18
6.3 Electrical connections
In case of difficulty contact service support; contact
details are available on page 26 of this booklet.
WARNING
`
Disconnect from the mains electrical
supply before removing any covers.
`
Never attempt to replace the immersion
heater(s) other than with genuine
manufacturers components. Using
other manufacturers components may
invalidate the warranty on the cylinder.
`
DO NOT bypass the thermal cut-out(s)
in any circumstances. All electrical
wiring should be carried out by a
competent electrician and be in
accordance with the latest I.E.E Wiring
Regulations.
`
Each circuit must be protected by a
suitable fuse and double pole isolating
switch with a contact separation of at
least 3mm in both poles.
`
DO NOT operate the immersion
heaters until the cylinder has been
filled with water.
`
The immersion heater(s) should be wired in
accordance with fig 4 & 5, page 10.
Space and heating systems controls
`
The controls provided with the cylinder will ensure
the safe operation of the unit within the central
heating system. Other controls will be necessary to
control the space heating requirements and times
that the system is required to function.
`
The cylinder is compatible with most heating
controls, examples of electrical circuits are shown
in figs. 2 and 3, page 9. However, other systems
may be suitable, refer to the controls manufacturers
instructions, supplied with the controls selected,
for alternative system wiring schemes.
6.4 Filling the installation
`
Check expansion vessel pre-charge pressure. The
vessel is supplied precharged to 3.5 bar to match
the control pressure of the pressure reducing
valve. The precharge pressure is checked using
using a car tyre gauge by unscrewing the plastic
cap opposite the water connection.
`
Check all connections for tightness including the
immersion heater(s). An immersion heater key
spanner is supplied for this purpose.
`
Ensure the drain cock is CLOSED.
`
Open a hot tap furthest from the cylinder.
`
Open the mains stop cock to fill the unit. When
water discharges from the tap, alow to run for a few
minutes to throughly flush through any residue, dirt
or swarf, then close the tap.
`
Open successive hot taps to purge the system of
air.
