Potterton Isis HE Installation, Operation & Maintenance Manual page 24

POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
ISIS HE
Boiler Controls
The operation of boiler controls including control
thermostat, high/low
thermostat should be checked on an annual basis
and the burner recommissioned as detailed below.
Safety Interlocks
The operation of safety interlocks such as flow
proving on mechanical flue/ventilation systems
should be checked to ensure that operation of the
boiler is prevented on a fault.
COMMISSIONING
IMPORTANT: The boiler must be commissioned
following completion of installation. Operation of
an uncommissioned appliance may cause injury
to personnel and damage to the boiler/burner unit
and could invalidate
warranties.
Commissioning should only be carried out by
personnel approved and competent to do so. This
facility is available from Potterton Commercial
Service Offices at the addresses as listed on the
back page of this manual.
Commissioning of the burner unit should be carried
out in accordance with the burner manufacturers
handbook provided with combustion adjustments in
accordance with the Potterton burner data sheet also
provided.
Before commencing to commission the burner check
the following.
1. Electrical supply is of correct voltage and polarity
and earthing is available.
2. Fuel supply is tested for leakage and purged of
air. Ensure the burner is suitable for the
connected fuel supply and pressure.
3. Boiler and system are fully flooded with water
and the operating pressure is within the
appliance
4. Pumps are operational and any flow proving
interlocks are functional. The operation of the
pump should be checked, particularly on sealed
systems, to ensure that operation does not cause
a reduction in pressure within the system below
the minimum operating pressure. See section 3
for further details on water circulation systems.
5. Ventilation is adequate and, in the case of
mechanical ventilation systems, operation of the
thermostat and overheat
the manufacturers
range.
boiler is inhibited unless the ventilation fan is
proved.
6. On mechanically assisted flue systems the
operation of the boiler plant should be inhibited
unless the mechanical flue system is operational
and flow proved.
7. The safety valve should be checked to ensure
that it is of the correct size and pressure. See
Section 3 for further details.
8. The cold feed and open vent sizes should be
checked. See Section 3 for further details.
9. Ensure the burner fitted to the boiler is of the
correct specification and size for the boiler and
suitable for the
10. The burner blast tube has been sealed to the
door refractory and the boiler door seal is correct.
See Section 4 for further details.
11. The sight glass cooling tube is connected
between the boiler sight glass and burner body.
IMPORTANT: Operation of the burner without the
cooling tube connected can lead to boiler damage
and a hazardous condition occurring.
12. The boiler door micro switch prevents operation
of the burner when door seal is broken.
13. The boiler inserts have been correctly fitted, see
Section 4.
Following completion of the above checks the burner
should be commissioned in accordance with the
burner manufacturers handbook provided with the
burner. The combustion figures, etc. should be
completed on the commissioning form provided at
the back of this manual and returned to Potterton
Commercial at the address on the back page.
IMPORTANT: The boiler/burner units are supplied
in accordance with Potterton Commercial Quality
Assurance plan registered
requirements of BS 5750 Part 2. A condition of
the supply of the appliance for compliance with
this Quality Assurance plan is the return of the
appliance commissioning report.
Following/during commissioning of the burner unit the
following additional checks should be carried out.
14. Operation of the control, high/low and high limit
thermostats should be checked for correct
operation.
SECTION 5
PAGE 21
fuel supply available.
to meet the