SIME FORMAT WALL HUNG BOILERS
MODEL 34i AND MODEL 34e
REF: INSTALLATION INSTRUCTIONS 19/02/04
12
2.6 Central Heating Connection
a) Before any connection of the central heating system is made to
the boiler, the system should be thoroughly flushed through to
remove any dirt and foreign matter which could damage the
pump and other devices in the boiler.
b) The connection to the boiler are by G¾” male threads.
c) When an auto-fill valve is used, it must be installed to the cold
fill inlet. It is recommended that after filling the boiler and
adjusting the pressure setting, the manual shut-off valve be
closed. It is also recommended that a manual shut off valve be
installed before the AFV for maintenance purposes.
d) The system should be filled to a cold static pressure of 1.5 bar,
filling to be carried out slowly and all air bled from the system.
Should the system pressure drop below 0.8 bar, the boiler will
not operate until the pressure is restored to 1.5 bar.
e) The drain pipe from the 3 Bar pressure relief valve in the boiler
must terminate in such a position that any discharge is visible
to the user. (See Fig 3)
f) The boiler is provided with an automatic by-pass, which
operates on systems fitted with thermostatic radiator valve.
g) The condition of the water in the system is of great importance.
Treatment, such as Fernox, is recommended, to reduce the
effect of sludge and scale on the efficiency of the heating
system.
h) For installations where the heater is connected to larger
systems, the additional volume will need to taken into account.
A temperature pressure relief valve may be needed for such
installations.
2.7 Electrical Connection
a) The electrical connection is made to a standard 10amp 3 pin
outlet. It is essential that a positive earth be made for the
satisfactory operation of the boilers.
THIS MUST BE FITTED BY A QUALIFIED ELECTRICIAN
b) The room thermostat is connected to terminals 2 & 4 in the
control box (see note on Fig. 9.) The thermostat must be
capable of operating 240V AC, and the relative wiring should
also be the same.
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