Table of Contents
Advertisement
After all mechanical and electrical work has been completed, the following instructions should be
followed.
5.1 Purging the ground array of air.
It is important for correct operation that all the air is removed from the ground arrays including the head-
er pipework. Slinkies consist of a large number of 1 metre diameter loops of 32mm OD pipe and air can
collect at the top of these loops. Even vertical (ie. drilled) arrays can have trapped air and should be
purged.
A normal rising cold water main in a building has insufficient flow to force out this air. Mains water is also
"aerated", so should not be used.
For large systems a large pump maybe required and advice can be sought from Kensa. A suitable pump for
most applications has the following specification, however it should be checked against the installation
requirements.
Fig 11 purge pump
It is important that the right fittings are used on the pump (these will be extra to the pump), it is clean and
all joints are air tight.
5.1.1 Purging procedure for ground arrays.
It is important that all the air is removed from the ground arrays and header pipework prior to commissioning.
Failure to do this could result in damage to the units.
When purging good engineering procedures should be followed and all high points should have air bleed points
installed.
Plant Room Heat Pump Manual Version 11.1
Page 18 of 34
5. Setting to Work
Outlet size = 50mm
Max output (no lift) = 600l/min
Max suction lift = 8m
Max total lift = 27m
Fuel = unleaded
Advertisement
Table of Contents
