Blueridge BM12MCC Installation Manual - Page 12
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Refrigerant Piping Installation
WARNING
All field piping must be provided by a licensed refrigeration technician and must comply with the
relevant local and national codes
CAUTION
•
DO NOT mix anything other than the specified refrigerant, such as air, etc., inside the refrigerant
circuit.
•
Execute heat insulation work completely on both sides of the gas piping and liquid piping.
Otherwise, this can sometimes result in water leakage. (When using a heat pump, the
temperature of the gas piping can reach up to approximately 248° F. Use insulation which is
sufficiently resistant.)
•
Also, in cases where the temperature and humidity of the refrigerant piping sections might
exceed 86° F or Rh80%, reinforce the refrigerant insulation (3/4" or thicker). Condensation may
form on the surface of the insulating material.
•
Before rigging tubes, check which type of refrigerant is used.
•
Use a pipe cutter and flare suitable for used refrigerant.
•
Only use annealed material for flare connections.
•
If the refrigerant gas leaks during the work, ventilate the area. A toxic gas is emitted by the
refrigerant gas being exposed to a fire.
•
Make sure there is no refrigerant gas leak. A toxic gas may be released by the refrigerant gas
leaking indoor and being exposed to flames from an area heater, cooking stove, etc.
Refer to the Fig 5.1 for the dimensions of flare nuts spaces and the appropriate tightening
•
torque. (Over-tightening may damage the flare and cause leaks.)
•
Check whether the height drop between the indoor unit and outdoor unit, and the length of
refrigerant pipe meet the following requirements in Fig 5.2:
Pipe
Flaring
gauge
torque
1/4"
14 ft/ lbs
3/8"
18 ft/ lbs
1/2"
26 ft/ lbs
5/8"
34 ft/ lbs
The type of models
R410A inverter
Split type air conditioner
Page 12
Flare dimension
Flare shape
(A) (Unit: Inch)
Min.
Max.
90 ° ± 4
0.33
0.34
0.52
0.53
0.64
0.65
0.76
0.78
Capacity
(Btu/h)
12K
18K
A
R0.4~0.8
Fig 5.1
Max.allowable
piping length
82ft
98.4ft
5
Max.allowable
piping height
32.8ft
65.6ft
Fig 5.2
Revised 5/14/2020