8
the primary flow or return pipe. The primary
flow and return fittings are 3/4’’ BSP female.
The valve has 22 mm x copper connections.
The direction of primary flow in the coil is
bottom to top. The maximum operating
temperature of the primary flow would typi-
cally be 82°C.
16. For electrical connection of the motorised
valve and immersion heater, please read
Electrical Installation Instructions..
Tundish
17. Install the Tundish (6) in a vertical position
within a maximum of 600 mm from the
temperature and Pressure Relief Valve drain
connection (5). Ensure the expansion relief
pipework discharges through the tundish.
Tundish pipework (16) must be 22 mm with
a minimum vertical length of 300 mm below
tundish. Maximum permitted length of 22
mm pipework is 9 m. Each bend or elbow is
equivalent to 0.8 m of pipework. All pipework
must have continuous fall and discharge in
a safe, visible position. If any doubt, refer to
Building Regulation G3.
Drain cock
18. Fit the drain cock (supplied) to the 1/4” drain
connection (21), see illustration. It is also
recommended to add a drain cock (25) (not
supplied) on lowest point of cold water inlet
supply (13), see illustration.
16
5
6
13
25
21
