11
FRIWAC-IM-DE-W-UK-10-2021-Rev.0 | Part no. 10084532
EN
ENGLISH
8 Installation and commissioning
!
DANGER
Electricity!
Risk of death from electric shock!
h
Work on live parts must be carried out only by trained
electricians.
h
Disconnect the power supply to the unit before carrying out any
installation, maintenance, cleaning or repair work and secure it
against reconnection.
!
!
WARNING
Hot water!
Severe scalding possible at point of use.
h
Install a thermostatic mixing valve at the point of use.
NOTICE
The domestic fresh water unit may only be
installed and commissioned by specialist personnel who have
been duly trained and authorised by the manufacturer.
!
!
CAUTION
When carrying out repairs and replacing
parts, the prescribed mounting positions and flow directions
for the individual components to be replaced must be
observed.
!
!
CAUTION
Material damage due to water hammer.
Water hammer may occur if the shut-off valves are opened
and closed quickly.
h
Always open and close the shut-off valves slowly and in a
controlled way.
Requirements
• A safety valve to DIN 1988 must be installed at the cold water
input. This may not have a shut-off function.
• Install a filter on the cold water input.
• When operating a circulating system, the applicable technical
regulations and hygiene provisions to DVGW (Deutscher
Verein des Gas- und Wasserfaches - German association for
gas and water) worksheet W551 are to be observed.
• Ensure the various pump units (domestic fresh water unit /
heating circuit unit) are hydraulically separated.
• We recommend flushing equipment is installed upstream and
downstream of the plate heat exchanger in the primary and
secondary circuits for descaling or cleaning if necessary.
• When using galvanised pipework and fittings, observe the
installation sequence to avoid electrochemical corrosion.
• The fittings are preassembled at the factory; however, the
tightness of the seal is to be checked before commissioning
(pressure test).
NOTICE
Install the domestic fresh water unit
with the controller at eye level whenever possible.
8.1 Installation
Tightening torques for screw fittings 1" 55 Nm
!
!
CAUTION
Danger of material damage.
The domestic fresh water unit is not protected against water
splashes or drops.
h
Always install the domestic fresh water unit in a dry environment.
!
!
CAUTION
Poor water quality!
Hard water causes limescale build-up in the domestic fresh
water unit and reduces the water quality.
h
We recommend the use of a water softener for water hardnesses
> 8.5° dH and water temperatures < 60 °C.
h
A water softener is required for water hardnesses > 14° dH and
water temperatures > 60 °C.
1. Remove the domestic fresh water unit front cover.
Fig. 8-1: Removing the front cover
• Observe Fig. 8-2 for steps 2 and 3.
2. Mark the drilling points for mounting the domestic fresh
water unit.
3. Drill holes for the relevant size screws and wall plugs.
420
85
60
85
353
72
102
165
165
375
355
103
150
G 1"
G 1"
Fig. 8-2: FRIWAC installation diagram
