Granudos 10-S4 User manual

WDT Operating instructions GRANUDOS 10 (S41C-03/10) page 1 of 21
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Series No.....................................Customer.....................................Date of delivery...................
Operating instructions GRANUDOS 10-S4
Safety Devices
1. Chlorine and acid may not be mixed together or
with other chemicals
Pay attention to the safety devices on chemical
Containers
2. Close hopper immediately after filling
3. If an adapter to a chemical container is used the
hopper must be screwed even and firmly to the
container
4. Clean environment with water if chemical was
spread
5. Only instructed personnel may work with the
GRANUDOS
6. Ensure booster pump does not run dry, always
isolate pump when backwashing.

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TABLE OF CONTENTS
page
1 Function of GRANUDOS 10-S4 2
1.1 Data, Measures, Performance 3
1.2 Dosing Assembly Chlorine 4
1.3 Dissolving System 5
1.4 Acid dosing 6
1.5 Control System GR-S41 7
1.5.1 Service elements 7
1.5.2 Operation and test programmes 7
1.5.3 Dosing performance –Dosing scheme 8
1.5.4 Diagnose 9
1.5.5 Irritations not indicated by monitoring switches 11
1.6 Filter disinfection at back wash –high chlorination 12
2 Installation 12
2.1 Tubing 12
2.2 Electrical Connection 13
3 Start 13
3.1 Check of pump 13
3.2 Deaeration of water supply tubing 13
3.3 Water level in flushing tank 13
3.4 Water flow/Suction performance of injector 13
3.5 Filling of Chlorine into the hopper 14
3.6 Providing of acid 14
3.7 Dosing Performance Adjustment 14
3.8 Dosing controlled by Auto-Controller 15
4 Maintenance 15
5 Control plate GRANUDOS-S4c 16
6 Maintenance List GRANUDOS 10/45/100 17
7 Spare parts list GRANUDOS 10-S4 18
8 Wiring diagram 19

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1 Function of GRANUDOS 10-S4
1.1 Data, Measures, Performance
The GRANUDOS 10-S4 dosing system comprises:
-polyethylene housing one piece
-filling hopper 5 kg (option 10 kg or adapter to 10 kg containers)
-calcium hypochlorite screw feed arrangement
-peristaltic acid pump
-dissolving system
Measures:
base: 60 x 50 cm
height: 80 cm
weight: 30 kg
Material:
PE, polyethylene
Booster Pump
centrifugal pump: SS - 0.3 kW, 230 Volt
supply pressure: 0,2 –1,2 bar
counter pressure: 0 –1,2 bar (depending on supply pressure)
water flow: app. 1000 l/h
Dosing performance ( further see para 1.5.3)
Chlorine dosing motor PLG 30-35 app. 2,4 * ( 0,44**) kg/h
acid: 1,3 * ( 0,15**) l/h
* cycle time 1 minute
** cycle time 6 minutes
Fault remote indication by relay
1 supply carboy lance
2 dosing pump for acid
3 strainer GR 10 complete
4 control system
5 dosing hopper
6 dosing assembly GR 10
7 pressure switch
8 floating valve d25 complete
9 booster pump
10 suction tube with flow switch
11 acid dosing valve GR
12 mixing cyclone GR 20
13 venturi complete
14 level switch GR 20

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1.2 Dosing Assembly
The dosing assembly, placed into the main housing consists of the dosing hopper (5a) and the dosing unit
with dosing motor (6a) pushed into and screwed to the motor holder (6b) the dosing
screw (6c) and the dosing nozzle which is heated preventing condensation of the warm pool water vapour.
The dosing unit is screwed into the dosing hopper. The required dosing rate is adjusted at the control board
by means of a dosing cycle and dosing time –see para 1.5.
5a dosing
hopper
5b hopper
cover
6a dosing
motor
6b motor
holder
6c dosing
screw
6d heated
dosing nozzle
6e knocker
The knocker (6e) gives a stroke to the dosing hopper
wall and thus prevents clogging of the chemical.
The complete dosing assembly can be taken out of the
frame for service.
With the shown fitting systems chemical containers of 10 kg can be fitted directly to the hopper so that the
chemical must not be moved from the container to the hopper.
Fitting system to join a Fitting system to join a
10 kg container with round edge 10 kg HTH container

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1.3 Dissolving System
The dissolving water is normally supplied from before or from behind the filter. There must be a sufficient
supply pressure to avoid dry running and/or cavitation on the booster pump, at least 0.2 bar. The
pump pressure is controlled by the pressure switch (7) fitted on top of the pump. At a pressure below the set
switch pressure by sucking air or at pressure drops the machine stopps, lamp 1 & 2 will burn. At works 1,5
bar is set.
The supply water is divided at the discharge of the booster pump (9), one way leading to the
flushing tank via the floating valve (8), the other branch directed to the venturi nozzle (13), where
the flushing water is sucked together with the dosed chemicals out of the flushing tank. A flow
switch (10), being installed in the suction tube of the venturi monitors the suction power of the
venturi. To adjust the suction to different pressure conditions an orifice washer (13c) with different
bores can be used. To mix the chemicals and to ensure the complete dissolving of the hypochlorite
granules a cyclone mixing chamber (12) is fitted after the venturi.
To ensure that calcium hypochlorite and acid do not come into contact with each other in the open
part of the dissolving assembly a sophisticated control system is installed:
- metering of the two chemicals is regulated with pauses between the metering intervals
-dosing motors of chlorine and acid are controlled by connected relays –joint dosing is
impossible
-flow switch (10 indicates if water flow to venturi falls below 150 –200 l/h
-level switch (14) indicates water maximum or water minimum level in the flushing tank thus
supervising water supply conditions.
-4 red lamps indicate any fault.
If any non-compliance with the given limits occurs, the chemical dosing will be stopped.
7 pressure switch 13 venturi nozzle
8 floating valve 14 orifice washer inside
9 booster pump Lo HM04 flux 15 level switch low/high
10 flow switch holder d40 with flow switch 16 lid on flushing tank
11 acid dosing valve with chlorine dust protection
12 mixing and dissolving 17 overflow to drain
chamber with PVC ball valve 18 dust prevention tube
7
8
9
10
11
12
14
13
15
16
17
18

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The flushing tank is an open system with two ways for a drain of water coming from the
circulation to the flushing tank and possibly causing an overflow at switch off times. To avoid this,
the flow switch holder as the floating valve are acting as non return valves: The floating valve
closes the inlet bore at rising level (proved up to 4 bars at test), in addition a spring loaded non
return valve is installed in the elbow fitting into the valve. The switch bobbin has a seal to close
this way. Both devices function well if the seal/diaphragm are maintained in a good shape. But as a
mechanical seal may leak after any time or by being blocked by
impurities a 100% isolation may not be guaranteed. If this is needed
for any cases, an electric valve must be installed.
1.4 Acid dosing
The acid required either for pH-control or just for cleaning of
the flushing, mixing and dosing system is metered by the
peristaltic pump to the flushing water via the dosing injector
(11). As the cleaning procedure is vital for the correct function
of the complete dosing assembly, chlorine dosing is stopped if
the level switch at the supply carboy lance indicates container
empty.
As acid use one on base of sulphuric acid (37 –50 %),please do
not use concentrated hydrochloric acid for this job as that
penetrates the peristaltic hose and will destroy the pump head.
Diluted hydrochloric acid may be not strong enough for the
neutralisation job. Please note that using dry acid (sodium
bisulphate) 20% (= maximum concentration) is equivalent to a only
10% sulphuric acid.
Maximum dosing performance is app. 3 l/h and is set as for
chlorine. The dosing cycle set for chlorine is valid for acid too.
1.5 Control system S41
1.5.1 The service elements
The processor-plate S4 of the GRANUDOS is
combined with the front facsia to a unit with the
elements
-main switch on/off
-main fuse 3,15 AT
-1 programme switch for test- and operation
programmes
-2 knobs to adjust dosing performances 0-
100%
-1 green lamp to show „on operation“
-4 red lamps for fault and dosing indication
Internal elements: fuses, program switch for
alternatives in
cycles and timers
3,15 A
on / off
Diagnose
level low
pump
pressure
off
on
off
level high
suction
dos off
acid
empty
dosing dosing
chlorine
low
Programme
Acid
Chlorine
auto
monitor.
test
chlorine
dos-off
test
knocker
off
auto
test
acid
hand
60
100
20
30 70
80
100
90
40 50
%
60
100
20
30 70
80
100
90
40 50
%
GRANUDOS
S4

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1.5.2 Operation and test programmes
By turning the programme switch there is a retention time of
2 seconds with 2 flashes of the green lamp
Auto:
Dosing control by external auto-controller free chlorine and pH-value. Dosing always within the
dosing cycle advance or at the next cycle. The cycle is to be set on 1 minute with code switch S1 on
“on”, or on 6 minutes with code switch S2 on “off”. Dosing of chlorine and acid is independent.
Auto monitor.: as „Auto“ but with dynamic time monitoring: :
When controlling the GRANUDOS dosing by an external controller the dosing performance must
be set high enough to ensure the dosing times (= dosing performance) of acid and chlorine shall not
exceed 50% of total time, the actual values are near to the set points of free chlorine and pH. If
controller output time exceeds 50% , there must be any interruption in the system:
-too high bathing load
-interruption at the dosing appliance: motor, valve
-interruption at the auto control system: hanging relay, faulty electrode etc.
The GRANUDOS controller S4 adds up all ordered dosing time (input time) that exceeds
50% of total time and stops dosing if 60 minutes excess time is reached. Indication by
flashing of all 4 red lamps.
Hand
Continuous dosing as set. dosing cycle as set on code switch S2 ”on”1 minute, “off” 6 minutes..
With the longer cycle time you get a lower dosing performance
Test chlorine:
Test chlorine dosing for 6 minutes continuously, then stop, the green lamp flashes
Can be used to test the real dosing performance.
Test acid :
Test acid dosing for 6 minutes continuously, then stop, the green lamp flashes.
Can be used to test the real dosing performance
Test knocker
Test for knocker function: the knocker hits 4 times all 2 seconds then stop, the green lamp flashes
Dos-off
Dosing switched off, the booster pump continues. Used for maintenance.
Off:
Switch off of all functions. Used if the machine is taken out of operation for a longer period.
Dosing can be switched off by an additional external switch e.g. a flow or pressure switch
Programme
Acid Chlorine
auto
monitor.
test
chlorine
dos-off
test
knocker
off
auto
test
acid
hand
60
10 0
20
30 70
80
100
90
40 50
%
60
10 0
20
30 70
80
100
90
40 50
%

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in the measuring water tubing or in the circulation to prevent dosing if there is an
interruption.
1.5.3 Dosing performance / Dosing scheme
The metering of the two chemicals is regulated in cycles with pauses between the metering
intervals. The dosing performances are defined by setting dosing cycles ( time between the
intervals in minutes) and dosing times (durance of running dosing motors 0-100%)
By means of the Code-switches on the control plate (see para 5) the dosing performance can be
adjusted to the principle need of the pool by setting 4 cycle times and combination for dosing times
for chlorine and acid.
Dosing performance for chlorine and acid at continuous dosing –without pause :
Dosing motor PLG 35-30 /dosing screw d19 : app. 4,8 kg/h
Acid pump Sa with dosing hose 3,2x1,6 mm : app. 4,0 l/h
With a set dosing cycle of 1 minute following maximum dosing performances are reached:
Here for dosing motor PLG 35-30–Dosing performance chlorine = chlorine granulate:
Dosing cycle Dosing times Dosing performance
: Chlore - acid at 100% set with knob
Code switch S1 S2 S3 S4 max
1 minute off off 30-20 seconds off off 2,4 kg/h –1,3 l/h
^ 1 minute off off 40-10 seconds on off 3,2 kg/h –0,7 l/h
1 minute off off 20-20 seconds off on 1,6 kg/h –1,3 l/h
1 minute off off 10-10 seconds on on 0,8 kg/h –0,7 l/h
6 minutes on off at standard dosing times 30/20 sec. 0,4 kg/h –0,22 l/h
8 minutes off on at standard dosing times 30/20 sec. 0,3 kg/h –0,16 l/h
12 minutes on on at standard dosing times 30/20 sec. 0,2 kg/h –0,11 l/h
Using the dosing cycles 6 –8 –12 minutes the dosing performance is reduced to 1/6 –1/8 or
1/12 of the dosing performance with dosing cycle 1 minute.
Dosing is running always with the following steps::
-Dosing chlorine as long as set by the performance knob 0-100%,
-5 seconds pause, then following directly
-Dosing acid as long as set by the performance knob 0-100%,
-Pause till end of set cycle time
Example:
Settings by the code switch on control plate:
Cycle 1 minute, chlorine dosing 100% = 20seconds, acid dosing 100% =20 seconds.
Performance set by performance knob: chlorine 30%, acid 10%
Action: Chlorine dosing 30% of 20 seconds = 7 seconds, then 5 seconds pause, then acid dosing
10% of 20 seconds = 2 seconds, then pause 60 –(7+5+2) = 46 seconds etc.
When controlling the GRANUDOS dosing by an external auto-controller the dosing performance
must be set high enough to ensure the dosing times (= dosing performance) of acid and chlorine
shall not exceed 50% of total time. Dosing performance should be set on 3-5 times normal
consumption.
Chlorine and acid dosing are working independent,, it is dosed when the auto-controller
commands for the chemical –but always in the cycle procedure..

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1.5.4 Diagnose
The diagnose field shows the status of the system by 1 green lamp and 4 red lamps.
Starting self check programme
When the machine is switched on a diagnosis programme for the control equipment runs.
1. All lights burn together 2 seconds
2. Every light comes on one after another for one second
If there is no fault, all red lamps go out and the dosing programme commences.
Lamp Indicators for function and irritations
Green lamp –indicates program switch and external inputs
on contiuously: GRANUDOS in operation
no light:Transformer or fuse for control system burnt - no mains supply
fast blink (0,5 second on, 0,5 second off...)
end of test programmes
programme on “dos. off “
programme on “off “
GRANUDOS switched off by the control switch board
Red lamps - indicates faults catched by the switches and of dosing monitoring
All sensors separately monitors and indicate by a red lamp on the facsia. If the red lamp burns the
sensor must catch an irritation. The system stops dosing and pump too, if necessary.
To clear up the situation it must be found out, whether
1. there is really an irritation or
2. the sensor is faulty
Normally the “good status” is obviously to be seen at all switch functions. To check a faulty
switch, he only has to be disconnected at the control plate. As they are “normally open”, irritation
is indicated by a closed switch. By opening the switch connection wires at the plate, the red lamp
must go out and dosing starts again.
Red lamp 1:
burns level high level in the flushing tank is high
Suction low the suction performance of the venturi is too low
dos off dosing is switched off by an external monitoring switch, e.g.
flow switch in the circulation (conn. 7-8 on push conn. S06)
There is coming more water to the tank as is sucked off by the venturi. For the following
Test operations set the programme on “Dos off”.
blinks Fuse F2 burnt (power 24V complete)
Diagnose
level low
pump
pressure
off
on
off
level high
suction
dos off
acid
empty
dosing dosing
chlorine
low

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1. Water level in tank is high but suction power of venturi is OK: switch bobbin of flow
switch in suction tube is at top. By pressing the connecting hose to the suction tube the bobbin
goes down and the switch lamp burns. If loosened again, bobbin goes up and switch lamp goes
out.
In this case there should be a fault in the floating valve: check whether with moving the floater
slowly up and down the incoming water flow decreases or increases steadily. If so adjust water
level by turning the floater rod one turn right. If floating valve does not work steadily, fit a new
valve membrane.
2. Suction power of venturi is not enough: switch bobbin of flow switch in suction tube is at
bottom of tube. By pressing the connecting hose to the suction tube the bobbin does not move,
switch lamp burns.
Possibilities:
- at installation: service pressure too low –counter pressure too high.
tubing faulty or too small:
take out orifice washer (13c) from union behind venturi.
- Particles inside venturi or at outlet nozzle of flushing tank
- Booster pump performance too low –see pressure limits on page 9, para “Installation”.
Fit the by packed pressure gauge to inlet and outlet to check pressure situation.
- Suction tube and/or mixing cyclone are turbid by calcium: acid dosing too low:
if there is still a little suction this can be easily cleaned by pouring hydrochloric acid into suction
cone of the tank. After cleaning increase acid dosing performance.
3. An external monitoring switch e.g. a flow switch in the main tubing to avoid dosing if
anything in the circulation goes wrong. Dosing is switched off.
Red lamp 2:
burns level low level in the flushing tank low
Pump no sufficient water supply
pressure supply pressure too low, air in supply tubing
off pump and dosing switched off –restart only by switching the
programme to “off” and “on” again
Possibilities:
- Suction power too high: fit an orifice washer of 5,5 mm inside union behind venturi.
- Supply water tubing is blocked
- too low supply pressure or air in tubing
- Floating valve cone into flushing tank is blocked by particles, diaphragm is faulty
- supply hole in the floating valve is blocked
blinks Fuse F4 burnt (chlorine dosing motor)
Red lamp 3:
burns acid Acid empty switch active (closed) or faulty
empty leakage of the dosing hose (option)
dos. off dosing acid and chlorine off
flickering: dosing acid dosing pump runs. If not, motor is faulty or breakage on
cable/connection
blinks On programme “auto monitored” the monitoring time is exceeded.
Valid for acid and chlorine independent. See programme
description

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- Too high bather load –increase dosing performance
- Fault in dosing system –see following para
- Fault in auto-controller–see following para
Red lamp 4: chlorine
flickering: dosing chlorine dosing motor should run. If not, motor is faulty or
breakage on cable/connection
blinks On programme “auto monitored” the monitoring time is exceeded.
Valid for chlorine and acid independent. See programme
description
- Too high bather load –increase dosing performance
- Fault in dosing system –see following para
- Fault in auto-controller–see following para
1.5.5 Irritations not indicated by monitoring switches
1. No chlorine dosing: no free chlorine in pool water
No dosing by using the test program chlorine on fascia
-dosing screw blocked
-dosing screw loose
-dosing nozzle (heated) faulty or blocked
-dosing motor faulty
-faulty empty switch: drum empty not indicated
If dosing works by using the test programme there is something wrong on the connection of
auto-controller for free chlorine to the GRANUDOS control plate
-correct output: on continuous dosing the 230 volts should be on the connectors
-faulty wiring –interruption in the cable, on connectors
-faulty electrode
-faulty input relay on control plate –does not switch
2. pH in pool water is high, suction tube/mixing chamber is turbid.
No dosing by using the test programme acid on fascia
If pump roller runs, see whether an air bubble is sucked to pump. If all is OK, increase dosing
rate and choose lower set point for pH. If not, then
-pump roller does not move: motor faulty or interruption on wiring
-dosing hose faulty,
-suction tube not well fitted - loose
-injection nozzle faulty or blocked
-faulty empty switch: container empty switch did not indicate empty
If dosing works by using the test programme there is something wrong on the connection of
auto-controller for pH to the GRANUDOS control plate
-correct output: on continuous dosing the 230 volts should be on the connectors
-faulty wiring –interruption in the cable, on connectors
-faulty electrode
-faulty input relay on control plate –it does not switch
3. Continuous dosing of chlorine or acid on programme “auto” without command from the

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auto-controller: Check whether the output from the auto-controller is correct –there should be
no voltage from there. If so, the 230 volt input relay of the GRANUDOS control plate is
faulty/hanging. Replace the relay or mount a new control plate.
4. Overflow from the flushing tank too much at switch off of GRANUDOS
-switch bobbin of flow switch is blocked on top situation or does not fall down completely
-seal of switch bobbin faulty
-diaphragm of the floating valve is faulty
-piston of floating valve is blocked by impurities: particles from installation or sand if filter
is faulty
-supply pressure of an external booster pump too high
-set in spring-loaded check valve in ell of floating valve. Please make sure that because of
pressure drop you will need a pressure of at least 0,4 bar.
5. Tank is sucked empty though pressure conditions are OK.
-inlet bore of the floating valve is blocked by impurities
- at low counter pressure use washer nozzle with smaller hole behind venturi
Filter disinfektion at back wash –high chlorination
for the durance of the back wash the GRANUDOS must be switched off, as the
flocculation(mains supply off or non volt signal from CCT). If at the end of backwash a
filterdisinfection is wanted the GRANUDOS is switched on and the control inputs (push conn.
S04-7/8) are to be closed. At the same time the dosing tube must be switch over by a 3/2-ways
valve to before the filter. The GRANUDOS meters now with the set dosing performance as
long the control intut is activ chlorine and acid to the back wash water.
Pay attention to the pressure situation at back wash!!
2. Installation
2.1 Piping
For satisfactory water flow through the dissolving system the supply pressure must be at least 0,2
bars. At low service pressure the counter pressure must be low, too. Counter pressure and pressure
loss in the dosing line should be as low as possible. At works the GRANUDOS has been tested at
following pressure conditions without washer nozzle:
Service pressure 1,2 bars Counter pressure 1,2 bars
0,6 bars 0,8 bars
0,3 bars 0,5 bars
Within these ranges the GRANUDOS should function well.
In addition please pay attention to the following:
1. Tapping point for supply water to be before filter or –only if there is enough pressure -
between filter and heat exchanger, dosing point after heat exchanger.
2. Ensure that the tapping/dosing points are free flowing and not blocked by scale or
corrosion. Avoid up and down of tubing
3. Pipe runs to be kept as short as possible. PVC-tubing 25 mm or hose 1´´. For longer
distances or poor pressure conditions use bigger tubing.
4. Use high quality PVC ball valves.

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If the GRANUDOS is not working well, fit the pressure gauge supplied with at inlet and
outlet of the GRANUDOS to measure the real pressure conditions.
2.2 Electrical connection
The electrical supply of the GRANUDOS has to be controlled by the electrical supply of the
circulation pumps that dosing can only be together with water circulation and accordingly water
supply to the GRANUDOS. The GRANUDOS has to be stopped at back washing, too! See wiring
diagram.
To connect external systems to the GRANUDOS please use only flexible cable type. The control
cable for pH and free chlorine (Redox) are pre-fitted into a connector box to be mounted at the
wall.
Electrical works are only to be executed by authorised people.
3. Start up procedure
Please note, that the following procedure must be executed at each new start or
restart. Especially the deaeration of the pump is vital to the function of the
machine.
Switch on the machine only if it is sure that the pump is deaerated and the
isolation valves are opened.

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After having fitted the machine open the ball valves at the tapping points and at GRANUDOS
inlet valve. Press the floater of the floating valve inside the tank down to let water flow into the
flushing tank. When the flushing tank is half full, only then switch on the GRANUDOS mains as
the booster pump of GRANUDOS should not run dry.
To ensure correct dosing the water flow through the flushing tank must run in the correct way as
described below.
3.1 Check of pump
Check by means of a screw driver at back shaft of the pump whether the shaft is turning easily. If
not, the slide ring seal is blocked. Try to loosen it by rapid moving of the shaft right and left. If no
success, the pump must be dismantled completely and the slide ring loosened.
If this is not done, the pump will leak in short time as the O-ring on the shaft will be worn.
3.2 Deaeration of the water supply tubing
At switching on the GRANUDOS take care to deaerate the supply water tubing completely. For
this please observe the water level inside the pre-filter. If he gets empty switch off the
pump/machine and wait till the filter is full again, open the vent screw on top of the filter. T hen
switch on again. On operation the filter must be and stay full of water; a little air at top staying
steadily does not matter. The deaeration procedure can take some minutes depending on the length
of the supply tubing.
Attention! If electric valves are installed to isolate the machine the supply valve must be
opened manually as otherwise the pump can not be deaerated and the pressure switch would
not allow the pump to run.
3.3 Water level in the flushing tank
The water level in the flushing tank should be maintained at half full. To obtain a higher level
unscrew the floater rod, for a lower level screw in the float rod. One turn gives about 1 cm in
height.
3.4 Water flow/Suction performance of the venturi
At stable water level the switch bobbin of the flow switch inside the suction tube should definitely have
risen up to the top, the control lamp of the switch may not burn.
To adjust the water flow to the pressure conditions of the filter system a nozzle is inserted in the union
behind the venturi. If water level in the tank tends to run low or if switch bobbin is at top without pump
running (too high suction at the venturi –high pressure difference between tapping points ) fit the nozzle
with the 5,5 mm diameter hole you find in the spare parts kit. If the water level tends to run high and/or
suction is too low –switch bobbin does not rise (too high counter pressure?) put in the 7 mm washer nozzle
or use without nozzle.
3.5 Adjusting the pressure switch
The pressure switch is fitted pressure side of the booster pump, so monitoring the real pressure. If air is
sucked by the pump or at pressure drops the pump is switched off to avoid:
-overdosing if circulation is disturbed
-the booster pump is not destroyed by cavitation or running dry
The pressure switch is working from 1-3 bar. To adjust the switch to the working conditions take off the
switch cover, turn clockwise the switch knob till the pump switches off, then turn back a little. As the
GRANUDOS is now on fault, the machine must be restarted manually at the front plate by switching the
machine to “off” till the 2 red lamps are off, then to “on” again. Now the GRANUDOS runs again and will
be stopped if the pump pressure falls down to the set pressure.
If additional pumps are switched on or off in filtering service (e.g. pump from balance tank) the switch must
be adjusted without the additional pump. At works the switch is adjusted to 1,5 bar.

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3.6 Filling of chlorine into the hopper
Before carrying out any task involving chemicals the operator should put an personal protective
equipment to provide adequate protection to eyes, respiratory orifices, hands and clothing.
-Open the chlorine hopper lid.
-Fill the chlorine into the hopper carefully to the hopper wall by help of a scoop from the
drum or bucket that no chemical dust will arise.
-Fill in only the consumption of chlorine for app. 2-3 weeks.
-After filling the hopper, put on the cover lid of the chemical drum again.
-Close the hopper lid.
3.7 Acid dosing
The acid dosing pump mounted left side of the housing is delivered with loose dosing hose to
prevent deformation on stock time. Push the hose back into the yellow housing and turn the roller
clockwise some times so that the hose is situated even back in the housing. Then push the safety
disc on the shaft and the pump cover –both in the small bag attached at the pump. Position the acid
container beside the GRANUDOS, open it and put the acid lance into it. Set the “Test acid”
programme . If no fault indicates, the dosing pump must run and acid must now be sucked up
through the transparent suction tube to the pump and further to the injection valve down at the
bottom of the flushing tank.
As acid use one on base of sulphuric acid (37 –50 %). Do not use concentrated hydrochloric acid
as this damages the peristaltic pump.
3.8 Dosing Performance Adjustment continuous dosing –see also para 1.5.3
By means of the code switch on the control plate you can select different dosing performances to meet
the needs of your individual pool. See hereto para 1.6.2 page 8 and para 5 page 17.
The dosing performance is determined by the rpm of the dosing motor, the cycle time and the dosing time
which are to be adjusted roughly by the code switches on the control plate and fine by the performance knob
on the front plate.
Chlorine
In principle the chlorine consumption of a pool depends on a variety of influences:
Loading, temperature, wanted chlorine concentration etc. Normally a standard indoor pool needs
about 300 g of calcium hypochlorite per 100 m3in volume per day. So a pool of 300 m3in volume
would need app. 900 g/day or app. 90 g/h at 10 hours continuous dosing. These 90 g/h would
attention
the hose must not
be twisted
Pump housing
Roller
Safety disc
Dosing hose
Hose holder with tube
conn. 4x1:
suction
pressure

WDT Operating instructions GRANUDOS 10 (S41C-03/10) page 16 of 21
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correspond to only 4 % of the maximum dosing performance of 2,4 kg/h of the GRANUDOS: In
this case we propose to set the dosing cycle to 6 minutes by means of the code switch on the
control plate and get now a percentage of 90/400 = 22% what we set with the performance knob
afterwards at the front plate. By this set dosing rate a certain chlorine concentration in the pool will
result and you have to adjust it now by the performance knob whether you want to have a higher or
a lower one
An outdoor pool needs at good weather conditions about 3-5 times more chemical.
In practice the free chlorine/pH-auto controller does the job. You only have to set a high enough dosing
performance.
Acid
The consumption of acid is harder to predict as that of chlorine. For the beginning set a dosing
performance as same as for chlorine. The actual need has to be found by trial and error. The pH
should be at 7,0 –7,4.
Attention! At new filling of the pool normally the pH is far away from the wanted set
point. So it is recommended to bring the pH at start near to the set point manually by
pouring acid to the pool water –but pay attention that no droplets of acid will meet you –
your clothes.
3.9 Dosing Controlled by Auto-Controller
Using the programme “auto” and connecting an external auto controller for free chlorine and pH
the set dosing cycle is activated. The dosing of the 2 chemicals is running independent from each
other if the control output of the auto controller for free chlorine or pH is active. The dosing rate
set at the GRANUDOS should be at high level or maximum.
It is strongly recommended to connect both, chlorine and pH auto-controller to the GRANUDOS even there
is another dosing system for acid in use. In that case acid dosing of both systems should be connected in
parallel, at the GRANUDOS a small dosing rate should be selected. This is to avoid overdosing of acid in
case of malfunction of chlorine dosing. But please make sure that the acid dosing rate is enough for the
cleaning job.
The auto controller output must be of 230 VAC on/off –or non volt contact pulse length control.
see wiring diagram. The control cable for pH and free chlorine (ORP) are pre-fitted into a
connector box to be mounted at the wall. Never switch off the GRANUDOS during dosing cycle:
first switch off dosing, only then the GRANUDOS.
Please note, that the measuring water never should be taken from behind the filter

WDT Operating instructions GRANUDOS 10 (S41C-03/10) page 17 of 21
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4. Maintenance
It is strongly recommended that a regular maintenance programme is undertaken. Consult your
installer/supplier and take up a service/maintenance agreement. This way the machine will be
maintained in good operating condition.
Minimum checks include the following items, see also the attached maintenance list:
-clean pre-filter if necessary –a scaled filter causes cavitation and consequently damage of
the booster pump
For cleaning take out the complete filter and clean the filter insert outside.
-maintain the machine clean –especially the booster pump
-pay attention to any noise of the pump: cavitation, bearings –if so, contact your supplier
-check monthly for the acid pump whether the springs are o.k. If corrosion can be seen,
change the dosing hose. In any case change it once per year.
-monthly or with each new filling of the dosing hopper check function of all sensors i.e.
water flow, level and empty switches
-every 2 months or with each new filling of the dosing hopper check the dosing screw.
Clean it with a brush if blocked –do not use water.
-change diaphragm of floating valve once per year
-change seal of flow switch bobbin all ½ year
-check once per year acid dosing valve –change seals
A taking out of service
-disconnect acid dosing hose (or use a new one at starting again)
-empty the dosing hopper, take out chlorine dosing screw, clean it thoroughly and store it at
a dry place
-clean all parts of GRANUDOS thoroughly.
-leave the GRANUDOS switched on - programme switch on “0"
clean the environment of the machine thoruoghly.
At taking into operation again
please pay attention to the para 3. Start up procedure

WDT Operating instructions GRANUDOS 10 (S41C-03/10) page 18 of 21
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5. Connection table of control
plate GRANUDOS-S41C
Dosing cycle Dosing times chlorine - acid Dosing performance at 100% set with knob
Code switch S1 S2 S3 S4 max
1 minute off off 30-20 seconds off off 2,4 kg/h –1,3 l/h
^ 1 minute off off 40-10 seconds on off 3,2 kg/h –0,7 l/h
1 minute off off 20-20 seconds off on 1,6 kg/h –1,3 l/h
1 minute off off 10-10 seconds on on 0,8 kg/h –0,7 l/h
6 minutes on off at standard dosing times 30/20 sec. 0,4 kg/h –0,22 l/h
8 minutes off on at standard dosing times 30/20 sec. 0,3 kg/h –0,16 l/h
12 minutes on on at standard dosing times 30/20 sec. 0,2 kg/h –0,11 l/h
Connector S01 –mains 230 Volt Connector S02 –Pump / Chlorine valve
1L1 –braun phase 1 L1 –black 1 knocker
2N –blau neutral 2 N –black 2 knocker
3Sl –ge/gr earth 3 Sl –ye/gr knocker
4 Sl –ye/gr booster pump
5 N –blue booster pump
6 L1–brown booster pump
connector S03 –ext. contr. PH/Chlorine connector S08 –PH/Chlorine non volt
240 volt with cable to connector box
1–2 white-brown free chlorine 1–2 pH-value
3–4 green-yellow pH-value 3–4 free chlorine
Connector S04 –switches Connector S05 –switches
1 –2 white-brown acid empty 1 –2 bridge
3 –4 leakage dosing hose acid 3 + 24 VDC
5 –6 machine off by control centre 4 blue level high in tank
7 –8 filter disinfection 5 black - 24 VDC level switch
6 black flow switch venturi
7 blue –24 VDC flow switch
8 brown + 24 VDC flow switch
Connector S06 –switches Connector S07 –outputs
1 –2 machine off 1 –2 fault remote (NO)**
3 –4 wh-br pump pressure 3-4 wh-brown(4+) acid dosing pump
5 brown level low in tank 5-6 wh-brown (6+) dosing motor chlorine
7 –8 external monitoring switch 7-8 gr-ye (8+) heating dosing nozzle
** for low voltage < 40 volts only Fuse on front plate 3,15 Amp slow
F1 fuse primary 500mA delay
F2 fuse 24V complete 500mA delay
F3 fuse controller 315 mA delay
F4 fuse dosing motor chlorine
315 mA delay
S03
S07
S06
S05
S04
S01
S08
S02
F4
F3
F2
F1
Code
switch

WDT Operating instructions GRANUDOS 10 (S41C-03/10) page 19 of 21
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6 . Maintenance Check list GRANUDOS 10/45/100
Object:..........................................................................................................…….........……….....
GRANUDOS-Type:..................................................... series no...................…............
Maintenance executed by …………………………….. date:.......................……….......
Sign of pool operator:...........…………...............................................................…………….......
This has to be done This was necessary too 
1 Dissolving system
1.1 check level switch: OK [ ] change switch [ ]
1.2 check pressure switch: OK [ ] change switch [ ]
1.3 check flow switch: OK [ ] change switch [ ]
1.6 check function floating valve OK [ ] adjust water level [ ]
1.7 check connecting hose tank-flow switch holder [ ] change hose if brittle [ ]
1.8 check pump end plate (at Calpeda pump only) [ ] change pump end plate [ ]
1.9 check tightness of pump OK [ ] new slide ring seal [ ]
1.10 check ball bearings: is it noisy? OK [ ] new bearings [ ]
1.11 clean pre-filter, if polluted [ ]
2 Dosing chlorine
2.1 check function heating nozzle: OK [ ] change nozzle [ ]
2.2 check function empty switch: OK [ ] change switch [ ]
2.3 check dosing screw, clean it dry OK [ ] change screw [ ]
2.4 check power dosing motor: OK [ ] change motor [ ]
2.5 change sealing of dosing motor [ ]
2.6 check clamp bands and safety belt [ ] change [ ]
3 Dosing acid
3.1 check function empty switch: OK [ ] change empty switch [ ]
3.2 check function dosing pump OK [ ]: change pump [ ]
3.3 change dosing hose [ ] change roller [ ]
3.4 change acid valve insert [ ]
4 Additional jobs
4.1 clean GRANUDOS carefully: [ ]
4.2 clean environment of the GRANUDOS [ ]
……………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………

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7. Spare Parts list GRANUDOS 10-S4
Designation
Item no.
Chlorine. dosing
dosing hopper GR10 5 kg
12798
cover for dosing hopper GR 10
12353
dosing motor PLG 30-35
11676
motor holder PLG-d25 GR 10
12799
dosing screw GR10 d6/D19
12320
dosing nozzle heated GR
11556
knocker GR10 complete
12868
maintenance kit dosing motor
16369
Acid dosing
acid pump Sa complete
12374
pump housing Sa
14140
roller Sa
13039
dosing hose 3,2x1,6 N Sa
13413
supply carboy lance
12523
acid injection valve GR 1KFa
15099
repair set for acid valve
15764
Filter
filter housing
12746
filter top with ball valve d25
12304
O-ring on top
11258
Control system
control plate S41c
14200-1
transformer S4, 2x9 volt, 10VA
14383
main switch GR
11338
fuse holder GR
13960
knob 6mm S1/3
11031
cover control box GR10
12338
Floating valve
floating valve d25 GR10 complete
17006
diaphragm for floating valve
16367
non return valve d8 0,4 bar spring loaded GR10
16652
floater
11621
Level switch
level switch GR 10
10497
Booster pump
booster pump Lo HM04-Flux
24618-1
maintenance set: ball bearings, slide ring seal
17019
Flow switch
suction tube GR ½´´ -D40
25659
flow switch GR ind. 18x1 long lead
25671
connecting hose Si 10/2,5/170
11565
Venturi
venturi nozzle 1/2" Ti GR/PAK complete
24997
orifice washers for venturi-kit
11594
Cyclone
mixing cyclone GR 10
12329
Maintenance kit
For yearly maintenance: seals, diaphragms, fuses all GR
12631
8. Wiring diagram