S.I.T.A. 400 Series Reference manual

ULTRAVIOLET DISINFECTION
EQUIPMENT FOR THE TREATMENT OF DRINKING WATER
400 SERIES
DS PLUS
MANUAL OF INSTALLATION, USE AND SERVICING
English 01-2012 Rev. A

1
INDICE
1. Introduction..................................................................................................................................................2
2. General Principles .......................................................................................................................................3
3. Instruction for installation and servicing......................................................................................................5
3.1 Installation scheme recommended..............................................................................................................6
4. The UV Chamber Installation.......................................................................................................................7
4.1 Assembling of the UV chamber...................................................................................................................7
5. UV Controller .............................................................................................................................................12
5.1 Operation Flow Chart:................................................................................................................................13
5.2 Menu Readings:.........................................................................................................................................14
5.3 Menu Settings:...........................................................................................................................................15
5.3.1 Alarm Thresholds Settings .....................................................................................................................16
5.3.2 Flow Rate Settings (Optional on Request) .............................................................................................17
5.3.3 Intermittent Operation.............................................................................................................................18
5.3.4 Lamp Post Burn......................................................................................................................................18
5.3.5 Irradiance 4/20 mA Settings (Optional on Request)...............................................................................19
5.3.6 Cleaning System Settings (Optional on Request)..................................................................................19
5.4 Menu Operation:........................................................................................................................................20
5.4.1 Restart Counter......................................................................................................................................20
5.4.2 Maintenance Menu.................................................................................................................................21
5.4.3 Sensor Calibration..................................................................................................................................21
5.4.4 Manual cleaning......................................................................................................................................21
6. List of alarms and troubleshooting.............................................................................................................22
7. Replacement of motor shaft gasket for UV 400 RA series........................................................................25
8. Spare parts ................................................................................................................................................29
9. Reactor Dimensions ..................................................................................................................................29
10. Technical Data Sheet ................................................................................................................................29
11. Electrical Diagram......................................................................................................................................29
12. Warranty Condition....................................................................................................................................30
13. Declaration Of Conformity.........................................................................................................................31

2
1. Introduction
This manual is for the following models of UV 400 Series.
This Pressure UV Systems is manufactured by S.I.T.A. s.r.l.
Warning: This equipment requires regular maintenance to ensure the requirements of the drinking
water treated and the maintenance of the improvements as stated by the manufacturer.
These operating instructions contain important information for the operation and maintenance of the
equipment.
Please ensure that these operating instructions are carefully read by all relevant persons before putting
into operation, to ensure the safe use of the UV system. The operating instructions are an integral part
of the equipment supply.
Before putting into operation, all the conditions necessary for safe operation of the equipment must be
fulfilled.
The installation, commissioning and maintenance of the equipment should only be carried out by
qualified personnel.
The equipment should only be operated by authorized personnel who have been trained accordingly.
No modifications should be made to the equipment without consulting S.I.T.A., as this could effect the
safe operation of the unit. S.I.T.A. shall not be held responsible for damage resulting from unapproved
modifications.
INSTRUCTION
The operating instructions are to be kept where they will be accessible for operating and
maintenance personnel.

3
2. General Principles
The UV 400 SERIES sterilizers have been planned specially for destroying harmful bacteria and
viruses present in your water.
Their working is based on a physical principle which is a warrant of security: the output of ultra-
violet irradiation.
The UV light given out by special mercury fumes lamps (UV-C rays λ= 254nm) is highly
germicidal because it interacts with DNA and RNA, at a molecular level.
The deep bio-structural disorder caused by such irradiation interferes with the development and
the ability of reproduction of every kind of micro-organism, making it harmless.
Generally it is better to mount a pre-filter before the UV sterilizer, in this way the impurities of
every nature and consistence are kept.
This system comes to be necessary if we want to have a high degree of sterilization, infact the
non-filtration and removal of suspended particles in the water has, as a consequence, a decrease
of the sterilizer's efficiency.
If the water to be treated contains sulphydric acid or more than 0.3 p.p.m. of iron or filtrable
solids, once passed through the sterilizer, it leaves a residual sediment on the quartz sleeve,
which, therefore, must be periodically cleaned (the frequency depends on the quantity and quality
of water treated).
The sterilization equipment is constituted by different electronical and electromechanical
components assembled in such a way to realize effectively the sterilization process, giving a
bacteriologically pure water.
GENERAL DIRECTIONS
According to the European rules EN 60204-1 (safety of the set-up off the electrical equipment-
general rules) the low tension electrical instruments (rule 2006/95/CE) must be connected to a
current-tap provided with grounding.
SAFETY DIRECTIONS
The light of ultra-violet lamps can cause serious burns to unprotected skin and eyes, therefore it is
recommended not to connect it to the current tap without having before ensured the UV lamp in
its housing and inserted the PVC cover.
INDICATIONS FOR THE DISPOSAL
We remind that, according to what is fixed by D.L.25 july 2005, №151 “Accomplishment of
directives 2002/CE, 2002/96/CE and 2003/108/CE, concerning the reduction of the use of
dangerous substances in electric and electronic equipments, and the disposal of waste” both
mercury vapours lamps and electrical panels, when no more used, must be considered as special
waste, and in the same way disposed of.
To do that, it is possible to address to specialized centres for the recovery of dangerous materials,
or to contact directly our technical department.
ELECTRICITY
The lightning flash and arrowhead symbol is to alert the user to the presence of un-insulated
"DANGEROUS VOLTAGE” within the enclosure.
The equipment may only be opened if the mains supply is isolated. The mains supply must not be
restored as long as the equipment is open. This applies to both the electrical control panel and the
reactor vessel.

4
Attention:
Working on live equipment is forbidden.
INSTALLATION GUIDANCE
The reactor control panel utilises air cooling. The following guidelines must be adhered to when
locating the unit.
The reactor and control panel must not be located in a position where the ambient air temperature
exceeds 40ºC.
The reactor and control panel must not be located adjacent to other equipment that directly emit
heat
The reactor and control panel must not be located adjacent any chemical equipment that is likely
to emit fumes.
The reactor should be located within the piping system in such a manner as to ensure that
sufficient clearance is available in a horizontal direction to allow for lamp replacement and wiper
maintenance. See the relevant data information included in this manual.
The reactor must be positioned with the side flanged pipe connections pointing in an upwards
direction.
Never install the reactor in a position directly adjacent to chemical dosing points.

5
3. Instruction for installation and servicing
General premise
The installation of the UV 400 SERIES sterilizer units must be carried out by specialized staff,
scrupolously following the instructions given hereby. It has been moreover considered necessary
to give some general information about the electrical and water connections.
Cautions: check that the UV panel is not connected to the power supply and that the tap of the
water to be treated is turned off.
•Connect the delivery of the water to be treated to the special water connection
•Turn on water and check for possible leaks in any part of the unit
•Connect the plug to the current tap
•Check that the disinfected water comes out and that the LEDS on the panel of the control board,
signal the correct working
Let the disinfected water flow down to outlet for at least 10 minutes before using it, in order to
make the possible impurities present in the unit drain out.
NOTE: it is recommended to install a water filter directly before the UV sterilizer in order to
remove the suspended particles, eventually present in the water to be treated, which could limit
the efficiency of sterilization.
CHECKS
The UV 400 SERIES is ready for producing disinfected water, once the connection to the water
system and to the electrical grid is carried out. The unit works automatically, the electronical
boards which control the signals reaching the control panel, allow the visualization (or the
sonorization) of the correct working or of anomalies which may occur during the operating of the
unit.
MAINTENANCE
The UV System of UV 400 SERIES have been projected and realized by S.I.T.A. Srl with
simple and functional principles which make the checking procedures and the periodical servicing
particularly easy.
The main points which characterize the ordinary servicing are the following: check quarterly the
quartz sleeves, which contain the UV lamps, in order to ensure the maximum disinfection, for the
cleaning.
Maintenance work may only be carried out by personnel who have been trained and authorized
for this work by the owner and/or user. The owner and/or user must ensure that the maintenance
personnel are familiar with the safety measures and regulations, and that they also comply with
them, in addition to having read and understood the operating instructions.
Only original replacement parts from the supplier must be used.
The following are the recommended service intervals for replacement parts:
UV lamp change - once per 14000
hours
UV lamp o-ring change - once per year

6
3.1 Installation scheme recommended

7
4. The UV Chamber Installation
4.1 Assembling of the UV chamber
●Unscrew the s/s sleeve bolts (A) from both sides by using the key supplied.
●Insert the quartz sleeves (B) by using the special bar supplied and the o-rings 38x4 (C) on both sides
of the quartz sleeves.

8
●Screw again the s/s sleeve bolts (A) on both sides of the UV chamber, and carry out the hydraulic
test, verifying that the o-rings are watertight and that no water leaks outside the sleeve bolts or inside
the quartz sleeves.
●On the closed side of the UV chamber, mount the blind cap in black polyethylene (D), with the o-ring
2112 type (E) inserted and block by screwing the Ø 1 ¼” ring nuts (F) on the sleeve bolts.

9
●On the openable side of the UV chamber, insert the UV-C lamps (G) into the quartz sleeve previously
mounted.

10
●Connect to the UV-C lamps the 4-pins connectors (H) mounted as on the figure together with the Ø 1
¼” ring nuts (I), the PG9 nipples (L), and the 4-pins holders in black polyethylene (M) with the
pertinent o-rings 2112 type.
●Screw the Ø 1 ¼” ring nuts (I) on the s/s sleeve bolts.

11
●Mount the o-ring (N) (3043 type) on the probe holder (O) and screw this one on the Ø ¼” bush
welded in the middle part of the UV chamber.
Finally, connect the pertinente electrical cable.

12
5. UV Controller
The UV Controller has a 2 line x 16 character backlight LCD display, one general alarm LED and 4
Function Keys:
Function Keys
START/STOP/OK
-) When it’s pushed for more than 5 sec. it turns ON/OFF the UV System
-) In the menu of the display it ENTER the menu and confirm the parameters or the
operation
ESC
-) Back one level in the menu
UP
-) Increase the parameters
-) Move UP through the menu
DOWN
-) Decrease the parameters
-) Move down through the menu

13
5.1 Operation Flow Chart:
Cycling View Level
It’s the standard working level. It shows cyclically the Date and time, the 2 hour meters and the UV
Irradiance (Dose). H Tot is the total UV System lifespan. H Lamp is a “count down” from the last
lamps replacement.
Menu Directory Level
It’s the Main Menu level. Four different menus are available:
Readings: It’s the Menu in which the user can read all the parameters that the system is reading or has
memorized.
Settings: It’s the Menu in which the user can set all the parameters useful for the measurements and the
system working.
Operations: It’s the Menu in which the user can operate on the UV system.
Password: It’s a menu protected by the user. The user cannot enter this menu if not allowed by the
producer.
Irradiance:
400 J/m2
H Tot: 76
H Lamp: 8.924
UV system
10:47 4/09/2010
System OFF!
OR OR
> 3
sec
Cycling View Level Menu Directory Level
MENU
Readings
MENU
Operations
MENU
Settings
MENU
Password
Start UP
> 3
sec

14
Temp. Chamber
20°C
Temp. Panel
25°C
Irradiation:
210 W/m
2
H TOT: 20
H Lamp: 8980
Start Up Number:
23
Lamp Changes:
2
17:20 03/08/2010
MON
Software Ver:
BETA 1
MENU
Readings
Flow Rate:
200 m
3
/h
5.2 Menu Readings:
It is the Menu in which the user can read all the parameters that the system is reading or had
memorized.
Flow Rate: Visible if a flow meter is connected to the UV System.
It shows the water flow in m
3
/h passing through the UV system.
Temp. Panel: It shows the electrical panel internal temperature.
Temp. Chamber: Visible in case of Rack Plus or SMP systems. It
shows the water temperature inside the UV chamber.
Irradiation: Visible in case of Rack Plus or SMP systems. It
monitors the UV-C output through an UV sensor which is installed
into the UV chamber. The sensor signal can be shown in a relative
display (%) or in an absolute display in W/m
2
. If the flow signal is
available the system can calculate the UV Dose and so the
Irradiance will be expressed in J/m
2
.
A drop in the sensor signal can be caused by:
∼ Deposits on quartz sleeves lamp protection
∼ Deposits on quartz of the UV sensor
∼ Significant variation on UV transmittance of the water
∼ Decrease of the UV-C output in lamp(s) due to the lamp
ageing
H Tot: It’s the total UV System lifespan.
H Lamp: It’s a “count down” from the last lamps replacement (see section “Operations” regarding how
to restart the “count down”)
Start UP Number: It’s the total number of start up of the system. Too much start/stop of the lamp can
damage them and decrease their efficiency.
Lamp Changes: It’s the total number of changes of the lamp. The system incorporate “count down”
from the last lamps replacement. When this is zero an alarm informs that You have to change the
lamps. On every lamps replacement the H Lamp count down must be reactivated and the N° of Lamp
Changes increases of one.
Date and Hours: It visualizes the current date and hours.
Software Version: It visualizes the software version.

15
5.3 Menu Settings:
It’s the Menu in which the user can set all the parameters useful for the measurements and the system
working.
Language: Set the language of the display.
Timer: Set Date and Hour
Alarm thresholds: Set the alarm max and min values (see section “Set Alarm threshold”)
Flow Rate Settings (optional): Visible if a flow meter is connected to the UV System. Set the
parameters useful for the flow rate alarms and/or readings (see section “Flow Rate Settings”).
Intermittent operation: Set the start and the stop hour of the UV system (see section “Intermittence
operation”).
Lamp Post Burn: Set the post Burn time (see section “Post Burn”)
4/20 mA IRR (optional): Visible if the 4/20 mA optional is available. Set the 4/20 mA output for the
Irradiance (See section “Irradiance 4/20 mA settings”).
Cleaning System Settings (optional): Set Day of the week, hours and N° of cycles of the cleaning
system start.
Set Up Language
English
Alarm Thresholds
ENTER
Set Up Timer
Intermittent Operation
ON/OFF
Lamp Post Burn:
ON/OFF
MENU
Settings
4/20 mA IRR Setting:
ENTER
Flow Rate Settings
ENTER
Cleaning System
Settings

16
5.3.1 Alarm Thresholds Settings
In this menu the user can set the alarm values:
Max Temperature Chamber: Visible in case of Rack Plus or SMP systems. This threshold level
define the max allowed water temperature in the UV chamber.
In case of flow absence the UV lamp(s) can increase the water temperature. This can damage
the lamps and the UV system. If the water temperature is higher then 40°C then the system
will shut off automatically and a message “SYSTEM OFF, HIGH TEMPERATURE” is
shown.
Factory Settings: 40°C
Pre-alarm Low Irradiation: Visible in case of Rack Plus or SMP systems. If UV output drops under
this warning threshold then a warning is registered. To avoid signal falling below safety threshold, carry
out immediate cleaning of lamp quartz sleeve or replace the lamp or improve water quality with
suitable pre- treatment.
Important! The sensor signal can be shown in a relative display (%) or in an absolute
display in W/m
2
. If the flow signal is available the system can calculate the UV Dose and so
the Irradiance will be expressed in J/m
2
. In all these case the threshold level has the same
unit of measurements.
Important! The warning threshold must be higher then the safety threshold.
Alarm Low Irradiation: Visible in case of Rack Plus or SMP systems. If UV output drops under this
threshold level then an alarm is registered.
Water that passes through the UV system when the irradiation is under this level can be non-
completely disinfected. Carry out immediate cleaning of lamp quartz sleeve or replace the
lamp or improve water quality with suitable pre- treatment.
Relays switch when irradiation is under this safety threshold.
Alarm Threshold
ENTER
Max Temperature
Chamber: 80°C
Pre-Alarm Low
Irradiation.: 500 J/m
2
Low Irradiation:
400 J/m
2

17
5.3.2 Flow Rate Settings (Optional on Request)
Available only in case that the UV system is provided with a flow meter or connected to an external
one. Set the parameter useful for the flow rate alarms and/or readings (see section “Flow Rate
Settings”).
Flow Meter ON/OFF: Set if the flow meter is available.
20 mA = : The UV system can read a 4/20 mA signal from the flow meter. If the flow meter is external
then the customer must set the correspondence between 20 mA and the flow rate measured.
4 mA = : The UV system can read a 4/20 mA signal from the flow meter. If the flow meter is external
then the customer must set the correspondence between 4 mA and the flow rate measured (usually 4
mA is 0 m
3
/h).
Never associate to 4 mA a flow rate higher than the correspondent to 20 mA.
Check Max Flow: Set if the user need to check the max flow rate and so to have an alarm in case the
flow rate is over this threshold level.
A too high flow rate can destroy the quartz sleeve or reduce the contact time with the UV so that the
water is not enough disinfected.
Check Min Flow: Set if the user need to check the min flow rate and so to have an alarm in case the
flow rate is lower then this threshold level.
Shut off for min flow: Turn off the lam(s) in case of water flow rate through the UV system lower then
the threshold level set in the previous section.
A too low flow rate can increase the water temperature and so ruin the UV system.
Shut off for no flow: Turn off the lamp(s) in case the water flow rate is 0 m
3
/h.
In case of flow absence the UV lamp(s) can increase the water temperature. This can damage the lamps
and the UV system. If the water temperature is higher then 40°C than the system will shut off
automatically and a message “SYSTEM OFF, HIGH TEMPERATURE” is shown. To prevent this the
user can decide to turn off the lamp immediately when the flow rate is 0 m
3
/h.
Flow Meter
ON/OFF
4 mA = 0 m
3
/h
20 mA = 700 m
3
/h
Shut off for min flow
ON/OFF
Check Max Flow
ON/OFF
Flow Rate Settings
ENTER
Check Min Flow
ON/OFF
Shut off for NO flow
ON/OFF
Max Flow =
700 m
3
/h
Min Flow =
100 m
3
/h

18
5.3.3 Intermittent Operation
Menu visible only if the remote ON/OFF option is disconnected in the password menu.
In this menu the user can set the automatic start up and shut off hour of the UV Lamp(s).
If the system is OFF the next start up hour will be visualized in the display.
If the system is ON the next shut off hour will be visualized in the display.
5.3.4 Lamp Post Burn
The user should prevent that water insufficiently disinfected may reach the consumer. Lamp post burn
delay time avoids that water insufficiently disinfected can pass during the start up.
Usually during the start up the alarms are inhibited, if post burn delay time is ON then the alarms relays
are switched for all the post burned time. If automatic valves are connected to the UV systems relays
then this will remain close for all the post burn time. As results the water will not pass during the start
up time. Below time flow chart with identification of the valve position:
Lamp Post Burn:
ON/OFF
Post Burn
120 sec.
Intermittent Operation
ON/OFF
ON: 08:30
OFF: 17:30

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5.3.5 Irradiance 4/20 mA Settings (Optional on Request)
The UV system can have an 4/20 mA output available as optional.
This signal is available for the chamber temperature and the UV irradiance. The temperature signal is 4
mA for 0 °C and 20 mA for 100°C. The Irradiance 4/20 mA signal can be set by the user:
For example the user can associate 4 mA to 0% and 20 mA to 110% of irradiance. In case the
irradiance is shown in absolute measurement units (W/m
2
or J/m
2
) the association can also be done by
the customer (ex: 4 mA to 0 W/m
2
and 20 mA to 230 W/m
2
).
5.3.6 Cleaning System Settings (Optional on Request)
Set the day of the week and the hours and the n° of cleaning cycles. The cleaning system of the rack
quartz sleeves will start automatically at the hours and date day of the week. In case of one cycle the
cleaning system starts from one side arrives at the opposite side of the quartz and then comes back. In
case of 2 cycles this operation is done twice.
4/20 mA IRR Setting:
ENTER 20 mA = 100%
4 mA = 0% (*)