Supplied By www.heating spares.co Tel. 0161 620 6677
14
5.1
GAS SUPPLY INSTALLATION
Inspect the entire installation including the gas
meter, test for soundness and purge. Refer to BS
6891 for specific instruction.
5.2
THE HEATING SYSTEM
The appliance contains components that may
become damaged or rendered inoperable by oils
and/or debris that are residual from the installa-
tion of the system, consequently it is essential
that the system be flushed in accordance with the
following instructions.
5.3
INITIAL FILLING OF THE SYSTEM
Ensure both flow and return service valves are
open, remove appliance casing as described in
4.7.1, identify the automatic air release valve and
loosen the dust cap by turning the cap anti-
clockwise one full turn. IMPORTANT, THERE
ARE NO MANUAL AIR RELEASE VALVES LO-
CATED ON THE APPLIANCE. Ensure all manual
air release valves located on the heating system
are closed. Connect the filling loop (not supplied)
and slowly proceed to fill the system. As water
enters the system the pressure gauge will begin
to rise. Once the gauge has reached 1 BAR close
the filling loop and begin venting all manual air
release valves, starting at the lowest first. It may
be necessary to go back and top-up the pressure
until the entire system has been filled. Inspect the
system for water soundness, rectifying any leaks.
5.4
INITIAL FLUSHING
The whole of the heating system must be flushed
both cold and hot as detailed in 5.8. Open all
radiator or heating valves and the appliance flow
& return service valves. Drain the boiler and
system from the lowest points. Open the drain
valve full bore to remove any installation debris
from the boiler prior to lighting. Refill the boiler
and heating system as described in 5.3.
5.5
FILLING THE HOT WATER SYSTEM
Close all hot water outlets, turn appliance stop-
cock to the normal operating position (fully coun-
ter clockwise), slowly open each outlet until air
has been expelled and clear water is discharged.
Check pipe-work etc. for water soundness.
5.6
PRE-OPERATION CHECKS
Before attempting the initial lighting of the appli-
ance, the following checks must be carried out:
●
ensure all gas service valves from the meter to
the appliance are open and the supply pipe has
been properly purged
●
ensure the proper electrical checks have been
carried out, (see 7.7) particularly continuity,
polarity and resistance to earth
●
ensure the 3 AMP fuse - supplied with the
appliance - has been fitted
●
ensure the system has been filled, vented and
the pressure set to 1 BAR
●
ensure the flue system has been fitted properly
and in accordance with the instructions
●
ensure all appliance service valves are open.
SECTION 5 COMMISSIONING
5.7
INITIAL LIGHTING
Ensure the electrical supply to the appliance is
switched on. Move the selector switch to the
Heating & Hot Water position, ensure the time
clock is switched to an ‘ON’ position and ensure
any other external controls (room thermostat for
example) are also calling for heat.
The appliance will now operate in the mode as
described in 1.2. Should the appliance fail to
ignite, refer to 5.6 and/or section 7 (faultfinding).
5.7.1
CHECKING THE BURNER PRESSURE
Although the burner pressure is factory set, it is
necessary to check it during commissioning. Isolate
the appliance from the electrical supply and attach
a suitable manometer to the gas valve outlet test-
point (see fig. 14). Light the boiler as described in
5.7, turn the Hot Water temperature selector to
maximum, and open fully a DHW outlet (preferably
the bath), allowing the appliance to stabilise.
Compare the reading on the manometer with the
value described in 2.3. If adjustment is required,
follow the detailed instructions in section 7 (7.3).
Once the burner pressure has been checked, close
the DHW outlet, isolate the appliance from the
electrical supply, remove the manometer and
tighten the gas valve outlet test nipple.
5.8
FINAL FLUSHING OF THE HEATING SYSTEM
The system shall be flushed in accordance with
BS 7593. Should a cleanser be used, it must be
suitable for Copper and Aluminium heat exchang-
ers. It shall be from a reputable manufacturer and
shall be administered in strict accordance with the
manufacturers’ instructions and the DWTA code
of practice.
5.8.1
INHIBITORS
See section 3 “General requirements”.
5.9
SETTING THE BOILER OPERATING TEMPERA-
TURE
The flow outlet temperature can be adjusted be-
tween 40 ºC - 80 ºC via the Heating thermostat
knob (see fig.1).
Fig. 14
Protective
cap
Outlet
test-point
Inlet
test-point
