Nibe VVM 310 EMK Installer Manual page 15

BOILER AND RADIATOR VOLUMES
Internal volume in VVM 310 for
calculating expansion vessel is
250 l. The expansion vessel's
volume must be at least 5 % of
the system's total volume.
Example table
Total volume (l) Volume (l) ex-
(indoor module pansion vessel
and climate
system)
500 25
700 35
1,000 50
NOTE
Expansion vessel not supplied with the
product. Equip the product with an expansion
vessel.
The pre-pressure of the pressure expansion vessel must
be dimensioned according to the maximum height (H)
between the vessel and the highest positioned radiator,
see figure. A pre-pressure of 0.5 bar (5 mvp) means a
maximum permitted height difference of 5 m.
If the standard initial pressure in the pressure vessel is
not high enough it can be increased by filling via the
valve in the expansion vessel. The expansion vessel's
standard initial pressure must be entered in the check
list on page 6.
Any change in the initial pressure affects the ability of
the expansion vessel to handle the expansion of the
water.
NIBE VVM 310
SYSTEM DIAGRAM
VVM 310 consists of hot water coil for hot water heat-
ing, immersion heater, circulation pumps, buffer vessel
and control system. VVM 310 connects to the climate
system.
VVM 310 is directly adapted for connection and commu-
nication with a compatible NIBE air/water heat pump,
see page 18, and together they constitute a complete
heating installation.
When it is cold outdoors, the air/water heat pump works
with VVM 310, and if the outdoor air temperature falls
below the heat pump's stop temperature, all heating is
carried out by VVM 310.
-EB15-FL2
-EB15
-CM1
-EB15
-QM40
-EB101
-XL1
-QZ2
-FL10
-XL2
-QM1
Chapter 4 | Pipe connections
-FL1
-RM1 -QM40
15