Installation Instructions
8
PRODUCT IS NOT SUITABLE FOR GRAVITY CIRCULATION SYSTEMS
— The primary circuit must be pumped.
DO NOT REMOVE OR ADJUST THE TEMPERATURE AND PRESSURE RELIEF VALVE
— The valve is pre-calibrated to open at 6 or 8 bar, and at 90°C
— Any attempt to adjust it will invalidate warranty and may affect the safety performance of the unit.
4.14 Secondary Return (where applicable)
Some Element cylinders are fitted with a secondary return connection. Secondary circuit connections must be made to the cylinder
in accordance with the recommended installation diagram. A drain cock (not supplied) should be fitted in the cold water inlet to
facilitate draining of the cylinder (see Figure 1). A swept tee* is needed for all indirect models if secondary circulation is required
and is fitted as per the illustration. A non-return valve* must also be fitted to prevent back flow. A pump* will be required to circulate
the hot water. The return feed is in 15mm pipe and all work can be done on site. *not supplied.
IMPORTANT: IF A SECONDARY CIRCULATION CIRCUIT IS INSTALLED THEN A LARGER EXPANSION VESSEL MAY BE
REQUIRED TO HANDLE THE INCREASE IN WATER VOLUME.
— Calculate the additional water volume;
— Contact Dutypoint Service on 01452 300590 regarding suitable vessel sizes.
Figure 2:
Secondary Return Connection Installation
Secondary
circulation
pump
Non return
valve (check
valve)
Cold inlet
connection
Drain cock
Cold water
supply
Swept tee
