Glow-worm Ultracom cx - Manual (Page 38)

38
12 Commissioning
Diagram 12.2
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IMPORTANT
:
At the time of commissioning, complete all
relevant sections of the Benchmark Checklist located in the
centre pages of this document.
12.1 Preliminaries - All Systems
Do Not operate the boiler without water.
The commissioning should be carried out by a competent
person approved at the time by the Health and Safety
Executive and in accordance with the current issue of
BS6798.
Make sure that the system has been thoroughly flushed
out with cold water and that all cleanser if used has been
removed.
With the gas service isolation valve closed, with no demand
from any external controls and the power supply to the boiler
switched off.
Test for gas soundness and purge air from the gas supply.
12.2 Filling the Heating Circuit
Switch on the power supply to the boiler.
The boiler should be in “OFF” mode, this will be indicated
on the user interface display, refer to diagram 12.1. If not,
press the “Mode” button repeatedly until the “OFF” symbol is
displayed, then continue as follows:
1. Connect the flexible hose to the double check valve and
secure by tightening the knurled nut marked ‘A’, refer
diagram 12.2.
2. Open the Central Heating Flow and Return isolation
valves marked ‘B’ using a screwdriver or a 4mm allen key
- slot in line with the axis of the isolation valve (shown
closed in diagram).
3. Ensure ALL cold water taps are shut off then open
the Domestic Cold Water isolation valve marked ‘C’ using
a screwdriver or a 3mm allen key - slot in line with the
axis of the isolation valve (shown closed in diagram).
4. Open the tap ‘D’, then gradually open tap ‘E’ through 90 o
to fill the heating system to a pressure of 1.0bar then
close the two filling taps.
5. Vent all air from the system - repeat step 4 as necessary
until the system is full and all the air has been vented.
6. To comply with the water regulations the flexible hose
must be disconnected from the double check valve close
the taps ‘E’ and ‘D’ then undo the knurled nut marked ‘A’
and pull the flexible hose from the double check valve.
12.3 Domestic Water Circuit
Check that water flows from the hot water taps.
Check for water tightness of the complete domestic water
system.
The domestic hot water flow has a factory fitted restrictor,
which reduces the flow to a maximum of, 8.0 l/min for 24cx,
12.0 l/min for 30cx.
Commissioning should only be carried out by a competent
person approved at the time by the Health and Safety
Executive.
Diagram 12.1
CH WATER
TEMPERATURE
CONTROL KNOB
HOT WATER
TEMPERATURE
CONTROL KNOB
RESET
BUTTON
ON / OFF
SWITCH
LCD
DISPLAY
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