Address:
Volta GmbH & Co. KG
Telefon:
Internet:
Salzstraße 17
(08385) 921 393-0
www.volta-gmbh.de
Ortsteil Wohmbrechts
Telefax:
e-Mail:
D-88145 Hergatz
(08385) 921 393-20
OPERATING INSTRUCTIONS
1. Operating Instructions for Air Heating Batteries
a, Technical Prerequisites for Putting into Operation
Prior to connecting the heating batteries it must be checkes if the voltage indicated on the name plate
agrees with the existing supply voltage.The heating batteries are connected together into one or more
groups for switching purposes, and for three-phase supplies each switching group has three terminals,
and for DC or AC supplies each switching group has two terminals and a terminal for earthing purposes
for each switching group in addition. The parts of the housing or flange plates are made of metal and must
also be earthed.
It is a general requirement that the electrical connection may be made by certified personnel only. The
applicable regulations as per DIN 57100, part 420/VDE 0100, must also be complied with. The
temperature safety limiter, temperature monitor, flow monitor and so forth must be controlled accordingly.
b, Putting into Operation
In the case of the embodiment with
cold air inlet
in line with types ERR/91 and ERRG/91 the heating
element cables and the connecting bars are provided inside the duct. The air flowing through the heater
cools the cable connections continuously thus reducing the heat in the IP 54 connection box. Therefore
standard cables may be used.
In the case of very high final air temperatures or very unfavourable conditions (e.g. reduced air quantity or
recirculated air operation depending on the method used) there may be temperatures existing in the
connection box which are no longer suited to use standard, rubber-insulated cables (this decision can be
taken by the customer only). In this case use high temperature resisting cables, e.g. silicone, teflone or
fiberglass insulated cables.
Depending on the distance between the control box and the air heating battery it is recommended to
mount separate connecting blocks in a short distance to the air heating battery with the aim to save
running metres of heat resisting cables.
The correct manufacture of the current supply connections and both earthings (electrical connection and
housing) must be checked prior to the test run.
On the occasion of a test run all parameters, e.g. air quantity, final air temperature and so forth (Technical
Data Sheet refers), must be completely complied with. In unfavourable cases partial considerations of or
deviations from the values prescribed by the manufacturer (Technical Data Sheet refers) may cause
damage to or destruction of the air heating battery.
c, Normal Shut-Down Procedure
The shut-down procedure for fan and air heating battery shall be as such that the fan is still in operation
for another five minutes to avoid overheating. For this reason the fan motor after-running is ensured with
the help of a time-limit relay.
Also, existing thermostats must be set on site in accordance with the requirements requested for. For
example, a temperature safety limiter is adjusted between 50°C and 60°C with a final air temperature of
40°C; this applies also to other final air temperatures.
d, Safety Shut-Down in the Case of Power Failure
Depending on the operation conditions and in the case of voltage failure the surface of the heating
rods can be heated up by 50°C to 70°C. It can hardly be expected that the air heating battery will be
damaged. At worst, it may be necessary to replace a filter or a plastic cover.
Electric air heater
Air handling unit X-CUBE
96
