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6
COMMISSIONING
6.1 Gas supply installation
Inspect the entire installation including the gas meter, test for sound-
ness and purge. Refer to BS 6891 for specific instruction.
6.2 Water pipe work
The water pipe work shall be flushed and tested in accordance with the
Water Supply (water fittings) Regulations (Water Byelaws Scotland).
6.3 Pre-operation checks
Before attempting the initial lighting of the appliance, 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 8.6
ELECTRICAL CHECKS), particularly continuity, polarity and resis-
tance to earth;
- ensure the 3 amp fuse – supplied with the appliance – has been
fitted;
- ensure the appliance and associated pipe work has been filled and
vented;
- ensure the flue system has been fitted properly and in accordance
with the instructions;
- ensure all appliance service valves are open.
6.4 Initial lighting
Ensure the electrical supply to the appliance is switched on. Turn the
selector knob to the 'on' position. Open a hot water outlet (preferably a
bath tap) and ensure the flow rate exceeds 2 litres per minute.
The appliance will now go through an ignition sequence as described
in 3.3 MODE OF OPERATION. Should the appliance fail to ignite, re-
fer to 6.3 PRE-OPERATION CHECKS and/or section 8 CHECKS, AD-
JUSTMENTS, AND FAULT FINDING.
6.5 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 nipple.
Outlet test
nipple
Inlet test
Light the appliance as described in 6.4 INITIAL LIGHTING and com-
pare the reading on the manometer with the values described in 2.2
TECHNICAL DATA. If adjustement is required, follow the detailed in-
structions in section 8.3 CHECKING AND ADJUSTING BURNER
PRESSURE. Once the burner pressure has been checked, isolate the
appliance from the electrical supply, remove the manometer, and tight-
en the gas valve outlet test nipple.
6.6 Setting the outlet temperature
The hot water outlet temperature can be adjusted between 35°C -
60°C via the thermostat knob.
6.7 Final checks
b
Ensure all test nipples on the appliance gas valve are tight and
checked for tightness.
b
Ensure the appliance flue system is fitted correctly and is prop-
erly secured.
b
Ensure all pipe work is re-checked for tightness.
b
Re-fit appliance casing.
b
Complete benchmark checklist. For uk only
Complete details of the appliance, controls, installation nd commis-
sioning in the Benchmark checklist at the back of this book. It is import-
ant that the Benchmark checklist is correctly completed and handed to
the user. Failure to install and commission the appliance to the manu-
facturers instructions will invalidate the warranty.
6.8 Instructing the user
Hand over all documentation supplied with this appliance – including
these instructions – and explain the importance of keeping them in a
safe place.
Explain to the user how to isolate the appliance from the gas, water
and electricity supplies, and the locations of all drain points.
Show the user how to operate the appliance and its controls correctly.
Explain to the user how to turn off the appliance for both long and
short periods, and advise on the necessary precautions to prevent
frost damage.
Explain to the user that for continued safe and efficient operation, the
appliance must be serviced annually by a competent person.
cap
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