20
MAX0021B
Outline of base plate
Outline of front panels
Double arrows are from rear of boiler
70
43
119
122
35
60
54
512
514
536
560
572
544
507
DHW
TPRV
Discharge
Cold
Feed
Gas
Condensate
39
567
Dimensions are approximate
All pipes are 22mm
C/H Flow
Alternate
C/H Flow or
Condensate
Outline of insulation
46
C/H Return
550 Overall
600 o
v
er
all
2. Installation
2.1 Install the boiler
Before starting an installation, chec
k
that the correct flue
k
it and correct capacity cylinder have been supplied.
Important: When soldering plumbing fittings, do not
allow flame from blowtorch to come into contact with
the insulating foam or other non-metallic parts.
Guidance on where to locate the boiler is given in
Sections
1
.3 and
1
.
5
.
In some instances it will be
advantageous to pre-plumb pipework or to pre-fix
terminal, air/flue pipes and duct
.
1
. Remove top and front panels (see Fig.
1
) and
carefully set aside.
2. Determine boiler final position. The cutaway in the
cylinder base allows pipewor
k
to be brought up from
below floor level. Use the dimensions below or the
template on the reverse of the Installation Guide
to
pre-drill any holes.
P
ipes must not obstruct service
access to the immersion heater (if fitted) or to the
condensate trap.
3. Move boiler into position. The need to move as Top
and Bottom sections or as a complete assembly will
depend on the individual installation. The Top has 4
downward facing dowel pins which provide accurate
location on to the cylinder. Ta
k
e care to avoid trapping
hands and fingers during assembly.
4.
Apply sealant to cone faces
of both 22mm Union
Nuts (see Fig.
1
0). Remove cardboard pipewor
k
support. Attach the
15
mm x 90° branch pipe joining
the two relief valves/tundish.
5
. Remove the DHW temperature sensor from the boiler
fitting
k
it and uncoil it.
6. Drop down the boiler facia panel. Identify the electrical
connection end of the DHW temperature sensor (A in
Fig.9b).
7
.
C
onnect sensor end A to the two-pin connector (green
wires) from the control box (Fig.9c).
8
. Route the sensor cable behind the cylinder pipes and
insert end B fully (approx. 3
1
0mm) into the cylinder
poc
k
et (Fig.9a).
9. Remove small
k
noc
k
-outs as required either side of
casing for plumbing access. The handholds in the side
panels can also be used. Further access holes allow the
condensate to be routed via the
L
H panel and the DHW
to be plumbed via the RH panel.
2.2 Connect the Flue System
1
. Install the flue system as shown in accordance with these
installation instructions and the flue accessory guide,
observing additional instructions supplied with any flue
accessory.
2.3 Connect the Gas Supply (Fig. 9a)
1
. Ensure that the gas supply is isolated.
2. The gas connection to the boiler is 22 mm.
Refer to Section
1
.
1
for information on the required gas
supply.
Do not turn the gas supply on at this stage.
Fig. 9
MAX0023C
22mm Gas
Connection
-
+
PROG
SEL
PROG
SEL
-
C
.
H
.
ADVA
N
C
E
H
.
W
.
T
E
MP
R
ESE
T
B
U
R
NE
R
L
OC
K
O
U
T
MA
INS
O
N
POW
E
R
+
RWC
Gas
Coc
k
(
0pen
)
Fig. 9a
Fig. 9b
Fig. 9c
A
A
B
C
ylinder
P
oc
k
et
© Baxi Heating UK Ltd 2015