Connecting The Hydraulic Unit To The Heating Circuit; Flushing The Installation; Hydraulic Connections - Fujitsu Waterstage WOYG160LJL Installation Manual

 Hydraulic connections
►

Connecting the hydraulic unit to the heating circuit

▼ Flushing the installation

Before connecting the hydraulic unit to the installation,
rinse out the heating system correctly to eliminate
any particles that may affect the appliance's correct
operation.
Do not use solvents or aromatic hydrocarbons (petrol,
paraffin, etc.).
In the case of an old installation, provide a sufficiently
large decanting pot with a drain on the return from the
boiler and at the lowest point in the system in order to
collect and remove any impurities.
Add an alkaline product and a dispersant to the water.
Flush the installation several times before proceeding
to the final filling.
▼ Connections
The heating circulation pump is built into the hydraulic
unit.
Connect the central heating pipes to the hydraulic unit
correctly according to the direction of circulation.
The pipe between the hydraulic unit and the heat
collector must be at least one inch in diameter
(26x34 mm).
Calculate the diameter of the pipes based on flow rates
and lengths of the hydraulic systems.
Tightening torque: 15 to 35 Nm.
Use union connectors to make it easier to remove the
hydraulic unit.
Try to use connection hoses to avoid transmitting noise
and vibrations to the building.
Connect the drains from the drain valve and the safety
valve to the main sewer system.
Verify that the expansion system is correctly connected.
Check the expansion vessel pressure (pre-inflated to 1
bar) and the safety valve is calibrated.
The flow rate of the installation must be at least equal
to the minimum value mentioned in the specifications
table "General characteristics",
The installation of a regulator (other than those included
in our configurations) which reduces or stops the flow
through the hydraulic unit is prohibited.
- 30 -
page 7.
Waterstage / Installation / 2011 - EN