Potterton Promax 12 SL Installation And Service Instructions Manual page 31

Remove the red pipe
protection caps
Suggested Lifting
Points shown as
shaded area
Flue Products Exhaust
Fig. 25a
© Baxi Heating UK Ltd 2007
Retaining Bracket
Fig. 24
Return Pipe Connection
10.0 Installation
10.3
1. Obtain retaining bracket and two M6 nuts from fitting
bag.
2. Offer up the boiler to the wall plate using the lifting
points shown in Fig. 24 and locate the rear bottom edge
onto the self locating support at the base of the wall plate.
(See Safe Manual Handling page 5.)
NOTE: When installing in a Loft/Small Compartment,
access for lifting the boiler from the front can be
gained for two people using the lifting points. (Fig. 24).
3. Rotate the boiler up to wall plate and engage retaining
bracket, securing with the two nuts.
4. Ensure the boiler is secured with the retaining
bracket.
5. Remove red pipe protection caps from the FLOW and
RETURN connections.
Wall Plate
10.4
1. The boiler has two side water connections which are
labelled FLOW and RETURN. The front connection is the
flow pipe and the rear threaded connection is the return.
2. It is essential that the flow and return pipes are
connected to the boiler correctly. The flow connection
incorporates the boiler thermostats and a flow switch.
3. The boiler connections will accept 22mm fittings.
NOTE: On 30 models 28mm pipe should be used to
connect to the boiler flow and return using suitable
reducing fittings.
Flow Pipe
4. If the installation requires that the system pipework
Connection
originates from the bottom of the boiler, then the flow
Fig. 25
and return pipes will need cutting, as they terminate
upwards.
10.5
1. Connect the condensate drain using the 1"BSP nut and
seal supplied. (see section 7.6).
NOTE: To ensure the correct operation and
integrity of the condensate drainage system -
Carefully pour approximately 1 cupful (250ml) of
water into the flue products exhaust, at the top of the
heat exchanger (Fig. 25a) to ensure a seal is made in
the trap.
Fitting The Boiler
(Fig. 24)
Making the Water Connections
(Fig. 25)
Making the Condensate Drain Connection
31