hp-TECHNIK UHE-A2-PZ, UHE-AX, UHE-A4-M, UHE-A5-GZ, UHE-A3-P Operation, Installation And Maintenance Instructions

Operation Installation and

Maintenance Instructions

Aggregat-Series: UHE

hp-TECHNIK GmbH Industriepumpen-Förderaggregate und Anlagenbau

Gablonzer Straße 21 D-76185 Karlsruhe Germany Tel.: [phone] – 0
Postfach 21 10 10 D-76160 Karlsruhe Germany FAX: [phone] – 28

home: http://[e-mail]

EWB-UHE-e-107.doc 1

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Installation, Maintenance and

Operating Instructions

for hp- internal gear pumps

Series UHE-AX

Please adhere to the following points during installation and prior to initial start-up:

1. The pump will not start up when dry. First fill it with oil.

2. Assure that all pipelines are free of dirt and soil. Suction lines must be bled via the
manometer connection on the delivery side - particularly when long suction lines are being used.

3. Make sure that the pump rotates in the direction designated by the arrow.

4. Shut the solenoid valves before setting or resetting the pump pressure.

5. When installing the pump, make sure that you align the pump shaft and the primary shaft
precisely and that the shafts are not exposed to any radial pressure. Also be sure to use a
clutch that corresponds in terms of size and weight to the pump shaft and that does not convey
any balance error to the pump. To avoid any damage to the clutch, be sure not to hit or bump
the pump shaft, either directly or indirectly, during clutch assembly.

6. There must be 1 to 1.5 mm of clearance space between the two halves of the clutch. Make
sure that the rotating clutch parts do not touch or rub against any of the stationary pump or
motor parts (axially)!

7. Check that all pipe connections and lines have been connected tension-free and are properly sealed
and absolutely tight. We recommend the use of seals made of either copper, aluminium or
synthetics. Under no circumstances may you use hemp, hemp-like materials or any material
similar thereto!

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hp-TECHNIK GmbH Industriepumpen-Förderaggregate und Anlagenbau

Gablonzer Straße 21 D-76185 Karlsruhe Germany Tel.: [phone] - 0
Postfach 21 10 10 D-76160 Karlsruhe Germany FAX: [phone] - 28

home: http://[e-mail]

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8. The letters on the pump stand for:

A = suction connection

S = nozzle connection
R = return/runback (not separately highlighted)

9. Make sure that the return line leads back to the tank. Any blockage in this line will keep the
pump’s pressure control devices from functioning.

10. Clean all pipes/lines of dirt and/or of metal particles before connecting them to the pump.

11. First fill the pump’s suction connection -A- with oil. Then attach the suction line to the

threaded connection -A-.

12. Connect the nozzle line to - S – and the return line to - R -.

13. Remove the cover screw plug for manometer 1. (Please refer to drawing.)

14. Open all shut-off valves along the lines and on the tank. Check whether there is enough oil
in the tank. Make sure that the pump’s and/or the system’s overflow/pressure relief valve is
completely relaxed as described in points 17, 18 and 19.

Initial Operation

15. Make sure that the pump rotates in the direction of the arrow. Connect the E-motor in
accordance with the electrical data on the plate and switch it on. As a precaution and to
protect the motor, be sure to use a protective motor switch equipped with an overload release!

16. Close the opening for manometer 1 with either the cover screw plug or with the manometer
itself as soon as the oil starts running out of the opening. (Please refer to the drawing.)

17. To put the desired operating pressure remove the covering screw first. (Please refer to the
drawing.)

18. Screw a manometer to the connection for manometer 1 and 2 - providing that this step has
not already been carried out.

19. Use a hexagon key to turn the slotted setting/adjusting cheese head screw which was under the
cover screw on the suction side of the pump.

Turn the setting screw to the right (clockwise) to increase the pressure.

Turn the setting screw to the left (counterclockwise) to decrease the pressure.

When setting the desired operating pressure, assure that a setting is chosen which is
within the permissible pressure range of the built-in pressure spring (a pressure stage
between 1 and 4).

Pressure Range

Factory Setting

1: from 1 - 4 bar 2 bar
2: from 2 - 9 bar 6 bar
3: from 6 - 25 bar 15 bar
4: from 15 - 40 bar 15 bar

Attention! Setting a higher operating pressure (one that exceeds the designated pressure

range) will result in the pressure spring blocking and in pressure surges, which,
in turn, will rapidly lead to pump failure.

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hp-TECHNIK GmbH Industriepumpen-Förderaggregate und Anlagenbau

Gablonzer Straße 21 D-76185 Karlsruhe Germany Tel.: [phone] - 0
Postfach 21 10 10 D-76160 Karlsruhe Germany FAX: [phone] - 28

home: http://[e-mail]

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For oil-burning applications, close the burner’s solenoid valve before setting or resetting
pump pressure.

20. After the pressure has been set via the setting/adjusting screw, the electric motor must be switched
off. Subsequently replace the cover screw plus washers over the pressure setting/adjusting screw
and replace the screw plug with sealing at the connection for manometer 1 and 2.

Inspection and Maintenance

21. Pump and motor pump group are maintenance free.

22. Insert a suction filter on the pump’s suction side. Check the system's suction filter regularly for dirt

and to assure that it has not become loose. Use a mesh size of between 80 and 100 microns for
EL-type heating oils.
When using heavy fuel oils and to allow for the high fiber content of such oils, use a mesh
size of 540 microns. However, we do recommend that 100-micron mesh be used during the
first 1 to 2 months (especially when you are using long, welded pipes) until all welding
residues (either in the form of cinder or other particles left over from welding) have been
filtered out. Once this initial period is over, you can switch over to 540-micron mesh.

23. Make sure that the vacuum at the pump’s suction connection (measured at the vacuum

meter connection - refer to drawing) is no greater than -0.4 bar.

24. If the pump is being run with supply/feed pressure, this pressure must not exceed 5 bar.

Trouble Shooting

25. Pump noise can occur when

a) the vacuum on the suction side is too great due to a clogged filter,
b) the suction lines are not properly sealed,
c) the suction line is too narrow or too long.

27. In the interest of efficiency, we recommend that a reserve pump be kept handy near the

burner.

Note:

According to the specifications of DIN EN 12514-1, Paragraph 4.3.3, the user must equip the
overall system with a lower limit restrictor (such as an electric pressure control device).

These installation and maintenance instructions are intended solely for the use of a

specialist!

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hp-TECHNIK GmbH Industriepumpen-Förderaggregate und Anlagenbau

Gablonzer Straße 21 D-76185 Karlsruhe Germany Tel.: [phone] - 0
Postfach 21 10 10 D-76160 Karlsruhe Germany FAX: [phone] - 28

home: http://[e-mail]

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Installation, Maintenance and

Operating Instructions

for hp- internal gear pumps

Series UHE-AX

Measure table

Typ a1 a2 a3 b1 b2 c1 c2 d1 d2 d3
UHE-A2-PZ 5 36 66 85 130 36 50 12 13,5 54
UHE-A3-P 5 36 66 85 130 36 54 12 13,5 54
UHE-A4-M 5 36 66 85 130 36 58 12 13,5 54
UHE-A5-GZ 5 36 66 85 130 36 64 12 13,5 54

Typ e1 f1 f2 f3 f4 f5 f6 S; A; R M1; M2 M3
UHE-A2-PZ 11 35 101 125 58 98 72,5 ½" ¼" ⅛"
UHE-A3-P 11 35 101 125 58 98 72,5 ½" ¼" ⅛"
UHE-A4-M 11 35 101 125 58 98 72,5 ½" ¼" ⅛"
UHE-A5-GZ 11 35 101 125 58 98 72,5 ½" ¼" ⅛"

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hp-TECHNIK GmbH Industriepumpen-Förderaggregate und Anlagenbau

Gablonzer Straße 21 D-76185 Karlsruhe Germany Tel.: [phone] - 0
Postfach 21 10 10 D-76160 Karlsruhe Germany FAX: [phone] - 28

home: http://[e-mail]

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All hp pumps are equipped with axial face
seals made of Viton which can resist pressures
of up to 5 bar and withstand temperatures of
up to 150°C.

The axial face seals are relieved of pressure
on the suction side of the pump.

See graph for maximum pressure load of the
axial face seal, i.e. of the suction side in
dependence with the temperature.

Artikle-No.: 0190015

Accessories

Installation, Maintenance and

Operating Instructions

for hp- internal gear pumps

Series UHE-AX

25

20

15

10

max. Pressure (bar)

5

0

25 50 75 100 125 150

1. Pump housing

2. Union nut

3a. O-Ring

3. Tapet
4a. O-Ring

4. Counter ring

5. Spring

X Installation size*

* - In case of replacement can be found in the

documents accompanying the valid
installation dimension

Article-number: 0190015

Temperature (°C)

hp-electric standby and
companion Heater

All hp Industrial Pumps
Series UHE-AX can be equipped
with electric heating, Series H2, at
the factory.

We strictly recommend using
this option for HFO application.

5/5

hp-TECHNIK GmbH Industriepumpen-Förderaggregate und Anlagenbau

Gablonzer Straße 21 D-76185 Karlsruhe Germany Tel.: [phone] - 0
Postfach 21 10 10 D-76160 Karlsruhe Germany FAX: [phone] - 28

home: http://[e-mail]

|: [e-mail]