Miele PDR 922 - Operating Conditions; Heater Bank Information

Installation
*INSTALLATION*
71
Operating condi-
tions
Operating pressure Feed water temperature Peak capacity
87 - 145psi / 600 – 1,000kPa
(6 – 10bar)
158 – 203°F (70 – 95°C) 1.32 – 6.6gal/min (0.3 – 1.5m³/
h)
For reasons of efficiency, the operating pressures must not fall below
the specified values.
 The appliances must not be connected to a hot oil circulation
system.
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.
- In order to avoid corrosion, the feed water must be processed. In
particular, when the appliance is not in operation, it must be en-
sured that no air or CO
2
can enter the system.
- The heater bank must be protected from aggressive gases.
- The entire heating system must guarantee that no operating pres-
sure or temperature can arise that is higher than the details given on
the data plate.
- The system must not be connected to the drinking water supply.
- All appropriate regulations, standards, and legislation from responsi-
ble authorities and accident prevention associations for heating and
ventilation systems (in particular for the operation of the heat ex-
changer) must be observed.
 Once the appliance has been connected, re-install all the hous-
ing parts that were removed.