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1.5 ARC / ARH units with auxiliary heating element
The power supply to the heating resistor must be independent to the general power supply to the unit
and must be fitted with its own circuit breaker according to the table:
Power
ARC Model
supply
V/Ph/Hz
100
400/3/50
125
400/3/50
150
400/3/50
175
400/3/50
(1) K Curve (DIN, VDE 0660-104).
(2) Based on copper conductors 105 °C.
1.6 Limits of use
Model
Voltage limits
Temperature of air inlet in indoor coil
Outdoor temperature (without condensa‐
tion control)
ARC
Maximum outdoor tempera‐
ture (1)
Temperature of air inlet in indoor coil
Outdoor temperature (without condensa‐
Summer
tion control)
cycle
ARH
Maximum outdoor tempera‐
ture (1)
Temperature of air inlet in indoor coil
Winter
cycle
Outdoor temperature
1. Direct sunlight on the unit should be prevented when temperatures are higher than 43 °C. If placed under some kind of protective cover, the cover should not interfere
with the flow of outdoor ventilation.
2. The gas heating units (ARG/ARD) are only appropriate for use with gas. In LPG (Liquefied Petroleum Gas, propane) installations, it must be ensured that in no case
should gasoline in liquid form reach the gas group.
DB: Dry-bulb Thermometer; TH: Wet-bulb thermometer.
ARC / ARH units with auxiliary heating element
Heating element
Power
Stages (No.)
(kW)
37
2
50
2
37
2
50
2
37
2
50
2
60
2
37
2
50
2
60
2
Min./Max V
WB °C Min./Max.
DB °C Min/Max
TS °C Min.
At full
TS °C
load
At partial
TS °C
load
WB °C Min./Max.
DB °C Min/Max
TS °C Min.
At full
TS °C
load
At partial
TS °C
load
DB °C Min/Max
DB °C Min/Max
Installation manual
Maximum circuit breaker
Current
(K Curve) (1)
(A)
54
63
72
80
54
63
72
80
54
63
72
80
87
100
54
63
72
80
87
100
100
125
15/23
15/23
20/32
20/32
10
10
46
46
52
52
15/23
15/23
20/32
20/32
10
10
46
46
52
52
10/25
10/25
-10/20
-10/20
1
1.5
Minimum cable cross-section
2
(mm
) (2)
16
25
16
25
16
25
35
16
25
35
150
175
342/457
15/23
15/23
20/32
20/32
7
7
46
46
52
52
15/23
14/23
20/32
20/32
7
7
46
46
52
52
10/25
10/25
-10/20
-10/20
9
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