Ravenheat HE 25 S COMPACT, HE 30 S COMPACT Instructions For Use Installation And Servicing

Technical and illustrative data are not binding and can be modifi ed without prior notice.
The descriptions and illustrations in the present booklet are for guidance purposes only.

RAVENHEAT MANUFACTURING LTD
CHARTISTS WAY, MORLEY, LEEDS, U.K. LS27 9ET
TEL.: [phone] - FAX: [phone]

Website: www.ravenheat.co.uk - E-mail: [e-mail]

Instructions for Use

Installation and Servicing

To be left with the user

HE 25 S COMPACT

Natural Gas (G20) II

2H3P

LPG (G31) II

2H3P

HE 30 S COMPACT

Natural Gas (G20) II

2H3P

LPG (G31) II

2H3P

1312

HIGH EFFICIENCY

CONDENSING

COMBINATION BOILER

2

3

HIGH

EFFICIENCY CONDENSING BOILER

FOR CENTRAL HEATING AND DOMESTIC HOT WATER

This new highly effi cient turbo-modulating boiler is designed to meet domestic hot water and central heating requirements at
super high effi ciency.

POSITION

The appliance is extremely versatile as it can be fi tted in almost any room. The appliance is room sealed so there is no contact

between the combustion chamber and living accommodation. This guarantees maximum safety and effi ciency. Each boiler
has been designed and manufactured in our modern plant to exacting ISO 9001 discipline, all boilers carry full CE marking of
approval. Technical sales and commercial services are available throughout the UK Mainland. This product is guaranteed by
Ravenheat manufacturing ltd, Chartists Way, Morley, LEEDS, LS27 9ET. Telephone No [phone].

Guarantee is a full 12 months from date of purchase providing the appliance has been fi tted in accordance with these instructions

and relevant codes of practice.

- Modulating

gas valve.

- Modulating pump head suitable for any type of central heating system.

- Burner with fl ame stabiliser designed to operate under all thermal conditions.

- Unique condensing heat exchanger for high thermal fl ue transfer from gases to water.

- Stainless steel plate heat exchanger for super high heat transfer to domestic hot water supply.

- Built in frost protection.

- Printed circuit board designed to connect to room stat and/or timer.

- Aesthetically pleasing panels and controls.

- On/Off ball valves for shutting off gas, central heating and domestic hot water circuit.

- Safety relief valve (for safety discharge).

- Programmable 7 day module with digital display (time clock version only).

NOTE: Due to the high effi ciency of this boiler a plume of water vapour will form at the fl ue

terminal during operation.

COSHH - CONTROL OF SUBSTANCES

HAZARDOUS TO HEALTH

IMPORTANT

It is the Users/Installers responsibility to ensure that the necessary personal protective clothing is worn when
handling this appliance, and where applicable the pertinent parts that contain any materials that could be interpreted
as being injurious to health and safety.

GENERAL INFORMATION:
GLUES AND SEALANTS - exercise caution - if these are still in liquid form.
RAVENHEAT use only high quality material for production of this product, in an eff ort to protect the environment
wherever possible components should be recycled.

WARNING: when installing the appliance, care should be taken to avoid any possibility of injury when handling sheet
metal parts.

MAJOR COMPONENTS

4

5

6

It is the law that all gas appliances are installed by
a competent person, in accordance with the gas
safety installation and to the current Gas Safety
(Installation and Use) Regulations B.S.5440:2-(2009).

All registered installers carry a Gas Safe Register ID card
and have a registration number. Both should be recorded in
your boiler Log book. You can check your installer’s
registration at www.gassaferegister.co.uk.

ESCAPE OF GAS

Should a gas leak be suspected, contact your gas
supplier without delay.

GAS EMERGENCY NUMBER: 0800111999

Do NOT search for gas leaks with a naked fl ame.

WARNING: This appliance must be earthed.

1.1 INTRODUCTION

Please carefully read the information given in this
booklet to help you gain maximum control from your
appliance with minimum trouble and cost.

Your Ravenheat Condensing Low Nox combination boiler
has been designed to supply your Central Heating and
Domestic Hot Water directly from one unit.
When Central Heating is operating, the circulation will be
interrupted when Domestic Hot Water is being drawn off
(domestic hot water has priority).
This will normally not aff ect the level of Heating.

PLEASE NOTE:

Due to the high effi ciency of this appliance and resulting

low fl ue gas exhaust temperature a white plume of
condensation vapour (cool steam) will be emitted from the
fl ue outlet terminal, this is quite normal. It will be
particularly evident during periods of low outdoor
temperature or when the boiler is working at its optimum
performance (Plume Management kits are available on
request).

IMPORTANT:
In the unlikely event of the exhaust fl ue gases exceeding

the overheat temperature setting, the boiler operation will
be stopped to prevent damage to the appliance.

1.2 CLEARANCES AROUND THE APPLIANCE

Side clearance:

The position of the appliance must provide a
minimum clearance of only 5 mm as the side panels
do not require removing for servicing.

However, if the option is preferred to remove the
panels then a minimum clearance of 55 mm is
required.

Top clearance:

The top clearance should be a minimum of
125 mm.

Bottom clearance:
A minimum bottom clearance of 80 mm is

required between the appliance and any surface,
though 150 mm is preferred whenever
possible.

Front clearance:
A minimum of 450 mm is required in front of
the appliance for access during servicing, the
front clearance can be reduced when installed
in a cupboard to 25 mm from the access door.

USER CONTROLS

This appliance is designed to operate with the minimum
of ease for the user. All the controls are found on the
control panel on the front of the boiler.

1.3 OPERATING SAFETY CHECKS TO PROTECT
YOUR APPLIANCE (CHECKING THE SYSTEM
PRESSURE)

Before lighting the appliance check that the Central
Heating system pressure is not less than 1 bar. If it
is below this it will be necessary to re-pressurise the
system, between 1 and 1.5 bar to allow the boiler to
operate. To view the system pressure press the INFO
button once, this will display the current pressure (if the

pressure is on nil or too low, then error code 08E is
displayed).

A fi lling device (fi lling loop) will have been fi tted on the
system.
This is usually on the pipework near to the boiler. If you
are unsure of its position, or you cannot identify it, consult
the installer who fi tted the boiler.
The fi lling loop usually consists of two taps and a
separate silver coloured braided fl exible pipe with
connection fi ttings. Only when re-pressurising should the
braided fl exible pipe be connected between the two taps,
ensure that the nuts or the pipe ends are tightened
onto the taps.
Fully open one of the taps fi rst and then while monitoring
the water pressure on the digital display, carefully open
the second tap. When the water pressure is to a
maximum of 1.5 bar turn both taps off .
Disconnect the fl exible pipe from the taps (a small
amount of water may be present).
Keep the pipe in a safe place for future use.
Press the ESC button once to return to the main screen.

In the event of an error, the appliance will show a
sequence code displayed on the digital display of the
control panel (fi g. 1). By pressing the “RESET“
button it is possible to relight the boiler (see page 52
and 53 for list of error codes).

1 USERS GUIDE

7

1.4 APPLIANCE STATUS INDICATORS

The boiler is equipped with a large LCD
display that indicates the appliance
operating status fi g. 1).

Fig. 1

KEY:

1 - ON/OFF button.
Press to turn the boiler ON, summer mode
(hot water symbol only), winter mode (hot
water and radiator symbol), and OFF.
Press the button also to confi rm selections.

2 - Press to RESET the appliance if ever an error
code is displayed or ESC to back-up from the
boiler menus.

3/4 - Temperature and function mode selectors.
Press the arrow up or the arrow down to
increase or decrease the heating or domestic
hot water outlet temperature, when the digital
display is in hot water or central heating
set-point temperature.
Press also to show the boiler values or to
show the options program when the digital
display is in INFO or in USER PARAMETERS.

5 - Press to set the Central Heating

Temperature required
Press once to view the central heating

temperature set-point (boiler must be in winter
mode).
Press the arrow up or the arrow down buttons
to increase or decrease the temperature.

5 - Press to set the Domestic Hot Water

Temperature required.
Press twice (once if in summer mode)

to see the domestic hot water temperature
set-point.
Press the arrow up or the arrow down buttons
to increase or decrease the temperature.

6 - INFO: press to show the boiler values.

- water pressure

- fl ow temperature (CHF).

- return temperature (CHR).

- domestic hot water temperature (DHW).

- % power of modulation.

- fan speed (FAN), the display show 2 digits
(e.g. 20 = 2000 rpm).

- external temperature, if the external
probe is present (OTC).

- error history.

- error history.

- error history.

- error history.

- error history.

Press ESC to esc INFO mode.

- USER PARAMETERS (for service people): press
the INFO and the arrow down buttons together for
5 seconds to show the boiler parameters (buttons
4 and 6).

- P001: C.H. max fan speed.

- P002: D.H.W. max fan speed.

- P003: Keep hot “0” disabled and “1” enabled

- P004: C.H. High/Low temperature:
“0” low (max 50°C) / “1” high (max80°C)

- P005: Climatic curve: default “20” (full instructions
are provided with the Outdoor Sensor Kit).

- P006: Enable locking pump “0” disable / “1”
enable.

- P007: Test mode: “0” disabled, “1” enable.
(the function is enable for maximum 15
minutes).
Press ESC to esc Test mode.

- P008: Weather compensator control.
0= Normal remote control.
1= Ravenheat remote control with
D.H.W. selection in boiler.
2= Honeywell remote control.

- P009: Ignition power. Is possible to set the soft
start power level (% of max boiler power,
range 0:99).

- P010: Boiler power selection
(“1” HE 80 S - “2” HE 98 S).

- P011: Boiler type
(“1” istantaneous - “2” only heating). -

- P012: Gas type
(“0” Natural gas - “1” LPG gas).

- P013: Modulating pump type selection
(“0” Wilo - “1” Grundfos).

- P014: Water pressure sensor selection:
“0” pressure switch - “1” transducer

Press ESC to esc USER PARAMETERS mode.

7 - TIMER MODE (time clock version only).
Press to select “Auto” (heating times set),
“Manual” (heating on all the time) and off
(heating off ).

It is possible to set the time and the current day
(Monday 1, Tuesday 2, Wednesday 3, Thursday 4,
Friday 5, Saturday 6, Sunday 7), see section 1.7.

8

1.6 BOILER VALUE

It is possible to show the boiler value.
Press INFO button (item 6 fi g. 1) to show the
boiler values.

Use the arrow up and the arrow down
buttons, (item 3 and 4 fi g. 1) to show the
following info:

water pressure
fl ow temperature (CHF)
return temperature (CHR)
domestic hot water temperature (DHW)
% power of modulation
fan speed (FAN)
external temperature, if the external
probe is present (OTC)
error history
error history
error history
error history
error history

1.7 TIME (time clock version only)

SETTING THE TIME AND DAY

(time clock

version only):

1. Press and hold for 5 seconds the TIMER
MODE button (item 7 fi g. 1).
The hour value will fl ash.

2. Press the up and down arrow buttons (item
3 and 4 fi g. 1) to select the current hour
(24h). Then press the ENTER button
(item 1 fi g. 1) to begin to fl ash on the display
confi rm after this the minutes will fl ash.

3. Press the up and down arrow buttons
(item 3 and 4 fi g. 1) to select the current
minutes and then press the ENTER button
(item 1 fi g. 1) to confi rm, after this the day
indicator will begin to fl ash on the display.

4. Press the up and down arrow buttons (item
3 and 4 fi g. 1) to select the current day
(1=Mon, 2= Tue etc.) and then press the
ENTER button to confi rm.
The time is now set, press ESC button (item
2 fi g. 1) to esc time function.

KEY

1 - Day indicator:

(time clock version only)

1. Monday

2. Tuesday

3. Wednesday

4. Thursday

5. Friday

6. Saturday

7. Sunday
2 - Water temperature.
3 - Modulation fl ame level: When the burner is lit,
3 diff erent levels on icon 3 are displayed.
4 - Anomaly - Lock out.

5 - Manual: When the digital timer is set to
manual icon 5 is displayed, in this mode the
central heating is on permanently.

1.5 DIGITAL DISPLAY

Fig. 2

6 - Central Heating: when the appliance
is in central heating mode icon 6 will fl ash.
7 - Current time.
8 - Off (time clock version only): when the digital
clock is in off function icon 8 is displayed.
9 - Auto (time clock version only): when the
digital clock is in automatic function icon 9
is displayed.
10 - Domestic hot water: when the appliance is in
domestic hot water mode the icon 10 will fl ash.
11 - Test function.
12 - Water pressure: shows the current pressure in
the system or day settins in timer mode.

1.8 PROGRAMMING THE HEATING TIMES
(time clock version only)

The appliance incorporates a digital clock
programmed with a default heating pattern (see
table 1); however this can be modifi ed to suit
individual needs.

To change the programmed times:

1. Press and hold the timer mode button (item 7
fi g. 1).
The dispaly shows the current time, set the
time if necessary.

2. Press and hold for 5 secons the timer mode
button (item 7 fi g. 1) again for another 5
seconds.
The display shows the fi rst heating period on
the fi rst day.

3. Press the up and down arrows (item 3 and 4
fi g. 1) to select the On1 time (fi rst on time)
and press the ENTER button (item 2 fi g. 1).

5. Press the up and down arrows to set the
Off 1 time (fi rst off ) and press ENTER button
(item 2 fi g. 1).

Repeat this process for the remaining 3
settings.

Note: if not all 4 times are required
then set the remaining on and off times with
the same hours, the display will show “------”.
This cancels the remaining on and off .
For example see the weekend settings in
table 1.

Once the times are set, press the ESC button
(item 2 fi g. 1).and this will return to the main
screen.

TABLE 1

9

NB: If setting the times in a group, the days in
the group will all be the same, however days
not in this group will remain at the default time.

For example, setting Mon-Sat will change all
these days but Sunday will remain the same
as table 1 unless changed individually.

If you wish to override these times, press
the timer mode button to select manual (Fig.2
icon 5), this puts the boiler in manual mode
which overrides the timer on the boiler so the
heating is on permanently (providing any
external controls fi tted are calling for heat).
To turn the heating off , press the timer mode
button to select off , this will now turn the heating
off permanently until either auto or manual is
selected.

To copy the days:

1. In programming time, press the up and down
arrows (item 3 and 4 fi g. 1) to select the day
to be copied.

2. Press INFO (item 6 fi g. 1) and arrow up (item
3 fi g. 1) buttons together to copy, the display
shows “COPY SRC”.

3. Press the up and down arrow (item 3 and 4
fi g. 1) to select the day that you want to
change.

4. Press and hold the INFO (item 6 fi g. 1) and
arrow down (item 4 fi g. 1) buttons together for
5 seconds to paste the settings, the display
shows “COPY DST”.

1.9 DIAGNOSTIC

The display shows eventual error or faulty
message.

Stop boiler: The boiler stops the operating cycle
and waits for the disappearance of the cause of
the error in order to go back to be operating
mode.

Block boiler: the boiler requires a manual reset
to become operational again.

10

2.0 GENERAL LAYOUT (Fig. 3)

Fig. 3

KEY

1 - C.H. fl ow
2 - D.H.W. outlet
3 - Gas inlet
4 - D.H.W. fl ow detector

5 - Water inlet
6 - C.H. return
7 - Drain point
8 - Pump
9 - Safety pressure relief valv
10 - Water pressure
11 - Automatic air vent

12 - C.H. return sensor
13 - Fan
14 - Expansion vessel
15 - Spark electrode
16 - Flue temperature sensor
17 - Main heat exchanger
18 - Sensing electrode
19 - Condensate drain
20 - Overheat cut off thermostat
21 - C.H. flow sensor

22 - Silencer
23 - Condensate trap
24 - Plate heat exchanger
25 - Gas valve

11

KEY

1 - Flue temperature sensor
2 - Main heat exchanger
3 - Sensing electrode
4 - Spark electrode
5 - CH return
6 - CH fl ow
7 - Condensate drain
8 - Fan
9 - CH return sensor

10 - Overheat cut off thermostat
11 - CH fl ow sensor
12 - Gas valve

13 - Expansion vessel
14 - Automatic air vent
15 - Pump
16 - Water pressure transducer
17 - Safety pressure system
18 - Diverter valve motor

19 - Plate heat exchanger
20 - DHW sensor
21 - DHW fl ow sensor
22 - Gas service cock
23 - CH compression ball valve
24 - DHW compression ball valve
25 - CH compression ball valve

2.1 OPERATING SCHEME (Fig. 4)

Fig. 4

When starting, the fan will always start at the

set-point speed.

The boiler is fi tted with an anti-cycling device

on the control board. This delays the boiler

from re-fi ring within 10 minutes.
If the heating temperature goes 20 °C below
the set point, the burner restarts immediately.
The domestic hot water will always take

priority and is unaff ected by the anti-cycling

device.

2.6 GENERAL FUNCTION

The instrument panel allows adjustment of the

boiler to the heating requirements, between

the maximum and minimum settings.

Air and gas are drawn by the fan for
combustion. The fan also forces exhaust gas

through the fl ue to the outside, this creates

a lesser pressure in the sealed combustion

chamber, thus sucking in combustion air,

through the inlet duct.

The boiler water temperature is automatically

controlled by a built in thermostat.

Interior space temperature is set by the

room thermostat to be installed as part of the

heating system. The boiler already carries

connection terminals for this thermostat, as

well as for an external timer if required. The

burner continues to operate until it is stopped

by the digital clock or one of the thermostats.

When the internal CH temperature sensor
or the room thermostat intervenes the burner

shuts down. The fan stops but the pump

continues to operate for 3 minutes.

The boiler also incorporates an anti-block

system which powers the pump every 24

hours, allowing it to operate for 2 minutes if

the boiler has not been in use. This operation

may in some cases be heard for a short

period when the pump has been activated.

The heat exchanger in the DHW circuit is
a stainless steel plate heat exchanger water

to water, and domestic water is heated by

converting the water in the central heating

circuit. The transfer of heat is very high

because the two fl uids move in a counter

direction.

Select the winter position by pressing the

ON/OFF button (item 1 fi g. 1).
When a hot water tap is turned on the
diverter valve motor moves to exclude the
central heating circuit, the boiler
automatically modulates to maintain
the domestic hot water at a constant

temperature.
The water temperature can be regulated by

the digital display.

2.2 INTRODUCTION

This boiler is designed for the production of

central heating and domestic hot water
combined in one unit.
It is fi tted with an automatic domestic hot

water priority valve.

It is possible to select either a summer or

winter function with the summer position
only being for domestic hot water.

The winter position being for central heating

with domestic hot water priority.

2.3 DESCRIPTION OF CONTROL SYSTEM
AND SEQUENCE OF OPERATION

2.4 Domestic hot water mode

When the appliance is in rest mode, select

the summer position by pressing the ON/OFF
button (item 1 fi g. 1) please ensure that the
heating circuit is charged with water (above 1
bar).

If the domestic hot water tap is turned on, the

boiler will function in the following sequence:

The pump starts. The fan starts and sends a
signal back to the ignition board that the fan is
running.

The spark ignition system is powered which in

turn commences the spark igniter to operate
and light the burner.

At this point the ignition board opens the gas

valve to light the burner.

When the electrode sensor senses the signal

that the burner is alight, the spark igniter
stops.

The fan speed settings on the boiler increases

to the maximum permissible speed over
a period of 5 seconds and will remain at its
maximum required power until its maximum
regulated temperature is achieved and then
will modulate to maintain this.

When the domestic hot water tap is closed the

diverter valve goes back into rest mode, the
burner is shut down along with the fan which is
also switched off .

2.5 Central heating mode

If the appliance is in winter mode with a

demand for heat to supply radiators, etc. ,
with the heating circuit fully charged above
1 bar, so as to operate the low water sensor
device the boiler will start in the same way
as domestic hot water mode.

As the heating sensor reaches temperature

the fan speed modulates to maintain the
temperature set on the display panel.

12

13

When there is a demand for domestic hot
water, the burner and pump perform as
they do during central heating except that
the burner is commanded by the DHW
thermostat.

When DHW is no longer called for (tap is

turned off ), the boiler will automatically return
to the central heating mode.

Select the summer position by pressing the

summer/winter button. The boiler functions
like an automatic gas hot water heater.
When DHW is no longer required the burner

and pump and fan will immediately turn off .
This also takes place when in winter mode,
if there is no demand for heat to the central
heating system or until the digital clock and
room thermostat (if fi tted) demands the
central heating circuit.

2.8 SAFETY DEVICE

In both central heating and domestic hot

water mode safe operation is ensured by a

control board which shuts off the main

burner, if the fan stops or the fl ue or
combustion air intake duct is obstructed.

An overheat cut off thermostat acts to turn

off the burner to resettable “lockout”.
A safety valve is fi tted on the central heating

circuit set at 3 bar.
A low water pressure switch set at 0.4 bar is

fi tted on heating circuit, to prevent the boiler

operating below this boiler system pressure.

2.7 OVERALL DIMENSION
(Fig. 5)

2.9 AVAILABLE PUMP HEAD

Fig. 5

14

Nominal heat Input net QMS 21.0 kW
Minimum heat Input net 3.7 kW

Nominal heat output 20.4 kW
Nominal heat output condensing 22.1 kW
Minimum heat output 3.5 kW
Minimum heat output condensing 3.9 kW

Inlet pressure 20 mbar Gas rate after 10 minutes Max 2.1 m3/h - min. 0.4 m3/h

Fan speed Max 5200 rpm - 173 Hz Combustion % CO2 : 9.0 (+ 0.5 / - 0.5) Case On 9.0 (+ 0.5 / - 0.5) Case Off
C.H. min 1200 rpm - 40 Hz Combustion % CO2 : 8.5 (+ 0.5 / - 0.5) Case On 8.5 (+ 0.5 / - 0.5) Case Off

Electrical supply: 230 V ~ 50 Hz
External fuse rating: 3 A Internal fuse F1: 3.15 A (20 mm To BS 4265)

Dry weight : 31 Kg Water content C.H.: 0.8 Litre Water content D.H.W.: 0.2 Litre

Gas Supply Connection 15 mm compression isolating valve
Flow connection C.H. 22 mm compression isolating valve
Return connection C.H. 22 mm compression isolating valve
Inlet connection D.H.W. 15 mm compression isolating valve
Outlet connection D.H.W. 15 mm compression valve
Safety discharge C.H. 15 mm copper pipe
Condensation drain 3/4” (21.5 mm) push fi t over fl ow

Max cold water capacity without additional expansion vessel 110 Litre

Sealed water system C.H.
Max pressure PHS 2.5 bar
Minimum working pressure 0.5 bar
7 Litres expansion vessel pre-charge-pressure 0.5 bar

Central Heating operating temperature Max 80 °C min 35 °C
Design fl ow rate 1066 I/h 20 °C rise

Minimum fl ow rate C.H. 350 l/h
D.H.W. fl ow rate 30 °C rise 11.9 l/min

D.H.W. fl ow rate 35 °C rise 10.2 l/min
D.H.W. fl ow rate 40 °C rise 8.9 l/min 10°C Inlet temperature

D.H.W. temperature Max 60 °C min 35 °C

Fan speed D.H.W. Max 6200 rpm - 207 Hz min 1200 rpm - 40 Hz
Qmw Input Net Max 25.5 kW min 3.7 kW

D.H.W. Pressure Pmw Max 6.5 bar
D.H.W. Pressure Pmw min 0.5 bar
D.H.W. Minimum Flow Rate 2.5 I/min

Flue outlet nom. diameter 100 mm specially supplied with boilers (If required)

Destination: GB, IE Category: II2H3P

Flue Type: C13 - C33 - C53 SEDBUK A Electrical protection index: IP X4 D

LWA sound power level, indoors 50.5 dB NOx class 5 - 24.40 mg/kWh

ErP D.H.W.

Seasonal space heating energy effi ciency class Water heating energy effi ciency class

µs seasonal space heating energy effi ciency 91.7 % Load Profi le XL
Pn nominal heat input 21.0 kW µwh water heating energy effi ciency 85.1 %
P4 nominal heat output high temperature 20.4 kW Qfuel daily fuel consumption 22.774 kWh
P1 nominal heat output (30% Pn) low temperature 6.1 kW AFC Annual fuel consumption 17.284 GJ
Qelec daily electricity consumption 0.2046 kWh
AEC annual electricity consumption 44.802 kWh

µ4 effi ciency at nominal heat output high temperature 87.3 %
µ1 effi ciency at 30% nominal heat output low temperature 97.0 %

Auxiliary electricity consumption:

elmax at full load 0.034 kW PSB in standby mode 0.005 kW
elmin at part load 0.016 kW Pstby standby heat loss 0.028 kW

3 TECHNICAL DATA

HE 25 S Compact

TABLE 2/A

NATURAL GAS (G 20) П2H3P

15

3.1 TECHNICAL DATA

HE 25 S Compact

TABLE 2/B

LPG ( G 31) П2H3P

Nominal heat Input net QMS 21.0 kW
Minimum heat Input net 3.7 kW

Nominal heat output 20.4 kW
Nominal heat output condensing 22.1 kW
Minimum heat output 3.5 kW
Minimum heat output condensing 3.9 kW

Inlet pressure 37 mbar Gas rate after 10 minutes Max 2.1 m3/h - min. 0.4 m3/h

Fan speed Max 5000 rpm - 167 Hz Combustion % CO2 : 10.5 (+ 0.5 / - 0.5) Case On 10.5 (+ 0.5 / - 0.5) Case Off
C.H. min 1200 rpm - 40 Hz Combustion % CO2 : 10.0 (+ 0.5 / - 0.5) Case On 10.0 (+ 0.5 / - 0.5) Case Off

Electrical supply: 230 V ~ 50 Hz
External fuse rating: 3 A Internal fuse F1: 3.15 A (20 mm To BS 4265)

Dry weight : 31 Kg Water content C.H.: 0.8 Litre Water content D.H.W.: 0.2 Litre

Gas Supply Connection 15 mm compression isolating valve
Flow connection C.H. 22 mm compression isolating valve
Return connection C.H. 22 mm compression isolating valve
Inlet connection D.H.W. 15 mm compression isolating valve
Outlet connection D.H.W. 15 mm compression valve
Safety discharge C.H. 15 mm copper pipe
Condensation drain 3/4” (21.5 mm) push fi t over fl ow

Max cold water capacity without additional expansion vessel 110 Litre

Sealed water system C.H.
Max pressure PHS 2.5 bar
Minimum working pressure 0.5 bar
7 Litres expansion vessel pre-charge-pressure 0.5 bar

Central Heating operating temperature Max 80 °C min 35 °C
Design fl ow rate 1066 I/h 20 °C rise

Minimum fl ow rate C.H. 350 l/h
D.H.W. fl ow rate 30 °C rise 11.9 l/min

D.H.W. fl ow rate 35 °C rise 10.2 l/min
D.H.W. fl ow rate 40 °C rise 8.9 l/min 10°C Inlet temperature

D.H.W. temperature Max 60 °C min 35 °C

Fan speed D.H.W. Max 6000 rpm - 200 Hz min 1200 rpm - 40 Hz
Qmw Input Net Max 25.5 kW min 3.7 kW

D.H.W. Pressure Pmw Max 6.5 bar
D.H.W. Pressure Pmw min 0.5 bar
D.H.W. Minimum Flow Rate 2.5 I/min

Flue outlet nom. diameter 100 mm specially supplied with boilers (If required)

Destination: GB, IE Category: II2H3P

Flue Type: C13 - C33 - C53 SEDBUK A Electrical protection index: IP X4 D

LWA sound power level, indoors 50.5 dB NOx class 5 - 24.40 mg/kWh

ErP D.H.W.

Seasonal space heating energy effi ciency class Water heating energy effi ciency class

µs seasonal space heating energy effi ciency 91.7 % Load Profi le XL
Pn nominal heat input 21.0 kW µwh water heating energy effi ciency 85.1 %
P4 nominal heat output high temperature 20.4 kW Qfuel daily fuel consumption 22.774 kWh
P1 nominal heat output (30% Pn) low temperature 6.1 kW AFC Annual fuel consumption 17.284 GJ
Qelec daily electricity consumption 0.2046 kWh
AEC annual electricity consumption 44.802 kWh

µ4 effi ciency at nominal heat output high temperature 87.3 %
µ1 effi ciency at 30% nominal heat output low temperature 97.0 %

Auxiliary electricity consumption:

elmax at full load 0.034 kW PSB in standby mode 0.005 kW
elmin at part load 0.016 kW Pstby standby heat loss 0.028 kW

15

16

3.2 TECHNICAL DATA

TABLE 2/C HE 30 S

NATURAL GAS (G 20) П2H3P

Nominal heat Input net QMS 25.0 kW
Minimum heat Input net 4.0 kW

Nominal heat output 24.3 kW
Nominal heat output condensing 26.4 kW
Minimum heat output 3.7 kW
Minimum heat output condensing 4.2 kW

Inlet pressure 20 mbar Gas rate after 10 minutes Max 2.6 m3/h - min. 0.4 m3/h

Fan speed Max 5400 rpm - 180 Hz Combustion % CO2 : 9.0 (+ 0.5 / - 0.5) Case On
C.H. min 1200 rpm - 40 Hz 9.0 (+ 0.5 / - 0.5) Case Off

Electrical supply: 230 V ~ 50 Hz
External fuse rating: 3 A Internal fuse F1: 3.15 A (20 mm To BS 4265)

Dry weight : 32 Kg Water content C.H.: 0.8 Litre Water content D.H.W.: 0.2 Litre

Gas Supply Connection 15 mm compression isolating valve
Flow connection C.H. 22 mm compression isolating valve
Return connection C.H. 22 mm compression isolating valve
Inlet connection D.H.W. 15 mm compression isolating valve
Outlet connection D.H.W. 15 mm compression valve
Safety discharge C.H. 15 mm copper pipe
Condensation drain 3/4” (21.5 mm) push fi t over fl ow

Max cold water capacity without additional expansion vessel 110 Litre

Sealed water system C.H.
Max pressure PHS 2.5 bar
Minimum working pressure 0.5 bar
7 Litres expansion vessel pre-charge-pressure 0.5 bar

Central Heating operating temperature Max 80 °C min 35 °C
Design fl ow rate 1811 I/h 20 °C rise

Minimum fl ow rate C.H. 350 l/h
D.H.W. fl ow rate 30 °C rise 14.0 l/min

D.H.W. fl ow rate 35 °C rise 12.0 l/min
D.H.W. fl ow rate 40 °C rise 10.5 l/min 10°C Inlet temperature

D.H.W. temperature Max 60 °C min 35 °C

Fan speed D.H.W. Max 6600 rpm - 220 Hz min 1200 rpm - 40 Hz
Qmw Input Net Max 31.0 kW min 4.0 kW

D.H.W. Pressure Pmw Max 6.5 bar
D.H.W. Pressure Pmw min 0.5 bar
D.H.W. Minimum Flow Rate 2.5 I/min

Flue outlet nom. diameter 100 mm specially supplied with boilers (If required)

Destination: GB, IE Category: II2H3P

Flue Type: C13 - C33 - C53 SEDBUK A Electrical protection index: IP X4 D

LWA sound power level, indoors 52 dB NOx class 5 - 36.06 mg/kWh

ErP D.H.W.

Seasonal space heating energy effi ciency class Water heating energy effi ciency class

µs seasonal space heating energy effi ciency 92.0 % Load Profi le XL
Pn nominal heat input 25.0 kW µwh water heating energy effi ciency 84.86 %
P4 nominal heat output high temperature 24.3 kW Qfuel daily fuel consumption 22.991 kWh
P1 nominal heat output (30% Pn) low temperature 7.9 kW AFC Annual fuel consumption 17.415 GJ
Qelec daily electricity consumption 0.1533 kWh
AEC annual electricity consumption 33.564 kWh

µ4 effi ciency at nominal heat output high temperature 87.4 %
µ1 effi ciency at 30% nominal heat output low temperature 97.1 %

Auxiliary electricity consumption:

elmax at full load 0.034 kW PSB in standby mode 0.005 kW
elmin at part load 0.016 kW Pstby standby heat loss 0.028 kW

17

3.3 TECHNICAL DATA

TABLE 2/D HE 30 S

LPG (G 31) П2H3P

Nominal heat Input net QMS 25.0 kW
Minimum heat Input net 4.0 kW

Nominal heat output 24.3 kW
Nominal heat output condensing 26.4 kW
Minimum heat output 3.7 kW
Minimum heat output condensing 4.2 kW

Inlet pressure 37 mbar Gas rate after 10 minutes Max 2.6 m3/h - min. 0.4 m3/h

Fan speed Max 5200 rpm - 173 Hz Combustion % CO2 : 10.5 (+ 0.5 / - 0.5) Case On
C.H. min 1200 rpm - 40 Hz 10.5 (+ 0.5 / - 0.5) Case Off

Electrical supply: 230 V ~ 50 Hz
External fuse rating: 3 A Internal fuse F1: 3.15 A (20 mm To BS 4265)

Dry weight : 32 Kg Water content C.H.: 0.8 Litre Water content D.H.W.: 0.2 Litre

Gas Supply Connection 15 mm compression isolating valve
Flow connection C.H. 22 mm compression isolating valve
Return connection C.H. 22 mm compression isolating valve
Inlet connection D.H.W. 15 mm compression isolating valve
Outlet connection D.H.W. 15 mm compression valve
Safety discharge C.H. 15 mm copper pipe
Condensation drain 3/4” (21.5 mm) push fi t over fl ow

Max cold water capacity without additional expansion vessel 110 Litre

Sealed water system C.H.
Max pressure PHS 2.5 bar
Minimum working pressure 0.5 bar
7 Litres expansion vessel pre-charge-pressure 0.5 bar

Central Heating operating temperature Max 80 °C min 35 °C
Design fl ow rate 1811 I/h 20 °C rise

Minimum fl ow rate C.H. 350 l/h
D.H.W. fl ow rate 30 °C rise 14.0 l/min

D.H.W. fl ow rate 35 °C rise 12.0 l/min
D.H.W. fl ow rate 40 °C rise 10.5 l/min 10°C Inlet temperature

D.H.W. temperature Max 60 °C min 35 °C

Fan speed D.H.W. Max 6400 rpm - 213 Hz min 1200 rpm - 40 Hz
Qmw Input Net Max 31.0 kW min 4.0 kW

D.H.W. Pressure Pmw Max 6.5 bar
D.H.W. Pressure Pmw min 0.5 bar
D.H.W. Minimum Flow Rate 2.5 I/min

Flue outlet nom. diameter 100 mm specially supplied with boilers (If required)

Destination: GB, IE Category: II2H3P

Flue Type: C13 - C33 - C53 SEDBUK A Electrical protection index: IP X4 D

LWA sound power level, indoors 52 dB NOx class 5 - 36.06 mg/kWh

ErP D.H.W.

Seasonal space heating energy effi ciency class Water heating energy effi ciency class

µs seasonal space heating energy effi ciency 92.0 % Load Profi le XL
Pn nominal heat input 25.0 kW µwh water heating energy effi ciency 84.86 %
P4 nominal heat output high temperature 24.3 kW Qfuel daily fuel consumption 22.991 kWh
P1 nominal heat output (30% Pn) low temperature 7.9 kW AFC Annual fuel consumption 17.415 GJ
Qelec daily electricity consumption 0.1533 kWh
AEC annual electricity consumption 33.564 kWh

µ4 effi ciency at nominal heat output high temperature 87.4 %
µ1 effi ciency at 30% nominal heat output low temperature 97.1 %

Auxiliary electricity consumption:

elmax at full load 0.034 kW PSB in standby mode 0.005 kW
elmin at part load 0.016 kW Pstby standby heat loss 0.028 kW

18

BS5546: Installation of gas hot water
supplies domestic purposes

(2nd Family Gases).

BS5440: 1 Refers to flues.

BSEN 15502-2-2:2014, BS EN 15502­1:2012+A1:2015, BS EN 15502-2-1.2012:
Gas fired central heating boilers.

I.S. 813: Domestic gas Installations.

The followings standards give

valuable

additional information:

BS 7074: Expansion vessels and ancillary
equipment for sealed water system.
BS 7593: Treatment of water in domestic hot
water and central heating system.

Health & Safety Document No.635

The Electricity at Work Regulations, 1989.

IMPORTANT:
These appliances are CE certificated for

safety and performance. It is therefore
important that no external control devices e.g.
flue dampers, economisers etc., are directly
connected to this appliance unless covered
by these Installation and Service Instructions
or as otherwise recommended by Ravenheat
in writing. If in doubt please enquire.

Any direct connection of a control device

not approved by Ravenheat could invalidate
the certification and the normal appliance
warranty.

It could also infringe the Gas Safety

regulations and the above regulations.

NOTE:
The Ravenheat HE 25/30 S Compact combi

boiler has been tested and examined by
CERTIGAZ, in according to:

2006/95 EEC: the low voltage directive.

2004/108 ECC: EMC directive.

2009/142 EEC: gas directive

CE 1935/2004: materials into contact with
foodstuffs

2009/125/EC: Ecodesign for energy-using
appliance.

2010/30/UE: Indication by labelling of the
consumption of energy by
energy-related products.

811/2013: Delegated regulation.

813/2013: Delegated regulation.

4 GENERAL REQUIREMENTS

4.1 SAFETY

Gas Safety (Installation and Use).

Regulations.

It is law that all gas appliances are installed

and serviced by a Gas Safe registered installer
in accordance with the above regulations and
these installation instructions. All registered
installers carry a Gas Safe I.D. card and have a
registration number. Both should be recorded
in your Benchmark commissioning checklist.
You can check your installer on the Gas Safe
register (www.gassaferegister.co.uk). Failure
to install appliances correctly could lead to
prosecution. It is in your own interest, and that
of your safety, to ensure the law is complied
with. Check the boiler and flue is the correct
type for installation undertaken.

The instal lat ion of the boiler MU ST be in

accordance with the latest IET (BS 7671)
Wiring Regulations, local building regulations,
bye-laws of the local water authority,
the building regulations and the Building
Standards (Scotland) and any relevant
requirements of the local authority.

4.2 GENERAL INFORMATION

Both the user and the manufacturer rely
heavily on the installer, whose job it is to

install the combination boiler and connect
it to a correctly designed heating system.
Acquaint yourself with the relevant
British Standards concerning installation
requirements. If you need further advice on
any points contact the Technical Services
Office on 0113 2527007 who would be
pleased to help. It is recommended that tools
suitable for brass fittings are used, and have
a capability to accommodate hexagon sizes
up to 50 mm.

APPLICABLE CODES OF PRACTICE
Ref: Documents.

Detailed recommendations are contained in the

following British Standard Codes of Practice:

BS6891:2015: Low pressure installation

pipes.

BS6798: Installation of gas fired hot water

boilers of rated input not exceeding
70 kW.

BSEN12828: Design for water based heating
systems.

BSEN12831: Heating systems in buildings,
Method for calculation of the
design heat load.

BSEN14336: Installation & commissioning
of water based heating
systems.

19

Manufacturers instructions must NOT be taken in

any way as overriding statutory obligations.

If in doubt on any point please consult Ravenheat.

4.3 LOCATION OF BOILER

Siting of Ravenheat HE 25/30 S Compact combi

boiler must be as follows.

The position of installation should be within the

building, unless otherwise protected by a suitable
enclosure.

Adequate space for installation, servicing and
air circulation around the boiler must be allowed

for.
Ravenheat HE 25/30 S Compact combi boiler
must be fitted on a flat and vertical wall capable
of adequately supporting the weight of the boiler
and any ancillary equipment.

The appliance may be fitted on a combustible

wall. Insulation between the wall and the boiler
is not necessary, unless required by the local

authority.
For electrical safety reasons there must be no
access available from the back of the boiler.

The boiler must not be fitted outside.

LPG versions of this appliance shall not be

installed in cellars or basements.

4.4 CLEARANCES AROUND THE APPLIANCE

Side clearance:

The position of the appliance must provide
minimum clearance of 5mm as the side panels
do not require removing for servicing.
However, if the option is preferred to remove the
panels then a minimum clearance of 55 mm is
required.

Top clearance:
The top clearance should be a minimum of
125 mm.

Bottom clearance:
A bottom clearance of 80 mm is required

between the appliance and any surface.
Though 150 mm is preferred whenever
possible.

Front clearance:
A minimum of 450 mm is required in front of
the appliance for access during servicing, the
front clearance can be reduced when installed
in a cupboard, to 25 mm from the access door.

4.5 IMPORTANT NOTICE

For installation into timber framed buildings,

please refer to the Institute of Gas Engineers

Document IGE/UP/7.
The boiler may be installed in any room or
internal space, although particular attention is

Regulations applicable in Scotland, with
respect to the installation of the combination
boiler in a room or internal space containing
a bath or shower.
Where a room sealed appliance is installed
in a room containing a bath or shower, any
electrical switch or appliance control, utilising
mains electricity should be situated so that it
cannot be touched by a person using a bath
or shower.
A compartment when used to enclose the
combination boiler MUST be designed and
constructed specifically for this purpose.
An existing cupboard, or compartment, may
be used provided it is modified accordingly.
Samples of the HE 25/30 S Compact combi
boiler have been examined by CERTIGAZ
notification body, and are certified to comply
with the essential requirements of the gas
appliance.

Directive 90/396/EEC, the Low Voltage.
Directive 72/23/EEC and shows compliance

with the Electro Magnetic Compatibility.
Directive 89/336/EEC and are therefore
permitted to carry the CE Mark.

The appliance has been tested and approved

by the WRc as meeting the requirements of

G3 and L of the Building regulations and water

Bylaws Scheme - Approved Products.

4.6 GAS SUPPLY

A gas meter is connected to the service pipe

by the Local Gas Supplier or the Local Gas

Supplier contractor. An existing meter should

be checked preferably by the Gas Supplierto

ensure that the meter is adequate to deal

with the rate of gas supply required for all

appliances it serves. Installation pipes should

be fitted in accordance with BS 6891:2015.

Pipework from the meter to the boiler must be

of adequate size

(22 mm) min to within at least one metre of

the boiler, (15 mm) min. can then be used

for remaining pipe work to the appliance.

A smaller size than the boiler inlet gas

connection should not be used. The complete

installation must be tested for soundness as

described in the above code.
.
N.B. It is the responsibility of the Gas Installer

to size the gas installation pipework in

accordance with BS 6891:2015. Whilst the

principle of the 1:1 gas valve ensures the

Ravenheat range is able to deliver the full

output at an inlet pressures as low as 14

mbar, other gas appliances in the property

may not be as tolerant.
When operating pressures are found to be

below the minimum meter outlet of 19 mbar

these should be checked to ensure this is

adequate for correct and safe operation.

20

Allowing for the acceptable pressure loss of 1

mbar across the installation pipework, it can be
assumed that a minimum permitted operating
pressure of 18 mbar (nat gas) will be delivered
to the inlet of the appliance. (reference BS
6400-1 Clause 6.2 Pressure Absorption).

The external gas cock could further reduce the

operating pressure when measure

d at its test
point. The pressure drop is relative to the heat
input to the boiler (kW), refer to graph below.

4.7 FLUE SYSTEM

The terminal should be located where dispersal

of combustion products is not impeded and with
due regard for the damage or discolouration
that might occur to building products in the
vicinity (section 4.10).

The terminal must not be located in a place

where it is likely to cause a nuisance in cold
and/or humid weather as water vapour may
condense on leaving the flue terminal.

The effect of such pluming must be

considered.
The terminal must not be closer than 25 mm
(1 inch) to any combustible material for
protection of combustibles, refer to BS 5440:
Part1.

Pluming will occur at the terminal so, where

possible, terminal positions which could cause

a nuisance should be avoided.
The flue must be installed in accordance with

the recommendations of BS 5440: Part 1.

IMPORTANT NOTES:
For greater fl ue lengths see alternative fl ue
instructions. Flue must be positioned in a
place not likely to cause a nuisance from
pluming.

IMPORTANT NOTICE: If the fl ue terminates

below a balcony, above the ground, above a
fl at roof to which people have access, then
a suitable terminal guard must be fi tted if

less than 2 metres high.

IMPORTANT:

The following notes are intended for general
guidance.
The boiler MUST be installed so that the
terminal is exposed to external air.

It is important that the position of the terminal
allows the free passage of air across it at all
times.

Minimum acceptable spacing from the terminal to
obstructions and ventilation openings are
specifi ed in section 4.10.

Note positions: Due to the terminal design,
installation is possible with clearances less than
those specifi ed in BS 5440, Part 1

NOTE:
The flue must be terminated in a place not
likely to cause a nuisance.

A concentric vertical flue kit is available for

longer flueing applications (see table 5 page

26).

For further details see vertical flue installation

instructions.

4.8 AIR SUPPLY

The following notes are intended for general

guidance.

The room sealed fan flued boiler does not

require a permanent air vent for combustion air
supply.

Where installed in a cupboard or compartment

ventilation is not required.

4.9 WATER CIRCULATION (Central heating)

Detailed recommendations are given in BS

6798: 2014 - BSEN12828 - BSEN12831 ­ BSEN14336 (for smallbore and microbore
central heating systems). The following notes
are given for general guidance.

21

Fig.6

4.11 BOILER INTERLOCK CONTROL

Central heating system controls should be
installed to ensure the boiler is switched off

when there is no demand for heating, in

compliance with Building Regulations.
The boiler has its own built in bypass.
If the system has thermostatic radiator valves on

all radiators, or two port valves, then a bypass

circuit must be fitted with an automatic bypass

valve to ensure a flow of water should all valves

be in the closed position (fig. 6).
It is important that the system is flushed

thoroughly before the appliance is fitted or

left to operate (as recommended in BS 7593)

in order to maintain an efficiently operating

heating system. For replacement installations,

the system MUST be flushed with the old boiler

insitu, in order to prevent system debris. Once

the system has been flushed, an inhibitor
(suitable for stainless steel and aluminium heat
exchanger) should be added (see section

4.18).

4.12 DRAINING TAP

These must be located in accessible positions

to permit the draining of the whole system. The

taps must be at least 15 mm nominal size and

manufactured in accordance with BS 2879.

4.10 PIPEWORK

Copper tubing to BSEN 1057:1 2006, BSEN
1172, BSEN 1652 and BSEN 1653, is
recommended for water pipes. Jointing
should be either capillary soldered or with
compression fittings.
Where possible pipes should have a gradient
to ensure air is carried naturally to air release

points and water flows naturally to drain taps.
It should be ensured as far as possible that
the appliances heat exchanger is not a natural
collecting point for air except where providing
useful heat. Pipes should be insulated to
prevent heat loss and to avoid freezing.
Particular attention should be paid to pipes
passing through ventilated spaces in roofs
and under floors.

IMPORTANT:
A minimum length of 1 metre of copper pipe

MUST be fitted to both the flow and return, as
well as the cold mains inlet and the hot water
outlet connections from the boiler before
connecting to any plastic piping.

The water through the appliance heat exchanger

circuit must exceed the min. 2.38 gals/min. (650
L/h) when the burner is firing. It is important to
ensure that this rate is achieved when sections
of the system are shut off either manually or by
automatic controls.

If the volum e of circulating water is too low, the

boiler water temperature will rise too rapidly.
This could cause noise in the system or even
cause the safety thermostat to trip.

This appliance is designed to work on a two

pipe system as shown in fig.6.

22

4.13 AIR RELEASE POINTS

These must be fitted at all high points where

air will naturally collect, and must be sited to
facilitate complete filling of the system.

The appliance has an integral sealed expansion

vessel to accommodate the increase of water
volume when the system is heated.

It can accept up to

7 L of expansion water

If the appliance is connected to a system with

an unusually high water content, calculate
the total expansion (see table 3) and add
additional sealed expansion capacity as
appropriate (Fig. 7). In general, modern
systems below 7 L should not present any
problem.

4.14 MAINS WATER FEED. CENTRAL HEATING

There must be no direct connection to the

mains water supply, even through a

non-return valve, without the approval of the

Local Water Authority.

Fig.7

4.15 PERMISSIBLE METHODS OF FILLING

Figure depicts the requirements of Diagram

R24.2a of the Water Supply (Water Fittings)
regulations 1999.

Fig.8

23

If the capacity of the central heating system
should exceed 110 L, an additional vessel
should be installed on the return to the
combination boiler from the heating system
(fig. 7). Guidance on vessel sizing is given
(see table 3).

Reference should be made to British Gas

Publications. Draining taps should be at
least 1/2” in BSP nominal size and be in
accordance with BS 2879.

4.17 INSTALLATION TO AN EXISTING CENTRAL
HEATING SYSTEM

The combination boiler is designed to operate

on a sealed system only. Therefore if the
existing system is of the open water type it will
have to be modified to comply with BS 6798.

Before installing a new combination boiler to
an existing system, flush out the old system
with a recommended descaling agent.
If the boiler is installed in an existing system
any unsuitable additives MUST be removed
by thorough cleaning, and flushing out the
old system with recommended descaling
agent.
BS 7593:2006 details the steps necessary

to clean domestic central heating system.
Also check pipework and renew any
corroded pipework or fittings. Valve glands
must be repacked or replaced wherever
necessary and any defective controls
exchanged.

Debris from the system can damage the

boiler and reduce the efficiency. Failure
to comply with the guidelines for the use
of water treatment with the appliance will
invalidate the appliance guarantee and
contravene the Building Regulations.

It is recommended that you fit a primary
water cleanser to the system. We
recommend fitting a filter that will help
remove both magnetite and non-magnetic
debris.

4.18 WATER TREATMENT

This boiler has a stainless steel heat

exchanger, Ravenheat recommend the
use of FERNOX or SENTINEL, or other
treatm ent products recognised by Ravenheat
which must be used in accordance with the
manufacturer’s instructions.

Safety

valve setting (bar)

3.0

Vessel charge

pressure (bar)

0.5 1.0 1.5

Initial system

pressure (bar)

0.5 1.0 1.5 2.0 1.0 1.5 2.0 1.5 2.0

Total water

content of system

EXPANSION VESSEL VOLUME (LITRES)

Litres

25
50

75
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
475
500

2.1

4.2

6.3

8.3
10 . 4
12 . 5
14 . 6

16. 7

18. 7

20.8
22 .9
25 . 0
27 .0

29.1
31 .2
33 . 3

35.4
37 . 5
39 . 6

41.6

3.5

7.0
10 . 5
14 . 0
17 . 5
21 . 0
24 . 5
28 . 0

31 .5
35 .0
38 .5
42 .0
45 .5
49 .0
52 .5
56 . 0
59 . 5
63 . 0
66 . 5
70 .0

6.5
12 . 9
19 . 4
25 . 9
32 .4
38 . 8

45.3
51 .8
58 .3
64 . 7
71 .2
77 .7
84 . 1
90 .6

97 .1

103.6

110.1

116.5
123 .0

125.9

13 . 7

27.5

41.3
55 .1

68.9
82 .6

96.4

110.2

124.0
137 .7
151 .5

165.3
179 .1

192.8

206.6

220.4

239.2

247.9

261 .7

275.5

2.7

5.4

8.2

10.9
13 . 6

16.3
19 . 1

21.8

24.5
27 .2
30 .0
32 .7
35 .7
38 .1

40.9

43.6

46.3

49.0
51 .8
54 .5

4.7

9.5
14 . 2
19 . 0
23 . 7

28.5
33 . 2
38 . 0
42 .7

47.5

52..2
57 .0

61 .7

66.5

71 .2
76 .0
80 . 7
85 .5
90 . 2

95 . 0

10 . 3
20 . 6
30 .9
41 . 2
51 .5
61 .8
72 . 1
82 .4
92 . 7

103.0

113.3

123.6
133 .9
144 .2
154 .5

164.8
175 .1

185.4
195 .7

206.0

3.9

7.8

11. 7

15.6
19 . 5
23 . 4

27 .3

31 . 2

35 .1
39 . 0
42 .9
46 . 8
50 . 7
54 .6
58 .5

62.4

66.3
70 . 2
74 . 1
78 .0

8.3

16.5

24 . 8

33.1
41 . 3
49 . 6

57.9

66 . 2

74.5
82 . 7
91 .0
99 . 3

10 7 . 6
115 .8
12 4.1

132.4

140.7
14 8 . 9
15 7 . 2
16 5. 5

For system volumes
other than those given
above, multiply the
system volume by
the factor across

0.0833 0.140 0.259 0.551 0 .109 0.190 0.412 0.156 0.331

4.16 SIZING OF ADDITIONAL EXPANSION VESSEL TABLE 3

Deduct from the value given in the table the 7 litre vessel supplied.

Note: This pressure can be increased up to 1.5 bar to suit high static head situations.

4.19 HARD WATER AREAS

If the area of installation is recognised as

a hard water area, it is recommended that a
suitable water treatment device is installed on
the mains supply. The water hardness can be

determined by using the standard test paper or
by referring to local water authority.

4.20 DOMESTIC WATER

The domestic hot water must be in accordance

with the relevant recommendations of BS 5546.
Copper tubing to BS EN 1057 is recommended
for water carrying pipework and MUST be used
for pipework carrying potable water.

Important:
It is important that at installation allowance

must be made for the expansion of DHW within

the appliance. If the DHW inlet has a back flow
prevention device fitted for example a non­return valve or water meter. Then additional
measure should be taken in the form of a mini
expansion vessel. Fitted in the cold inlet pipe
between the back flow prevention device and
the boiler.

4.21 ELECTRICAL SUPPLY

Warning: this appliance must be earthed

External wiring to the appliance must be
carried out by a competent person and be in
accordance with the current I.E.E. Regulations
and local regulations which apply. Ravenheat
boiler is supplied

with a connection to a 230 V

~ 50 Hz single phase supply.

The supply must be fused at 3 A.

NOTE: The method of connection to the
electricity supply MUST facilitate complete
electrical isolation of the appliance, by the
use of a fused, double pole isolator, having
a contact separation of at least 3 mm in all
poles. The point of connection to the electricity
supply must be readily accessible and adjacent
to the appliance except, where the appliance is
installed in a bathroom.

The current electrical IEE Wiring
regulations must be followed in UK.

5 INSTALLATION

5.1 WARNING

It is MOST IMPORTANT that this appliance is

installed in a HORIZONTAL POSITION, with
the flue air duct passing through the wall.

Make sure the flue is at a 1.5° incline, rising

from the boiler with 50 mm.
Flue terminal diagram states 1.5° - 25 mm,
fall back on flue (fig. 9).

5.2 DELIVERY

The appliance carton contains:

a) Installation instructions,
user instructions and Benchmark log
book
b) White paper template
c) Guarantee card
d) Polythene bag containing:

- 1-15 mm gas service valve

- 2-22 mm compression ball valves

complete with 3/4” washers

- 1-15 mm compression ball valves
complete with 1/2” washers

- 1- 15 mm compression ball valve

- 2 fi xing bolts and wall plugs

IMPORTANT NOTES:

This appliance will produce a plume of

condensation in cool weather. This is due to
the High Effi ciency and hence low fl ue gas
temperature of the boiler. A plume management kit
is available. (see section 5.7 fi g 12)

5.3 UNPACKING OF BOILER

IMPORTANT:
With regard to the Manual Handling

Operations, 1992 Regulations, the following

lift operation exceeds the recommended

weight for a one man lift.

- Stand the boiler carton upright.

- Open the top of the carton.

- Rest the carton on the fl oor
(keeping the fl aps open).

- Turn the carton over with the boiler inside
and then pull the carton up away from
the boiler.

- Rest the boiler on its back on the
fl oor to prepare it for installation.

5.4 POSITIONING OF THE BOILER

Unscrew the two lower screws that secure the

front panel and pull forward and lift up
(fig. 39).

Unscrew the 4 screws that fasten the lower

grating on the casing and remove it from the
bottom of the casing.

Make sure the casing and screws are put to

one side in a safe place.

Fig.9

24

5.5 FLUE TERMINAL POSITION

25

IMPORTANT: Please lubricate the
internal part of the seals before
fitting.

26

TYPE OF FLUE SYSTEM (All types) - minimum and maximum distance TABLE 4

Flue type C

13

C33 C

53

1

Flue Diameter 60/100 80/125 60/100 80/125 80 mm

(concentric) (concentric) (concentric) (concentric) single pipe

Minimum length (m) 0.3 0.3 1.0 1.0 0.5

(horizontal length) (horizontal length) (vertical length) (vertical length)

Maximum length (m) 8.0 23.0 13.0 26.0 43.0

Equivalent length of 45° bend (m) 0.5 1.25 0.5 1.25 1.25

Equivalent length of 90° bend (m) 1.0 2.5 1.0 2.5 2.5

5.6 OPTIONAL EXTRAS

HORIZONTAL FLUE KIT BOX CONTAINING
(Fig 10):

52 - Self-cutting joint securing screw
57 - Elbow header
59 - Rubber seal Ø 60

56 - Rubber seal Ø 100
60 - Fumes sample point
61 - Flue exhaust duct
62 - Air intake duct
69 - Air sample point
127 - Terminal Rubber wall seal

Fig 11

Fig 10

WARNING: With horizontal concentric fl ue, the
maximum fl ue length is 8 metres, duct extension can be
used with the standard fl ue (see table 4).

FLUE EXTENSION BOX CONTAINING (Fig. 11):
1000 mm fl ue extension duct as an extra cost only
when requested for side and vertical fl ue applications.

59 - Rubber seal Ø 60
63 - Air intake duct extension

64 - Flue exhaust duct extension

Generally speaking, oils and greases are not
suitable for the “peroxide -EPDM”,
therefore we suggest a correct lubrication
using silicon-substances, for instance
“Silikon Spray“ (Arexons).

Plume Management Kit TABLE 5

Maximum Length (mm) 6000
minimum length (mm) 500

Equivalent length of 45° bend (mm) 500
Equivalent length of 90° bend (mm) 1000

IMPORTANT : Max fl ue length must not exceed
6 m with a horizontal concentric
60/100 fl ue of 3 m ( L )

Fig. 12

The Maximum permitted fl ue length is
measured from the centre line of the
fl ue terminal to the top of the outlet
terminal

5.7 PLUME MANAGEMENT KIT (Fig 12)

Max 6000 mm fl ue extension duct as an
extra cost only when requested to reduce
pluming nuisance of condensation from
60/100 horizontal concentric fl ue.

IMPORTANT: Please lubricate the
internal part of the seals before
fitting.

Fig. 12a

FLUE EXHAUST DEFLECTION BEND (Fig 12a)

Flue exhaust defl ection bend are also available.
These come in both 45° and 90° degree versions.
These bends fi t directly onto the fl ue exhaust terminal
to defl ect the fl ue gas plume in an upward
or sideways direction.
Although they are not substitute for a plume kit, they
can be considered useful where condensate pluming
is causing a nuisance or can be used to eliminate
condensate collecting on the end of the horizontal
fl ue terminal.

27

Plume Management Kit Part No.

Part. No. Description

TER110101 1 metre high plume kit containing:
(Fig. 12) n. 1 terminal bend
n. 1 90° elbow bend
n. 2 45° bend
n. 1 metre 60 M-F fl ue length
n. 1 fl ue length bracket

CUR110050 45° fl ue exhaust defl ection bend
(Fig. 12a)

CUR110100 90° fl ue exhaust defl ection bend
(Fig. 12a)

L+L max 6000 mm
minimum plume kit length 500 mm

28

5.8 INSTALLING THE APPLIANCE FOR REAR
FLUE OUTLET (Fig. 13, 16, 17, 18).

FOR APPLIANCE CLEARANCES SEE
SECT. 4.4 AND SECT. 4.10

Use adhesive tape to attach the template to

the wall, making sure that the centre line is
vertical and that the clearance distance is no
less than that shown in fig. 13.

-

Mark the two holes for the top fixing bolts to
fix the boiler on the wall as well as the
centre of the flue duct.

- Detach the template from the wall.

- Use a 10 mm dia drill to make the 2 holes.
Insert the plastic expansion plugs.

- Cut or core drill a 105 mm dia hole for

inserting the flue duct.

Fit the elbow header into the flue flange on the
top of the boiler, positioning it towards the
required direction (fig 13).

Important: Make sure that the inner 60 mm
diameter of the elbow header is inserted
fully into the heat exchanger, and the
rubber seal is correctly fitted.
(Fig 17 item 65)

If using the horizontal flue duct and it is too
long it can be shortened. Should it be
necessary to cut the flue always cut on right
angles and ensure the cut is de-burred.

Note: Add 30 mm to allow for terminal rubber
wall seal (fig.10 item 127).

Insert the flue assembly locating it onto the
wall.

Lift the boiler on the wall, locating onto the top
two fixing bolts. Tighten the two bolts using a
spanner to secure to the wall.

Working above the boiler pull the flue exhaust
duct towards the boiler in order to engage tube

(fig. 18 item 61) into its header.

Position flue into elbow header and push so as

to locate inner and outer flue correctly ensuring
a good seal is made with O-rings. Tighten the
two screws on the flue flange to secure the
elbow header in place

Fit the terminal rubber wall seal and if

necessary terminal guard.

Extension kits are available to order for flue
extension of up to a total overall length of 8
metres (fig.18).

Each extension length extends the pipe by

approximately 1000 mm long up to a maximum
of seven extensions.

Extensions must be installed with the widened

end of the pipe and the tapered end of the flue
pipe aimed towards the exhaust terminal.

IMPORTANT:
Inline flue bend - 1000 mm must be deducted
from overall length for each 90°bend. Obtuse
flue bend - 500 mm must be deducted from
overall length for each 135° bend
(see table 4).

5.9 INSTALLING THE APPLIANCE FOR SIDE

FLUE OUTLET (Fig. 14, 15, 16, 17, 18)

- Attach the template to the wall with adhesive
tape, making sure that the centre line is

vertical and that the distance from the centre
line to the nearest side wall is not less than
measurement in fi

g.14.

- Mark the two fixing bolt securing holes on the
wall and extend the axis of the flue duct hole
to the side wall ensuring it is horizontal.

- Make sure flue slopes 1.5° down towards

the boiler and that there is a 25 mm fall per
metre of the flue length.

- Trace the centre of the flue duct hole and
measure distance from the corner of the
wall (fig.14), measure the distance 124 mm
between the centre of flue duct hole to the
corner.

Detach the template from the wall.

- Use a 10 mm. dia drill to make the 2 holes for
the

fixing bolts. Insert the plastic expansion
plugs. Core drill a 105 mm dia. hole in the
side wall for inserting the flue duct.

Fit the elbow header into the flue flange on
the top of the boiler, positioning it towards
the required direction.

Important: Make sure that the inner 60mm
diameter of the elbow header is inserted
fully into the heat exchanger, and the
rubber seal is correctly fitted.
(Fig 17 item 65)

If using the horizontal flue duct and it is too
long it can be shortened.
Should it be necessary to cut the flue
always cut on right angles and ensure the
cut is de-burred.

Note:

Add 30 mm to allow for terminal

rubber wall seal (fig.10 item 127).

29

Fig 13

REAR FLUE OUTLET

Insert the flue assembly into the wall, making

sure it will not interfere when fixing the boiler
on the wall.

Lift the boiler on the wall, locating onto the
two fixing bolts. Tighten the two bolts using a
spanner to secure to the wall.

Working above the boiler pull the flue duct
towards the elbow in order to engage the
tube into its header (fig.10). Position the flue
elbow in line with the flue and push so as to
locate inner and outer flue correctly. Ensuring
a good seal is made with O-rings. Tighten the
two screws on the flue flange to secure the
elbow header in place.

IMPORTANT:

Terminal rubber wall seal must be fitted
(127 fig.10 item 127).

Each extension length extends the pipe

by approximately 1000 mm long up
to a maximum of seven extensions.

Pipe length can be established using the

instructions in section 5.5. Extensions must
be installed with the widened end of the air
intake pipe and the tapered end of the flue
pipe aimed towards the exhaust terminal.

NOTE: The position of the appliance must provide
minimum side clearances of 5mm as the
side panels do not require removing for
servicing. However, if the option is
preferred to remove the panels then a
minimum clearance of 55mm is required.

Extensions must be joined together with the
standard terminal pipe, and inserted in each
other as far as they can go.

If an extension must be shortened, this must

be done from the straight end, and not from
the widened or tapered end. To measure the
pipeline properly all components must be
assembled and total length measured before
cutting. The straight end of the extension
connects to the boiler. The flue output and air
intake pipes fits into the boiler header until it
stops (fig.17 - 18).

When cutting both inner and outer ducts of

the extension, always ensure that the reduced
end (male) of the inner and outer duct are
square and to the same length.

30

Fig. 15

All joints must be sealed with the rubber seals

supplied.

It is important to put the centering spacer, supplied

with the unit, inside between the two pipes, from
the side opposite the extension’s straight end.

NOTE: A suitable support bracket (flue bracket)

is available from Ravenheat and should be used
to support the flue length at least every one
metre preferably at each joint this bracket should
be secured to wall and flue duct.

SIDE FLUE OUTLET

Fig. 14

NOTE: The position of the appliance must provide
minimum side clearances of 5mm as the
side panels do not require removing for
servicing. However, if the option is
preferred to remove the panels then a
minimum clearance of 55mm is required.

5.11 INTAKE AND EXHAUST TERMINAL COMPONENTS

Fig.17

IMPORTANT: Please lubricate the
internal part of the seals before
fitting.

5.12 IN-LINE FLUE BEND AND FLUE EXTENSION

Fig.18

49 - In-line Flue Bend
52 - Self-cutting joint securing screw
56 - Rubber seal Ø 100
59 - Rubber seal Ø 60
63 - Air intake duct extension
64 - Flue exhaust duct extension

31

KEY

50 - Flue adapter
52 - Self-cutting joint securing screw
56 - Rubber seal Ø 100
57 - Elbow header
58 - Header gasket

59 - Rubber seal Ø 60
60 - Fumes sample point

61 - STD fl ue exhaust duct
62 - Terminal
65 - Flue manifold rubber seal

66 - Securing screw
67 - Flue temperature sensor

69 - Air sample point
127 - Terminal Rubber wall seal

Fig 16

IN-LINE FLUE BEND
Measure the distance between the flue bends or

the flue/terminal assembly. The measurements
should be taken from the outer edge of the flue
and bend (fig. 18).

5.10 COMPLETING HORIZONTAL FLUE
INSTALLATION.

Ensure the flue system has been checked for

soundness, is stable and secure. Where the
horizontal flue terminal passes through the
external wall, it is essential that the flue must

be sealed on both in exterior and interior
part of the wall, and securing screws fitted.

The terminal rubber must also be fitted
(fig. 16-17 item 127).

L + L = 8m Max

Fig. 19

Straight Flue Straight Flue Offset Flue Offset Flue
L = 12 m Max L = 12.0 m Max L = 10 m Max L = 11 m Max
plus Terminal plus Terminal plus 2 bend 90° plus 2 bend 45°
and Terminal and Terminal

Fig. 20

32

5.13 VERTICAL FLUE INSTRUCTION ONLY (Fig. 19-20-21)
SEE SECT. 4.10 FOR PERMISSIBLE FLUE POSITION

IN-LINE FLUE BEND - 1000 mm MUST BE DEDUCTED FROM OVERALL LENGTH FOR EACH 90° BEND
OBTUSE FLUE BEND - 500 mm MUST BE DEDUCTED FROM OVERALL LENGTH FOR EACH 135° BEND.

The vertical flue kit is intended for use where
a horizontal flue outlet is not possible or desired.
The vertical flue can be used either with a flat roof
or a pitched roof (maximum pitch 60°).
Where a straight vertical flue is not possible or desired,
an offset vertical flue can be used in conjunction with
a side horizontal flue extension piece and in-line
135°/90° flue bend (fig. 19).

Proceed with installation as detailed in section 5
ignoring all references to horizontal flue installations.
Use adhesive tape to attach the template to the wall,
making sure that the centre line is vertical and that the
flue centre line is virtually below the point at which the
flue will exit the roof.

- Ensure that the maximum permissible flue
length is not exceeded (fig. 20 and see table 5).

- Mark the two wall fixing bolt holes

- Detach the template from the wall.

- Use a 10 mm dia. drill to make the 2 holes.

- Insert plastic expansion plug.

- Screw in the two coach bolts.

- Position the flue sample point starter (straight

flue header which must be fitted) and tighten the
two screws on the flue flange (fig. 22 item 66),

and ensure that the gasket is correctly fitted.

Important: Make sure that the inner 60

mm diameter of the straight flue header is
inserted fully into the heat exchanger, and
the rubber seal is correctly fitted. (Fig 22
item 65)

IMPORTANT NOTES : For greater flue
length see twin flue or concentric 80/125
flue instructions

IMPORTANT: Please lubricate the
internal part of the seals before
fitting.

Straight Flue Offset Flue Offset Flue
L = 12 m Max L = 12 m Max L = 11 m Max
plus Combi ridge plus 2 bend 90° plus 2 bend 45°
and Combi ridge and Combi ridge

33

Fig. 21

Starting at the appliance end, assemble the
extension duct sections, making each inner and
outer (flue) joint by inserting the spigot end into
the socket end of the next tube, making sure the
seal rings are correctly located (fig. 22). Make sure
that the entire flue is adequately supported. Use at
least one bracket for each extension used.
Ensure that all inner flue connections have a good
fit/seal, and that the space clips in each extension
are correctly positioned.

Fig.22

Fig.23

Cut a 105 mm diameter hole through the ceiling and/or
roof, at the point previously marked.
Fit a roof flashing slate to the roof, available from
Ravenheat. Insert the Vertical Flue terminal assembly
through the flashing slate from the outside.
Lift the boiler on the wall, locating onto the top two
fixing bolts. Tighten the two bolts using a spanner to
secure to the wall.
Measure the vertical distance between the top of the
flue and the bottom of the flue terminal assembly (fig.

21). The measurements should be taken from the outer
diameter of the flue.
NOTE: Where this length does not match any standard
combination of the extensions, only the extension can
be cut to the required length (fig. 23).
When cutting both inner and outer ducts of the
extension, always cut on spigot side, and they must
be de-burred.

KEY

52 - Self-cutting joint securing screw
56 - Flue adapter
58 - Header gasket
59 - Rubber seal Ø 60
60 - Fumes sample point
63 - Flue extension
64 - Flue exhaust duct extension
65 - Flue manifold rubber seal
66 - Securing screw
68 - Flue starter
69 - Air sample point

Part. No. Description

COL0160050 Straight fl ue header / sample point
60/100
PRFE Flue Extension 60/100 L1000
PR45FBI 45° bend 60/100
PR90FBI 90° Elbow bend 60/100
PR5023016 Horizontal terminal 60/100
TER110200 Vertical fl ue Terminal
TEG060050 Flashing Sleeve/Slate

ACCESSORIES CONCENTRIC FLUE 60/100 EXTRAS:
TABLE 6

Fig. 24

IMPORTANT: Please, lubricate the
internal part of the seals before
fitting.

34

IMPORTANT:
These instructions must be read in

conjunction with the main installation and
servicing instructions.
As with all fl ues the kits must be installed
taking due account of the current issue of BS
5440 parts 1 & 2 and timber frame housing
DM2 is referenced to the Institute of Gas
Engineers Document IGE/UP/7.
Also note that the requirements will vary
depending upon the kit being installed.
Guidance is provided but unless otherwise
stated, always comply with the
recommendations of the relevant codes of
practice.

5.14 INSTALLATION INSTRUCTIONS FOR TWIN FLUE PIPE (ECCENTRIC FLUE DUCT SYSTEM)

5.15 TWIN FLUE INSTRUCTIONS

This part of the installation manual covers the

installation and fi xing instructions of the twin
fl ue eccentric fl ue duct systems only.
When ordering twin fl ue it must be stated for
HE 25/30 S Compact range.
Typical installation procedures are illustrated
by the drawing (fi g.24).

Remove the front panel of the case (sect.8.1).
Unscrew the screws (item 66 fi g. 17) on the
fl ue adapter.

Make sure that the heat exchanger rubber
seal is located, and lubricate the internal part
of the seal before assembly.
Locate the header gasket on the twin fl ue
header and push into the fl ue adaptor making
sure that the inner plastic exhaust locates fi r­mly in the outlet spigot of the heat exchanger,
and screw the securing screws that secure

the twin fl ue header on to the boiler.
Locate the 2 x 80 mm O-rings in the twin
flue header and lubricate the internal part of
the seal before assembly to ensure an easy
snug fi t.

Measurements and bends must be calculated

correctly to ensure the maximum flue length

is not exceeded.

All located O-rings must be lubricated with a

silicone grease to ensure a snug fit.

NOTE: Exhaust flue must slope 1.5° down

towards the boiler 25 mm/m fall per metre of

flue length.

Spacing Clips

Spacing Clips are available on request should

they be required.

NOTE: for eccentric vertical flue a 125 mm

(5 in) diameter flashing plate will be required.

Part. No Description

SDO160050 Twin fl ue header F80/F80
PRO110200 Straight pipe L.1000 80
CUR110150 90° elbow bend 80
CUR110200 45° bend 80
GRI110050 Air inlet terminal 80
GRI110100 Exhaust terminal 80
TER060110 Vertical eccentric fl ue Terminal

TABLE 7

Fig. 26

Fig. 25

35

Exhaust/suction system with concentric pipes for
fl at or sloping roofs. Extensions with two separate
pipes (fi g. 24).

Maximum distance: T = L = 21 + 21 = 42 metres + Terminal
Minimum distance: L = 0.5 + 0.5 = 1 metres + Terminal

Exhaust terminal must not be cut.

NOTE:

- If bends are used in the exhaust fl ue then horizontal
sections must be avoided and there must be a 1.5° slope

- Towards the boiler 25 mm fall per metre.

IMPORTANT:

-

See fi g. 6 for terminal clearances.

Exhaust/suction system with with two separate
rated 80 dia. pipes exhaust on fl at or sloping roof,
suction from vertical wall (fi g. 25).

Maximum distance D = L + L1 = 39.5 metres + Terminal
Minimum total length = 2 metres
NOTE: Exhaust fl ue must slope 1.5° down towards the
boiler 25 mm fall per metre.

Exhaust/suction system with two separate
pipes through a single vertical wall (fi g. 26).

Maximum distance: D = L + L1 = 37 metres
Minimum distance: D = L + L1 = 1 metres
Min distance between pipe 50 mm.

IMPORTANT NOTICE:

- Inlet and exhaust terminals must never
be installed on opposite walls of the building (PrEN 483).

- If the fl ue terminates less than 2 m above a balcony, above

the ground, or above a fl at roof to which people have access,
then a suitable terminal guard must be fi tted.

- Fit only recommended fl ue terminal guard by securing
concentrically around terminal with screws.

Available on request from:
RAVENHEAT MANUFACTURING LTD
Chartists way, Morley, Leeds, West Yorkshire
ENGLAND LS27 9ET - U.K.
Tel: [phone]

5.16

5.17

5.18

IMPORTANT: Please lubricate the
internal part of the seals before
fitting.

36

5.19 INSTALLATION INSTRUCTIONS FOR CONCENTRIC 80/125 FLUE SYSTEM

L + L = 23.5m Max

Straight Flue Straight Flue 90° Offset Flue 135° Offset Flue
L = 25 m Max L = 20 m Max L = 20 m Max L = 22.5m Max
plus Terminal plus Terminal plus Terminal plus Terminal

The vertical 80/125 flue kit is intended for use
where a horizontal 60/100 flue outlet is not
possible or desired.
The vertical flue can be

installed on either a flat
roof or a pitched roof (maximum pitch 60°).
Where a straight vertical flue is not possible or
desired, an offset vertical flue can be used in
conjunction with a side horizontal flue extension
piece and an inline 135°/90° flue bend (fig. 27).

Part No Description
COL160050 Straight fl ue header / sample point
60/100
PRO110300 Flue Extension 80/125 L1000
RID110050 125/80 to 100/60 Flue reducer
CUR110250 45° fl ue bend 80/125
CUR110300 90° elbow fl ue bend 80/125
TER010050 Horizontal Flue Terminal 80/125
TER110200 Vertical Flue Terminal 80/125
TEG060051 Flashing sleeve/slate

IMPORTANT:

- See fi g. 6 for terminal clearances.

Fig. 27

IMPORTANT NOTICE:
When using our vertical fl ue kit the 125 mm x 100 reducer is supplied
complete with the vertical terminal simply remove this and fi x it into
the straight fl ue header (which must be fi tted) on the top of the boiler.

Fig. 28

NOTE : If using Flue arrangement in fi g. 27 then the 125x100 Flue reducer
must be purchased separately.

IMPORTANT: Please lubricate the
internal part of the seals before
fitting.

TABLE 8

Available on request from:
RAVENHEAT MANUFACTURING LTD
Chartists way, Morley, Leeds, West Yorkshire
ENGLAND LS27 9ET - U.K.
Tel: [phone]

5.25 POSITION OF WATER/GAS
CONNECTIONS

37

5.20 ASSEMBLE BOILER

5.21 Fitting valve pack

Remove plastic caps from boiler connection
and fit valves as per fig. 29 using the washers
provided.

It is recommended fitting the valve pack
before installing the boiler on the wall.

5.22 GAS CONNECTION (Fig. 29)

A minimum working gas pressure of 20 mbar (8

in w.g.) must be available at the boiler inlet at
full flow rate (37 mbar for propane).

(Also see section 4.6)

Fit the gas service cock to the boiler via the
union nut and connect gas pipe. Do not over
tighten and use another spanner as a counter
force to avoid straining internal connections.

Important consult (sect 4.6).

5.23 CENTRAL HEATING CONNECTION
(Fig. 29)

Before any central heating connections are

made to the boiler all system valves should
be opened and the system thoroughly flushed
out with cold water.

- Connect the central heating return pipe to
the isolating cock.

- Connect the central heating flow pipe
to the isolating cock marked CHF.

- Pipe dimensions and positions are
marked on template supplied (fig. 30).

5.24 DOMESTIC HOT WATER CONNECTION
(Fig. 29)

The domestic hot water circuit does not need

a safety valve but it is essential to ensure that
the pressure of the cold water supply does
not exceed 10 bar. If in doubt it is advisable
to install a pressure reducing valve. The
minimum pressure needed to operate the
domestic hot water system is 0.5 bar with
a flow of approx 3 L per min. Flush out all
foreign matter from the supply pipe before

and after connecting to the appliance.

- Connect the 15 m m. cold water pipe to the
appliance inlet.

- Connect the 15 mm. hot water pipe to the
appliance outlet.

Fig. 30

Fig. 29

38

5.26 SAFETY VALVE DISCHARGE

The safety valve is located to the rear

(15 mm copper) to permit a discharge pipe
to be connected. When connecting ensure the

discharge pipe does not restrict access. The
discharge should terminate facing downward
exterior to the building in a position where
discharging (possibly boiling water & steam)

will not create danger or nuisance, and not

to cause damage to electrical components
or wiring. The discharge must not be over an
entrance or a window or any other type of
access.

5.27 CONDENSATE DRAIN CONNECTION

It is important to verify that the
drip-plate with drain trap contains
water.
If necessary, the drip plate can be filled
using the trap provided (Fig. 49).

The condensate drain connection is a flexible

3/4” pipe and is therefore adjustable Fig. 49.
The drain pipe should have a fall of a least

2.5° away from the boiler. Condensate should,

if possible be discharged into the household

internal drainage system.
If this is not practicable, discharge can be

allowed into the external household drains or a

purpose designed soak away.

It is recommended that any external condensate

drain pipe is insulated and also must be of 40
mm (1” 1/2) diameter, through the outside wall to
prevent freezing in adverse weather conditions.

It is not necessary to provide air breaks or extra

traps in discharge pipe as there is already a 125
mm high trap inside the boiler.

Fitting an extra trap may cause the boiler siphon

to work incorrectly.

Refer to BS5546 or BS6798 for advice on

disposal of boiler condensate.

Notes: ALL EXTERNAL PIPE RUNS MUST BE IN ACCORDANCE WITH BS 6798

1 - INTERNAL TO SINK WASTE UPSTREAM OF
SINK WASTE TRAP

2 - INTERNAL CONNECTION TO SOIL VENT
STACK
Make connection to SVP using a solvent
welded saddle.

Fig. 32

Fig. 31

39

3 - TERMINATION TO SOAK AWAY 4 - TERMINATION TO DRAIN / GULLY

WARNING:
If the supply cord is damaged, it must be
replaced by a service engineer (supply
cord available from Ravenheat).

5.29 OUTDOOR SENSOR

For use, consult Outdoor Sensor
instructions.

6 COMMISSIONING

Each boiler has been through a rigorous
operational testing procedure at our factory
and should not require any further

adjustment, if you are not the installer but
just commissioning this boiler check that the
boiler has been installed in accordance with
these instructions, and the integrity of the

flue system and the flue seals, as described

in the flue installation section.

IMPORTANT:
Also refer to the commissioning check list

attached to the front of the boiler.

6.1 GAS SUPPLY INSTALLATION

Inspect the entire installation including the

gas meter, test for soundness and purge, all

as described in BS 6891.
In Ireland refer to IS 813:2002.

6.2 ELECTRICAL INSTALLATION

Prelim inary electrical systems checks to

ensure electrical safety shall be carried out

by a competent person.
ALWAYS carry out the preliminary electrical
system checks:
i.e. earth continuity, polarity, resistance to
earth and short circuit, using a suitable test
meter.

Fig. 33

Fig. 34

5.28 EXTERNAL CONTROLS

IMPORTANT:

Electricity supply must be as specified in

clause (sect. 4.22).

- When controls external to the appliance are
required, design of the external electrical
circuits should be undertaken by a

competent person. In accordance with the

IEE wiring regulations.

It is essential that all external controls
are VOLT FREE.

Factory fitted internal wiring must not be
disturbed when wiring external controls.

- To gain access to the electrical box remove
the front panel of the case as described in
clauses sect.

8.2.
You can slide towards the top the
instrument panel box and push the retaining
latches and remove the instrument panel
(sect. 8.24).

- Heat resistant flexible cable is fitted
between the isolator and the terminal block
which is a 3 core cable of 0.75 mm2 (24x0,2
mm) to BS 6500.

Make sure all wires to the appliance are
routed away from sharp edges and hot
surfaces.
The cable must be fastened with its cord
anchorage and connected so that it should
make the cable slip from the anchorage until
the current carrying conductors become taut
before the earthing conductor.
Securely tighten all terminal screws and
arrange the cable with slack between the
cord anchorage and the terminal block.

40

6.3 INITIAL FILLING OF THE SYSTEM

Open central heating flow and return valves

Unscrew the cap on automatic air release valve
positioned on the top of the pump housing one
full turn (leave open permanently).

- Close all air release taps on the central
heating system. Press the info button to
display the current pressure (code E08 will
display if the pressure is nil/too low).

- Gradually open stopcock at the filling point
connection to the central heating system
until water is heard to flow.

- Starting with the lowest radiator open each
air release tap in turn. Close when the
water is clear, free of bubbles and flows
out. In the same way release air from any
high points in the pipework.

- Continue filling the system until 1.5 bar

register on digital display. Press the ESC
button once again to return to the main
screen.

Then turn off the filling points stopcock.

- Inspect the system for water soundness

and remedy any leaks discovered.

6.4 SETTING THE HEATING SYSTEM DESIGN
PRESSURE

The design pressure must be a min. 1bar

and max. 1.5 bar. These figures are read
on the digital display by pressing the INFO
button.

The actual reading should ideally be 1 bar +

the height in metres to the highest point of
the system above the base of the
appliance (up to max of 1.5 bar).

N.B.: The safety valve is set to lift at

3 bar (30 m/42.5 psi).

To lower the system pressure to the

required value unscrew the drain
point (fig. 36) or drain on the heating
circuit.

6.5 FILLING THE HOT WATER SYSTEM

Close all hot water draw-off taps.

Open the cold water inlet cock.
Slowly open each draw-off tap until clear water

is discharged.

6.6 LIGHTING THE BOILER

Before lighting the boiler make sure that

the heating circuit flow and return valves are
open and also that the cold water input cock
is open.

- If external controls are installed (

E.g. time
clock and therm ostat) make sure that they
are calling for heat.

- Select winter function, the winter icon in
digital display will be flashing (item 3 fig.

2).

- To select the minimum heating temperature
press the radiator button.

IMPORTANT:
Before lighting the boiler select the minimum

central heating temperature. This must be left
at minimum for approx 5 mins to purge air
safely from the boiler.

Fig. 36

Fig. 35

- To select the minimum heating temperature
press the radiator button.

- Press arrow up and arrow down buttons to
adjust.

- The digital display shows the current set
temperature in central heating.

- After a few seconds the digital display shows
the central heating temperature in demand
(CH icon flashing, item 3 fig. 2).

- The fan starts and after a few seconds or
so the digital led display will show that the
ignition has commenced.

- NOTES: Put the digital clock in demand

position.

41

IMPORTANT: Do not insert the analyser

probe into the sample point immediately
or leave in long periods. This will prevent
saturation of the analyser.

During the calibration function the

combustion ratio may increase for a
short time while the boiler performance is
optimised.

The person carrying out a combustion
measurement should have been assessed

as competent in the use of a flue gas

analyser.

The flue gas analyser used should be one

meeting the requirements of BS7927 or BS­EN50379-3 and be calibrated in accordance
with the analyser manufacturer ’s
requirements.

Fig. 37

ELECTRODES POSITION

Anti-clockwise to increase CO2.
Clockwise to decrease CO2.
After any new regulation wait to stabilise
for about one minute.
Replace the front cover.

TABLE 9

- The ignition control will automatically make
three attempts to start, if it doesn’t start this

may be due to air in the gas supply line.
If the burner fails to light, the digital led
display and fan will stop, and the display will
show the lockout code (E01 depicts flame
failure).

- If necessary push the boiler Reset button
(item 2 fig.1) and the boiler will restart
automatically.

- After the boiler has lit, allow to warm at
minimum temperature setting to purge any
air from the system.

- Once the system has been purged of air,
set the heating temperature to the desired
setting.

6.8 CHECK THE GAS PRESSURE

Check the gas mains pressure at the gas
valve inlet pressure test point (fig.35) with the
boiler operating at full rate.
Check with the Local Gas supplier if the
pressure differs significantly from 20 mbar
G20 (natural gas), 37 mbar G31 (propane).
With leak detection fluid test for gas tightness

of all gas components and joints.

IMPORTANT:
The Gas Valve Throttle adjuster is required
to be sealed with tamper proof paint after
adjustment (fig. 35).

6.9 COMBUSTION CHECK

Check all gas carrying components along with,

the combustion of the appliance which should

be checked as follows.
Remove the front panel of the appliance.
Ensure the boiler and external controls are

calling for heat. Turn on the electrical supply.

open the hot water tap at maximum flow rate.

Wait at least five minutes or until the unit has

reached its operating temperature.
Unscrew the test sample screw on the boiler

elbow bend (item 60 fig. 10). Measure the level

of CO2. Check the reading against the
corresponding value in table 9.

It is essential that this test is repeated with

the casing on as this will check the integrity

of the flue.

If adjustment proves necessary then proceed

as follows.

IMPORTANT: Any adjustment to the gas
valve should only be carried out by a
qualified person.
Referring to the table 9, adjust the
maximum level of CO2 with the Throttle
using a 2.5 mm hex on the gas valve

(fig.35).

Once the process of commissioning the boiler is complete, the

commissioning engineer MUST complete the relevant section in the Benchmark log book.

ATTENTION

IT IS A CONDITION OF THE MANUFACTURERS WARRANTY THAT THE BENCHMARK

COMMISSIONING CHECKLIST IS FULLY COMPLETED AND LEFT WITH THE APPLIANCE

6.10 CHECKING THE FLUE SYSTEM

The flue system should be visually checked for

soundness. Check all connections and fixings
are secure and tight.

6.11 CHECKING THE HEATING THERMOSTAT

Allow the system to warm up and then select

the C.H thermostat to ensure the main burner
modulates from “high” to “low” and “low”
to “off” and vice versa (scale range covers
approx. 35 °C - 80 °C, sec 1.5 key 5 to set
heating temperatures).

6.12 TESTING AND REGULATING THE
DOMESTIC HOT WATER SYSTEM
FLOW AND CHECK THE OPERATIONAL
(WORKING) INLET PRESSURE

Set up the boiler to operate at maximum rate

by opening the hot tap to maximum flow.
With the boiler operating at the maximum
rate check the operational dynamic (working)
gas pressure test complies with the
requirements.
Ensure that this inlet pressure can be
obtained with all other gas appliances in the
property working.

Put the appliance in summer position (item1

fig. 1).

- Open a domestic hot water tap (preferably

the bath tap). Ensure the cold water inlet
stopcock is open and the DHW is set at
maximum, press the arrow up (item 3 fig.

1) the digital display shows the set

temperature, if necessary adjust with
arrow up and arrow down buttons.

- After a few seconds the digital display

shows water temperature in demand
(D.H.W. icon flashing, item 10 fig. 2).

- If the boiler does not light check that the
water flow rate is above the min. required to
operate the differential pressure 2.8 L/min.
(0.61 gals/min).

- The temperature of the water will depend
on the rate at which it flows. If, due to high
water pressure, the flow rate is too high
(and the temperature too low for practical
use) the flow rate may be adjusted.

It is better to set for the lowest acceptable

temperature preferably at the bath tap since
the user can gain higher temperatures at
other restricted flow taps.

- If the cold supply is subject to large
fluctuations or is above the permitted max.
water pressure, a suitable pressure/flow
regulator should be fitted on the cold water
supply to the appliance.

- Slowly close the draw off tap to reduce the
flow rate to the min (approx. 2.8 L/min).

- Select a different temperature for DHW. to
ensure it operates at its various setting.

- Close the draw-off tap still further. The
burner should stop when the rate falls below
about 2.8 L/min (0.61 gals/min).

6.13 KEEP HOT

The boiler comes with an optional keep
hot facility.
This can be switched on

by a competent
person.
This will result in the boiler, at any time,
periodically firing to keep the water
within the boiler up to temperature to
reduce the time delay of hot water
delivered to any hot draw off point.

- Press INFO and arrow down buttons
together (item 6 and 4 fig. 1) for 5 seconds
to enter in USER PARAMETERS mode.

- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1), to select P003, and
press ENTER (item 1 fig. 1).

- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1) to select the followings
option: “0” disabled, “1” enable, adjust if
necessary and press ENTER (item 1 fig. 1)
to confirm.

6.14 C.H. HIGH/LOW TEMPERATURE

The boiler comes set, in Central heating,

at the 80°C flow temperature.
It is possible to adjust the max set-point to
max 50°.

- Press INFO and arrow down buttons
together (item 6 and 4 fig. 1) for 5 seconds
to enter in USER PARAMETERS mode.

- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1), to select P004.

- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1) to select the
followings option: “0” low temperature,
“1” hight temperature.

42

system, and to the building, in the event
of the system remaining inoperative during

frost conditions.

- Explain the function and the use of the
boiler, the summer/winter button, the

ON/OFF switch and the reset of the digital

display.

- Explain and demonstrate the function of the
temperature controls, radiator valves etc. for
the economic use of the system.

- If an external time clock is fitted, then draw
attention to ensure the boiler timer is left in
the manual position.

- Stress the importance of regular servicing
by a qualified Heating Engineer and that a
comprehensive service should be carried
out AT LEAST ONCE A YEAR.

- Fill in the Benchmark log book and leave
completed with the customer.

- Explain to the

user how to isolate the
appliance from the gas, water and
electricity supplies and the locations of

all drain points.

RATIO BETWEEN FAN SPEED
AND HEAT INPUT

Fig. 38

TABLE 10/A

TABLE 10/B

6.15 RANGE RATING CENTRAL HEATING
OR/AND DOMESTIC HOT WATER

The boiler comes set, in Central heating,
at the MID RANGE of its output.

The boiler has already been adjusted by the

manufacturer during production. If the
adjustments need to be made again, observe
the following procedures.
The adjustment to fan speed must be

strictly in the sequence indicated, by
qualified personnel only.

To check max fan speed, see tables 10/A
and 10/B.

Press INFO and arrow down buttons together
(item 6 and 4 fig. 1) for 5 seconds to enter in
USER PARAMETERS mode.

- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1) to select the
followings options:

- P001 CH max fan speed.

- P002 DHW max fan speed.

- Press enter (item 1 fig. 1) to
select CH or DHW fan speed.
Adjust if necessary.

6.16 TEST MODE

It is possible to activate the test mode by
USER PARAMETERS (see section 1.4) or
directly by pressing

the INFO and the
RESET buttons together (item 6 and 2 fi g. 1)
for 5 seconds.
Press the arrow up and the arrow down
buttons to set the maximum or minimum fan
speed.
The function is enabled for maximum 15
minutes.
Press RESET to esc test mode.

6.17 INSTRUCTING THE USER

After completion of the installation and
commissioning of the system, the installer
should hand over to the householder by
taking the following actions:

- To the Householder explain his/her

responsibilities under The Gas Safety
(Installation and Use) Regulations

1998.

- Explain and demonstrate the lighting
and shutting down procedures.

- Show the user the location of the filling
valve and how to top-up the system
pressure correctly.

- Explain the operation of the boiler
including the use and adjustment of
ALL system controls which should be
fully explained to the householder. This
will ensure the optimum fuel economy
for the household requirements of both
heating and hot water consumption.

Advise the User of the precautions
necessary to prevent damage to the

43

44

7 SERVICING INSTRUCTIONS

Ravenheat is a member of the Benchmark
initiative and fully supports the aims of the
programm e.
Benchmark was instructed to improve the
standards of installation and commissioning
of central heating systems in the UK and
to encourage the regular servicing of all
central heating systems to ensure safety and
efficiency.

During routine servicing, and after any
maintenance or change of part of the
combustion circuit, the following must be
checked:

- The integrity of the flue system and the
flue seals.

- The integrity of the boiler combustion
circuit and the relevant seals.

- The operational dynamic (working) gas
inlet pressure at maximum rate.

- The gas rate.

- The combustion performance (Refer to
page 65).

- Check all joints and connections in the
appliance and remake any that show signs
of leakage.

NOTE:

Service consumables are not covered by
the warranty.
To view warranty exclusions please visit
www.ravenheat.co.uk
or contact us on 01132 527007.

COMPETENCE TO CARRY OUT THE CHECK
OF COMBUSTION PERFORMANCE.

Please note: BS6798:2009 Specification for
installation and maintenance of gas-fired
boilers of rated input not exceeding 70 kW
net advises that:

- The person carrying out a combustion
measurement should have been assessed
as competent in the use of a flue gas
analyser and the interpretation of the
results.

- The flue gas analyser used should be one
meeting the requirements of BS7927 or
BS-EN 50379-3 and be calibrated in
accordance with the analyser
manufacturers requirements.

- Competence can be demonstrated by
satisfactory completion of the CPA1 ACS
assessment which covers the use of
electronic portable combustion gas
analysers in accordance with BS 7967,
Parts 1 to 4.

7.1 BOILER FROST PROTECTION

The appliance has a built in frost protection
device that protects the boiler from freezing.
With the gas and electric supplies ON and
irrespective of any room thermostat setting, the
frost protection device will operate the pump
when the temperature falls below 10 °C and
will operate the burner when the temperature
falls below 5°C.
The burner will switch off when the temperature
reaches 27 °C. When the frost protection
device operates “AF” is displayed on the digital
display.

IMPORTANT NOTE:

The system should be protected by incorporating
a system frost thermostat.

To ensure continued efficient operation of
the appliance it is necessary to carry out
servicing and cleaning at regular intervals.
The frequency of servicing and cleaning will
depend upon the particular installation
conditions and usage but in general, once a
year is advisable.

WARNING:

Before the start of any servicing or
replacement of components always
isolate the electricity supply to the
appliance and always turn off the
appliance gas supply at the gas
service cock.

The data badge is positioned low on the
inside left panel.

- The following notes apply to the appliance
and its controls but it should be remembered
that attention must also be paid to the heating
and hot water circuits with special attention to
radiator valves, thermostats, clocks, leaking
hot water taps etc.

- Where it is necessary to replace a gasket that
relies on adhesive for securing - this adhesive
will be supplied with the gasket as a spare
item.

- In all cases prior to servicing, remove the front
panel of the case. Operate the appliance by
turning the hot water services on to a high
water flow. Measurement of the products of
combustion can be achieved by connection
of a probe to the combustion analyser test
point.

Com bust ion test ing must be carr ied out by comp eten t pe rson

usin g a comb usti on a naly ser conf ormi ng t o BS7927 .

- IMPORTANT NOTE:

After completing any servicing or
replacement of gas carrying components
it is essential that a test for gas soundness
is always carried out along with functional
checks in operation.

7.2 TO INSPECT AND CLEAN THE
APPLIANCE

Before carrying out the cleaning

operation, cover the electrical control
panel with a piece of waterproof material
to protect it from debris.

Inspect the heat exchanger for any
blockage. Deposits of any material should
be brushed away using a soft brush.

NOTE: Do not use brushes with metallic
bristles.

Examine internal pipe-work connections
and automatic air vent for any water leaks

and rectify if necessary.

Examine and remove loose debris from
the combustion chamber using a soft
brush and vacuum cleaner.

Carefully flush, by spraying water at any
remaining debris through the condensate
trap.
(Ensure the water is kept away from
electrical components).

It is important to verify that the
drip-plate with drain trap contains
water (this check is particulary
important if the boiler has not used for
extended periods of time).
If necessary, the drip plate can be filled
using the trap provided (Fig. 49).

Examine the spark and sensing electrodes

for any mechanical damage. Clean away
any debris and check the spark and
sensing gap.

Examine flue duct and flue manifold and

ensure that there is no obstruction.
Examine the gasket at the entry into the
flue manifold.

It is essential that a good seal is made at

the outlet to the flue manifold, renew this
gasket if there is any sign of damage or
deterioration.

45

46

8.4 TO REMOVE/REPLACE FAN
(Fig. 41)

Remove the front panel (fig. 39).

Unscrew the gas pipe nut and remove
the retaining clip. Detach the connectors
from the fan.
Unscrew the four screws that fix the fan

and remove only in front screws.
Pull forward the fan.
Replace in reverse order (always fitting a

new gasket).

8.3 TO REMOVE LEFT AND RIGHT
PANELS (Fig. 40)

Remove the front panel (fig. 39).
Unscrew the four screws to the bottom

panel.

Unscrew the two screws to the side panel

and pull.

Fig.40

Fig.41

Fig. 39

8 REPLACEMENT OF PARTS

8.1 GENERAL

Replacement of parts must be carried
out by a competent person.

Before replacing any parts the boiler should

be isolated from the mains electric supply
and the gas should be turned off at the
service cock on the boiler.

After replacing any parts always test for

gas soundness and if necessary carry out
functional test of the controls.

For replacement of parts, the front, and
bottom panels of the boiler will need to be
removed (it is not necessary to remove the
side panels as all parts are accessible from
the front or beneath the boiler).

8.2 TO REMOVE THE BOILER PANELS

To remove the front panel unscrew the two

lower screws that secure the front panel to
the boiler and lift off.

47

8.5 TO REMOVE/ REPLACE THE
ELECTRODES (Fig.37)

Remove the front panel (fig. 39).

Remove the ignition and/or sensing lead
plug.
Unscrew the securing screws with a

TORX T15 screwdriver and put them into
a suitable container so that they don’t get

lost.
Withdraw the Spark electrode and/or
Sensing electrode carefully from the burner

cover being careful not to damage the

seal.

Replace with a new electrode in reverse

order. Ensure the gap is correct and there

is a good seal when replaced (always

fitting a new gasket).

8.6 TO REMOVE/REPLACE THE BURNER
(FIG.42)

Remove the front panel (fig. 39).

Unscrew the gas pipe nut and remove
the retaining clip. Detach the connectors
from the fan.
Unscrew the four screws that fits the burner

door to the heat exchanger and remove it.

Remove the electrodes (sect. 8.5), and

remove the insulation pad, is helpful to use

a screwdriver to move the fastening clips.
To remove the burner, unscrew the screws
with a TORX T15 srewdriver.
Replace in reverse order.

Fig.42

8.7 TO REMOVE/REPLACE THE MAIN HEAT
EXCHANGER

Remove the front and bottom panels
(fig. 39-40).
Drain the boiler CH circuit and drain the
DHW circuit. Follow the instructions to

remove the burner (sect. 8.6). Pull down to
remove the condense pipe on the bottom
of the heat exchanger. Disconnect the flow
and return pipes at the heat exchanger.

Loosen the four heat exchanger securing
screws and clamps then carefully ease the
heat exchanger out.

CAUTION : There will be water in the heat
exchanger.

Replace in reverse order, always use new
O-ring seals.

48

Fig.44

Fig.43

8.8 TO REMOVE/REPLACE EXPANSION
VESSEL (Fig.43)

Remove the front and bottom panels
(fig. 39-40).
Close the on/off valves for the heating
circuit and drain the water at the drain
point (fig.36). Unscrew the fixing
bracket and the nut connecting the
expansion vessel. Lift up the vessel
and remove.
Replace in reverse order. Use a new
gasket, taking care to ensure they are
replaced correctly.

8.9 TO REMOVE/REPLACE GAS VALVE

(Fig. 44)

Remove the front and bottom panels
(fig. 39-40).
Unscrew the nut at the top and the four

screws on the bottom of the gas valve.

Replace in reverse order.

IMPORTANT:
when the gas valve is re-fitted, check

combustion CO2 and adjust if
necessary (see section 6.9).

8.10 TO REMOVE/REPLACE PLATE HEAT
EXCHANGER (Fig. 44)

Remove the front and bottom panels

(fig. 39-40).
Remove the panel control box (sect.

8.22).

Close off the on/off valves for CH circuit
and DHW circuit and drain the boiler and
drain hot water from the lowest hot water
tap.

Unscrew the two allen screws that
connect the DHW heat exchanger and
pull it out from the boiler (fig. 46).
If necessary the pipes from the flow
manifold may have to be removed for
easier access. Lift up the plate heat
exchanger.
Replace in reverse order.
NOTE: Always use new O-rings.

8.11 TO REMOVE/REPLACE THE WATER
PRESSURE SWITCH (Fig. 46)

Remove the front and bottom panels
(fig. 39-40).

Close the on/off valves for the heating
circuit and drain the water at drain point
(fig.36).
Detach the wire connector, remove the
securing clip.
Replace in reverse order.

Fig.45

8.12 TO REMOVE/REPLACE DIVERTER

VALVE MOTOR (Fig. 46)

Remove the front and bottom panels
(fig. 39-40).
Detach the electrical plug and remove the
retaining clip. Replace in reverse order.

8.13 TO REMOVE/REPLACE C.H.
DIVERTER VALVE (Fig. 46)

Remove the front and bottom panels
(fig. 39-40).
Remove the panel control box (sect.

8.222). Close the on/off valves for the
heating circuit and drain the water at drain
point (fig.46).

Remove diverter valve motor switch, to

allow access and unscrew the C.H.diverter

valve (fig.47).
Replace in reverse order.
NOTE: Always use new O-ring.

8.15 TO REMOVE/REPLACE PUMP (Fig.47)

Remove the front and bottom panels

(fig. 39-40).
Close the on/off valves for the heating

circuit and drain the water at drain point
(fig.36).

Detach the supply wire connector from the

pump.

Unscrew the nut that fastens the pump to

the CH pipe and remove the pump and

remove the securing clip at the pump

manifold.

Replace in reverse order.
NOTE: Always use new O-ring.

8.16 TO REMOVE/REPLACE AUTOMATIC
AIR VENT (Fig. 47)

Remove the front and bottom panels

(fig. 39-40).

Remove the panel control box (sect. 8.22).
Close the on/off valves for C.H. circuit and

drain the water from at drain point Fig.36.

Remove the clip and pull the automatic air

vent from the pump.
Replace in reverse order.
NOTE: Always use new O-ring.

8.14 TO REMOVE/REPLACE D.H.W.
DIVERTER VALVE MECHANISM
( Fig. 46)

Remove the front and bottom panels
(fig. 39-40).
Remove the panel control box (sect. 8.22).

Close the on/off valves for the heating
circuit and drain the water at drain point
(fig.36).

Remove flow detector and unscrew DHW

diverter valve.
Replace in reverse order.
NOTE: Always use new O-ring.

49

Fig.46

Fig.47

8.17 TO REMOVE/REPLACE SAFETY RELIEF
VALVE (Fig. 46)

Remove the front and bottom panels
(fig. 39-40).
Close the on/off valves for C.H. circuit and

drain the water from at drain point fig.36.

Unscrew the safety relief valve screw and

pull up.

Replace in reverse order and using a new

gasket.

8.18 TO REMOVE/REPLACE D.H.W. SENSOR

(Fig. 46)
Remove the front and bottom panels
(fig. 39-40).
Close the on/off valve for the DHW circuit

and drain the hot water from the lowest hot
water tap.

Detach the wire connector and unscrew the

sensor.
Replace in reverse order.

8.19 TO REMOVE/REPLACE C.H. FLOW AND
RETURN SENSORS (Fig. 48)

Remove the front panel (fig. 39).

Detach the wire connector and remove

the retaining clip sensor from the pipe.
NOTE: When reconnecting ensure the
correct wires go to the relevant sensor

(the polarity on each one is unimportant).

8.20 TO REMOVE/REPLACE FLUE SENSOR
(Fig. 3 item 23)

Remove the front panel (fig. 39).

Detach the wire connector and

rotate the sensor.

Replace in reverse order.

Fig.48

8.21 TO CLEAN AND REMOVE/REPLACE
CONDENSING TRAP (Fig. 49)

Remove the

front panel (fig. 39), bottom

and left side panels (fig. 40).
Remove the securing clip and pull
out the plastic pipe that connects the
condensing trap at the heat exchanger.
Unscrew the nut that fastens the
condensing trap to the depression
chamber and remove it.
If the side panel can not be removed then

remove the gas valve (see sec 8.9) and

continue with the above instructions.
Replace in reverse order.

50

Fig.49

Fig.53

Fig.51

8.22 TO REMOVE PANEL CONTROL BOX
(Fig. 50,51).

Remove the

front panel (fig. 39).
Pull the control panel box until it is
slightly out of the boiler.
As doing so move the box forward
until the control box becomes free.
This will allow free access to lower
part of the boiler.

Fig.52

51

Fig.50

8.23 TO REMOVE/REPLACE CONTROL
BOARD (Fig.52).

Remove the front panel (fig. 39).

Remove the the panel control box (sect.

8.22).
Detach all connectors from control board,
unscrew the four screws and lift up.

Replace in reverse order.

8.24 TO REMOVE/REPLACE DIGITAL
DISPLAY BOARD.

Remove the front panel (fig. 39).

Remove the panel control box (sect.

8.22), and let it fix at the depression
chamber like in fig. 52.
Unscrews the four screws that fix the
cover panel control box and lift up.
Detach all connectors from control board,
unscrew the four screws and lift up.

This will allow free access to digital
display. Detach the connector and
unscrew the four screws and lift up.

Replace in reverse order.

8.25 EXTERNAL CONTROL CONNECTION
(Fig. 53)

Remove the front panel (fig. 39).
Remove the external wire link on the
panel control box.
Replace with external wire controls.

(These must be volt free).

9 FAULT FINDING CENTRAL HEATING

Before trying to operate the boiler make sure that: all gas supply cocks are open and the gas supply has been

purged of air. The heating system pressure is at least 1 bar min to 1.5 bar max, select winter position on the
digital display and set the central heating temperature to maximum. (sect. 1.5).
Ensure external controls are calling for heat (room thermostat/ digital clock) and check the following appliance
operations:

52

53

9.1 FAULT FINDING DOMESTIC HOT WATER

Before continuing see section 9, and after selecting the summer position on the digital display and setting

the domestic hot water temperature to maximum (sect.1.5).
Open the domestic hot tap and check the following appliance operations:

10 ELECTRICAL SYSTEM DIAGRAM

54

Fig. 55

55

11 SPARE PARTS

Fig. 56

56

Pos. Part. No. G.C.

Part. No.

Description

1 CIR150200 Control board

2 FUS010150 Internal fuse 3.15 A

3 SCA190050 Control board box with panel instrument

4 CIR190100 Digital display

5 SCA190050 Instrument panel with control board box

6 GUA010310 1” gasket (GUA010311)

7 CIR150270 Pump

8 ORI150150 Pump O-ring

9 FOR150200 Pump clip

10 ORI110450 Plate heat exchanger O-ring

11 SCA150150 HE 25 S plate heat exchanger

11.1 SCA150200 HE 30 S plate heat exchanger

12 GRU160100 Return manifold

13 FOR150250 Water pressure transducer clip

14 TRA150100 Water pressure transducer

15 VAL150100 Safety relief valve

16 TUR150050 Turbine

17 RIV150050 Flow detector switch

18 GRU160060 Flow manifold

19 OTT150050 Diverter valve by-pass

20 SON150050 Safety relief valve pipe

21 FOR150150 Diverter valve motor clip

22 MOT150050 Diverter valve motor

23 TUB160080 Flow pipe

24 SON110100 C.H. FLOW and return sensors (SON110150)

25 TER130050 Overheat thermostat

26 ORI110250 Primary heat exchanger O-ring

27 MOL160050 Primary heat exchanger clip

28 TUB160140 Return pipe

29 RAC190050 Condensing trap

30 TUB110150 Flexible condensing pipe (TUB110300)

31 FAS150050 Condensing trap pipe hose clamp 12-22

32 TUB160050 Condensing pipe

33 SON130050 Temperature fl ow sensor

34 VAL150300 Gas valve

35 GUA010260 3/4” gas valve gasket

36 TUB160180 Gas valve inlet pipe

37 ORI160050 Air/gas mixer junction O-ring

38 FOR150100 Air/gas mixer junction clip

SHORT LIST OF SPARE PARTS AND FLUE ACCESSORIES

57

Pos. Part. No. G.C.

Part. No.

Description

39 SIL150050 Silencer

40 MIX150050 HE 25 S air/gas mixer

40.1 MIX150150 HE 30 S air/gas mixer

41 ORI110050 Air/gas mixer - fan O-ring

42 VEN160050 Fan

43 GUA110052 Fan - burner gasket

44 BRU160100 Burner

45 GUA150050 Sensing/spark electrode gasket

46 CAN160100 Sensing electrode

47 CAN160050 Spark electrode

48 SCA160100 Main heat exchanger

49 VAS150050 Expansion vessel

50 GUA010050 1/4” gasket

/ IMP160100 Wiring harness

Part. No. Description

TER160050 1 metre high plume kit
CUR110050 45° fl ue exhaust defl ection bend
CUR110100 90° fl ue exhaust defl ection bend

Plume Management Kit (see sect. 5.6)

Accessories concentric flue 60/100 (see sect. 5.12 - Table 7)

Part. No. Description

COL160050 Straight fl ue header / sample point 60/100
FLA110050 Flue adaptor
PRFE Flue Extension 60/100 L1000
PR45FBI 45° bend 60/100
PR90FBI 90° elbow bend 60/100
TER160050 Horizontal terminal 60/100
TER110200 Vertical fl ue Terminal

Accessories concentric flue 80/125 (see sect. 5.18)

Part. No. Description

COL160050 Straight fl ue header / sample point 60/10
PRO110300 Flue Extension 80/125 L1000
RID110050 125/80 to 100/60 Flue reducer
CUR110250 45° bend 80/125
CUR110300 90° elbow bend 80/125
TER010050 Horizontal Flue Terminal 80/125
TER110200 Vertical Flue Terminal 80/125
TEG060050 Flashing sleeve/slate

Accessories eccentric flue 80/80 (see sect. 5.13 - 5.14 - 5.15 - 5.16 - 5.17)

Part. No. Description

SDO160050 Twin fl ue header F80/80
PRO110200 Straight pipe L1000 80
CUR110150 90° elbow bend 80
CUR110200 45° bend 80
GRI110050 Air inlet terminal 80
GRI110100 Exhaust terminal 80
TER060110 Vertical eccentric fl ue terminal

58

COD 0017LIB19005/0 04/2018

Chartists Way, Morley, Leeds, U.K. LS27 9ET

Telephone: [phone]
Fax: [phone]
Website: www.ravenheat.co.uk
E-mail: [e-mail]

Ravenheat reserves the right to make changes and

improvements in our products which may aff ect the accuracy

of the information contained in this leafl et.

For assistance please call Ravenheat technical helpline:
telephone: [phone]
fax: [phone]
e-mail: [e-mail]

12 BENCHMARK COMMISSIONING CHECKLIST DETAILS

Boiler Page Page

Make and model ………………………………………14/17 Burner operating pressure............... ......................n/a

Appliance serial no. on data badge………..Left side panel Central heating fl ow temp……. .. measure and record

Controls Central heating return temp… ….measure and record

Temperature control to heating…………...................…12 For combination boilers only

Temperature control to hot water…………...............….12 Scale reducer………………………………..................25

Heating zone valves……………………………………..n/a Hot water mode

Auto by-pass………………………………………………22 Max. operating burner pressure….measure and record

Boiler interlock…………………………………….……....22 Max. operating water pressure…...measure and record

Cold water inlet temp…………….. measure and record

For all boilers Hot water temp……………………. measure and record

Flushing to BS7593………………………………...…….24 Water fl ow rate at max. setting…...measure and record

Inhibitor…………………………………………………….25 For condensing boiler only

Central heating mode Condensate drain………………………………......38/39

Heat input………………………………….to be calculated For all boilers: complete, sign & hand over to the customer.

60

61

62

63

www.centralheating.co.uk

Benchmark Commissioning and
Servicing Section

64

FLOWCHART FOR CO LEVEL AND COMBUSTION RATIO

CHECK ON COMMISSIONING A CONDENSING BOILER

65

12.1 ANALYSER CHECK LIST

It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed.

Service Provider

SERVICE RECORD

SERVICE 01

AND

AND

SERVICE 02

AND

AND

SERVICE 03

AND

AND

SERVICE 04

AND

AND

SERVICE 05

AND

AND

SERVICE 06

AND

AND

SERVICE 07

AND

AND

SERVICE 08

AND

AND

SERVICE 09

AND

AND

SERVICE 10

AND

AND