Robur GAHP-A HT S1 Operating instructions

Installation, user and
maintenance manual
GAHP-A
powered by gas and renewable energies
Air-Water gas absorption heat pump

Revisione: P
Codice: D-LBR548
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 led 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 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 manual without prior notice.

Installation, user and maintenance manual – GAHP-A
3
Index of Contents
1 PRefACe������������������������������������������������������������������������������������������������������������4
2 sAfetY WARnInGs������������������������������������������������������������������������������������������5
2.1 WARRANTY TERMS ....................................................................................................................................................................... 7
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 ........................................................................................................................................................................11
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 AND MANUAL DEFROSTING...........................................................................................................22
4.4 OPERATING SETTINGS...............................................................................................................................................................24
4.5 PROLONGED PERIODS OF DISUSE........................................................................................................................................24
5 HYdRAULIC InstALLAtIon ��������������������������������������������������������������������������27
5.1 GENERAL INSTALLATION PRINCIPLES..................................................................................................................................27
5.2 POSITION OF THE APPLIANCE ................................................................................................................................................27
5.3 HYDRAULIC CONNECTIONS....................................................................................................................................................30
5.4 GAS SUPPLY...................................................................................................................................................................................32
5.5 CONDENSATE DISCHARGE.......................................................................................................................................................33
5.6 FILLING OF HYDRAULIC CIRCUIT...........................................................................................................................................34
5.7 EXHAUST FLUE GAS....................................................................................................................................................................36
5.8 PROGRAMMING OF HYDRAULIC PARAMETERS ...............................................................................................................37
6 eLeCtRICAL InstALLAtIon��������������������������������������������������������������������������40
6.1 ELECTRICAL DIAGRAM OF THE APPLIANCE.......................................................................................................................45
6.2 HOW TO CONNECT THE APPLIANCE ELECTRICALLY.......................................................................................................46
6.3 TYPE A (Comfort Control Panel).............................................................................................................................................47
6.4 TYPE B (DDC) ................................................................................................................................................................................56
6.5 TYPE C (Consent switch)...........................................................................................................................................................66
6.6 HOW TO RESET THE FLAME CONTROLLER FROM REMOTE..........................................................................................67
7 InItIAL ACtIVAtIon And MAIntenAnCe��������������������������������������������������69
7.1 PROCEDURE FOR FIRST START UP.........................................................................................................................................69
7.2 MAINTENANCE.............................................................................................................................................................................73
7.3 CHANGE OF GAS TYPE ..............................................................................................................................................................74
8 ACCessoRIes��������������������������������������������������������������������������������������������������77
9 oPeRAtInG Codes/tRoUBLesHootInG���������������������������������������������������78
9.1 OVERVIEW AND OPERATING CODES/TROUBLESHOOTING..........................................................................................78
DECLARATLON OF CONFORMITY������������������������������������������������������������������������91

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-A".
This manual is specically intended for:
nal 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“rst 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 "specic"•
information for a particular country.
References
If the appliance is connected to a Comfort Control Panel (see detail CCP in Figure 6.3
Comfort Control Panel e Accessory →43) 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 6.4 CCI/DDC →44)
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.
Denitions, terms and icons
APPLIANCE: this term refers to the Air-Water gas absorption heat pump "GAHP-A".
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.).
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-A
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 water production. The ammo-
niac is in water solution inside a sealed circuit tested for tightness by the manufacturer.
In case of coolant leaks, switch o the electrical power and gas supplies only if this can be
done in total safety. Contact your Technical Assistance Centre.
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 →31 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 qualied
personnel.
If you smell gas:
do not use electrical devices such as telephones, multimeters or other equipment•
that can cause sparks next to the appliance;
shut o gas supply closing the isolation valve;•
cut o electrical power opening the main breaker upstream of the appliance (to be•
provided by the electrical installer in an appropriate panel);

6
ask for assistance to professionally qualied 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 ue gas components are tight and compliant with established regulations.
After any intervention on these parts, check for tightness.
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 classied as pressure equipment, i.e. with internal pres-
sure higher than atmospheric pressure. The uids 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 specied 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
ecient grounding system, compilant with current safety regulations.
DAMAGE DUE TO AGGRESSIVE SUBSTANCES IN THE AIR SUPPLY
Hydrocarbons containing chlorine and uorine compounds, will increase corrosion. 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 →33.
EXPLOSIVE/FLAMMABLE MATERIALS HAZARD
Do not use or store ammable materials (paper, solvents, paint, etc.) in the vicinity of the
appliance.
RECOMMENDATION. 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 by a contractor legally authorised to work on
gas appliances and equipment. Use only original spare parts.

Installation, user and maintenance manual – GAHP-A
7
2.1 WARRANTY TERMS
Warranty can be invalidated by each one of the following conditions:
faulty installation•
improper use•
failure to follow the manufacturer’s indications about installation, use and•
maintenance
alteration or modication of the product or any part•
operational conditions extreme or however outside of the operational ranges de-•
ned by the manufacturer
damages caused by external agents such as salts, chlorine, sulphur or other chemi-•
cal substances contained in the installation water or present in the air of the instal-
lation site
abnormal actions transmitted by the plant or installation to the appliance (me-•
chanical stresses, vibrations, thermal expansions, overvoltages…)
incidental damages or force majeure•

8
3 OVERVIEW AND TECHNICAL FEATURES
In this section you will nd 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 certied 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 modications and additions.•
Eciency Directive 92/42/EEC and subsequent modications and additions.•
Electromagnetic Compatibility Directive 89/336/EEC and subsequent modica-•
tions and additions.
Low Voltage Directive 89/336/EEC and subsequent modications and additions.•
Machinery Directive 2006/42/EC.•
Pressurised Equipment Directive 97/23/EEC and subsequent modications and•
additions.
UNI EN 677 Specic 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 certications is given in Paragraph 3.4 TECHNICAL
DATA →11, 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 nal 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 qualied personnel
by i.e. rms qualied according to the current legislation of the country of installation.
"Professionally qualied personnel" means personnel with specic 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 must be observed:
Gas equipment.•
Electrical equipment.•
Heating installations and heat pumps.•

Installation, user and maintenance manual – GAHP-A
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 rst start-up, the installer
must ensure that:
the electricity and gas grids characteristics correspond to the specications on the•
nameplate of the appliance;
the gas supply pressure is compliant with the value reported in Table 5.2 Network•
gas pressure →33 (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 rst 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 →69.
Warranty could be invalidated if the rst 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 o 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 6.3 Comfort•
Control Panel e Accessory →43 detail CCP), the appliance may be switched on and
o exclusively by the CCP itself.
If the appliance is connected to the DDC (see Figure 6.4 CCI/DDC• →44), the appli-
ance may be switched on and o exclusively by the DDC itself.
If the appliance is NOT connected to a CCP/DDC, the appliance may be switched•
on and o exclusively by a switch on the consent circuit.

10
The appliance must never normally be switched on and o by shutting o the power
supply upstream of the Controle Device (CCP, DDC or consent switch) before having used
the latter rst and waited for the shutdown cycle to end (approximately 7 minutes). The
shutdown cycle terminates when the hydraulic pump switches o (no parts in motion).
Shutting o 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 →78.
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 o 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 eciency 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 →73.
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 OFTHE APPLIANCE
The appliance uses the water/ammonia absorption thermodynamic cycle (H20 – NH3) to
produce hot water, using atmospheric air as renewable energy source.
The water/ammonia thermodynamic cycle used in the unit GAHP-A is realized in a her-
mitically sealed circuit, directly veried by the manufacturer to ensure the perfect tight-
ness of all joints, thus making refrigerant top-ups completely unnecessary.
Description and general characteristics
The air-water gas absorption heat pump GAHP-A is available in the following versions:
Version• HT: optimised for high temperature distribution systems (radiators, fan
coils); it produces hot water up to +65°C in heating mode and up to +70°C in Do-
mestic Hot Water mode.
Version• LT: optimised for low temperature distribution systems (heating oor, low
temperature radiators); it produces hot water up to +55°C in heating mode and up
to +70°C in Domestic Hot Water mode.

Installation, user and maintenance manual – GAHP-A
11
The fan can be:
low consumption (S1): reduction of the electrical consumption and reduction of•
noise emissions
low noise (S): reduction of noise emissions•
standard•
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 (Standard ventilation) →15, Figure 3.2 Di-
mensions (low consumption ventilation – S1) →15 o Figure 3.3 Dimensions (low noise
version) →16). The fumes outlet must be connected to a ue (for further details, see
Paragraph 5.7 EXHAUST FLUE GAS →36).
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 ame detection•
managed by an electronic ame control box.
Titanium stainless steel shall-and-tube heat exchanger, with external insulation.•
Recovery heat exchanger (AISI 304L).•
Air heat exchanger with single-row nned coil, manufactured with steel pipes and•
aluminium ns.
Automatic microprocessor-controlled two-ways defrosting valve.•
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 →41 and 6.2 Mod10
controller →42).
Water owmeter.•
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 ame control box.•
Double shutter electric gas valve.•
Condensate discharge sensor.•
3.4 TECHNICAL DATA
Table 3.1 – GAHP-A LT technical data
GAHP-A LT S1 GAHP-A LT S GAHP-A LT
OPERATION WHEN HEATING
OPERATING POINT A7W50 G.U.E. gas usage eciency % 151 (1)
Thermal power kW 38,0 (1)
OPERATING POINT A7W35 G.U.E. gas usage eciency % 165 (1)
Thermal power kW 41,7 (1)

12
GAHP-A LT S1 GAHP-A LT S GAHP-A LT
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
maximum for DHW °C 70
Hot water return temperature
maximum heating °C 45
maximum for DHW °C 60
minimum temperature in
continuous operation** °C 20
Hot water ow rate
nominal l/h 3000
maximum l/h 4000
minimum l/h 1400
Hot water pressure drop nominal water pressure (A7W50) bar 0,43 (2)
Ambient air temperature (dry
bulb) maximum °C 40
minimum °C -15 (7)
Thermal dierential nominal °C 10
gas consumption
methane G20 (nominal) m3/h 2,72 (3)
methane G20 (MIN) m3/h 1,34
G25 (nominal) m3/h 3,16 (9)
G25 (MIN) m3/h 1,57
G30 (nominal) kg/h 2,03 (4)
G30 (MIN) kg/h 0,99
G31 (nominal) kg/h 2,00 (4)
G31 (MIN) kg/h 0,98
ELECTRICAL SPECIFICATIONS
Power supply
Voltage V 230
TYPE SINGLE PHASE
Frequency 50 Hz
supply 50
Electrical power absorption nominal kW 0,83 (5) 1,09 (5) 0,90 (5)
minimum kW 0,56 (5) -
Degree of protection IP X5D
INSTALLATION DATA
Sound power Lw (max) dB(A) 75,3 (8) 73 (11) 82,1 (8)
Sound power Lw (min) dB(A) 72,3 (8) -
Sound pressure Lp at 5 metres (max) dB(A) 53,3 (10) 51 (11) 60,1 (10)
Sound pressure Lp at 5 metres (min) dB(A) 50,3 (10) -
Minimum storage temperature °C -30
Maximum operating pressure bar 4
Maximum condensation water ow rate l/h 4
Water content inside the apparatus l 4
Water tting TYPE F
thread " G 1 1/4
Gas tting TYPE F
thread " G 3/4
Fume outlet Diameter (∅) mm 80
Residual head Pa 80
Size
width mm 848 (6)
height mm 1537 (6) 1281 (6)
depth mm 1258
Weight In operation kg 400 390
Portata d'aria richiesta m3/h 11000
Prevalenza residua ventilatore Pa 40
GENERAL INFORMATION
INSTALLATION MODE B23P, B33, B53P
COOLING FLUID AMMONIA R717 kg 7
WATER H2O kg 10
MAXIMUM PRESSURE OFTHE 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 ow rates dierent from the nominal refer to the Design Manual.2.

Installation, user and maintenance manual – GAHP-A
13
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 (Standard ventila-6. tion) →15, 3.2 Dimensions (low consumption ventilation – S1) →15and Figure 3.3
Dimensions (low noise version) →16).
As an option, a version for operation down to -30 °C is available.7. Sound power values measured according to EN ISO 9614.8. PCI 29.25 MJ/m3 (1013 mbar – 15 ° C).9. Maximum sound pressure values in free eld, with directionality factor 2, obtained10. from sound power level in compliance with norm EN ISO 9614.
Maximum sound pressure values measured in free eld, direction factor 2, accord-11. ing to EN 3744.
Table 3.2 – GAHP-A HT technical data
GAHP-A HT S1 GAHP-A HT S GAHP-A HT
OPERATION WHEN HEATING
OPERATING POINT A7W50 G.U.E. gas usage eciency % 152 (1)
Thermal power kW 38,3 (1)
OPERATING POINT A7W65 G.U.E. gas usage eciency % 124 (1)
Thermal power kW 31,1 (1)
OPERATING POINT A-7W50 G.U.E. gas usage eciency % 127 (1)
Thermal power kW 32,0 (1)
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
maximum for DHW °C 60
minimum temperature in
continuous operation** °C 30
Hot water ow rate
nominal l/h 3000
maximum l/h 4000
minimum l/h 1400
Hot water pressure drop nominal water pressure (A7W50) bar 0,43 (2)
Ambient air temperature (dry
bulb) maximum °C 40
minimum °C -15 (7)
Thermal dierential nominal °C 10
gas consumption
methane G20 (nominal) m3/h 2,72 (3)
methane G20 (MIN) m3/h 1,34
G25 (nominal) m3/h 3,16 (9)
G25 (MIN) m3/h 1,57
G30 (nominal) kg/h 2,03 (4)
G30 (MIN) kg/h 0,99
G31 (nominal) kg/h 2,00 (4)
G31 (MIN) kg/h 0,98
ELECTRICAL SPECIFICATIONS
Power supply
Voltage V 230
TYPE SINGLE PHASE
Frequency 50 Hz
supply 50
Electrical power absorption nominal kW 0,83 (5) 1,09 (5) 0,90 (5)
minimum kW 0,56 (5) -
Degree of protection IP X5D
INSTALLATION DATA
Sound power Lw (max) dB(A) 75,3 (8) 73 (11) 82,1 (8)
Sound power Lw (min) dB(A) 72,3 (8) -
Sound pressure Lp at 5 metres (max) dB(A) 53,3 (10) 51 (11) 60,1 (10)
Sound pressure Lp at 5 metres (min) dB(A) 50,3 (10) -
Minimum storage temperature °C -30

14
GAHP-A HT S1 GAHP-A HT S GAHP-A HT
Maximum operating pressure bar 4
Maximum condensation water ow rate l/h 4
Water content inside the apparatus l 4
Water tting TYPE F
thread " G 1 1/4
Gas tting TYPE F
thread " G 3/4
Fume outlet Diameter (∅) mm 80
Residual head Pa 80
Size
width mm 848 (6)
height mm 1537 (6) 1281 (6)
depth mm 1258
Weight In operation kg 400 390
GENERAL INFORMATION
INSTALLATION MODE B23P, B33, B53P
COOLING FLUID AMMONIA R717 kg 7
WATER H2O kg 10
MAXIMUM PRESSURE OFTHE 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 ow rates dierent 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 (Standard ventila-6. tion) →15, 3.2 Dimensions (low consumption ventilation – S1) →15and Figure 3.3
Dimensions (low noise version) →16).
As an option, a version for operation down to -30 °C is available.7. Sound power values measured according to EN ISO 9614.8. PCI 29.25 MJ/m3 (1013 mbar – 15 ° C).9. Maximum sound pressure values in free eld, with directionality factor 2, obtained10. from sound power level in compliance with norm EN ISO 9614.
Maximum sound pressure values measured in free eld, direction factor 2, accord-11. ing to EN 3744.
Table 3.3 – PED data
GAHP-A HT GAHP-A LT
PED data
COMPONENTS UNDER
PRESSURE
Generator l 18,6
Leveling chamber l 11,5
Evaporator l 3,7
Cooling volume transformer l 4,5
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 0,146
FLUID GROUP GROUP 1°

Installation, user and maintenance manual – GAHP-A
15
3.5 DIMENSIONS AND SERVICE PANEL
Figure 3.1 – Size (Standard ventilation)
Front and side views (dimensions in mm).
LEGEND
* Posizione dei supporti antivibranti (opzionali)
Figure 3.2 – Dimensions (low consumption ventilation – S1)
Front and side views (dimensions in mm).

16
Figure 3.3 – Dimensions (low noise version)
Front and side views (dimensions in mm).
LEGEND
* Posizione dei supporti antivibranti (opzionali)
Figure 3.4 – Service plate
Hydraulic/gas unions detail
LEGEND
G Gas tting Ø ¾”F
I Inlet water tting Ø 1¼”F
O Outlet water tting Ø 1¼”F

Installation, user and maintenance manual – GAHP-A
17
4 NORMAL OPERATION
In this section you will nd 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 6.3 Comfort Control Panel e Accessory →43,
detail CCP).
• TYPE B: controlled by DDC (see Figure 6.4 CCI/DDC →44).
• TYPE C: controlled by consent switch (e.g. on-o switch, ambient thermostat, tim-
er, etc.).
4.1 START UP AND SHUT DOWN
Ecient 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 satised, 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 6.3
Comfort Control Panel e Accessory →43) 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 o by shutting o the power
supply upstream of the Comfort Control Panel before having used the latter rst and
waited for the shutdown cycle to end (approximately 7 minutes). The shutdown cycle
terminates when the hydraulic pump switches o (no parts in motion).
Shutting o 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 6.4 CCI/DDC →44)
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 o by shutting o the power
supply upstream of the DDC before having used the latter rst and waited for the shut-
down cycle to end (approximately 7 minutes). The shutdown cycle terminates when the
hydraulic pump switches o (no parts in motion).
Shutting o the power supply while the appliance is running can cause permanent dam-
ages to internal components!

18
TYPE C: STANDALONE APPLIANCE
Stand alone 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/o 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/o command installed, contact the
plant’s electrical installation technician.
The appliance must never normally be switched on and o by shutting o the power
supply upstream of the Controle Device (CCP, DDC or consent switch) before having used
the latter rst and waited for the shutdown cycle to end (approximately 7 minutes). The
shutdown cycle terminates when the hydraulic pump switches o (no parts in motion).
Shutting o 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/o command (placing it in the "ON"
position).
Shut down
Switch o the appliance via the on/o command (placing it in the "OFF" position).
The shutdown cycle takes approximately 7 minutes to complete.
The on/o command is essential! Do not switch the appliance on or o 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 tted 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 (rmware version 3.024) →78.
The controller (see Figure 6.1 Electronic board S61 →41) 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-A
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" - ame controller arrest (temporary) (see Paragraph 9.1 OVERVIEW AND OPERAT-
ING CODES/TROUBLESHOOTING →78) and after a brief interval the appliance automati-
cally launches the start up procedure again. If code (u_12) is signalled 4 times on succes-
sive activation attempts, the code persists, the appliance locks out the ame controller
and displays the following operating code: "E_12" – ame controller arrest (see Paragraph
9.1 OVERVIEW AND OPERATING CODES/TROUBLESHOOTING →78). In this case reset is
not automatic.
To restore operation of the appliance, carry out a reset of the ame control unit via menu
2 of the controller: the procedure is illustrated in Paragraph 4.3 RESET OPERATIONS AND
MANUAL DEFROSTING →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 rmware version 3.024.
The appliance is tted 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 (see detail D in Figure 4.1 On-board controller →20) is used for
combustion 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 modied. 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 ame control unit,
error reset and the manual defrosting command to be performed.
To perform these procedures, see Paragraph 4.3 RESET OPERATIONS AND MANUAL
DEFROSTING →22.