Glow-worm Ultracom2 sxi - Manual (Page 28)

0020092785_02 - 05/10 - Glow-worm
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12.6 Testing heating system
• Ensure that the external controls and programmer are calling
for heat.
• Fully open all radiator valves, see chapter "Appliance
installation ► Recommendations before installing ► Heating
circuit design".
• Activate the C.H. function on the appliance's control panel.
• Balance the radiators as required 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°C can be achieved across flow and return.
i Should the appliance require adjustment refer to
specific adjustment section overleaf.
• 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 in chapter "Commissioning
► Filling the CH system (Central heating)".
• Adjust the boiler temperature controls and any system
controls to their required settings.
12.7 Testing domestic hot water system
• Check that the temperature obtained is compliant with the
setting on the appliance (Smart wiring centre only).
12.8 Completion
• 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.
13 Specific adjustment
13.1 Heating circuit adjustment
It may be necessary to adjust the by-pass to the design of the
system. The boiler is delivered pre-set open 1/2 turn (1).
1
Key
1 Screw for by-pass
• Depending on the design of the system the by-pass may
need further adjustment. It is adjusted clockwise to close and
anti-clockwise to open. This should be balanced to ensure
that it operates if the pump output is adjusted.
Output/pressure curve Ultracom
2
12sxi / 18 sxi
60
50
40
30
20
10
0 500 1000 1500
B
1 2 3 4
Key
A Available pressure between heating flow and return (kPa)
B Heating circuit flow rate (l/h)
1 Speed min, bypass closed
2 Speed max, bypass closed
3 Speed max, bypass middle position
4 Speed max, bypass opened
Output/pressure curve Ultracom
2
30sxi
60
50
40
30
20
10
0 500 1000 1500
B
1 2 3 4
Key
A Available pressure between heating flow and return (kPa)
B Heating circuit flow rate (l/h)
1 Speed min, bypass closed
2 Speed max, bypass closed
3 Speed max, bypass middle position
4 Speed max, bypass opened
INSTALLATION