1 Features and technical data
6
Decommissioning and disposal
If the appliance is to be disposed of, contact the manu-
facturer for its disposal.
Store the Manual
This "Installation, Use and Maintenance Manual" must
always accompany the appliance and must be hand-
ed to the new owner or installer in the event of sale or
removal.
III�2 CONFORMITY
EU Directives and standards
GA series absorption chillers are certified in compliance to EC
standards and conform with the essential requirements of the
following Directives:
▶
2009/142/EC "Gas Appliances Directive" as amended and
added.
▶
2004/108/EC "Electromagnetic Compatibility Directive" as
amended and added.
▶
2006/95/EC "Low Voltage Directive" as amended and added.
▶
2006/42/EC "Machine Directive" as amended and added.
▶
97/23/EEC "Pressure Equipment Directive" as amended and
added.
Furthermore, they comply with the requirements of the follow-
ing standards:
▶
EN 378 Refrigerating systems and heat pumps.
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 ac-
cordance with the manufacturer's instructions. In particular, reg-
ulations regarding the following shall be complied with:
▶
Gas systems and equipment.
▶
Electrical systems and equipment.
▶
Heating and air conditioning systems, 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 direc-
tions/instructions shall be disclaimed.
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 indica-
tions on installation, use and maintenance.
▶
Alteration or modification of the product or any part
thereof.
▶
Extreme operational conditions or however out-
side of the operational ranges set forth by the
manufacturer.
▶
Damages caused by external agents such as salts,
chlorine, sulphur or other chemical substances con-
tained in the installation water or present in the air of
the installation site.
▶
Abnormal actions transmitted by the plant or instal-
lation to the appliance (mechanical stresses, pres-
sure, vibrations, thermal dilations, power surges...).
▶
Accidental damages or due to force majeure.
1 FEATURES AND TECHNICAL DATA
1�1 FEATURES
Operation
Based on the thermodynamic water-ammonia absorption cycle
(H
2
0–NH
3
), the appliance produces chilled water using natural
gas (or LPG) as primary energy source and dissipating heat di-
rectly to the external air.
The thermodynamic cycle takes place within a hermetically
sealed circuit, in welded construction, perfectly tight, facto-
ry-tested, which does not require any maintenance or coolant
top-ups.
Mechanical and thermo-hydraulic components
▶
steel sealed cooling circuit, externally treated with epoxy
paint;
▶
Multigas premix burner equipped with ignition and flame
detection device, controlled by an electronic controller;
▶
titanium stainless steel shell-and-tube water exchanger
(evaporator), externally insulated;
▶
air exchanger (condenser) with finned coil, with steel pipe
and aluminium fins;
▶
helical fan motor with variable flow controlled by micro pro-
cessor.
Control and safety devices
▶
S61 electronic board with microprocessor, LCD display and
knob;
▶
circuit water flow switch;
▶
manually reset generator limit thermostat;
▶
automatically resettable flue gas thermostat;
▶
differential air pressure switch on the combustion circuit;
▶
sealed circuit safety relief valve;
▶
by-pass valve, between high and low pressure circuits;
▶
ionisation-based flame controller;
▶
gas solenoid valve with double shutter;
▶
heat recovery exchanger circulating pump relay (HR version
only)
ACF-HR/TK/HT/LB Versions
The GA unit is available in the following versions:
