STIEBEL ELTRON LWZ 404 SOL - Checks before Commissioning; 6 Commissioning ��������������������������������������������� 26 11.7 Application Range

26 | LWZ304-404 SOL www.stiebel-eltron.com
INSTALLATION
Commissioning
6. Commissioning
!
WARNING Injury
Only qualified contractors may commission this appli-
ance and instruct the user.
!
Material losses
Never operate the ventilation system if there are high lev-
els of dust inside the building or outside in the immediate
vicinity, as this could block the filter. Dust is created by
cutting tiles or working with plasterboard, for example.
 Commission the system in accordance with this manual. Our
customer service can provide commissioning support, which
is chargeable.
Note
If adjustments to the appliance control unit have to be
made during commissioning, observe chapter "Opera-
tion" of the operating instructions and chapter "Settings"
of these installation instructions.
6.1 Checks before commissioning
6.1.1 Heating system
- Are all connections on the central heating and DHW side con-
nected and tightened?
- Was the heating system filled to the correct pressure and
vented, and was the quick-acting air vent valve opened?
- Has the condensate hose been routed correctly?
- Was a vessel placed beneath the safety valve discharge hose?
6.1.2 Ventilation system
- Have the air ducts been installed correctly and sealed if
required?
- Have all air connections been designed correctly?
6.1.3 Heat pump
- Have the insulated air hoses been installed in accordance
with regulations? In particular, the outdoor air and exhaust
air connections must be sealed carefully on both sides.
- Are the exterior wall outlets free from leaves and other
contamination?
Note
Never fit any additional fly screens in the wall outlets.
6.1.4 Cylinders
- Has the cylinder been filled (hot tap open until water flows
out)?
- Has a pressure reducing valve been installed if the water
pressure is above 80% of the permissible pressure?
D0000051625
1
1 Plastic union nut
!
Material losses
The torque of the plastic union nut depends on the gasket
used.
15 Nm = pre-fitted soft rubber gasket.
25 Nm = alternative hard gasket.
Keep to the permissible torque.
- Is the plastic union nut tight against leaks? If it is leaking,
tighten the plastic union nut.
6.1.5 Temperature sensor
- Have outside temperature sensors, cylinder temperature
sensor and, if required, mixer circuit sensor and flow sensor
for the second heating circuit been correctly positioned and
connected?
6.1.6 Power supply
- Has the power supply been designed correctly and the earth
conductor for the cylinder connected?
- Have all internal cables been connected correctly?
6.1.7 High limit safety cut-out
With ambient temperatures of below -10°C it is possible that the
high limit safety cut-out of the electric emergency/booster heater
may trip.
 Check whether the high limit safety cut-out has tripped.
26_04_01_0621
1
1 Reset button for high limit safety cut-out
 Reset the high limit safety cut-out by pressing the reset
button.
6.2 Commissioning
In addition to the factory-fitted programming unit, external pro-
gramming units can also be connected to the appliance.
If more than one programming unit has been connected to the
appliance, assign each one an individual, unique "TERMINAL AD-
DRESS" in the "COMMISSIONING" menu.