HISEER AS10/LF, Руководство по эксплуатации, установке и обслуживанию

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15
Pipe connections
NOTE!
The pipe work must be flushed before the heat pump
is connected, so that any contaminants do not damage
the components parts.
The water pressure in the heat exchanger can not
exceed 0.5Mpa.
· Aim the flare connection of copper coil at the center of
screw connection of heat pump , screw the flare nut
as tightly as possible manually.
· Tighten the flare nut to required torque with a torque
wrench
Pressure test and leak test
The pipe connection between indoor and outdoor unit
must be pressure tested and leak tested after installation.
Only nitrogen could be used when pressurizing and
flushing the system.
Use a vacuum pump to evacuate all air .Vacuum for at
least one hour and end pressure after evacuation must
be 1mbar absolute pressure.
If the system has remaining moisture or a leak, the
vacuum pressure will rise after completed evacuation.
Filling refrigerant:
After finishing pipe connections, pressure test ,leak test
and vacuuming, the service valves can be opened.
The gas inside the indoor unit is enough for 5m pipe.
If connection pipe is longer than 5m, need to re-fill
some R410A refrigerant. Filling weight is 50g per extra
meter.
Insulating refrigerant pipes
Insulate refrigerant pipes for heat insulation and to
prevent condensate.
Use insulation that can withstand at least 120
℃
.
The insulation should be at least 13 mm think.