Installation
Requirements
1
These instructions must be read and fully understood before commencing
the installation. If in doubt, or in need of further guidance please ring Zip
on 0870 608 8888.
2
Zip Varipoint unvented water heaters must be installed by a competent
installer, familiar with unvented electric water heaters.
3
Installations must comply fully with UK Water Regulations and any Local
Authority requirements.
4
The electrical installation including earthing and cross bonding
should comply with the current IEE regulations and any Local Authority
requirements.
5
The Zip Varipoint is designed for connection direct to the incoming mains
water supply and accommodation must be made for the expanded water
that will occur with each operating cycle. Regulations permit expanded
hot water to be accommodated within the supply pipework provided that
no check valve, stop valve with loose jumper or other fitting can prevent
reverse flow (diagram 1).
Where the expanded water cannot be accommodated in the pipe work
and the static water supply pressure is under 4 bars, fit accessory pack
AQ2 (Expansion vessel and check valve). Where static water pressures
are likely to exceed 4 bars, fit accessory packs AQ2 and AQ3 Pressure
reducing valve and line strainer. See diagrams 2 and 3.
6
The 6 bar expansion relief valve must be fitted on the cold water supply.
7
If required, a T&P valve ( Zip Accessory AQ1) may be fitted to the boss
provided and must be installed in accordance to manufacturers
instructions.
8
The drain connection from the expansion relief valve and the T&P relief
valve ( if fitted ), must be in accordance with Water Supply Regulations.
The point of discharge must be in a safe and visible position. The
connection should be made using 15 mm pipe having a continuous
fall to a maximum length of three metres. It shall not have more than
3 right-angled bends. If a waste connection in excess of three metres
is necessary, the pipe diameter should be 22 mm with a continuous fall
and no more than four right-angled bends to a maximum resistance to
flow equivalent to 9 metres of straight pipe.
9
An Isolating valve must be fitted to the cold water supply.
10 Valves and fittings must be of a type required by Water Supply
Regulations.
Zip Varipoint II Installation, Maintenance and User Instructions - June 2004
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