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55

©  Halstead Boilers Ltd 2008

2.0

2.0

2.0

2.0

2.0 Getting started

Getting started

Getting started

Getting started

Getting started

2.1

2.1

2.1

2.1

2.1

Before switching on

Before switching on

Before switching on

Before switching on

Before switching on

Before switching the appliance on please familiarise your-

self with:

how to isolate the appliance from the gas, water, and

electricity supplies;

how to check and top-up – if necessary – the system

water pressure;

the time clock or programmer;

any external thermostats and their functions;

the appliance controls.

2.2

2.2

2.2

2.2

2.2

Appliance controls (see fig. 1)

Appliance controls (see fig. 1)

Appliance controls (see fig. 1)

Appliance controls (see fig. 1)

Appliance controls (see fig. 1)

The appliance controls are situated on the lower front of

the appliance. The appliance controls include:

pressure gauge;

appliance mode selector;

temperature selector;

2-digit LED display;

burner ON mode (green);

fault indicator (red);

optional - integral time clock/programmer (if fitted).

The     pressure gauge     shows the current pressure of your

heating system, the gauge should be set between 1 and 1.5

BAR. When the appliance is operating the gauge may rise or

fall slightly, this is quite normal. The minimum permissible

level for the safe and efficient operation of the appliance is

0.5 BAR. Should the pressure fall below  0.5 BAR, the boiler

may lockout.
The appliance mode selector is used to switch the boiler to

the various operating modes:

OFF/RESET “ 

  ”

DHW MODE  ”

 ”

CH MODE “ 

 ”

CH with PREHEATING MODE “ 

  ”

N O

N O

N O

N O

N O TTTTTEEEEE

The appliance frost protection is active in all of the above

modes.
The  temperature selectors

temperature selectors

temperature selectors

temperature selectors

temperature selectors can be used to vary the

temperature of the water that circulates around your

radiators and the water that flows from your hot water

taps.  The temperature range is adjustable between 40

o

C

and 80

o

C for the central heating, and between 35

o

C and

60

o

C for the hot water. Moreover if floor heating mode is

selected (by using the relative jumper), the temperature

range for CH mode can be modified between 20°C and 45°C.
The  2-digit

2-digit

2-digit

2-digit

2-digit  L

  L

  L

  L

  LED di

ED di

ED di

ED di

ED displ

spl

spl

spl

splay nor

ay nor

ay nor

ay nor

ay normally 

mally 

mally 

mally 

mally shows the operating

temperature of the appliance, however it can also display

additional characters or flashing numbers to signify specific

operating modes or fault codes.
When the status indicator (Green) is lit

status indicator (Green) is lit

status indicator (Green) is lit

status indicator (Green) is lit

status indicator (Green) is lit it indicates

that the flame is present and the burner is ON.

When the fault indicator (Red) is lit

fault indicator (Red) is lit

fault indicator (Red) is lit

fault indicator (Red) is lit

fault indicator (Red) is lit it indicates that

the appliance has identified a possible fault and performed

a safety lockout.

The  integral time clock (when fitted)

integral time clock (when fitted)

integral time clock (when fitted)

integral time clock (when fitted)

integral time clock (when fitted) can be used to

switch the heating on and off at pre-determined intervals.

The  integral time clock or programmer (when fitted)

integral time clock or programmer (when fitted)

integral time clock or programmer (when fitted)

integral time clock or programmer (when fitted)

integral time clock or programmer (when fitted)

can be used to switch the heating and/or hot water on and
off at pre-determined intervals.

 2.3 

 2.3 

 2.3 

 2.3 

 2.3 

 Lighting the boiler

 Lighting the boiler

 Lighting the boiler

 Lighting the boiler

 Lighting the boiler

Ensure the gas and electrical supply to the boiler are

Ensure the gas and electrical supply to the boiler are

Ensure the gas and electrical supply to the boiler are

Ensure the gas and electrical supply to the boiler are

Ensure the gas and electrical supply to the boiler are
turned on.

turned on.

turned on.

turned on.

turned on.

Turn the mode selector switch to the ON

ON

ON

ON

ON position.  When

there is a request for heating or hot water via the time clock
or programmer, the boiler will begin an ignition sequence.
When the appliance reaches the set temperature, the burner
will go off for a minimum period of approximately 3 minutes.

When the programmer/time clock or external thermostats
heating request has been satisfied, the appliance will switch
off automatically.

 2.4 

 2.4 

 2.4 

 2.4 

 2.4 

 Adjusting the heating temperature

 Adjusting the heating temperature

 Adjusting the heating temperature

 Adjusting the heating temperature

 Adjusting the heating temperature

Rotate the temperature selector – clockwise to increase,
counter-clockwise to decrease – to the desired temperature
setting.  The temperature can be set from a minimum of 40

O

C

to a maximum of 80

O

C (if standard CH mode is selected).

 2.5

 2.5

 2.5

 2.5

 2.5

  Adjusting the hot water temperature

  Adjusting the hot water temperature

  Adjusting the hot water temperature

  Adjusting the hot water temperature

  Adjusting the hot water temperature

Rotate the temperature selector – clockwise to increase,
counter-clockwise to decrease – to the desired temperature
setting.  The temperature can be set from a minimum of 35

O

C

to a maximum of 60

O

C. If the temperature at the outlet is still

not sufficiently hot enough, it may be necessary to reduce
the flow of water at the hot water outlet (tap).

N O

N O

N O

N O

N O TTTTT EEEEE
If the appliance fails to ignite during the ignition sequence,
it will enter a lockout condition.  Should this occur, please
allow a period of at least two minutes before re-setting the
appliance.

Summary of Contents for iHeat 25c

Page 1: ...rs Ltd 2008 These instructions should be left with the user User Instructions iHeat 25c iHeat 30c iHeat 35c Combination Condensing Boilers G C NUMBER iHeat 25c N 47 260 16 iHeat 30c N 47 260 17 iHeat...

Page 2: ...duction Introduction Introduction Page Page Page Page Page Dear customer 2 Do s and don t s 2 Things you should know Things you should know Things you should know Things you should know Things you sho...

Page 3: ...with your boiler the supply of gas to the burner will be terminated automatically 1 8 1 8 1 8 1 8 1 8 Frost protection system Frost protection system Frost protection system Frost protection system F...

Page 4: ...switch fig 1 fig 1 fig 1 fig 1 fig 1 5 3 6 4 1 2 7 8 1 10 1 10 1 10 1 10 1 10 Digital display Digital display Digital display Digital display Digital display The 2 digit digital display will normally...

Page 5: ...r is ON When the fault indicator Red is lit fault indicator Red is lit fault indicator Red is lit fault indicator Red is lit fault indicator Red is lit it indicates that the appliance has identified a...

Page 6: ...g the system Close the filling valve when the pressure gauge on the boiler reads between 1 and 1 5 BAR Remove the filling loop from the connections 3 2 3 2 3 2 3 2 3 2 How to reset the appliance How t...

Page 7: ...ularly requires topping up or re pressu rising it may be indicative of a leak Please contact your installer and ask him to inspect the system 4 3 4 3 4 3 4 3 4 3 The fault light is on The fault light...

Page 8: ...this warranty Evidence of cleansing should be presented to our engineer upon request 6 Based on a typical boiler lifespan Halstead deem the life of a boiler to be 10 years from the date of installatio...

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