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
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