9 Commissioning
Only approved contractors may commission this equipment and
instruct the owner in its use.
Commission the WPF in accordance with these installation
instructions and the operating and installation instructions of the
heat pump manager WPM II. Our customer service can assist in
the commissioning, which is chargeable.
Where this heat pump is used in an installation that is intended
for commercial use, the rules of the relevant Health & Safety at
Work Act may come into play. For further details, check your local
authorising body. The function of the device, including those of
any safety equipment fitted is tested at the factory.
After commissioning, the installer should complete the
commissioning report contained in these instructions.
Check the following prior to commissioning:
Heating system
— Was the heating system filled to the correct pressure, and was
the quick-acting air vent valve opened?
Temperature sensor
— Were the outside temperature and the return temperature sensor
(in conjunction with a buffer cylinder) correctly positioned and
connected?
Power supply
— Was the mains power supply properly connected?
— The rotating field at the heat pump connection (mains) is correct
if, when power is applied to the heat pump connection (mains),
the red diode of the phase monitoring relay illuminates
(see
Fig. A)
.
— The heat pump will not start if the red diode of the phase
monitoring relay does not illuminate.
When everything has been implemented correctly, the system
can be heated to its maximum operating temperature and vented
once again.
!
Risk of damage!
Observe the maximum system temperature in
underfloor heating systems.
9.1 Operation and control
A WPM II heat pump manager is required to operate the heat pump.
It regulates the entire heating system. All necessary adjustments
prior and during operation are made on this device.
Only qualified contractors must make adjustments listed in the
commissioning report of the WPM II heat pump manager.
!
Risk of damage!
The system does not need to be shut down during
summer, as the WPM II implements an automatic
summer/winter changeover. If the system is,
nevertheless, to be shut down, set the WPM II to
standby. That way the safety functions that protect
the system remain enabled (e.g. frost protection).
Drain the water side of the equipment, if the heat pump is taken
out of use at a location subject to a risk of frost or if it is installed
externally.
Drain the liquid contained inside the evaporator via the fill & drain
valve that becomes accessible after removing the r.h. side panel
(pos. 11, Fig. A).
10 Maintenance
!
Risk of damage!
Check the refrigerant circuit of the heat pump annually
for tightness in accordance with EU Directive 842/2006.
Document tightness tests in the service record.
If heat meters are installed, frequently clean their sieves, which
block easily.
When the heat pump operation is impaired (high pressure limiter
responds) through deposits of corrosion by-products (rust sludge)
inside the condenser, only dissolving them by means of solvents
used by our customer service will remove this problem.
!
Risk of damage!
Never change the factory setting of the rotary selector
on the overcurrent circuit breaker.
Factory setting
WPF 52 35 A
WPF 66 45 A
A permanently set overcurrent circuit breaker is installed inside the
compressor of the WPF 20, 27 and 40.
16 | WPF 20/27/40/52/66 www.stiebel-eltron.com
INSTALLATION
COMMISSIONING
| MAINTENANCE
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