Airwell YCV280, Инструкция по установке и обслуживанию

Страница: 265 / 412

2.4 Field refrigerant piping
Treatment for pipes to prevent compressor being blocked
Compressor failure includes being blocked and motor burnt. It manybe because of damaged parts, but mainly it is
relative to the installation and the pipe specification.
Measures to prevent piping failure
A. Charge nitrogen fluently
1)Non-flow nitrogen will produce the film (CU
2
O). The oxide film will cause the serious failure.
2)The exterior substance will cause the capillary or the expansion valve blocked, abnormal discharging temperature,
not cooling or heating, compressor locked, etc.
B. Do not let water into the pipe.
1)Do not install the pipe when raining.
2)Hang and fix the outdoor pipe to prevent water into it. The water in pipe will cause the following effect: the capillary
or the expansion valve blocked, refrigerant hydrolized into acid substance, cause abnormal crystal by refrigerant oil
reaction.
C. Do not let dust or other matter such as the concrete fragment, sand, or the clinker etc into the pipe. Please deal
with them carefully.
D. Adopt the specified copper pipe.
too thick or
too long
abnormal discharging
oil return difficult
compressor
locked
E. Fix the refrigerant pipe
1)In operation, the pipe will vibrate and expand or shrink. If not being fixed, the refrigerant will focus on one part to
cause the broken pipe.
2)To prevent the central stress, fix the pipe for every 2-3m.
Heat insulation (Gas pipe, liquid pipe and oil equalization pipe must be treated with the heat
insulation material against heat release and condensate)
A. The heat insulation material can prevent the condensate caused on gas pipe, which will result in leakage; and
the material can prevent someone being scalded for the high temperature on the gas pipe.
B. Wrap the indoor connection pipe with the heat insulation material.
1)Gas pipe and liquid pipe should be heat insulated separately.
2)The material for gas pipe should endure the high temperature over 120 C.
3)The material thickness should be over 10mm, when ambient temp. is 30 C, and the relative humidity is over 80%,
the material thickness should be over 15mm.
C. The material should cling the pipe closely without gap, then be wrapped with adhesive tape. The connection wire
can not be put together with the heat insulation material and should be far at least 20cm.
271