R410A Mini Split Chiller 50Hz
MCAC-ATSM-2014-01
26
13. Operation Limits
Cooling operation
Outdoor ambient temperature: 10
℃
～
43
℃
Outlet water temperature: 5
℃
-17
℃
Heating operation
Outdoor ambient temperature: -15
℃
～
24
℃
Outlet water temperature: 45
℃
-50
℃
Cooling Heating
13.1 Ethylene glycol solution
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.
Freezing point (°C)
0
-5
-10
-15
-20
-25
Percentage of ethylene glycol in weight
0
12%
20%
28%
35%
40%
cPf
1
0.98
0.97
0.965
0.96
0.955
cQ
1
1.02
1.04
1.075
1.11
1.14
cdp
1
1.07
1.11
1.18
1.22
1.24
cPf: correction factor refrigerating capacity
cQ: correction factor flow rate
cdp: correction factor pressure drop
Note:
1. During winter leaving the unit unused, please drain water out completely from unit if no antifreeze were
charged into pipeline, or keep power on (at standby or off status) and ensure that water is contained
inside of unit.
2. When ambient temperature is lower than 5
℃
, running cooling mode must be charged antifreeze. Refers
to upper parameters for the charged volume.
13.2 Fouling factor
The performance data given refer to conditions with clean evaporator plates (fouling factor=1). For different
fouling factors, multiply the figures in the performance tables by the coefficient given in the following table.
