Robur GA ACF User manual

Installation, use and maintenance manual
gas powered
absorption chiller
GA ACF

This Installation, use and maintenance manual has been drawn up and printed by Robur Corporation; whole or
partial reproduction of this Installation, use and maintenance manual is prohibited.
The original is led at Robur Corporation.
Any use of this Installation, use and maintenance manual other than for personal consultation must be previously
authorised by Robur Corporation.
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 Corporation reserves the right to modify
the data and contents of this Installation, use and maintenance manual without prior notice.
Revision: P
Code: D-LBR323

Installation, use and maintenance manual – GA ACF 3
INDEX OF CONTENTS
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 Conformity ........................................................................ 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 Dimensions ....................................................................... p.7
1.3 Components..................................................................... p.9
1.4 Electrical wiring diagram ........................................... p.12
1.5 Electronic boards .......................................................... p.12
1.6 Controls ............................................................................ p.13
1.7 Technical data ................................................................ p.14
2 Transport and positioning........................................ p.18
2.1 Warnings .......................................................................... p.18
2.2 Handling........................................................................... p.18
2.3 Appliance positioning................................................. p.19
2.4 Minimum clearance distances.................................. p.19
2.5 Mounting base............................................................... p.20
3 System design....................................................................... p.21
3.1 Warnings .......................................................................... p.21
3.2 Hydraulic system........................................................... p.21
3.3 Hydraulic connections ................................................ p.22
3.4 Water circulation pump.............................................. p.22
3.5 Antifreeze function....................................................... p.23
3.6 Antifreeze liquid............................................................ p.23
3.7 System water quality ................................................... p.23
3.8 System lling .................................................................. p.24
3.9 Fuel gas supply .............................................................. p.24
4 Electrical installer.............................................................. p.25
4.1 Warnings .......................................................................... p.25
4.2 Electrical systems.......................................................... p.25
4.3 Electrical power supply............................................... p.25
4.4 Set-up and control........................................................ p.26
4.5 Water circulation pump.............................................. p.29
4.6 With more than one GA ACF unit............................ p.30
5 First start-up .......................................................................... p.31
5.1 Preliminary checks........................................................ p.31
5.2 First start-up operations............................................. p.31
5.3 Check the static gas mains pressure...................... p.32
5.4 Gas pressure adjustment............................................ p.32
5.5 Gas changeover............................................................. p.33
5.6 Electronic adjustment on the machine – Menus
and parameters of the S61 board ........................... p.33
5.7 Modifying settings........................................................ p.35
6 Normal operation.............................................................. p.36
6.1 Warnings .......................................................................... p.36
6.2 Switch on and o.......................................................... p.36
6.3 Modifying settings........................................................ p.36
6.4 Eciency.......................................................................... p.36
7 Maintenance.......................................................................... p.36
7.1 Warnings .......................................................................... p.36
7.2 Scheduled routine maintenance............................. p.37
7.3 Extraordinary maintenance....................................... p.38
7.4 Messages on the display ............................................ p.38
7.5 Restarting a locked-out unit ..................................... p.38
7.6 Periods of inactivity...................................................... p.39
8 Diagnostics.............................................................................. p.40
8.1 Operative codes............................................................. p.40

Introduction
4
I
I INTRODUCTION
Installation, use and maintenance manual
This Manual is an integral part of the GA ACF unit 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 GA ACF unit needs a control de-
vice (DDC or external request), 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
GA Appliance/Unit = equivalent terms, both used to designate
the GA Gas Absorption chiller.
AT = Robur Authorised Technician.
External request = generic control device (e.g. thermostat, tim-
er or any other system) equipped with a voltage-free NO contact
and used as control to start/stop the GA unit.
DDC Control (Direct Digital Controller) = optional Robur adjust-
ment device to control one or more Robur appliances (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 func-
tions (heating/cooling/DHW production service demands, and
control of system components such as third party generators,
adjustment valves, circulators, probes).
GUE (Gas Utilization Eciency) = eciency index of gas chiller,
equal to the ratio between the chilling energy produced and the
energy of the fuel used (relative to NCV, net caloric value).
First start-up = appliance commissioning operation which may
only and exclusively be carried out by an AT.
S61 Board = electronic board on the GA unit, to control all func-
tions and to provide interface with other devices and with the
user.
III WARNINGS
III.1 GENERAL AND SAFETY WARNINGS
Installer's qualications
Installation must exclusively be performed by a quali-
ed rm and by skilled personnel, with specic knowl-
edge on heating, electrical systems and gas appliances,
in compliance with the laws in force in the Country of
installation. The manufacturer will not accept responsi-
bility for personal injuries or property damage resulting
from improper installation.
Declaration of conformity
Upon completing installation, the installing rm shall
issue to the owner/client the appliance's workman-
like conformity declaration, according to national/local
regulations in force and the manufacturer's instructions/
provisions.
Misuse
The appliance must only be used for the purposes for
which it has been designed. Any other use is deemed
hazardous. Incorrect use may aect operation, duration
and safety of the appliance. Adhere to the manufactur-
er's instructions. Steps must be taken to avoid improper
use and potential dangers.
Hazardous situations
Do not start the appliance in hazardous conditions, such
as: gas smell, problems with the plumbing/electrical/gas
system, parts of the appliance under water or damaged,
malfunctioning, disabling or bypassing control and safe-
ty devices.
Immediately call a qualied service technician to inspect
the appliance and to replace any part of the control sys-
tem and any gas control, which has been underwater.

Warnings
Installation, use and maintenance manual – GA ACF 5
III
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 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
If you smell gas:
Do not use electrical devices such as telephones, multi-
meters or other equipment that may cause sparks next
to the appliance.
Shut o the gas supply by turning the valve o.
Switch o the power supply via the external disconnect
switch in the power supply electrical panel.
Use a telephone away from the appliance to ask for inter-
vention from qualied personnel.
Moving parts
The appliance contains moving parts.
Do not remove guards during operation, and in any case
prior to disconnecting the power supply.
Burn hazard
The appliance contains very hot parts.
Do not open the appliance and do not touch internal
components before the appliance has cooled down.
Pressure vessels
The appliance has a sealed circuit classied as pres-
sure vessel, the tightness of which is tested by the
manufacturer.
Do not carry out any intervention on the sealed circuit or
on the appliance's valves.
Water-ammonia solution
The GA unit uses the ammonia-water absorption cycle.
The water-ammonia solution is contained in the sealed
circuit. The solution is harmful for health if it is ingested,
inhaled or comes in contact with the skin.
In the event of coolant leak keep away and disconnect
the power and gas supply (only if it is possible to do so
with no danger).
It is recommended that no work be performed on the
sealed circuit except by a qualied service technician
or engineer.
Care should be taken not to disturb or handle the valves
of the sealed circuit.
Electrocution hazard
Disconnect the electrical power supply before any op-
eration on appliance components.
For electrical connections exclusively use compli-
ant components and according to the specications
provided by the manufacturer.
Ensure the appliance cannot be accidentally switched
back on.
Grounding
Electrical safety depends on eective grounding system,
correctly connected to the appliance and installed ac-
cording to the regulations in force.
Distance from combustible or ammable materials
Do not deposit ammable materials (paper, diluents,
paints, etc.) near the appliance.
Limescale and corrosion
Depending on the chemical/physical properties of the
system water, limescale or corrosion may damage the
appliance (Paragraph 3.7 p.23 ).
Check system sealing.
Avoid frequent top-ups.
Chloride concentration
The concentration of chlorides or free chlorine in the
system water must not exceed the values in Table
3.2 p.23 .
Aggressive substances in the air
Halogenated hydrocarbons containing chlorine and u-
orine compounds cause corrosion. The air of the installa-
tion site must be free from aggressive substances.
Switching the appliance o
Disconnecting the power supply while the appliance
is running may cause permanent damage to internal
components.
Except in the case of danger, do not disconnect the pow-
er supply to switch o the appliance, but always and ex-
clusively act through the provided control device (DDC
or external request).
In the event of failure
Operations on internal components and repairs may
exclusively be carried out by an AT, using only original
parts.
In the event of failure of the appliance and/or breakage
of any component, do not attempt to repair and/or re-
store and immediately contact the AT.
Routine maintenance
Proper maintenance assures the eciency and good op-
eration of the appliance over time.
Maintenance must be performed according to the man-
ufacturer's instructions (see Chapter 7 p. 36 ) and in
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 servic-
ing in case of need.

Warnings
6
III
Use only original parts.
Decommissioning and disposal
If the appliance is to be disposed of, contact the manu-
facturer for its disposal.
Keep the Manual
This Installation, use and maintenance manual must al-
ways accompany the appliance and must be handed to
the new owner or installer in the event of sale or removal.
III.2 CONFORMITY
The installation of the appliance must conform to the require-
ments of the authority having jurisdiction or, in the absence of
such requirements, to the latest edition of the National Fuel
Gas Code, ANSI Z223.1. If the unit is installed in Canada, the
installation must conform to the Canadian Gas Association
Standard CAN1 B149.1 and .2.
The appliance’s electrical connections and grounding must be
in accordance with the latest edition of the National Electrical
Codes, ANSI/NFPA No. 70 (CSA Standard C22.1 when in-
stalled in Canada) and with any local codes. To ensure the elec-
trical safety of this appliance, it must be correctly connected to
an ecient grounding system. The manufacturer is not respon-
sible for any damages caused by the failure of the grounding
system.
Other applicable provisions and standards
The design, installation, operation and maintenance of the sys-
tems 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 cooling systems, heat pumps and chillers.
▶ 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 in-
stallation and/or improper use and/or failure to comply
with regulations and with the manufacturer's directions/
instructions shall be disclaimed.
The manufacturer cannot be held responsible for any
damages to persons, animals or goods due to improper,
erroneous or irrational installation of these appliances.
In particular, the warranty on the appliance may be ren-
dered void by the following conditions:
Incorrect installation.
Misuse.
Failure to comply with the manufacturer's indications on
installation, use and maintenance.
Alteration or modication of the product or any part
thereof.
Extreme operational conditions or however outside of
the operational ranges set forth by the manufacturer.
Damages caused by external agents such as salts, chlo-
rine, sulphur or other chemical substances contained in
the installation water or present in the air of the instal-
lation site.
Abnormal actions transmitted to the appliance by the
plant or installation (mechanical stresses, pressure, vi-
brations, thermal expansion, electrical surges...).
Accidental damages or due to force majeure.

Features and technical data
Installation, use and maintenance manual – GA ACF 7
1
1 FEATURES AND TECHNICAL DATA
1.1 FEATURES
Operation
Based on the thermodynamic water-ammonia absorption cycle
(H20–NH3), the appliance produces chilled water using natural
gas (or LPG) as primary energy and dissipating heat directly to
the outside air.
The thermodynamic cycle takes place within a hermetically
sealed circuit, in welded construction, perfectly tight, factory-
tested, which does not require any maintenance or coolant
top-ups.
Mechanical and thermo-hydraulic components
▶ Steel sealed circuit, externally treated with epoxy paint.
▶ Multigas pre-mixing burner equipped with ignition and
ame detection managed by an electronic control unit.
▶ Titanium stainless steel shell-and-tube water exchanger
(evaporator), externally insulated.
▶ Air exchanger (condenser) with nned coil, with steel pipe
and aluminium ns.
▶ Variable-ow microprocessor-controlled helicoidal motor-
fan.
Control and safety devices
▶ S61 electronic board with microprocessor, LCD display and
knob.
▶ Circuit water ow switch.
▶ Generator limit thermostat, with manual reset.
▶ Automatically resettable ue gas thermostat.
▶ Dierential air pressure switch on the combustion circuit.
▶ Sealed circuit safety relief valve.
▶ Bypass valve, between high and low-pressure circuits.
▶ Ionization ame control box.
▶ Dual gas valve.
▶ Antifreeze functions for hydraulic circuit.
▶ Heat recovery exchanger circulating pump relay (HR version
only).
Versions
The GA ACF unit is available in the following versions:
▶ ACF standard, for residential/retail/industrial cooling sys-
tems with chilled water down to 37.4 °F.
▶ HR with heat recovery exchanger, for residential/retail/in-
dustrial cooling systems with chilled water down to 37.4 °F,
plus recovery exchanger hot water up to 176 °F (e.g. DHW
production).
▶ TK for heavy duty use, for process systems and applications
with chilled water down to 37.4 °F, in continuous operation
all year round.
▶ HT for very hot climates, for residential/retail/industrial cool-
ing systems with chilled water down to 41 °F, with outside
air up to 131 °F.
▶ LB for negative temperatures, for cooling systems with
chilled water down to 14 °F (with an appropriate concentra-
tion of glycol).
Models ACF, TK, LB and HT have 2 chilled water inlet/outlet t-
tings, model HR has 4 chilled water and heat recovery exchanger
hot water inlet/outlet ttings.
1.2 DIMENSIONS
Figure1.1ACF standard version dimensions
A Position of holes for xing of anti-vibration joints
38-3/8” (A)
48-1/2”
50-3/4”
27-3/8” (A)
33-1/2”

Features and technical data
8
1
Figure1.2ACF Service plate with plumbing and gas connections
A Water outlet connection Ø 1 1/4" F
B Water inlet connection Ø 1 1/4" F
E Electrical knockouts Ø 7/8"
G Gas tting Ø 1/2" F
6-1/2”
4-1/4”
5-7/8”
7-7/8”
12”
7-1/8”
G
E
A
B
Figure1.3ACF-HR Service plate with plumbing and gas connections
G Gas tting Ø 1/2" F
Chiller - CHILLED WATER
D Outlet water tting Ø 1 1/4" F
C Water inlet connection Ø 1 1/4" F
Recovery exchanger - HOT WATER
A Water outlet connection Ø 1 1/4" F
B Water inlet connection Ø 1 1/4" F
7-1/8”
5-7/8”
7-7/8”
9-7/8”
12-3/16”
3-1/8”
4-1/4”
6-11/16”
11-15/16”

Features and technical data
Installation, use and maintenance manual – GA ACF 9
1
1.3 COMPONENTS
Figure1.4Internal components - front view
1 Combustion air intake
2 Combustion blower
3 Gas valve
4 Electrical panel
5 Oil pump
6 Water inlet connection Ø 1 1/4" F
7 Water outlet connection Ø 1 1/4" F
8 Gas connection Ø 1/2" F
9 Room temperature probe
10 Fan

















Features and technical data
10
1
Figure1.5Internal components - left side view
1 Ignition transformer 2 Flue thermostat 3 Ignitor and ame detectors






Features and technical data
Installation, use and maintenance manual – GA ACF 11
1
Figure1.6Internal components - right side view
1 Safety valve
2 Return temperature probe
3 TG generator temperature probe
4 Limit thermostat
5 Flow temperature probe
6 Flow switch
7 TCN probe
1
2
5
6
7
3
4

Features and technical data
12
1
1.4 ELECTRICAL WIRING DIAGRAM
If any of the original wire as supplied with the unit must
be replaced, it must be replaced with thermoplastic 221
°F wire, except ground, high temperature and pressure
switch wires, which must be 392 °F or equivalent.
Igniter and ame sensor wire have to be replaced with
Robur spare parts.
Label all wires prior to disconnection when servicing
the controls. Wiring errors can cause improper and dan-
gerous operation.
In Figure 1.7 p. 12 , below, thermostat THL (hot water outlet
thermostat) is placed only on ACF 60-00 HR.
Figure1.7GA ACF unit wiring diagram
1.5 ELECTRONIC BOARDS
The appliance's electrical panel contains:
Electronic board S61 (Figure 1.8 p. 13 ), with microproces-
sor, it controls the appliance and displays data, messages and
operative codes. The appliance is monitored and programmed
by interacting with the display and the knob.

Features and technical data
Installation, use and maintenance manual – GA ACF 13
1
Figure1.8Electronic board S61
SCH Electronic board S61
THMF Water delivery temperature probe input
THRF Water return temperature probe input
TCN Condenser outlet temperature probe input
TA Ambient air temperature probe input
TG Generator temperature probe input
TA1 Not used
TA2 Not used
SRT1 Oil pump rotation sensor input
SRT2 Not used
JP12 Not used
SPI Not used
P8 (GND, L, H) CAN BUS connector
J1 CAN bus Jumper
A1, A2 Auxiliary inputs (not used)
TF Flue gas thermostat input
TL Generator limit thermostat input
FL Water ow switch input
FS5 Board supply input 24 Vac
P7 (R, W, Y, O) operation request inputs
IGN.BOX (L, N) ame controller supply input 230 Vac
MAIN board supply input 230 Vac
PUMP 230V (L, N) oil hydraulic pump supply
output
N.O. Contact Circuit water circulating pump
controller terminals
J10 Circuit water circulating pump controller
jumper
FAN (BK, WH, BR) Fan output
JTAG S61 board programming connector
ENC Knob
JP10 6-pole ame controller connector
F1 T 2A fuse
F2 T 10A fuse
F3 T 2A fuse
F4 T 3.15A fuse
1.6 CONTROLS
Control device
The appliance may only work if it is connected to a control de-
vice, selected from:
▶ DDC controller
▶ external request
1.6.1 Control system (1) with DDC (GAHP unit ON/
OFF)
The DDC controller is able to control appliances, a single GA 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.
▶ 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 circulat-
ing pumps, ...).
1.6.2 Control system (2) with external request for
heating or cooling (GAHP unit ON/OFF)
The appliance may also be controlled via generic enable devices
(e.g. thermostat, timer, switch, contactor...) tted with voltage-
free NO contact. This system only provides elementary control
(on/o, with xed setpoint temperature), hence without the im-
portant functions of system (1). It is advisable to possibly limit
its use to simple applications only and with a single appliance.
For connection of the selected device to the appliance's
electronic board please refer to Paragraph 4.4 p.26 .

Features and technical data
14
1
1.7 TECHNICAL DATA
Table1.1GA ACF technical data
ACF 60-00 ACF 60-00
HR
ACF 60-00
TK
ACF 60-00
HT
ACF 60-00
LB
Operation in cooling mode
Cooling capacity nominal Btu/hr 60500 (1) 58400 (1) 45400 (2)
Gas input (HHV) nominal Btu/hr 94900
GUE nominal % 71 68 53
Cold water outlet temperature minimum °F 37.4 41 14
Cold water inlet temperature maximum °F 113
Water ow rate
maximum GPM 14.1 12.8
nominal GPM 12.2 11.8 11.4
minimum GPM 11.0 10.1
ΔT nominal °F 10 9
Internal pressure drop at nominal water ow Feet of Head
psig
9.7
4.2
9.1
3.9
14.1
6.1
Ambient operating temperature maximum °F 120 131 120
minimum °F 32 10.4 32 10.4
Condenser air ow (3) nominal CFM 6000
minimum CFM 2000
Operating recovery circuit
Cooling capacity with heat recovery nominal Btu/hr 61240 (4)
Recovery unit heat capacity nominal Btu/hr - 86400 (5) -
GUE nominal (cooling+recovery) % - 155 -
Hot water ow rate (ΔT = 18 °F)
maximum GPM - 11.0 -
minimum GPM - 0 -
nominal GPM - 9.6 -
Internal recovery circuit pressure drop at nominal water ow Feet of Head
psig
4.34
3
Electrical specications
Power supply
voltage V 208-230
type - single-phase
frequency Hz 60
Condenser fan motor (variable speed) HP - 1/2
nominal ampacity full load / locked rotor A 3.1 / 6.2
Oil pump motor HP - 0.35
nominal ampacity full load / locked rotor A 2.03 / 7.7
Premix blower motor HP - 1/50
nominal ampacity full load / locked rotor A 0.55 / 0.75
Total electrical operating consumption (6) unit only kW 0.75
Minimum circuit ampacity (MCA) unit only A 8.0
Maximum over current protection (MOCP) A 10.9
Installation data
Gas consumption natural gas (nominal) CFM 1.58 (7)
Water content inside the apparatus hot side gallons - 0.79 -
cold side gallons 0.79
Water tting thread FPT 1 1/4
Gas connection thread FPT 1/2
Dimensions
width " 33 1/2
depth " 48 1/2
height " 50 3/4
Weight in operation pounds 750 815 816
shipping pounds 795 860 860
General information
Cooling uid ammonia R717 pounds 15.0 15.9 17.4 15.7 15.9
water H2O pounds 22.0 22.7 22.0 23.1
(1) Cooling capacity at standard conditions of 95 °F ambient temperature. Chilled water outlet temperature 45 °F, inlet 55 °F.
(2) Cooling capacity at standard conditions of 95 °F ambient temperature. Chilled water outlet temperature 23 °F (with 40% ethylene glycol), inlet 32 °F.
(3) Fan speed is reduced when external temperature is less than 91.4 °F.
(4) Cooling capacity at standard conditions (with recovery) of 95 °F ambient temperature. Chilled water outlet temperature 45 °F, inlet 55 °F. Heat recovery delivery temperature 122 °F, inlet 104
°F. For conditions other than nominal, apply the correction factors in following tables.
(5) Heating capacity at standard conditions (with recovery) of 95 °F ambient temperature. Chilled water outlet temperature 45 °F, inlet 55 °F. Heat recovery delivery temperature 122 °F, inlet 104
°F. For conditions other than nominal, apply the correction factors in following tables.
(6) ±10% according to the power supply voltage and tolerance on electrical motors consumption. Measured at outdoor temperature of 86 °F.
(7) HHV (natural gas) 1014 Btu/CU.FT.

Features and technical data
Installation, use and maintenance manual – GA ACF 15
1
1.7.1 Pressure drops
ACF standard, HR, TK, HT
Figure1.9ACF60-00 (standard, HT, TK, HR) unit internal pressure drop as a function of water ow rate, outlet water temperature 44.6 °F
2.00
4.00
6.00
8.00
10.00
12.00
6.00
7.00
8.00
9.00
10.00
11.00
12.00
13.00
14.00
15.00
ACF60-00,
H
T, TK, HR
Water ow [GPM]
Pressure drop [feet of head]
LB
Figure1.10ACF60-00 LB unit internal pressure drop as a function of water ow rate
8.00
10.00
12.00
14.00
16.00
18.00
6.00
7.00
8.00
9.00
10.00
11.00
12.00
13.00
14.00
15.00
ACF60-00 LB
Ethylene glycol (40%) + water ow [GPM]
Pressure drop [feet of head]

Features and technical data
16
1
HR recovery exchanger
Figure1.11ACF60-00 HR heat recovery unit internal pressure drop as a function of water ow rate, return water temperature 68.0 °F
2.2
3.3
4.4
5.5
6.6
7.7
8.8
9.9
11.0
0.00
0.67
1.34
2.01
2.68
3.35
4.02
4.69
5.36
6.03
9.46
Recovery unit water ow [GPM]
Pressure drop [feet of head]
1.7.2 Performances
Interpolations between tabled values below are permissible, but
do not extrapolate. For capacities at ambient temperatures high-
er than in table, contact Robur or your authorized distributor.
ACF standard
Table 1.2 p.16 shows the unitary cooling load at full load and
in stable operation, depending on cold water outlet tempera-
ture to the system and outdoor temperature, referring to ACF
60-00 unit.
Please consider that, according to the actual cooling request,
the unit may often need to operate under partial load conditions
and in non stationary operation.
Table1.2ACF60-00 cooling capacity [Btu/hr]
Ambient air temperature [°F] Chilled water outlet temperature [°F]
37.4 41.0 44.6 48.2
32 59307 59912 61123 62323
41 59307 59912 61123 62333
50 59307 59912 61123 62323
59 59307 59912 61123 62333
68 59307 59912 61123 62323
77 58701 59912 61123 62333
86 54465 59307 61123 62333
95 40546 52650 60517 61727
104 - - 53255 56281
113 - - 40546 47203
120 - - - 39336
TK
Table 1.3 p.16 shows the unitary cooling load at full load and
in stable operation, depending on cold water outlet tempera-
ture to the system and outdoor temperature, referring to ACF
60-00 TK unit.
Please consider that, according to the actual cooling request,
the unit may often need to operate under partial load conditions
and in non stationary operation.
Table1.3ACF60-00 TK cooling capacity [Btu/hr]
Ambient air temperature [°F] Chilled water outlet temperature [°F]
37.4 41.0 44.6 48.2
10.4 71410 71410 72015 72620
17.6 70805 70805 71410 72015
Ambient air temperature [°F] Chilled water outlet temperature [°F]
37.4 41.0 44.6 48.2
24.8 70200 70200 70200 71410
32.0 69595 69595 69595 70200
39.2 68989 68989 68989 69595
46.4 67779 68384 68384 68989
53.6 67779 67779 67779 68384
60.8 67174 67174 67779 67779
68.0 65964 65964 67174 67174
75.2 64148 64148 66569 66569
82.4 59307 61727 65358 65358
89.6 51439 57491 62938 64148
95.0 41757 52650 60517 62333
100.4 - - 56886 59912
107.6 - - 50229 55070
113.0 - - - 49624
120.0 - - - 42057
HT
Table 1.4 p.16 shows the unitary cooling load at full load and
in stable operation, depending on cold water outlet tempera-
ture to the system and outdoor temperature, referring to ACF
60-00 HT unit.
Please consider that, according to the actual cooling request,
the unit may often need to operate under partial load conditions
and in non stationary operation.
Table1.4ACF60-00 HT cooling capacity [Btu/hr]
Ambient air
temperature [°F]
Chilled water outlet temperature [°F]
41.0 44.6 50.0 54.5 57.2
32.0 59637 59637 59637 59637 60222
35.6 59637 59637 59637 59637 60222
39.2 59637 59637 59637 59637 60222
42.8 59637 59637 59637 59637 60222
46.4 59637 59637 59637 59637 60222
50.0 59637 59637 59637 59637 60222
53.6 59637 59637 59637 59637 60222
57.2 59637 59637 59637 59637 60222
60.8 59637 59637 59637 59637 60222
64.4 59637 59637 59637 59637 60222
68.0 59637 59637 59637 59637 60222
71.6 59637 59637 59637 59637 60222
75.2 59637 59637 59637 59637 60222
78.8 59053 59637 59637 59637 60222

Features and technical data
Installation, use and maintenance manual – GA ACF 17
1
Ambient air
temperature [°F]
Chilled water outlet temperature [°F]
41.0 44.6 50.0 54.5 57.2
82.4 59053 59637 59637 59637 60222
86.0 59053 59637 59637 59637 60222
89.6 57883 59637 59637 59637 60222
93.2 56129 59053 59053 59053 59637
95.0 54960 58368 58468 59053 59637
96.8 53791 57883 58468 58468 59637
100.4 50867 56714 57883 57883 59053
104.0 47944 54375 56714 57299 58468
107.6 - 51452 54960 56714 57883
111.2 - 47944 53206 55545 56714
114.8 - - 50282 53791 55545
118.4 - - 46774 50867 53206
131.0 - - - 47359 50282
LB
Table 1.5 p.17 shows the unitary cooling load at full load and
in stable operation, depending on cold water outlet tempera-
ture to the system and outdoor temperature, referring to ACF
60-00 LB unit.
Please consider that, according to the actual cooling request,
the unit may often need to operate under partial load conditions
and in non stationary operation.
Table1.5ACF60-00 LB cooling capacity [Btu/hr]
Ambient air
temperature [°F]
Chilled water outlet temperature [°F]
14.0 19.4 23.0 28.4 32.0
23.0 52007 52217 52426 52801 53176
24.8 52007 52217 52426 52801 53176
26.6 52007 52217 52426 52801 53176
28.4 52007 52217 52426 52801 53176
30.2 52007 52217 52426 52801 53176
32.0 52007 52217 52426 52801 53176
33.8 52007 52217 52426 52801 53176
35.6 52007 52217 52426 52801 53176
37.4 52007 52217 52426 52801 53176
39.2 52007 52217 52426 52801 53176
41.0 52007 52217 52426 52801 53176
42.8 52007 52217 52426 52801 53176
44.6 52007 52217 52426 52801 53176
46.4 52007 52200 52392 52784 53176
48.2 52007 52183 52358 52767 53176
50.0 52007 52166 52324 52750 53176
51.8 51965 52127 52290 52733 53176
53.6 51904 52080 52256 52716 53176
55.4 51822 52022 52221 52699 53176
57.2 51718 51952 52187 52681 53176
59.0 51588 51884 52181 52678 53176
60.8 51430 51793 52157 52666 53176
62.6 51241 51677 52113 52644 53176
64.4 51020 51533 52047 52610 53172
66.2 50763 51360 51957 52563 53169
68.0 50469 51155 51841 52503 53166
69.8 50134 50915 51696 52423 53149
71.6 49757 50638 51520 52314 53107
73.4 49334 50322 51311 52174 53038
75.2 48864 49965 51067 52002 52937
77.0 48343 49564 50785 51795 52805
78.8 47771 49117 50464 51551 52637
80.6 47143 48622 50101 51267 52432
82.4 46458 48076 49694 50941 52188
84.2 45713 47476 49240 50571 51901
86.0 44905 46822 48738 50155 51571
87.8 44033 46109 48186 49690 51194
89.6 43093 45337 47580 49174 50768
91.4 42084 44502 46919 48605 50291
Ambient air
temperature [°F]
Chilled water outlet temperature [°F]
14.0 19.4 23.0 28.4 32.0
93.2 41003 43602 46201 47981 49760
95.0 39847 42635 45400 47299 49174
96.8 38614 41599 44584 46557 48530
98.6 37302 40491 43681 45753 47825
100.4 35907 39309 42711 44884 47057
102.2 34428 38051 41673 43949 46225
104.0 32863 36713 40564 42945 45325
105.8 31208 35295 39383 41869 44356
107.6 29461 33794 38126 40720 43314
109.4 27620 32206 36793 39496 42198
111.2 25682 30531 35379 38193 41006
113.0 23645 28765 33885 36810 39735
120.0 - - 28004 31587 35176
HR
Table 1.6 p. 17 shows the cooling capacity multiplication cor-
rectional factors at full load and in stable operation, depending
on cold water outlet temperature to the system and outdoor
temperature, referring to ACF 60-00 HR unit for cooling mode
only, without heat recivery.
Table 1.7 p.17 shows the same data, referring to the ACF 60-00
HR unit in simultaneous operation for cooling and heat recovery.
Please consider that, according to the actual cooling request,
the unit may often need to operate under partial load conditions
and in non stationary operation.
Table1.6ACF60-00 HR - Cooling capacity multiplication correction fac-
tors in cooling mode (no recovery) for external air tempera-
tures and water ow rates dierent than the nominal ones
Operating mode: cooling only
Ambient air
temperature
[°F]
Chilled water outlet temperature [°F]
37.4 41 44.6 48.2
32 0.98 0.99 1.01 1.03
41 0.98 0.99 1.01 1.03
50 0.98 0.99 1.01 1.03
59 0.98 0.99 1.01 1.03
68 0.98 0.99 1.01 1.03
77 0.97 0.99 1.01 1.03
86 0.90 0.98 1.01 1.03
95 0.67 0.87 1.00 1.02
104 — — 0.88 0.93
113 — — 0.67 0.78
Table1.7ACF60-00 HR - Cooling capacity multiplication correction fac-
tors in cooling+recovery mode for external air temperatures
and water ow rates dierent than the nominal ones
Operating mode: cooling and heat recovery
Ambient air
temperature
[°F]
Chilled water outlet temperature [°F]
37.4 41 44.6 48.2
32 0.97 0.98 1.00 1.02
41 0.97 0.98 1.00 1.02
50 0.97 0.98 1.00 1.02
59 0.97 0.98 1.00 1.02
68 0.97 0.98 1.00 1.02
77 0.96 0.98 1.00 1.02
86 0.89 0.97 1.00 1.02
95 0.73 0.91 1.00 1.02
104 — 0.89 0.95 0.96
113 — — 0.80 0.85
Following Tables show the unitary recoverable heat output at
full load and in stable operating mode, depending on the tem-
perature of the thermal input uid to the recuperator and the

Transport and positioning
18
2
outdoor temperature for dierent water ow rates to the recu-
perator, referring to the ACF 60-00 HR unit.
Consider that in the absence of a refrigeration request no recov-
erable heat output will be available.
Table1.8ACF60-00 HR - Heat capacity of the heat recovery unit for
conditions other than nominal ones; ow rate = 2.2 GPM
Heat capacity [Btu/hr] (ow rate = 2.2 GPM)
Hot water return
temperature to
the recovery [°F]
Ambient air temperature [°F]
59 68 77 86 95 104 113
50 92210 92893 93576 93917 95283 96308 97333
68 72743 75134 76978 78549 80188 83330 85379
86 52628 55667 58570 61644 65162 68577 72231
104 35859 39275 42007 46071 50954 55667 61507
122 21857 24248 27356 31761 37567 43714 50818
140 9563 12226 15368 18783 25033 31420 40982
158 — — 8196 8982 13831 21003 30395
Table1.9ACF60-00 HR - Heat capacity of the heat recovery unit for
conditions other than nominal ones; ow rate = 4.4 GPM
Heat capacity [Btu/hr] (ow rate = 4.4 GPM)
Hot water return
temperature to
the recovery [°F]
Ambient air temperature [°F]
59 68 77 86 95 104 113
68 92210 99040 102797 106895 109286 — —
86 71719 78208 83604 85755 89546 95625 102455
104 47983 54643 61473 65162 71719 78549 85584
122 27765 34083 41426 45149 53004 59868 65640
140 10246 16051 21447 25682 34152 40299 46105
158 — — 8538 11953 19330 23906 31078
Table1.10ACF60-00 HR - Heat capacity of the heat recovery unit for
conditions other than nominal ones; ow rate = 6.6 GPM
Heat capacity [Btu/hr] (ow rate = 6.6 GPM)
Hot water return
temperature to
the recovery [°F]
Ambient air temperature [°F]
59 68 77 86 95 104 113
68 96991 102455 109286 — — — —
86 75134 81964 88795 93269 100406 105871 110993
104 50886 60107 66596 72368 80257 87429 93917
122 30224 38592 44295 50203 56931 64137 71377
140 10929 17076 22779 28346 34152 40982 47813
158 — — 10587 14344 21174 29029 33469
Table1.11ACF60-00 HR - Heat capacity of the heat recovery unit for
conditions other than nominal ones; ow rate = 8.8 GPM
Heat capacity [Btu/hr] (ow rate = 8.8 GPM)
Hot water return
temperature to
the recovery [°F]
Ambient air temperature [°F]
59 68 77 86 95 104 113
68 97333 104709 110993 — — — —
86 76158 83399 91868 97333 — — —
104 51228 61302 72094 78549 85106 92210 99040
122 30258 39275 47813 54643 59902 66596 76158
140 14002 17144 24111 29678 35859 42690 49520
158 — — 12704 17076 22882 29712 35859
Table1.12ACF60-00 HR - Heat capacity of the heat recovery unit for
conditions other than nominal ones; ow rate = 11.0 GPM
Heat capacity [Btu/hr] (ow rate = 11.0 GPM)
Hot water return
temperature to
the recovery [°F]
Ambient air temperature [°F]
59 68 77 86 95 104 113
68 103924 — — — — — —
86 81281 88795 102455 — — — —
104 57033 64888 76295 82613 88795 97572 102455
122 36884 41255 49520 58058 63454 71104 79061
140 17452 21345 26331 31112 38113 45798 55736
158 — — 13285 18100 23906 30737 39275
2 TRANSPORT AND POSITIONING
2.1 WARNINGS
Damage from transport or installation
The manufacturer shall not be liable for any damage dur-
ing appliance transport and installation.
On-site inspection
Upon arrival at the site, ensure there is no transport dam-
age on packing, metal panels or nned coil.
After removing the packing materials, ensure the appli-
ance is intact and complete.
Packing
Only remove the packing after placing the appliance on
site.
Do not leave parts of the packing within the reach of
children (plastic, polystyrene, nails...) since they are po-
tentially dangerous.
Weight
The crane and lifting equipment must be suitable for the
load.
Do not stand under suspended loads.
2.2 HANDLING
Handling and lifting
▶ Always handle the appliance in its packing, as delivered by
the factory.
▶ To lift the appliance use straps or slings inserted in the holes
of the base (Figure 2.1 p.19 ).
▶ Use lifting beams to avoid damaging the outer panels and
nned coil (Figure 2.1 p.19 ).
▶ Comply with safety regulations at the installation site.

Transport and positioning
Installation, use and maintenance manual – GA ACF 19
2
Figure2.1Instruction for lifting
In the event of handling with forklift or pallet truck,
comply with the handling instructions shown on the
packing.
2.3 APPLIANCE POSITIONING
Do not install inside a room
The appliance is type-approved for external installation.
Do not install inside a room, not even if it has openings.
In no event start the appliance inside a room.
GA Unit ventilation
The aerothermic appliance requires a large space, venti-
lated and free from obstacles, to enable smooth ow of
air to the nned coil and free air outlet above the mouth
of the fan, with no air recirculation.
Incorrect ventilation may aect eciency and cause
damage to the appliance.
The manufacturer shall not be liable for any incorrect
choices of the place and setting of installation.
Where to install the appliance
▶ The appliance may be installed at ground level, on a terrace
or on a roof, compatibly with its dimensions and weight.
▶ It must be installed outside buildings, in an area of natural air
circulation, outside the dripping path of drainpipes or simi-
lar. It does not require protection from weathering.
▶ No obstruction or overhanging structure (e.g. protruding
roofs, canopies, balconies, ledges, trees) shall interfere either
with the air owing from the top of the appliance or with the
exhaust ue gas.
▶ Do not install near the exhaust of ues, chimneys or hot
polluted air. In order to work correctly, the appliance needs
clean air.
Acoustic issues
▶ Pre-emptively assess the appliance's sound eect in connec-
tion to the site, taking into account that building corners, en-
closed courtyards, restricted spaces may amplify the acous-
tic impact due to the reverberation phenomenon.
2.4 MINIMUM CLEARANCE DISTANCES
Distances from combustible or ammable materials
▶ Keep the appliance away from combustible or ammable
materials or components, in compliance with applicable
regulations.
Clearances around the appliance
There must be a minimum clearance of 4 feet horizontally from
electric meters, gas meters, regulators, and relief equipment and
in no case the appliance can be located above or below these
items unless a 4 feet horizontal distance is maintained.
The minimum clearance distances shown in Figure 2.2 p. 19
(bar any stricter regulations) are required for safety, operation
and maintenance.
Figure2.2Clearances for correct installation of the appliances
single unit multiple units
36”
18” 18” 18” 18” 18”
36”
24” 24”
When the appliance is installed in close proximity to buildings,
keep the appliance away from the roof edge drip line. In no case
should the appliance be placed within 6 feet of any external air
intakes of the building. For installations on balconies or roofs,
the appliance should not be located within 8 feet from chimney
ues, outlets and other such vents. It is important that the ap-
pliance is located so that hot or contaminated air IS NOT drawn
into the air intakes of the unit (Figure 2.3 p.20 ).

Transport and positioning
20
2
Figure2.3Clearances from vent outlets, chimney ues and air intake openings
Roof/Terrace installation Ground installation
6 FT. MIN
6 FT. MIN.
8 FT. MIN.
8 FT. MIN.
2.5 MOUNTING BASE
Mounting base constructive features
▶ Place the appliance on a level 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 level
concrete base, with a minimum thickness of 4" and larger
than the unit base by at least 4÷6" on each side (Figure
2.4 p.20 ). Local soil conditions will actually dictate the slab
thickness required to prevent shifting.
▶ Do not allow the concrete slab to touch the foundation of a
structure. Unit operational noises can be transmitted inside
the structure if they are connected.
Figure2.4Dimenstions of the unit bed
1 4" concrete slab
1
38”
54”
(2) - installation on terrace or roof
▶ The structure of the building must support the total weight
of the appliance and the supporting base.
▶ If necessary, provide a maintenance walkway around the ap-
pliance.
▶ Although approved for installation on a combustible
base, the appliance must not be installed directly on the
roof surface. Use base supports for the installation (Figure
2.4 p.20 ).
▶ Installation on roofs directly above sleeping quarters should
be avoided if possible. If not possible, special consideration
must be given to the transmission characteristics of the
building structure. The use of vibration isolators under the
equipment (acoustically insulated bases) and approved ex-
ible connections (vibration-damping pipe ttings) between
the unit and the piping system is recommended.
2.5.1 Leveling
The unit should be level both front to back and side to side. Place
a level on the top of the unit to check for level. If the unit is not
level, metal shims are recommended for use under proper cor-
ners to obtain level. If the shim(s) thickness exceeds 1/2", sup-
port shims should be inserted under the center of the unit.
Anti vibration mountings
Although the appliance's vibrations are minimal, resonance
phenomena might occur in roof or terrace installations.
▶ Ground level installations should use vibration-damping
base supports, available from the factory. Another option is
to use 4" thick concrete slabs positioned under the unit, in-
stead of the factory base supports.
▶ Also provide anti-vibration joints between the appliance
and water and gas pipes.