Centurion WM 2.5 User Instructions

Brand: Centurion

Model: WM 2.5

Category: Thermostats

Type: User Instructions

This manual is also suitable for

WM 3.5

Centurion WM 2.5 is a wall-mounted, instantaneous combination boiler designed for use with natural gas. It offers fully automatic operation with a microprocessor-based control system and a balanced flue. With outputs ranging from 8.8 kW to 22.0 kW for central heating and 6.3 kW to 27.7 kW for hot water, it provides efficient heating and hot water for your home.

CENTURION

2.5

3.5

Wall-Mounted Fan-Assisted Gas-Fired

Instantaneous Combination Boiler

s .

InstructIons

Centurion WM 2.5

WM 3.5

G. C. No 47 13003

FOR NATURAL GAS ONLY

Part No PL35984

ISSUE 2

DATE March 1997

57030

INDEX

Gas safety (Installation and use Regulations 1994) 1

Gas leak warning 1

General Description 1

Method of operation 1

Gas Consumer Council 2

Boiler Clearances 2

Ventilation 2

Lighting the Boiler 2

Toturn off the Boiler 3

Operation of Controls 3

Central Heating Timer Operation 3

General Notes and Care of your system 5

Servicing and Maintenance 6

Cleaning 6

Spare Parts and Service 6

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GAS SAFETY (INSTALLATION AND USE)

REGULATIONS 1994.

It is the law that all gas appliances are installed by a CORGI

registered person, in accordance with the above regulations.

Failure to install appliances correctly could lead to

prosecution. It is in your own interests, and that of safety, to

ensure that the law is complied with.

WARNING

It is essential that the appliance is correctly earthed. An

electricity supply of 230V ~ 50 Hz is required fused at 3

Amp.

Manufacturers instructions must not be taken as overiding

either statutory or LocalAuthority Regulations.

If a gas leak is suspected or exists, turn the gas supply

OFF at the incoming mains (adjacent to the meter) and:

Do not operate any electrical appliance.

Do not operate any electrical switches.

Open all doors and windows.

Do not smoke.

Extinguish all naked lights.

Contact your gas supplier immediately.

READ THESE INSTRUCTIONS CAREFULLY BEFORE

ATTEMPTING TO OPERATE THE APPLIANCE.

IF A FAULT IS KNOWN OR SUSPECTED, DO NOT USE THIS

APPLIANCE UNTIL IT HAS BEEN REPAIRED BY A

COMPETENT PERSON

GENERAL DESCRIPTION

The Centurion WM 2.5 Is a wall mounted instantaneous

combination boiler with a fully automatic microprocessor based

control system and a fan assisted balanced flue. The appliance

has been designed for use on a sealed water central heating

system and is suitable for use with natural gas only.

The appliance provides central heating at outputs between 8.8

kW (30,100 Btu/h) and 22.0 kW (75,000 Btu/h). Hot water is

produced at outputs between 6.3 kW (21,600 Btu/h) and 27.7

kW (94,500 Btu/h).

Incorporated within the appliance are:

a User adjustable controls for domestic hot water and central

heating water temperature.

b A pump, expansion vessel, pressure gauge, overheat

thermostat and frost thermostat.

c A multi-directional concentric balanced flue

d A fully modulating gas control to ensure that precise output

is matched to demand.

e A two speed fan to maintain high operating efficiency at all

heat inputs.

Optional features include:

a An integral electronic timer for central heating operation.

b A WM SIB pack (fitted behind the appliance) to enhance

domestic hot water performance.

The boiler is fully automatic once switched on, and will supply

hot water whenever a hot tap is opened and central heating

whenever there is a demand for heat.

METHOD OF OPERATION

Note: If the optional timer is fitted this controls the operating

times of the central heating, domestic hot water is available

continuously.

The supply of domestic hot water always takes priority over

central heating. If a demand for hot water is required during a

central heating period, the boiler will automatically switch to

57030

the hot water mode until the demand is satisfied. This

interruption in the central heating is only when the demand for

hot water is present and should not be noticed.

NOTE If the optional WM SIB is fitted, the boiler will operate

for a few minutes approximately once every four hours to

maintain the temperature within the WM SIB.

GAS CONSUMER COUNCil

The Gas Consumer Council (GCC) is an independent

organisation which protects the interest of gas users. If you

need advice, you will find the telephone number in your local

directory under 'Gas'.

CLEARANCE REQUIRED FOR INSTAllATION AND

SERVICING.

The following MINIMUM CLEARANCES must be available for

installing and servicing the boiler. DO NOT restrict this space

by the addition of shelves etc.

Right hand side 5 mm (1/4 in)

Left hand side

5 mm (1/4 in)

Top (above casing) 250 mm (10 in)

Bottom (below casing)

200 mm (8 in)

Front

450 mm (18 in)

VENTilATION

No purpose provided air vents are required in a room

containing this appliance (Le. appliance is room sealed). If the

appliance is installed in a cupboard or compartment,

ventilation must be provided. Permanent air vents are required

in the cupboard or compartment, at high level and at low level,

either direct to outside air or to the room. Both high and low

level air vents must communicate with the same room or must

both be on the same wall to outside air. DO NOT allow these

ventilation openings to become obstructed.

TO LIGHT THE BOilER

(Refer to Figure 1)

IF OPTIONAL TIMER IS FITTED:

a Ensure that the gas and water supplies are turned on, the

electricity supply to the boiler is off, the Mains ON/OFF switch

is set to OFF, the timer is correctly set (refer to figure 2), and

the room thermostat (if fitted) is set at the desired setting. Set

the central heating OFF / ON / TEMPERATURE CONTROL to

the desired temperature (normally maximum if a room

thermostat is fitted - unless radiators are likely to be touched

by children or elderly persons)

b Switch ON the electricity supply to the boiler and turn the

Mains ON/OFF switch to ON.

c The boiler is now ready to light automatically. If the timer is

set to an 'on' period and the room thermostat (if fitted) calls for

heat, the boiler will light and provide central heating.

If a hot water tap is opened the boiler will supply hot water.

IF OPTIONAL TIMER IS NOT FITTED:

a Ensure that the gas and water supplies are turned on, the

electricity supply to the boiler is off, the Mains ON/OFF switch

is set to OFF, any external controls (timer and / or room

thermostat) (if fitted) is/are set at the desired setting(s).

Set the central heating OFF / ON / TEMPERATURE

CONTROL to the desired temperature (normally maximum if a

room thermostat is fitted - unless radiators are likely to be

touched by children or elderly persons). If central heating is

not required and no timer is fitted, turn this control to the OFF

(0) position.

b Switch ON the electricity supply to the boiler and turn the

Mains ON/OFF switch to ON.

c The boiler is now ready to light automatically. If heating is

required and the room thermostat (if fitted) calls for heat, the

boiler will light and provide central heating.

If a hot water tap is opened the boiler will supply hot water.

NOTE:

(i) To provide increased efficiency when providing central

heating, the boiler control has a delay built in to prevent rapid

ON/OFF switching of the boiler thermostat. Also, when the

heating demand is satisfied, the pump continues to run for

approximately four minutes.

(ii) If the boiler fails to operate, check that the white pointer on

the pressure gauge is not below the red pointer. If necessary,

consult your installer or service engineer.

(iii) If the boiler still fails to operate, press the overheat re-set

button (fig 1) once.

TO TURN THE BOILER OFF

For short periods: Set the Mains ON/OFF switch to OFF.

To restart, simply set the Mains ON/OFF switch to ON.

For long periods: Set the Mains ON/OFF switch to OFF. If

frost is likely during the period of shutdown it is necessary to

leave the mains electricity and gas supplies ON. The inbuilt

boiler frost protection device will protect the boiler from frost

damage.

To restart, refer to the lighting instructions above.

NOTE: If it is desired to turn off the power and gas supply (e.g.

for a long absence) it is necessary to drain the system.

OPERATING THE OPTIONAL HEATING TIMER (IF

FinED)

The electronic timer display (24 hr clock) provides a

permanent display of the time of day and day of the week. If

the boiler is switched off or its power supply interrupted, a built

in battery will operate the display and protect the programme

of operating times etc.

DOMESTIC HOT WATER

TEMPERATURE CONTROL

MAINS ON/OFF DEMAND

MAINS ON LIGHT

LIGHT

PRIMARY WATER ".

PRESSURE GAUGE

OPTIONAL

CENTRAL HEATING

TIMER OVERHEAT RESET

sunON

CENTRAL HEATING

ON/OFF TEMPERATURE

CONTROL

The timer is supplied with a factory set default programme, but

this can be altered by the user. Refer to 'To set the electronic

timer' on page 4.

Operating mode switch (1 AUTO 0)

permanently on, this provides a continuous central

heating 'on' period, overriding any other programme. A (.~)

symbol appears in the display whenever the operating mode

switch is set to 1, to remind you that it is 'on'.

permanently 'off' - DHW only, no central heating.

AUTO

Timed.

Timer setting switch ( RUN)

Set the switch to C9and the time of day and day of t'he week

can be set using the HR, MIN and DAY buttons as described

below.

Set the switch to ® and the 'on' and 'off' times for the central

heating can be set as described below.

Set the switch to RUN and your preset programme will start.

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® button Use this button to select the switching modes when

setting your central heating periods. A .:~ symbol will appear

at the right hand side of the display when a 'switch on' mode is

selected, this will disappear when a 'switch off' mode is

selected. A number (1 to 16) also appears in the display next

to the symbol, this indicates the number of the switching

mode.

Up to 8 'on' and 8 'off' switching modes can be selected.

Note "

These must be selected in pairs with the same day or group of

days for each pair, ie 1st pair

1-on/2-off, 2nd pair

3-on/4-off

etc.

If the pairs are to be set for the whole week then all days must

be selected for each 'on' & 'off' pair as they are set.

DAY button Use this button to select the day of the week

when setting the timer. You also use this button to select

'groups' of days when setting your central heating periods. An

arrow is continuously visible on the display to indicate the day

of the week. When setting the operating times and choosing

the 'groups' of days, the arrows appear under each day in the

'group', these revert back to the single arrow under the day of

the week after setting the timer.

When using the day button, keep press/releasing it and the

arrow under the day of the week will advance through the

days, after the single days of the week the 'groups' of days will

appear. Five days (Monday to Friday), then weekends

(Saturday and Sunday), then six days (Monday to Saturday),

then all seven days. If the button is pressed again the arrow

disappears, press it again and it will reappear under Sunday.

If the button is kept pressed in, it will quickly advance through

the above sequence.

HR button Use this button to set the hours for the time of day

and the 'on', 'off' times. Keep the button pressed in to advance

the time rapidly, then press/release it for individual hrs.

MIN button Use this button to set the minutes, in the same

manner as the HR button previously described.

button Use this botton to select the Advance function

which will cause the timer to advance to the next 'on' or 'off'

period. The display will show either the

symbol when you

switch to 'off' during a programmed 'on' period or both the

and .:~symbols will show when you switch to 'on' during a

programmed 'off' period. The timer will return to the next

programmed 'on' or 'off' mode on completion.

R button Use this button to clear any previous programmes,

using the tip of a pencil. The display will reset to 0.00 and

Monday will be selected. The dispiay will flash until the timer

setting switch is set toe:>and the correct date/time entered

(see next section).

TO SET THE ELECTRONIC TIMER (SEE FIG. 2)

The timer is supplied with the following factory set default

times (available 7 days)

Program 1 On 06.30

Program 2 Off 08.30

Program 3 On 12.00

Program 4 Off 12.00

Program 5 On 16.30

Program 6 Off 22.30

Thesemaybe usedor thetimercan be re-programmedas:follows:

1) Press the R button to clear any previous programmes from

the memory. The display will reset and start to flash.

Set the time of day and day of the week as follows:

2(a) Set the timer setting switch to e:>and the display will stop

flashing. (b) Press the HR and MIN buttons to set the actual

57030

FIGURE 2 - TIMER

OPERATING

MODE SWITCH

DEMAND

INDICATOR

POSITION

OF DISPLAY

FEATURES

SEITING

BUITONS

time of day. (c) Press the DAY button to set the actual day of

the

week·;

The current time of day and day of the week are

now set in the timers memory.

Now the timer will operate to the inbuilt default programmes

which can be modified.

3) Set the 'switch on' and 'switch off' times for your central

heating periods and the group of days of the week in which

you wish them to operate as follows:

(a) Set the timer setting switch to ®. The display changes to

6:30 with the first switching mode ready to be set, .:~ (the

symbol will appear in the display to indicate that you are

setting a 'switch on' mode. A number 1 will also appear to

indicate that it is the first switching mode). (b) Keep pressing

the DAY button until the required day (or group of days) is

selected. (c) Press the HR and MIN buttons to set the actual

time for the beginning of the first heating period.

(d) Press the ® button again to set the second switching

mode (the.~ symbol will disappear from the display to indicate

that you are setting a 'switch off' mode. A number 2 will also

appear to indicate that it is the second switching mode). (e)

Keep pressing the DAY button until the required day (or group

of days) is selected. (f) Press the HR and MIN buttons to set

the actual time for the end of the first heating period. (g)

Operations (d) to (f) can be repeated to give you up to eight

: heating periods in the selected group of days. You do not need

'" to use all of the switching modes.

Cl)

IMPORTANT: You must use the DAY button to select the

required day (or groups of days) for each on/off period before

setting the time for each on/off period.

4) With the timer setting switch still at ®, continue pressing

the ® button to check your settings. Ensure that you have set

a switch off mode after each switch on mode and that the

times do not overlap. Set the timer setting switch to RUN and

the operating mode switch to AUTO. The timer will now

automatically control the boiler to provide central heating

during the operating periods you have just set. The .:~symbol

will appear in the display whenever the timer is operating

during an 'on' period.

GENERAL NOTES AND CARE OFYOUR

SYSTEM (FIGURE 1)

Mains ON/OFF switch. (Figure 1) This switch turns the boiler

on and off. The green light near the switch indicates it is in the

on position.

On/Off/Central heating temperature control. (Figure..1)

This control allows the temperature of the water leaving the

boiler for the heating system to be adjusted. Turning it

clockwise increases the temperature. Turning it fully anti-

clockwise turns the central heating off.

Domestic hot water temperature control. (Figure 1) This

control allows the temperature of the water leaving the boiler

57030

for the hot taps to be adjusted. Turning it clockwise increases

the temperaJure.

Pressure gauge This indicates the central heating system

pressure. The red pointer will have been set by your Installer

and must not be moved. The white pointer indicates the actual

pressure, which will increase as the system warms up. Do not

operate the boiler if the pressure falls below 0.5 bar. If this

happens, contact your Service Engineer to have the system

re-pressurised.

Overheat Lockout reset button If there is a burner control

malfunction, or an interruption in the power supply, the

overheat thermostat will switch the boiler off and the red

lockout neon will light. If the boiler continually goes to 'lockout'

a fault exists and you will need to call your Service Engineer.

Safety valve The boiler is fitted with a safety valve to release

excess pressure from the system if it overheats. If water or

steam is discharged from the end of the pipe, switch off the

boiler and contact your Service Engineer.

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.

Central heating system

The boiler is fitted with an automatic air vent which removes

air from the system as it leaves the boiler. Any air trapped in

the radiators needs removing by venting the radiators using

the vent screw at the top of the radiators. Only vent a radiator

if the top is cool and the bottom is hot. Excessive venting will

reduce the system pressure, so only vent when necessary and

check the system pressure as mentioned above.

Note: Your sealed system may incorporate a 'Top Up' vessel,

advice on how to use it should be obtained from your Installer.

Domestic hot water system.

The flow of water from the taps (hot or cold) depends upon the

mains water pressure, and in some homes it may not be

possible to use a number of taps at the same time.

The temperature of water leaving a hot tap depends on a lot of

variables, such as mains pressure, distance of the tap from

the boiler and the flow rate of the water leaving the tap. It may

take some time and experimenting with the temperature

control (see below) and how far you open a tap to achieve the

results you require. Remember, if you open a hot tap fully it

may not supply water at such a high temperature as when you

only open it half way.

The temperature of the hot water leaving the boiler for the hot

taps can be increased by turning the hot water temperature

control knob (see Fig. 1) clockwise.

ROUTINE SERVICING

To ensure the continued efficient and safe operation of the

GlIPpliance,it is recommended that servicing is canrJed·outat

regular intervalS, the frequency of which will vary, depending

on the installation conditions and usage. Service inspection

once a year is recommended.

Servicing must be completed by a competent (CORGI

registered) person.

CLEANING

To clean the appliance casing use a damp cloth and a little

detergent. Do not use an abrasive cleaner.

5"7030

SPARE PARTS AND SERVICE

All Centurion products are covered by a 12 month Warranty

and a nationwide network of Service Engineers.

In the unlikely event of a breakdown, please contact

Centurion on (01473) 747472, or alternatively your installation

or servicing company.

To help us provide you with a fast and efficient service,

please quote the boiler number and G.C. number. This can

be found on the label on the inside of the control panel door.

57030

Indicates changes from

previous issue

CENTURION GAS PRODUCTS LTD

PO Box 323, Ipswich IP1 5JB Tel: 01473747472 Fax: 01473747479

Centurion Gas Products policy is one of continuous research and development.

This may necessitate alterations to this specification.

Centurion WM 2.5 User Instructions

Brand: Centurion

Model: WM 2.5

Category: Thermostats

Type: User Instructions

This manual is also suitable for

WM 3.5

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Centurion WM 2.5 User Instructions

This manual is also suitable for

Centurion WM 2.5 User Instructions

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