Robur GAHP Line AR Series, Installation, Use And Maintenance Manual

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GAHP-AR – Installation, start-up, use and maintenance manual
6
Edition: 2014-08
Do not use the GAHP-AR if any part has been under water. Immediately call a
qualified service technician to inspect the appliance and to replace any part of the
control system and gas control, which has been under water.
Maintenance
Correct and regular maintenance ensures that the GAHP-AR will continue to run properly
and efficiently over time.
Trust the maintenance of the internal components of the GAHP-AR to a Qualified Service
Engineer, who will perform the operations following the manufacturer’s instructions.
For other maintenance operations, go to the “MAINTENANCE” paragraph, page 73.
Any repairs to the GAHP-AR must be done by a Robur authorized Technical Service
Centre (TAC), using only original replacement parts. Not following these regulations could
compromise their functioning and safety, and also void the warranty if still valid.
If the GAHP-AR is sold or transferred to another owner, make sure that this manual is
included in the transaction so that the new owner and any installers may use it for
consultation purposes.
If the GAHP-AR is decommissioned, contact Robur Corporation for its disposal.
1.2 OPERATION OF THE GAHP-AR
GAHP is the acronym for “Gas Absorption Heat Pump”. The GAHP-AR is a high efficiency
reversible air-water heat pump, operating by a water-ammonia absorption cycle and
designed for outdoor use.
The GAHP-AR is able to chill water down to a temperature of 37.4 °F, or to heat it up to
140°F in heat pump mode with a nominal
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efficiency of 126%.
The cycle of the GAHP-AR is fed by thermal energy provided by a gas burner, therefore
the required electric energy is limited to driving the fan and pump motors (the only
mechanical moving components of the unit).
The GAHP-AR is fed by natural gas or LPG, and supplied with 208-230 V – 60 Hz single
phase electrical power. The inversion (cooling-heating) is done by a complex dedicated
valve.
The evacuation of combustion products takes place through appropriate exhaust terminal,
located on the side of the appliance (see paragraph “GAHP-AR DIMENSIONS”, page 14),
with outlet in a vertical position.
Operating mode
¾ When operating in cooling mode (in summer)
the appliance operates as an absorption chiller, and the heat, taken away from the
cooled environment via the HYDRAULIC CIRCUIT, is dissipated towards the
outside via the air-cooled FINNED COIL.
¾ When operating in heating mode (in winter)
the appliance uses the absorption cooling cycle to recover heat from the outside
environment via the FINNED COIL which, added to the heat produced by the
combustion of natural/L.P.G. gas, is transferred into the EXCHANGER and then
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Nominal conditions: external ambient temperature 44.6°F; inlet water temperature 122°F.