Glow-worm Ultracom sxi - Manual (Page 38)

38
12 Commissioning
13234
Diagram 12.3
Additionally the safe nominal maximum heat input of the
appliance can be achieved at an inlet pressure down to
15mbar.
NOTE: The BURNER PRESSURE cannot be measured and
is not used to measure the gas rate.
Gas Rate
Make sure that ALL other gas burning appliances and pilot
lights are off.
Check the gas rate using the gas meter test dial and stop
watch, at least 10 minutes after the burner has lit, see table
below for approximate rates.
In communal or LPG installations where the gas rate cannot
be measured it is acceptable to measure the combustion rate
as described in the servicing section.
On completion, press the “mode” and “+” buttons
simultaneously, this will reset the boiler.
12.6 Heating Systems
Ensure that the external controls are calling for heat.
Fully open all radiator valves, flow control valve, if fitted, see
diagram 5.1.
Switch on the appliance and ensure that the central heating is
calling for heat.
Balance the radiators as required and if fitted adjust valve to
give the required system differential. Turn off all radiators that
can be shut off by the user and check to see if less than the
maximum differential allowed of 20 o C can be achieved across
flow and return.
NOTE: Should the system require that the appliance has to
be adjusted, the front will need to be removed, as described
in the servicing section 13, and the control box lowered into its
service position.
The appliance pump has two speeds and can be adjusted
depending on the requirements of the system.
The appliance has an inbuilt automatic adjustable bypass
valve. The pressure can be adjusted between approx 1.5
and 3.5mH
2
O but is factory pre-set to approx 2.5mH
2
O.
The pressure changes by approx 0.1mH
2
O for each full turn
of the bypass screw, see diagram 12.3. Turning clockwise
increases the pressure and turning anti-clockwise decreases
the pressure.
Allow the system to reach maximum temperature then switch
off the boiler by isolating from the electrical supply.
Drain the entire system rapidly whilst hot, using the drain taps
at all the low points of the system. Fill and vent the system as
described previously.
Lock or remove the handle from control valve, if fitted.
Adjust the boiler temperature controls and any system
controls to their required settings.
13866
sxi
sxi 0.53
0.53
18.7
18.7
2.0
2.0
71.0
107.0
0.39
0.41
1.47
2.22
18
12.7 Completion
Fit the base coverplate, see diagram 12.4.
Ensure that the magnetic lighting instruction label is placed on
the surface of the boiler casing.
GB: It is a requirement that the “Benchmark” Installation,
Commissioning and Service Record is completed and left with
the user.
IE: it is necessary to complete a “Declaration of Conformity” to
indicate compliance to I.S.813. An example of this is given in
the current edition of I.S.813.