Gree GRS-CQ6.0Pd/NhH-E - Water Volume and Expansion Vessel Pressure; Selection of Expansion Vessel

Air-to-water Heat Pump Split Versati
22
SPLIT TYPE
7.7 Water volume and expansion vessel pressure
Pre-pressure in expension vessel(Bar)
Maximum total water volume(liter)
2.5
2.0
1.5
1.0
0.5
0.0
0 50 100 150 200 250 300 350 400
Notes
(a) 
(b) 
pressure should be adjusted to secure proper operation. If the indoor unit is located at the highest position,

(c) 
(d) 
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(
ć
) Expansion factor e
0 0.00013
40
10 0.00027
20 0.00177
30 0.00435
40 0.00782
45 0.0099
50 0.0121
55 0.0145
60 0.0171