Fitting The Appliance - Baxi Boston 2 80 RS Installation And Servicing Instructions

Fitting the Appliance – page 5
PREPARATION
1) Ensure that the floor is sound and level.
2) Ensure that the length of the flue terminal is suitable for
the wall thickness.
3) Select the most suitable position for the boiler (Figs 1 & 4).
4) Mark the position of the flue opening.
5) Cut out the hole for the flue.
6) Measure the wall thickness, assemble the flue terminal to
the back of the appliance and adjust until the dimension
from the back of the inlet air duct to the edge of the lip on
the terminal mesh is 12mm (½ in) more than the wall
thickness.
THE FOUR SCREWS SECURING THE TERMINAL
MESH TO THE FLUE DUCT MUST BE ACCESSIBLE
FROM OUTSIDE THE BUILDING.
Tape the joint between the flue terminal assembly and the
air duct (Fig. 1).
7) Manoeuvre the boiler into position until the two spacer pips
behind the air inlet duct touch the wall (Fig. 1).
8) Check that the flue terminal protrudes through the wall as
detailed in 6) and make good.
9) Connect the water flow and return pipes (see 'Boiler
Connections').
10) Complete connection to the gas supply (see
'Gas Connection').
11) Fit the outer case as described in 'Outer Case' items 1 to
5.
12) Connect the electrical supply (see 'Electrical Connections'
page 7).
13) Complete the installation as outlined in 'Commissioning
the Unit' page 10.
14) Complete the assembly of the outer case as described in
'Outer Case' items 6, 7 and 8.
BOILER CONNECTIONS (Fig. 2)
The boilers have 5 water connections:
2 x Rp1 (1 in BSP internal) return connections.
2 x Rp1 (1 in BSP internal) flow connections.
1 x Rp¾ (¾ in BSP internal) flow connection.
The 1 x Rp¾ (¾. in BSP internal) flow connection is for use
when the pump is fitted inside the outer case. For other
installations this connection must be plugged.
THE WATER SPREADER MUST BE FITTED TO THE
PUMPED RETURN CONNECTION ON ALL INSTALLATIONS.
THE MARKS ON THE SPREADER MUST BE BETWEEN THE
TWO MARKERS ON THE COMBUSTION CHAMBER (Fig. 3).
WARNING: Overtightening of the water spreader may
damage the heat exchanger. Do not apply excessive
amounts of sealing tape to the thread of the spreader.
The spreader has one mark on the 80, 70, 60 and has two
marks on the 50, 40.
When installing the pipework ensure that:
a) Suitable union fittings are used at the first joint of all boiler
connections.
b) The pipework will run through the cutouts provided in the
outer case (Fig. 4).
c) Drain off points are provided as appropriate.
d) Pipe sizes are suitable for the system design.
PUMP (Fig. 5)
A suitable pump e.g. Grundfos UPS 15-50, 15-60 or equivalent
Myson or Wilo with ball type isolating valves and 22mm
compression fittings may be fitted inside the outer case. The
pump should be connected to the ¾ in
flow connection on the front of the heat exchanger using the
following standard fittings.
A - 1 off - Elbow ¾ BSP male x ¾ BSP female
B - 1 off - Conex straight connector ¾ BSP male x 22mm
copper
C - 3 off - 22mm Yorkshire elbow
D - 1 off - when installing the 50 and 40
52mm long - 22mm copper tube
D - 1 off - when installing the 80, 70 and 60
92mm long - 22mm copper tube
E - 1 off - 100mm long - 22mm copper tube
F - 1 off - 145mm long - 22mm copper tube
G - 1 off - 42mm long - 22mm copper tube
The redundant flow connection(s) must be plugged.
Accuracy is important to avoid the pump and or pipework
obstructing removal of the top panel of the combustion
chamber, or fouling the top panel of the outer case.
THE PUMP MUST NOT BE FITTED WITHIN THE
OUTERCASE WHEN THE UNDER WORK SURFACE TOP
PANEL IS USED.
OUTER CASE (Fig. 6)
Assemble the outer case in the following manner:
1) Locate the RH side panel over the pegs at the RH side of
the base and press downwards to secure. When fitting the
panels if access is restricted the cutouts at the top of the
back edge of the panels can be used to pass the case
fixing brackets.
2) Secure the panel to the case fixing brackets with two of the
six screws provided.
(When the under work surface top panel is being fitted then the
RH and LH side panels are fixed only by the screws at the front
of the panel as access to the top screws may be limited. The top
panel is then slid back to the wall and secured to the side
panels by the facia securing screws in figure 6.)
3) Repeat 1 & 2 with the LH side panel.
4) Secure the hinges of the facia panel to the two side panels
using two of the six screws provided.
5) At this point the electrical connections to the facia panel
can be made and the appliance can be commissioned.
(See 'Electrical Connections' and
'Commissioning the Appliance').
6) Swing the facia panel upwards and secure to the side
panels using the two screws retained to the control facia.
7) Locate the top panel above the side panels and press
down to secure.
8) Hook the bottom edge of the front panel over the lugs on
the base and swing the top edge back till the pegs at the
top of the panel locate in the corresponding holes. Press to
secure.
GAS CONNECTION (Fig. 2)
Adapt the gas supply 15mm (½ in BSP) within the outer case
making the gas connection to the service tap provided.