Robur GAHP-GS Operating instructions

Installation, user and
maintenance manual
GAHP-GS/WS
water/water gas absorption heat pump
powered by gas and renewable energy

Revision: M
Code: D-LBR509
This manual has been drawn up and printed by Robur S.p.A.; whole or partial reproduction of
this manual is prohibited.
The original is filed at Robur S.p.A.
Any use of this manual other than for personal consultation must be previously authorised by
Robur S.p.A.
The rights of those who have legitimately filed the registered trademarks contained within this
publication are not affected.
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 manual without prior notice.

Installation, user and maintenance manual – GAHP-GS/WS
3
Index of Contents
1 PRefACe ������������������������������������������������������������������������������������������������������������4
2 sAfetY WARnInGs������������������������������������������������������������������������������������������5
3 oVeRVIeW And teCHnICAL feAtURes��������������������������������������������������������8
3.1 GENERAL INFORMATION ............................................................................................................................................................ 8
3.2 NOTES ON OPERATION OF THE APPLIANCE......................................................................................................................10
3.3 TECHNICAL MANUFACTURING CHARACTERISTICS.........................................................................................................11
3.4 TECHNICAL DATA ........................................................................................................................................................................12
3.5 DIMENSIONS AND SERVICE PANEL.......................................................................................................................................15
4 noRMAL oPeRAtIon ������������������������������������������������������������������������������������17
4.1 START UP (AND SHUT DOWN)................................................................................................................................................17
4.2 ON-BOARD ELECTRONICS........................................................................................................................................................19
4.3 RESET OPERATIONS....................................................................................................................................................................22
4.4 OPERATING SETTINGS ...............................................................................................................................................................23
4.5 PROLONGED PERIODS OF DISUSE ........................................................................................................................................24
5 HYdRAULIC InstALLAtIon ��������������������������������������������������������������������������26
5.1 GENERAL INSTALLATION PRINCIPLES ..................................................................................................................................26
5.2 POSITION OF THE APPLIANCE ................................................................................................................................................26
5.3 HYDRAULIC CONNECTIONS ....................................................................................................................................................28
5.4 GAS SUPPLY...................................................................................................................................................................................30
5.5 CONDENSATE DISCHARGE.......................................................................................................................................................31
5.6 FILLING OF HYDRAULIC CIRCUIT ...........................................................................................................................................34
5.7 EXHAUST FLUE GAS....................................................................................................................................................................37
5.8 PROGRAMMING OF HYDRAULIC PARAMETERS................................................................................................................42
5.9 SAFETY VALVE DISCHARGE ROUTING..................................................................................................................................43
6 eLeCtRICAL InstALLAtIon��������������������������������������������������������������������������45
6.1 ELECTRICAL DIAGRAM OF THE APPLIANCE.......................................................................................................................49
6.2 HOW TO CONNECT THE APPLIANCE ELECTRICALLY.......................................................................................................50
6.3 TYPE A (COMFORT CONTROL PANEL)..................................................................................................................................50
6.4 TYPE B (DDC) ................................................................................................................................................................................60
6.5 TYPE C (Consent switch)...........................................................................................................................................................70
6.6 HOW TO RESET THE FLAME CONTROLLER FROM REMOTE..........................................................................................71
7 InItIAL ACtIVAtIon And MAIntenAnCe��������������������������������������������������73
7.1 PROCEDURE FOR FIRST START UP.........................................................................................................................................73
7.2 MAINTENANCE.............................................................................................................................................................................77
7.3 CHANGE OF GAS TYPE ..............................................................................................................................................................78
8 ACCessoRIes��������������������������������������������������������������������������������������������������81
9 oPeRAtInG Codes/tRoUBLesHootInG���������������������������������������������������82
9.1 OVERVIEW AND OPERATING CODES/TROUBLESHOOTING..........................................................................................82
DECLARATION OF CONFORMITY ����������������������������������������������������������������������95

4
1 PREFACE
This Installation, user and maintenance manual is a guide to the installation and opera-
tion of the Air-Water gas absorption heat pump GAHP-GS/WS.
This manual is specifically intended for:
final users for the operation of the appliance according to their own•
requirements;
Installation technicians (hydraulic and electrical) for a correct installation of the•
appliance.
The manual also contains:
a section that describes all the operations necessary for the “first start-up” and for•
the“gas change”of the appliance, as well as the main maintenance operations;
an "ACCESSORIES" section with a description of accessories available and their re-•
spective reference codes.
(IN CASE) one or more APPENDIX sections in which are reported some "specific"•
information for a particular country.
References
If the appliance is connected to a Comfort Control Panel (see detail CCP in Figure 6.4
Comfort Control Panel e Accessory →48) it is switched on and controlled by the Comfort
Control Panel. In this case, refer to the manual supplied with it.
If the appliance is connected to a Direct Digital Controller (see Figure 6.3 CCI/DDC →47)
and the DDC is in controller mode, activation and control of the appliance will occur ex-
clusively by operating the DDC. In this case, refer to the manual supplied with it.
Definitions, terms and icons
APPLIANCE: this term refers to the gas absorption heat pump GAHP-GS and/or gas ab-
sorption heat pump GAHP-WS.
CCP: "Comfort Control Panel".
CCI: "Comfort Control Interface" device.
DDC: digital control panel (Direct Digital Controller).
TAC: Technical Assistance Centre (authorised by Robur S.p.A.).
SYSTEM COLD SIDE: this term refers to the renewable source plant (geothermal probes
or ground water).
SYSTEM HOT SIDE: this term refers to the primary hot water distribution system.
The icons in the edge of the manual have the following meanings:
= DANGER
= WARNING
= NOTE
= START OF OPERATING PROCEDURE
= REFERENCE to another part of the manual or other document

Installation, user and maintenance manual – GAHP-GS/WS
5
2 SAFETY WARNINGS
Packing items (plastic bags, polystyrene foam, nails, etc.) must be kept out of the reach of
children, as they are potentially dangerous.
The appliance must only be used for the purposes for which it has been designed. Any
other use is considered inappropriate and therefore dangerous. The manufacturer does
not accept any contractual or extra-contractual liability for any damage caused by im-
proper use of the appliance.
The appliance is not intended to be used by persons (including children) whose physical,
sensory and mental capacities are impaired, or who lack the necessary experience and
knowledge, unless they are supervised or instructed in its use by persons responsible
for their safety. Children must be supervised to ensure that they do not play with the
appliance.
The unit uses a water/ammoniac absorption cycle for hot/cold water production. The am-
moniac is in water solution inside a sealed circuit tested for tightness by the manufac-
turer. In case of coolant leaks, switch off the electrical power and gas supplies only if this
can be done in total safety. Contact your Authorised Service Centre.
If installed indoors, the safety valve must be ducted. Refer to Chapter 5.9 SAFETY VALVE
DISCHARGE ROUTING →43 of this manual for instructions. The unit MAY NOT BE OPER-
ATED if the safety valve is not ducted.
Frequent topping up of the hydraulic with water can result in damage due to scale and
corrosion, depending on the quality of the water being used. Make sure the system is
water tight and that the expansion tank is operational.
Concentrations of chlorides or free chlorine in the circuit above the values given in Table
5.1 Chemical and physical parameters of water →29 will damage the unit's water/am-
monia exchanger.
Close the gas supply before working on the gas circuit. On completing work on the gas
circuit, check for leakages as required by established regulations.
Do not operate the appliance if dangerous conditions exist: odour of gas in the grid
or near the appliance; problems with the electrical/gas grid or hydraulic circuit; parts
of the appliance submerged in water or otherwise damaged; controls or safety compo-
nents bypassed or defective. In these cases, ask for assistance to professionally qualified
personnel.
If you smell gas:

6
do not use electrical devices such as telephones, multimeters or other equipment•
that can cause sparks next to the appliance;
shut off gas supply closing the isolation valve;•
cut off electrical power opening the main breaker upstream of the appliance (to be•
provided by the electrical installer in an appropriate panel);
ask for assistance to professionally qualified personnel from a telephone distant•
from the appliance.
Moving parts, also during the appliance's start-up and shut-down cycles. Do not remove
guards. Make sure the appliance cannot be started up inadvertently.
POISONING HAZARD
Make sure the flue gas components are tight and compliant with established regulations.
After any intervention on these parts, check for tightness.
If the appliance is installed indoors, insufficient or non-conforming ventilation (see instal-
lation instructions) can result in hazardous leaks of combusted gases.
Make sure the ventilation and aeration outlets conform to the installation•
instructions.
If the non-conformity cannot be resolved immediately, do not start up the•
appliance.
Notify the plant operator of the non-conformity and any attendant hazards.•
BURN HAZARD
The appliance contains numerous hot parts. Do not open up the appliance or touch the
fumes outlet pipe. If necessary, contact your Technical Assistance Centre.
The appliance has a sealed circuit classified as pressure equipment, i.e. with internal pres-
sure higher than atmospheric pressure. The fluids contained in the sealed circuits are
harmful if swallowed or inhaled, or if they come into contact with the skin. Do not carry
out any operation on the sealed circuit or on its valves.
ELECTROCUTION HAZARD
Use only approved components for the electrical connections, as specified by the•
manufacturer.
Disconnect the electrical power supply before working on the appliance's internal•
electrical equipment (electrical panel, motors, control board, etc.).
Make sure the appliance cannot be started up inadvertently.•
The electrical safety of the appliance is ensured only when it is correctly connected to an
efficient grounding system, compilant with current safety regulations.
DAMAGE DUE TO AGGRESSIVE SUBSTANCES IN THE AIR SUPPLY
Hydrogenated hydrocarbons, which contain chlorine and fluorine compounds, will in-
crease the corrosion of the unit.

Installation, user and maintenance manual – GAHP-GS/WS
7
Make sure the air supply is free of aggressive substances.
ACID CONDENSATE
Drain out the condensate produced during combustion as indicated in paragraph 5.5
CONDENSATE DISCHARGE →31.
EXPLOSIVE/FLAMMABLE MATERIALS HAZARD
Do not use or store flammable materials (paper, solvents, paint, etc.) in the vicinity of the
appliance.
SUGGESTIONS FOR THE CLIENT
Stipulate a maintenance contract with an authorised specialist contractor for the annual
inspection of the appliance and maintenance when needed.
Maintenance and repairs may only be done a contractor legally authorised to work on
gas appliances and equipment.
Only accept and use original spare parts.

8
3 OVERVIEW AND TECHNICAL FEATURES
In this section you will find general information, hints on the operating principle of the
appliance and its manufacturing features. This section also contains technical data and
dimensional drawings of the appliance.
3.1 GENERAL INFORMATION
This manual is an integral and essential part of the product and must be delivered to the
user together with the appliance.
Conformity to CE standards
The absorption heat pumps of the GAHP series are certified as conforming to standard EN
12309-1 and -2 and comply with the essential requirements of the following Directives:
Gas Directive 90/396/EEC and subsequent modifications and additions.•
Efficiency Directive 92/42/EEC and subsequent modifications and additions.•
Electromagnetic Compatibility Directive 89/336/EEC and subsequent modifica-•
tions and additions.
Low Voltage Directive 89/336/EEC and subsequent modifications and additions.•
"Machinery Directive" 2006/42/EC.•
Pressurised Equipment Directive 97/23/EEC and subsequent modifications and•
additions.
UNI EN 677 Specific requirements for condensing boilers with nominal thermal ca-•
pacity up to 70 kW.
EN 378 Refrigerating systems and heat pumps.•
The emission values of nitrogen oxides (NOx) of gas absorption heat pumps of the GAHP
series are lower than 60 mg/kWh, in compliance with the requirements of the standard
RAL UZ 118 "Blauer Engel".
Information regarding the above EC certifications is given in Paragraph 3.4 TECHNICAL
DATA →12, as well as on the Nameplate of the appliance itself.
Installation and regulatory references
On receiving the appliance at the installation site, before placing into final position, check
there are no signs of transportation damages of the external panels or packaging.
Packing materials must be removed only after the appliance has been positioned on site.
After removing the packing materials, ensure that the appliance is intact and complete.
Installation of the appliance may only be carried out by professionally qualified personnel
by i.e. firms qualified according to the current legislation of the country of installation.
"Professionally qualified personnel" means personnel with specific technical competence
in the sector of heating/cooling installations and gas appliances.
Installation of the appliance must be carried out in compliance with current local and
national regulations regarding the design, installation and maintenance of heating and
cooling installations and in accordance with the manufacturer's instructions.
In particular, current regulations regarding the following aspects must be respected:
Gas equipment.•
Electrical equipment.•
Heating installations and heat pumps•

Installation, user and maintenance manual – GAHP-GS/WS
9
Every other standard and regulation concerning the installation of equipment for•
summer and winter air conditioning using gas fuel.
The manufacturer does not accept any contractual or extra-contractual liability for any
damage caused by errors in installation and/or failure to observe the abovementioned
regulations and the instructions supplied by the manufacturer itself.
Once the appliance is installed
The installer must provide the owner with a Declaration stating that the installation has
been completed in compliance with state-of-the-art practices, current national and local
regulations, and recommendations by the manufacturer.
Before contacting Technical Assistance for commissioning and first start-up, the installer
must ensure that:
the electricity and gas grids characteristics correspond to the specifications on the•
nameplate of the appliance;
the gas supply pressure is compliant with the value reported in Table 5.2 Network•
gas pressure →31 (considering a tolerance of ±15%);
the appliance is fed by the type of gas for which it is designed;•
the gas supply system and water distribution system are sealed;•
the gas and electricity supply systems are properly rated for the capacity required•
by the appliance and are equipped with all safety and control devices required by
current regulations
Check that no safety and control devices are excluded, by-passed or not properly
working.
Initial activation procedure
The complete procedure for the first start up of the appliance must be carried out by an
authorized technician according to the instructions supplied by the manufacturer.
To carry out entire procedure correctly, follow the instructions in Paragraph 7.1 PROCE-
DURE FOR FIRST START UP →73.
Warranty could be invalidated if the first start up is not carried out and validated by an
authorized technician.
Operation and maintenance of the appliance
To ensure the correct operation of the appliance and to avoid failures, control of the
switching on and off of the appliance must be done in line with the requirements of the
various types of installation.
If the appliance is connected to the Comfort Control Panel (see Figure 6.4 Comfort•
Control Panel e Accessory →48 detail CCP), the appliance may be switched on and
off exclusively by the CCP itself.
If the appliance is connected to the DDC (see Figure 6.3 CCI/DDC• →47), the appli-
ance may be switched on and off exclusively by the DDC itself.
If the appliance is NOT connected to a CCP/DDC, the appliance may be switched•
on and off exclusively by a switch on the consent circuit.

10
The appliance must never normally be switched on and off by shutting off the power
supply upstream of the Controle Device (CCP, DDC or consent switch) before having used
the latter first and waited for the shutdown cycle to end (approximately 7 minutes). The
shutdown cycle terminates when the hydraulic pump switches off (no parts in motion).
Shutting off the power supply while the appliance is running can cause permanent dam-
ages to internal components!
If the appliance fails to operate correctly, with the consequent indication of the Ma-
chine code, follow the instructions of Paragraph 9.1 OVERVIEW AND OPERATING CODES/
TROUBLESHOOTING →82.
In the event of failure of the appliance and/or breakage of any component, do not at-
tempt to repair and/or restore operation; proceed as follows:
shut off the appliance immediately (if possible and if no dangerous condition ex-•
ists) through the controls (CCP, DDC or permissive switch) and wait for the end of
the cooling down cycle (around 7 minutes);
immediately get in touch with Technical Assistance.•
Proper ordinary maintenance ensures the efficiency and good operation of the appli-
ance over time.
Carry out maintenance operations according to the instructions supplied by the
manufacturer.
For the maintenance of internal components of the appliance, contact Technical Assist-
ance; for other maintenance requirements, see Paragraph 7.2 MAINTENANCE →77.
Any repair of the appliance must be carried out by Technical Assistance, using only origi-
nal spare parts.
Failure to observe the indications above may compromise the operation and safety of the
appliance, and may invalidate warranty.
If the appliance is to be disposed of, contact the manufacturer for its correct disposal.
If the appliance is to be sold or transferred to another owner, ensure that this“Installation,
user and maintenance manual”is handed over to the new owner and installer.
3.2 NOTES ON OPERATION OF THE APPLIANCE
The appliance uses the water/ammoniac absorption thermodynamic cycle (H20 – NH3)
to produce hot water, drawing the required energy from the ground (GAHP-GS) or, in the
case of the GAHP-WS, from ground water.
The water/ammonia thermodynamic cycle used in the unit GAHP-GS/WS is realized in
a hermitically sealed circuit, directly verified by the manufacturer to ensure the perfect
tightness of all joints, thus making refrigerant top-ups completely unnecessary.
Description and general characteristics
The GAHP-GS/WS is a modulating condensation heat pump: the thermal power modu-
lates from 100% to 50% depending on load, to ensure optimal comfort.
The water/water gas absorption heat pump GAHP-WS produces hot water to +65°C for
heating purposes and up to +70°C for sanitary hot water.
The geothermal absorption heat pump GAHP-GS is available in the following versions:

Installation, user and maintenance manual – GAHP-GS/WS
11
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.•

12
3.4 TECHNICAL DATA
Table 3.1 – GS HT/LT technical data
GAHP GS LT GAHP GS HT
OPERATION WHEN HEATING
OPERATING POINT B0W50* (Brine inlet 0°C, hot Water outlet +50°C)
G.U.E. gas usage efficiency % 150 (1) 149 (1)
Thermal power delivered kW 37,7 (1) 37,6 (1)
Power recovered from
renewable source kW 12,4 12,6
OPERATING POINT B0W35* (Brine inlet 0°C, hot Water outlet +35°C)
G.U.E. gas usage efficiency % 170 (1) --
Thermal power delivered kW 42,6 (1) --
Power recovered from
renewable source kW 17,0 --
OPERATING POINT B0W65* (Brine inlet 0°C, hot Water outlet +65°C)
G.U.E. gas usage efficiency % -- 125 (1)
Thermal power delivered kW -- 31,5 (1)
Power recovered from
renewable source kW -- 7,9
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 55 65
maximum for DHW °C 70
Hot water return temperature
maximum heating °C 45 55
maximum for DHW °C 60
minimum temperature in
continuous operation** °C 20 30
Hot water flow rate
nominal l/h 3250 3170
maximum l/h 4000
minimum l/h 1400
Hot water pressure drop for nominal water flow
(B0W50) bar 0,49 (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 (with 25% glycol)
nominal (B0W50) l/h 3020
maximum l/h 4000
minimum l/h 2000
Renewable source pressure drop at nominal flow rate bar 0,51 (2)
Renewable source water return temperature maximum °C 45
Renewable source delivery water temperature minimum °C -10 -5
ELECTRICAL SPECIFICATIONS
Power supply
Voltage V 230
TYPE SINGLE PHASE
Frequency 50 Hz
supply 50
Electrical power absorption nominal kW 0,47 (5)
Degree of protection IP X5D
INSTALLATION DATA
Level of acoustic pressure at 10 meters (maximum) dB(A) 39 (7)
Minimum storage temperature °C -30
Maximum operating pressure bar 4
Maximum condensation water flow rate l/h 4,0
Water content inside the apparatus HOT SIDE l 4
COLD SIDE l 3
Water fitting TYPE F
thread " G 1 1/4
Gas fitting TYPE F
thread " G 3/4
Safety valve outlet channel fitting " G 1 1/4
Fume outlet
Diameter (∅) mm 80
Residual head Pa 80
Product configuration C63

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 conditions1.
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 Size6. →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

14
GAHP WS
Power supply
Voltage V 230
TYPE SINGLE PHASE
Frequency 50 Hz
supply 50
Electrical power absorption nominal kW 0,47 (5)
Degree of protection IP X5D
INSTALLATION DATA
Level of acoustic pressure at 10 meters (maximum) dB(A) 39 (7)
Minimum storage temperature °C -30
Maximum operating pressure bar 4
Maximum condensation water flow rate l/h 4,0
Water content inside the apparatus HOT SIDE l 4
COLD SIDE l 3
Water fitting TYPE F
thread " G 1 1/4
Gas fitting TYPE F
thread " G 3/4
Safety valve outlet channel fitting " G 1 1/4
Fume outlet
Diameter (∅) mm 80
Residual head Pa 80
Product configuration C63
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 7,7
WATER H2O kg 10
MAXIMUM PRESSURE OF THE COOLING CIRCUIT bar 35
** in transient operation, lower temperatures are allowed.
Notes:
As per EN12309-2 evaluated on actual thermal capacity. For operating conditions1.
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 Size6. →15).
Free field, frontal, directionality factor 2.7.
Table 3.3 – PED data
GAHP GS LT GAHP GS HT GAHP WS
PED data
COMPONENTS UNDER PRESSURE
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
SAFETY VALVE PRESSURE CALIBRATION bar g 35
FILLING RATIO kg of
NH3/l 0,137 0,159
"SEALED SYSTEM" TARE kg 165
FLUID GROUP GROUP 1°

Installation, user and maintenance manual – GAHP-GS/WS
15
3.5 DIMENSIONS AND SERVICE PANEL
Figure 3.1 – Size
LEGEND
A Fumes outlet dia 80
B Combustion air intake dia 80
C Manual reset fumes thermostat
D Power cable input
E Cooling fan
F Appliance on indicator
G Gas fitting dia. ¾"
H Hot water return dia. 1"¼
L Renewable source water return dia. 1"¼
M Renewable source water delivery dia. 1"¼
N Hot water delivery dia. 1"¼
Q Safety valve outlet ducting dia. 1"¼

16
Figure 3.2 – Outdoor unit dimensions
LEGEND
A Fumes outlet dia 80
B Combustion air intake dia 80
C Manual reset fumes thermostat
D Power cable input
E Cooling fan
F Appliance on indicator
G Gas fitting dia. ¾"
H Hot water return dia. 1"¼
L Renewable source water return dia. 1"¼
M Renewable source water delivery dia. 1"¼
N Hot water delivery dia. 1"¼

Installation, user and maintenance manual – GAHP-GS/WS
17
4 NORMAL OPERATION
In this section you will find all the indications necessary for the activation, regulation and
control of operation of the appliance depending on the type of installation and control
setup.
• TYPE A: controlled by CCP (see Figure 6.4 Comfort Control Panel e Accessory →48,
detail CCP).
• TYPE B: controlled by DDC (see Figure 6.3 CCI/DDC →47).
• TYPE C: controlled by consent switch (e.g. on-off switch, ambient thermostat, tim-
er, etc.).
4.1 START UP AND SHUT DOWN
Efficient operation and long life of the appliance depend largely on its correct use!
Before activating the appliance, check that:
the gas valve is open;•
the appliance is powered electrically: the general electrical switch (GS) must be in•
the «ON» position;
power supply to the CCP/DDC (if provided) is on;•
the installation technician has ensured that the hydraulic circuit is supplied in the•
correct conditions.
If these conditions are satisfied, it is possible to proceed with activation.
TYPE A: APPLIANCE CONNECTED TO COMFORT CONTROL PANEL (CCP)
If the appliance is connected to a Comfort Control Panel (see detail CCP in Figure 6.4
Comfort Control Panel e Accessory →48) it is switched on and controlled by the Comfort
Control Panel. In this case, refer to the manual supplied with it.
The appliance must never normally be switched on and off by shutting off the power
supply upstream of the Comfort Control Panel before having used the latter first and
waited for the shutdown cycle to end (approximately 7 minutes). The shutdown cycle
terminates when the hydraulic pump switches off (no parts in motion).
Shutting off the power supply while the appliance is running can cause permanent dam-
ages to internal components!
TYPE B: APPLIANCE CONNECTED TO A DIRECT DIGITAL CONTROLLER (DDC)
If the appliance is connected to a Direct Digital Controller (see Figure 6.3 CCI/DDC →47)
and the DDC is in controller mode, activation and control of the appliance will occur ex-
clusively by operating the DDC. In this case, refer to the manual supplied with it.
The appliance must never normally be switched on and off by shutting off the power
supply upstream of the DDC before having used the latter first and waited for the shut-
down cycle to end (approximately 7 minutes). The shutdown cycle terminates when the
hydraulic pump switches off (no parts in motion).
Shutting off the power supply while the appliance is running can cause permanent dam-
ages to internal components!

18
TYPE C: STANDALONE APPLIANCE
Standalone appliances must be activated and deactivated only by means of the consent
switch provided by the electrical installation technician.
According to requirements, this consent switch may be an on/off button, an ambient
thermostat, a programmable timer, or one or more voltage free contacts controlled by
another process. For details about the type of on/off command installed, contact the
plant’s electrical installation technician.
The appliance must never normally be switched on and off by shutting off the power
supply upstream of the Controle Device (CCP, DDC or consent switch) before having used
the latter first and waited for the shutdown cycle to end (approximately 7 minutes). The
shutdown cycle terminates when the hydraulic pump switches off (no parts in motion).
Shutting off the power supply while the appliance is running can cause permanent dam-
ages to internal components!
Start up
Switch on the appliance by means of the on/off command (placing it in the "ON"
position).
Shut down
Switch off the appliance via the on/off command (placing it in the "OFF" position).
The shutdown cycle takes approximately 7 minutes to complete.
The on/off command is essential! Do not switch the appliance on or off by connecting it
to or disconnecting it from the power supply directly, as this may be a source of danger
and in any case damage the appliance or the plants connected to it.
Visualising and clearing of operating codes
Operating codes can be generated:
by the S61 on-board controller;•
by the CCP/DDC (if present).•
The operating codes generated by the S61 controller are displayed on its screen and can
also be viewed on the CCI (if present) or DDC (if present).
Operating codes generated by the controller can be cleared through the board itself or
from the CCI/DDC (if fitted and allowed).
For a description of the operating codes generated by the electronic board and how to
reset them, refer to the list of operating codes contained in Table 9.1 TABLE OF OPERAT-
ING CODES generated by the S61 electronic board (firmware version 3.024) →82.
The controller (see Figure 6.1 Electronic board S61 →46) is located inside the electrical
panel of the appliance and the display may be viewed through the viewing hole on the
front panel of the unit itself.
The Machine Codes generated by the CCI/DDC may only be viewed on the display of the
CCI/DDC and may be cleared only through the CCI/DDC.

Installation, user and maintenance manual – GAHP-GS/WS
19
For the operating codes generated by the CCP/DDC, refer to the manuals supplied with
the unit.
Operating codes generated by the electronic board during the start-up of the
appliance
If the appliance remains inactive for a prolonged period, it is possible that air is present in
the gas pipes. In this case, activation fails and the appliance reports the operating code:
"u_12" - flame controller arrest (temporary) (see Paragraph 9.1 OVERVIEW AND OPERAT-
ING CODES/TROUBLESHOOTING →82) and after a brief interval the appliance automati-
cally launches the start up procedure again. If code (u_12) is signalled 3 times on succes-
sive activation attempts, the code persists, the appliance locks out the flame controller
and displays the following operating code: "E_12" - flame controller arrest (see Paragraph
9.1 OVERVIEW AND OPERATING CODES/TROUBLESHOOTING →82). In this case reset is
not automatic.
To restore operation of the appliance, carry out a reset of the flame control unit via menu
2 of the controller: the procedure is illustrated in Paragraph 4.3 RESET OPERATIONS →22.
After it is reset, the appliance will make a new attempt to activate.
If the appliance locks out several times, contact a Robur TAC by calling the Technical Serv-
ice Department of Robur S.p.A. (tel. [phone]).
When activation is successful, the appliance is managed by the on-board controller (see
following paragraph).
4.2 ONBOARD ELECTRONICS
The following descriptions refer to the S61 controller with firmware version 3.024.
The appliance is fitted with an S61 microprocessor controller with Mod10 modulation
controller mounted above it (see Figure 4.1 On-board controller →20).
The S61 controller, in the electrical panel, controls the appliance and displays data, mes-
sages and operating codes.
Programming, control and monitoring of the appliance take place by interacting with the
display A and knob B shown in Figure 4.1 On-board controller →20. The CAN-BUS port
connects one or several appliances to the CCP (if present) or a DDC (if present).
The Mod10 controller (detail D in Figure 4.1 On-board controller →20) is used for com-
bustion modulation and variable rate pump control.

20
Figure 4.1 – On-board controller
S61 + Mod10
LEGEND
A 4 digit display
B Knob
C CAN port
D Mod10 controller









Description of menu of S61 controller
The parameters and settings of the appliance are grouped in the menus shown on the
controller’s display:
Table 4.1 – Menu of electronic board
MENU MENU DESCRIPTION THE DISPLAY SHOWS
Menu 0 VIEW DATA (TEMPERATURE, VOLTAGE, PUMP SPEED, ECC...) 0.
Menu 1 VIEW ALL PARAMETERS 1.
Menu 2 ENTER ACTIONS 2.
Menu 3 USER SETTINGS (THERMOSTATING, SET-POINT, T. DIFFERENTIAL) 3.
Menu 4 INSTALLATION TECHNICIAN SETTINGS 4.
Menu 5 TECHNICAL ASSISTANCE CENTRE SETTINGS 5.
Menu 6 TECHNICAL ASSISTANCE CENTRE SETTINGS (MACHINE TYPE) 6.
Menu 7 VIEW DIGITAL IMPUTS 7.
Menu 8 (MENU NOT USED) 8.
E EXIT MENU E.
Menu list of electronic board
Menus 0, 1 and 7 are Viewing Menus: they only allow the information displayed to be
read, and not modified. Menu 0 shows the appliance operating data in real time. Menu 1
shows the parameters that characterise the operation of the appliance and their current
values.
Menu 7 is to be used ONLY by the Robur TAC.
To view the information contained in these menus, proceed as illustrated in the para-
graph "How to acces the menus".
Menu 2 is an execution menu: it allows the operations of resetting the flame control unit,
error reset and the manual defrosting command to be performed.
To perform these procedures, see Paragraph 4.3 RESET OPERATIONS →22.
Menu 3 is a Settings Menu: it allows the values displayed to be set. The correct values of
these parameters, for optimum performance of the appliance with the plant to be used