Filling The System With Water - Danfoss Akva Lux II VXi Instructions For Installation And Use Manual

Instructions for installation and use

7. FILLING THE SYSTEM WITH WATER

Test and connections
Before lling the system with water, retighten all the pipe connec-
tions because vibrations and shocks during transport and handling
may have caused leaks. Once the system has been lled with wa-
ter, tighten all the pipe connections once more before performing
pressure test for leaks. After heating of the system, check all the
connections and retighten if necessary.
Please note that the connections feature EPDM rubber gaskets!
Therefore, it is important that you DO NOT OVERTIGHTEN the union
nuts. Over-tightening may result in leaks. Leaks caused by over-
tightening or failure to retighten connections are not covered by
the warranty.
Filling, start-up
Before lling the system with water, retighten all the pipe connec-
tions. Once the system has been lled with water, tighten all the
pipe connections once more before performing pressure test for
leaks. Before lling the system with water and starting-up, check if:
- pipes are connected according to the circuit diagram,
- expansion vessel is connected,
- heat meter is mounted,
- shut-o valves are closed,
- threaded and anged connections are tightened,
- recirculation, if any, has been established.
Filling the heat exchanger / the system with water:
• The pump must be switched o when lling the system with
water.
• Open the ball valves for the HE supply and return ow and
ll the system with water and at the same time venting the
system.
• Fill the heat exchanger / the system with water until the ma-
nometer shows a working pressure, which corresponds to the
system height + approx. 5 m (approx. 1.2 - 1.5 bar).
• Finally open the remaining ball valves and heat up the sy-
stem.
• After lling and heat-up of the system it should be vented by
means of the air vents on the substation, if any and on the
radiators.
• Then switch on the pump.
* Note: There is no lling valve inside the station. For re lling use
a re ll hose, customary for heating systems. Filling of water to
the heating system must be done outside the substation,
typically by connection to a cold water supply in the house-
hold installation.
Accessories available as extra equipment (mounting on site)
KFE tap - code No. 145H3717
For lling and emptying 1/4"
12 | © Danfoss | Produced by Danfoss Redan A/S | 2017.01
Akva Lux II VXi, VXi Solo HWP, VXi Solo H
VI.JV.R1.02