13
Mynute
Push-fit the twin flue pipes onto the concentric to
twin converter ensuring that the exhaust pipe
connects to the exhaust connection on the
concentric to twin converter.
If necessary cut the plain ends (male) of the twin
flue pipes to allow connection to the concentric
to twin converter.
NOTE
●
Before cutting twin flue pipes ensure
allowances have been made for connection
onto the previous piece and onto the concentric
to twin converter. The last twin flue pipes must
be pushed 50mm onto the male spigots of the
concentric to twin converter.
●
You must ensure that the entire flue system is
properly supported and connected.
●
Ensure that any horizontal sections of pipe have a
1
°
fall towards the appliance (17mm per 1000mm).
4.6
CONNECTING THE GAS AND WATER
The appliance is supplied with an accessories pack
that contains sealing washers and service valves.
The service valves are of the compression type.
When connecting pipe work to the valves, tighten
the compression end first, then insert the sealing
washers before tightening the valve to the appliance.
NOTE
It will be necessary to hold the valve with one
spanner whilst tightening with another.
4.6.1
GAS (see fig. 6)
The appliance is supplied with a 15mm service
valve, connect a 15mm pipe to the inlet of the
valve and tighten both nuts.
NOTE
It will be necessary to calculate the diameter of
the gas supply pipe to ensure the appliance has
an adequate supply of gas.
4.6.2
FLOW & RETURN (see fig. 6)
The appliance is supplied with 22mm service
valves for the flow and return connections, connect
a 22mm pipe to the inlet of each valve and tighten
both nuts.
NOTE
Depending on system requirments, it may be
Fig. 13
necessary to increase the size of the flow+return
pipe work after the service value connections.
4.6.3
SAFETY VALVE (see fig. 6)
Connect the safety valve discharge pipe to the
safety valve outlet and tighten.The discharge
pipe must have a continuous fall away from the
appliance to outside and allow any water to drain
away thereby eliminating the possibility of freezing.
The discharge pipe must terminate in a position
where any water - possibly boiling - discharges
safely without causing damage or injury, but is
still visible.
4.7
ELECTRICAL CONNECTIONS
The electrical supply must be as specified in 3.7.
A qualified electrician should connect the electri-
cal supply to the appliance. If controls - external
to the appliance - are required, a competent
person must undertake the design of any external
electrical circuits, please refer to section 8 for
detailed instructions.
Any external control or wiring must be served
from the same isolator as that of the appliance.
The supply cable from the isolator to the appliance
must be 3-core flexible sized 0,75mm to BS 6500.
Wiring to the appliance must be rated for opera-
tion in contact with surfaces up to 90
°
C.
4.7.1
CASING REMOVAL
To gain internal access to the appliance you must
first remove the casing, proceed as follows outlined
below:
●
press the controls cover to release the controls
cover catch;
●
locate and unscrew the 2 screws that secure the
controls fascia to the appliance casing (see fig. 14);
●
gently lower the control fascia until it rests;
●
remove the 2 screws located at either side of
the casing (see fig. 6);
●
lift the casing upward to disengage it from the
top locating hooks and then remove.
●
store the casing and screws safely until required.
Re-fit in the reverse order.
4.7.2
APPLIANCE TERMINAL BLOCK
The appliance terminal block is located on the
left side of the control fascia (see fig.15). Locate
and remove the screws securing the terminal
block cover.
NOTE
The appliance comes with a factory fitted link to
allow basic operation of the boiler via the mode
selector switch. If it is anticipated that external
controls will be required please refer to the wiring
diagrams in section 8 for more detailed
information.
Fig.14
Screws
Convertor box
Condensate trap
