Edge of Boiler | Example | |
2m | ||
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Horizontal
Side Flue
Centre Line
Centre
125mm
Example
V = 55mm
EXAMPLE: If the boiler is 2 metres away from corner of wall the flue duct hole will be 55mm higher than the horizontal side flue centre line. This will maintain an approx. 1.5° backfall to the boiler. It is especially important to consider this when fitting the boiler under a work top !
10.0 Installation
Check Site Requirements before commencing.
10.1Initial Preparation & Installation
1.Remove the outer carton.
2.For the boiler to operate correctly it must be level in both planes. Place the fixing template in the proposed boiler position ensuring that it is level.
3.Mark the centre of the flue hole (rear exit).
For side exit: project the horizontal side flue centre
Hole
Template
Fig. 20
Wall Thickness | Flue Hole ø |
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up to 227mm | 125mm core drill |
up to 750mm | 150mm core drill |
up to 1200mm | 175mm core drill |
line into the corner of the room and along the wall to where the flue hole will be drilled. (Fig. 20).
The diagram (Fig. 21) shows the dimensions required to ensure any horizontal flue is installed with the correct fall to the boiler. Mark the offset (V) dimension and if required, mark the position of the gas, water and condensate pipes. Remove the template.
Backfall to the boiler, ie. 2m flue offset (V) position 55mm
4. Cut the hole for the flue (minimum diameter |
125mm, see table (Fig. 20) for wall thicknesses and flue |
Flue Duct Hole OffsetV (mm)
13.5 | 27.5 | 55 | 82.5 | 110 (mm) |
hole diameters). |
5. Complete any pipework and wiring that will be |
V
0.5
1.0
2.0
3.0
4.0
(metres)
1.5°
inaccessible once the boiler is in position. | ||
6. Undo the securing screws and remove the facia, | ||
front door panel and top panel (see Figs. 1 & 2 on | ||
page 6). Remove the securing screw and disengage the | ||
pipe access panel. | ||
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10.2 | Making the Water Connections | |
1. If desired the flow and return tails supplied with the | ||
boiler can be fitted at this stage and secured with the | ||
spring clips. The flow and return connections are | ||
identified on the boiler rear panel. The flow pipe | ||
incorporates a manual air vent. | ||
Fig. 21
Flow 
Tail
Return 
Tail
Transit 
Bracket
Gas 
Connection
Hole for
Electrical
Cable
Hole for
Condensate
Drain Outlet
Fig. 22
2. Note that the seal is made by use of an ‘O’ ring, | |
therefore some pipe movement will be evident even | |
though a water tight seal has been achieved. Excessive | |
force could result in damage to the connection. | |
3. Make all soldered joints before connecting the tails | |
to the boiler to avoid damaging the ‘O’ rings. | |
4. Refit the pipe access panel. | |
10.3 | Making the Gas Connection |
1.The connection to the boiler is a 15mm tail on the gas service cock. The tail protrudes through the boiler rear panel and is protected by a transit bracket which may be removed to aid connection (see Fig. 22).
2.If solder joints are being used for the gas connection, remove the gas tap from the valve as excessive heat may damage the ‘O’ ring seal.
10.4Priming the Condensate Trap
1.Using a funnel and tube, carefully pour approximately 1 cupful (250ml) of tap water into the flue products exhaust at the terminal or flue elbow sampling point to ensure a seal is made in the trap.
© Baxi Heating UK Ltd 2011 |
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