Features and technical data
Installation, use and maintenance manual – K18 Hybrigas
7
1
1
FEATURES AND TECHNICAL DATA
The K18 Hybrigas is composed by a K18 heat pump module and
by a condensing boiler module.
1.1
FEATURES
1.1.1
Available range
A distinction must be made from the application perspective
based on the type of service provided:
A. Systems for space heating only;
B. Systems for space heating and DHW production (Domestic
Hot Water).
Systems for space heating and DHW production correspond to
the EVO version.
All K18 Hybrigas appliances are available both in the outdoor
installation version and in the indoor installation version.
Figure 1.1
Available range for the family of K18 systems
HEATING ONLY
H DWH
GAS ABSORPTION
HEAT PUMP
INDOOR / OUTDOOR
K18 HYBRIGAS
K18 HYBRIGAS EVO
K18
18 kW
K18
18 kW
+ CONDENSING
BOILER
Table 1.1
Selection guide
Heating only
H DHW
K18 Hybrigas
- aerothermal gas heat pump + condensing boiler
- built-in digital system, optimises the use of renewable energy; depending on
outdoor temperature, it regulates the operation in the most cost-effective and
ecological way possible
- monobloc, makes installation easier and reduces costs
- high peak thermal power with wide modulation
- heating capacity (burned) 29,2 kW
- delivered thermal power 37,9 kW
- indoor or outdoor versions
- use of aerothermal renewable energy for heating hot water production up to 65
°C
K18 Hybrigas EVO
- aerothermal gas heat pump + condensing system cont 300-liter
DHW buffer tank (optional)
- built-in digital system, optimises the use of renewable energy; depending on
outdoor temperature, it regulates the operation in the most cost-effective and
ecological way possible
- use of aerothermal renewable energy for heating hot water production up to 65
°C
- use of aerothermal renewable energy also for buffer tank DHW production up
to 80 °C
- controlling secondary zone circuits (via the system controller)
- high thermal power
- heating capacity (burned) 29,2 kW
- delivered thermal power 37,9 kW
- indoor or outdoor versions
1.1.2
Characteristics of heat pump module
Operation
The K18 Hybrigas heat pump is based on the thermodynamic
water-ammonia absorption cycle (H
2
0–NH
3
), and produces hot
water using outdoor air as a renewable energy source (cold
source) and natural gas as primary energy.
The thermodynamic cycle takes place within a hermetically
sealed circuit, in welded construction, perfectly tight, facto-
ry-tested, which does not require any maintenance or coolant
top-ups.
Mechanical and thermo-hydraulic components
▶
steel sealed circuit, externally treated with epoxy paint;
▶
sealed combustion chamber suitable for outdoor installa-
tions;
▶
burner equipped with ignition and flame detection device,
controlled by an electronic controller;
▶
titanium stainless steel shell-and-tube water exchanger;
▶
stainless steel, flue gas latent heat recovery exchanger;
▶
air exchanger with finned coil, with steel pipe and alumini-
um fins;
▶
automatic microprocessor-controlled finned coil automatic
defrosting valve;
▶
circulation pump.
Control and safety devices
▶
GHP10 electronic board with microprocessor, display and
selection keys;
▶
installation water flowmeter;
▶
generator limit thermostat, with manual reset;
▶
flue gas temperature thermostat, with manual reset;
▶
sealed circuit safety relief valve;
▶
by-pass valve, between high and low pressure circuits;
▶
flame control board
▶
gas solenoid valve with double shutter;
▶
antifreeze function for water circuit;
▶
condensate discharge obstruction sensor.
1.1.3
Characteristics of condensing boiler module
Operation
The K18 Hybrigas Boiler is the condensing boiler module inte-
grating the K18 heat pump and it provides thermal power for
space heating (and DHW in case of K18 Hybrigas EVO) integrat-
ing the heat pump when required.
Mechanical and thermo-hydraulic components
▶
integrated spiral single tube stainless steel heat exchanger;