3
Hot Water Supply to the Pump
DO NOT USE ANY JOINTING COMPOUNDS OR TAPE
We recommend that 28mm pipe work is used to feed the cylinder from the header tank for
optimum performance.
The use of a Surrey Flange (see Figure 1, page 6), or equivalent, is recommended for
optimum pump performance.
It is not recommended that the hot water supply is taken directly from the top of the hot
water cylinder, as entrapped air may cause problems.
22mm pipework is recommended to ensure an adequate flow to the pump. Where high
flows are expected, 28mm is recommended. Refer to the technical data sheet for minimum
pipe size.
It does not matter which end of the pump is connected to the hot water supply. Ensure that
the hot water supply is connected to the inlet port on the pump.
Cold Water Supply to the Pump
DO NOT CONNECT DIRECTLY TO WATER MAINS
DO NOT USE ANY JOINTING COMPOUNDS OR TAPE
The cold water supply to the pump must be connected directly from the cold water storage
tank, see Figure 1, page 6. 22mm pipework is recommended to ensure an adequate flow
to the pump. Refer to the technical data sheet for minimum pipe size.
The tank connector should be positioned at least 25mm (1”) lower than the cold water
supply to the hot water cylinder to prevent the supply of hot water only.
It does not matter which end of the pump is connected to the cold water supply. Ensure
that the cold water supply is connected to the inlet port on the pump.
Connecting the Pump
DO NOT USE ANY JOINTING COMPOUNDS OR TAPE
For ease of installation, future servicing and cleaning of filters, full bore isolating gate
valves must be fitted to the inlet and outlet pipe work to the pump. (See Figure 1, page 6).
Isolating valves greatly assist draining down, strainer cleaning and refilling, which will result
in much lower service costs.
The flexible hoses supplied with the pump must be used for connecting this pump to the
pipe work. Use of these hoses will ensure strain and vibration-free watertight connections.
The maximum bend angle must not exceed 45º.
Failure to use the hoses, filters and washers (where required) supplied with the
pump will invalidate the warranty.
After initial installation, run the pump for a few minutes, switch off, drain down and clean
the inlet strainers.
Line up pipework and fit hoses to the pump before connecting to pipes. Position pipework
accurately so that the pump is not subject to mechanical strain.
Plastic nuts should be finger tight plus ¼ turn. Ensure correct alignment to avoid cross
threading. The nuts should be retightened after hot water has been pumped for the first
time.
