Nibe EVC 13, Инструкция по установке и обслуживанию

Страница: 16 / 28

Pipe installation 14
EVC 13
H
Min 2,5 m
The volume of the expansion vessel (85) is 12 litres
and it is pressurised as standard to 50 kPa (0,5 bar,
5 mvp). As a result, the maximum height (H) between
the vessel and the highest radiator is 5 metres; see
the figure opposite. If the standard initial pressure in
the pressure vessel is not high enough it can be in-
creased by adding air via the valve in the expansion
vessel. The initial pressure of the expansion vessel
must be stated in the inspection document. Any
change in the initial pressure affects the ability of the
expansion vessel to handle the expansion of the wa-
ter. When the heating installation is equipped with an
open expansion vessel, the distance between the
highest radiator and the expansion vessel must not be
less than 2.5 m.
The max permitted radiator volume is 150 litres at an
initial pressure of 0.5 (bar).
WARNING!
The electrical supply must be
disconnected before draining the
boiler water.
!
Draining the boiler water
The tapping valve is used when you want to drain the
water from the boiler. Unscrew the protective cap and
fit a hose on the tapping pipe, open the valve. Arrange
for an air supply, for example, by opening the safety
valve.
Expansion vessel
Max. radiator volume
HUMM
EL
Patent
Pressure controlled bypass
valve
EVC 13 is equipped with a pressure controlled bypass
valve (48). This is to protect the circulation pump in in-
stallations where the radiator flow can completely
stop. When the radiator side is closed, the boiler water
circulates across the pump internally in EVC 13.