Air-to-water Heat Pump Split Versati
22
SPLIT TYPE
7.8 Selection of expansion vessel
Formula:
V--- Volume of expansion vessel
C--- Total water volume
P
1
--- Pre-set pressure of expansion vessel
P
2
-- The highest pressure during running of the system (that is the action pressure of safety valve.)
e---The expansion factor of water (the difference between the expansion factor of the original water temperature
and that of highest water temperature.)
Water expansion factor in different temperature
Temperature(°C)
Expansion factor e
0
0.00013
4
0
10
0.00027
20
0.00177
30
0.00435
40
0.00782
45
0.0099
50
0.0121
55
0.0145
60
0.0171
65
0.0198
70
0.0227
75
0.0258
80
0.029
85
0.0324
90
0.0359
95
0.0396
100
0.0434
8. Connection of Pipeline
8.1 Connection of outlet pipe for indoor & outdoor unit
(1)
Align the expansion end of copper pipe with the center of threaded joint. Tighten the flaring nuts with your
hands.
(2)
Tighten the flaring nuts with torque wrench until you hear a “click”.
(3)
Bend of fitting pipe shall not be too low; otherwise the fitting pipe might crack. Please use pipe bender when
bending the fitting pipe.
(4) When connecting outdoor and indoor unit, never pull the big and small joint of indoor unit with force, so as
to prevent the tubes of indoor unit from cracking and causing leakage.
(5) Connecting pipe shall be supported by a rack without transmitting its weight to other units.
