10
Due to the pre-set
starting pressure, the
column of water above
the controller cannot
exceed 20m.
If necessary, the
controller can be raised.
NO water can be drawn off
between the pump outlet and
the control unit.
11. Boosting mains supply or connecting to a hot water
system
Boosting Mains supply
Connecting any of these pumps directly to mains water supply is not recommended.
If mains pressure is poor, best practice is to install an isolating (break) tank.
Use the guidelines in Section 12 or 13 depending whether the water from the tank will be
above or below the pump inlet.
Note PTF models not recommended for suction lift applications.
Pumps supplying Mains Pressure Hot Water Systems:
An approved Non Return Valve should be fitted to the hot water inlet to protect the pump
from backpressure due to expansion.
Pumps supplying Low Pressure Hot Water Systems:
Fit a pressure reducing valve to ensure pump maximum pressure
doesn’t exceed hot
water cylinder rating.
Hot water systems must be installed in acc
ordance with the manufacturer’s
recommendations and comply with all local regulations.
Water column above controller