Commissioning
17
8 Commissioning
1)
Before turning on the mains supply to the cylinder, a hot water tap should be opened, preferably on the same floor or the
floor below the location of the cylinder.
2)
Turn on the supply to the cylinder and fill until water runs from the open hot water tap.
3)
Close the hot water taps and bring the cylinder up to working pressure.
8.1 Draining
1)
Switch off electrical power to the immersion heaters and/or shut down the boiler. Close the stopcock valve to isolate the unit.
2)
Attach a hosepipe to the drain cock with sufficient length to take water to a suitable discharge point.
3)
Open the drain cock.
4)
Open the hot water tap nearest the unit. If water fails to drain from the cylinder, vent the system by opening the temperature
and pressure relief valve.
8.2 Scale
In hard water areas lower water temperatures can result in less scale being deposited.
If a water softener us used is should be capable of flows up to 77 litres/minute and operating pressures matching the operating
pressure of the cylinder (4.5 bar or 6 bar). This will maintain the performance of the unit. If no de-scaler or softener is used then the
heating elements will require periodic de-scaling for maximum efficiency and to prevent damage.
8.3 User Instructions
Your Element UHP unvented hot water cylinder has been designed to give many years of trouble-free service and is made from
hygienic, high grade stainless steel. A 3kW electric immersion heater which heats the water to 60C.
The flow temperature of the hot water can be set to your requirements on the immersion heater (ideally maximum 60°C. Higher
temperatures can cause tripping of the high limit thermostat and introduce more energy loss from the cylinder.
When a hot tap is turned on there may be a short surge of water, this is quite normal with unvented systems and does not indicate
a fault. When you first fill a basin the water may sometimes appear milky. This is due to very small air bubbles in the water which
will clear quickly.
WARNING: IF COLD/ARM WATER EXISTS FROM THE TEMPERATURE AND PRESSURE RELIEF VALVE (TPV) OR FROM THE
PRESSURE RELIEF VALVE (PRV):
— Call your installer or call Dutypoint Service on 01452 300590.
WARNING: IF VERY HOT WATER EXITS FROM EITHER VALVE:
— Switch off the heat source immediately
— Isolate the electrical supply to the cylinder and separate heat source.
