Robur GAHP-GS User manual

Installation, Use and Maintenance
Manual
GAHP GS/WS
powered by gas and renewable energies
water/water gas absorption heat pump

Revision: U
Code: D-LBR509
This Installation, use and maintenance manual has been drawn up and printed by Robur S.p.A.; whole or partial reproduction of this
Installation, use and maintenance manual is prohibited.
Any use of this Installation, use and maintenance manual other than for personal consultation must be previously authorised by Robur S.p.A.
The original is led at Robur S.p.A.
The rights of those who have legitimately led the registered trademarks contained within this publication are not aected.
With the aim of continuously improving the quality of its products, Robur S.p.A. reserves the right to modify the data and contents of this
Installation, use and maintenance manual without prior notice.

Installation, use and maintenance manual – GAHP GS/WS 3
INDEX OF CONTENTS
I Introduction................................................ p.4
Recipients ......................................................................... p.4
Control device................................................................. p.4
II Symbols and denitions ............................ p.4
II.1 Key to symbols................................................................ p.4
II.2 Terms and denitions................................................... p.4
III Warnings ..................................................... p.4
III.1 General and safety warnings..................................... p.4
III.2 Conformity ....................................................................... p.6
III.3 Exclusions of liability and warranty......................... p.6
1 Features and technical data....................... p.7
1.1 Features............................................................................. p.7
1.2 Dimensions ...................................................................... p.8
1.3 Components.................................................................. p.10
1.4 Electrical wiring diagram .......................................... p.13
1.5 Electronic boards ......................................................... p.14
1.6 Operation mode........................................................... p.16
1.7 Controls ........................................................................... p.16
1.8 Technical characteristics............................................ p.16
2 Transport and positioning....................... p.18
2.1 Warnings......................................................................... p.18
2.2 Handling.......................................................................... p.18
2.3 Appliance position (outdoor version) .................. p.19
2.4 Installation premises (indoor variant)................... p.19
2.5 Minimum clearance distances................................. p.19
2.6 Mounting base.............................................................. p.19
3 Heating engineer...................................... p.20
3.1 Warnings......................................................................... p.20
3.2 Installation...................................................................... p.20
3.3 Hydraulic connections ............................................... p.20
3.4 Water circulation pumps........................................... p.21
3.5 Anti-icing function....................................................... p.22
3.6 Anti-icing liquid............................................................ p.22
3.7 System water quality .................................................. p.22
3.8 Installation lling ......................................................... p.23
3.9 Fuel gas supply ............................................................. p.23
3.10 Combustion products exhaust ............................... p.24
3.11 Flue gas condensate discharge............................... p.29
3.12 Safety valve exhaust (indoor version)................... p.30
4 Electrical installer..................................... p.30
4.1 Warnings......................................................................... p.30
4.2 Electrical systems......................................................... p.31
4.3 Electrical power supply.............................................. p.31
4.4 Set-up and control....................................................... p.32
4.5 Water circulation pumps........................................... p.34
5 First start-up ............................................. p.37
5.1 Preliminary checks....................................................... p.37
6 Normal operation ..................................... p.37
6.1 Warnings......................................................................... p.37
6.2 Switch on and o......................................................... p.37
6.3 Messages on the display ........................................... p.38
6.4 Electronic adjustment on the machine – Menus
and parameters of the S61 board.......................... p.38
6.5 Modifying settings....................................................... p.39
6.6 Restarting a locked-down unit - Reset................. p.39
6.7 Eciency......................................................................... p.40
7 Maintenance ............................................. p.40
7.1 Warnings......................................................................... p.40
7.2 Pre-emptive maintenance........................................ p.40
7.3 Scheduled routine maintenance............................ p.41
7.4 Periods of inactivity..................................................... p.41
8 Diagnostics................................................ p.41
Appendices ............................................... p.44
Product che.................................................................. p.44

Introduction
4
I
I INTRODUCTION
Manual
This Manual is an integral part of the GAHP GS/WS units
and must be handed to the end user together with the
appliance.
RECIPIENTS
This Manual is intended for:
▶ end user, for appropriate and safe use of the appliance;
▶ qualied installer, for correct appliance installation;
▶ planner, for specic information on the appliance.
CONTROL DEVICE
In order to be able to work, the GAHP GS/WS unit needs a con-
trol device (DDC, CCP/CCI or external requests), which must be
connected by the installer.
II SYMBOLS AND DEFINITIONS
II.1 KEY TO SYMBOLS
DANGER
WARNING
NOTE
PROCEDURE
REFERENCE (to other document)
II.2 TERMS AND DEFINITIONS
GAHP Appliance/Unit = equivalent terms, both used to des-
ignate the gas powered absorption heat pump GAHP (Gas Ab-
sorption Heat Pump).
TAC = Technical Assistance Centre authorised by Robur.
External request = generic control device (e.g. thermostat,
clock or any other system) equipped with a voltage-free NO con-
tact and used as control to start/stop the GAHP unit.
CCI Controller (Comfort Controller Interface) = optional Robur
control device which lets you manage up to three modulating
heat only GAHP units (A, WS, GS).
CCP Controller (Comfort Control Panel) = Robur control de-
vice which lets you manage in modulation mode up to three
GAHP units and all system components (probes, diverter/mixing
valves, circulating pumps), including any integration boiler.
DDC Control (Direct Digital Controller) = optional Robur device
to control one or more Robur appliances (GAHP heat pumps, GA
chillers and AY boilers) in ON/OFF mode.
RB100/RB200 Devices (Robur Box) = optional interface devices
complementary to DDC, which may be used to broaden its func-
tions (heating/cooling/DHW production service demands, and
control of system components such as third party generators,
adjustment valves, circulators, probes).
Heat generator = equipment (e.g. boiler, heat pump, etc..) pro-
ducing heating and/or DHW.
GUE (Gas Utilization Eciency) = eciency index of gas heat
pumps, equal to the ratio between the thermal energy pro-
duced and the energy of the fuel used (relative to LCV, lower
caloric value).
First Switch-On = appliance commissioning operation which
may only and exclusively be carried out by a TAC.
S61/Mod10/W10 Boards = electronic boards on the GAHP unit,
to control all functions and to provide interface with other devic-
es and with the user.
III WARNINGS
III.1 GENERAL AND SAFETY WARNINGS
Installer's qualications
Installation must exclusively be performed by a Qualied
Firm and by Skilled Personnel, with specic knowledge
on heating, cooling, electrical systems and gas applianc-
es, in compliance with the laws in force in the Country of
installation.
Declaration of Conformity
Upon completing installation, the installing rm shall
issue to the owner/client the appliance's Workmanlike
Conformity Declaration, according to national/local reg-
ulations in force and the manufacturer's instructions/
provisions.
Misuse
The appliance must only be used for the purposes for
which it has been designed. Any other use is deemed
hazardous. Incorrect use may aect operation, duration
and safety of the appliance. Adhere to the manufactur-
er's instructions.
Hazardous situations
Do not start the appliance in hazardous conditions,
such as: gas smell, problems with the plumbing/elec-
trical/gas system, parts of the appliance under water
or damaged, malfunctioning, disabling or bypassing
control and safety devices.
In case of danger, request intervention by skilled per-
sonnel.
In case of danger, switch o the electrical power and
gas supplies only if this can be done in total safety.

Warnings
Installation, use and maintenance manual – GAHP GS/WS 5
III
Do not entrust children, persons with physical, senso-
ry or mental disabilities or persons with poor knowl-
edge and experience with use of the appliance.
Gas component tightness
Before performing any operation on gas ducting
components, close the gas cock.
Upon completing any procedure, perform the tight-
ness test according to regulations in force.
Gas smell
If you smell gas:
Do not use electrical devices such as telephones, mul-
timeters or other equipment that may cause sparks
next to the appliance.
Shut o the gas supply by turning the cock o.
Disconnect electrical power supply by means of the
external isolation switch in the power supply electri-
cal panel.
Use a telephone away from the appliance to ask for
intervention from skilled personnel.
Poisoning
Ensure the ue gas ducts are tightness and compliant
with the regulations in force.
Upon completing any procedure, ensure compo-
nents are tightness.
Moving parts
The appliance contains moving parts.
Do not remove guards during operation, and in any
case prior to disconnecting the power supply.
Burn hazard
The appliance contains very hot parts.
Do not open the appliance and do not touch internal
components before the appliance has cooled down.
Do not touch the ue gas exhaust before it has cooled
down.
Pressure vessels
The appliance has a sealed circuit classied as pres-
sure vessel, the tightness of which is tested by the
manufacturer.
Do not carry out any intervention on the sealed cir-
cuit or on the appliance's valves.
Water-ammonia solution
The GAHP unit uses the ammonia-water absorption
cycle. The water-ammonia solution is contained in the
sealed circuit. The solution is harmful for health if it is in-
gested, or comes in contact with the skin.
In the event of coolant leak keep away and discon-
nect the power and gas supply (only if it is possible to
do so with no danger).
Request assistance from the TAC.
Electrocution hazard
Disconnect the electrical power supply before any
work/procedure on appliance components..
For electrical connections exclusively use compliant
components and according to the specications pro-
vided by the manufacturer.
Ensure the appliance cannot be accidentally switched
back on.
Earthing
Electrical safety depends on eective earthing system,
correctly connected to the appliance and installed ac-
cording to the regulations in force.
Distance from combustible or ammable materials
Do not store ammable materials (paper, solvents,
paint, etc.) in the vicinity of the appliance.
Limescale and corrosion
Depending on the chemical/physical properties of the
system water, limescale or corrosion may damage the
appliance (Paragraph 3.7 p.22 ).
Check system tightness.
Avoid frequent top-ups.
Chloride concentration
The concentration of chlorides or free chlorine in the
system water must not exceed the values in Table
3.2 p.22 .
Aggressive substances in air
Halogenated hydrocarbons containing chlorine and u-
orine compounds cause corrosion.The air of the installa-
tion site must be free from aggressive substances.
Acid ue gas condensate
Discharge the acid condensate of combustion ue
gas, as indicated in Paragraph 3.11 p.29 , in compli-
ance with current exhaust regulations.
Switching the appliance o
Disconnecting the power supply while the appliance
is running may cause permanent damage to internal
components.
Except in the case of danger, do not disconnect the
power supply to switch o the appliance, but always
and exclusively act through the control device pro-
vided (DDC, CCP/CCI or external request).
In the event of failure
Operations on internal components and repairs may
exclusively be carried out by a TAC, only using original
parts.
In the event of failure of the appliance and/or break-
age of any component, do not attempt to repair and/
or restore and immediately contact the TAC.
Routine maintenance
Proper maintenance assures the eciency and good op-
eration of the appliance over time.
Maintenance must be performed according to the

Warnings
6
III
manufacturer's instructions (see Chapter 7  p. 40 )
and in compliance with current regulations.
Appliance maintenance and repairs may only be en-
trusted to rms legally authorised to work on gas ap-
pliances and systems.
Enter into a maintenance contract with an authorised
specialised rm for routine maintenance and for ser-
vicing in case of need.
Only use original parts.
Decommissioning and disposal
If the appliance is to be disposed of, contact the manu-
facturer for its disposal.
Keep the Manual
This "Installation, Use and Maintenance Manual" must al-
ways accompany the appliance and must be handed to
the new owner or installer in the event of sale or removal.
III.2 CONFORMITY
EU Directives and standards
The absorption heat pumps of the GAHP series are certied as
conforming to standard EN 12309-1 and -2 and comply with the
essential requirements of the following Directives:
▶ 2009/142/EC "Gas Appliances Directive" as amended and
added.
▶ 2014/30/EC "Electromagnetic Compatibility Directive" as
amended and added.
▶ 2014/35/EC "LowVoltage Directive" as amended and added.
▶ 2006/42/EC "Machine Directive" as amended and added.
▶ 2014/68/EU "Pressure Equipment Directive" as amended
and added.
Furthermore, they comply with the requirements of the follow-
ing standards:
▶ UNI EN 677 Specic requirements for condensing boilers
with nominal heating capacity up to 70 kW.
▶ EN 378 Refrigerating systems and heat pumps.
Other applicable provisions and standards
The design, installation, operation and maintenance of the sys-
tems shall be carried out in compliance with current applicable
regulations, depending on the Country and location, and in ac-
cordance with the manufacturer's instructions. In particular, reg-
ulations regarding the following shall be complied with:
▶ Gas systems and equipment.
▶ Electrical systems and equipment.
▶ Heating and air conditioning systems, and heat pumps.
▶ Environmental protection and combustion products ex-
haust.
▶ Fire safety and prevention.
▶ Any other applicable law, standard and regulation.
III.3 EXCLUSIONS OF LIABILITY AND
WARRANTY
Any contractual or extra-contractual liability of the man-
ufacturer for any damage caused by incorrect installa-
tion and/or improper use and/or failure to comply with
regulations and with the manufacturer's directions/in-
structions shall be disclaimed.
In particular, the warranty on the appliance may be ren-
dered void by the following conditions:
Incorrect installation.
Misuse.
Failure to comply with the manufacturer's indications
on installation, use and maintenance.
Alteration or modication of the product or any part
thereof.
Extreme operational conditions or however outside
of the operational ranges set forth by the manufac-
turer.
Damages caused by external agents such as salts,
chlorine, sulphur or other chemical substances con-
tained in the installation water or present in the air of
the installation site.
Abnormal actions transmitted to the appliance by the
plant or installation (mechanical stresses, pressure,
vibrations, thermal expansion, electrical surges...).
Accidental damages or due to force majeure.

Features and technical data
Installation, use and maintenance manual – GAHP GS/WS 7
1
1 FEATURES AND TECHNICAL DATA
1.1 FEATURES
Operation
Based on the thermodynamic water-ammonia absorption cy-
cle (H20–NH3), the appliance simultaneously produces hot wa-
ter and chilled water, using the ground or well/ground/surface
water as a renewable energy source and natural gas (or LPG) 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 (type C);
▶ metal mesh radiant burner equipped with ignition and ame
detection device, controlled by an electronic control unit;
▶ titanium stainless steel shell-and-tube water exchanger
(condenser), externally insulated;
▶ titanium stainless steel shell-and-tube water exchanger
(evaporator), externally insulated;
▶ stainless steel, shell and tube recovery exchanger of ue gas
latent heat.
Control and safety devices
▶ S61 electronic board with microprocessor, LCD display and
knob;
▶ Mod10 additional electronic board (integrated in S61);
▶ auxiliary W10 electronic board
▶ installation water ow meter (hot side);
▶ installation water ow switch (cold side);
▶ generator limit thermostat, with manual reset;
▶ ue gas temperature thermostat, with manual reset;
▶ generator n temperature sensor;
▶ sealed circuit safety relief valve;
▶ by-pass valve, between high and low pressure circuits;
▶ ionisation ame controller;
▶ gas solenoid valve with double shutter;
▶ condensate discharge obstruction sensor.
Indoor or outdoor versions
The GS and WS units are available in two variants, indoor or out-
door, according to the installation site.

Features and technical data
8
1
1.2 DIMENSIONS
Figure1.1Indoor GAHP GS/WS dimensions
A Flue gas output Ø 80
B Combustion air inlet Ø 80
C Fumes thermostat manual reset
D Power supply cables input
E Ventilation fan
F Burner on warning light
G Gas connection Ø 3/4"
H Hot water inlet Ø 1"¼
L Renewable source water return Ø 1"¼
M Renewable source water delivery Ø 1"¼
N Hot water delivery Ø 1"¼
Q Safety valve outlet ducting Ø 1"¼

Features and technical data
Installation, use and maintenance manual – GAHP GS/WS 9
1
Figure1.2Outdoor GAHP GS/WS dimensional drawing
A Flue gas output Ø 80
B Combustion air inlet Ø 80
C Fumes thermostat manual reset
D Power supply cables input
E Ventilation fan
F Appliance operation warning light
G Gas connection Ø 3/4"
H Hot water inlet Ø 1"¼
L Renewable source water return Ø 1"¼
M Renewable source water delivery Ø 1"¼
N Hot water delivery Ø 1"¼
P Condensate drain

Features and technical data
10
1
1.3 COMPONENTS
Figure1.3Internal components - front view
1 Ventilation fan
2 Gas valve
3 Combustion blower
4 Tmix air-gas mixture temperature probe
5 Electrical panel
6 Oil pump
7 Flow meter (hot side)









Features and technical data
Installation, use and maintenance manual – GAHP GS/WS 11
1
Figure1.4Internal components - left side view
1 Manual air vent (cold side)
2 Flow switch (cold side)
3 Manual reset of the ue exhaust thermostat
4 Ø 80 ue gas exhaust
5 Sensing element of the ue exhaust thermostat
6 Generator n temperature sensor
7 Condensate drain sensor
8 Flame sensing / ignition electrodes
9 Condensate drain siphon
10 Manual air vent valve (hot side)
1
3
4
2
5
6
7
8
9
10

Features and technical data
12
1
Figure1.5Internal components - right side view
1 Safety valve
2 TG generator temperature probe
3 Limit thermostat
4 Ignition transformer
5 Flow temperature probe (hot side)







Features and technical data
Installation, use and maintenance manual – GAHP GS/WS 13
1
1.4 ELECTRICAL WIRING DIAGRAM
Figure1.6Appliance wiring diagram
SCH1 Controller S61
SCH2 W10 circuit board
SCH3 Mod10 circuit board
TER Appliance power terminal block
CNTBOX Flame controller
PWRTR Board transformer
BLW Blower
PMP Oil pump
IGNTR Ignition transformer
IGN Ignition electrodes
FLS Flame sensor
LS Gas valve ON indicator lamp
GV Gas solenoid valve
THMF Cold water delivery temperature sensor
THRF Cold water return temperature sensor
TMIX Combustion air temperature sensor
TA Ambient air temperature sensor
TG Generator temperature sensor
THMC Hot water ow temperature probe
THRC Hot water return temperature probe
REED Oil pump rotation sensor
TF Fumes temperature sensor or generator n sensor
TC Manual ue gas thermostat
TL Generator limit thermostat
FM Hot side owmeter
FL Renewable source water ow switch
CWS Condensate water sensor
MA Terminal block

Features and technical data
14
1
1.5 ELECTRONIC BOARDS
Electronic boards (S61+Mod10)
The unit's electrical board contains:
▶ Electronic Board S61 (Figure 1.7  p. 14 ), with micropro-
cessor, it controls the appliance and displays data, messag-
es and operative codes. The appliance is monitored and
programmed by interacting with the display and knob.
▶ Auxiliary Mod10 Electronic Board (Figure 1.8  p. 15 ),
overlapping S61, controls power modulation of the burner
and water circulation pump rate variation.
▶ Satellite W10 Electronic Board (Figure 1.9  p. 15 ), in-
terconnected to the S61 board and located next to it, used
mainly to control hot side circulating pump.
Figure1.7Electronic board S61
SCH1 Controller S61
SCH3 Mod10 electronic board (see
specic gure for further details)
A1, A2 Auxiliary inputs
ENC Knob
F1 T 2A fuse
F2 Fuse F 10A
F3 T 2A fuse
F4 T 3,15A fuse
FAN (BK, WH, BR) Cooling fan output
FL Flow switch input
FS5 (24V AC) Board power supply 24-0-24Vac
IGN.BOX (L, N) Flame controller power supply
230 Vac
J1 CAN BUS Jumper
J10 Jumper N.O. contact
J82 W10 board connector (on
Mod10)
JP10 6-pole ame controller
connector
JP12 Flue gas probe or generator n
probe input
JTAG S61 board programming
connector
MAIN 230V (L,N) S61 Board power supply 230Vac
N.O. CONTACT Normally open pump contact
P7 (R, W,Y, O) Enable input
P8 (GND, L, H) CAN BUS connector
PUMP 230V (L, N) Oil pump power supply output
SPI Communication port with
Mod10 controller
SRT1 Oil pump rotation sensor input
SRT2 Hot water owmeter input
TA Ambient air temperature probe
input
TA1 Hot water ow temperature
probe input
TA2 Hot water inlet temperature
probe input
TCN Combustion air temperature
probe input
TF Flue gas thermostat input
TG Generator temperature probe
input
THMF Cold water inlet temperature
probe input
THRF Cold water inlet temperature
probe input
TL Generator limit thermostat input

Features and technical data
Installation, use and maintenance manual – GAHP GS/WS 15
1
Figure1.8Mod10 controller
HFLOW Not used
CFLOW Condensation water
sensor control
J51 SPI connector
HPMP Primary circuit hot water
pump control output (0-10
V) [A/GS/WS]
CPMP Cold side water pump
control output [GS/WS]
NC1-C1 Status indication of locking
warnig/error
CN5 Blower control
J82 W10 auxiliary controller
connector
J83 W10 cable shielding
connection
CN1 Inputs 0-10V (not used)
Figure1.9W10 electronic controller
JP1 Communication with S61/
Mod10

Features and technical data
16
1
1.6 OPERATION MODE
ON/OFF or modulating operation
The GAHP unit may work in two modes:
▶ mode (1) ON/OFF, i.e. On (at full power) or O, with circulat-
ing pumps at constant ow;
▶ mode (2) MODULATING, i.e. at variable load from 50% to
100% of power, with circulating pumps at variable ow (hot
side) and constant ow (cold side).
For each mode, (1) o (2), specic control systems and devices are
provided (Paragraph 1.5 p.14 ).
1.7 CONTROLS
Control device
The appliance may only work if it is connected to a control de-
vice, selected from:
▶ (1) DDC control
▶ (2) CCP/CCI control
▶ (3) external request
1.7.1 Adjustment system (1) with DDC (GAHP unit
ON/OFF)
The DDC controller is able to control appliances, a single GAHP
unit, or even several Robur GAHP/GA/AY units in cascade, only
in ON/OFF mode (non modulating). For more details refer to the
DDC, RB100, RB200 Manuals and the Design Manual.
DDC Controller
The main functions are:
▶ setup and control of one (or more) Robur units of the ab-
sorption line (GAHP, GA, AY);
▶ parameter gures display and setting;
▶ hourly programming;
▶ climate curve control;
▶ diagnostics;
▶ reset errors;
▶ possibility to interface with a BMS;
DDC functionality may be extended with auxiliary Robur devices
RB100 and RB200 (e.g. service requests, DHW production, Third
Party generator control, probe control, system valves or circulat-
ing pumps, ...).
1.7.2 Adjustment system (2) with CCP/CCI
(modulating GAHP unit)
The CCP/CCI control is able to control in heating only (and pos-
sibly passive cooling) up to 3 GAHP units in modulating mode
(therefore A/WS/GS only, excluding AR/ACF/AY), plus any inte-
gration ON/OFF boiler. For additional details and diagrams refer
to the CCP/CCI Manual and the Planning Manual.
CCP/CCI Control
See CCP/CCI device Booklet.
1.7.3 Adjustment system (3) with external request
(GAHP unit ON/OFF)
The appliance may also be controlled via generic request de-
vices (e.g. thermostat, timer, button, contactor...) tted with
voltage-free NO contact. This system only provides elementary
control (on/o, with xed set-point temperature), hence without
the important functions of systems (1) and (2). It is advisable to
possibly limit its use to simple applications only and with a sin-
gle appliance.There are two control options: heating request or
cooling request.
For connection of the selected device to the appliance's
electronic board please refer to Paragraph 4.4 p.32 .
1.8 TECHNICAL CHARACTERISTICS
Table1.1GAHP GS/WS technical data
GAHP GS HT GAHP WS
Heating mode
Seasonal space heating energy eciency
class (ErP) medium-temperature application (55 °C) A++
low-temperature application (35 °C) A+
Unitary heating power Evaporator inlet temperature/Delivery
temperature
B0W35 kW 41,6
B0W50 kW 37,6
B0W65 kW 31,4
W10W35 kW 43,9
W10W50 kW 41,6
W10W65 kW 35,8
GUE eciency Evaporator inlet temperature/Delivery
temperature
B0W35 % 165
B0W50 % 149
B0W65 % 125
W10W35 % 174
W10W50 % 165
W10W65 % 142
Heating capacity nominal (1013 mbar - 15 °C) kW 25,7
true peak kW 25,2
(1) In transient operation, lower temperatures are allowed.
(2) For ows other than nominal see Design Manual, Pressure losses Paragraph.
(3) ±10% depending on power voltage and absorption tolerance of electric motors.
(4) PCI (G20) 34,02 MJ/m³ (15 °C - 1013 mbar).
(5) PCI (G30/G31) 46,34 MJ/kg (15 °C - 1013 mbar).
(6) Sound power values detected in compliance with the intensity measurement methodology set forth by standard EN ISO 9614; C13 type installation.
(7) Maximum sound pressure levels in free eld, with directionality factor 2, obtained from the sound power level in compliance with standard EN ISO 9614; C13 type
installation.
(8) Indoor variant only.
(9) Overall dimensions excluding fumes pipes.

Features and technical data
Installation, use and maintenance manual – GAHP GS/WS 17
1
GAHP GS HT GAHP WS
Hot water delivery temperature maximum for heating °C 65
maximum for DHW °C 70
Hot water inlet temperature
maximum for heating °C 55
maximum for DHW °C 60
minimum temperature in continuous operation °C 30 (1)
Thermal dierential nominal °C 10
Heating water ow
nominal l/h 3170 3570
maximum l/h 4000
minimum l/h 1400
Pressure drop heating mode for nominal water ow (B0W50) bar 0,49 (2)
for nominal water ow rate(W10W50) bar 0.57 (2)
Ambient air temperature (dry bulb) maximum °C 45
minimum °C 0
Renewable source operating conditions
Power recovered from renewable source Evaporator inlet temperature/Delivery
temperature
B0W35 kW 16,4
B0W50 kW 12,1
B0W65 kW 7.0
W10W35 kW 18,7
W10W50 kW 16,6
W10W65 kW 10.6
Renewable source water return
temperature maximum °C 45
Renewable source delivery water
temperature minimum °C -5 3
Renewable source water ow rate (with
25% glycol)
nominal (B0W50) l/h 3020
maximum l/h 4000
minimum l/h 2000
Renewable source water ow rate
nominal (W10W50) l/h 2850
maximum l/h 4700
minimum l/h 2300
Renewable source pressure drop at nominal water ow bar 0,51 (2) 0,38 (2)
Electrical specications
Power supply
voltage V 230
type SINGLE PHASE
frequency 50 Hz supply 50
Electrical power absorption nominal kW 0,41 (3)
Degree of protection IP X5D
Installation data
Gas consumption
methane G20 (nominal) m³/h 2,72 (4)
methane G20 (min) m³/h 1,34
G25 (nominal) m³/h 3,16
G25 (min) m³/h 1,57
G30 (nominal) kg/h 2,03 (5)
G30 (min) kg/h 0,99
G31 (nominal) kg/h 2,00 (5)
G31 (min) kg/h 0,98
NOxemission class 5
NOxemission ppm 25.0
CO emission ppm 36,0
Sound power Lw(max) dB(A) 66,1 (6)
Sound pressure Lpat 5 metres (max) dB(A) 44,1 (7)
Minimum storage temperature °C -30
Maximum water pressure in operation bar 4
Maximum ow ue condensate l/h 4,0
Water content inside the apparatus hot side l 4
cold side l 3
Water tting type F
thread “ G 1 1/4
(1) In transient operation, lower temperatures are allowed.
(2) For ows other than nominal see Design Manual, Pressure losses Paragraph.
(3) ±10% depending on power voltage and absorption tolerance of electric motors.
(4) PCI (G20) 34,02 MJ/m³ (15 °C - 1013 mbar).
(5) PCI (G30/G31) 46,34 MJ/kg (15 °C - 1013 mbar).
(6) Sound power values detected in compliance with the intensity measurement methodology set forth by standard EN ISO 9614; C13 type installation.
(7) Maximum sound pressure levels in free eld, with directionality factor 2, obtained from the sound power level in compliance with standard EN ISO 9614; C13 type
installation.
(8) Indoor variant only.
(9) Overall dimensions excluding fumes pipes.

Transport and positioning
18
2
GAHP GS HT GAHP WS
Gas connection type F
thread “ G 3/4
Safety valve outlet channel tting “ G 1 1/4 (8)
Fume outlet
diameter (Ø) mm 80
residual head Pa 80
product conguration C63
Type of installation C13, C33, C43, C53, C63, C83, B23P, B33
Dimensions
width mm 848 (9)
depth mm 690
height mm 1278
Weight in operation kg 300
General information
Cooling uid ammonia R717 kg 7.0 7,7
water H2O kg 10,0
Maximum pressure of the cooling circuit bar 32
(1) In transient operation, lower temperatures are allowed.
(2) For ows other than nominal see Design Manual, Pressure losses Paragraph.
(3) ±10% depending on power voltage and absorption tolerance of electric motors.
(4) PCI (G20) 34,02 MJ/m³ (15 °C - 1013 mbar).
(5) PCI (G30/G31) 46,34 MJ/kg (15 °C - 1013 mbar).
(6) Sound power values detected in compliance with the intensity measurement methodology set forth by standard EN ISO 9614; C13 type installation.
(7) Maximum sound pressure levels in free eld, with directionality factor 2, obtained from the sound power level in compliance with standard EN ISO 9614; C13 type
installation.
(8) Indoor variant only.
(9) Overall dimensions excluding fumes pipes.
Table1.2PED data
GAHP GS HT GAHP WS
PED data
Components under pression
generator l 18,6
leveling chamber l 11,5
evaporator l 3,7
cooling volume transformer l 4,5
absorber/condenser l 3,7
cooling absorber solution l 6,3
solution pump l 3,3
Test pressure (in air) bar g 55
Maximum pressure of the cooling circuit bar g 32
Filling ratio kg of NH3/l 0,136 0,149
Fluid group group 1°
2 TRANSPORT AND POSITIONING
2.1 WARNINGS
Damage from transport or installation
The manufacturer shall not be liable for any damage dur-
ing appliance transport and installation.
On-site inspection
Upon arrival at the site, ensure there is no transport
damage on packing, metal panels.
After removing the packing materials, ensure the ap-
pliance is intact and complete.
Packing
Only remove the packing after placing the appliance
on site.
Do not leave parts of the packing within the reach
of children (plastic, polystyrene, nails...) since they are
potentially dangerous.
Weight
The crane and lifting equipment must be suitable for
the load.
Do not stand under suspended loads.
2.2 HANDLING
Handling and lifting
▶ Always handle the appliance in its packing, as delivered by
the factory.
▶ To lift the appliance use straps or slings inserted in the holes
of the base (Figure 2.1 p.19 ).
▶ Use lifting beams to avoid damaging the outer panels and
nned coil (Figure 2.1 p.19 ).
▶ Comply with safety regulations at the installation site.

Transport and positioning
Installation, use and maintenance manual – GAHP GS/WS 19
2
Figure2.1Instruction for lifting
In the event of handling with forklift or pallet truck,
comply with the handling instructions shown on the
packing.
2.3 APPLIANCE POSITION OUTDOOR
VERSION
Do not install the outdoor version inside a room, not
even if it has openings. In no event the outdoor version
may be started inside a room.
Where to install the appliance
In the outdoor version the appliance:
▶ May be only installed outside buildings, out of the dripping
line of rain gutters or the like. It does not require protection
from weathering.
▶ The appliance may be installed at ground level, on a terrace
or on a roof, compatibly with its dimensions and weight.
▶ The appliance's ue gas exhaust must not be immediately
close to openings or air intakes of buildings, and must com-
ply with environmental regulations.
▶ Do not install near the exhaust of ues, chimneys or hot
polluted air. In order to work correctly, the appliance needs
clean air.
Acoustic issues
▶ Pre-emptively assess the appliance's sound eect in connec-
tion to the site, taking into account that building corners, en-
closed courtyards, restricted spaces may amplify the acous-
tic impact due to the reverberation phenomenon.
2.4 INSTALLATION PREMISES INDOOR
VARIANT
The installation premises must meet all the requirements set
forth bylaws,standards and regulationsof the Country and place
of installation regarding gas appliances and cooling appliances
Do not install in a room that has no aeration openings.
Features of the installation premises
▶ The premises must be provided with permanent and su-
ciently wide ventilation openings to permit even air ow for
aeration and possibly for combustion (if type B installation).
▶ Combustion air intake may be ducted from the outside (type
C installation).
▶ The ue gas exhaust must be ducted to the outside.The ue
opening must not be immediately close to openings or air
intakes of buildings, and must comply with environmental
regulations.
2.5 MINIMUM CLEARANCE DISTANCES
For both the indoor and outdoor version:
Distances from combustible or ammable materials
▶ Keep the appliance away from combustible or ammable
materials or components, in compliance with applicable
regulations.
Clearances around the appliance
The minimum clearance distances shown in Figure 2.2 p.19
(bar any stricter regulations) are required for safety, operation
and maintenance.
Figure2.2Clearances
2.6 MOUNTING BASE
Base or oor construction features
▶ Place the appliance on a levelled at surface made of re-
proof material and able to withstand its weight.
For the outdoor version:
(1) - installation at ground level
▶ Failing a horizontal supporting base, make a at and levelled
concrete base, at least 100-150 mm larger than the appli-
ance dimensions per side.
(2) - installation on terrace or roof
▶ The structure of the building must support the total weight
of the appliance and the supporting base.
▶ If necessary, provide a maintenance walkway around the
appliance.
Anti vibration mountings
Although the appliance's vibrations are minimal, resonance
phenomena might occur in roof or terrace installations.
▶ Use anti-vibration mountings.
▶ Also provide anti-vibration connections between the appli-
ance and water and gas pipes.

Heating engineer
20
3
3 HEATING ENGINEER
3.1 WARNINGS
General warnings
Read the warnings in Chapter III p.4 , providing im-
portant information on regulations and on safety.
Compliance with installation standards
Installation must comply with applicable regulations in
force, based on the installation Country and site, in mat-
ters of safety, design, implementation and maintenance
of:
heating systems;
cooling systems;
gas systems;
ue gas exhaust;
ue gas condensate discharge.
Installation must also comply with the manufacturer's
provisions.
3.2 INSTALLATION
Primary or secondary circuit
▶ In many cases it is advisable to divide the water installation
(hot side) into two parts, primary and secondary circuit, un-
coupled by a hydraulic separator, or possibly by a tank that
also acts as inertial volume/thermal inertia.
Constant ot variable water ow
The GAHP unit is able to operate with constant water ow rate
(always on the cold side) or variable (on hot side only), according
to ON/OFF or modulating operative mode.
System and components must be designed and installed
consistently.
Minimum water content
High thermal inertia is conducive to ecient appliance opera-
tion. Very short ON/OFF cycles are to be avoided.
▶ If necessary, provide for an inertial volume (on hot side), to
be suitably sized (see planning manual).
Heating and/or cooling
It may be required to alternatively or simultaneously produce
hot water and/or chilled water. The selection of the type of op-
eration may be performed by the control device, by suitably se-
lecting the priority (cooling or heating).
3.3 HYDRAULIC CONNECTIONS
Plumbing ttings
on the rear panel (Figures 1.1 p.8 and 1.2 p.9 ).
▶ N(= out) 1"1/4 F -WATER OUTPUT (hot) (m = ow to the in-
stallation);
▶ H(= in) 1"1/4 F- WATER INPUT (hot) (r = inlet from the in-
stallation).
▶ M(= out) 1"1/4 F - WATER OUTPUT (cold) (m = ow to the
installation);
▶ L(= in) 1"1/4 F - WATER INPUT (cold) (r = inlet from the in-
stallation).
Hydraulic pipes, materials and features
▶ Use pipes for heating/cooling installations, protected from
weathering, insulated for thermal losses, with vapour barrier
to prevent condensation.
Pipe cleaning
Before connecting the appliance, accurately clean
the water and gas piping and any other system com-
ponent, removing any residue.
Minimum components of primary water circuits
Always provide, near the appliance, both on the hot side and
cold side:
on water piping, both output and input (m/r)
▶ 2 ANTIVIBRATION JOINTS on water ttings;
▶ 2 PRESSURE GAUGES;
▶ 2 ISOLATION BALL VALVES;
on the input water piping (r)
▶ 1 SEPARATOR FILTER;
▶ 1 FLOW ADJUSTMENT VALVE, if the circulating pump is con-
stant ow;
▶ 1 WATER CIRCULATION PUMP, towards the appliance;
on the output water piping (m) (hot side only)
▶ 1 SAFETY VALVE (3 bar);
▶ 1 EXPANSION TANK of the individual unit.
For GAHP GS/WS with open circuit the EXCHANGER is
obligatory.