2
Réf. : CI - 389 - C
1. C
ommissioning
BAXI does not accept any liability for damage caused
by work that does not comply with these instructions
and/or which has not been carried out by a qualified
installer.
1 - 1 Filling
- Water quality for the heating system
Avoid using hard water, which may scale the boiler. If TH
or total hardness is above the French 25°, the boiler
should be filled with softened water.
- Filling the boiler and heating system
While filling, which must be done slowly, ensure that the
stop valves are open and that the mixing valve can be 1/
2 open.
The automatic drain cock plug, normally fitted on the
boiler outlet, must remain untightened in order to achieve
continuous draining during filling-up. Drain all high points
of heating system and close the various draining screws
one after the other as soon as water reaches their level.
After filling the boiler for the first time, flush completely
(using the sludge flushing valve) in order to get rid of
foreign bodies that may come into the components or the
pipes during assembly.
- Water topping up
Subsequent boiler topping-up should be practically non-
existent and in all cases controlled and registered by a
water flow meter. Frequent topping-up is the a symptom
of a leakage which should be repaired as soon as possi-
ble.
1 - 2 Preliminary checks
When commissioning the boiler for the first time in the
season, or after a prolonged shutdown period :
- ensure that filling was done properly and check overall
tightness. If necessary, put more water and drain all high
points until water flows slightly.
- check the connection of the flue stack and the proper
working condition of the draught regulator if any
- check that the high and low vents are not obstructed
- ensure that the doors and the flue access plates are
closed and tight
If necessary, act upon the tightening points.
- ensure that the burner is properly locked
- check if it is properly supplied in fuel, that supply and
return valves are open
- for operation with gaseous fuel types, check that the
safety conditions are fulfilled.
2. O
peration
2 - 1 Principle
Boiler control is done through the thermostats (10) or through
built-in weather-compensated control (optional).
Operation safety is ensured by the limit thermostat (13) with
manual reset.
For boilers fitted with a W.C. control, the boiler water
temperature is adjusted by action on the burner and (or) on
the mixing valve, depending on outside temperature.
Summary of Contents for CHAPPEE NXR4
Page 7: ...7 Réf CI 389 C NOTES ...
