Supplied By www.heating spares.co Tel. 0161 620 6677
Fig.46
25
5.9
GAS CONNECTION
(Fig. 46)
5.9.1
A minimum working gas pressure of 20 mbar
(8 in w.g.) must be available at the boiler inlet
at full flow rate (37 mbar for propane,
29 mbar for butane).
5.9.2
Fit gas service cock to the boiler via the
union nut and connect gas pipe. Do not
overtighten and use another spanner as
a counter force to avoid straining internal
connections.
Important consult (sect 4.5.1).
5.10
CENTRAL HEATING CONNECTION
(Fig.
46)
5.10.1
Before any central heating connections are
made to the boiler all system valves should
be opened and the system thoroughly flushed
out with cold water.
- Connect the central heating return pipe
to the isolating cock.
- Connect the central heating flow pipe to
the isolating cock marked CHF.
- Pipe dimensions and positions are
marked on template supplied and fig. 49a.
5.11
DOMESTIC HOT WATER (Fig. 46)
5.11.1
The domestic hot water circuit does not need
a safety valve but it is essential to ensure
that the pressure of the cold water supply
does not exceed 10 bar. If in doubt it is
advisable to install a pressure reducing valve
The minimum pressure needed to operate
the domestic hot water system is 0.5 bar with
a flow of approx 3 Lts per min. Flush out all
foreign matter from the supply pipe before
connecting to the appliance.
- Connect the 15 mm. cold water pipe to the
stop cock to the appliance inlet.
- Connect the 15 mm. hot water pipe to the
cock to the appliance inlet.
5.12
SAFETY VALVE DISCHARGE
5.12.1
The safety valve is located near the pump.
It has a 15 mm copper to permit a
discharge pipe to be connected.
When connecting ensure the discharge pipe
does not restrict access. The discharge
should terminate facing downward
exterior to the building in a position where
discharging (possibly boiling water & steam)
will not create danger or nuisance, in easily
visible position, and not to cause damage to
electrical components or wiring.
The discharge must not be over an entrance
or a window or any other type of access
5.13 ELECTRICAL
CONNECTIONS
5.13.1 IMPORTANT:
Electricity supply must be as
specified in clause (sect. 4.10)
- When controls external to the appliance
are required, design of the external
electrical circuits should be undertaken by a
competent person. In accordance
with the IEE wiring regulations.
It is essential that all external controls
MUST VOLT FREE.
Factory fitted internal wiring must not
be disturbed when wiring external controls.
- To gain access to the electrical box
remove the front panel of the case as
described in clauses sect. 8.1.4 (Fig.54),
remove the two securing screws on the
supporting bracket and lower down ,
unclip the four plastic tabs and lift off the
electrical box cover (Fig.65).
- The terminals are easily visible on the front
of the electronic control board (Fig. 48).
- Heat resistant flexible cable is fitted
between the isolator and the terminal block
A 3 core cable of 0.75 mm
2
(24x0,2 mm) to
BS 6500.
Make sure all wires to the appliance are
routed away from sharp edges and hot
surfaces.
The cable must be fastened with its cord
anchorage and connected so that should
the cable slip from the anchorage the
current carrying conductors become taut
before the earthing conductor. Securely
tighten all terminal screws and arrange
the cable with slack between the cord
anchorage and the terminal block
WARNING: If the supply cord is damaged,
it must be replaced by a service engineer
(supply cord available from Ravenheat
Manufacturing Ltd).
