Robur GA ACF HT User manual

Installation, use and maintenance manual
powered by gas and renewable energy
Modular heating unit and heater/chiller
Preassembled groups

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.
Revision: J
Code: D-LBR563
DISPOSAL
The appliance and all its accessories must be disposed of separately in accordance with the regulations in force.
Use of theWEEE symbol (Waste Electrical and Electronic Equipment) indicates that this product cannot be disposed of as house-
hold waste. Proper disposal of this product helps to prevent potential negative consequences for the environment and human
health.

Installation, use and maintenance manual – RT__ Link 3
I Introduction.......................................................................... p.4
I.1 Recipients................................................................ p.4
I.2 Control device ....................................................... p.4
II Symbols and denitions......................................... p.4
II.1 Key to symbols ...................................................... p.4
II.2 Terms and denitions ......................................... p.4
III Warnings................................................................................... p.4
III.1 General and safety warnings............................ p.4
III.2 Compliance............................................................. p.6
III.3 Exclusions of liability and warranty ............... p.6
1 Features and technical data................................ p.7
1.1 Features.................................................................... p.7
1.2 Circulating pumps................................................ p.7
1.3 Coding...................................................................... p.7
1.4 Dimensions and weights................................. p.10
1.5 Roma valve............................................................ p.20
1.6 Independent circulators selector switch
settings................................................................... p.21
1.7 Electrical specications.................................... p.22
1.8 Electronic boards................................................ p.22
1.9 Operation mode ................................................. p.22
1.10 Controls.................................................................. p.22
1.11 Technical data...................................................... p.23
2 Transport and positioning.................................. p.23
2.1 Warnings................................................................ p.23
2.2 Handling................................................................ p.23
2.3 Group positioning.............................................. p.23
2.4 Minimum clearance distances....................... p.24
2.5 Mounting base.................................................... p.24
3 Heating engineer........................................................... p.25
3.1 Warnings................................................................ p.25
3.2 Hydraulic system ................................................ p.25
3.3 Hydraulic connections...................................... p.25
3.4 Antifreeze function............................................ p.29
3.5 Antifreeze liquid.................................................. p.29
3.6 System water quality......................................... p.30
3.7 System lling........................................................ p.30
3.8 Fuel gas supply.................................................... p.31
3.9 Combustion products exhaust...................... p.32
3.10 Flue gas condensate discharge..................... p.33
3.11 Defrosting water drainage.............................. p.33
3.12 Safety valve drain............................................... p.33
4 Electrical installer......................................................... p.33
4.1 Warnings................................................................ p.33
4.2 Electrical systems ............................................... p.34
4.3 Electrical power supply.................................... p.34
4.4 Adjustment and control................................... p.35
4.5 Water circulation pumps.................................. p.39
5 First start-up....................................................................... p.40
5.1 Preliminary checks............................................. p.40
5.2 Electronic adjustment on the appliance –
Menus and parameters .................................... p.41
5.3 Modifying settings............................................. p.41
6 Normal operation......................................................... p.41
6.1 Warnings................................................................ p.41
6.2 Switch on and o................................................ p.41
6.3 Modifying settings............................................. p.42
6.4 Eciency ............................................................... p.42
7 Maintenance....................................................................... p.42
7.1 Warnings................................................................ p.42
7.2 Pre-emptive maintenance .............................. p.43
7.3 Scheduled routine maintenance.................. p.43
7.4 Messages on the display.................................. p.43
7.5 Restarting a locked-out unit........................... p.44
7.6 Circulators lockout............................................. p.44
7.7 Periods of inactivity........................................... p.44
8 Diagnostics........................................................................... p.45
8.1 Appliances/controllers ..................................... p.45
8.2 Circulating pumps.............................................. p.45
9 Appendices........................................................................... p.46
9.1 Wiring diagrams and internal wirings......... p.46
9.2 Circulating pumps.............................................. p.52
INDEX OF CONTENTS

Introduction
4
I
I INTRODUCTION
Installation, use and maintenance manual
This Manual is an integral part of the RT__ Link and
must be handed to the end user together with the
appliance.
I.1 RECIPIENTS
This Manual is intended for:
▶ End user, for appropriate and safe use of the appliance.
▶ Qualied installer, for correct appliance installation.
▶ Planner, for specic information on the appliance.
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.
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 = equiva-
lent 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.
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
adjustment device to control one or more Robur applianc-
es (GAHP heat pumps, GA chillers and AY00-120 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
groupconsistingofGAHP/GA/AYmodules (seede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 op-
eration 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 the air
Switching the appliances o
Installer's qualications
Installation must exclusively be performed by a
qualied rm and by qualied personnel, with
specic knowledge on heating, cooling, electrical

Warnings
Installation, use and maintenance manual – RT__ Link 5
III
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 manu-
facturer's instructions/provisions.
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
conditions 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
personnel.
In case of danger, switch o the electrical power
and gas supplies only if this can be done in total
safety.
Do not entrust children, persons with physical,
sensory or mental disabilities or persons with poor
knowledge and experience with use of the preas-
sembled appliance.
Gas component tightness
Before performing any operation on gas ducting
components, close the gas valve.
Upon completing any procedure, perform the
tightness test according to regulations in force.
Gas smell
If you smell gas:
Do not operate electrical devices near the preas-
sembled group (eg telephones, multimeters or
other appliances that can cause sparks).
Shut o the gas supply by turning the valve o.
Switch o the power supply via the external dis-
connect switch in the power supply electrical pan-
el.
Ask for qualied personnel from a phone away
from the preassembled group.
Electrocution hazard
Within the preassembled group (and the applianc-
es that compose it) there are live parts.
Disconnect the electrical power supply before any
operation on appliance components.
For electrical connections exclusively use compli-
ant components and according to the specica-
tions provided by the manufacturer.
Make sure the preassembled group and the indi-
vidual GAHP/GA/AY modules of the same can not
be reactivated inadvertently.
Connection and disconnection
For the RT__ Link electrical connection and discon-
nection operations follow the procedure described
in Paragraph 7.1 p.42 .
Earthing
Electrical safety depends on an eective earthing
system, properly connected to the preassembled
group and executed in accordance with current
regulations.
Distance from combustible or ammable mate-
rials
Do not deposit ammable materials (paper, dilu-
ents, paints, etc.) near the preassembled group.
Acid ue gas condensate
If condensing units are present in the preassem-
bled group:
Discharge the acid condensate of combustion ue
gas, as indicated in Paragraph 3.10 p.33 , in com-
pliance with current exhaust regulations.
Shutting down the preassembled group
Interrupting the power supply during the opera-
tion of the preassembled group may cause perma-
nent damage to the internal components.
Except for a hazard, do not interrupt the power
supply to turn o the preassembled group, but al-
ways and exclusively use the provided control de-
vice (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 spare 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.
Routine maintenance
Proper maintenance ensures the eciency and
good operation of the preassembled group over
time.
Maintenance must be performed according to the
manufacturer's instructions (see Chapter 7 p. 42 )

Warnings
6
III
and in compliance with current regulations.
Appliance maintenance and repairs may only be
entrusted to rms legally authorised to work on
gas appliances and systems.
Enter into a maintenance contract with an author-
ised 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 individ-
ual GAHP/GA/AY appliances/modules are to be
dismantled, please contact the manufacturer for
disposal.
Keep the Manual
This Installation, use and maintenance manual,
including all attached documents, must always
accompany the preassembled group and must be
handed to the new owner or installer in the event
of sale or transfer.
III.2 COMPLIANCE
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 stand-
ards and directives, each as applicable:
▶ Eciency Directive 92/42/EEC and subsequent modi-
cations and additions.
▶ 2016/426/EU "Gas Appliances Regulation" as amend-
ed 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 add-
ed.
▶ 2014/68/EU "Pressure Equipment Directive" as amend-
ed and added.
▶ 811/2013/EU "Energy-Related Products regulation" as
amended and added.
▶ 813/2013/EU "Ecodesign requirements regulation" as
amended and added.
▶ EN 12309 appliances for gas-red heating and/or cool-
ing absorption.
▶ 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 cur-
rent applicable regulations, depending on the Country
and location, and in accordance with the manufacturer's
instructions. In particular, regulations regarding the fol-
lowing 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 manufactur-
er's directions/instructions shall be disclaimed.
In particular, the guarantee of the individual GAHP/
GA/AY modules/units belonging to the preassem-
bled group may be invalidated under the following
conditions:
Incorrect installation.
Misuse.
Failure to comply with the manufacturer's indica-
tions on installation, use and maintenance.
Alteration or modication of the product or any
part thereof.
Extreme operational conditions or however out-
side of the operational ranges set forth by the man-
ufacturer.
Damages caused by external agents such as salts,
chlorine, sulphur or other chemical substances
contained in the installation water or present in the
air of the installation site.
Abnormal actions transmitted to the appliance by
the system or installation (mechanical stresses,
pressure, vibrations, thermal expansion, electrical
surges...).
Accidental damages or due to force majeure.

Features and technical data
Installation, use and maintenance manual – RT__ Link 7
1
1 FEATURES ANDTECHNICAL DATA
For the characteristics of the individual modules (GAHP/
GA/AY units) that make up the RT__ Link, and of the con-
trol devices (DDC, CCP/CCI, ...), refer to the respective
Manuals (attached).
1.1 FEATURES
Preassembled groups
The RT__ Link are gas powered (natural gas or LPG) heat-
ing/cooling sets, to supply hot and/or chilled water. Each
group consists of a certain number of individual gas pow-
ered modules/heating/cooling appliances (GAHP/GA/AY
units).The set of appliances and components is preassem-
bled at the factory, forming a complete hydronic group al-
ready predisposed to be simply connected to the system.
Application
Each preassembled group according to its conguration
(RTAR, RTCF, RTY, RTAY, RTYR, RTA, ... Link) is able to simul-
taneously 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 power. The various hydronic
models (RTAR, RTCF, ... Link) are suitable for all heating and
cooling systems operating with hot and/or chilled water,
with common terminals (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 gas powered
GAHP/GA/AY heating/cooling modules/units, is com-
posed of:
▶ delivery/return stainless steel hydraulic manifolds, in-
sulated with rigid cups lined with aluminum sheet
▶ galvanized steel gas outlet manifold
▶ exible connecting couplings of individual units to hy-
draulic 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
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
▶ GA units, ACF/HR/TK/LB 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 exclu-
sively outside, while others may be installed either in-
doors or outdoors.
The aerothermal modules of RT__ Links may be in
conguration:
▶ with standard fans
▶ with silenced fans (S or S1)
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 hy-
draulic collectors/connections for hot and/or cold wa-
ter, 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. 20 ), 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 1.1 p. 7 provides the minimum residual head at
the nominal ow in the largest conguration.
Table1.1Minimum residual head
residual head [m w.c.]
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.
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,

Features and technical data
8
1
RTY, ...), based on composing modules (GAHP A/AR/
WS/GS, GA ACF/HR/TK/LB, AY00-120)
2. (2 or 3 digits) = cooling power, given by the sum of the
cooling 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, i.e. delivery/return man-
ifold pairs (1, 2 or 3)
5. (2 letters) = modules type
6. (_, S, S1) = standard or silenced fans (only for aerother-
mal units)
7. (MET/NAT, G25, GPL/LPG) = fuel gas (natural gas or
LPG)
8. (2 or 3 letters) = country
9. (2 letters) circulators (with or without) and type (stand-
ard or oversize)
10.(1 letter) predispositions, if any
The 1.1 p. 9 table/gure exemplies the meaning of
the encoding in detail, providing the key for reading any
possible composition and conguration, starting from an
example.

Features and technical data
Installation, use and maintenance manual – RT__ Link 9
1
Figure1.1

Features and technical data
10
1
1.4 DIMENSIONS AND WEIGHTS
The dimensions are given for the maximum foot-
print conguration.
The weights are given for the maximum weight
conguration.
Hydraulic/gas connections
Figure1.2Position of water, gas and condensate discharge
connections, for 2 pipes groups - Right side view
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
132
255
378
623
1245
1400(*)
1562
1745
D
C
B
A
Figure1.3Position of water, gas and condensate discharge
connections, for 4 pipes groups - Right side view
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
132
255
378 245
245623
868 245
1113 132
1245
D
C
B
A
EF
1400(*)
1562
1745

Features and technical data
Installation, use and maintenance manual – RT__ Link 11
1
Figure1.4Position of water, gas and condensate discharge connections, for 6 pipes groups - Top view
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]
245245
1245
245378
255
E
F
245
245
245
378
255
132
D
C
A B
H
G
D
C
AB
132
132
Figure1.5Position of water, gas and condensate connections for RTGS/WS groups - Right side view
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]
1576
1400
132
255
634
961
1106
1245
520
CD
F
E
BA

Features and technical data
12
1
Figure1.6Dimensions and weights of ACF/A/AR preassembled group (with 2, 3, 4 and 5 units) - front view
A 960 kg
B 1440 kg
C 1920 kg
D 2410 kg
380 1554 380
2314
3610
1554 1554251
251
137 1554 1554 1554
4936
1554 1554 1554
6490
1554
A
B
C
D
137
137137

Features and technical data
Installation, use and maintenance manual – RT__ Link 13
1
Figure1.7Dimensions and weights of AY preassembled group (with 2, 3, 4 and 5 units) - front view
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
1554
1828
QEG QEG
QEG QEG
1554
2314
AC
BD
1554
1828
1554
2314

Features and technical data
14
1
Figure1.8Dimensions and weights of ACF/A/AR + AY preassembled group (with 1+1, 1+2, 1+3, 1+4 units) - front and top view
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
A
B
1554
2314
380 380
137 1554 1554
137
3382
The GAHP/GA + 1 AY00-120 congurations are re-
placed by the Gitié units.

Features and technical data
Installation, use and maintenance manual – RT__ Link 15
1
Figure1.9Dimensions and weights of ACF/A/AR + AY preassembled group (with 1+5, 2+1 and 2+2 units) - front and top view
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
1554251 1554 251
3610
A
1554 137 1554
137
3382
B

Features and technical data
16
1
Figure1.10Dimensions and weights of ACF/A/AR + AY preassembled group (with 2+3, 2+4 and 2+5 units) - front and top view
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
137
1554 1554 1554
137
4936
1554
137
1554
1554
137
4936
A
B

Features and technical data
Installation, use and maintenance manual – RT__ Link 17
1
Figure1.11Dimensions and weights of ACF/A/AR + AY preassembled group (with 3+1, 3+2 and 3+3 units) - front and top view
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
1554
137
1554 1554
137
4936
A
B
137
1554 1554 1554
137
4936

Features and technical data
18
1
Figure1.12Dimensions and weights of ACF/A/AR + AY preassembled group (with 3+4 and 3+5 units) - front and top view
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
1554
137 137
6490
1554 1554 1554
A
B
137
1554 1554 1554 1554
137
6490

Features and technical data
Installation, use and maintenance manual – RT__ Link 19
1
Figure1.13Dimensions and weights of ACF/A/AR + AY preassembled group (with 4+1, 4+2, 4+3 and 4+4 units) - front and top view
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
137
1554 1554 1554 1554
137
6490
137
1554 1554 1554 1554
137
6490
A
B

Features and technical data
20
1
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 detailed in the following Figure
1.14 p. 20 for the GAHP/GA units and in the following
Figure 1.15 p.20 for the AY00-120 units.
Figure1.14Roma valve GAHP/GA units
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
D Roma valve
E Air vent
E Air vent
G Circulator
H Connection to return
manifold
H
E
F
G
D