Technical data

Installation, user and maintenance manual – GAHP-GS/WS
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Version • HT: optimised for high temperature heating systems (radiators, fan coils);
it produces hot water to +65°C for heating purposes and up to +70°C for sanitary
hot water.
Version • LT: optimised for low temperature distribution systems (heating floor, low
temperature radiators); it produces hot water up to +55°C in heating mode and up
to +70°C in Domestic Hot Water mode.
The modulating function (both in terms of combustion and flow rate) combined with
fumes condensation results in efficiencies of up to 172%.
The GAHP-GS/WS can operate in ambient temperatures of 0°C to +45°C.
The GAHP heat pump can be controlled with the CCP/DDC or with a switch on the con-
sent circuit.
During operation, combustion products are exhausted via the discharge terminal at the
left side of the appliance (see Figure 3.1 Size → 15). The fumes outlet must be connected
to a flue (for further details, see Paragraph 5.7 EXHAUST FLUE GAS → 37).
The appliance powered by 230 V 1N 50 Hz electrical power - .
3.3 TECHNICAL MANUFACTURING CHARACTERISTICS
The appliance is supplied with the following technical manufacturing characteristics,
control and safety components:
Steel sealed circuit, externally treated with epoxy paint.•
Sealed combustion chamber suited for type C installation.•
Metal mesh radiant burner equipped with ignition electrodes and flame detection •
managed by an electronic flame control box.
Titanium stainless steel shall-and-tube heat exchanger, with external insulation.•
Tube coil heat recovery [AISI 304L] (for acid condensate).•
Control and safety components
S61 electronic board with integrated microprocessor, LCD display and control •
knob, complete with Mod10 auxiliary card to control thermal capacity and prima-
ry pump modulation (see Figures 6.1 Electronic board S61 → 46 and 6.2 Mod10
controller → 47).
Primary circuit water flowmeter (hot side).•
Plant water flowmeter (cold side).•
Sealed circuit high temperature limit thermostat, with manual reset.•
Flue temperature thermostat 120 °C, with manual reset.•
Sealed circuit safety relief valve.•
Safety by-pass valve, between high and low pressure parts of the sealed circuit.•
Antifreeze functions for hydraulic circuit.•
Ionization flame control box.•
Double shutter electric gas valve.•
Condensate discharge sensor.•