Oilpress Keller 286.932 User manual

Solar
maintenance
pump
General information
The KELLER solar maintenance pump is an electro-
magnetically-driven vibrating piston pump. The
pump is characterised by its safe and reliable operation,
low running noise and ease of operation.
The pump has been specially optimised for the main-
tenance and refilling of thermal solar power systems.
The pump system can easily be replaced. The
performance range at a viscosity of 6 mm2/s (water)
can be taken from the diagram.
The pump can be operated intermittently or
permanently (i.e. several hours at 100 % ED). Dry
running must be avoided. The solar maintenance
pump is equipped with an integral thermo-element,
which protects the pump against overheating and
permanent damage. The thermo-element switches
the solar maintenance pump off on reaching a
temperature critical for the pump, and on again
automatically following cooling. The cooling time can
be up to 45 minutes or longer, depending on the
ambient temperature. Note that after automatic
switching off by the thermo-element, the pressure
side is shut off, in order to prevent uncontrolled
pumping. The thermo-element must not be used as
an automatic shut-off switch, since this will eventually
result in damage to the switch. After every period of
use, or after extended pauses, the pump must be
switched off using the switch on the pump.
Dirt particles and mineral contents of fluids will impair
the function of the pump. The installed filter must not
be removed.
The components coming into contact with the
medium are made of stainless steel or plastic. The
processing guidelines of the products used, and the
applicable legal and official regulations, must be
observed at all times.
Operating instructions
art. 286.932

Cleaning the pump
The working life of the pump depends on the quality
and purity of the transport medium. If the perfor-
mance of the pump is reduced due to contamination
of the pump system, or the pistons jam on the guide
tube following longer periods of disuse, the pump
can easily be cleaned.
To clean the pump, proceed as follows:
1. Unscrew the container connection piece (12) and
the container screw closure (13).
2. Remove the hose clamp and disconnect the suction
hose from the pump.
3. Remove the retaining screw (11) on the suction
connection (10) using an SW 11 spanner.
4. Turn the suction connection (10) to the right, and
simultaneously withdraw downwards. The guide
tube (6) will be removed together with the suction
connection (10).
Technical data
Power supply 230 V, ~ 50 Hz, 50 VA
Protection type IP 64
Cable length 3 m
Weight approx. 2.3 kg
Pump dimensions Ø 56 mm, height 220 mm
Connections Pressure side 6 mm or 1/2”
Suction hose 6 mm
Canister connection 0.5 m + filter
Pump performance No. (DIN) 61
see diagram
(medium water)
6
4
2
020 40 60 80 100 120 I/h
Ø 8,0
bar
5. The piston (3) and the two piston springs (2 + 4) are
located on the guide tube (6). The piston (3) must
be able to move freely on the guide tube (6). Clean
the assembly by sliding the piston (3) to and from
on the guide tube (6) and clean using a cleaning
fluid compatible with the transport medium. If
compressed air is available, this can also be used
to clean the parts.
6. Flush out and blow out the valve in the piston (3).
The suction valve components (7 + 8) can be dis-
mantled and cleaned by unscrewing and removing
the suction connection (10) from the guide tube (6).
7. When reassembling the pump, take care to ensure
the correct installation sequence of the parts (see
assembly diagram). The long spring (4) must be
installed between the piston (3) and guide tube (6),
and the short spring (2) on the piston itself (3).
8. In the event of wear to the piston (3) or guide tube
(6) it is advisable to replace the complete pump
system.
Any further repair and maintenance work must be
carried out only by a specialist.
13 12
234 6 7
8
10 11
14

Instructions on initial commissioning:.
nThe loud noise heard on initial commissioning or
when changing the canister will only continue until
the pump system has been filled with fluid.
nEnsure that there is sufficient fluid in the container,
and that the suction hose with filter is immersed in
the fluid. If necessary, adjust the length of the
suction hose to suit the container.
nIf the pump fails to start on initial commissioning,
proceed as described under “Cleaning the pump”.
nThe bleed unit supplied (1) must be connected to
the pump (2) on the pressure side using the 2 m long
1/2” PVC fabric hose (3) with the aid of the hose
clamps. The short length of 1/2” PVC fabric hose
(4) must be connected to the flushing/filling
connection (5). After every maintenance, and whenever
reconnecting the solar maintenance pump to
the solar power system, the bleed unit must be
opened until no further bubbles are seen to escape
from the bleed unit. This will prevent any additional
air in the pressure hose of the solar maintenance
pump being transported into the solar
power system. The bleed unit (1) must then be
closed again and the shut-off valve of the solar
power system can now be opened for filling.
1
3
2
4
5
Connection of return hose
If the solar maintenance pump is to be operated with
a return hose between the solar power system and
the solar maintenance pump, the return hose
connection (14) must be fitted in accordance with
the enclosed operating instructions, and connected
by means of a 1/2” PVC fabric hose.

WILHELM KELLER GmbH & Co. KG
Herdweg 1 · D-72147 Nehren · Telefon: [phone] · Fax:[phone]
E-Mail: [email protected] · www.oilpress-keller.de 913.822/06/07
Safety instructions:
nThe pump must be connected only to an AC
power supply with the same voltage as shown on
the rating plate of the pump
nElectrical equipment is not a child’s toy. The pump
must therefore be kept out of the reach of children
at all times.
nDo not leave the pump unsupervised while connected
to the power supply
nDisconnect the pump from the power supply before
filling or draining the canister: do not remove
the plug from the socket by pulling on the cable.
nThe pump is designed to protection type IP 64,
and is protected against spray water. The pump
must not however be immersed in water or other
fluids.
nBefore removing the pressure hose, always
disconnect the pump from the power supply and
relieve the pressure in the system by briefly
opening the bleed unit.
nPlease note that the pump will become warm
during long-term or permanent operation
nAlways note the processing instructions prescribed
by the manufacturer of the products being transported.
nEnsure that the applicable legal and official
accident prevention regulations are observed at all
times.