Boiler Installation And Dimensions - Baxi 45 HTE Installation, Operation And Maintenance Manual

To ensure correct operation of the appliance and avoid invalidating the guarantee, observe the following
precautions:
1. Hot water circuit:
If the water hardness is greater than 20 °F (1 °F = 10 mg calcium carbonate per litre of water) a
polyphosphate or comparable treatment system responding to current regulations.
2. Heating circuit
2.1. new system
Before proceeding with installation of the boiler, the system must be cleaned and flushed out thoroughly to
eliminate residual thread-cutting swarf, solder and solvents if any, using suitable proprietary products.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non
alkaline. The recommended products for cleaning are:
SENTINEL X300 or X400 and FERNOX heating circuit restore. To use this product proceeding strictly
in accordance with the maker's directions.
2.2. existing system
Before proceeding with installation of the boiler, the system must be cleaned and flushed out to remove
sludge and contaminants, using suitable proprietary products as described in section 2.1.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-
alkaline such us SENTINEL X100 and FERNOX heating circuit protective. To use this product proceeding
strictly in accordance with the maker's directions.
Remember that the presence of foreign matter in the heating system can adversely affect the operation
of the boiler (e.g. overheating and noisy operation of the heat ex­changer).
Failure to observe the above will render the guarantee null and void.

10. boiler installation and dimensions

Install the boiler in a position that ensures easy maintenance. You must be able to fully open the front access
door and have adequate access to the rear of the boiler.
If possible, install the boiler on a raised base of 200 mm in height to facilitate drainage of flue condensate.
When calculating the weight of the boiler on the floor, bear in mind the weight of the water in the heat ex­changer
(see table 1).
Adjust the levelling feet to compensate for any unevenness in the floor.
Install the necessary utility connections starting from the water and gas connections on the rear of the boiler
(see table 1 for fitting type and size).
The following steps are strongly recommended:
• Install two shut-off valves, one on the heating circuit delivery pipe (MR) and the other on the return pipe (RR)
so that you can service the boiler without having to drain the entire heating system.
• Use a metal pipe to connect the boiler's gas connection to the gas supply point, and fit a (mandatory) shut-
off valve upstream from the boiler.
• Fit three-part joints in the water and gas connections to and from the boiler to separate it mechanically from
utility supplies.
• Fit a water separator (header).
• Install an automatic water filling system to keep the heating circuit full.
These appliances do not have any circulation pump, expansion tank or safety valve. These devices
must therefore be provided elsewhere in the system, and must be sized to suit the system's thermal
capacity.
Connect the flue condensate drain pipe to a suitable water drain, ensuring an adequate slope.
IstructIons pErtaInIng to thE InstallEr
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