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15 Accessories
Figure 15-1: Sealed system kit
15.1 Sealed System Kits
These are required when the Grant
Aerona Heat Pump is used as part of
sealed heating system – refer to
Section 7 for further details.
Kit 1 (Grant Ref. HPAW55K12)
12 litre expansion vessel kit
For use on heating systems with a
volume of up to 110 litres*
Kit contents:
12 litre expansion vessel
Wall bracket and fixing band
3 bar pressure relief valve
Manifold
Pressure gauge
Filling loop kit (isolation valve, non-
return/isolation valve and filling hose)
Kit 2 (Grant Ref. HPAW55K18)
18 litre expansion vessel kit
For use on heating systems with a
volume of up to165 litres*
Kit contents:
18 litre expansion vessel
Wall bracket and fixing band
3 bar pressure relief valve
Manifold
Pressure gauge
Filling loop kit (isolation valve, non-
return/isolation valve and filling hose)
40
Figure 15-2: Automatic hot water boost kit
Kit 3 (Grant Ref. HPAW55K50)
50 litre expansion vessel kit
For use on heating systems with a
volume of up to 460 litres*
Kit contents:
50 litre expansion vessel
Wall bracket and fixing band
3 bar pressure relief valve
Manifold
Pressure gauge
Filling loop kit (isolation valve, non-
return/isolation valve and filling hose)
*maximum system volumes shown for
all sealed system kits are based on a
vessel charge and initial (cold) system
pressure of 1 bar.
15.2 Immersion Heater Kits
Kit 4 (Grant Ref. HPDHWBK1)
Automatic domestic hot water
boost kit - with manual override
This kit, installed next to the hot water
cylinder, allows the stored hot water
temperature to be automatically
boosted in winter periods using the
existing cylinder immersion element and
thermostat. Refer to Section 9 for
further details.
Kit contents:
Enclosure (containing)
Pre-wired Relay and By-pass switch
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