Alto PZC Classic Manual

25.10.2004 – 0617551 UK Vers. 1.1
Directions for Use
for Automatic Pump Station
PZC Classic

21.10.2004
ALTO Danmark A/S

21.10.2004
ALTO Danmark A/S
Contents Page
1 Preface 1
2 Connections to low-pressure plant 1
2.1 Directions for mounting 1
2.2 Water connection 1
2.3 Compressed-air connection 2
2.4 Connection of detergents 3
2.5 Layout drawing for pump station PZC 4
3 Directions before operation - Automatic cleaning 8
4. Security devices 10
5. Regular service and control 11
6. Interruption of operation and remedy 12
7. Flow diagram 15
8. Type plate 16
9. Technical data 17
10. Guarantee 18
11. Material and spare parts list 19
Dato:
Godkendt:
E.&.O.E

21.10.2004
ALTO Danmark A/S

21.10.2004
ALTO Danmark A/S
1. Preface
ALTO Danmark A/S congratulates you with your low-pressure foam cleaning system
which full fills the latest technical hygiene requirements.
Prior to installation and start of operation please make sure that your operational staff
reads the directions for use. On operation as laid down in the directions for use you will
achieve optimum cleaning and hygiene in your factory and minimum requirement for
maintenance and repair work.
The combination of a centrifugal pump and an injector offers the possibilities of automatic
and manual:
a) -foam spreading of detergents
b) -rinsing off with water
2. Connections to the Low-pressure Plant
2.1 Mounting of the Plant
The plant should only be mounted in frost-free rooms.
2.2 Water Connection
a) Prior to connection to the plant the supply pipe should be rinsed through
carefully in order to remove coarse impurities and metal shavings.
b) The water connections for pump station PZC (hot or cold water) are at the top of
the plant (A on the layout drawing on page 4).

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c) It is important to ensure abundant water - no less than 150 l/min. per
pumping unit. To meet this requirement the diameter of the supply pipe should
be minimum 1 1/4" (32 mm) at a water pressure of 3,5 bar, and at a water
pressure lower than 3,5 bar the water pipe should be minimum 1 1/2" (38 mm).
d) The plant is equipped with a filter on the supply pipe of the pump.
e) The pressure loss in the supply pipe should be kept as low as possible which
means that:
- unnecessarily long supply pipes should be avoided
- low resistant ball valves should be used
- fittings with high pressure loss should be avoided
f) On pipe mounting care should be taken that no air locks are produced.
g) Max. allowed temperature of inlet water: 70°C
h) Max. allowed pressure of inlet water for pump station PZC: 4 bar
2.3 Compressed-air Connection
a) Prior to connection to the plant the supply pipe should be rinsed through
carefully with air in order to remove coarse impurities and metal shavings.
b) The plant should be connected to a compressed-air pipe or a compressor
offering:
- an inlet pressure to the low-pressure plant of minimum 5 bar
- a minimum capacity of 450 l/min.

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ALTO Danmark A/S
d) The compressed-air pipe should be connected direct to the plant by a union to
facilitate dismounting. All plants are equipped with a closing valve with 1/2" thread
(compressed-air connection for pump station PZC) (O on the layout drawing on
page 4).
2.4 Connection of Detergents
a) place the can with the suitable detergent in the can holder.
b) Control the detergent hose filter for impurities.
c) After pre-rinsing the hose should be placed in the detergent so that the filter is
lowered sufficiently below the surface to avoid suction of air during foam
spreading or disinfection.

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ALTO Danmark A/S
2.5 Layout Drawing
A. Inlet pipe I. Filter/press. gauge/reduction valve, air
B. Ball valve for water J. Solenoid valve for air
C. Strainer K. Dosing valve for detergent
D. Flow switch L. Filter/reduction valve for external air
E. Pump M. Foam outlet
F. External air N. El. box
G. Water outlet O. Air supply
H. Pressure gauge for water

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ALTO Danmark A/S
3. Directions Before Operation
Automatic Cleaning
a) Set a scale value of approx. "4" on the dosing valve for detergents (K on the
layout drawing on page 4). The value of the scale has got nothing to do with % of
detergent sucked up during operation. Final adjustment of the valve should take
place during operation dependent on type of detergent.
b) Start the automatic plant from the control unit by means of the entered program.
c) Set the air pressure at 5 bar on the reducing valve for air (I on the layout drawing
on page 4). Check the air pressure on the pressure gauge for air (I on the layout
drawing on page 4).
NOTE! When setting the reducing valve for air carefully pull up the knob and turn it right
for higher pressure and left for less pressure.
d) The foam quality is correct when the foam is a little moist and small bubbles are
created. Being to wet the foam will slide off quickly. That will cause insufficient
action time and bad utilisation of the detergent.
e) Insufficient foam quality is caused by
- too low concentration of the detergent
- too high temperature of the inlet water
- insufficient air quantity and/or pressure
- detergent not suitable

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4. Security Devices
a) Closing valve for water (B on layout drawing page 4).
On the inlet pipe there is a closing valve in the cabinet by which the water supply
to the pump can be closed.
b) Strainer (C on layout drawing page 4).
On the inlet pipe of the pump a strainer is mounted to prevent impurities from the
water and the pipe work to get into the flow switch, the pump and the injector.
c) Flow switch (D on layout drawing page 4).
For control of the pump a flow switch has been mounted on the inlet pipe. The
flow switch activates the pump as soon as a flow takes place in the flow switch. If
all valves are closed and there is no flow in the flow switch, the flow switch
disconnects the pump after the time interval entered into the control. On the outlet
pipe a non-return valve is mounted to prevent a reflux through the pump and flow
switch into the water inlet.
d) Closing valve for air (O on the layout drawing on page 4)
A manual closing valve for air is mounted on the air inlet for closing the air supply.
e) Solenoid valve for air (J on the layout drawing on page 4)
The air supply for the injector in the automatic part is opened by solenoid valve.
f) Pressure gauge for water (H on layout drawing page 4).
g) Pressure gauge, filter and reduction valve for air (I on layout on page 4).