Nibe VVM 225 Installer Manual

Preparations
1.
Check that the switch (SF1) is in position " ".
2.
Check that the drain valve between VVM 225 and
the outdoor module is fully closed and that the
temperature limiter (FQ10) has not deployed.
Filling and venting
FILLING THE HOT WATER HEATER IN
VVM 225
1.
Open a hot water tap in the house.
2.
Fill the hot water heater through the cold water
connection (XL3).
3.
When the water that comes out of the hot water
tap is no longer mixed with air, the water heater is
full and the hot water tap can be closed.
FILLING THE CLIMATE SYSTEM
1.
Open the vent valve (QM20).
2.
Open the filling valves (QM11) and (QM13), does
not apply to enamel. VVM 225 is filled with water.
3.
When the water exiting the vent valve (QM20) is no
longer mixed with air, close the vent valve. After a
while the pressure starts to rise on the pressure
gauge. When the opening pressure for the safety
valve has been reached, it starts to release water.
Close the filling valve. Vent the water heater coil
using the vent valve (QM22).
4.
Open the safety valve (FL2) until the pressure in
VVM 225 falls to the normal working range (approx.
1 bar) and check that there is no air in the system
by turning the vent valve (QM20).
VENTING THE CLIMATE SYSTEM
1.
Turn off the power supply to VVM 225.
2.
Vent VVM 225 through the vent valves (QM20,
QM22) and other climate systems through their
relevant vent valves.
3.
Keep topping up and venting until all air has been
removed and the pressure is correct.
For an explanation of component designations, see the
component list, section "List of components".
DRAINING THE CLIMATE SYSTEM
Enamel
The hot water is drained by loosening the connection
(XL8).
Set the vent valve for the climate system (QM20) in the
open position for air supply.
Stainless steel
1.
Connect a hose to the lower filler valve for heating
medium (QM11).
2.
Open the valve to drain the climate system.
See also Draining the climate system on page 59.
35Chapter 6 | Commissioning and adjustingNIBE VVM 225
6 Commissioning and adjusting

Nibe VVM 225 Specifications

General

Brand	Nibe
Model	VVM 225
Category	Air Conditioner
Language	English