For all interlinked or separate battery tank systems with non-return connection.
Tested to DIN EN 12514-1.
Installation, maintenance and usage instructions
Return connection
with non-return valve and
ventilation nozzle
245 mm
220 mm
R
The OILPRESS pressure storage vessels
type 330.902 and type 230.902 are used to
transport heating oil to EL DIN 51603 to one
or more consumer points.
The units consist of a casing with pressure
storage vessel, motor, pump and pressure
switch. During the transport process, the
heating oil is sucked in via the pump and
pressed into pressure storage vessel. The air
cushion in the storage vessel presses the oil
to the individual consumer points.
The motor is switched on by the pressure
switch at a lower working pressure of 1.6 bar,
and switched off again on reaching the upper
working pressure of 2.6 bar.
Pump Type 330.902
The planetary gear pump is driven by the
motor through a reduction gear. The pump is
characterised by its quiet running and low
wear. The pump is protected against conta-
mination by dirt by means of a circular filter
fitted to the pump body.
Pump Type 230.902
The feed pump is a planetary gear pump
driven direct by the motor. The pump is
characterised by its quiet running and low
wear. The pump is protected against conta-
mination by dirt by means of a circular filter
fitted to the pump body.
Casing
The casing is the supporting element of all
components. It houses the pump, motor,
pressure switch, pressure storage vessel,
filter, over-pressure valve and drain valve,
together with the non-return valve and venti-
lation.
Three taper union connections for the con-
nection of 8-mm pipes are fitted to the distri-
butor housing on the underside of the
casing.
Pressure storage vessel
Disconnect the unit from the electrical power
supply before removing the cover hood (see
“Instructions”
). The lower part of the pres-
sure storage vessel is moulded into the
casing. A cylindrical diaphragm is clamped
between the lower and upper part, separa-
ting the air from the oil. An initial air pressure
of 1 bar is applied to the pressure storage
vessel through the valve located in the upper
part of the storage vessel. The air can there-
fore escape over the course of time by
diffusion, increasing the switching frequency
of the pump. This change is corrected by
refilling the air cushion with the aid of an air
pump. When refilling with air, take care to
ensure that the test, over-pressure and drain
valve at the side of the unit are open. The ini-
tial air pressure in the pressure storage ves-
sel is correct when the manometer on the
pressure storage vessel shows 0 bar, and the
manometer on the pressure measurement
device (air pump) shows 1 bar.
Construction and functional
description
Technical data Type 330.902
Motor: 230 V ~ 88 W
Delivery capacity: 22 l/h at 0 bar pressure
Max. consumption:
approx. 10 l/h
Permissible working pressure: 4.0 bar, limited by
over-pressure valve
Upper supply limit: adjustable up to 25 m,
factory set to 15 m
Suction head: 3 m
Pipe connection: Taper union 8x1 mm
Protection type: IP 34
Temperature of supply medium: max. 40°C
Weight: approx. 6 kg
Type 230.902
230 V ~ 50 W
46 l/h at 0 bar pressure
approx. 25 l/h
4.0 bar, limited by
over-pressure valve
adjustable up to 25 m,
factory set to 15 m
3 m
Taper union 8x1 mm
IP 34
max. 40°C
approx. 6 kg
Pressure switch
Control lamp
Suction connection
Filter
Air valve
Pressure storage vessel
initial pressure 1 bar
Pressure connection
Starter button
Test, over-pressure
and drain valve
Pressure Storage
Vessel
Type 330.902 · Type 230.902
Wilhelm Keller
GmbH & Co. KG
Herdweg 1
72147 Nehren
DIN EN 12514-1
