Technical data
Installation, user and maintenance manual – GAHP-GS/WS
13
GAHP GS LT GAHP GS HT
Size
width mm 848 (6)
height mm 1278
depth mm 690
Weight In operation kg 300
GENERAL INFORMATION
INSTALLATION MODE C13, C33, C43, C53, C63, C83, B23P, B33
COOLING FLUID
AMMONIA R717 kg 7
WATER H2O kg 10
MAXIMUM PRESSURE OF THE COOLING CIRCUIT bar 35
* data tested by VDE and DVGW-Forschungsstelle.
** in transient operation, lower temperatures are allowed
Notes:
 As per EN12309-2 evaluated on actual thermal capacity. For operating conditions 1. 
other than nominal, refer to the Design Manual.
 For flow rates different from the nominal refer to the Design Manual.2. 
 PCI 34.02 MJ/m3 (1013 mbar – 15 ° C).3. 
 PCI 46.34 MJ/kg (1013 mbar – 15 ° C).4. 
 ± 10% depending on power voltage and absorption tolerance of electric motors.5. 
 Overall dimensions excluding fumes pipes (see Figure 3.1 Size 6.  → 15).
 Free field, frontal, directionality factor 2.7. 
Table 3.2 – WS technical data
GAHP WS
OPERATION WHEN HEATING
OPERATING POINT W10W50
G.U.E. gas usage efficiency % 166 (1)
Thermal power delivered kW 41,6 (1)
Power recovered from 
renewable source
kW 16,6
OPERATING POINT W10W65
G.U.E. gas usage efficiency % 143 (1)
Thermal power delivered kW 35,8 (1)
Power recovered from 
renewable source
kW 11,5
Thermal capacity
Nominal (1013 mbar - 15°C) kW 25,7
true peak kW 25,2
NOx emission class 5
NOx emission ppm 25
CO emission ppm 36
Hot water delivery temperature
maximum for heating °C 65
maximum for DHW °C 70
Hot water return temperature
maximum heating °C 55
minimum temperature in 
continuous operation** 
°C 20
Hot water flow rate
nominal l/h 3570
maximum l/h 4000
minimum l/h 1400
Hot water pressure drop
for nominal water flow 
rate(W10W50)
bar 0,57 (2)
Ambient air temperature (dry bulb)
maximum °C 45
minimum °C 0
Thermal differential nominal °C 10
gas consumption
methane G20 (nominal) m3/h 2,72 (3)
G30 (nominal) kg/h 2,03 (4)
G31 (nominal) kg/h 2,00 (4)
RENEWABLE SOURCE OPERATING CONDITIONS
Renewable source water flow rate
nominal (W10W50) l/h 2850
maximum l/h 4700
minimum l/h 2300
Renewable source pressure drop at nominal flow rate bar 0,38 (2)
Renewable source water return temperature maximum °C 45
Renewable source delivery water temperature  minimum °C 3
ELECTRICAL SPECIFICATIONS










