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:
ARC Model
Power
supply
V/Ph/Hz
Heating element
Maximum circuit breaker
(K Curve) (1)
Minimum cable cross-section
(mm
2
) (2)
Power
(kW)
Stages (No.)
Current
(A)
100
400/3/50
37
2
54
63
16
50
2
72
80
25
125
400/3/50
37
2
54
63
16
50
2
72
80
25
150
400/3/50
37
2
54
63
16
50
2
72
80
25
60
2
87
100
35
175
400/3/50
37
2
54
63
16
50
2
72
80
25
60
2
87
100
35
(1) K Curve (DIN, VDE 0660-104).
(2) Based on copper conductors 105 °C.
1.6 Limits of use
Model
100
125
150
175
Voltage limits
Min./Max V
342/457
ARC
Temperature of air inlet in indoor coil
WB °C Min./Max.
15/23
15/23
15/23
15/23
DB °C Min/Max
20/32
20/32
20/32
20/32
Outdoor temperature (without condensa‐
tion control)
TS °C Min.
10
10
7
7
Maximum outdoor tempera‐
ture (1)
At full
load
TS °C
46
46
46
46
At partial
load
TS °C
52
52
52
52
ARH
Summer
cycle
Temperature of air inlet in indoor coil
WB °C Min./Max.
15/23
15/23
15/23
14/23
DB °C Min/Max
20/32
20/32
20/32
20/32
Outdoor temperature (without condensa‐
tion control)
TS °C Min.
10
10
7
7
Maximum outdoor tempera‐
ture (1)
At full
load
TS °C
46
46
46
46
At partial
load
TS °C
52
52
52
52
Winter
cycle
Temperature of air inlet in indoor coil
DB °C Min/Max
10/25
10/25
10/25
10/25
Outdoor temperature
DB °C Min/Max
-10/20
-10/20
-10/20
-10/20
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.
Installation manual
1
ARC / ARH units with auxiliary heating element
1.5
9