gledhill 120IND, Design, Installation & Servicing Instructions

Page: 10 / 20

Page 10
System Controls
The system controls should be developed in conjunction with the heat
pump manufacturer.
Using the buffer store in conjunction with an additional heat source
requires a more sophisticated control system. This is to stop the boiler
dominating the heating of the cylinder and reducing the possible input
of the heat pump.
Soldering
In line with good plumbing practice, use with excessive flux should
be avoided.
When soldering above the cylinder, ensure flux/solder does not
contaminate the cylinder below, since this can cause corrosion.
Flushing the system
Before completing the heat pump connections, the heating installation
must be flushed in order to remove any impurities that may be present,
residues of sealing agents. Any accumulation of residues and other
deposits in the heat pump condenser may result in reduced efficiency of
the unit or a total failure of the heat pump.
Water Treatment And Frost Protection
Although the Buffer store has no special water treatment requirements,
the radiators and other parts of the circuit will require the application of a
scale and corrosion inhibitor. The heat pump and the external connecting
pipe work will also require protection against freezing. For this reason, a
combined antifreeze and inhibitor product such as Fernox Alphi 11 must
be used (see Fernox Alphi 11 datasheet in Appendix A).
The volumes and concentration should be calculated in accordance with
the manufacturer’s instructions and when calculating the system volume
i.e. the water content, the volume of the Buffer store should be taken into
account (see technical specification tables).
NOTE
At the time of commissioning, complete all relevant sections of
the Benchmark Checklist located on the inside back pages of this
document.
This must be completed during commissioning and left with the
product to meet the Warranty conditions offered by Gledhill.
INSTALLATION
COMMISSIONING