ATC Electrical & Mechanical,
ATC House, Broomhill Drive, Tallaght, D24 EF99, Ireland
IE: 01 4678301, UK:0203 564 9164, Email [email protected]
-5-
All water connections to the heater must be made in copper pipe. If using Qualpex or
similar plastic piping method then a minimum of one metre of copper pipe must be
installed between the heater and the plastic piping system. All pipework between the
heater and the safety valve should be in copper and continue at least 1m from the water
heater.
Connect the cold-water inlet pipe to the inlet connection (marked with a blue ring) and
the hot water outlet pipe to the outlet connection (marked with a red ring). Dielectric
Connections are supplied and should be used as necessary.
The water heater 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 pipe work provided that an expansion relief valve is fitted (Check Local Reg-
ulations in your area). See drawing below.
WATER PIPE CONNECTIONS
Non Return
Valve
*
Mains Water
Supply (MWS)
Service
Valve
*
Kit-C
1
To Drain
Pressure Release
Valve Supplied
With Unit
2.8m (5 &10 Ltr) or 4.2m (15 Ltr) is required for expansion in pipework between
cold water inlet and non return valve.
For Inlet water pressure up to 4.1 bar.
Cold in
Hot out
Where the expanded water cannot be accommodated in the pipe work due to space
restrictions and the static water supply pressure is under 4 bar, an expansion vessel
should be fitted in between the water heater and the safety relief valve.
Where static water pressures are likely to exceed 4 bar, fit a pressure reducing valve.
Note: In this case expansion using the mains is not permitted and an expansion vessel
must be used.