Page 18
User, Installations and Maintenance Manual
2)
Mount the expansion vessel (f) to the wall.
1
2
fig. 20
3)
Fit the T-piece (c) to the domestic hot water cold water IN
pipe of the unit.
4)
Connect the pressure reducing valve/pressure relief valve
combination (a) to the T-piece (c) with a length of copper tube
Ø22 mm (field supply).
5)
Connect the expansion vessel (f) to the T-piece (c) with a
length of copper tube Ø22 mm (field supply).
6)
Connect the pressure reducing valve/pressure relief valve
combination (a) to the water mains inlet.
7)
Install the tundish (d) in a vertical position within a maximum
of 600 mm away from the pressure reducing valve/ pressure
relief valve combination.
ATTENTION! Install the tundish away from any
electrical device. Possible consequence: Electri-
cal shock or fire.
NB!: To ensure a free water flow through the discharge
pipe, manually operate the pressure relief valve by turn-
ing its knob left.
8)
Using the accessory brass compression coupler (part of the
T/P valve installed on the hot water tank), connect the discharge
pipe (
Ø 15mm
) to the T/P valve (29). Install the tundish (d) in a
vertical position within a maximum of 600 mm away from the
T/P valve.
9) Connect the 2 tundishes, supplied with the G3 kit, to an
appropriate drain according to the applicable legislation.
The following example shows discharge below fixed grat-
ing (Building Regulation G3 section 3.61 gives alternative
points of discharge):
≤600 mm
≥300 mm
a
D1
D2
c
b
d
fig. 21
a
Safety device (pressure and temperature relief valve of do-
mestic hot water tank; pressure relief valve of domestic hot wa
-
ter tank kit)
b
Tundish
c
Fixed grating
d
Trapped gully
D1
Metal discharge pipe from safety device to tundish
D2
Discharge pipe from tundish, with continuous fall. See Build-
ing Regulation G3 section 3.56, Table 03 and worked example.
10)
After completing the installation, the installer has to fill out
the warning label on the tank with indelible ink.
WARNING TO USER
WARNING TO INSTALLER
Installed by:
a. Do not remove or adjust any component part of this unvented water heater; contact
the installer.
b.
If this unvented water heater develops a fault, such as a flow of hot water f
rom the
discharge pipe, switch the heater off and contact the installer.
a. This installation is subject to the Building Regulations.
b. Use only appropriate components for installation or maintenance.
Name ..............................................................................................................................................
Address ..........................................................................................................................................
Tel. No. ............................................................................................................................................
Completion date .............................................................................................................................
fig. 22
ATTENTION! The discharge pipes from the pres-
sure relief valves MUST terminate in a safe and
visible position without forming any risk to per-
sons in the vicinity.
