Robur GAHP, GA, AY, GAHP GS, GA ACF Installation, Use And Maintenance Manual

Installation, use and maintenance manual

Preassembled groups

Modular heating unit and heater/chiller

powered by gas and renewable energy

Revision: F
Code: D-LBR563

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

INDEX OF CONTENTS

I Introduction .............................................................................

I.1 Recipients ..........................................................................

I.2 Control device ..................................................................

II Symbols and denitions ...............................................

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

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

III Warnings......................................................................................

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

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

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

1 Features and technical data ......................................

1.1 Features ..............................................................................

1.2 Circulating pumps ..........................................................

1.3 Coding .................................................................................

1.4 Dimensions and weights ..............................................

1.5 Roma valve ......................................................................

1.6 Independent circulators selector switch

settings .............................................................................

1.7 Electrical specications ...............................................

1.8 Electronic boards ..........................................................

1.9 Operation mode ............................................................

1.10 Controls ............................................................................

1.11 Technical characteristics .............................................

2 Transport and positioning ........................................

2.1 Warnings ..........................................................................

2.2 Handling ...........................................................................

2.3 Group positioning ........................................................

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

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

3 Heating engineer ...............................................................

3.1 Warnings ..........................................................................

3.2 Hydraulic system ...........................................................

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

3.4 Antifreeze function .......................................................

3.5 Antifreeze liquid ............................................................

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3.6 System water quality ...................................................

3.7 System lling ..................................................................

3.8 Fuel gas supply ..............................................................

3.9 Combustion products exhaust ................................

3.10 Flue gas condensate discharge ................................

3.11 Defrosting water drainage .........................................

3.12 Safety valve drain ..........................................................

4 Electrical installer ..............................................................

4.1 Warnings ..........................................................................

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

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

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

4.5 Water circulation pumps ............................................

5 First start-up ..........................................................................

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

6 Normal operation ..............................................................

6.1 Warnings ..........................................................................

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

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

6.4 Electronic adjustment on the appliance –

Menus and parameters ...............................................

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

6.6 How to restart the locked-down appliances .......

6.7 Circulators lockout ........................................................

7 Maintenance ..........................................................................

7.1 Warnings ..........................................................................

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

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

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

8 Diagnostics ..............................................................................

8.1 Appliances/controllers ................................................

8.2 Circulating pumps ........................................................

9 Appendices..............................................................................

9.1 Wiring diagrams and internal wirings ...................

9.2 Circulating pumps ........................................................

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Installation, use and maintenance manual – RT__ Link

3

Introduction

I INTRODUCTION

I

Manual

This Manual is an integral part of the RT__ Link and must
be handed to the end user together with the preassem­bled group.

I.1 RECIPIENTS

This Manual is intended for:

II SYMBOLS AND DEFINITIONS

II.1 KEY TO SYMBOLS

DANGER

WARNING

NOTE

PROCEDURE

REFERENCE (to other document)

II.2 TERMS AND DEFINITIONS

Appliance/Module (or Units) GAHP/GA/AY = equivalent

terms, both used to designate single gas-red heat/chiller ap­pliance (GAHP A/AR/GS/WS, or GA ACF/HR/TK absorption chiller
or AY00-120 condensing boiler), part of the preassembled unit
together with other modules/appliances.
TAC = Technical Assistance Centre authorised by Robur.

▶

end user, for appropriate and safe use of the preassembled
group;

▶

qualied installer, for correct installation of the preasslem­bled group;

▶

planner, for specic information on the preassembled group.

I.2 CONTROL DEVICE

In order to be able to work, the RT__ Link unit needs a control
device (DDC, CCP/CCI), which must be connected by the installer.

CCI Controller (Comfort Controller Interface) = optional Robur
control device which lets you manage up to three modulating
heat only GAHP units (A, WS, GS).
CCP Controller (Comfort Control Panel) = Robur control de­vice which lets you manage in modulation mode up to three
GAHP units and all system components (probes, diverter/mixing
valves, circulating pumps), including any integration boiler.
DDC Control (Direct Digital Controller) = optional Robur device
to control one or more Robur appliances (GAHP heat pumps, GA
chillers and AY boilers) in ON/OFF mode.
RB100/RB200 Devices (Robur Box) = optional interface devices
complementary to DDC, which may be used to broaden its func­tions (heating/cooling/DHW production service demands, and
control of system components such as third party generators,
adjustment valves, circulators, probes).
Heat generator = equipment (e.g. boiler, heat pump, etc..) pro­ducing heating and/or DHW.
Preassembled Group / RT__ Link = equivalent terms, both
used to designate the generic heat/chiller hydronic group con­sisting of GAHP/GA/AY modules (see denition).
RTAR/RTCF/RTY/RTA/RTAY/RTYR/.. .Link to = initials to desig­nate a specic heat/chiller preassembled group, consisting of a
specic combination of GAHP/GA/AY (see denition).
First start-up = preassembled group commissioning operation
that can only and exclusively be performed by a TAC.

III WARNINGS

III.1 GENERAL AND SAFETY WARNINGS

GAHP/GA/AY modules

As far as the individual GAHP/GA/AY appliances/modules
belonging to the preassembled group are concerned,
read the warnings in the respective Manuals (attached),

with particular regard to the following aspects:
 Poisoning
 Moving parts
 Burn hazard
 Pressure vessels
 Water-ammonia solution
 Limescale and corrosion
 Chloride concentration
 Aggressive substances in air
 Switching the appliances o

4

Qualication of the installer/conductor/maintainer

Installation must exclusively be performed by a qualied
rm and by qualied 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.

III

Warnings

Misuse

The preassembled group 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 preassembled group in hazardous con-

ditions such as: gas odor, hydraulic/electric/gas system
problems, parts of the unit immersed in the water or
damaged, malfunction, deactivation or exclusion of con­trol and safety devices.

 In case of danger, request intervention by qualied per-

sonnel.

 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 preassembled appliance.

Gas component tightness

 Before performing any operation on gas ducting compo-

nents, close the gas valve.

 Upon completing any procedure, perform the tightness

test according to regulations in force.

Gas smell

Distance from combustible or ammable materials

 Do not deposit ammable materials (paper, diluents,

paints, etc.) near the preassembled group.

Acid ue gas condensate

If condensing units are present in the preassembled
group:

 Discharge the acid condensate of combustion ue gas,

as indicated in Paragraph 3.10
with current exhaust regulations.

Shutting down the preassembled group

Interrupting the power supply during the operation of
the preassembled group may cause permanent damage
to the internal components.

 Except for a hazard, do not interrupt the power supply to

turn o the preassembled group, but always and exclu­sively use the provided control device (DDC or CCP/CCI).

In the event of failure

Operations on internal components and repairs may
exclusively be carried out by a TAC, using only original
parts.

 In the event of a failure of the preassembled group, or of

one or more of the individual appliances that make it up
and/or break parts of it, refrain from any repair or restora­tion attempt and contact the TAC immediately.

p. 30

, in compliance

If you smell gas:

 Do not operate electrical devices near the preassembled

group (eg telephones, multimeters or other appliances
that can cause sparks).

 Shut o the gas supply by turning the valve o.
 Disconnect electrical power supply by means of the

external isolation switch in the power supply electrical
panel.

 Ask for qualied personnel from a phone away from the

preassembled group.

Electrocution hazard

Within the preassembled group (and the appliances that
compose it) there are live parts.

 Disconnect the electrical power supply before any oper-

ation on appliance components.

 For electrical connections exclusively use compliant

components and according to the specications provid­ed by the manufacturer.

 Make sure the preassembled group and the individual

GAHP/GA/AY modules of the same can not be reactivat­ed inadvertently.

Connection and disconnection

For the RT__ Link electrical connection and disconnec­tion operations follow the procedure described in Para­graph 7.1

p.40

.

Routine maintenance

Proper maintenance ensures the eciency and good op­eration of the preassembled group over time.

 Maintenance must be performed according to the man-

ufacturer's instructions (see Chapter 7
compliance with current regulations.

 Appliance maintenance and repairs may only be entrust-

ed 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.

 Use only original parts.

Maintenance of GAHP/GA/AY modules

For the maintenance of the individual GAHP/GA/AY
modules belonging to the preassembled group, consult
their respective Manuals (attached).

Decommissioning and disposal

If the preassembled group or some of the individual
GAHP/GA/AY appliances/modules are to be dismantled,
please contact the manufacturer for disposal.

Keep the Manual

p. 40

) and in

Earthing

Electrical safety depends on an eective earthing sys­tem, properly connected to the preassembled group
and executed in accordance with current regulations.

Installation, use and maintenance manual – RT__ Link

This "Installation, Use, and Maintenance Manual", includ­ing all attached documents, must always accompany the
preassembled group and must be delivered to the new
owner or installer for sale or transfer.

5

Warnings

III

III.2 CONFORMITY

EU Directives and standards

The GAHP/GA/AY modules/appliances that are part of RT__ Link,
namely the GAHP series heat pumps, GA ACF series chillers, and
AY00-120 condensing boilers comply with the essential re­quirements of the following standards and directives, each as
applicable:

▶

Eciency Directive 92/42/EEC and subsequent modica­tions and additions.

▶

2016/426/EU "Gas Appliances Regulation" as amended and
added.

▶

2014/30/EC "Electromagnetic Compatibility Directive" as
amended and added.

▶

2014/35/EC "Low Voltage Directive" as amended and added.

▶

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

▶

2014/68/EU "Pressure Equipment Directive" as amended
and added.

▶

EN 12309 appliances for gas-red heating and/or cooling
absorption.

▶

EN 677 Specic requirements for condensing boilers with
nominal heat input 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, heat pumps and chill­ers.

▶

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 guarantee of the individual GAHP/GA/
AY modules/units belonging to the preassembled group
may be invalidated under 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, chlo-

rine, sulphur or other chemical substances contained in
the installation water or present in the air of the instal­lation site.

 Abnormal actions transmitted to the appliance by the

plant or installation (mechanical stresses, pressure, vi­brations, thermal expansion, electrical surges...).

 Accidental damages or due to force majeure.

6

1

1 FEATURES AND TECHNICAL DATA

For the characteristics of the individual modules (GAHP/GA/AY
units) that make up the RT__ Link, and of the control devices
(DDC, CCP/CCI, ...), refer to the respective Manuals (attached).

Features and technical data

The aerothermal modules of RT__ Links may be in conguration:

▶

with standard fans (STD);

▶

with silenced fans (SIL or S1).

1.1 FEATURES

Preassembled groups

The RT__ Links are gas powered (natural gas or LPG) heating/
cooling sets, to supply hot and/or chilled water. Each group con­sists of a certain number of individual gas powered modules/
heating/cooling appliances (GAHP/GA/AY units). The set of ap­pliances and components is preassembled at the factory, form­ing a complete hydronic group already predisposed to be simply
connected to the system.

Application

Each preassembled group according to its conguration (RTAR,
RTCF, RTY, RTAY, RTYR, RTA, ... Links) is able to simultaneously or
alternatively deliver heating, cooling, DHW production and heat
recovery, according to the needs of each single installation, with
a signicantly extensive range of heating and cooling output.
The various hydronic models (RTAR, RTCF, ... Links) are suitable
for all heating and cooling systems operating with hot and/or
chilled water, with common heat exchangers (e.g. radiators,
fan coils, radiant panels, fan heaters, air handling units, DHW
production boilers, pool heat exchangers...), including process
plants (industrial heat exchangers).

Manufacturing features

Each preassembled group, in addition to the GAHP/GA/AY heat­ing/cooling modules/units gas powered, is composed of:

▶

delivery/return stainless steel hydraulic manifolds, insulated
with rigid cups lined with aluminum sheet;

▶

galvanized steel gas outlet manifold;

▶

exible connecting couplings of individual units to hydraulic
and gas manifolds;

▶

condensate discarge manifold (only if A/GS/WS/AY condens­ing appliances are included);

▶

electrical panel with protection devices (2 electrical panels
with more than 5-6 modules);

▶

bearing structure with galvanized steel sections.

Table1.1 Fittings diameter

Installation data

Gas tting diameter 1 1/2” F
Water ttings diameter (inlet/outlet) 2” M
Condensation discharge tting diameter 1” F

Composition (GAHP/GA/AY modules)

The gas heating/cooling modules that make up a RT__ Link can
be:

▶

GAHP units, A/AR/GS/WS versions, absorption heat pumps;

▶

GAHP units, A/AR/GS/WS versions, absorption chillers;

▶

AY unit, condensing boiler.

distinguished in:

▶

aerothermal units (A, AR, ACF, HR, TK, LB);

▶

hydrothermal (WS) and geothermal (GS) units.

in variable number:

▶

from 2 to 5 in the case of GAHP/GA only

▶

from 2 to 8 in the case of GAHP/GA and AY
Groups with aerothermal units must be installed exclusively out­side, while others may be installed either indoors or outdoors.

Congurations

▶

without circulators or with circulators (standard or oversize
circulators);

▶

2, 4 or 6 pipes, ie 1, 2 or 3 pairs of delivery/return hydraulic
collectors/connections for hot and/or cold water, connected
as needed.

1.2 CIRCULATING PUMPS

Preassembled groups without water circulation pumps

If the RT__ Link is without circulators, It must be installed on the
hydraulic/primary circuit at least one circulation pump, suitably
selected and rated (by the designer/installer).

Preassembled groups with water circulation pumps

In the RT__ Links already provided with circulators, each individ­ual GAHP/GA/AY module that is part of the group has (at least) a
single independent circulator.

The circulators are installed externally to the GAHP/
GA units, which have a special protection cover (Figure

1.14

p.19

), while for AY00-120 units the circulators are

installed internally to the unit itself.

The available head at the hydraulic connections of the preas­sembled group should be considered net of internal pressure
drops, in the units and in the hydraulic manifolds.
Table 1.2
nominal ow in the largest conguration.

Table1.2 Minimum residual head

Wilo Yonos 25/0,5-7 2,0
Wilo Yonos 25/0,5-10 3,5
Wilo Stratos Para 25/1-11 2,0
Wilo Stratos Para 25/1-12 5,0

See the Design Manual for more detailed ow, head and pres­sure drop data.

p. 7

provides the minimum residual head at the

residual head [m w.c.]

1.3 CODING

Each group is encoded with a series of letters and digits that dis­tinguish its composition and conguration. In order:

1. (3 or 4 letters) = group type (eg RTAR, RTCF, RTAY, RTA, RTY,

...), based on composing modules (GAHP A/AR/WS/GS, GA
ACF/HR/TK/LB, AY00-120;

2. (2 or 3 digits) = cold power, given by the sum of the cold

powers of the individual modules;

3. (2 or 3 digits) = heat power, given by the sum of the heat

powers of the individual modules;

4. (_, /4 or /6) = number of pipes, ie delivery/return manifold

pairs (1, 2 or 3);

5. (2 letters) = modules type;

6. (_, S, S1) = standard or silenced fans (only for aerothermal

units);

7. (MET/NAT, G25, GPL/LPG) = combustible gas (natural gas or

LPG);

8. (2 or 3 letters) = nationality;

Installation, use and maintenance manual – RT__ Link

7

Features and technical data

1

9. (2 letters) circulators (with or without) and type (standard or

oversize);

10. (1 letter) predispositions, if any.

Figure1.1

The 1.1
coding in detail, providing the key for reading any possible com­position and conguration, starting from an example.

p. 8

table/gure exemplies the meaning of the en-

8

1

1.4 DIMENSIONS AND WEIGHTS

Features and technical data

The dimensions are given for the maximum footprint
conguration.

The weights are given for the maximum weight cong­uration.

Hydraulic/gas connections

Figure1.2 Water, gas and condensate discharge ttings position, for 2

pipes groups - Right side view (dimensions in mm)

Figure1.3 Position of water, gas and condensate connections for

4-pipe groups - Right side view (dimensions in mm)

A Condensate discharge connection [1" F] (only for groups with more than

one condensing unit)
B Gas connection [1 1/2" F]
C Cold/hot water outlet [2" M]
D Cold/hot water inlet [2" M]
* The height of low-noise model is 1650 mm

A Condensate discharge connection [1" F] (only for groups with more

than one condensing unit)
B Gas connection [1 1/2" F]
C Cold/hot water outlet [2" M]
D Cold/hot water inlet [2" M]
E Hot return [2" M]
F Hot delivery [2" M]
* The height of low-noise model is 1650 mm

Installation, use and maintenance manual – RT__ Link

9

Features and technical data

Figure1.4 Position of water, gas and condensate connections for 6-pipe groups - Top view (dimensions in mm)

A Condensate discharge connection [1" F] (only for groups with more than one condensing unit). Sloping manifold, strictly connect on right side
B Gas connection [1 1/2" F]
C Cold/hot water outlet [2" M]
D Cold/hot water inlet [2" M]
E ACF HR recovery hot return (only left connection) [2" M]
F ACF HR recovery hot delivery (only left connection) [2" M]
G Hot return (only right connection) [2" M]
H Hot delivery (only right connection) [2" M]

1

Figure1.5 Position of water, gas and condensate connections for RTGS/WS groups - Right side view (dimensions in mm)

A Condensation drain connection [1 " F]
B Gas connection [1 1/2" F]
C Hot return [2" M]
D Cold return [2" M]
E Hot delivery [2" M]
F Cold delivery [2" M]

10

1

Figure1.6 Preassembled ACF/A/AR group (with 2, 3, 4 and 5 units) - Dimensions and weights of preassembled units - front view (dimensions in mm)

Features and technical data

A 960 kg
B 1440 kg
C 1920 kg
D 2410 kg

Installation, use and maintenance manual – RT__ Link

11

Features and technical data

Figure1.7 Preassembled AY group (with 2, 3, 4 and 5 units) - Dimensions and weights of preassembled groups - front view (dimensions in mm)

1

A 2 AY 330 kg
B 3 AY 450 kg
C 4 AY 580 kg
D 5 AY 700 kg
Note: The weight refers to links congured with oversize circulators

12

1

Figure1.8 Preassembled ACF/A/AR + AY group (with 1+1, 1+2, 1+3, 1+4 units) - Dimensions and weights of preassembled groups - front and top

view (dimensions in mm)

Features and technical data

A 1+2 790 kg (*)
B 1+3 970 kg 1+4 1070 kg (*)
(*) The weight refers to a 2 pipe link (silent ventilation, "S"), congured with oversize circulators

The GAHP/GA + 1 AY00-120 congurations are replaced
by the Gitié units.

Installation, use and maintenance manual – RT__ Link

13

Features and technical data

Figure1.9 Preassembled ACF/A/AR + AY group (with 1+5, 2+1 and 2+2 units) - Dimensions and weights of preassembled groups - front and top

view (dimensions in mm)

1

14

A 1+5 1210 kg (**)
B 2+1 1150 kg (*) 2+2 1270 kg (*)
(*) The weight refers to a 2 pipe link (silent ventilation, "S"), congured with oversize circulators
(**) The weight refers to a 4 pipe link (silent ventilation, "S"), congured on both circuits with oversize circulators

1

Figure1.10 Preassembled ACF/A/AR + AY group (with 2+3, 2+4 and 2+5 units) - Dimensions and weights of preassembled groups - front and top

view (dimensions in mm)

Features and technical data

A 2+3 1460 kg (*) 2+4 1560 kg (**)
B 2+5 1700 kg (**)
(*) The weight refers to a 2 pipe link (silent ventilation, "S"), congured with oversize circulators
(**) The weight refers to a 4 pipe link (silent ventilation, "S"), congured on both circuits with oversize circulators

Installation, use and maintenance manual – RT__ Link

15

Features and technical data

B

Figure1.11 Preassembled ACF/A/AR + AY group (with 3+1, 3+2 and 3+3 units) - Dimensions and weights of preassembled groups - front and top

view (dimensions in mm)

1

16

137

4936

A 3+1 1630 kg (*) 3+2 1750 kg (*)
B 3+3 1880 kg (**)
(*) The weight refers to a 2 pipe link (silent ventilation, "S"), congured with oversize circulators
(**) The weight refers to a 4 pipe link (silent ventilation, "S"), congured on both circuits with oversize circulators

155415291554

137

1

Figure1.12 Preassembled ACF/A/AR + AY group (with 3+4 and 3+5 units) - Dimensions and weights of preassembled groups - front and top view

(dimensions in mm)

Features and technical data

A

A 3+4 2060 kg (*)
B 3+5 2190 kg (*)
(*) The weight refers to a 4 pipe link (silent ventilation, "S"), congured on both circuits with oversize circulators

Installation, use and maintenance manual – RT__ Link

B

17

Features and technical data

Figure1.13 Preassembled ACF/A/AR + AY group (with 4+1, 4+2, 4+3 and 4+4 units) - Dimensions and weights of preassembled groups - front and

top view (dimensions in mm)

1

A

18

B

A 4+1 2120 kg (*) 4+2 2240 kg (**)
B 4+3 2380 kg (**) 4+4 2480 kg (**)
(*) The weight refers to a 2 pipe link (silent ventilation, "S"), congured with oversize circulators
(**) The weight refers to a 4 pipe link (silent ventilation, "S"), congured on both circuits with oversize circulators

1

H

1.5 ROMA VALVE

Preassembled groups equipped with water circulation pumps
are also equipped with a check valve, mounted downstream of
each water circulation pump, equipped with air vent valves, as

Figure1.14 Roma valve GAHP/GA units

Features and technical data

detailed in the following Figure 1.14
units and in the following Figure 1.15
units.

p. 19

for the GAHP/GA

p.19

for the AY00-120

A Protection cover
B Protection cover
C Valve insulation
D Roma valve
E Air-vent valve
F Air-vent valve
G Circulator
H Connection to return

manifold

Figure1.15 Roma valve AY00-120 units

G

E

F

D Roma valve
E Air vent
E Air vent
G Circulator
H Connection to return

manifold

D

Installation, use and maintenance manual – RT__ Link

19

Features and technical data

1

1.6 INDEPENDENT CIRCULATORS SELECTOR

SWITCH SETTINGS

In the RT__ Links already provided with circulators, each circu­lator is provided with a selector switch to determine the driving
mode of the circulator itself.
For Wilo Stratos Para circulators (available as optional), the selec­tor switch is set as shown in Figure 1.16
the type of unit to which the circulator is connected.

Figure1.16 Wilo Stratos Para circulator selector switch setting

p.20

, depending on

For Wilo Yonos Para circulators (standard on RT__ Links already
provided with circulators) the selector switch must be set as
shown in Figure 1.17

Figure1.17 Wilo Yonos circulator selector switch setting

p.20

.

A GAHP A, GAHP GS/WS
B GAHP-AR, GA ACF, AY00-120

20

1

1.7 ELECTRICAL SPECIFICATIONS

Group Electrical Panel

Figure1.18 Group Electrical Panel

Features and technical data

IG Group electrical panel (QEG) switch disconnector
TR transformer 230/24 Vac
M1 transformer primary fuse
M2 condensate heating resistance protection fuse
M9 transformer secondary fuse
A blind panel (for detail of internal terminal blocks see specic gure)
I1 "ID00" unit magnetothermic breaker

Internal wiring diagrams

For the wiring diagrams of the internal cabling of the preassem­bled group, see the examples of some representative RT__ Link
models, in the Appendix 9.1

p.43

.

Power supply

The power supply of preassembled groups is 400 V three-phase
or 230 V single-phase.

Degree of protection

Preassembled groups have degree of protection IP X5D.

1.8 ELECTRONIC BOARDS

Electronic boards

Each module/unit GAHP/GA/AY belonging to the group has one
or more electronic boards (S61/Mod10/W1/AR11/AY10/S70) in­side it. The boards are pre-wired, interconnected and connected
to the Electrical Panel of the preassembled group via a CAN­BUS signal cable. For the characteristics of the boards, see the

I2 "ID01" unit magnetothermic breaker
I3 "ID02" unit magnetothermic breaker
I4 "ID03" unit magnetothermic breaker
I5 "ID04" unit magnetothermic breaker
I6 "ID05" unit magnetothermic breaker
Note: the components within the QEG may have an order and/or position other

than the one shown in the gure

manuals of the individual GAHP/GA/AY units.

1.9 OPERATION MODE

ON/OFF or modulating operation

Depending on the types, the GAHP/GA/AY modules present on a
RT__ Link can work in one of the two following ways:

▶

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 heating capacity, with circulating pump at variable

ow.
The GAHP A, GAHP GS/WS modules can operate both in mode
(1) and mode (2).
GAHP-AR, GA ACF/HR/TK, and AY00-120 modules can only op­erate in mode (1).
For each mode, (1) or (2), specic control systems and devices
are provided (Paragraph 1.10

p.22

).

Installation, use and maintenance manual – RT__ Link

21

Transport and positioning

1.10 CONTROLS

Control device

The preassembled group can only work when connected to a
control device, chosen from:

▶

(1) DDC controller (for ON/OFF operation);

▶

(2) CCP/CCI controller (for modulating operation, only for

A/WS/GS).
For connection of the selected device to the RT__ Link Electrical
Panel (Figure 4.4

1.10.1 Control system (1) with DDC (GAHP unit ON/

The DDC controller is able to control appliances, a single GAHP
unit, or even several Robur GAHP/GA/AY units in cascade, only
in ON/OFF mode (non modulating). For more details refer to the
DDC, RB100, RB200 Manuals and the Design Manual.

DDC Controller

The main functions are:

▶

setup and control of one (or more) Robur units of the ab-

sorption line (GAHP, GA, AY);

▶

Data display and parameters setting.

OFF)

p.34

), see Paragraph 4.4

p.33

.

2

▶

Hourly programming.

▶

Climatic curve control.

▶

Diagnostics.

▶

Errors reset.

▶

Possibility to interface with a BMS.
DDC functionality may be extended with auxiliary Robur devices
RB100 and RB200 (e.g. service requests, DHW production, Third
Party generator control, probe control, system valves or circulat­ing pumps, ...).

1.10.2 Control 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.

1.11 TECHNICAL CHARACTERISTICS

Refer to the technical data of the individual GAHP/GA/AY mod­ules making up the group.

2 TRANSPORT AND POSITIONING

2.1 WARNINGS

Damage from transport or installation

The manufacturer shall not be liable for any damage
during transport and installation of the preassembled
group.

On-site inspection

 Upon arrival at the site, ensure there is no transport dam-

age on packing, preassembled group, metal panels or
nned coils of the appliances that make up it.

 After removing the packing materials, ensure the preas-

sembled group is intact and complete.

Packing

 Only remove the packing after placing the preassembled

group on site.

 Do not leave parts of the packing within the reach of

children (plastic, polystyrene, nails...) since they are po­tentially dangerous.

2.2 HANDLING

Handling and lifting

▶

Always handle the preassembled group in its packing, as de-

livered by the factory.

▶

To lift the assembled group use straps or slings inserted in

the holes of the base (Figure 2.1

▶

Use lifting beams to avoid damaging the outer panels and

the nned coils (Figure 2.1

▶

Comply with safety regulations at the installation site.

Figure2.1 Instruction for lifting

p.22

p.22

)

).

22

Weight

 The crane and lifting equipment must be suitable for the

load.

 Do not stand under suspended loads.

For weight, refer to Figures from 1.6

1.13

p.18

.

p. 11

to

A Front view
B Side view

In the event of handling with forklift or pallet truck,
comply with the handling instructions shown on the
packing.

2

Transport and positioning

2.3 GROUP POSITIONING

Do not install the aerothermal RT__ Links inside a
room

The aerothermal RT__ Links include devices equipped
with nned coils and fan, approved for outdoor
installation.

 Do not install the aerothermal RT__ Links inside a room,

not even if it has openings.

 In no event start the aerothermal RT__ Link inside a

room.

Ventilation of aerothermal RT__ Links

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

Defrosting water drainage of RT__ aerothermal Links

In winter, in the aerothermal RT__ Links with GAHP A/AR units,
frost may form on the nned coils and the aerothermal applianc­es perform defrosting cycles.

▶

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

In the event of indoor installation, the installation premises must
comply with the applicable local standards.

Do not install in a room that has no aeration openings.

Please refer to the manuals of the individual units suitable for
indoor installation, supplied with the links, for further important
prescriptions on the technical room.

2.4 MINIMUM CLEARANCE DISTANCES

Distances from combustible or ammable materials

▶

Keep the group away from combustible or ammable ma­terials or components, in compliance with applicable regu­lations.

Clearances around the preassembled group

The minimum clearance distances shown in Figure 2.2
(bar any stricter regulations) are required for safety, operation
and maintenance.

Figure2.2 Minimum clearances (dimensions in mm)

p.23

Where to install the preassembled group for external
versions

In general, for all RT__ Links:

▶

They can be installed at ground level, on a terrace or on a
roof , if compatible with their dimensions and weight.

▶

They must be out of the dripping line from gutters or similar.
They do not require protection from atmospheric agents.

▶

No obstruction or overhanging structure (protruding roofs,
eaves, balconies, ledges, trees) shall obstruct the exhaust
fumes.

▶

The group ue gas exhaust must not be immediately close
to openings or air intakes of buildings, and must comply
with environmental regulations.

In particular, for aerothermal RT__ Links:

▶

They must be installed outside buildings, in an area of natu­ral air circulation.

▶

No obstruction or overhanging structure (e.g. protruding
roofs, canopies, balconies, ledges, trees) must interfere with
the air owing out from the top of the appliances tted with
fans.

▶

Do not install near the exhaust of ues, chimneys or hot pol­luted air. In order to work correctly, aerothermal appliances
require clean air.

Acoustic issues

▶

Pre-emptively assess the group'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.

Machine room requirements for hydrothermal or
geothermal RT__ Links

Hydrothermal and geothermal RT__ Links (made up by GAHP
GS/WS modules) and the AY00-120 boilers links as well may be
installed either indoors or outdoors.

2.5 MOUNTING BASE

Mounting base constructive features

▶

Place the preassembled group on a levelled at surface
made of reproof material and able to withstand its weight.

(1) - installation at ground level

▶

Failing a horizontal supporting base, make a at and leveled
concrete base, at least 150 mm larger than the group dimen­sions on each side.

(2) - installation on terrace or roof

▶

The structure of the building must support the total weight
of the group and the mounting base.

▶

If necessary, provide a maintenance walkway around the
preassembled group.

Anti vibration connections and mountings

Although the group vibrations are minimal, resonance phenom­ena might occur in roof or terrace installations.

▶

Use anti-vibration mountings.

▶

Also provide anti-vibration joints between the preassem­bled group and water and gas pipes.

Installation, use and maintenance manual – RT__ Link

23

Heating engineer

3 HEATING ENGINEER

3

3.1 WARNINGS

General warnings

Read the warnings in Chapter III.1
portant information on regulations and on safety.

Compliance with installation standards

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

of:
 heating systems;
 cooling systems;
 gas systems;
 electrical systems;
 ue gas exhaust;
 ue gas condensate discharge.

Installation must also comply with the manufacturer's

provisions.

GAHP/GA/AY modules

As far as the individual GAHP/GA/AY modules belonging

to the preassembled group are concerned, read the rel-

evant warnings and dangers in their respective Manuals

(attached).

p. 4

, providing im-

the gures 3.1

p.25

and 3.3

p.26

.

Hydraulic diagrams RT__ Links without circulating
pumps

These applications must be evaluated with particular care. The
common circulation pump is not provided with the link. Some
examples are shown in the gures 3.2

p.25

and 3.4

p.27

.

Minimum water content and buer tank

A high thermal inertia of the system favors the ecient opera­tion of the appliances that are part of the group. Very short ON/
OFF cycles must be avoided.

▶

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

3.3 HYDRAULIC CONNECTIONS

Plumbing ttings

▶

O (= out) 2" M - WATER OUTLET (hot/chilled) (m = delivery to
the system);

▶

I (= in) 2 " M - WATER INPUT (r = return from the system).

on the right, at the bottom.
They can be moved to the left side by moving the blind caps
(unscrew and retighten).
(Figures 1.2

Hydraulic pipes, materials and features

▶

Use pipes for heating/cooling installations, protected from
weathering, insulated for thermal losses, with vapour barrier
to prevent condensation.

p.9

, 1.3

p.9

, 1.4

p.10

, 1.5

p.10

).

3.2 HYDRAULIC SYSTEM

Design and implementation

▶

The system must be designed and realized in a congruent
way with the features and functionality of the RT__ Link.

▶

For the appropriate system design, the following must be
considered: the characteristics of individual heating/cooling
appliances (GAHP/GA/AY modules/units) that make up the
group; the conguration of the manifolds and hydraulic con­nections; the endowment (or not) of circulators.

▶

For detailed information, please refer to the Design Manual
and/or contact the Robur consultancy service.

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 tank/buer.

Water ow

The preassembled group can be:

▶

already equipped with circulators for each unit/module (pre­ferred conguration in many applications);

or

▶

without circulators, and then at least one common circu­lation pump at the primary circuit (a choice to be carefully
evaluated) will need to be installed.

Pipe cleaning

 Before connecting the preassembled group, accurately

wash the water and gas piping and any other system
component, removing any residue.

Minimum components of primary plumbing circuit

▶

Always provide, near the hydraulic connections of the pre­assembled group:

on water piping, both output and input (m/r)

 2 antivibration joints on water ttings
 2 pressure gauges
 2 isolation ball valves

on the input water piping (r)

 1 SEPARATOR FILTER;
 1 FLOW ADJUSTMENT VALVE, if the circulating pump is

constant ow (only for links without circulators);

 1 WATER CIRCULATION PUMP, towards the appliance (on-

ly for links without circulators);

on the output water piping (m)

 1 safety valve (3 bar)
 1 expansion tank of the individual unit

24

Hydraulic diagrams RT__ Links with circulating pumps

Preferable in many applications. Some examples are shown in

3

Principle schemes

Figure3.1 Example of hydraulic system diagram for connection of n. 1 RTCR version with circulating pumps

Heating engineer

1 anti-vibration connections
2 water lter (mesh min. 0.7 mm and max 1 mm)
3 shut-o valve
4 expansion tank of the primary circuit
5 3 bar safety valve

For the maximum available pressure head see Table 1.2

p.7

.

6 hydraulic separator (with air vent valve and drain valve)
7 expansion tank of the secondary circuit
8 circulating pump of the secondary circuit
9 DDC control panel

Figure3.2 Example of hydraulic system diagram for connection of n. 1 RTCR version without circulating pumps

1 anti-vibration connections
2 pressure gauge
3 ow regulator valve
4 water lter (mesh min. 0.7 mm and max 1 mm)
5 shut-o valve
6 expansion tank of the primary circuit

7 3 bar safety valve
8 primary circuit circulating pump
9 hydraulic separator (with air vent valve and drain valve)
10 expansion tank of the secondary circuit
11 circulating pump of the secondary circuit
12 DDC control panel

Installation, use and maintenance manual – RT__ Link

25

Heating engineer

Figure3.3 Example of hydraulic system diagram for connection of n. 2 RTCR, version with circulating pumps

3

1 anti-vibration connections
2 water lter (mesh min. 0.7 mm and max 1 mm)
3 shut-o valve
4 expansion tank of the primary circuit
5 3 bar safety valve

For the maximum available pressure head see Table 1.2

p.7

6 hydraulic separator (with air vent valve and drain valve)
7 expansion tank of the secondary circuit
8 circulating pump of the secondary circuit
9 DDC control panel

.

26

3

Figure3.4 Example of hydraulic system diagram for connection of n. 2 RTCR version without circulating pumps

Heating engineer

1 anti-vibration connections
2 pressure gauge
3 ow regulator valve
4 water lter (mesh min. 0.7 mm and max 1 mm)
5 shut-o valve
6 expansion tank of the primary circuit

3.4 ANTIFREEZE FUNCTION

Active antifreeze self-protection

The appliances (GAHP/GA/AY modules/units) that make up a
preassembled group are equipped with an antifreeze active
self-protection system to prevent freezing. The antifreeze func­tion automatically starts the primary circulation pumps, and if
necessary also the burners (heat pumps and boilers only), when
the outside temperature approaches zero. Antifreeze function is
enabled by default for hot units and deactivated for cold units.

Electrical and gas continuity

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

3.5 ANTIFREEZE LIQUID

7 3 bar safety valve
8 primary circuit circulating pump
9 hydraulic separator (with air vent valve and drain valve)
10 expansion tank of the secondary circuit
11 circulating pump of the secondary circuit
12 DDC control panel

 Always check product suitability and its expiry date with

the glycol supplier. Periodically check the product's pres­ervation state.

 Do not use car-grade antifreeze liquid (without inhibi-

tors), nor zinc-coated piping and ttings (incompatible
with glycol).

 Glycol modies the physical properties of water (densi-

ty, 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.

When producing DHW by DHW buer tank, use pro­pylene glycol only.

Precautions with glycol

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

Installation, use and maintenance manual – RT__ Link

Type of antifreeze glycol

Inhibited type glycol is recommended to prevent oxidation
phenomena.

27

Heating engineer

3

Glycol eects

The Table 3.1

Table3.1 Technical data for lling the hydraulic circuit

p. 28

shows, indicatively, the eects of using a

glycol %

10 -3 °C - ­15 -5 °C 6,0% 0,5%
20 -8 °C 8,0% 1,0%
25 -12 °C 10,0% 2,0%
30 -15 °C 12,0% 2,5%
35 -20 °C 14,0% 3,0%
40 -25 °C 16,0% 4,0%

Water-glycol mixture freezing temper-

ature

3.6 SYSTEM WATER QUALITY

Responsibility of the user/operator/installer

The installer, the operator and the user must assure system water
quality of the plant water (Table 3.2
the manufacturer's instructions may compromise the operation,
integrity and durability of the appliances (GAHP/GA/AY mod­ules/units) that make up the group, invalidating the warranty.

System water characteristics

Free chlorine or water hardness may damage the preassembled
group.
Adhere to the chemical-physical parameters in Table 3.2
and the regulations on water treatment for residential and in­dustrial heating systems.

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 (CaCO3)

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 lower than 8 (in compliance

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

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 preassem­bled group, the system, the environment and health.

 Contact specialised rms or professionals for water treat-

ment or system washing.

p.28

). Failure to observe

°f < 15

°d < 8,4

p.28

glycol depending on its %.

Percentage of increase in pressure drops Loss of eciency of unit

 Check compatibility of treatment or washing products

with operating conditions.
 Do not use aggressive substances for stainless steel.
 Do not leave washing residues.

3.7 SYSTEM 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. In links with circulators vent the circulators through the

vent valves in the body of the respective check valves

(see procedure below).

3. Let water ow (with appliances o).

4. Check and clean the lter(s) on the inlet pipe.

5. Repeat items 1, 2 and 3 until stabilization.

How to vent the GAHP/GA unit circulators (for links

with independent circulators)

1. Turn o the system by means of specially provided control

devices (DDC or CCP/CCI) and wait for the circulators to stop.

2. Remove the pump group protection cover (Figure

1.14

p.19

, details A and B).

3. Open the insulation (Figure 1.14

p.19

, detail C).

4. Close the sectioning valve on the delivery of the preassem-

bled group and open the rst vent valve (Figure 1.14
detail E).

5. Close the rst vent valve and open the sectioning valve on

the delivery of the preassembled group.

6. Close the sectioning valve on the return of the preassembled

group and open the second vent valve (Figure 1.14
detail F).

7. Close the second vent valve and open the sectioning valve

on the return of the preassembled group.

8. Reactivate the system and let water ow (with switched o

appliances).

9. If the air vent has been properly completed, close the insula-

tion and reassemble the protective covers. If not, repeat the
procedure from step 4.

How to vent the AY unit circulators (for links with in-

dependent circulators)

1. Turn o the system by means of specially provided control

devices (DDC or CCP/CCI) and wait for the circulators to stop.

2. Disassemble the front panel of the unit.

3. Close the sectioning valve on the delivery of the preassem-

bled group and open the rst vent valve (Figure 1.15
detail E).

p.19

p.19

p.19

,

,

,

28

3

Heating engineer

4. Close the rst vent valve and open the sectioning valve on

the delivery of the preassembled group.

5. Close the sectioning valve on the return of the preassembled

group and open the second vent valve (Figure 1.15

p.19

detail F).

6. Close the second vent valve and open the sectioning valve

on the return of the preassembled group.

7. Reactivate the system and let water ow (with switched o

appliances).

8. If the air vent has been properly completed, reassemble the

front panel of the unit. If not, repeat the procedure from step

4.

The correct lling and air venting of the hydraulic system
are fundamental to ensure reliability over time of the
mechanical components, in particular the circulation
pumps.

3.8 FUEL GAS SUPPLY

Gas connection

▶

1"1/2 F

on the right, at the bottom.
It can be moved to the left side by moving the blind cap (unscrew

and retighten).

▶

Install an anti-vibration connection between the preassem­bled group and the gas supply piping.

,

Mandatory shut-o valve

▶

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

▶

Perform connection in compliance with applicable regula­tions.

Gas pipes sizing

The gas pipes must not cause excessive pressure drops and,
consequently, insucient gas pressure for the appliances of the
group.

Supply gas pressure

This appliance is equipped for a maximum gas supply
pressure of 50 mbar.

The preassembled group appliances gas supply pressure, both
static and dynamic, must comply with Table 3.3
erance ± 15%.

Non compliant gas pressure may damage the appliances
and be hazardous.

p.29

, with tol-

Table3.3 Gas network pressure

Product
category

II

2H3B/P

II

2H3P

II

2ELL3B/P

II

2Esi3P

II

2HS3B/P

II

2E3P

II

2L3B/P

II

2EK3B/P

II

2E3B/P

II

2ELwLs3B/P

II

2ELwLs3P

I

2E(S)

I

3P

I

2H

I

3B/P

I

3B

Countries of destination

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

AT, CH 20 50 50
BG, CH, CZ, ES, GB, HR, IE, IT, LT, MK, PT,

SI, SK, TR
RO 20 30
AT 20 50
DE 20 20 50 50

; II

FR 20 25 37

2Er3P

HU 25 30 30 25 (1) (2)
LU 20 50

NL 25 30 30
NL 20 30 30 25 (1) (2)

PL

; I

BE 20 25 37

3P

IS 30
LV 20

MT

Gas supply pressure

G20

[mbar]

20 30 30

20 37

20 37 37
20 37 37 20 (2) 13 (2)
20 37 20 (2) 13 (2)

G25

[mbar]

G30

[mbar]

30 30

30

G31

[mbar]

G25.1

[mbar]

G25.3
[mbar]

G27

[mbar]

G2,350

[mbar]

(1) GAHP-AR not approved for G25.1, G25.3 gases.
(2) GA ACF not approved for G25.1, G27, G2.350, G25.3 gases.

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;

Installation, use and maintenance manual – RT__ Link

▶

a second stage pressure reducer, close to the group.

3.9 COMBUSTION PRODUCTS EXHAUST

Compliance with standards

The apliances that make up a preassembled group
(GAHP/AY modules/units) are approved for connection
to a discharge duct of combustion products.

29

Heating engineer

3

Flue gas exhaust connection

The diameters (mm) of the connections, the residual head (Pa),
the ow rate (kg/h), the temperature (°C) and other smoke dis­charge properties of the individual GAHP/AY units belonging to
the group are indicated in their respective Manuals (attached).
For more informations, see also the Design Manual.

Flue gas exhaust kit

GAHP/AY units that are part of the group are equipped as stand­ard with smoke exhaust kits, already assembled or to be assem­bled by the installer, which generally includes:

▶

1 pipe complete with terminal and socket for fuel gas anal­ysis;

▶

1 support collar;

▶

1 possible 90° curve;

▶

1 rain cover.

How to install the ue gas kit

See the relevant instructions in the respective Manuals
of each GAHP/GA/AY appliance.

Possible ue

If necessary, the preassembled group can be connected to one
or more ue(s).

▶

To size the ue(s) refer to the data and information in the
GAHP/GA/AY individual manuals and the Design Manual.

▶

GAHP/GA/AY modules with dierent types of smoke exhaust
can not be connected to the same ue, but must be connect­ed to separate ue.

▶

If several appliances are connected to a single ue, a clapet
valve is required on each drain, except the AR modules that
are natural draw.

▶

The ues must be designed, sized, veried and realized by a
qualied rm, with materials and components in accordance
with regulations in force in the country of installation.

▶

Always provide the necessary sockets for smoke analysis in
an accessible position.

3.10 FLUE GAS CONDENSATE DISCHARGE

If the preassembled group include GAHP A, GAHP GS/WS and
AY00-120 condensing appliances, condensation water is pro­duced from combustion fumes, which must be evacuated in
compliance with current regulations.

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 ca-

pacity.

Do not use gutters to discharge the condensate

opposite side as the condensate manifold is sloping to-

wards the right side.

Flue gas condensate evacuation

To make the condensate evacuation duct:

▶

Size the ducts for maximum condensation ow rate (kg/h),
equal to the sum of the ow rates of the individual GAHP/AY
appliances/modules (see Manuals of the individual GAHP/AY
units attached);

▶

Use plastic materials resistant to acidity with pH 3 to 5;

▶

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

▶

Prevent freezing;

▶

Dilute, if possible, with domestic waste water (bathrooms,
washing machines, dish washers...), basic and neutralising.

Charging the siphon

In case of indoor installation, to prevent an initial discharge of
combustion products from the condensate drain, charge the si­phon itself as described in the relative paragraph of the manuals
supplied with the single units.

If the appliance is operated with the siphon empty, there

is a risk of leaks of combusted gas.

3.11 DEFROSTING WATER DRAINAGE

Aerothermal units defrosting

In winter, in the aerothermal RT__ Links with GAHP A/AR

units, frost may form on the nned coils and the aero-

thermal appliances perform defrosting cycles.

Collection basin and drainage system

▶

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

3.12 SAFETY VALVE DRAIN

In the event of indoor installation, arrange for external piping of
the safety valve drainage, proceeding as described in the rela­tive paragraph of the manuals supplied with the individual units.

The safety valve drain must be mandatorily ducted out-

side. Failure to comply with this provision jeopardizes

rst start-up.

Do not install any shut o device on the exhaust duct

between the safety valve and the outside exhaust.

30

Do not discharge the fume condensate 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
right side of the preassembled group (condensate discharge
manifold below Figures 1.2

1.5

p.10

).

The condensate drain cap can not be moved on the

p. 9

, 1.3

p. 9

, 1.4

p. 10

,

4

4 ELECTRICAL INSTALLER

Electrical installer

4.1 WARNINGS

General warnings

Read the warnings in Chapter III.1
portant information on regulations and on safety.

Compliance with installation standards

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

Installation must also comply with the manufacturer's
provisions.

Live components

 After placing the preassembled group in the nal posi-

tion, and prior to making electrical connections, ensure
not to work on live components.

Earthing

 The preassembled group must be connected to an eec-

tive earthing system, installed in compliance with regu­lations in force.

 It is forbidden to use gas pipes as earthing.

Do not use the power supply switch to turn the preas­sembled group on/o

 Never use the external switch to turn the preassembled

group on and o, as it may cause damage to the appli­ances and the system.

p. 4

, providing im-

 To turn the preassembled group on and o, exclusively

use the suitably provided control device (DDC or CCP/
CCI).

Control of water circulation pump

In the case of RT__ Links without circulators:

 The common hydraulic/primary circuit water pump must

be controlled by the Electrical Panel of the preassembled
group (terminals KK, PP, 12).

 Circulator start/stop is not allowed without the request

of the preassembled group.

GAHP/GA/AY modules

As far as the individual GAHP/GA/AY modules belonging
to the preassembled group are concerned, read the rel­evant warnings and dangers in their respective Manuals
(attached).

4.2 ELECTRICAL SYSTEMS

Electrical connections must provide:

▶

(a) power supply line (three-phase or single-phase)

▶

(b) control system.

How to make connections

All electrical connections must be made in the preas­sembled group Electric Panel (QEG) (Figures 1.18
and 4.1

p.31

):

1. Ensure the group Electrical Panel is not live.

2. Open the Electric Panel with the appropriate key and re-

move the lower blind panel to access the terminal blocks.

3. Insert the wires through the suitable holes.

4. Make the connections.

5. Made the connections, reposition the blind panel and

reclose the Electrical Panel.

p.21

Figure4.1 Blind panel: detail of internal terminal blocks on DIN rail

A blind panel of QEG
AE power supply input terminals
K1-K2 24 V coil terminals for circulator request (hot/cold circuit side)
R-H condensate heating resistor terminals

Installation, use and maintenance manual – RT__ Link

1-2 24 V coil terminals for circulating pump request (HR recovery circuit side)
T1-T2 DHW tank thermostat terminals (HR recovery circuit side)
M 2-pole 24 Vac connector for service uses
CAN 3-pole connector for CAN bus network connection

31

Electrical installer

4

4.3 ELECTRICAL POWER SUPPLY

Electrical protection

A 4-pole (three-phase) disconnector GS Figure 4.2
or bipolar (single-phase) IR+Id Figure 4.3
be provided by the installer in the external power supply
electrical panel, with fuses suitable for phases, minimum
contact opening 3 mm. No fuse on the neutral is allowed.
Indirect contact protection by means of dierential
switch and overload must be guaranteed by means of a
suciently dimensioned automatic switch or fuse.

Do not modify the RT__ Link Electric Panel or add com­ponents inside it (relays, ...).

Power supply line (three-phase or single-phase)

Provide a protected line (by the installer), which may be:

▶

three phase 400 V 3N - 50 Hz (Figure 4.2

or as an alternative,

▶

single phase 230 V 1N - 50 Hz (Figure 4.3

Figure4.2 Three phase power supply electrical connection 400 V 3N - 50 Hz

p.32

p.33

),

).

p. 33

p.32

must

How to connect the power supply

To connect the multipole power cable (Figures 4.2

4.3

p.33

):

1. Access the terminal blocks in the Electrical Panel of the

group (Paragraph 4.2

2. Locate the "AE" terminal block; with the "R-S-T-N" terminals.

3. Connect the conductors (ve/three-phase or three/sin-

gle-phase), providing the longest for the grounding (last to
break in case of accidental traction), to R-S-T-N three-phase
400 V 3N - 50 Hz terminals, Figure 4.2
terminals (phase L connected to all R,S,T terminals) for single
phase 230 V 1N - 50 Hz, Figure 4.3

4. Made the connections, reposition the blind panel and re-

close the Electrical Panel.

A cabling error, as well as aecting the operation, could

also damage the electrical components of the preassem-

bled group. In particular, in case of three-phase power

supply, be sure not to connect one of the phases to ter-

minal N.

p.31

).

p.32

p.33

.

p. 32

and

, or to (RST)-N

32

AE power supply input terminals
GS three-phase magnetothermic switch
RSTN phases/neutral

4

Figure4.3 Single phase power supply electrical connection 230 V 1N - 50 Hz

Electrical installer

AE power supply input terminals
IR bipolar disconnector with suitable fuse and minimum contact opening of 3 mm
LN phase/neutral

4.4 SETUP AND CONTROL

Electronic boards S61/Mod10/W10/AR11/AY10/S70

The RT__ Link electronics consists of the S61/Mod10/W10/AR11/
AY10/S70 electronic boards of the individual GAHP/GA/AY mod­ules that are interconnected (pre-wired) by the CAN-BUS cable.
For information on S61/Mod10/W10/AR11/AY10/S70 electron­ic boards, see the manuals for the single GAHP/GA/AY unit
(attached).

Control systems, options (1) or (2)

Two separate control systems are provided for RT__ Links, (1)
and (2), each with specic features, components and diagrams:

▶

System (1), with the DDC control (with CAN-BUS

connections);

▶

System (2), with the CCP/CCI control (with CAN-BUS con-
nections).

For electrical connections and hookup Figure 4.4

CAN-BUS communication network

See GAHP/GA/AY units or DDC/RB100/RB200 control devices
manuals.

CAN-BUS signal cable

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

4.1

p.33

(admissible types and maximum distances).
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.

Table4.1 CAN bus cables type

CABLE NAME SIGNALS / COLOR MAX LENGTH Note
Robur

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

Honeywell SDS 1620

BELDEN 3086A
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

H= BLACK L= WHITE GND= BROWN 450 m

p.34

.

Ordering Code OCVO008

In all cases the fourth conductor should not be
used

How to connect the CAN-BUS cable to the RT__ Link

To connect the CAN-BUS cable to the preassembled group Elec­trical Panel, hence to the pre-wired S61/AY10 boards of the ap­pliances it consists of (Figure 4.4

p.34

):

Installation, use and maintenance manual – RT__ Link

1. Access the terminal blocks in the Electrical Panel of the

group (Paragraph 4.2

p.31

).

2. Locate the "CAN" terminal block with the "GND-L-H"

terminals.

3. Connect the CAN-BUS cable to the GND (shielding/earthing)

33

Electrical installer

4

+ L and H terminals (two signal wires).

4. Block the cable with the earthing terminal located behind

the DIN bar, ensuring a good electrical contact is made with
the shielding braid and the bare conductor (if any); see detail
in Figure 4.4

5. Position the J1 jumpers of the board of the last appliance on

the left of the RT__ Link closed if the node is terminal (case of

Figure4.4 Connection with CAN-BUS cable between 1 CCI/DDC and the electrical panel of the preassembled group

p.34

.

one RT__ Link only) or open if the node is intermediate (case
of several RT__ Links in the same system) Figure 4.6

6. Connect the CCI or the DDC (and possibly the RB100 or the

RB200) via the CAN-BUS cable according to the instructions
in the relevant device manuals.

7. Made the connections, reposition the blind panel and re-

close the Electrical Panel.

p.36

.

CAN 3-pole connector for CAN-BUS network connection
DDC CCI/DDC (rear view)

34

4

1 RT__ Link + DDC/CCI conguration

Figure4.5 CAN-BUS connection for systems with one unit

Electrical installer

A terminal node connection to CCI/DDC
B CAN-BUS cable (not supplied - see table)
C terminal node on last unit (prewired)

QEG group electrical panel
E CCI/DDC
3 last unit of appliance (with "ID00")

Installation, use and maintenance manual – RT__ Link

35

Electrical installer

2 RT__ Links + DDC/CCI conguration

Figure4.6 Example of CAN network with 7 nodes (1 CCI/DDC + 2 appliances connected on a single hydraulic circuit).

4

36

A terminal node connection to CCI/DDC
B CAN-BUS cable (not supplied - see table)
C terminal node on last unit (prewired)
QEG1 rst appliance group electrical panel

QEG2 second appliance group electrical panel
E CCI/DDC
F CAN-BUS cable (not supplied - see table)
3 last unit of appliance (with "ID00")

4

Electrical installer

4.5 WATER CIRCULATION PUMPS

In RT__ Links with circulating pumps, the individual independ­ent circulating pumps (1 or 2 for each GAHP/GA/AY module) are
already mounted and pre-wired on the preassembled group.

In RT__ Links without circulating pumps, electrical connections
must be made (both for power supply and control) of the com­mon water circulation pump of the primary water circuit, as
shown in the diagrams Figures 4.7

p.37

, 4.8

p.38

.

Common circulation pump of a RT__ Link SC

Figure4.7 Electrical connection of single- or three-phase circulator directly controlled by the group (congurations "without circulators")

PM primary system water circulator (not supplied)
QP circulator electrical panel (external)
QEG preassembled group electrical panel
N/L neutral/phase single-phase circulation pump power supply
RST three-phase circulator power supply phases
IP circulating pump disconnector (not supplied)

Installation, use and maintenance manual – RT__ Link

F appropriate fuse for protecting the circulating pump used
KQ appropriate motor protection switch for the circulating pump used
KP NO relay for controlling the circulating pump (not supplied)
K1-K2 24 Vac coil terminals for the common circulating pump request of the hot/

cold link circuit

37

Electrical installer

Figure4.8 Heat recovery exchanger: electrical connection of single- or three-phase circulator directly controlled by the group (congurations "with-

out circulators")

4

38

PM primary system water circulator (not supplied)
QP circulator electrical panel (external)
QEG preassembled group electrical panel
N/L neutral/phase single-phase circulation pump power supply
RST three-phase circulator power supply phases
IP circulating pump disconnector (not supplied)

How to connect the common circulation pump

To connect the common circulation pump (single-phase
or three-phase) of a RT__ Link without any circulating
pumps tted on (Figure 4.7

1. Access the terminal blocks in the Electrical Panel of the

group (Paragraph 4.2

2. Connect the two enable conductors to the appropriate

terminals K1-K2 or 1-2.

3. Made the connections, reposition the blind panel and

reclose the Electrical Panel.

p.31

p.37

).

or 4.8

p.38

)

F appropriate fuse for protecting the circulating pump used
KQ appropriate motor protection switch for the circulating pump used
KP NO relay for controlling the circulating pump (not supplied)
1-2 24 Vac coil terminals for the common circulating pump request of the heat

recovery circuit of link with HR

6

5 FIRST START-UP

Normal operation

First start-up entails checking/setting up the combus­tion parameters and may exclusively be carried out by a
Robur TAC. NEITHER the user NOR the installation tech­nician is authorised to perform such operations, under
penalty of voiding the warranty.

5.1 PRELIMINARY CHECKS

Preliminary checks for First start-up

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

▶

Water, 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 preassembled group is designed
(natural gas or LPG).

▶

Supply gas pressure corresponding to the required values,
with a tolerance of max ± 15%.

▶

Correct operation of the ue exhaust duct.

▶

Power supply mains corresponding to group nameplate da­ta.

▶

Appliance correctly installed, according to the manufactur­er's instructions.

▶

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

Abnormal or hazardous installation situations

If abnormal or hazardous planting situations are found, the TAC
will not run the First start-up and the preassembled group shall
not be commissioned.
These situations may be:

▶

outdoor aerothermal RT__ Link installed within a room;

▶

failed compliance with minimum clearances;

▶

insucient distance from combustible or ammable mate­rials;

▶

conditions that do not warrant access and maintenance op­erations in safety;

▶

starting/stopping the group with the main switch, rather
than with the provided control device (DDC or CCP/CCI);

▶

defects or faults in the preassembled group 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, rst 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 preassembled group carefully read the
warnings in Chapter III.1
formation on regulations and on safety.

First start-up by TAC

First start-up may exclusively be carried out by a Robur
TAC (Chapter 5

p.39

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.1
the appliances 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 or
CCP/CCI).

p. 4

, providing important in-

).

p. 4

), since

Do not switch on/o with the power supply switch

Do not turn the preassembled group on/o with the
power switch. It may be harmful and dangerous for
group appliances and system components. If you need
to connect/disconnect the power supply, see Paragraph

7.1

p.40

.

Inspections before switching on

Before turning on the preassembled group check:
 gas valve open;
 preassembled group electrical power (main switch (GS)

ON);
 DDC or CCI power supply (through transformer);
 water circuit ready.

How to switch on/o

To turn on/o the RT__ Link see the Manual of the connected
control device (DDC or CCP/CCI).
Once switched on with the control device (DDC or CCP/CCI),
under normal operating conditions, the group appliances start/
stop automatically according to the heating and/or cooling re­quirements, providing hot/chilled water at the programmed
temperature.

It is not said that group appliances will activate imme-

diately, but will only start when there are actual heat or

cool demands.

Installation, use and maintenance manual – RT__ Link

39

Maintenance

7

6.3 MESSAGES ON THE DISPLAY

4 digit display on GAHP/GA/AY modules

The S61/AY10 electronic boards on the GAHP/GA/AY modules,
which are part of the group, are equipped with a 4-digit display,
visible through the front panel of the respective appliances.

Signals in normal operation

On the display of each appliance of the group:

▶

When supplying voltage to the group all the LED light up
for 3 sec, then the name of the S61/AY10 electronic board
appears. After about 15 sec. the group appliances are ready
to operate.

▶

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 case of anomaly to one (or more) appliance(s), the relative dis­play(s) ashes indicating an operating code (rst letter on the
display: "E" = error, or "U" = warning). Simultaneously, the rel­ative display of the connected command ashes (DDC or CCI).

▶

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

▶

If it is a permanent error or warning the appliance stops.

6.4 ELECTRONIC ADJUSTMENT ON THE

APPLIANCE  MENUS AND PARAMETERS

Electronic boards on the appliances

For the instructions on the S61/AY10 electronic boards on the
individual GAHP/GA/AY making up the group, refer to the re­spective GAHP/GA/AY Manuals (attached).

DDC or CCP/CCI control devices

For information on DDC or CCP/CCI control devices, see the re­spective manuals.

device (DDC or CCP/CCI). For instructions, see the control device
Manual.

Modify the settings of circulators

See Appendix 9.2

p.49

.

6.6 HOW TO RESTART THE LOCKEDDOWN

APPLIANCES

Fault signals on the displays

If one (or more) appliance(s) is/are blocked, an operating code
ashes on its/their respective display(s) (rst green digit on the
left, letter "U" = warning or "E" = error) , and the display of the
connected control device (DDC or CCP/CCI) ashes too

▶

To restart the appliance(s) you need to know and perform
the procedure for the problem reported and identied by
the code.

▶

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 for a fault at
the appliance(s) or a problem with the system.

▶

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

▶

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

Reset

To perform a reset procedure (eg code 412 for the ame control­ler lockout), there are two possibilities:
(1) Act on the connected control device (DDC or CCP/CCI). For
instructions, see the device Manual.
(2) Operate on the electronic board of the appliance (S61/AY10),
as described in the relevant manual.

6.5 MODIFYING SETTINGS

Modify the settings through the DDC or CCP/CCI

To change the RT__ Link settings, use the connected control

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 the internal components of the GAHP/
GA/AY modules that make up the RT__ Link may exclu­sively be performed by the TAC.

6.7 CIRCULATORS LOCKOUT

See Appendix 9.2

Before performing any operation: turn o the preassem­bled unit by means of the control device (DDC or CCP/
CCI) and wait for the end of the shutdown cycle of all the
units; stop the gas supply by acting on its tap; disconnect
the power supply as described in the Paragraph 

Environmental or operational heavy conditions

In environmental or operational conditions particularly
heavy (for example: heavy-duty use of the appliance,
salty environment, etc.), maintenance and cleaning op­erations must be more frequent.

p.49

.

p.41

.

40

7

Maintenance

Preassembled group electrical connection and
disconnection operations

investigate and resolve the problem before going to the

next step.

2. (4'.) Insert the remaining single-phase automatic break-

A) Electrical connection

The electrical connection must take place by doing the follow­ing sequence of operations:

1. Insert any switches/disconnectors located upstream of the

three-phase supply line of the preassembled group

2. Insert the 4-pole switch in the preassembled group electrical

panel

3. Insert the single-phase (magnetothermic) breakers of each

unit, located in the preassembled group electrical panel

In the case of commissioning (rst start-up), replace step
3 with the following steps:

1. (3 '.) Insert ONLY ONE of the single-phase automatic

(magnetothermic) breakers of the units located in the
preassembled group electrical panel, and verify that
the corresponding unit is actually powered; otherwise,

ers of the units.

B) Electrical disconnection

The electrical disconnection must take place by doing the fol­lowing sequence of operations:

1. Open the single-phase automatic (magnetothermic) break-

ers of each unit, located in the preassembled group electri­cal panel

2. Open the 4-pole switch in the preassembled group electrical

panel

3. If required, open any switches/disconnectors located up-

stream of the three-phase supply line of the preassembled
group

For the maintenance of the individual GAHP/GA/AY

modules belonging to the preassembled group, consult

their respective Manuals (attached).

7.2 PREEMPTIVE MAINTENANCE

Recommended maintenance

▶

For pre-emptive maintenance, comply with the

recommendations in Table 7.1

Table7.1

GAHP A GAHP GS/WS AY00-120 GA ACF GAHP-AR

Guidelines for the preventive maintenance operations

visually check of the general condition of the unit and of its nned coil √ (1) - - √ (1) √ (1)
check the correct operation of the device used for monitoring the water
ow
check the % value of CO
check gas pressure to the burners - - - √ √

Check of the unit

Check for every
DDC or CCI

(1) It is suggested to clean the nned coil once every 4 years (optimal frequency of the cleaning operation is in any case strongly aected by the installation site). Avoid excessively aggressive

cleaning of the nned coil (e.g. high-pressure washer).

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 that the plant is able to achieve the setpoint temperature √ √ √ √ √
download the event history √ √ √ √ √

2

√ √ √ √ √

√ √ √ - -

√ √ √ - -

- - √ - -

p.41

.

7.3 SCHEDULED ROUTINE MAINTENANCE

Maintenance every 2 years

▶

For scheduled routine maintenance, perform the operations

Table7.2

Ordinary scheduled maintenance

clean the combustion chamber √ (1) √ (1) √ √ √ (1)
clean the burner √ (1) √ (1) √ √ √ (1)

Check of the unit

(1) Only in case the analysis of combustion products is non-compliant.

clean the ignition and ame sensor electrodes √ √ √ √ √
check that the condensate discharge is clean √ √ √ - ­replace the silicone gasket between the front plate and the exchanger - - √ - -

Installation, use and maintenance manual – RT__ Link

in Table 7.2

p.41

, at least once every 2 years.

GAHP A GAHP GS/WS AY00-120 GA ACF GAHP-AR

41

Diagnostics

8

7.4 PERIODS OF INACTIVITY

Avoid emptying the installation

Emptying the system can cause damage to the hydraulic pipes,
for oxidation or corrosion.

Deactivate the group in winter

If you intend to stop the preassembled group during the winter,
ensure at least one of the following two conditions:

1. antifreeze function active (Paragraph 3.4

2. sucient antifreeze glycol (Paragraph 3.5

Prolonged periods of inactivity

▶

If you plan to leave the preassembled group idle for a long
time, disconnect it from the electrical and gas supply mains.
These operations must be performed by qualied personnel.

How to disable the group for long periods

1. Turn o the group using the connected (DDC or CCP/

CCI) control device (Paragraph 6.2

2. Only when all the appliances of the grup are completely

powered o, disconnect the power supply as described

p.39

p.27

p.27

).

);

).

in Paragraph 7.1

3. Close the gas valve.

How to reactivate the group after long periods of in­activity

Prior to reactivating the group, the manager/maintainer
of the system must rst:

 Check whether any maintenance operations are re-

quired (contact the TAC; see Paragraphs 7.2

7.3

p.41

).

 Check content and quality of the water in the system, and

if necessary top it up (Paragraphs 3.7
and 3.5

p.27

 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 valve and ensure there are no leaks; should

gas smell be noticed, close the gas valve again, do not
switch any electrical devices on and request intervention
by qualied personnel.

2. Connect the electrical power supply as described in Par-

agraph 7.1

3. Turn on the preassembled group using the provided

control device (DDC or CCP/CCI, Paragraph 4.4

).

p.40

p.40

.

.

p.41

and

p. 28

, 3.6

p. 28

p.33

).

8 DIAGNOSTICS

8.1 APPLIANCES/CONTROLLERS

Refer to the operating codes tables in the Manuals of the individ­ual units or in the DDC/CCI/CCP controls Manuals (attachments)
for diagnostic.

8.2 CIRCULATING PUMPS

See Appendix 9.2

p.49

.

42

9

9 APPENDICES

9.1 WIRING DIAGRAMS AND INTERNAL WIRINGS

Figure9.1 Diagram 1

TR

I1

U1

M9

Appendices

2A

U2

I1

S0 (fase0)

I2

N0

I2

1A

M1

N0

T0 (fase0)

230Vac

M2

24Vac

U0

U3

CAN

M

N0-M2

F0-M2

4A

N0

R0

N0

I6

AT

F0-TA

F0-M2

N
R

UNIT 6

N
S

S0

N0

I5

UNIT 5

CHR

N

PE

T

UNIT 4

N
R

N
S

UNIT 2 UNIT 3

NT

UNIT 1

N0

T0

S0

R0

R H

K2

U3

K1

12

CF

11

CF

10

CF

9

CF

8

CF

7

CF

6

U2

4 5

2 3

CF CF CF CF CF

1

CF

N

NT

T

S

S

R

R

AE

T0

N0

R0

N0

S0

I4

I3

I2

N0

T0

I1

AE power supply input terminals
AT antifreeze thermostat
CAN 3-pole connector for CAN-BUS network connection
CHR condensation heating resistance
I1 "ID00" unit magnetothermic breaker
I2 "ID01" unit magnetothermic breaker
I3 "ID02" unit magnetothermic breaker
I4 "ID03" unit magnetothermic breaker
I5 "ID04" unit magnetothermic breaker

Installation, use and maintenance manual – RT__ Link

I6 "ID05" unit magnetothermic breaker
IG Group electrical panel (QEG) switch disconnector
M 2-pole 24 Vac connector for service uses
M1 transformer primary fuse
M2 condensate heating resistance protection fuse
M9 transformer secondary fuse
PE earth conductor
TR transformer 230/24 Vac

43

Appendices

IEP

Figure9.2 Diagram 2

9

I1

S0 (fase0)

I2

N0

I1

I2

230Vac

1A

M1

N0

T0 (fase0)

TR

M2

24Vac

N0-M2

F0-M2

4A

SCH

ID: 04

N.O.

0
YR
W

CONTACT

H

2A

U1

U0

M9

U2

U3

B

L

GND

CAN

M

SCH

SCH

SCH

SCH

ID: 03

N.O.

ID: 02

N.O.

ID: 01

N.O.

ID: 00

N.O.

0
YR
W

CONTACT

0
YR
W

CONTACT

0
YR
W

CONTACT

0
YR
W

CONTACT

H

L

GND

F0-TA

AT

F0-M2

H

L

B

N0

S0

I5

N0

T0

I4

N0

R0

I3

N0

S0

I2

N0

T0

I1

PE

N
S

UNIT 5

N
T

UNIT 4

N
R

N
S

UNIT 2 UNIT 3

NT

UNIT 1

N0

T0

S0

R0

IG

R H R H
H
R

N

T

T N

S

S

R

R

AE

A

GND

H

L

GND

H

L

GND

44

See the Figure 9.1

p.43

legend.
IEP Interior of the electrical panel
A CLOSED jumpers (from factory): keep CLOSED only if ID00 is a TERMINAL

node on the CAN network
B Open Jumpers (from factory): not to touch
Note on the position of jumpers A:
If ID00 is an intermediate node:

• the electric installer must OPEN ID00 unit jumpers

• the TAC must reset from the board, to progression, the enumeration of the
board ID of all units;

• on appliances with 2 units, only ID00 + ID01 units will be present (with
jumpers predened as in the example)

• on appliances with 3 units, only ID00 + ID01 + ID02 units will be present
(with jumpers predened as in the example)

• on appliances with 4 units, only ID00 + ID01 + ID02 + ID03 units will be
present (with jumpers predened as in the example)

9

IEP

~~ ~~ ~~ ~~ ~~

Figure9.3 Diagram 3

I1

I2

I1

I2

N0

T0 (fase0)

R0 (fase0)

N0

1A

M1

Appendices

N

2A

TR

U1

24Vac

230Vac

U0

M9

U2

U3

B

CAN

T

KPs

T

KPt

B

M2

4A

N0

S0

N0

N0-M2

F0-M2

T0

M

F0-TA

AT

F0-M2

R H

T2

N5

No

Com

N
S

I5

I4

Nc

No

Com

N

T

Nc

T1

H
L

L N

230V

PUMP

SCH

ID: 04

N.O.

CONTACT

H
L

L N

230V

PUMP

SCH

ID: 03

N.O.

CONTACT

H
L

L N

230V

PUMP

SCH

ID: 02

N.O.

CONTACT

N3 N4

N0

R0

N0

S0

I2 I3

N1 N2

N0

T0

I1

PE

No

N

S

Com

R

Nc

No

Com

N

Nc

No

Com

NT

Nc

I

I1

N0

N

T

T0

S0

R0

IG

T N

S

S

R

R

AE

A

H
L

GND GND GND GND

L N

230V

PUMP

SCH

ID: 01

N.O.

CONTACT

H
L

GND

L N

230V

PUMP

SCH

ID: 00

N.O.

CONTACT

TER

L

R N

KPKPKPKP

A2

A1

4 N L

3

N

MA

2

1

TER

KP

A2

A1

4 N L

3

MA

N

2

1

TER

A2

A1

4 N L

3

MA

N

2

1

TER

A2

A1

4 N L

3

MA

N

2

1

TER

A2

A1

4 N L

3

MA

N

2

1

INT. I5

05

PM

05

PMR

N

L

S N

INT. I4

04

PM

04

PMR

N

L

S N

INT. I3

03

PM

03

PMR

N

L

T N

INT. I2

02

PM

02

PMR

N

L

T N

INT. I1

01

PM

01

PMR

See the Figure 9.2

p.44

legend.
KPt Thermostat with setpoint calibration of DHW tank (not supplied)
KPs Thermostat calibrated at 35 °C with capillary tube in the lower part of the

DHW tank (not supplied) [to be provided in the event the water ow rate
on the recovery circuit exceeds the nominal value of 1000 l/h]

MA unit terminal block

Installation, use and maintenance manual – RT__ Link

PM Water pump < 700 W
PMR Recovery exchanger pump
TER Power supply terminal block 230 Vac
NOTE if there are no ACF 60-00 HR units in the preassembled group, the T1-T2

terminals must be jumpered.

45

Appendices

INT. I5

INT. I4

INT. I3

INT. I1

INT. I2

IEP

Figure9.4 Diagram 4

I1

I2

I1

I2

1A

M1

N0

N0

T0 (fase0)

R0 (fase0)

9

N

2A

TR

U1

24Vac

230Vac

U0

M9

U2

U3

CAN

H
L
GND

B

H

L

L NL N

230V

PUMP

SCH

ID: 04

N.O.

CONTACT

M

H

L

GND GND

230V

PUMP

SCH

ID: 03

N.O.

CONTACT

M2

4A

N0-M2

F0-M2

F0-TA

KPs

T

KPt

T

AT

F0-M2

TER

L

KP

A2

A1

MA

TER

KP

A2

A1

MA

S N

4 N L

3

N

2

1

N

L

T N

4 N L

3

N

2

1

IG

U4

T2

T1

2
1

10

CP

9

CP

8

CP

7

CP

6

CP

5

CP

4

CP

3

CP

2

1

CP CP

R H

K2
K1

10

CF

9

CF

8

CF

7

CF

6

4 5

2 3

CF CF CF CF CF

1

CF

N

NT

T

S

S

R

R

B

A

AE

H

L

GND

H

L

GND

H

L

GND

SCH

SCH

SCH

ID: 02

N.O.

ID: 01

N.O.

ID: 00

N.O.

CONTACT

CONTACT

CONTACT

0
YR
W

0
YR
W

0
YR
W

N0

S0

N0

T0

N0

R0

N0

S0

N0

T0

N
S

UNIT 5

I5

N
T

I4

UNIT 4

N
R

I3

N
S

I2

UNIT 2 UNIT 3

NT

I1

UNIT 1

N0

T0

S0

R0

PE

TER

TER

TER

N

L

R N

4 N L

3

N

2

1

N

L

S N

4 N L

3

N

2

1

N

L

T N

4 N L

3

N

2

1

46

See the Figure 9.3

p.45

legend.

9

IEP

~

~

~

~

~

~

~

~

Figure9.5 Diagram 5

Appendices

See the Figure 9.3

p.45

I1

T0 (fase0)

legend.

CONTACT

NO

2A

TR

I1

I2

I2

U1

24Vac

230Vac

U0

1A

M1

N0

N0

N0-M2

F0-M2

4A

M2

R0 (fase0)

N0

S0

N0

S0

N0

T0

N0

R0

N0

S0

N0

T0

M9

U2

U3

F0-TA

AT

F0-M2

N
R

I6

N
S

I5

No

N
T

I4

N3 N4

I2 I3

N1 N2

I1

PE

Nc

No

N
R

Nc

No

N
S

Nc

No

NT

Nc

I1

N0

T0

S0

R0

CAN

H
L
GND

M

T

KPs

T

KPt

B B

H

R

T2
T1

Com

Com

B

Com

Com

I

N

T

T N

S

S

R

R

IG

AE

A

H

L

SCH

SCH

SCH

SCH

SCH

ID: 03

ID: 02

ID: 01

ID: 00

NO

PUMP

PUMP

PUMP

PUMP

ID: 05

CONTACT

SCH

ID: 04

A1

L N

230V

N.O.

CONTACT

A1

L N

230V

N.O.

CONTACT

A1

L N

230V

N.O.

CONTACT

A1

L N

230V

N.O.

CONTACT

GND

H

L

GND

H

L

H

L

H

L

GND GND GND

H

L

GND

N

L

R N

INT. I6

TER

TER

TER

KP

A2

MA

TER

KPKPKP

A2

MA

TER

A2

MA

TER

A2

MA

~

06

PM

N

L

S N

INT. I5

~

05

PM

N

L

T N

INT. I4

04

PM

4 N L

3

N

2

1

4 N L

3

N

2

1

4 N L

3

N

2

1

4 N L

3

N

2

1

04

PMR

N

L

R N

INT. I3

03

PM

03

PMR

N

S N

L

INT. I2

02

PM

02

PMR

N

L

T N

INT. I1

01

PM

01

PMR

Installation, use and maintenance manual – RT__ Link

47

Appendices

IEP2 IEP1

Figure9.6 Diagram 6

9

B

SCH

ID: XX

N.O.

CONTACT

0
Y
W

R

H

L

GND

H
L

GND

CAN

M

B

NT

S

R

NT

S

R

H

L

GND

SCH

ID: XX

N.O.

CONTACT

0
Y
W

R

AE

B

SCH

ID: XX

N.O.

CONTACT

0
Y
W

R

H
L

GND

H
L

GND

CAN

M

A

SCH

ID: XX

N.O.

CONTACT

0
Y
W

R

H
L

GND

NT

S

R

AE

48

See the Figure 9.2

p.44

legend.

IEP Interior of the electrical panel

RSTN phases/neutral

9

Appendices

9.2 CIRCULATING PUMPS

To access the circulating pumps, remove the plastic cover (for GAHP/GA, Figure 1.14
120 units (Figure 1.15

p.19

).

Table9.1 Wilo Yonos pump block signalings

Code Fault Cause Remedial action

E04 Insucient mains voltage Supply voltage too low on the mains side Check that power supply voltage is correct.
E05 Excessive mains voltage Supply voltage too high on the mains side Check that power supply voltage is correct.

E09 (1) Turbine operation

E10 Locking The rotor is locked Ask for TAC intervention.
E21 (2) Overload The motor runs with diculty Ask for TAC intervention.
E23 Short circuit Motor current too high Ask for TAC intervention.
E25 Contact/winding Defective motor winding Ask for TAC intervention.

E30

E31

E36 Electronic system error Defective electronic system Ask for TAC intervention.

1 Only for pumps with P1 ≥ 200 W.
2 In addition to the LED indicator, the fault LED turns red with xed light. See also message E21.

Over temperature of the
module
Power module overtemper­ature

The pump is driven backwards (pump ow from the deliv­ery side to the suction side)

Module inside vane too hot

Ambient temperature too high

Table9.2 Wilo Yonos pump warning messages

Code Fault Cause Remedies

E07 Turbine operation With the pump o the impeller remains in operation Check the ow rate. If necessary, t the check valves.
E11 Dry operation Air in the pump Check the amount/pressure of the water.
E21 (1) Overload The motor runs with diculty Ask for TAC intervention.

p.19

), or remove the front panel of the AY00-

Check the ow rate. If necessary, t the check valves.

Improve ventilation of the environment, check the con­ditions of use. If necessary, ask for TAC intervention.
Improve ventilation of the environment, check the con­ditions of use. If necessary, ask for TAC intervention.

1 See also blocking signal E21.

Installation, use and maintenance manual – RT__ Link

49

Robur mission

20/03/2019

Robur is dedicated to dynamic progression
in research, development and promotion
of safe, environmentally-friendly, energy-eciency products,
through the commitment and caring
of its employees and partners.

19MCMSDC009

Code: D-LBR563

Revision: F

Robur S.p.A.
advanced technologies
for climate conditioning
via Parigi 4/6
24040 Verdellino/Zingonia (BG) Italy
[phone] - F [phone]
www.robur.it [e-mail]