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Inventor V4MFO-66B Manual

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8
A
B
C
D
Indoor unit
check point
Outdoor unit
check point
Electrical box
(2) The cut-off valves are completely closed before ex-work. Before connecting the refrigerant pipe, be
careful to check whether the valves are completely closed.
(3) The connection procedure of refrigerant pipe: first, unscrew the two valves on the outdoor unit and
the pipe-jointing nut on the indoor unit(please save them care fully). Please connect the refrigerant
pipe according to the manual, the pipe-jointing nut should be screwed tightly and no leakage.
Note: you need two wrenches to make balance.
(4) When the connection of refrigerant pipe is finished, before power on the system, you should
vacuum the indoor unit through the maintenance port on the cut-off valves, or open the high-
pressure valve, and exhaust the air through the maintenance port on the low-pressure valve
(closed). It will take about ten seconds. Then screw the maintenance port on tightly.
(When supplement the refrigerant, fill from the maintenance port of the low-pressure valves on
the outdoor unit ).
(5) Open all the valves completely before power on the system, or it will cause low efficiency.
(6) Gas leak check.
(1) Only the correctly installing of indoor and outdoor unit done, can the refrigerant pipe be
connected.
1. Connecting Of Refrigerant Pipe
Make sure no gas comes from the connections by using leak detector or soap water.
A: Lo packed valve B: Hi packed valve
C and D are ends of indoor unit connection.
Caution
Caution in Handling the Packed Valve
Outdoor unit Refrigerant Indoor unit Flare nut
Stopper
Cap
Valve stem
Valve body
Packed valve
Half union
AC
D
B
Open the valve stem until it hits against the stopper. Do not try to open it further.
Securely tighten the valve stem cap with a spanner or the link.
The bendable pipe should be used on the indoor side;
Bend angel can not exceed 90 degrees;
Bend the pipe in the middle place if possible, as for bend radius, the bigger the better;
The bendable pipe can not be bent for more than 3 times.
Notes for the bendable pipe
PIPE CONNECTION
While bending, expose the pipe by cutting the concave gap on the bending heat-insulation pipe(roll
it with soft band after bent).
To avoid pipe deformation, the radius is the bigger the better.
Use a pipe-bending device to make the compact bending pipe.
Bend the thin pipe
… 9 …


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