Water Pressure; "Hard" Water Areas - Glow-worm Swift flow 120 Installation Instructions Manual

5 D o m e s t i c
5.1 General
The domestic hot water service must be in accordance
with the rules in force in the countries of destination.

5.2 Water Pressure

For the minimum and maximum working pressures of
the domestic hot water circuit of the boiler, refer to
Section 1.6. If the cold water supply pressure exceeds
the maximum, a pressure reducing valve must be fitted
in the supply to the boiler to reduce the pressure to
within the limits given.
220674B
Supplied By www.heating spares.co Tel. 0161 620 6677
H o t W a t e r

5.3 "Hard" Water Areas

In areas where the water is "hard", that is, more than
200mg/litre, it is recommended that a proprietary scale
reducer is fitted in the cold supply to the boiler.
Check the total water "hardness" using the kit supplied,
in the door, following the instructions given. Consult the
local water company for additional advice.
A double check valve assembly must be fitted upstream
of the scale reducer. For the relative position of the scale
reducer and pressure reducing valve, if required, refer to
the manufacturer's instructions.
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S y s t e m