Lochinvar GAHP-A HT STD, GAHP-A HT S1 Installation, Use And Maintenance Manual

Installation, Use and
Maintenance Manual

GAHP-A

powered by gas and renewable energies

Air-Water gas absorption heat pump

Revision: B
Code: D-LBR724

This Manual has been drawn up and printed by Lochinvar; whole or partial reproduction of this Manual is
forbidden.

The original is led at Lochinvar.
Any use of this Manual other than for personal referencing must be previously authorised by Lochinvar.
The rights of those who have legitimately led the registered trademarks contained within this publication are not

aected.
With the aim of improving the quality of its products, Lochinvar reserves the right to modify the data and contents

of this Manual without prior notice.

Installation, Use and Maintenance Manual – GAHP-A

3

INDEX OF CONTENTS

I INTRODUCTION ...............................................4

II SYMBOLS AND DEFINITIONS .........................4

II.1 Key to symbols ...................................................................... 4

II.2 Terms and denitions .........................................................4

III WARNINGS .......................................................4

III.1 General and safety warnings ........................................... 4

III.2 Conformity .............................................................................6

III.3 Exclusions of liability and warranty ............................... 6

1 FEATURES AND TECHNICAL DATA ................6

1.1 Features ...................................................................................6

1.2 Dimensions ............................................................................7

1.3 Components ..........................................................................9

1.4 Electrical wiring diagram ............................................... 12

1.5 Electronic boards .............................................................. 13

1.6 Operation mode ................................................................ 15

1.7 Controls ................................................................................ 16

1.8 Technical characteristics ................................................. 16

2 TRANSPORT AND POSITIONING .................18

2.1 Warnings .............................................................................. 18

2.2 Handling ............................................................................... 18

2.3 Appliance positioning ..................................................... 19

2.4 Minimum clearance distances...................................... 20

2.5 Mounting base ................................................................... 20

3 HEATING ENGINEER ......................................20

3.1 Warnings .............................................................................. 20

3.2 Installation ........................................................................... 21

3.3 Hydraulic connections .................................................... 21

3.4 Water circulation pump .................................................. 21

3.5 Anti-icing function............................................................ 21

3.6 Anti-icing liquid ................................................................. 21

3.7 System water quality ....................................................... 22

3.8 Installation lling .............................................................. 22

3.9 Fuel gas supply .................................................................. 22

3.10 Combustion products exhaust .................................... 23

3.11 Flue gas condensate discharge .................................... 24

3.12 Defrosting water drainage ............................................. 24

4 ELECTRICAL INSTALLER ...............................24

4.1 Warnings .............................................................................. 24

4.2 Electrical systems .............................................................. 25

4.3 Electrical power supply ................................................... 26

4.4 Set-up and control ............................................................ 27

4.5 Water circulation pump .................................................. 30

5 FIRST STARTUP ............................................33

5.1 Preliminary checks ............................................................ 33

6 NORMAL OPERATION ...................................34

6.1 Warnings .............................................................................. 34

6.2 Switch on and o .............................................................. 34

6.3 Messages on the display ................................................ 34

6.4 Electronic adjustment on the machine – Menus

and parameters of the S61 board ............................... 35

6.5 Modifying settings ............................................................ 36

6.6 Restarting a locked-out unit - Reset ........................... 36

6.7 Eciency .............................................................................. 37

7 MAINTENANCE ..............................................37

7.1 Warnings .............................................................................. 37

7.2 Pre-emptive maintenance ............................................. 37

7.3 Scheduled routine maintenance ................................. 38

7.4 Periods of inactivity .......................................................... 38

8 DIAGNOSTICS ................................................38

8.1 Operative codes................................................................. 38

APPENDICES ........................................................41

1 Declaration of Conformity ............................................. 41

2 Product che....................................................................... 42

I Introduction

4

I INTRODUCTION

Manual

This Manual is an integral part of the GAHP-A unit 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-A unit needs a control
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 Ab­sorption Heat Pump).

TAC = Technical Assistance Centre authorised by Lochinvar.
External request = generic control device (e.g. thermostat,

clock or any other system) equipped with a voltage-free NO con­tact and used as control to start/stop the GAHP unit.

CCI Controller (Comfort Controller Interface) = optional adjust-
ment device Lochinvar which lets you manage up to three mod­ulating heat only GAHP units (A, WS, GS).
CCP Controller (Comfort Control Panel) = adjustment device
Lochinvar 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 Lochinvarappliances (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 func­tions (heating/cooling/DHW production service demands, and
control of system components such as third party generators,
adjustment valves, circulating pumps, probes).
Heat generator = equipment (e.g. boiler, heat pump, etc..) pro­ducing heating and/or DHW.
GUE (Gas Utilization Eciency) = eciency index of gas heat
pumps, equal to the ratio between the thermal energy pro­duced and the energy of the fuel used (relative to LCV, lower
caloric value).
First start-up = 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 devic­es 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
appliances, 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

regulations 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 manufactur­er's instructions.

Hazardous situations

▶

Do not start the appliance in hazardous conditions,
such as: gas smell, problems with the plumbing/elec­trical/gas system, parts of the appliance under water

III Warnings

Installation, Use and Maintenance Manual – GAHP-A

5

or damaged, malfunctioning, disabling or bypassing
control and safety devices.

▶

In case of danger, request intervention by skilled
personnel.

▶

In case of danger, switch o the electrical power and
gas supplies only if this can be done in total safety.

▶

Do not entrust children, persons with physical, senso­ry or mental disabilities or persons with poor knowl­edge 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 tight­ness test according to regulations in force.

Gas smell

If you smell gas:

▶

Do not use electrical devices such as telephones,
multimeters 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 electri­cal 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 compo­nents 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 pres­sure vessel, the tightness of which is tested by the
manufacturer.

▶

Do not carry out any intervention on the sealed cir­cuit 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
ingested, inhaled or comes in contact with the skin.

▶

In the event of coolant leak keep away and discon­nect 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 pro­vided 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 ac­cording 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
uorine compounds cause corrosion. The supply/venti­lation air of the appliance 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. 24, in com­pliance 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 pro­vided (DDC, CCP/CCI or external request).

1 Features and technical data

6

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 break­age 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
operation of the appliance over time.

▶

Maintenance must be performed according to the
manufacturer's instructions (see Chapter 7 p. 37)
and in compliance with current regulations.

▶

Appliance maintenance and repairs may only be
entrusted to rms legally authorised to work on gas
appliances and systems.

▶

Enter into a maintenance contract with an author­ised specialised rm for routine maintenance and for
servicing in case of need.

▶

Only use original parts.

Decommissioning and disposal

If the appliance is to be disposed of, contact the manu­facturer for its disposal.

Keep the Manual

This "Installation, Use and Maintenance Manual" must
always 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.

▶

2004/108/EC "Electromagnetic Compatibility Directive" as
amended and added.

▶

2006/95/EC "Low Voltage Directive" as amended and added.

▶

2006/42/EC "Machine Directive" as amended and added.

▶

97/23/EEC "Pressure Equipment Directive" as amended and
added.

Furthermore, they comply with the requirements of the follow­ing 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 sys­tems shall be carried out in compliance with current applicable
regulations, depending on the Country and location, and in ac­cordance with the manufacturer's instructions. In particular, reg­ulations 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 ex­haust.

▶

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
manufacturer for any damage caused by incorrect in­stallation and/or improper use and/or failure to comply
with regulations and with the manufacturer's direc­tions/instructions shall be disclaimed.

In particular, the warranty on the appliance may be ren­dered 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
manufacturer.

▶

Damages caused by external agents such as salts,
chlorine, sulphur or other chemical substances con­tained in the installation water or present in the air of
the installation site.

▶

Abnormal actions transmitted by the plant or instal­lation to the appliance (mechanical stresses, pres­sure, vibrations, thermal dilations, power surges...).

▶

Accidental damages or due to force majeure.

1 FEATURES AND TECHNICAL DATA

1.1 FEATURES

Operation

Based on the thermodynamic water-ammonia absorption cycle
(H20–NH3), the appliance produces hot water using outdoor air
as a renewable energy source (cold source) and natural gas (or
LPG) as primary energy.

The thermodynamic cycle takes place within a hermetically
sealed circuit, in welded construction, perfectly tight, facto­ry-tested, which does not require any maintenance or coolant
top-ups.

Mechanical and thermo-hydraulic components

▶

steel sealed circuit, externally treated with epoxy paint;

1 Features and technical data

Installation, Use and Maintenance Manual – GAHP-A

7

▶

sealed combustion chamber (type C) suitable for outdoor
installations;

▶

metal mesh radiant burner equipped with ignition and ame
detection device, controlled by an electronic control unit;

▶

titanium stainless steel shell-and-tube water heat exchang­er, externally insulated;

▶

stainless steel, ue gas latent heat recovery exchanger;

▶

air exchanger with nned coil, with steel pipe and alumini­um ns;

▶

automatic microprocessor-controlled nned coil automatic
defrosting valve;

▶

standard or S1 silenced fan (reduction of electrical consump­tion and reduction of sound emission).

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 owmeter;

▶

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;

▶

anti-icing function for water circuit;

▶

condensate discharge obstruction sensor.

Standard or silenced fan

According to the type of fan the GAHP-A unit is available in two
versions:

▶

standard fan, for applications that do not require a special
degree of noiselessness;

▶

silenced fan, for applications that require a high degree of
noiselessness;

1.2 DIMENSIONS

Figure 1.1 – Service plate





























Hydraulic/gas unions detail

LEGEND
G Gas tting Ø ¾” F
B Inlet water tting Ø 1¼” F
A Outlet water tting Ø 1¼” F

1 Features and technical data

8

Figure 1.2 – Size (Standard ventilation)

Figure 1.3 – Dimensions (low consumption silenced fan)

1 Features and technical data

Installation, Use and Maintenance Manual – GAHP-A

9

1.3 COMPONENTS

Figure 1.4 – Internal components - front view

1

2

4

5

6

7

3

10

12

11

8

9

LEGEND

1. Fan (S1 version)

2. Flue gas tapping point

3. Gas valve

4. Combustion air inlet

5. Blower

6. Ignition transformer

7. Tmix Probe

8. Oil pump

9. Water return tting: “G 1”¼ F

10. Water inlet connection: “G 1”¼ F

11. Gas connection

12. TA Probe

1 Features and technical data

10

Figure 1.5 – Internal components - left side view























LEGEND

1. Flue gas thermostat reset

2. Flue gas thermostat sensor

3. Ø 80mm ue gas drain

4. Generator n temperature sensor

5. Switch on and detection electrodes

6. Condensate sensor

1 Features and technical data

Installation, Use and Maintenance Manual – GAHP-A

11

Figure 1.6 – Internal components - right side view























LEGEND

1. TG Probe

2. Safety valve

3. Delivery pipe owmeter

4. Delivery temperature probe

5. Limit thermostat

6. Defrosting valve

7. Return temperature probe

8. Teva Probe

1 Features and technical data

12

1.4 ELECTRICAL WIRING DIAGRAM

Figure 1.7 – Wiring diagram of the appliance with low consumption fan (S1)

LEGEND
SCH1 S61 circuit board
SCH2 W10 circuit board
SCH3 Mod10 circuit board
TER Appliance power terminal block
CNTBOX Flame controller
PWRTR Board transformer
BLW Blower
PMP Hydraulic pump
IGNTR Ignition transformer
IGN Ignition electrodes
FLS Flame sensor

LS Gas valve ON indicator lamp
GV Gas solenoid valve
TC Manual fumes thermostat
TL Generator limit thermostat
FM Flowmeter
CWS Condensation water sensor
VD Defrosting valve
FAN Fan
CF Filter capacitor
FS Condensate hose heating element
THRC Hot water return temperature sensor

THMC Hot water delivery temperature sensor
TMIX Combustion air temperature sensor
TA Ambient air temperature sensor
TG Generator temperature sensor
TF Fumes temperature sensor or genera-

tor n sensor
TEVA Evaporator outlet temperature sensor
TK Condensate discharge heating element

thermostat
MA Terminal block
REED Hydraulic pump rotation sensor

1 Features and technical data

Installation, Use and Maintenance Manual – GAHP-A

13

Figure 1.8 – Wiring diagram of the appliance with standard fan

LEGEND
SCH1 S61 circuit board
SCH2 W10 circuit board
SCH3 Mod10 circuit board
TER Appliance power terminal block
CNTBOX Flame controller
PWRTR Board transformer
BLW Blower
PMP Hydraulic pump
IGNTR Ignition transformer
IGN Ignition electrodes
FLS Flame sensor
LS Gas valve ON indicator lamp

GV Gas solenoid valve
TC Manual fumes thermostat
TL Generator limit thermostat
FM Flowmeter
CWS Condensation water sensor
VD Defrosting valve
FAN Fan
C Fan condenser
(not present on silenced units)
FS Condensate hose heating element
THRC Hot water return temperature sensor
THMC Hot water delivery temperature sensor

TMIX Combustion air temperature sensor
TA Ambient air temperature sensor
TG Generator temperature sensor
TF Fumes temperature sensor or genera-

tor n sensor
TEVA Evaporator outlet temperature sensor
TK Condensate discharge heating element

thermostat
MA Terminal block
REED Hydraulic pump rotation sensor

1.5 ELECTRONIC BOARDS

Electronic boards (S61+Mod10)

The unit's electrical board contains:

▶

Electronic Board S61 (Figure 1.9 p. 14), with micropro-
cessor, it controls the appliance and displays data, messages

and operative codes. The appliance is monitored and pro­grammed by interacting with the display and knob.

▶

Auxiliary Mod10 electronic board (Figure 1.10 p. 15),
overlapping S61, it handles power modulation of the burner,
fan and water circulation pump.

▶

Satellite W10 electronic board (Figure 1.11p. 15), inter-
connected to the S61 board and located next to it, used to
control defrosting operations of the GAHP unit.

1 Features and technical data

14

Figure 1.9 – Electronic board S61

LEGEND
SCH1 Electronic board S61
SCH3 Electronic board Mod10 (see specic

picture for more details)
A1, A2 Auxiliary inputs
ENC Knob
F1 Fuse T 2A
F2 Fuse T 10A
F3 Fuse T 2A
F4 Fuse T 3,15A
FAN (BK, WH, BR) Fan output
FS5 (24V AC) Board power supply 24-0-24

Vac
IGN.BOX (L, N) Flame control unit power supply
230 Vac

J1 Jumper CAN BUS
J10 Jumper N.O. contact
J82 Board connector W10 (on Mod10)
JP10 6 pole ame control unit connector
JP12 Flue gas probe input or generator n

probe
JTAG Connector for board programming S61
MAIN 230V (L, N) Board power supply S61

230 Vac
CONTACT Normally open pump contact
P7 (R, W, Y, O) Enable input
P8 (GND, L, H) Connector CAN BUS
PUMP 230V (L, N) Oil hydraulic pump power

supply output

SPI Communication port with board

Mod10

SRT1 Oil hydraulic pump rotation sensor

input
SRT2 Hot water ow meter input
TA Ambient air temperature probe
TA1 Evaporator output probe input
TA2 Not used
TCN Combustive air temperature probe

input
TF Flue gas thermostat input

1 Features and technical data

Installation, Use and Maintenance Manual – GAHP-A

15

Figure 1.10 – Mod10 controller

Mod10 controller

Figure 1.11 – W10 electronic controller

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 circulat­ing pump at constant or variable ow;

▶

mode (2) MODULATING, i.e. at variable load from 50% to
100% of power, with circulating pump at variable ow.

LEGEND
HFLOW Not used
CFLOW Condensation water sensor control
J51 SPI connector
HPMP Primary circuit hot water pump control

output (0-10 V )

CPMP Low consumption fan control output

(0-10V)
NC1-C1 Status indication of locking warnig/error
CN5 Blower control
J82 W10 auxiliary controller connector
J83 W10 cable shielding connection W10
CN1 Inputs 0-10V (not used)

LEGEND
FS1 Defrosting valve contact
JP1 Communication with S61/Mod10

1 Features and technical data

16

For each mode, (1) o (2), specic control systems and devices are
provided (Paragraph 1.5p.13).

1.7 CONTROLS

Control device

The appliance may only work if it is connected to a control de­vice, 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 manage appliances, a single GAHP
unit, or even several Lochinvar 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:

▶

adjustment and control of one (or more) Lochinvar units of
the absorption 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 widened with auxiliary Lochinvar de­vices RB100 and RB200 (e.g. service requests, DHW production,
Third Party generator control, probe control, system valves or
circulating pumps, ...).

1.7.2 Adjustment system (2) with CCP/CCI (modulating
GAHP unit)

The CCP/CCI control is able to control up to 3 GAHP units in mod­ulating mode (therefore A/WS/GS only, excluding AR/ACF/AY),
plus any integration ON/OFF boiler. For additional details and
diagrams refer to the CCP/CCI Manual and the Design Manual.

CCP/CCI Control

See CCP/CCI device Manual.

1.7.3 Adjustment system (3) with external request (GAHP
unit ON/OFF)

The appliance may also be controlled via generic enable devic­es (e.g. thermostats, clocks, buttons, contactors...) 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
limit its possible use only to simple applications and with a sin­gle appliance.

For connection of the selected device to the appliance's
electronic board please refer to Paragraph 4.4p.27.

1.8 TECHNICAL CHARACTERISTICS

(see Table 1.1p.16).
Table 1.1 – GAHP-A HT technical data

GAHP-A HT STD GAHP-A HT S1

HEATING MODE

Seasonal space heating energy ecien­cy class (ErP)

medium-temperature application (55 °C) A+
low-temperature application (35 °C) A+

OPERATING POINT A7W50

G.U.E. gas usage eciency % 152 (1)
Thermal power kW 38,3 (1)

OPERATING POINT A7W35

G.U.E. gas usage eciency % 164 (1)
Thermal power kW 41,3 (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)

Heating capacity

Nominal (1013 mbar - 15°C) kW 25,7
true peak kW 25,2

Hot water delivery temperature

maximum for heating °C 65
maximum for DHW °C 70

Hot water inlet temperature

maximum heating °C 55
maximum for DHW °C 60
minimum temperature in continuous

operation

°C 30 (11)

Thermal dierential nominal °C 10

Hot water ow rate

nominal l/h 3000
maximum l/h 4000
minimum l/h 1400

Hot water pressure loss nominal water pressure (A7W50) bar 0,43 (2)

Ambient air temperature (dry bulb)

maximum °C 40
minimum °C -15 (7)

ELECTRICAL SPECIFICATIONS

Power supply

Voltage V 230
TYPE SINGLE PHASE
Frequency 50 Hz supply 50

1 Features and technical data

Installation, Use and Maintenance Manual – GAHP-A

17

GAHP-A HT STD GAHP-A HT S1

Electrical power absorption

nominal kW 0,84 (5) 0,77 (5)
minimum kW - 0,50 (5)

Degree of protection IP X5D

INSTALLATION DATA

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
G27 (nominal) m3/h 3,32 (12)
G27 (min) m3/h 1,62
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
NOx emission class 5
NOx emission ppm 25
CO emission ppm 36
Sound power Lw (max) dB(A) 79,6 (8) 74 (8)
Sound power Lw (min) dB(A) - 71 (8)
Sound pressure Lp at 5 metres (max) dB(A) 57,6 (10) 52 (10)
Sound pressure Lp at 5 metres (min) dB(A) - 49 (10)
Minimum storage temperature °C -30
Maximum water pressure in operation bar 4
Maximum ow ue condensate l/h 4
Water content inside the apparatus l 4

Water tting

TYPE F

thread " G 1 1/4

Gas connection

TYPE F

thread " G 3/4

Fume outlet

Diameter (∅) mm 80

Residual head Pa 80

Dimensions

width mm 848 (6)

depth mm 1258

height mm 1281 (6) 1537 (6)
Weight In operation kg 390 400
Required air ow m3/h 11000
Fan residual head Pa 40

GENERAL INFORMATION

INSTALLATION MODE B23P, B33, B53P

REFRIGERANT FLUID

AMMONIA R717 kg 7

WATER H2O kg 10
MAXIMUM PRESSURE OF THE REFRIGERANT CIRCUIT bar 32

Note:

(1) As per standard EN12309-2
(2) For ows other than nominal see Design Manual
(3) PCI (G20) 34,02 MJ/m3 (1013 mbar 15 °C).
(4) PCI (G30/G31) 46.34 MJ/kg (1013 mbar 15 °C).
(5) ± 10% according to the power supply voltage and tolerance on electrical motors consumption.
(6) Overall dimensions without ue gas exhaust ducts.
(7) A special version is available as optional feature for operation at -30 °C.
(8) Sound power values detected in compliance with the intensity measurement methodology set forth by standard EN ISO 9614.
(9) PCI (G25) 29,25 MJ/m3 (1013 mbar 15 °C).
(10) Maximum sound pressure levels in free eld, with directionality factor 2, obtained from the sound power level in compliance with standard EN ISO 9614.
(11) Under transitory conditions lower temperatures are allowed.
(12) PCI (G27) 27,89 MJ/m3 (1013 mbar 15 °C).

2 Transport and positioning

18

Table 1.2 – PED data

GAHP-A HT STD GAHP-A HT S1

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
MAXIMUM PRESSURE OF THE REFRIGERANT CIRCUIT bar g 32

FILLING RATIO

kg of

NH3/l

0,146

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
during appliance transport and installation.

On-site inspection

▶

Upon arrival at the site, ensure there is no transport
damage on packing, metal panels or nned coil.

▶

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.

2 Transport and positioning

Installation, Use and Maintenance Manual – GAHP-A

19

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 POSITIONING

Do not install inside a room

The appliance is type-approved for external installation.

▶

Do not install inside a room, not even if it has
openings.

▶

In no event start the appliance inside a room.

GAHP-A Unit ventilation

The aerothermal appliance requires a large space, venti­lated and free from obstacles, to enable smooth ow of
air to the nned coil and free air outlet above the mouth
of the fan, with no air recirculation.Incorrect ventilation
may aect eciency and cause damage to the appli­ance.The manufacturer shall not be liable for any incor­rect choices of the place and setting of installation.

Where to install the appliance

▶

The appliance may be installed at ground level, on a terrace
or on a roof, compatibly with its dimensions and weight.

▶

It must be installed outside buildings, in an area of natural air
circulation, outside the dripping path of drainpipes or simi­lar. It does not require protection from weathering.

▶

No obstruction or overhanging structure (e.g. protruding
roofs, canopies, balconies, ledges, trees) shall interfere either
with the air owing from the top of the appliance or with the
exhaust ue gas.

▶

The appliance's ue gas exhaust must not be immediately
close to openings or air intakes of buildings, and must com­ply 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.

Defrosting water drainage

In winter, it is normal for frost to form on the nned coil
and for the appliance to perform defrosting cycles.

▶

To prevent overowing and damage provide for a
drainage system.

Acoustic issues

▶

Pre-emptively assess the appliance's sound eect in connec­tion to the site, taking into account that building corners, en­closed courtyards, restricted spaces may amplify the acous­tic impact due to the reverberation phenomenon.

3 Heating engineer

20

2.4 MINIMUM CLEARANCE DISTANCES

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. 20
(bar any stricter regulations) are required for safety, operation
and maintenance.

Figure 2.2 – Clearances

2.5 MOUNTING BASE

Mounting base constructive features

▶

Place the appliance on a levelled at surface made of re-
proof material and able to withstand its weight.

(1) - installation at ground level

▶

Failing a horizontal supporting base, make a at and lev-
elled concrete base, at least 100-150 mm larger than the ap­pliance size 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
appliance and water and gas pipes.

3 HEATING ENGINEER

3.1 WARNINGS

General warnings

Read the warnings in Chapter III p. 4, providing im­portant 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

matters 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 Heating engineer

Installation, Use and Maintenance Manual – GAHP-A

21

3.2 INSTALLATION

Primary and secondary circuit

▶

In many cases it is advisable to divide the hydraulic system
into two parts, primary and secondary circuit, uncoupled 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 may work with costant or variable water ow, re­gardless of the 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 opera­tion. Very short ON/OFF cycles are to be avoided.

▶

If necessary, provide for an inertial volume, to be suitably
sized (see design manual).

3.3 HYDRAULIC CONNECTIONS

Plumbing ttings
on the right, at the bottom, connection plate (Figure 1.1p.7).

▶

A (= out) 1"1/4 F - WATER OUTPUT (m = delivery to the sys-
tem);

▶

B (= in) 1"1/4 F - WATER INPUT (r = return from the system).

Hydraulic pipes, materials and features

▶

Use pipes for heating/cooling systems, protected from
weathering, insulated for thermal dispersion.

Pipe washing

▶

Before connecting the appliance, accurately clean
the water and gas piping and any other system com­ponent, removing any residue.

Minimum components of primary plumbing circuit

▶

Always provide, near the appliance:

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 DIRT SEPARATOR FILTER

▶

1 FLOW ADJUSTMENT VALVE, if the circulating pump is con­stant ow;

▶

1 WATER CIRCULATION PUMP, towards the appliance;

on the output water piping (m)

▶

1 SAFETY VALVE (3 bar);

▶

1 EXPANSION TANK of the individual unit.

Figure 3.1 – Hydraulic plan

3.4 WATER CIRCULATION PUMP

The circulation pump (ow and head) must be selected and
installed based on pressure losses of plumbing/primary circuit
(piping + components + exchange terminals + appliance).
For the appliance's pressure losses refer to Table 1.1 p. 16 and
Design Manual.

(1) CONSTANT FLOW circulating pump

The primary circulating pump must be obligatorily controlled
by the appliance's electronic board (S61) (see Paragraph

1.5p.13).

(2) VARIABLE FLOW circulating pump

For variable ow operation, use of a Wilo Stratos Para pump is
obligatory, supplied as accessory on demand, to be connected
to the Mod10 electronic board (see Paragraph 1.5p.13). Any
other type of pump will give constant ow.
Refer to the Design Manual for the features of the Wilo Stratos
Para pump.

3.5 ANTIICING FUNCTION

Active anti-icing self-protection

The appliance is equipped with an active antifreeze self-protec­tion system to prevent icing. The anti-icing function (activated
by default) automatically starts the primary circulation pump
and, if required, the burner too, when the outside temperature
approaches zero.

Electrical and gas continuity

The active anti-icing self-protection is only eective if
the power and gas supplies are assured. Otherwise, an­ti-icing liquid might be required.

3.6 ANTIICING LIQUID

Precautions with glycol

LEGEND
1 Anti vibration joint
2 Pressure gauge
3 Flow rate adjustment valve
4 Water lter
5 Shut o valves
6 Water pump (primary circuit)
7 Safety valve (3 bar)
8 Expansion tank
9 Hydraulic separator / inertial tank with 4

ttings

10 Water pump (secondary circuit)

3 Heating engineer

22

The manufacturer disclaims any liability for any damage
caused by improper glycol use.

▶

Always check product suitability and its expiry date
with the glycol supplier. Periodically check the prod­uct's preservation state.

▶

Do not use car-grade anti-icing liquid (without inhib­itors), nor zinc-coated piping and ttings (incompat­ible with glycol).

▶

Glycol modies the physical properties of water
(density, viscosity, specic heat...). Size the piping, cir­culation pump and thermal generators accordingly.

▶

With automatic system water lling, a periodic check
of the glycol content is required.

With high glycol percentage (> 20…30%)

If the glycol percentage is ≥30% (for ethylene glycol) or
≥20% (for propylene glycol) the TAC must be alerted be­fore rst start-up.

Type of anti-icing glycol
Inhibited type glycol is recommended to prevent oxidation

phenomena.

Glycol eects

The Table 3.1 p. 22 shows, indicatively, the eects of using a
glycol depending on its %.

Table 3.1 – Technical data for lling the hydraulic circuit

GLYCOL % 10 15 20 25 30 35 40

WATER-GLYCOL MIXTURE FREEZING TEMPERATURE -3°C -5°C -8°C -12°C -15°C -20°C -25°C
PERCENTAGE OF INCREASE IN PRESSURE DROPS -- 6% 8% 10% 12% 14% 16%
LOSS OF EFFICIENCY OF UNIT -- 0,5% 1% 2% 2,5% 3% 4%

3.7 SYSTEM WATER QUALITY

Responsibility of the user/operator/installer

The installer, operator and user must assure system wa­ter quality (Table 3.2p.22). Failure to comply with the
manufacturer's guidelines may aect operation, integri­ty and life of the appliance, voiding the warranty.

Table 3.2 – Chemical and physical parameters of water

CHEMICAL AND PHYSICAL PARAMETERS OF WATER IN HEATING/COOLING
SYSTEMS

PARAMETER

UNIT OF
MEASUREMENT

ALLOWABLE RANGE

pH \ >7

(1)

Chlorides mg/l < 125

(2)

Total hardness (CaCO

3)

°f < 15
°d < 8.4

Iron mg/kg < 0.5

(3)

Copper mg/kg < 0.1

(3)

Aluminium mg/l < 1
Langelier’s index \ 0-0,4

HARMFUL SUBSTANCES

Free chlorine mg/l < 0.2

(3)

Fluorides mg/l < 1
Sulphides ABSENT

1 with aluminium or light alloys radiators, pH must also be low-

er than 8 (in compliance with applicable rules)
2 value referred to the maximum water temperature of 80 °C
3 in compliance with applicable rules

System water features

Free chlorine or water hardness may damage the appliance.
Adhere to the chemical-physical parameters in Table 3.2p.22
and the regulations on water treatment for residential and in­dustrial heating systems.

Water topping up

The chemical-physical properties of the system's water may alter
over time, resulting in poor operation or excessive topping up.

▶

Ensure there are no leaks in the installation.

▶

Periodically check the chemical-physical parameters of the
water, particularly in case of automatic topping up.

Chemical conditioning and washing

Water treatment/conditioning or system washing car­ried out carelessly may result in risks for the appliance,
the system, the environment and health.

▶

Contact specialised forms or professionals for water
treatment or system washing.

▶

Check compatibility of treatment or washing prod-
ucts with operating conditions.

▶

Do not use aggressive substances for stainless steel
or copper.

▶

Do not leave washing residues.

3.8 INSTALLATION FILLING

How to ll up the system
After completing all water, electrical and gas

connections:

1. Pressurise (at least 1.5 bar) and vent the hydraulic
circuit.

2. Let water ow (with appliance o).

3. Check and clean the lter on the inlet pipe.

4. Repeat items 1, 2 and 3. until the pressure has stabi­lised (at least 1.5 bar).

3.9 FUEL GAS SUPPLY

Gas connection

▶

3/4" F

on the right, at the bottom, connection plate (Figure 1.1p.7).

▶

Install an anti-vibration connection between the appliance
and the gas piping.

Mandatory shut-o valve

▶

Provide a gas shut-o valve (manual) on the gas supply line,
to isolate the appliance when required.

▶

Perform connection in compliance with applicable regula­tions.

3 Heating engineer

Installation, Use and Maintenance Manual – GAHP-A

23

Gas pipes sizing

The gas pipes must not cause excessive load losses and, conse­quently, insucient gas pressure for the appliance.

Supply gas pressure

The appliance's gas supply pressure, both static and dynamic,
must comply with Table 3.3p.23, with tolerance ± 15%.

Table 3.3 – Network gas pressure

Gas supply pressure

Product categories Countries of destination G20 [mbar] G25 [mbar] G30 [mbar] G31 [mbar]

G25.1

[mbar]

G27 [mbar] G2,350 [mbar]

II

2H3B/P

AL, BG, CY, CZ, DK, EE, FI, GR,
HR, IT, LT, MK, NO, RO, SE,
SI, SK, TR

20 30 30

AT, CH 20 50 50

II

2H3P

AL, BG, CZ, ES, GB, HR, IE, IT,
LT, MK, PT, SI, SK, TR

20 37

RO 20 30

II

2ELL3B/P

DE 20 20 50 50

II

2Esi3P

FR 20 25 37

II

2HS3B/P

HU 25 30 30 25

II

2E3P

LU 20 50

II

2L3B/P

NL 25 50 50

II

2E3B/P

PL

20 37 37

II

2ELwLs3B/P

20 37 37 20 13

II

2ELwLs3P

20 37 20 13

I

2E(S); I3P

BE 20 25 37

I

3P

IS 30

I

2H

LV 20

I

3B/P

MT

30 30

I

3B

30

Non compliant gas pressure (Table 3.3 p. 23) may
damage the appliance and be hazardous.

Vertical pipes and condensate

▶

Vertical gas pipes must be tted with siphon and discharge
of the condensate that may form inside the pipe.

▶

If necessary, insulate the piping.

LPG pressure reducers

With LPG the following must be installed:

▶

a rst stage pressure reducer, close to the liquid gas tank;

▶

a second stage pressure reducer, close to the appliance.

3.10 COMBUSTION PRODUCTS EXHAUST

Compliance with standards
The appliance is approved for connection to a combus-

tion products exhaust duct for the types shown in Table

1.1p.16.

Flue gas exhaust connection

▶

Ø 80 mm (with gasket),

on the left, at the top (Figure 3.2p.23).

Flue gas exhaust kit

The appliance is supplied with ue gas exhaust kit, to be tted
by the installer, including (Figure 3.2p.23):

▶

1 pipe Ø 80 mm, length 300 mm, with terminal and socket
for ue gas analysis;

▶

1 support collar;

▶

1 90° elbow Ø 80 mm;

▶

1 rain cover.

Figure 3.2 – Fume outlet











LEGEND
A Curve 90° Ø 80
B Pipe Ø 80 Lg.300 mm w/terminal
C rain cover
D Collar

How to install the ue gas kit
Figure 3.2p.23 J34:

4 Electrical installer

24

1. Remove the front panel;

2. Fasten the collar (D) with its spacer to the left side
panel of the appliance;

3. Fit the terminal/pipe assembly (B) to the elbow (A).

4. Fit the rain cover (C) onto the elbow (A);

5. Remove the protection cover;

6. Insert the elbow/terminal/pipe assembly into the
ue gas exhaust;

7. Fit the assembly closing the collar (D) and place the
rain cover;

8. Fit the front panel back on.

The cap prevents water and foreign bodies entering
the appliance before the fumes kit is installed. The cap
should thus be removed only when the kit itself has
been fully assembled and installed.

Any ue

If necessary, the appliance may be connected to a ue.

▶

To size the ue refer to Table 1.1p.16 and Design Manual.

▶

If several appliances are connected to a single ue, it is oblig­atory to install a check valve on the exhaust of each.

▶

The ue must be designed, sized, tested and constructed by
a skilled form, with materials and components complying
with the regulations in force in the country of installation.

▶

Always provide a socket for ue gas analysis, in an accessible
position.

3.11 FLUE GAS CONDENSATE DISCHARGE

The GAHP-A unit is a condensing appliance and therefore pro­duces condensation water from combustion ue gases.

Condensate acidity and exhaust regulations

The ue gas condensate contains aggressive acid sub­stances. Refer to applicable regulations in force for con­densate exhaust and disposal.

▶

If required, install an acidity neutraliser of adequate
capacity.

Do not use gutters to discharge the condensate
Do not discharge the fume condensate water in gutters,

due to the risk of materials corrosion and ice formation.

Flue gas condensate connection

The tting for ue gas condensate discharge is located on the
left side of the appliance (Figure 3.3p.24).

▶

The distance L between the sleeve and the base must not
exceed 110 mm.

▶

The corrugated condensate discharge pipe must be con­nected to a suitable discharge manifold.

▶

The junction between the pipe and the manifold must re­main visible.

Flue gas condensate discharge manifold

To make the condensate discharge manifold:

▶

Size the ducts for maximum condensation capacity (Table

1.1p.16).

▶

Use plastic materials resistant to acidity pH 3-5.

▶

Provide for min. 1% slope, i.e. 1 cm for each m of the length
(otherwise a booster pump is required).

▶

Prevent freezing.

▶

Dilute, if possible, with domestic waste water (e.g. bath-
rooms, washing machines, dish washers...), basic and neu­tralising.

Figure 3.3 – Condensate drain position

A

B

D

L

LEGEND
A Condensate discharge hose
D Corrugated hose

3.12 DEFROSTING WATER DRAINAGE

Defrosting

In winter, frost may form on the nned coil and the ap­pliance performs defrosting cycles.

Collection basin and drainage system

▶

Provide for a collection basin or containment rim and a dis-
charge system of the defrosting water, to avoid overowing,
icing and damage.

4 ELECTRICAL INSTALLER

4.1 WARNINGS

General warnings

Read the warnings in Chapter III p. 4, providing im­portant information on regulations and on safety.

Compliance with installation standards

4 Electrical installer

Installation, Use and Maintenance Manual – GAHP-A

25

Installation must comply with applicable regulations in
force, based on the installation Country and site, in mat­ters of safety, design, implementation and maintenance
of electrical systems.

Installation must also comply with the manufacturer's
provisions.

Live components

▶

After placing the appliance in the nal position, and
prior to making electrical connections, ensure not to
work on live components.

Earthing

▶

After placing the appliance in the nal position, and
prior to making electrical connections, ensure not to
work on live components.

▶

It is forbidden to use gas pipes as earthing.

Cable segregation

Keep power cables physically separate from signal ones.

Do not use the power supply switch to turn the ap­pliance on/o.

▶

Never use the external isolation switch (GS) to turn
the appliance on and o, since it may be damaged
in the long run (occasional black outs are tolerated).

▶

To turn the appliance on and o, exclusively use the
suitably provided control device (DDC, CCP/CCI or
external request).

Control of water circulation pump

The water circulation pump of the hydraulic/primary
circuit must mandatorily be controlled by the unit's
electronic boards (S61 + Mod10). It is not admissible to
start/stop the circulating pump with no enable from the
appliance.

4.2 ELECTRICAL SYSTEMS

Electrical connections must provide:

▶

(a) power supply (Paragraph 4.3p.26);

▶

(b) control system (Paragraph 1.5p.13).

How to perform connections

All electrical connections must be made in the appli­ance's Electrical Board (Figure 4.1p.26):

1. Ensure the appliance's Electrical Panel is not live.

2. Remove the front panel of the appliance and the
cover of the Electrical Board.

3. Run the cables through the suitable holes in the Con­nection Plate.

4. Run the cables through the suitable cable glands in
the Electrical Board.

5. Identify the appropriate connection terminals.

6. Perform the connections.

7. Close the Electrical Panel.and t the front panel back
on.

4 Electrical installer

26

Figure 4.1 – Electrical Panel GAHP-A











 









4.3 ELECTRICAL POWER SUPPLY

Power supply line

Provide (by the installer) a protected single phase line (230 V 1-N
50 Hz) with:

▶

1 three-core cable type FG7(O)R 3Gx1,5;

▶

1 two-pole switch with two 5A type T fuses, (GS) or one 10A
magnetothermic breaker.

The switches must also provide disconnector capability,
with min contact opening 4 mm.

How to connect the power supply

To connect the three-pole power supply cable (Figure

4.2p.26):

1. Access the Electrical Board of the appliance accord­ing to the Procedure 4.2p.25.

2. Connect the three lead-in wires to the terminal (TER)
in the electrical panel on the machine.

3. Provide the earth lead-in wire longer than live ones
(last to be torn in the event of accidental pulling).

Figure 4.2 – Electrical wiring diagram

Example of connection of appliance to 230 V 1 N - 50 Hz electricity
supply

LEGEND
A CAN-BUS cable gland
B signal cable gland 0...10 V pump Wilo

Stratos Para
C electronic boards S61+Mod10+W10
D terminal boxes
E transformer 230/23 V AC
F ame control unit
G circulation pump power supply and

control cable gland
H GAHP power supply cable gland

Terminals:
TER terminal box
L-(PE)-N phase/earth/neutral GAHP power supply
MA terminal box
N-(PE)-L neutral/earth/phase circulation pump

power supply
3-4 circulation pump enable

LEGEND
TER terminal

board
L phase
N neutral
Components NOT
SUPPLIED
GS general

switch

4 Electrical installer

Installation, Use and Maintenance Manual – GAHP-A

27

4.4 SETUP AND CONTROL

Control systems, options (1) (2) (3)

Three separate adjustment systems are provided, each with
specic features, components and diagrams (see 4.4 p. 29,

4.5p.30):

▶

System (1), with DDC control (with CAN-BUS connection).

▶

System (2), with CCP/CCI control (with CAN-BUS connec­tion).

▶

System (3), with an external request.

CAN-BUS communication network

The CAN-BUS communication network, implemented with
the cable of the same name, makes it possible to connect and

remotely control one or more Lochinvar appliances with the
DDC or CCP/CCI control devices.
It entails a certain number of serial nodes, distinguished in:

▶

intermediate nodes, in variable number;

▶

terminal nodes, always and only two (beginning and end);

Each component of the Lochinvar system, appliance (GAHP, GA,
AY, ...) or control device (DDC, RB100, RB200, CCI, ...), corresponds
to a node, connected to two more elements (if it is an interme­diate node) or to just one other element (if it is a terminal node)
through two/one CAN-BUS cable section/s, forming an open lin­ear communication network (never star or loop-shaped).

CAN-BUS signal cable

The DDC or CCP/CCI controllers are connected to the appliance
through the CAN-BUS signal cable, shielded, compliant to Table

4.1p.27 (admissible types and maximum distances).

Table 4.1 – CAN BUS cables type

CABLE NAME SIGNAL / COLOR MAX LENGTH Note
Robur

Ordering Code OCVO008

ROBUR NETBUS H= BLACK L= WHITE GND= BROWN 450 m

Honeywell SDS 1620

In all cases the fourth conductor should not be used

BELDEN 3086A

H= BLACK L= WHITE GND= BROWN 450 m

TURCK type 530

DeviceNet Mid Cable

TURCK type 5711 H= BLUE L= WHITE GND= BLACK 450 m

Honeywell SDS 2022

TURCK type 531 H= BLACK L= WHITE GND= BROWN 200 m

For lengths ≤200 m and max 4 nodes (e.g. 1 DDC + 3 GAHP), a
simple 3x0.75 mm shielded cable may even be used.

How to connect the CAN BUS cable to the appliance

To connect the CAN-BUS cable to the S61 electronic
board (Paragraph 1.5 p. 13), located in the Electrical
Panel inside the unit, (Figure 4.3p.28 and 4.4p.29):

1. Access the Electrical Board of the appliance accord­ing to the Procedure 4.2p.25);

2. Connect the CAN-BUS cable to terminals GND, L and
H (shielding/earthing + two signal conductors);

3. Place the CLOSED J10 Jumpers (Detail A) if the node
is terminal (one connected CAN-BUS cable section
only), or OPEN (Detail B) if the node is intermediate
(two connected CAN-BUS cable sections);

4. Connect the DDC or the CCP/CCI to the CAN-BUS
cable according to the instructions in the following
Paragraphs and the DDC or CCP/CCI Manuals.

4 Electrical installer

28

Figure 4.3 – Electrical wiring diagram

LEGEND
SCH electronic board
GND Common data
L Data signal LOW
H Data signal HIGH
J1 Jumper CAN-BUS in board
A Detail case "terminal node" (3 wires; J1=jumper "closed")
B Detail case "intermediate node" (6 wires; J1=jumper "open")
P8 Port can/connector

Connection cable CAN BUS to electronic board: detail A case "terminal node", detail B case "intermediate node"

GAHP Conguration (S61) + DDC or CCP/CCI

(Systems (1) and (2) see also Paragraph 1.7p.16)

4 Electrical installer

Installation, Use and Maintenance Manual – GAHP-A

29

Figure 4.4 – Connexion câble CAN BUS for plants with one unit

LEGEND
DDC direct digital control
SCH electronic board S61
J1 Jumper CAN-BUS in board S61
J21 Jumper CAN-BUS in board DDC
A terminal nodes connection - (3 wires; J1 e J21 = "closed")
H,L,GND data signal wires (rif. cables table)

Connexion câble CAN BUS between one DDC and one unit

External request

(System (3) see also Paragraph 1.7p.16)
It is required to arrange:

▶

request device (e.g. thermostat, clock, button, ...) tted with
a voltage-free NO contact.

How to connect the external request

Connection of external request is eected on the S61
board located in the Electrical Panel inside the unit (Fig­ure 4.5p.30):

1. Access the Electrical Board of the appliance accord­ing to the Procedure 4.2p.25.

2. connect the voltage free contact of the external de­vice, through two conductor wires, to terminals R
and W (respectively: common 24 V AC and heating
enable) of electronic board S61 (Detail CS)

4 Electrical installer

30

Figure 4.5 – Wiring diagram, external enable connection

LEGEND
SCH Electronic board
R Common
W Heating enable terminal
Components NOT SUPPLIED
CS external enable

Electrical connection to external operation enable

4.5 WATER CIRCULATION PUMP

4.5.1 Option (1) CONSTANT FLOW circulating pump

It must be mandatorily controlled from the S61 electronic board.
The diagram in Figure 4.6 p. 31 is for pumps < 700 W. For
pumps > 700 W it is required to add a control relay and arrange
Jumper J10 OPEN.

How to connect the CONSTANT FLOW circulating
pump

Access the Electrical Board of the appliance according
to the Procedure 4.2p.25

1. connect board S61, to terminals 3-4 of terminal
board (MA);

2. Jumper J10 CLOSED.

4 Electrical installer

Installation, Use and Maintenance Manual – GAHP-A

31

Figure 4.6 – Electrical wiring diagram

Example of pump/appliance electrical connection with 230 Vac pump (with absorbed power of < 700 W), controlled directly by the appliance.

4.5.2 Option (2) VARIABLE FLOW circulating pump

It must be mandatorily controlled from the Mod10 electronic
board (built into the S61).

How to connect the VARIABLE FLOW circulating
pump

The Wilo Stratos Para pump is already standard supplied
with the power supply cable and signal cable, both

1.5m long.
For longer distances, use respectively cable FG7 3Gx-

1.5mm² m and shielded cable 2x0.75 mm² suitable for
0-10V signal.

To connect the Wilo Stratos Para pump (Figure

4.7p.32 J 45 or 4.8p.33 J 46)

1. Connect the brown wire of the pump to terminal "-"
HPMP of the Mod10 board, and the white wire of the
pump to terminal "+" HPMP of the Mod10 board.

2. Isolate the black wire and the blue one.

3. Protect the pump's supply line with a double
pole switch with 2 A delayed fuse (Detail IP, Figure

4.7 p. 32 J 45), or connect it directly to the termi­nals inside the appliance's Electrical Board (Detail
MA, Figure 4.8p.33 J 46).

LEGEND
SCH circuit board
J10 closed jumper
N.O. CONTACT N.O voltage free contacts
MA unit terminal block
L phase
N neutral
Components NOT SUPPLIED
PM water pump <700W

4 Electrical installer

32

Figure 4.7 – Wiring diagram for connection of Wilo variable rate pumps

LEGEND
IP Bipolar pump power switch
F Fuse
PM Hot water circulation pump (primary circuit)

Pump signal 0-10V wire colours
brown connect to -ve
white connect to +ve
black isolate
blue isolate

Wiring diagram for connection of Wilo variable rate pumps

5 First start-up

Installation, Use and Maintenance Manual – GAHP-A

33

Figure 4.8 – Wiring diagram for hooking up the Wilo variable rate pump powered by the unit

Wiring diagram for hooking up the Wilo variable rate pump powered by the unit

5 FIRST STARTUP

The First Startup entails checking/setting up combus­tion parameters and may exclusively be carried out by
a TACLochinvar The user/installer is NOT authorised to
perform these operations, under pain of invalidating
the warranty.

5.1 PRELIMINARY CHECKS

Preliminary checks for First start-up

Upon completing installation, before contacting the TAC the in­staller must check:

▶

water-heating, electrical and gas systems suitable for the re­quired capacities and equipped with all safety and control
devices required by the regulations in force;

▶

absence of leaks in the water and gas systems;

▶

type of gas for which the appliance is designed (methane
or LPG);

▶

supply gas pressure complying with the values of Table

3.3p.23, with max tolerance ±15%;

▶

Power supply mains complying with the appliance's rating
plate data;

▶

appliance correctly installed, according to the manufactur­er's instructions;

LEGEND
PM Hot water circulation pump (primary

circuit)

MA Unit terminal block

Pump signal 0-10V wire colours
brown connect to -ve
white connect to +ve
black isolate
blue isolate

6 Normal operation

34

▶

system installed in a workmanlike manner, according to na­tional and local regulations.

Abnormal or hazardous installation situations

Should any abnormal or hazardous installation situations be
found, the TAC shall not perform First start-up and the appliance
shall not be commissioned.
These situations may be:

▶

appliance installed inside a room;

▶

failed compliance with minimum clearances;

▶

insucient distance from combustible or ammable mate­rials;

▶

conditions that do not warrant access and maintenance in
safety;

▶

appliance switched on/o with the main switch, instead of
the control device provided (DDC, CCP/CCI or external re­quest);

▶

appliance defects or faults caused during transport or instal­lation;

▶

gas smell;

▶

non-compliant mains gas pressure;

non-compliant ue gas exhaust;

▶

all situations that may involve operation abnormalities or are
potentially hazardous.

Non-compliant system and corrective actions

Should the TAC nd any non conformities, the user/installer is
bound to perform any corrective procedures required by the
TAC .
After performing the remedial actions (the installer's responsi­bility), if the TAC deems that safety and conformity conditions
are in place, "First start-up" may be eected.

6 NORMAL OPERATION

This section is for the end user.

6.1 WARNINGS

General warnings

Prior to using the appliance carefully read the warnings
in Chapter III p. 4, providing important information
on regulations and on safety.

First start-up by TAC

First start-up may exclusively be carried out by a Lochin­var TAC (Chapter 5p.33).

Never power the appliance o while it is running

NEVER power the appliance o while it is running (ex­cept in the event of danger, Chapter III p. 4), since
the appliance or system might be damaged.

6.2 SWITCH ON AND OFF

Routine switching on/o

The appliance may exclusively be switched on/o by
means of the suitably provided control device (DDC,
CCP/CCI or external requests).

Do not Switch On/O with the power supply switch

Do not switch the appliance on/o with the power sup­ply switch. This may be harmful and dangerous for the
appliance and for the system.

Inspections before switching on

Before switching on the appliance, ensue that:

▶

gas cock open;

▶

appliance electrical power supply (main switch (GS)
ON);

▶

DDC or CCP/CCI power supply (if present);

▶

water circuit ready.

How to switch on/o

▶

If the appliance is controlled by a DDC or by a CCP/CCI (sys­tems (1) and (2) see Paragraph 1.7p. 16), refer to the re­spective manuals.

▶

If the appliance is controlled by external request (e.g. ther­mostat, clock, button, ... with voltage-free NO contact), (sys­tem (3) see Paragraph 1.7p.16), the appliance is switched
on/o by the ON/OFF positions of the external control de­vice.

After switching on with the control, in normal operating condi­tions, the appliance starts/stops automatically according to the
user's thermal needs, supplying hot water at the programmed
temperature.

Although the external request is in the "ON" position,
this does not mean the appliance will start immediate­ly, but it will only start when there are actual service
demands.

6.3 MESSAGES ON THE DISPLAY

4 digit display

The S61 board of the appliance (Paragraph 1.5p. 13, Figure

6.1 p. 35) is tted with a 4-digit display, visible through the
sight glass of the front panel.

▶

When the appliance is powered on, all the LEDs switch on for
3 sec, then the S61 board name is displayed.

▶

After another 15 sec, the appliance is ready to operate.

Signals in normal operation

▶

During normal operation, water temperature values alter­nate on the display: output,input and the dierence be­tween the two.

Signals in the event of fault

In the event of fault the display blinks indicating an operational
code (rst letter on the display: "E" = error, or "U" = warning)

▶

If it is only a temporary warning, the appliance may continue
working.

▶

If it is a permanent error or warning the appliance stops

6 Normal operation

Installation, Use and Maintenance Manual – GAHP-A

35

(Table 8.1p.38).

6.4 ELECTRONIC ADJUSTMENT ON THE
MACHINE  MENUS AND PARAMETERS OF THE
S61 BOARD

Firmware

The instructions on the use of the S61 electronic board
concern the rmware version 3.028.

The appliance's electronic board (S61)

Figure 6.1 – GAHP unit electronic board



















S61 + Mod10

Display

The 4-digit display of the S61 board (Detail A Figure 6.1p.35)
is as follows:

▶

the rst digit on the left, green) indicates the menu number
(e.g. "0.", "1.", "2.", ... "8.");

▶

the last three digits (on the right, red) indicate a code or a
value for a parameter, among those included in the selected

menu (e.g. "__6" "_20", "161").

(e.g. menu+parameter "1.__6", "2._20", "3.161").

Knob

One of the following actions may be done with the S61 board
knob (Detail B in Figure 6.1p.35):

▶

Enter the menu list (by pressing the rst time);

▶

Scroll the menu list, or a series of parameters in a menu (by
turning);

▶

Select a menu or a parameter (by pressing);

▶

Modify and conrm the setting of a parameter (turning and
pressing);

▶

Execute a command (by pressing);

▶

Exit a menu and go back to the higher level by selecting the
letter “E” which is displayed at the end of the menu list or of
a series of parameters in a menu.

The letter "E" is displayed at the end of the menu list or of a series
of parameters in a menu, and indicates the exit to go back to the
higher level by pressing the knob.

Menus and Parameters

The menus may be display only (functional data or parameters),
display and setting (parameters) or control (reset)
Menu for the user (but for the installer and TAC as well)

▶

the menu "0.", display only, for functional data detected in
real time;

▶

the menu "1.", display only, for current values of appliance
parameters;

▶

menu "2.", control, to execute ame control unit reset opera­tions, reset errors (Paragraph 6.6p.36);

▶

menu "3.", display and setting, to set the value of some sys­tem parameters (e.g. water set point temperature); the val­ues are initialised by the TAC at First Switch-On.

It is accessed without password.
Menu for the installer or TAC (not accessible to the user)

▶

Menu "4.", "5." and "6." are password-protected. These are
specic sections, exclusively intended for skilled personnel
(installer or TAC). For information see the technical Assistant
Manual.

▶

Menu "7." is display only and intended for the manufacturer.

▶

Menu "8." is empty, it may be selected but not used.

Special key for the knob

▶

To access the menus and parameters of the S61
board, use the special standard supplied key, fas­tened on the gas pipe above the Electrical Panel.
The key allows the knob to be operated through the

LEGEND
A 4 digit display
B Knob
C CAN port
D Mod10 controller

6 Normal operation

36

suitable hole in the Electrical Panel cover, operating
safely away from live components.

▶

Always keep the key for future uses.

How to access the Menus and Parameters

Before Starting:
(1) Power supply switch "ON";
(2) Display of the S61 board showing in sequence the

detected water temperature data (if the appliance is in
normal operation), or the ashing malfunction and fail­ure codes (if the appliance is in failure).

To access the menus and parameters of the S61 board,
proceed as follows (see also Figure 6.1p.35):

1. Remove the front panel by removing the xing
screws.

2. Remove the cover of the electrical board to access
the S61 board knob.

3. Act on the knob by means of the special key through
the suitable hole.

4. Press the knob once to display the menus: the rst
menu is displayed, "0." (= menu 0).

5. Turn the knob clockwise to scroll down and display
the other/subsequent menus; the menu numbers
will be displayed in order, "1.", "2.", ... , "6." ... or "E" (=
exit).

6. Select the menu of interest (e.g. display "2.___" =
menu 2) by pressing the knob; the rst parameter
code will be displayed, in menu order (e.g. display
"2._20" = parameter 20 in menu 2).

7. Turn the knob clockwise to scroll down the other pa­rameters in the menu; the codes will be displayed in
order (e.g. display "2._20", "2._21", ... "2._25" = param­eters 20, 21, ... 25 in menu 2), or letter "E" (= exit) at
the end of the list. "

8. Select the parameter of interest (e.g. with code 161
in menu 3) by pressing the knob; the gure previous­ly assigned to the parameter will be displayed, read
only or to be set (e.g. the gure "45" for parameter
161 in menu 3 = water temperature set-point at 45
°C); if instead of a gure/setting it is a command, a
ashing code is displayed (e.g. "reS1" for the ame
block reset command).

9. Press the knob to reconrm the gure; or rotate the
knob to modify the gure, and press at the end to
conrm or set the new gure; if however, it is a mat­ter of controlling an appliance operation, press the
knob to execute it.

10. To exit a parameter menu or the menu list and go
back to the higher level, turn the knob to display the
letter "E" for exit, then press the knob again.

11. Place the cover back on the electrical panel opening
and t the appliance's front panel back on.

6.5 MODIFYING SETTINGS

Modify the settings through the DDC or CCP/CCI

If the appliance is connected to the DDC or to the CCP/
CCI control, refer to the relevant manual to modify
settings.

How to raise/lower the water temperature set-point

The water temperature set-point establishes the delivery tem­perature to the system (water output from the appliance), or
return from the system (water input in the appliance). The tem­perature is pre-set by the TAC upon First Switch-On.

If the appliance is not connected to a DDC or CCP/CCI
control, to raise/lower the water temperature set-point
with the S61 board, proceed as follows:

1. Access menu 3 under parameter 161 (= water tem­perature set-point) by rotating and pressing the
knob; "3.161" must be displayed (procedure Para­graph 6.4p.35);

2. Display the parameter value by pressing the knob;
the previously set value is displayed (from 10 to 65
°C); to reconrm the pre-existing value press the
knob again, otherwise go to point 3.

3. Turn the knob to modify the value, increasing or de­creasing it, and press it to set the new value;

4. Exit menu 3, and from the menu list, by selecting and
pressing letter "E" twice, and go back to the normal
display of detected temperature data.

Do not modify complex settings

Specic technical and system knowledge is required for
complex settings. Contact a TAC.

6.6 RESTARTING A LOCKEDOUT UNIT  RESET

Fault signals on the display

In the event of locked-down appliance, an operational code
ashes on the display (rst green gure on the left, letter "U" =
warning or "E" = error).

▶

To restart the appliance you must know and perform the
procedure concerning the issue signalled and identied by
the code (Paragraph 8.1p.38).

▶

Only act if you are familiar with the issue and with the pro­cedure (technical expertise and professional qualications
might be required).

▶

If you do not know the code, the problem, or the procedure,
or you do not have sucient skills, and in any case of doubt,
contact the TAC.

Locked-down appliance

An external intervention (reset or repair) is required due to an
appliance fault or problem with the system.

▶

A reset may be enough for a temporary and provisional
anomaly.

▶

For a fault or breakdown, alert the maintenance technician
or TAC.

Reset

There are two options for resetting a fault:
(1) If the appliance is connected to a DDC or to a CCP/CCI you
may act through the control device, as described in the relevant
manual.
(2) You may act directly from the S61 board as described below
(if the appliance is controlled with external request, this is the
only option).

How to perform reset from the S61 board

7 Maintenance

Installation, Use and Maintenance Manual – GAHP-A

37

To perform the reset directly from the S61 board:

1. Access Menu 2 under Parameter "_20", to reset ame
block (Error E412), or Parameter "_21", for any oth­er generic reset, turning and pressing the knob;
"2._20"/"2._21" must be displayed (procedure Para­graph 6.4p.35);

2. Press the knob to display the ashing reset request
(e.g. "reS1" to reset ame block).

3. Press the knob again (the second time) to perform
the reset; the reset request stops ashing, then "2._
XX" is displayed again (e.g. "2._20"). The reset opera­tion has been performed.

4. Exit menu 2 and the menu list, by selecting and
pressing letter "E" twice, and go back to the normal
display of detected temperature data.

6.7 EFFICIENCY

For increased appliance eciency:

▶

Keep the nned coil clean;

▶

Adjust the maximum water temperature to the actual sys­tem requirements;

▶

Reduce repeated switch-ons to the minimum (low loads);

▶

Program appliance activation for actual periods of use;

▶

Keep water and air lters on plumbing and ventilation sys­tems clean.

7 MAINTENANCE

7.1 WARNINGS

Correct maintenance prevents problems, assures e­ciency and keeps running costs low.

Maintenance operations described herein may exclu­sively be performed by the TAC or skilled maintenance
technician.

Any operation on internal components may exclusively
be performed by the TAC.

Before performing any operation, switch o the appli­ance by means of the control device (DDC, CCP/CCI or
external request) and wait for the end of the switching
o cycle, then disconnect power and gas supply, by act­ing on the electrical disconnecter and gas cock.

The eciency checks and every other "check and
maintenance operation" (see Tables 7.1 p. 37 and

7.2 p. 38) must be performed with a frequency ac-

cording to current regulations or, if more restrictive, ac­cording to the provisions set forth by the manufacturer,
installer or TAC.

Responsibility for eciency checks, to be carried out for
the aims of restricting energy consumption, lies with
the system manager.

Heavy-duty use

If the unit is subject to heavy duty use (for example
in process plants or in other conditions of continuous
operation), maintenance operations must be more
frequent.

7.2 PREEMPTIVE MAINTENANCE

▶

For pre-emptive maintenance, comply with the recommen­dations in Table 7.1p.37.

Table 7.1

GUIDELINES FOR THE PREVENTIVE MAINTENANCE OPERATIONS
Check of the unit GAHP-A GAHP-GS/WS AY ACF GAHP-AR

Visually check of the general condition of the unit and of its air heat exchanger (1) √ √ √
Check the correct operation of the device used for monitoring the water ow √ √ √ √ √
Check the % value of CO2 √ √ √
check gas pressure to the burners √ √
Check that the condensate discharge is clean

[If necessary, frequency of the maintenace operation must be increased]

√ √ √

Replace the belts after 6 years or 12,000 hours of operation √ √ √ √
Check/restore the pressure of the primary hydronic circuit √
Check/restore the air pressure inside of the expansion vessel of the primary hydronic circuit √

Check for every DDC or CCI DDC or CCI

Check that the plant is able to achive the setpoint temperature √
Download the hystorical events √

1 - It is suggested the cleaning of the air heat exchanger once every 4 years [the optimal frequency of this operation is in any case a consequence of
the installation site].

8 Diagnostics

38

7.3 SCHEDULED ROUTINE MAINTENANCE

▶

For scheduled routine maintenance, perform the operations
in Table 7.2p.38, at least once every 2 years.

Table 7.2

SCHEDULED MAINTENANCE OPERATIONS TO BE PERFORMED AT LEAST ONE EVERY TWO YEARS
Check of the unit GAHP-A GAHP-GS/WS AY ACF GAHP-AR

Clean the combustion chamber √* √* √ √ √*
Clean the burner √* √* √ √ √*
Clean the electrodes of ignition and ame sensing √ √ √ √ √

Check that the condensate discharge is clean √ √ √
Replace the silicone gasket between the front plate and the exchanger √

*Only in case the analysis of combustion products is non-compliant

7.4 PERIODS OF INACTIVITY

Avoid emptying the water system

Emptying the system may cause damage due to corro­sion of the water pipes.

Deactivate the system in winter

Should you intend to stop the appliance in the winter
season, ensure at least one of the following conditions:

1. anti-icing function active (Paragraph 3.5p.21);

2. sucient anti-icing glycol (Paragraph 3.6p.21).

Prolonged periods of inactivity

▶

Should you foresee to leave the appliance inactive for a long
period of time, disconnect it from the electrical and gas
mains. These operations must be performed by Qualied
Personnel.

How to deactivate the appliance for long periods of
time

1. Switch the appliance o (6.2p.34).

2. Only when the appliance is completely o, power it
o with the main switch/disconnector switch (Detail
GS in Figure 4.2p.26).

3. Close the gas valve

4. If necessary, add water with glycol (if the appliance
is disconnected from the power and gas mains, the
active anti-icing protection is missing, Paragraph

3.5p.21).

How to reactivate the appliance after long periods
of inactivity

Before reactivating the appliance, the operator/mainte­nance technician of the system must rst of all:

▶

Check whether any maintenance operations are re­quired (contact the TAC; see Paragraphs 7.2 p. 37
and 7.3p.38).

▶

Check content and quality of the water in the system,
and if necessary top it up (Paragraphs 3.8 p. 22,

3.7p.22 and 3.6p.21 ).

▶

Ensure the ue gas exhaust duct is not obstructed,
and that the condensate drain is clean.

After completing the above checks:

1. Open the gas cock and ensure there are no leaks;
should gas smell be noticed, close the gas cock
again, do not switch any electrical devices on and
request intervention by Skilled Personnel.

2. Power on with the main power supply switch (GS,
Figure 4.2p.26).

3. Switch on the appliance by means of the provided
control device (DDC, CCP/CCI or external request,
Paragraph 4.4p.27).

8 DIAGNOSTICS

8.1 OPERATIVE CODES

Table 8.1 – Operative Codes

CODES DESCRIPTION Warning (u) Error (E)

400

FAULT ON RESET CIRCUIT OF FLAME
CONTROL UNIT

NA

Power cycle the appliance.
If the code persists, shows up again or in case of doubt, contact
the TAC.

401

GENERATOR LIMIT THERMOSTAT
TRIP

Contact authorised Technical Assistance
402 FLUE GAS THERMOSTAT TRIP Contact authorised Technical Assistance
405

AMBIENT TEMPERATURE EXCEED­ING OPERATIVE LIMITS

NA Reset is automatic when the triggering condition ceases.

406

AMBIENT TEMPERATURE LOWER
THAN OPERATIVE LIMITS

Non-blocking Warning (informative code).

The code is reset automatically when the trigger-

ing condition ceases.

NA

8 Diagnostics

Installation, Use and Maintenance Manual – GAHP-A

39

CODES DESCRIPTION Warning (u) Error (E)

407 GENERATOR TEMPERATURE HIGH

Reset is automatic when the triggering condition
ceases.

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

408 FLAME CONTROL UNIT ERROR NA Contact authorised Technical Assistance

410 INSUFFICIENT WATER FLOW

Reset is automatic when the triggering condition
ceases.

Check and clean water lters on the system.
Check for air in the system.
Check water ow pump.
Power cycle the appliance.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

411

INSUFFICIENT ROTATION OF OIL
PUMP

Reset occurs automatically 20 minutes after the
code is generated.

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

412 FLAME CONTROLLER UNIT ARREST

Reset is automatic up to 4 attempts (in about 5
minutes).

Gas supply check.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 20).
If the code persists or in case of doubt, contact the TAC.

416

FAULTY HOT OUTLET WATER TEM­PERATURE PROBE

NA

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

417

FAULTY HOT OUTLET WATER
INLET TEMPERATURE PROBE

NA

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

420

FAULTY GENERATOR TEMPERATURE
PROBE

NA

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

422 FAULTY WATER FLOWMETER NA

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

423

FAULTY AIR/GAS MIXTURE TEMPER­ATURE PROBE

NA

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

424

FUMES TEMPERATURE SENSOR
FAU LT

Reset is automatic when the triggering condition
ceases.

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

425

CONDENSATE DISCHARGE
CLOGGED

NA

Check and clean condensate discharge.
Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

426

GENERATOR FIN TEMPERATURE
SENSOR MALFUNCTION

Reset is automatic when the triggering condition
ceases.

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

428

GAS SOLENOID VALVE EXCITED
DURING FLAME CONTROLLER
ARREST

NA

Power o the appliance.
Contact authorised Technical Assistance.

429

GAS SOLENOID VALVE WITHOUT
ELECTRICAL POWER

Reset occurs automatically if the gas solenoid
valve switches on again within 10 minutes (with
central ame control unit on).

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

430 GENERATOR FINS TEMPERATURE

HIGH

Reset is automatic when the triggering condition
ceases.

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

431

WATER TEMPERATURE EXCEEDING
OPERATIVE LIMITS

Check conguration of other heat generators on
the system.
Check water ow.
Check system thermal load.
Reset is automatic when the triggering condition
ceases.

NA

434 POSSIBLE SOURCE ANOMALY Check if the fan is rotating freely. Contact the TAC. NA

436 BLOWER FAULT

Reset occurs automatically 20 minutes after the
code is generated.

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

437

LOW AIR-GAS MIXTURE
TEMPERATURE

NA Reset is automatic when the triggering condition ceases.

444

FAULTY EVAPORATOR TEMPERA­TURE PROBE

NA

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

8 Diagnostics

40

CODES DESCRIPTION Warning (u) Error (E)

446

HIGH HOT INLET WATER
TEMPERATURE

Check conguration of other heat generators on

the system.

Reset is automatic and occurs if the generating

condition ceases with circulating pump on or 20

minutes after the code is generated with circulat-

ing pump o.

NA

447

HOT INLET WATER TEMPERATURE
LOWER THAN OPERATIVE LIMITS

Reset occurs automatically when the generating

cause resolves or 430 seconds after the code is

generated.

Reset occurs automatically when the condition that generated the
code ceases.
If the code shows up again or in case of doubt contact the TAC.

448

HIGH HOT WATER DIFFERENTIAL
TEMPERATURE

Check water ow.

Reset occurs automatically 20 minutes after the

code is generated.

Reset occurs automatically when the condition that generated the
code ceases.
If the code shows up again or in case of doubt contact the TAC.

449 SATELLITE BOARD NOT PRESENT NA Contact authorised Technical Assistance.

452 DEFROSTING FUNCTION ACTIVATED

Non-blocking Warning (informative code).

The code clears automatically when execution of

defrosting ends.

NA

453

WATER FLOW IN THE PASSIVE HOT
MODULE

Reset is automatic when the triggering condition

ceases.

NA

478

HIGH HOT OUTLET WATER
TEMPERATURE

Reset is automatic when the triggering condition

ceases.

NA

479 DEFROST FUNCTION ACTIVATED

Non-blocking Warning (informative code).

The code clears automatically when anti-icing

function execution ends.

NA

80/480

INCOMPLETE OR INVALID
PARAMETERS

Contact authorised Technical Assistance.

481 INVALID P0 PARAMETERS

Reset is automatic when the triggering condition

ceases.

Contact authorised Technical Assistance.

482 INVALID P1 PARAMETERS

Reset is automatic when the triggering condition

ceases.

Contact authorised Technical Assistance.

484

FAULTY TRANSFORMER CONNEC­TION OR 24 V AC FUSES

NA Contact authorised Technical Assistance.
485 INCORRECT MODULE TYPES NA Contact authorised Technical Assistance.

486 FAULTY BOARD, ROM NA Contact authorised Technical Assistance.
487 FAULTY BOARD, pRAM NA Contact authorised Technical Assistance.
488 FAULTY BOARD, xRAM NA Contact authorised Technical Assistance.
489 FAULTY BOARD, REG. NA Contact authorised Technical Assistance.

490

FAULTY AMBIENT TEMPERATURE
PROBE

NA

Reset may be performed from the DDC/CCI or from the S61 board
(menu 2, parameter 21).
If the code persists, shows up again or in case of doubt, contact
the TAC.

491 CONTROLLER DEFECTIVE NA Contact authorised Technical Assistance.

NA: Not Applicable

Appendices

Installation, Use and Maintenance Manual – GAHP-A

41

APPENDICES

1 DECLARATION OF CONFORMITY

Figure 1

coscienza ecologica caring for the environment

Robur S.p.A. tecnologie avanzate per la climatizzazione advanced heating and cooling technologies www.robur.it [e-mail]
via Parigi 4/6 24040 Verdellino/Zingonia (BG) Italy T [phone] F [phone] capitale sociale € 2.028.000,00 i.v. iscritta al Registro
Imprese di Bergamo n. 154968 codice fiscale/partita iva 00373210160 V.A.T. code IT 00373210160 società soggetta all’attività di direzione e
coordinamento di Fin Robur S.a.p.A. di Benito Guerra & C.

EC – DECLARATION OF CONFORMITY

Manufacturer : Robur S.p.A.
Address : Via Parigi 4/6
City, Country : Verdellino/Zingonia 24040 (Bg), Italy

This is to declare that the ROBUR Gas Absortion Heat Pump (GAHP) are in conformity with the following EC­Directives:

2006/42/EC

Machinery Directive with subsequent amendments and integrations.

2004/108/EC Electromagnetic Compatibility with subsequent amendments and integrations.

Tested and examined according to the following norms: EN55014-1, EN55014-2, EN61000-3-2, EN61000-3-3,
EN62233.

2006/95/EC Low Voltage Directive with subsequent amendments and integrations.
Tested and examined according to the following norms: EN50165, EN60335-2-102, EN60335-1.

2009/142/EC Gas Appliance Directive with subsequent amendments and integrations.
Tested and examined according to the following norms: EN 12309-1. EN 12309-2, EN 483.
As proved whit EC certification number 0964, issued by KIWA Italia S.p.A Via G. Carducci,5 Milan-Italy

97/23/EC Pressure Equipment Directive with subsequent amendments and integrations.
As proved with EC Certification number 1370 of all the components under pressure of the III° category,
issued by BUREAU VERITAS Italia S.p.A. Via Miramare, 15 Milan-Italy

Jvan Benzoni
R&D Director

Robur S.p.A.

Appendices

42

2 PRODUCT FICHE

Figure 2

Model(s): GAHP-A STD
Air-to-water heat pump: yes
Water-to-water heat pump: no
Brine-to-water heat pump: no
Low-temperature heat pump: no
Equipped with a supplementary heater: no
Heat pump combination heater: no

Item Symbol Value Unit Item Symbol Value Unit

Rated heat output (*)

Prated 29,6 kW

Seasonal space heating

energy efficiency

η

s

111 %

T

j

= -7 °C Pdh 26,1 kW Tj = -7 °C PERd 96 %

T

j

= +2 °C Pdh 16,0 kW Tj = +2 °C PERd 120 %

T

j

= +7 °C Pdh 10,4 kW Tj = +7 °C PERd 117 %

T

j

= +12 °C Pdh 4,4 kW Tj = +12 °C PERd 111 %

T

j

= bivalent temperature Pdh - kW Tj = bivalent temperature PERd

-%

Annual energy consumption Q

HE

198

GJ

Rated heat output (*)

Prated 29,4 kW

Seasonal space heating

energy efficiency

η

s

107 %

T

j

= -7 °C Pdh 17,9 kW Tj = -7 °C PERd 109 %

T

j

= +2 °C Pdh 10,9 kW Tj = +2 °C PERd 117 %

T

j

= +7 °C Pdh 7,1 kW Tj = +7 °C PERd 112 %

T

j

= +12 °C Pdh 3,2 kW Tj = +12 °C PERd 111 %

T

j

= bivalent temperature Pdh - kW Tj = bivalent temperature PERd

-%

T

j

= operation limit

temperature

Pdh 29,4 kW Tj = operation limit

temperature

PERd 87 %

For air-to-water heat pumps:
T

j

= –15 °C (if TOL < –20 °C)

Pdh 24,1 kW For air-to-water heat pumps:

Tj = –15 °C (if TOL < –20 °C)

PERd 90 %

Annual energy consumption Q

HE

244

GJ

Rated heat output (*)

Prated 36,4 kW

Seasonal space heating

energy efficiency

η

s

116 %

T

j

= +2 °C Pdh 36,4 kW Tj = +2 °C PERd 119 %

T

j

= +7 °C Pdh 23,3 kW Tj = +7 °C PERd 122 %

T

j

= +12 °C Pdh 10,6 kW Tj = +12 °C PERd 116 %

T

j

= bivalent temperature Pdh - kW Tj = bivalent temperature PERd

-%

Annual energy consumption Q

HE

151

GJ

Table 8

COMMISSION DELEGATED REGULATION (EU) No 811/2013

Parameters shall be declared for average, colder and warmer climate conditions.

Technical parameters for heat pump space heaters and heat pump combination heaters

Parameters shall be declared for medium-temperature application.

Declared capacity for heating for part load at indoor
temperature 20 °C and outdoor temperature T

j

Declared coefficient of performance or primary energy
ratio for part load at indoor temperature 20 °C and
outdoor temperature T

j

AVERAGE CLIMATE CONDITIONS

Declared capacity for heating for part load at indoor
temperature 20 °C and outdoor temperature T

j

Declared coefficient of performance or primary energy
ratio for part load at indoor temperature 20 °C and
outdoor temperature T

j

COLDER CLIMATE CONDITIONS

Declared capacity for heating for part load at indoor
temperature 20 °C and outdoor temperature T

j

Declared coefficient of performance or primary energy
ratio for part load at indoor temperature 20 °C and
outdoor temperature T

j

WARMER CLIMATE CONDITIONS

Appendices

Installation, Use and Maintenance Manual – GAHP-A

43

Figure 3

Bivalent temperature T

biv

TOL <
T

designh

°C For air-to-water heat pumps:

Operation limit temperature

TOL -22 °C

Heating water operating limit WTOL 65 °C

Off mode P

OFF

0,000 kW Rated heat output Psup - kW

Thermostat-off mode

P

TO

0,021 kW

Type of energy input

Standby mode P

SB

0,005 kW

Crankcase heater mode

P

CK

- kW

Other items
Capacity control For air-to-water heat pumps:

Rated air flow rate, outdoors

__ 10000 m³/h

Sound power level, indoors/
outdoors

L

WA

- / 80 dB For water- or brine-to-water
heat pumps: Rated brine or
water flow rate, outdoor heat
exchanger

__ - m³/h

Additional information required by COMMISSION REGULATION (EU) No 813/2013, Table 2:
Emissions of nitrogen oxides: NO

x

40 mg/

kWh

(*) For heat pump space heaters and heat pump combination heaters, the rated heat output Prated is equal to the design load for
heating Pdesignh , and the rated heat output of a supplementary heater Psup is equal to the supplementary capacity for heating
sup(Tj) .

Power consumption in modes other than active mode Supplementary heater

variable

monovalent

Appendices

44

Figure 4

Model(s): GAHP-A S1
Air-to-water heat pump: yes
Water-to-water heat pump: no
Brine-to-water heat pump: no
Low-temperature heat pump: no
Equipped with a supplementary heater: no
Heat pump combination heater: no

Item Symbol Value Unit Item Symbol Value Unit

Rated heat output (*)

Prated 29,6 kW

Seasonal space heating

energy efficiency

η

s

113 %

T

j

= -7 °C Pdh 26,1 kW Tj = -7 °C PERd 97 %

T

j

= +2 °C Pdh 16,0 kW Tj = +2 °C PERd 122 %

T

j

= +7 °C Pdh 10,4 kW Tj = +7 °C PERd 119 %

T

j

= +12 °C Pdh 4,4 kW Tj = +12 °C PERd 113 %

T

j

= bivalent temperature Pdh - kW Tj = bivalent temperature PERd

-%

Annual energy consumption Q

HE

195

GJ

Rated heat output (*)

Prated 29,4 kW

Seasonal space heating

energy efficiency

η

s

109 %

T

j

= -7 °C Pdh 17,9 kW Tj = -7 °C PERd 110 %

T

j

= +2 °C Pdh 10,9 kW Tj = +2 °C PERd 119 %

T

j

= +7 °C Pdh 7,1 kW Tj = +7 °C PERd 114 %

T

j

= +12 °C Pdh 3,2 kW Tj = +12 °C PERd 113 %

T

j

= bivalent temperature Pdh - kW Tj = bivalent temperature PERd

-%

T

j

= operation limit

temperature

Pdh 29,4 kW Tj = operation limit

temperature

PERd 88 %

For air-to-water heat pumps:
T

j

= –15 °C (if TOL < –20 °C)

Pdh 24,1 kW For air-to-water heat pumps:

Tj = –15 °C (if TOL < –20 °C)

PERd 91 %

Annual energy consumption Q

HE

239

GJ

Rated heat output (*)

Prated 36,4 kW

Seasonal space heating

energy efficiency

η

s

117 %

T

j

= +2 °C Pdh 36,4 kW Tj = +2 °C PERd 120 %

T

j

= +7 °C Pdh 23,3 kW Tj = +7 °C PERd 123 %

T

j

= +12 °C Pdh 10,6 kW Tj = +12 °C PERd 118 %

T

j

= bivalent temperature Pdh - kW Tj = bivalent temperature PERd

-%

Annual energy consumption Q

HE

150

GJ

Table 8

COMMISSION DELEGATED REGULATION (EU) No 811/2013

Parameters shall be declared for average, colder and warmer climate conditions.

Technical parameters for heat pump space heaters and heat pump combination heaters

Parameters shall be declared for medium-temperature application.

Declared capacity for heating for part load at indoor
temperature 20 °C and outdoor temperature T

j

Declared coefficient of performance or primary energy
ratio for part load at indoor temperature 20 °C and
outdoor temperature T

j

AVERAGE CLIMATE CONDITIONS

Declared capacity for heating for part load at indoor
temperature 20 °C and outdoor temperature T

j

Declared coefficient of performance or primary energy
ratio for part load at indoor temperature 20 °C and
outdoor temperature T

j

COLDER CLIMATE CONDITIONS

Declared capacity for heating for part load at indoor
temperature 20 °C and outdoor temperature T

j

Declared coefficient of performance or primary energy
ratio for part load at indoor temperature 20 °C and
outdoor temperature T

j

WARMER CLIMATE CONDITIONS

Appendices

Installation, Use and Maintenance Manual – GAHP-A

45

Figure 5

Bivalent temperature T

biv

TOL <
T

designh

°C For air-to-water heat pumps:

Operation limit temperature

TOL -22 °C

Heating water operating limit WTOL 65 °C

Off mode P

OFF

0,000 kW Rated heat output Psup - kW

Thermostat-off mode

P

TO

0,021 kW

Type of energy input

Standby mode P

SB

0,005 kW

Crankcase heater mode

P

CK

- kW

Other items
Capacity control For air-to-water heat pumps:

Rated air flow rate, outdoors

__ 10000 m³/h

Sound power level, indoors/
outdoors

L

WA

- / 74 dB For water- or brine-to-water
heat pumps: Rated brine or
water flow rate, outdoor heat
exchanger

__ - m³/h

Additional information required by COMMISSION REGULATION (EU) No 813/2013, Table 2:
Emissions of nitrogen oxides: NO

x

40 mg/

kWh

monovalent

(*) For heat pump space heaters and heat pump combination heaters, the rated heat output Prated is equal to the design load for
heating Pdesignh , and the rated heat output of a supplementary heater Psup is equal to the supplementary capacity for heating
sup(Tj) .

Power consumption in modes other than active mode Supplementary heater

variable

Appendices

46

Lochinvar Ltd
7 Lombard Way, The MXL Centre,
Banbury, Oxon OX16 4TJ
T [phone]
F [phone]
[e-mail]
www.lochinvar.ltd.uk

Revisione: B Codice: D-LBR724 15MCM SDC 014 07/10/2015