Hitachi RAM-10MQ, Installation & Maintenance Manual

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2) Drain connector installation methods:
1.Set the washer on the upper part of drain connector.
2.According to the shape of base drain holes, insert
the drain connector and turn it clockwise about 40°.
3.Drain connector is equivalent to VP20.
4.Drain pipe is field supplied.
Note
：
The drain connector is installed
for discharging condensation water
5. Refrigerant Piping
(1) Refrigerant Piping
1) Selection of refrigerant pipes
1.Please prepare field supplied copper pipes.
2.Select the piping size as the table below.
3.Select clean copper pipes. Be sure that there is no dust and moisture inside of the pipes.
●
Cut the copper pipes with a pipe cutter. Blow the inside of the pipes with nitrogen or dry air to remove dust or foreign
materials before connecting pipes. (Do not use a saw, a grindstone or other tool which may cause cutting powder.)
●
Cautions for refrigerant piping
2) Refrigerant piping limitation and multi-kit
1.The order of piping connection kit is counted from the indoor unit side(as Branch Pipe 1).
2.When the maximum length of the equivalent refrigerant pipe(L1)from First Multi-kit to the indoor unit is over 100mm, the
size of gas/liquid pipes from the Piping Connection Kit 1 to the First Multi-kit should be increased one size with the
reducer(field-supplied).
3.The size of multi-kit between the indoor units should be the same as the size of the indoor unit pipes.
4.When the liquid piping length is longer than 15m, please use
φ
9.53 pipe(field-supplied).
5.Keep the straight line distance longer than 500mm or more after the piping connection kit.
6.The condition of refrigerant piping installation varies depending on the quantity of indoor units.
7.Due to the maximum charging of refrigerant, the total piping length should be less than 1,000m.
Piping between Outdoor Unit and First Multi-kit
HP
Gas/Liquid Pipe Size ( Φ mm)
Equivalent Length
＜
100m Equivalent Length
≧
100m
8 19.05 / 9.53 22.2 / 12.7
10 22.2 / 9.53 25.4 / 12.7
12~14 25.4 / 12.7 28.6 / 15.88
16 28.6 / 12.7 31.75 / 15.88
18~24 28.6 / 15.88 31.75 / 19.05
26~34 31.75 / 19.05 34.9 / 22.2
36~54 38.1 / 19.05 41.3 / 22.2
配管不可直接放到地上
Convex
Drain Connector
Base Drain
Hole
Washer
Drain Pipe
(Field Supplied)
Drain Connector
When installing pipe through the wall,
secure a cap at the end of the pipe.
CORRECT
CORRECT
CORRECT
INCORRECT
INCORRECT
INCORRECT
Hole Hole
Attach a cap or vinyl tape
Do not place the pipe directly on the
ground.
Attach a cap or vinyl tape
Attach a cap or vinyl bag with rubber
band.
Rain water can enter
CORRECT