15
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 installation
of the system, consequently it is essential that the
system be flushed in accordance with the follow-
ing 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 valves
(AAV) and loosen the dust cap/s by turning the cap
anti-clockwise one full turn.
IMPORTANT, THERE ARE NO MANUAL AIR
RELEASE VALVES LOCATED ON THE APPLI-
ANCE
. Ensure all manual air release valves lo-
cated on the heating system are closed.
Connect the filling loop as shown in fig. 5, slowly
proceed to fill the system by firstly opening the
inlet valve connected to the flow pipe, and then
turning the lever on the fill valve, to the open
position. As water enters the system the pressure
gauge will begin to rise. Once the gauge has
reached 1 BAR close both valves 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 sound-
ness, rectifying any leaks.
5.4
INITIAL FLUSHING OF THE SYSTEM
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 valve. 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
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 7.8) 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.
5.6
INITIAL LIGHTING
Ensure the electrical supply to the appliance is
switched on. Press the ON/OFF switch to switch
the appliance ON (indicated by active display),
ensure any external controls are switched to an
‘ON’ position and are calling for hea.
Press the function button and select “Winter mode”,
the appliance will now operate in the “Winter mode”
as described in 1.2. Should the appliance fail to
ignite, refer to 5.6 and/or section 7 (mode of
operation, parameter setting, & faultfinding).
5.7
CHECKING GAS PRESSURE AND COMBUS-
TION ANALYSIS
The appliance is factory set and should require no
additional adjustment once installed. However, if
the gas valve has been adjusted, or the appliance
has been converted for use with another gas type,
then it’s necessary to carry out a combustion
analysis/check to ensure that correct combustion
is occurring. Details on how to carry out the
combustion analysis can be found in section 7.
IMPORTANT
It’s imperative that a sufficient dynamic - gas -
pressure is maintained at all times. Should the
dynamic gas pressure fall below an acceptable
level, the appliance may malfunction or sustain
damage.
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 20 °C - 80 °C via the Heating thermostat
knob (see fig.1).
5.9.1
INFORMATION MODE
The appliance keypad can be used to display
certain information on the working status of the
boiler. Push the Info button ( ) to enter the info
menu (fig. 17).
SECTION 5 COMMISSIONING
Fig. 17