Miele PDR 922 - Steam;Hot Water System Requirements

Installation
*INSTALLATION*
70
 The appliances must not be connected to a hot oil circulation
system.
Fitting information
for steam and con-
densate hoses
- Ensure that the hoses are not twisted or compressed.
- Do not use steam and condensate hoses to compensate for gas
lines.
Heater bank infor-
mation
To avoid damage to the heater bank the following must be observed
during commissioning:
- In order to avoid unnecessary heat variations, ensure that heating is
even (do not allow sudden bursts of steam).
- In order to avoid corrosion, the feed water must be processed. In
particular, when the appliance is not in operation, it is important to
ensure that no air or CO
2
can enter the system. The condensate
separator must be installed such that when the system is not oper-
ating, the heater bank is completely emptied. This means that no
condensate may remain in the heater bank. The installation of an in-
verted bucket condensate trap is recommended.
- The heater bank must be protected from aggressive gases.
- The entire heating system must not operate at a higher pressure or
temperature than specified on the data plate.
- All appropriate regulations, standards, and legislation from responsi-
ble authorities related to the installation and operation of heating
and ventilation systems (in particular for the operation of the heat
exchanger) must be observed.
Steam valve for
high-pressure
steam – indirect
Requirements profile:
- Pneumatic or servo-controlled
- Connection to ½" coupling
- Flow coefficient of at least 3m³/h for water
- Media temperature at least 365°F (185°C)
- Operating voltage 230V / 50 – 60Hz
- Closed when de-energized
- Electrical connection for 1/4"(6 – 7mm) cable diameter
 Once the appliance has been connected, re-install all the hous-
ing parts that were removed.
Hot water
 The hot water connection may only be carried out by an autho-
rized or trained/certified technician.
In addition to these installation instructions, the information from
the data plate, wiring diagram, and documentation accompanying
the appliance must also be noted and complied with when connect-
ing hot water-heated Miele appliances.