6
2.3 Flow direction
The heater can accept flow of water from only one end (see Fig. 5). If the flow direction is opposite to
Fig. 5 the heater must be rotated by 180° so the flow switch is always where the water exits.
DO NOT REVERSE THE FLOW SWITCH
INLET
OUTLET
Fig. 5
It is essential that the pipe work connecting to and from the heater has a minimum bore (internal diameter)
of 32mm. To support correct air purging and to ensure the heater remains completely full of water during
operation, the return
pipe which carries the water back to the pool must incorporate a safety loop or ‘kick-
up’ in the pipe as close as possible to the heater (see Fig 4).
NOTE:
When coupling to a flexible pipe a safety loop can easily be formed by directing the pipe up
and over an obstacle. Pipe clips should be used to securely fasten all hose connections.
Fig. 6
Fig. 7
If rigid pipework is used
There is no need to use mastic or PTFE tape to connect unions or hosetails to the heater, use the O-ring
supplied which should be slid over the threaded ends (see Fig. 6).
All factory unions are made from ABS plastic, when gluing connections to an ABS pipe an ABS cement
must be used or when using a PVC pipe, a Transition cement must be used (see Fig. 7).
NOTE:
Be sure to apply the glue evenly and to all surfaces that will be in contact to reduce the
risk of leakage.