Heatrae Sadia 7037042, Инструкция по установке, эксплуатации и обслуживанию

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15
7.1 General
WARNING
DO NOT operate the immersion until the
water heater has been filled with water.
7.2 Checklist before commissioning
`
Check that all installation and discharge pipe
requirements have been met.
`
Check expansion vessel pre-charge pressure. The
vessel is supplied precharged to 0.35MPa (3.5
bar) to match the control pressure of the Pressure
Reducing Valve. The pre-charge pressure is
checked using a car tyre gauge by unscrewing the
plastic cap opposite the water connection.
`
Check all water connections are tight.
`
Check all electrical connections are tight.
`
Check all earth bonding links are connected, tight
and un-damaged.
`
Check earth continuity, short circuits, polarity and
resistance to earth.
7.3 Commissioning procedure
`
Open a hot tap furthest from the water heater and
turn on the water supply to the water heater.
`
Allow water heater to fill and leave hot tap running
for a short while to purge any air and flush out the
pipework.
`
Open successive hot taps to purge the system of
air.
`
Check all water connections for leaks and rectify
as necessary.
`
Turn off mains water supply.
`
Remove the Pressure Reducing Valve head work
to access the strainer mesh, clean and re-fit, see
Figure 9, page 17.
`
Turn the water supply back on.
`
Manually open, for a few seconds, each relief valve
in turn, checking that water is discharged and runs
freely through the tundish and out at the discharge
point.
`
Ensure that the valve(s) reseat satisfactorily.
`
If necessary set the temperature control knob to
the desired setting (see figure 8, page 16). Factory
setting is 54
o
C.
`
Switch on the electrical supply. The indicator
light will illuminate during heating. When the set
temperature is reached the indicator light will go
out.
`
The set temperature can be adjusted by rotating the
control knob. This can be set to give temperatures
in the range 10°C to 70°C (see figure 8, page 16).
In hard water areas it is advised that the maximum
temperature is restricted to prevent build up of
scale. Temperatures above 55
o
C can scald so
consideration should be given to blending at the
point of use to a safe user temperature.
6.3 Electrical connections
`
Check that the electrical supply is of sufficent
current rating and voltage, see Technical Data
page 5.
`
A 2 metre length of flexible cable is supplied
factory fitted. The cable specification is H05VV-F
3G 2.5mm
2
. If replacing or extending the same
specification of cable should be used.
`
The flexible cable must be wired into an
appropriately fused switched spur.
`
The conductor sheaths are colour coded as follows:
Green and Yellow EARTH
Brown LIVE (L)
Blue NEUTRAL (N)
In case of difficulty contact service support; contact
details are available on page 28 of this booklet.
7. Commissioning
WARNING
`
Disconnect from the mains electrical
supply before removing any covers.
`
Never attempt to replace the
immersion heater other than with the
recommended immersion heater.
`
DO NOT bypass the thermal cut-out
in any circumstances. Ensure the two
spade terminations on the wires from
the thermostat and thermal cut-out are
pushed firmly into the corresponding
terminations on the element plate
assembly.
`
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 heater
until the appliance has been filled with
water.