Draining The Product; Installing The Casing; Available Pump Pressure Head For Heat Pump Circuit - Vaillant VWZ MWT 150 Instrucciones De Instalación E Instrucciones De Uso

START UP
► Open the main tap (A).
5.2

Draining the product

1
1 Heat pump circuit air
bleed valve
► Open the air bleed valve (1) while fi lling the heat pump
circuit.
► Open the air bleed valve (2) while fi lling the heating
circuit with water.
► Close the vent as soon as water fl ows (repeat the
operation several times if necessary).
Caution!
b
Risk of damage in case of bad
purge!
If air purging is not done properly,
this may cause damage to the
appliance.
Make sure the system is properly
►
purged air.
22
2
2 Heating circuit air bleed
valve
5.3

Installing the casing

1
1 Front casing
► Put the front casing back on.
5.4 Available pump pressure head for heat
pump circuit
B
A
A Installation heating
circuit fl ow
A
800
700
600
500
400
300
200
1
100
0 500 1000 1500 2000 2500 3000
A Pressure (mbar)
B Flow rate (l/hour)
1 Position "III"
B Installation heating
circuit fl ow
3
2
2 Position "II"
3 Position "I"
0020166669_04 - 03/15 - Vaillant
B