purging with vacuum pump
1. Check that each tube (both liquid and gas side tubes) between the indoor
and outdoor
units have been properly connected
and all wiring for the test
run has been completed.
Remove the service valve caps from both the gas
and the liquid side on the outdoor
unit. Note that both the liquid and the gas
side service valves on the outdoor
unit are kept closed at this stage.
2. When relocate the unit to another place, perform
evacuation
using vacuum
pump.
3. To type refrigerant
R407C, make sure the refrigerant
added into the air
conditioner
is liquid form in any case.
4. Pipe length and refrigerant
amount:
Caution
in handling
the packed valve
1. Open the valve stem until it hits against the stopper. Do not try to open it
further.
2. Securely tighten the valve stem cap with aspanner or the like. Valve stem cap
tightening
torque (See tightening
torque table in page 17).
Refrigerant
_//
Flare nut
7"
outdoor
unit
indoor
unit
A
Gas
C --
Stopper
Half union
Valve body
'
_
Packed
valve
Valv_ stem
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