Operation Limits - Sinclair SCV-50EA Service Manual

10. Operation Limits

COOLING
C
46
35
20
-5
-
-10 4 5 7
DELIVERY WATER TEMPERATURE
HEATING
C
27
20
7
-3
-15
30 35
DELIVERY WATER TEMPERATURE
a) Ethylene Glycol Solutions
Water and ethylene glycol solutions used as a thermal vector in the place of water reduce the performance
of the unit. Multiply the performance figures by the values given in the following table.
cPf
cQ
cdp
cPf: correction factor of heating/cooling capacity
cQ: correction factor of flow rate
cdp: correction factor of pressure drop
15 20
45 55
0 -5
Percentage of ethylene glycol in weight
0 12%
1 0.98
1 1.02
1 1.07
C
C
Freezing point (°C)
-10
20%
0.97 0.965
1.04 1.075
1.11
24
-15 -20
28% 35%
0.96
1.11
1.18 1.22
-25
40%
0.955
1.14
1.24