4
GENERAL NOTES AND CARE OF YOUR SYSTEM
1 On/Off
switch
- This switch (switch push button in for on, out for off) turns the boiler and the timer on
and off. The green light on the switch indicates it is in the on position.
2 'Summer/Winter'
switch
- This switch (switch push button in for winter, out for summer) allows you to
switch off the central heating in the summer. It does not effect the supply of hot water for the taps. The
green light on the switch indicates it is in the winter position.
Winter - Heating and Hot Water
Summer- Hot Water Only
3 Heating temperature control
- This control allows the temperature of the water leaving the boiler for the
heating system to be adjusted. Turning it clockwise increases the temperature.
4 Hot water temperature control
- This control allows the temperature of the water leaving the boiler for
the hot taps to be adjusted. Turning it clockwise increases the temperature.
5 Temperature/pressure
gauge
- This indicates the central heating system water temperature and
pressure. The grey pointer indicates the actual pressure, which will increase as the system warms up.
The red pointer indicates the system pressure (boiler off and system cold) set by your installer.
Do not operate the boiler if the grey pointer falls below the red pointer. Contact your Service Engineer to
have the system re-pressurised.
6 Lockout reset button
- If there is a burner control malfunction, a built-in safety circuit switches the boiler
off and the lockout reset button will light. Usually such malfunctions are short lived, and pressing the
reset button (press in and release quickly) will restore normal operation.
If the boiler continually goes to 'lockout' a fault exists and you will need to call your Service Engineer.
7 Safety
valves
- The boiler is fitted with safety valves to release excess pressure from the central heating
or hot water system if it overheats. If water or steam is discharged from the end of theses pipes, switch
off the boiler and contact your Service Engineer. Your installer should have informed you where these
pipes terminate.
8
Clearances and ventilation - Always ensure that the boiler has the following minimum clearances for
safety and servicing:-
Top: 300 mm, Front: 600 mm, Sides: 5 mm
If the boiler is installed in a compartment, your Installer will have provided ventilation openings in the
wall or door. Do not obstruct these openings, periodically check that they are clear.
Do not place any combustible material around or on the boiler or flue pipe.
9 Flue
terminal
- The flue terminal on the outside wall must not be obstructed or damaged.
In cold weather steam might appear from the terminal - this is quite normal for a high efficiency boiler.
In severe conditions check that the terminal does not become blocked by snow.
10 Frost protection
- The boiler is fitted with built-in frost protection. This will automatically start the boiler if
the water temperature falls below 5°C, providing the electrical supply to the boiler is on, the On/Off
switch is set to on and the Summer/Winter switch is set to winter.
11 Cleaning and servicing
- Lightly wipe over the case with a damp cloth and a little detergent. Do not use
abrasive pads or cleaners.
You should have your boiler serviced at least once a year to ensure safe and efficient operation.
Contact your Service Engineer for further details.
12 Failure of mains services
- If the electricity supply fails, the boiler will not operate. Once it is restored
the boiler will resume its normal operation.
Note
: The timer has a built-in battery to retain the time, date and programmes.
If the mains water supply is ever cut off, the boiler will not supply domestic hot water. It will however, still
provide central heating.
13 Gas leak
- If a gas leak is suspected, turn off the gas supply and contact your local Gas Region or
Service Engineer.
Remember - do not operate electrical switches, smoke or light matches.
ELECTRICITY SUPPLY
The boiler requires a 230V ~ 50Hz supply. It must be protected by a 3A fuse.
Warning: This appliance must be earthed.
Summary of Contents for RIO 140
Page 33: ...10 WIRING DIAGRAMS 33 10 1 ILLUSTRATED WIRING DIAGRAM ...
Page 34: ...10 WIRING DIAGRAMS 34 10 2 FUNCTIONAL FLOW WIRING DIAGRAM ...
Page 35: ...11 SEQUENCE OF OPERATION CHARTS 35 11 1 AUTOMATIC IGNITION SEQUENCE ...
Page 36: ...11 SEQUENCE OF OPERATION CHARTS 36 11 2 OPERATION IN CENTRAL HEATING MODE ...
Page 37: ...11 SEQUENCE OF OPERATION CHARTS 37 11 3 OPERATION IN DOMESTIC HOT WATER MODE ...
Page 47: ...NOTE 47 ...
Page 54: ...6 ELECTRONIC TIMER Description of controls see Figs 3 and 4 ...
