Ravenheat HE Primary AAA, Instructions For Use Installation And Servicing

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Supplied By www.heating spares.co Tel. 0161 620 6677
Fig. 48
26
6.5 SETTING THE SYSTEM DESIGN
PRESSURE
6.5.1 The design pressure must be a min 1 bar
and max 1.5 bar These fi gures are read off
the pressure gauge.
- The actual reading should ideally be 1 bar
+ the height in metres to the highest
point of the system above the base of the
appliance (up to a max of 1,5 bar).
N.B. The safety valve is set to lift a 3 bars
(30 mt).
- To lower the system pressure to the
required value remove drain point
or drain on the heating circuit.
6.6 LIGHTING THE BOILER (Fig. 50)
Before lighting the burner make sure
that any heating circuit fl
ow and return
valves are open.
- If external controls are installed (e.g.
timeclock and thermostat) make sure
that they call for heat.
- Press On/Off switch to On (Fig.50)
- Turn control thermostat up to its
maximum setting.
- Now the Burner should turn on
With leak detection fl uid test for gas
soundness of all gas components and
joints.
- See paragraph 6.14 for regulating the
heating circuit thermostat.
CHECK GAS MAINS PRESSURE (Fig. 51)
Fit a gas pressure gauge on pressure inlet
77 on the gas valve, after releasing the seal
screw.
Check the gas mains pressure with boiler
operating.
Check with the Local Gas supplier if the
pressure differs signifi cantly from 20 mbar
(natural gas), 37 mbar (G31) and 29 mbar
(G30).
SECTION 6
COMMISSIONING
6.1 Each boiler has been through a rigorous
operational procedure at our factory and
should not require any further adjustment.
If in the unlikely event of the appliance not
operating correctly, please turn to the Fault
Finding and Logic Sequence charts.
6.2 GAS SUPPLY INSTALLATION
6.2.1 Inspect the entire installation including the
gas meter, test for soundness and purge, all
as described in BS 6891
.
6.3 ELECTRICAL INSTALLATION
Preliminary electrical systems checks to
ensure electrical safety shall be carried out
by a competent person (earth continuity,
polarity, resistance to earth). Those checks
are outlined in the «Instructions for British
Gas Multimeter» Booklet.
If a fault has occurred on the appliance the
fault fi nding procedure should be followed as
specifi ed under the servicing section of this
document.
6.4 INITIAL FILLING OF THE SYSTEM
- Gradually fi ll the heating system until water
is heard to fl ow.
- Starting with the lowest radiator open
each air release tap in turn. Close it
only when clear water, free of bubbles,
fl ows out In the same way release air from
any high points in the pipework.
- Inspect the system for water soundness
and remedy any leaks discovered.
ELECTRICAL CONNECTION