Ariston GENUS 30 Plus User guide

End User, Installation &
Servicing Instructions
Type C Boilers
G.C.N: 47-116-28
LEAVE THESE INSTRUCTIONS
WITH THE END USER
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1. General Information
2. Control Panel
3. How to Use
4. Anti-Frost Device
5. Maintenance
6. Trouble Shooting
7. Filling Instructions
8. Time Clock
8.1 Setting the Mechanical Clock
8.2 Setting the Digital Clock
9. General Information for the Installer
9.1 Overall View
10. Installation
10.1 Delivery
10.2 Reference Standards
10.3 Siting the Appliance
10.4 Clearances
10.5 Overall View
10.6 Mounting the Appliance
10.7 Electrical Connection
10.8 Gas Connection
10.9 Water Connections
11. Connecting the Flue
11.1 Flue Connections
11.2 Fitting the Coaxial Flue (Ø 60/100 mm -
Horizontal)
11.3 Fitting the Telescopic Flue (Ø 60/100 mm -
Horizontal)
11.4 Fitting the Coaxial Flue (Ø 60/100 mm - Vertical)
11.5 Fitting the Twin Pipe (Ø 80/80 mm)
12. Electrical Connections
13. Electrical System Diagrams
14. Water Circuit Diagrams
15. Commissioning
15.1 Initial Preparation
15.2 Completion
15.3 Removal and Fitting of the Case - Servicing
15.4 Control Panel
15.5 Initial Start-Up
15.6 Sequence of Operation
15.7 Operational Adjustments
15.8 Combustion Analysis
15.9 Boiler Safety Systems
TABLE OF CONTENTS
16. Gas Adjustments
16.1 Changing the Type of Gas
17. Maintenance
18. Servicing Instructions
18.1 Replacement of Parts
18.2 To Gain General Access
18.2.1 Removing the front panel
18.2.2 Removing the control panel
18.3 Access to the Control System
18.3.1 Removing the main PCB
18.3.2 Removing the display PCB
18.3.3 Removing the fuses
18.3.4 Removing the programmer
18.4 Access to the Sealed Chamber
18.4.1 Removing the sealed chamber front panel
18.4.2 Removing the combustion chamber front panel
18.4.3 Removing the burner
18.4.4 Removing the electrodes
18.4.5 Removing the burner manifold
18.4.6 Removing the main exchanger
18.4.7 Removing the air pressure switch
18.4.8 Removing the fan
18.5 Access to the Gas Valve
18.5.1 Removing the spark generator
18.5.2 Removing the gas valve
18.6 Access to the Water Circuit
18.6.1 Drain down
18.6.2 Removing the display PCB
18.6.3 Removing the heating return filter
18.6.4 Removing the by-pass
18.6.5 Removing the pressure relief valve (3 bar)
18.6.6 Removing the pressure relief valve (6 bar)
18.6.7 Removing the temperature & pressure relief
valve (7 bar)
18.6.8 Removing the pump
18.6.9 Removing the expansion vessel
18.6.10 Removing the overheat thermostat
18.6.11 Removing the heating temperature sensor
18.6.12 Removing the tank temperature sensor
18.6.13 Removing the DHW flow switch
18.6.14 Removing the DHW expansion vessel
18.6.15 Removing the flow limiter
18.6.16 Removing the tank
19. Fault Finding Guide
20. Short Spares List
21. Technical Information

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Dear Customer,
Thank you for choosing an ARISTON boiler.
We guarantee that your boiler is a reliable and technically sound product.
The following Instructions provide detailed instructions and recommendations for proper installation, use and maintenance.
Remember to keep this manual in a safe place for future reference e.g. by the gas meter.
Your local MTS Servicing Centre is at your complete disposal for all requirements.
MTS (GB) Limited
Every attempt has been made to avoid
errors of any kind in this instruction
manual, the Management invites
customers to inform of any
inaccuracies which they may find. This
will help to improve our service.
The guarantee on this appliance is valid
for 24 months from the first day of
installation.
Repairs to the electric, hydraulic or gas
circuits may be carried out only by your
local authorised MTS Servicing Centre.
IMPORTANT
Please read this manual carefully.
Please ensure this manual is kept with the appliance so that they can be used by the end-user, installer or our authorised engineer.
CAUTION
Installation, start-up, adjustments and maintenance must be
performed by a competent person only, in accordance with the
current Gas Safety (Installation & Use) Regulations and the
instructions provided. Improper installation may cause damage or
injury to individuals, animals and personal property, for which the
manufacturer will not be held liable.
To ensure efficient and safe operation it is recommended that the
boiler is serviced annually by a competent person.
If it is known or suspected that a fault exists on the appliance, it must
not be used until the fault has been corrected by a competent person.

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MTS (GB) Limited support the initiative. Your installer will give
you, and show you how to use, a Log Book which will give you
important information about your boiler and heating system. Please
have this Log Book to hand whenever you contact a service engineer or
us.
All CORGI Registered Installers carry a CORGI ID card, and have a
registration number. Both should be recorded in your boiler Log
Book. You can check your installer is CORGI registered by calling
CORGI direct on :- [phone].
This is a combined appliance for the production of central heating (C.H.)
and domestic hot water (D.H.W.). This appliance must be used only
for the purpose for which it is designed. The manufacturer declines all
liability for damage caused by improper or negligent use.
Do not allow children or inexperienced persons to use the appliance
without supervision.
If you smell gas in the room, do not turn on or off light switches, use
the telephone or any other object which might cause sparks.
Open doors and windows immediately to ventilate the room.
Shut the gas mains tap (on the gas meter) or the valve of the gas
cylinder and call your Gas Supplier immediately.
If you are going away for a long period of time, remember to shut the
mains gas tap or the gas cylinder valve.
Before any intervention within the boiler it is first necessary to cut
off the electrical power supply by turning the external switch to the
off position.
1. GENERAL
INFORMATION
2. CONTROL PANEL
P1 P2
OFF ON
1234 1 234
00
R
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25
26
27
29
31
28
30
33
32
Legend:
25 - Selector Knob :
Central Heating and Hot Water
Hot Water Only
OStand-by
Central Heating Only
26 - D.H.W. temperature control knob
27 - C.H. temperature control knob
28 - Heating temperature indicator and diagnostic
indicator
29 - Green indicator - Power ON
30 - Orange indicator - Burner ON
31 - Red indicator - Lock out / flame failure
32 - Reset button
33 - Pressure gauge
34 - Time clock (digital model shown)
34

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3. HOW TO USE
P1 P2
OFF ON
1234 1 234
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25
26
27
2931
28
30
33
32
Switching on
1. Check that the pressure in the heating system is
adequate, i.e. the pressure gauge 33 shows 1 bar
minimum and 1.5 bar maximum.
2. Check that the gas service tap 39 (Fig. 3.3) is opened
(Figs. 3.1 and 3.2) and that the mains power is on,
the green indicator 29will light.
The boiler is now ready to use.
Note : If the boiler has been turned off for some time,
the presence of air in the gas pipe may result in a
lockout.
To obtain hot water only
-Turn the selector switch 25tothe « » position, the
green LED 29will light; the orange LED 30will light to
indicate that the burner is alight.
-To adjust the temperature of the domestic hot water,
it is necessary to rotate the control knob 26 «»
clockwise to increase and anti-clockwise to decrease
the temperature until the desired temperature is
achieved.
NOTE
On initial start-up, if the boiler has been switched off
for any period of time or when the storage tank is
emptied of hot water, it will be necessary for the
storage tank to be heated before hot water can be
drawn. It will also be necessary for occasional re-
heating of the storage tank to maintain the
temperature set on the hot water control knob 26 (this
will happen automaticall as long as the boiler is
powered, operating normally and the selector switch
25 is set to one of the hot water positions or
).
To obtain central heating and domestic hot water
-Turn the selector switch 25 to the « »position, the
green LED 29 will lightt; the orange LED 30 will light to
indicate that the burner is alight.
-Upon a demand for domestic hot water the operation of
the central heating will be interrupted until the hot water
tank has been reheated to the set temperature.
-The control knob 27 « » allows you to adjust the
water temperature in the central heating circuit
according to seasonal requirements.
-Turn the control knob 27:
-Clockwise in cold weather
-Anti-clockwise in mild weather (by turning the knob
fully anti-clockwise, the Central Heating will switch
off).
-The LEDs 28 will display the temperature of the
water in the central heating circuit.
-Furthermore, your home must be fitted with a room
thermostat, ensure it is set to the desired indoor
temperature.
-The orange LED 30 will light each time the burner
operates.
34
+
+
+
+
FIG.3.1 FIG.3.2
GAS COCK CLOSED GAS COCK OPEN
FIG.3.3
39

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To obtain central heating only
-Turn the selector switch 25 to the « » position, the green LED
29 will light.
- Ensure that the time clock is on (see SECTION 8), and that the room
thermostat is calling for heat.
-The control knob 27 « » allows you to adjust the water
temperature in the central heating circuit according to seasonal
requirements.
-Turn the control knob 27:
-Clockwise in cold weather
-Anti-clockwise in mild weather (by turning the knob too far, the
Central Heating will switch off).
-The LEDs 28will display the temperature of the water in the
central heating circuit.
-Furthermore, your home must be fitted with a room thermostat, set
it to the desired indoor temperature.
-The orange LED 30will light each time the burner operates.
Stopping the central heating
-Turn the selector switch 25 to the “ ” position. In this state the
boiler will only produce domestic hot water, alternatively, you can
turn the time clock off or turn the room thermostat down.
Stand-by mode
-Turn the selector switch 25 to the «O»position, the green LED 29
will remain alight. The appliance will remain in stand-by mode
unless the anti-frost device is activated.
Turn off the appliance*
-Turn the selector switch 25 to the «O»position
-Turn off the external power supply to the boiler.
* NOTE: IN THIS STATE THE APPLIANCES ANTI-FROST DEVICE IS INACTIVE
The boiler is fitted with a device, which in the event that the water
temperature falls below 8oCthe pump activates and runs until a
temperature of 18oCis attained. In the event that the water
temperature falls below 3oC, the diverter valve switches to Domestic
Hot Water and the burner fires on minimum power until a
temperature of 33oCis attained.
This device is only activated when the boiler is operating perfectly
and
-the system pressure is sufficient;
- the boiler is powered electrically;
- gas is available.
Schedule an annual maintenance check-up for the boiler with a
CORGI registered Service Engineeer in the UK and with a competent
person as described in I.S.813 for IE.
Correct maintenance always results in savings in the cost of running
the system.
4. ANTI-FROST DEVICE
5. MAINTENANCE

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6. TROUBLE
SHOOTING Incorrect functions are signalled by the diagnostic
indicator LED 31 display flashing. Contact your local
authorised Servicing Centre (unless a low water fault is
indicated, in which case refer to Section 7 for filling
instructions).
P1 P2
OFF ON
1234 1 234
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31
7. FILLING
INSTRUCTIONS A method for initially filling the system and replacing lost
water during servicing and initial filling (in accordance with
current Water Regulations), is provided as an integral part
of the connection kit (see Fig. 7.1).
To fill the system and replace lost water it is necessary to
proceed as follows:
- Switch off the power to the boiler;
- Ensure that the flexible hose is connected to both the
cold water inlet connection and the C.H. flow
connection;
- Open the black lever on the valve for the C.H. return
connection and slowly open the black handle on the
valve for the cold water inlet until water is heard
passing through the valves;
- Once the pressure gauge 33 (Fig. 6.1) reads between
1and 1.5 bar close the levers on both the cold water
connection and the C.H. return connection
- Switch the power to the boiler back on.
NOTE:THE FLEXIBLE HOSE MUST BE REMOVED ONCE THE
SYSTEM HAS BEEN FILLED.
FIG.7.1
33
FIG.6.1

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8. TIME CLOCK
1.General layout
The mechanical clock covers a 24 hour period. Each tappet represents
15 minutes A(Fig. 4). An override switch is located on the clock B (Fig
8.1).
2.To set the time
To set the time of day, grasp the outer edge of the dial and turn slowly
clockwise until the correct time is lined up with the arrow C(Fig. 8.1).
3. To Set the "On" and "Off" times
The clock uses a 24hours system. e.g. 8 = 8.00 am and
18 = 6.00 pm "ON" periods are set by sliding all tappets between the
"ON" time and the "OFF" time to the outer edge of the dial.The tappets
remaining at the centre of the dial are the "OFF" periods.
4. For operation
Put the selector switch Bto the symbol to control the central heating
by the clock. Put the switch Bto «I»to select permanent operation or to
«0»to turn the central heating off permanently.
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2121
2222
2323
2424
99
66
1212
I
A
C
B
8.1 Setting the Mechanical Clock
FIG.8.1

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P
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Manual switch
Summer and
winter time
setting
Reset
Enter
weekday/s
Enter
the hours
Week-
days
flash
Enter
minutes
Enter
switching
times
Imput
time
Automatic Manual Continuous
Operation Operation Operation
The switching If the current You can only
times corres- switching mode is return to automatic
pond to the changed manually, mode from the
program the next switching continuously-ON
entered. time will be and continuously-
 carried out auto- OFF switching
 matically again modes by
 according to the pressing the " "
 entered switching key.
 program.
= ON = ON = Continuously ON
= OFF = OFF = Continuously OFF
Operating the time switch
The steps marked with the symbol “ ” are necessary to carry out a
switching program.
Preparing for Operation
Activate the “Res” switch (=RESET) to reset the time switch to its
default setting (activate using a pencil or similar pointed instrument).
Do this:
-every time you wish to “reset” the time switch
-to erase all switching times and the current time of day.
After approximately two seconds the following display appears:
Enter current time and weekday
-Keep the “ ” key pressed down
During the summer time period press the +/- 1h key once.
Enter the hour using the “h” key
Enter the minutes using the “m” key
Enter the day using the “Day” key
1=“Monday”..............7 = Sunday
-Release the “ ” key.
Entering the switching times
You have 20 memory Iocations available. Each switching time takes
up one memory location.
Keep pressing the “Prog” key until a free memory location is shown in
the display “– –:– –”.
8.2 Setting the Digital Clock

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Programme ON or OFF with the “ ” key:
“ ”= OFF; “ ”= ON
Enter the hour using “h”
Enter the minutes using “m”
If a switching command is to be carried out every day (1 2 3 4 5 6
7) then store using the “ ” key, otherwise select the day(s) it is to
becarried out by using the “Day” key.
When the day seIection is left bIank, the programmed switching
instruction operates at the same time every day
123456 = Monday – Saturday
12345 = Monday – Friday
67 =Saturday – Sunday
Selection of single days: 1 = Mon. .............. 2 =Tues.
Save the switching time with the “ ” key.
The time switch enters the automatic operating mode and displays
the current time of day.
Begin any further entry of a switching time with the “Prog” switch. If
your entry is incomplete, the segments not yet selected will blink in
the display. After programming is completed, and you return the
time clock to the current time display with the “ ” key, the time
clock will not activate any switching instruction required for the
current time. You may need to manually select the desired
switching state with the “ ” key. Thereafter, as the unit
encounters further switching instructions in the memory in real time,
it will correctly activate all subsequent switching instructions.
Manual Override Switch “ ”
With the “ ” you can change the current setting at any time. The
switching program already entered is not altered.
Reading the programmed switching times
Pressing the “Prog” key displays the programmed switching times until
the first free memory location appears in the display “– – : – –”.
If you now press the “Prog” key once again, the number of free memory
Iocations will be displayed, e.g. “18”. If all memory locations are
occupied, the display “00”appears.
Changing the programmed switching times
Press the “Prog” key repeatedly until the switching time you want to
change is displayed. You can now enter the new data. See point
“Entering the switching times”.
Notes on storing switching times:
If you end your entry of the switching times by pressing the “Prog” key,
then the switching time you have entered will be stored and the next
memory location displayed.
In addition, a complete switching command is stored automatically
after around 90 seconds provided no other key is pressed. The time
switch then enters the automatic operating mode and displays the
current time again.
Deleting individual switching times
Press the “Prog” key repeatedly until the switching time you wish to
delete is shown in the display. Then set to “– –” using the “h” or “m” key
and keep the “ ”key pressed down for around 3 seconds. The
switching time is now erased and the current time is displayed.
AM / PM time display
If you press the “+/-1h” and “h” keys at the same time, the time display
switches into the AM/PM mode.