Air Conditioning Centre / Martin Industries Ltd
©
2004 - 2009
8
Model KFR-32GW/X1c rev. 409
5
Expelling the air in the
pipes and the indoor
unit – Pay attention to
exact timings – use a
digital watch!
You must expel all the air
from the system: moisture
or damp air in the
refrigerating system will
cause ‘sludging’ problems
with the compressor.
Please use a stop watch
or digital watch and an
assistant to accurately
time procedures
c) and e) below.
a) Take off the brass covers
from the stop valve and
T-branch valve.
b) Take off the auxiliary cover
from the T-branch valve.
c) Turn the stop valve
(BOTTOM VALVE) using a
hexagon wrench (Allen key),
anti clock-wise to an angle of 90 degrees (QUARTER OF A TURN), keep it open for 4 - 5 seconds
and then CLOSE the valve fully - for now.
d) Check whether there is any refrigerant leakage from the pipe connections, at all pipe joints, using a
mixture of washing up liquid & water in a plastic sprayer bottle, to see if any air bubbles form (you
are looking for tiny bubbles forming) on the pipe joints, tighten the nuts further if necessary, and
then recheck. Once there are no leaks, you can continue. It is extremely important that there are no
tiny leaks, otherwise you will need to have your refrigerant topped up within a short time, and your
system may be damaged!
e) Next, push in the ‘tyre inflator’ style valve on the T-branch valve (SIDE OF TOP VALVE) for 3 - 4
seconds using a screwdriver or similar, to expel the air in the pipe-work. CAUTION: use a long
enough implement as the refrigerant gas
may
be COLD in winter (not normally in summer). You
may possibly notice a slight oily residue on the tip of the screwdriver, this is normal. BUT, do not
worry, and do not release for longer than 5 seconds even if no oil is present, oil is not always seen
as it may have been very settled in your system, so none may be released from the valve.
f)
VERY IMPORTANT - Finally, open the stop and T-branch (TOP and BOTTOM VALVES) valves with
a hexagon wrench (Allen key) fully anti-clockwise until they stop (they are designed to be sealed in
the fully opened position) to allow the gas / refrigerant to freely circulate around the system. They
may be stiff, so be sure to open them fully. Then replace the 3 brass covers on all the valves
TIGHTLY, some PTFE tape on the threads of the brass covers can be used if desired, but not on
the pipe joints, only 3 in 1 oil.
Failure to open the 2 Hexagon Key valves fully may result in failure of the Compressor.
g) There must be no gas / refrigerant leaks, please check all the piping connections parts again. You
must test for leaks in all joints; generally, this can be tested with washing up liquid in water. A small
plant / window sprayer is ideal for this.
6 Electrical
connection
z
Unscrew the screws, and take off the electrical panel cover (RH handle) from the outdoor unit.
z
Your system is pre-wired to the indoor unit, but you need to connect the wires correctly to the
outdoor unit.
z
The interconnecting wires are numbered using round sleeves at the end of each terminal; connect
each numbered wire to the corresponding number on the terminal block on the outdoor unit.
z
Fasten securely the wires to the connection panel.
Screw up the connection panel cover to its original place.
