
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.: 0113 252 7007 - FAX: 0113 238 0229
Website: www.ravenheat.co.uk - E-mail: sales@ravenheat.co.uk
Instructions for Use
Installation and Servicing
To be left with the user
CS 80 (T)
Natural Gas (G20) II
2H3P
G. C. No. 4758146
LPG (G31) II
2H3P
G.C. No. 4758147
CS 90 (T)
Natural Gas (G20) II
2H3P
G. C. No. 4758148
LPG (G31) II
2H3P
G.C. No. 4758149
1312
HIGH EFFICIENCY
CONDENSING
COMBINATION BOILER

EFFICIENCY CONDENSING BOILER
EFFICIENCY CONDENSING BOILER
FOR CENTRAL HEA TING AND DOMESTIC HOT W ATER
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. T elephone No (0113) 252 7007.
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.
-
- Variable head pump suitable for any type of central heating system.
- Variable head pump suitable for any type of central heating system.
- Burner with fl ame stabiliser designed to operate under all thermal conditions.
- Burner with fl ame stabiliser designed to operate under all thermal conditions.
condensing heat exchanger
condensing heat exchanger
for high thermal fl ue transfer from gases to water.
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.
- Stainless steel plate heat exchanger for super high heat transfer to domestic hot water supply.
- Built in frost protection.
- Built in frost protection.
- Printed circuit board designed to connect to room stat and/or timer.
- Printed circuit board designed to connect to room stat and/or timer.
- Aesthetically pleasing panels and controls.
- Aesthetically pleasing panels and controls.
- On/Off ball valves for shutting off gas, central heating and domestic hot water circuit.
- On/Off ball valves for shutting off gas, central heating and domestic hot water circuit.
- Safety relief valve (for safety discharge).
- Safety relief valve (for safety discharge).
- Programmable 7 day module with digital display (time clock version only).
- 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 SUBST ANCES
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 effort 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
Users instructions
Sections Page Sections Page
1 Users guide 6 5 Installation 25
1.1 Introduction 6 5.1 Warning 25
1.2 Clearances around the appliance 6 5.2 Delivery 25
1.3 Operating safety checks to protect 6 5.3 Unpacking of boiler 25
your appliance (checking the system 5.4 Positioning of the boiler 25
pressure) 5.5 Optional extras 26
1.4 Appliance status indicators 7 5.6 Plume management kit 27
1.5 Digital display 8 5.7 Installing the appliance for rear flue 28
1.6 Boiler value 8 outlet
1.7 Time 8 5.8 Installing the appliance for side flue 28
1.8 Programming the heating times 9 outlet
1.9 Diagnostic 9 5.9 Completing horizontal flue installation 31
5.10 Intake and exhaust terminal 31
components
2 General layout 10 5.11 In-line flue bend and flue extension 31
2.1 Operating scheme 11 5.12 Vertical flue instructions 32
2.2 Introduction 12 5.13 Installation instructions for twin flue 34
2.3 Description of control system and 12 pipe
sequence of operation 5.14 Twin flue instructions 34
2.4 Domestic hot water mode 12 5.15 Exhaust / suction system with 35
2.5 Central heating mode 12 concentric pipes for flat or sloping
2.6 General function 12 roofs.
2.7 Overall dimension 13 Extensions with two separate pipes
2.8 Safety device 13 5.16 Exhaust / suction system with two 35
2.9 Available pump head 13 separate rated 80 dia. pipes
2.10 Pressure drop across appliance 13 exhaust on flat or sloping roof, suction
from vertical wall
3 Technical data WH 80(T) natural gas 14 5.17 Exhaust / suction system with two 35
3.1 Technical data WH 80(T) LPG 15 separate pipes through a single
3.2 Technical data WH 90(T) natural gas 16 vertical wall
3.3 Technical data WH 90(T) LPG 17 5.18 Installation instructions for 80/125 36
concentric flue system
4 General requirements 18 5.19 Assemble boiler 37
4.1 Safety 18 5.20 Fitting valve pack 37
Gas safety (Installation and use) 5.21 Gas connection 37
4.2 General information 18 5.22 Central heating connection 37
4.3 Location of boiler 19 5.23 Domestic hot water connection 37
4.4 Clearances around the appliance 19 5.24 Position of water/gas connections 37
4.5 Important notice 19 5.25 Safety valve discharge 38
4.6 Gas supply 19 5.26 Condensate drain connection 38
4.7 Flue system 20 5.27 Converting the appliance to different 39
4.8 Air supply 20 gas types
4.9 Water circulation (central heating) 20 5.28 Electrical connections 39
4.10 Flue terminal position 21 5.29 Outdoor sensor 39
4.11 Pipework 22
4.12 Boiler interlock control 22 6 Commissioning 40
4.13 Draining tap 22 6.1 Gas supply installation 40
4.14 Air release points 23 6.2 Electrical installation 40
4.15 Mains water feed: central heating 23 6.3 Initial filling of the system 40
4.16 Permissible methods of filling 23 6.4 Setting the heating system 40
4.17 Sizing of additional expansion vessel 24 design pressure
4.18 Installation to an existing central 24 6.5 Filling the hot water system 40
heating system 6.6 Lighting the boiler 40
4.19 Water treatment 25 6.8 Check the gas pressure 41
4.20 Hard water areas 25 6.9 Combustion check 41
4.21 Domestic water 25 6.10 Checking the flue system 42
4.22 Electrical supply 25

5
Sections Page Sections Page
6.11 Checking the heating thermostat 42 11 Spare parts 55
6.12 Testing/regulating the D.H.W flow 42
6.13 Keep hot 42 12 Benchmark commissioning 60
6.14 C.H. high/low temperature 42 checklist details
6.15 Range rating central heating or/and 43 12.1 Analyser check list 65
domestic hot water
6.16 Test mode 43
6.17 Instructing the user 43
7 Servicing instructions 44
7.1 Boiler frost protection 44
7.2 To inspect and clean the appliance 45
8 Replacements of parts 45
8.1 General 45
8.2 To remove front panel 45
8.3 To remove left and right panels 46
8.4 To remove/replace spark igniter box 46
8.5 To remove/replace fan 46
8.6 To remove/replace the electrodes 47
8.7 To remove/replace the burner 47
8.8 To remove/replace the heat 47
exchanger
8.9 To remove/replace expansion 48
vessel
8.10 To remove/replace gas valve 48
8.11 To remove/replace plate heat 48
exchanger
8.12 To remove/replace the water 48
pressure transducer
8.13 To remove/replace diverter valve 49
motor
8.14 To remove/replace C.H. diverter 49
valve
8.15 To remove/replace D.H.W. diverter 49
valve mechanism
8.16 To remove/replace pump 49
8.17 To remove/replace automatic air vent 49
8.18 To remove/replace safety relief valve 50
8.19 To remove/replace D.H.W. sensor 50
8.20 To remove/replace C.H. flow and 50
return sensors
8.21 To remove/replace flue sensor 50
8.22 To clean and remove/replace 50
condensing trap
8.23 To remove panel control box 51
8.24 To remove the instrument panel 51
8.25 To remove/replace control board 51
8.26 To remove/replace digital display 51
board
8.27 External control connection 51
9 Fault finding Central heating 52
9.1 Fault finding Domestic Hot Water 53
10 Electrical system diagram 54

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-(2000).
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: 08001 11999
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.
Y our 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 affect 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
A minimum bottom clearance of 80 mm is
required between the appliance
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.
This appliance is designed to operate with the minimum
This appliance is designed to operate with the minimum
of ease for the user. All the controls are found on the
of ease for the user. All the controls are found on the
control panel on the front of the boiler.
control panel on the front of the boiler.
1.3 OPERATING SAFETY CHECKS TO PROTECT
1.3 OPERATING SAFETY CHECKS T O PROTECT
YOUR APPLIANCE (CHECKING THE SYSTEM
YOUR APPLIANCE (CHECKING THE SYSTEM
Before lighting the appliance check that the Central
Before lighting the appliance check that the Central
Heating system pressure is not less than 1 bar. If it
Heating system pressure is not less than 1 bar. If it
is below this it will be ecessary to re-pressurise the
is below this it will be ecessary to re-pressurise the
system, between 1 and 1.5 bar to allow the boiler to
system, between 1 and 1.5 bar to allow the boiler to
operate. To view the system pressure press the P button
operate. To view the system pressure press the P button
once, this will display the current pressure
once, this will display the current pressure
pressure is on nil or too low, then error code 08E is
pressure is on nil or too low, then error code 08E is
A fi lling device (fi lling loop) will have been fi tted on the
A fi lling device (fi lling loop) will have been fi tted on the
This is usually on the pipework near to the boiler. If you
This is usually on the pipework near to the boiler. If you
are unsure of its position, or you cannot identify it, consult
are unsure of its position, or you cannot identify it, consult
the installer who fi tted the boiler.
the installer who fi tted the boiler.
The fi lling loop usually consists of two taps and a
The fi lling loop usually consists of two taps and a
separate silver coloured braided fl exible pipe with
separate silver coloured braided fl exible pipe with
connection fi ttings. Only when re-pressurising should the
connection fi ttings. Only when re-pressurising should the
braided fl exible pipe be connected between the two taps,
braided fl exible pipe be connected between the two taps,
ensure that the nuts or the pipe ends are tightened
ensure that the nuts or the pipe ends are tightened
Fully open one of the taps fi rst and then while monitoring
Fully open one of the taps fi rst and then while monitoring
the water pressure on the digital display, carefully open
the water pressure on the digital display, carefully open
the second tap. When the water pressure is to a
the second tap. When the water pressure is to a
maximum of 1.5 bar turn both taps off.
maximum of 1.5 bar turn both taps off.
Disconnect the fl exible pipe from the taps (a small
Disconnect the fl exible pipe from the taps (a small
amount of water may be present).
amount of water may be present).
Keep the pipe in a safe place for future use.
Keep the pipe in a safe place for future use.
Press the P button once to return to the main screen.
Press the P button once to return to the main screen.
In the event of an error, the appliance will show a
In the event of an error, the appliance will show a
sequence code displayed on the digital display of the
sequence code displayed on the digital display of the
control panel (fi g. 1). By pressing the “RESET“
control panel (fi g. 1). By pressing the “RESET“
button it is possible to relight the boiler (see page 51
button it is possible to relight the boiler (see page 51
for list of error codes).
for list of error codes).
1 USERS GUIDE

7
1.4 APPLIANCE STATUS INDICATORS
Your boiler is equipped with a large LCD display
that indicates the appliance operating status
(fi g. 1).
After a long period switched off (no power
supply), the fi rst switch on the internal backup
circuit will charge in order to
and update parameters. The screen will display
and update parameters. The screen will display
CLOW, after a few minutes of power su
CLOW, after a few minutes of power supply the
display will be charged enough to allow all the
functions.
Fig. 1
During the initial charge time, the display doesn’t
allow the visualisation and/or modifi cation function
parameters. Instead other functions are working.
When the appliance operates in rest mode, the
display shows the boiler temperature and, for the
time clock version only, the time. Alternatively the
digital display also shows the water pressure.
KEY :
1 - ON/OFF button.
Press to turn the boiler ON, “SUM” (hot water
only) “WIN” (hot water and heating if set) and
OFF.
Press the button also to confi rm selections.
2 - Press to reset the appliance if ever an error
code is displayed.
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 domestic set-point
temperature.
Press also to show the boiler values or to
show the options program when the digital
display is in menu setting.
5 - Press to set the Central Heating
Temperature required
(when in winter mode).
Press the arrow up or the arrow down buttons
to increase or decrease the temperature.
6 - Press to set the Domestic Hot Water
Temperature required.
Press the arrow up or the arrow down buttons
to increase or decrease the temperature.
7 - TIMER MODE (time clock version only).
Press to select “Auto” (heating times set), “Manual”
(heating on all the time) and off (heating off).
8 - Press to show the boiler values.
Use the arrow up and arrow down buttons to select
the following information:
PBAR: water pressure
SFAN: speed fan (the display shows 3 digits
(e.g. 500 = 5000 rpm)
TFLOW: fl ow temperature
TRET: return temperature
TDHW: domestic hot water temperature
PWR: % power of modulation.
- Press for 3 seconds to enter into menu.
Use the arrow up or arrow down buttons to select
the following options:
- TIME (time clock version only): 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.
- PTMR (only time clock version): It is possible to set
the timer, see section 1.8.
- BOIL: It is possible to set the boiler parameters
C.H. max fan speed
D.H.W. max fan speed
Keep hot: “0” disabled and “1” enabled
C.H. High/Low temperature: “1” high/“2” low.

8
1.6 BOILER VALUE
It is possible to show the boiler value.
Press P button to show the boiler value.
Use the arrow up and the arrow down
Use the arrow up and the arrow down
buttons, (item 3 and 4 fi g. 1) to show the
following info:
PBAR: water pressure
SFAN: speed fan
TFlow: fl ow temperature
TRet: return temperature
TDHW: domestic hot water temperature
PWR: % power of modulation.
1.7 TIME (
time clock version only)
SETTING THE TIME AND DAY
(time clock
version only):
1. Press and hold the P button for 4 seconds.
2. Press the up and down arrows to select
“TIME” and then press the enter button.
3. Press the up and down arrows to select the
current hour (24h). Then press the enter
button.
4. Press the up and down arrows to select the
current minute and then press the enter
button.
5. Press the up and down arrows to select the
current day (1=Mon, 2= Tue etc.) and then
press the enter button.
The time is now set.
KEY
1 - Day indicator:
(time clock version only)
2 - Time (time clock version only).
2 - Time (time clock version only).
3 - Central Heating: when the appliance
3 - Central Heating: when the appliance
is in central heating mode icon 3 will be
is in central heating mode icon 3 will be
4 - Auto (time clock version only): when the
4 - Auto (time clock version only): when the
digital clock is in automatic function icon 4
digital clock is in automatic function icon 4
5 - Water pressure: Shows the current
5 - Water pressure: Shows the current
6 - Manual: When the digital timer is set to
6 - Manual: When the digital timer is set to
manual icon 6 is displayed, in this mode the
manual icon 6 is displayed, in this mode the
central heating is on permanently.
central heating is on permanently.
1.5 DIGITAL DISPLAY
Fig. 2
7 - ON/OFF: When the appliance is
ON icon 7 is displayed.
8 - Modulation fl ame level: When the burner is lit, 3
different levels on icon 8 are displayed.
9 - Day function (
time clock version only).
10 - Temperature.
11 - Anomaly - Lock - out - Test function.
12 - Domestic hot water: when the appliance is in
domestic hot water mode the icon will fl ash.

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 P button for 3 seconds.
2. Press the up and down arrows to select
“P TMR” and then press the enter button.
3. Press the up and down arrows to select the
individual day you wish to set, or select the
group of days (see table 2) then press the
enter button.
4. Press the up and down arrows to select the
ON1 time (fi rst on time) and press the enter
button.
5. Press the up and down arrows to set the
OF1 time (fi rst off) and press enter.
Repeat this process for the remaining 3
settings. (Note: if not all 4 times are required
then set the remaining on and off times to
24.00, this cancels the remaining on and off.
For example see the weekend settings in
(table 1.)
TABLE 1
TABLE 2
9
Once the times are set, press the P button and
this will return to the main screen.
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
For example, setting Mon-Sat will change all
these days but Sunday will remain the same as
table one unless changed individually.
The programmed times will only be activated
when the boiler is in winter mode (section 1.4
key 1) and also set in auto mode (section 1.4
key 7). If you wish to override these times, press
the timer mode button to select “MAN”, 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.
The display shows eventual error or faulty
The display shows eventual error or faulty
Stop boiler: The boiler stops the operating cycle
Stop boiler: The boiler stops the operating cycle
and waits for the disappearance of the cause of
and waits for the disappearance of the cause of
the error in order to go back to be operating
the error in order to go back to be operating
Block boiler: The boiler requires a manual reset
Block boiler: The boiler requires a manual reset
to become operational again.
to become operational again.

10
KEY
1 - Condensate trap
2 - Gas valve
3 - Gas inlet
4 - Drain point
5 - CH fl ow
6 - Diverter valve motor
7 - DHW outlet
8 - DHW sensor
9 - DHW flow detector
10 - DHW inlet
11 - Safety pressure relief valve
12-Water pressure transducer
13 - CH return
14 - Control board
15 - Circulation pump
16 - Automatic air vent
17 - Condensate drain
18 - Expansion vessel
19 - Main heat exchanger
20 - Spark electrode
21 - Sensing electrode
22 - Flue temperature sensor
23 - Spark igniter
24 - Fan
25 - Burner
26 - Manual air vent
27 - Overheat cut off thermostat
28 - CH flow sensor
29 - CH return sensor
2.0 GENERAL LAYOUT (Fig. 3)
Fig. 3

11
KEY
1 - Flue exhaust manifold
2 - Condensate drain
3 - CH return
4 - CH return sensor
5 - Heat exchanger
6 - CH fl ow
7 - Overheat cut off thermostat
8 - CH fl ow sensor
9 - Manual air vent
10 - Burner
1 1 - Spark electrode
12 - Sensor electrode
13 - Fan
14 - Flue
temperature sensor
15 - Expansion vessel
16 - Automatic air vent
17 - Circulation pump
18 - Water pressure transducer
19 - Safety pressure relief valve
20 - Diverter valve motor
21 - Plate heat exchanger
22 - DHW sensor
23 - Gas valve
24 - Gas service cock
25 - CH compression ball valves
26 - DHW flow sensor
27 - DHW compression ball valves
2.1 OPERATING SCHEME (Fig. 4)
Fig. 4

As the heating sensor reaches temperature
the fan speed modulates to maintain the
temperature set on the display panel.
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 unaffected by the anti-cycling
device.
2.6 GENERAL FUNCTION
The instrument panel permits regulation of the
boiler to partial heating requirements, between
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 in the heating
system. The boiler already carries connection
terminals for this thermostat, as well as for
a
external timer if required. The
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 C.H. 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 D.H.W. 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 summer/winter
button (item 1 fi g. 1).
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
It is possible to select either a summer or
With the summer position only being for
With the summer position only being for
The winter position being for central heating
The winter position being for central heating
with domestic hot water priority.
with domestic hot water priority.
DESCRIPTION OF CONTROL SYSTEM
DESCRIPTION OF CONTROL SYSTEM
AND SEQUENCE OF OPERATION
AND SEQUENCE OF OPERA TION
2.4 Domestic hot water mode
2.4 Domestic hot water mode
When the appliance is in rest mode,
When the appliance is in rest mode,
select the summer position by pressing
select the summer position by pressing
the ON/OFF button (item 1 fig. 1) please
the ON/OFF button (item 1 fig. 1) please
ensure that the heating circuit is charged
ensure that the heating circuit is charged
with water (above 1 bar).
with water (above 1 bar).
If the domestic hot water tap is turned
If the domestic hot water tap is turned
on the boiler will function in the
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
The fan speed settings on the boiler increases
to the maximum permissible speed over
to the maximum permissible speed over
a period of 5 seconds and will remain at its
a period of 5 seconds and will remain at its
maximum required power until its maximum
maximum required power until its maximum
regulated temperature is achieved and then
regulated temperature is achieved and then
will modulate to maintain this.
will modulate to maintain this.
When the domestic hot water tap is closed the
When the domestic hot water tap is closed the
diverter valve goes back into rest mode, the
diverter valve goes back into rest mode, the
burner is shut down along with the fan which is
burner is shut down along with the fan which is
If the appliance is in winter mode with a
If the appliance is in winter mode with a
demand for heat to supply radiators, etc. ,
demand for heat to supply radiators, etc. ,
with the heating circuit fully cha
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.
12

When a hot water tap is turned on the diverter
When a hot water tap is turned on the diverter
valve motor moves to exclude the central
valve motor moves to exclude the central
heating circuit, the boiler automatically
heating circuit, the boiler automatically
modulates to maintain the domestic hot water
modulates to maintain the domestic hot water
at a constant temperature.
at a constant temperature.
The water temperature can be regulated by
The water temperature can be regulated by
When domestic hot water is being drawn off
When domestic hot water is being drawn off
the burner and pump perform as they do
the burner and pump perform as they do
during central heating except that the burner
during central heating except that the burner
is commanded by the D.H.W. thermostat.
is commanded by the D.H.W. thermostat.
When D.H.W. is no longer called for (tap is
When D.H.W. is no longer called for (tap is
turned off), the boiler will automatically return
turned off), the boiler will automatically return
to the central heating mode.
to the central heating mode.
Select the summer position by pressing the
Select the summer position by pressing the
summer/winter button. The boiler functions
summer/winter button. The boiler functions
like an automatic gas hot water heater.
like an automatic gas hot water heater.
When D.H.W. is no longer required the
When D.H.W. is no longer required the
burner and pump and fan will immediately
burner and pump and fan will immediately
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
An overheat cut off thermostat acts to turn
off the burner to resettable “lockout”.
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)
2.10 PRESSURE DROP ACROSS
APPLIANCE (Fig. 7)
2.9 AVAILABLE PUMP HEAD
(Fig. 6)
Fig. 5

NOMINAL HEAT INPUT NET QMS 20.0 kW
MINIMUM HEAT INPUT NET 3.7 kW
NOMINAL HEAT OUTPUT 19.5 kW
NOMINAL HEAT OUTPUT CONDENSING 21.4 kW
MINIMUM HEAT OUTPUT 3.6 kW
MINIMUM HEAT OUTPUT CONDENSING 4.0 kW
GAS RATE max 2.1 m
3
/h
AFTER 10 MINUTES min 0.4 m3/h
INLET PRESSURE 20 mbar
FAN SPEED Max 4200 rpm - 140 Hz Combustion % CO2 : 9.0 (+ 0.5 / - 0.5) Case ON
C.H. min 1300 rpm - 43 Hz 9.0 (+ 0.5 / - 0.5) Case OFF
ELECTRICAL SUPPLY 230 V ~ 50 HZ
POWER CONSUMPTION 110 W
EXTERNAL FUSE RATING 3A
INTERNAL FUSE F1 - 3.15 A (20 mm to BS 4265)
DRY WEIGHT 28 kg
WATER CONTENT C.H. 0.8 litre
WATER CONTENT 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 FLOW RATE 1066 I/h 20 °C RISE
MINIMUM FLOW RATE C.H. 350 I/h
D.H.W. FLOW RATE 30 °C rise 11.9 l/min
D.H.W. FLOW RATE 35 °C rise 10.2 l/min
D.H.W. FLOW 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 4800 rpm - 160 Hz min 1300 rpm - 43 Hz
Qmw Input Net Max 25.4 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 II
2H3P
FLUE TYPE - C13 - C33 - C53 NOX 5 SEDBUK
A IP X4 D
3 TECHNICAL DATA
CS 80 (T)
TABLE 3/A
NATURAL GAS (G 20) П2H3P
14

3.1 TECHNICAL DATA
CS 80 (T)
TABLE 3/B
LPG ( G 31) П2H3P
NOMINAL HEAT INPUT NET QMS 20.0 kW
MINIMUM HEAT INPUT NET 3.7 kW
NOMINAL HEAT OUTPUT 19.5 kW
NOMINAL HEAT OUTPUT CONDENSING 21.4 kW
MINIMUM HEAT OUTPUT 3.6 kW
MINIMUM HEAT OUTPUT CONDENSING 4.0 kW
GAS RATE max G31 0.8 m
3
/h
AFTER 10 MINUTES min 0.15 m3/h
INLET PRESSURE G31 37 mbar
FAN SPEED C.H. Max 4200 rpm - 140 Hz
Combustion % CO2 : 10.5 (+ 0.5 / - 0.5) Case ON
min 1300 rpm - 43 Hz 10.5 (+ 0.5 / - 0.5) Case OFF
ELECTRICAL SUPPLY 230 V ~ 50 HZ
POWER CONSUMPTION 110 W
EXTERNAL FUSE RATING 3A
INTERNAL FUSE F1 - 3.15 A (20 mm to BS 4265)
DRY WEIGHT 28 kg
WATER CONTENT C.H. 0.8 litre
WATER CONTENT 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 FLOW RATE 1066 I/h 20 °C RISE
MINIMUM FLOW RATE C.H. 350 I/h
D.H.W. FLOW RATE 30 °C rise 11.9 l/min
D.H.W. FLOW RATE 35 °C rise 10.2 l/min
D.H.W. FLOW 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 4800 rpm - 160 Hz min 1300 rpm - 43 Hz
Qmw Input Net Max 25.4 kW min 3.7 kW
D.H.W. PRESSURE PMW Max 6.5 bar (147 p.s.i.)
D.H.W. PRESSURE PMW min 0.5 bar (118 p.s.i.)
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 II
2H3P
FLUE TYPE - C13 - C33 - C53 NOX 5 SEDBUK
A IP X4 D
15

16
NOMINAL HEAT INPUT NET QMS 24.5 kW
MINIMUM HEAT INPUT NET 4.1 kW
NOMINAL HEAT OUTPUT 23.9 kW
NOMINAL HEAT OUTPUT CONDENSING 26.4 kW
MINIMUM HEAT OUTPUT 4.0 kW
MINIMUM HEAT OUTPUT CONDENSING 4.4 kW
GAS RATE max 2.6 m
3
/h
AFTER 10 MINUTES min 0.4 m3/h
INLET PRESSURE 20 mbar
FAN SPEED Max 4200 rpm - 140 Hz Combustion % CO2 : 9.0 (+ 0.5 / - 0.5) Case ON
C.H. min 1300 rpm - 43 Hz 9.0 (+ 0.5 / - 0.5) Case OFF
ELECTRICAL SUPPLY 230 V ~ 50 HZ
POWER CONSUMPTION 119 W
EXTERNAL FUSE RATING 3A
INTERNAL FUSE F1 - 3.15 A (20 mm to BS 4265)
DRY WEIGHT 29 kg
WATER CONTENT C.H. 0.8 litre
WATER CONTENT 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 FLOW RATE 1264 I/h 20 °C RISE
MINIMUM FLOW RATE C.H. 350 I/h
D.H.W. FLOW RATE 30 °C rise 14.1 l/min
D.H.W. FLOW RATE 35 °C rise 12.1 l/min
D.H.W. FLOW 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 4800 rpm - 160 Hz min 1300 rpm - 43 Hz
Qmw Input Net Max 30.1 kW min 4.1 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 II
2H3P
FLUE TYPE - C13 - C33 - C53 NOX 5 SEDBUK
A IP X4 D
3.2 TECHNICAL DATA
TABLE 3/C CS 90 (T)
NATURAL GAS (G 20) П2H3P

17
NOMINAL HEAT INPUT NET QMS 24.5 kW
MINIMUM HEAT INPUT NET 4.1 kW
NOMINAL HEAT OUTPUT 23.9 kW
NOMINAL HEAT OUTPUT CONDENSING 26.4 kW
MINIMUM HEAT OUTPUT 4.0 kW
MINIMUM HEAT OUTPUT CONDENSING 4.4 kW
GAS RATE max G31 1.0 m
3
/h
AFTER 10 MINUTES min 0.16 m3/h
INLET PRESSURE G31 37 mbar G30 28-30 mbar
FAN SPEED C.H. Max 4200 rpm - 140 Hz Combustion % CO2 : 10.5 (+ 0.5 / - 0.5) Case ON
min 1300 rpm - 43 Hz 10.5 (+ 0.5 / - 0.5) Case OFF
ELECTRICAL SUPPLY 230 V ~ 50 HZ
POWER CONSUMPTION 119 W
EXTERNAL FUSE RATING 3A
INTERNAL FUSE F1 - 3.15 A (20 mm to BS 4265)
DRY WEIGHT 29 kg
WATER CONTENT C.H. 0.8 litre
WATER CONTENT 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 FLOW RATE 1264 I/h 20 °C RISE
MINIMUM FLOW RATE C.H. 350 I/h
D.H.W. FLOW RATE 30 °C rise 14.1 l/min
D.H.W. FLOW RATE 35 °C rise 12.1 l/min
D.H.W. FLOW 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 4800 rpm - 160 Hz min 1300 rpm - 43 Hz
Qmw Input Net Max 30.1 kW min 4.1 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 II
2H3P
FLUE TYPE - C13 - C33 - C53 NOX 5 SEDBUK
A IP X4 D
3.3 TECHNICAL DATA
TABLE 3/D CS 90 (T)
LPG (G 31) П2H3P

18
BS5546: Installation of gas hot water
supplies domestic purposes
(2nd Family Gases).
BS5440: Flues (for gas appliances of rated
input not exceeding 70 kW).
BS5440: 2 Ventilation (for gas appliances of
rated input not exceeding 70 kW).
BSEN 677: 1998 Gas fired central heating
boilers.
I.S. 813: Domestic gas Installations.
The followings standards give
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 CS 80/90 (T) combi boiler has
been tested and examined by CERTIGAZ, and
is certified to comply with PrEN 483 and BS
EN 625.
Manufacturers instructions must NOT be taken
in any way as overriding statutory obligations.
If in doubt on any point please consult
Ravenheat.
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 installation of the boiler MUST be in
The installation of the boiler MUST be in
accordance with the latest I.E.E. (BS 7671)
accordance with the latest I.E.E. (BS 7671)
Wiring Regulations, local building regulations,
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
Both the user and the manufacturer rely
heavily on the installer, whose job it is
heavily on the installer, whose job it is
to install the combination boiler and
to install the combination boiler and
connect it to a correctly designed heating
connect it to a correctly designed heating
system. Acquaint yourself with the relevan
system. Acquaint yourself with the relevan
British Standards concerning installation
British Standards concerning installation
requirements. If you need further advice on
requirements. If you need further advice on
any points contact the Technical Services
any points contact the Technical Services
Office on 0113 2527007 who would be
Office on 0113 2527007 who would be
pleased to help. It is recommended that tools
pleased to help. It is recommended that tools
suitable for brass fittings are used, and have
suitable for brass fittings are used, and have
a capability to accommodate hexagon sizes
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:
BS6891:2005: 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
4.3 LOCATION OF BOILER
Siting of Ravenheat CS 80/90 (T) 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 CS 80/90 (T) combi boiler m
Ravenheat CS 80/90 (T) 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.
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
drawn to the requirements of the current I.E.E.
Wiring Regulations, and in Scotland the
electrical provisions of the Building 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 CS 80/90 (T) 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 Region or the Local Gas
Region contractor. An existing meter should
be checked preferably by the Gas Region to
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 6891:2005. 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
responsibility of the Gas Installer
to size the gas installation pipework in
to size the gas installation pipework in
accordance with BS 6891:2005. Whilst the
accordance with BS 6891:2005. Whilst the
principle of the 1:1 gas valve ensures t
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 l
where it is likely to cause a nuisance in cold
where it is likely to cause a nuisance in cold
and/or humid weather as water vapour may
and/or humid weather as water vapour may
condense on leaving the flue terminal.
condense on leaving the flue terminal.
The effect of such pluming must be
The effect of such pluming must be
The terminal must not be closer than 25 mm
The terminal must not be closer than 25 mm
(1 inch) to any combustible material for
(1 inch) to any combustible material for
protection of combustibles, refer to BS 5440.1.
Where a flue terminal is installed less than 1000
mm from a plastic, or painted gutter; or 500 mm
from painted eaves, an aluminium shield 1000
mm long, should be fitted to the underside of
the gutter or painted surface.
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. The part number is
less than 2 metres high. The part number is
GUARD bby securing concentrically around
terminal with screws.
Available on request from:
Ravenheat Manufacturing ltd
Chartists Way, Morley, Leeds,
West Yorkshire
ENGLAND LS27 9ET - UK
Tel. 0113 252 7007
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 BS6798
2009/5449:1990 - BSEN12828 - BSEN12831
- BSEN14336 (for smallbore and microbore
central heating systems). The following notes
are given for general guidance.

22
Fig.6
4.12 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).
4.13 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 2870
1980.
4.11 PIPEWORK
Copper tubing to BSEN 1057:1 2006, BSEN
1172, BSEN 1652 and BSEN 1653, is
recommended for water pipes. Jointing
should be either with capillary soldered or
with compression fittings.
Where possible pipes should have a gradient
to ensure air is carried naturally to air release
to ensure air is carried naturally to air release
points and water flows naturally to drain
points and water flows naturally to drain
taps. It should be ensured as far as possible
taps. It should be ensured as far as possible
that the appliance’ s heat exchanger is not a
that the appliance’ s heat exchanger is not a
natural collecting point for air except where
natural collecting point for air except where
providing useful heat. Pipes should be
providing useful heat. Pipes should be
insulated to prevent heat loss and to avoid
insulated to prevent heat loss and to avoid
freezing. Particular attention should be paid
freezing. Particular attention should be paid
to pipes passing through ventilated spaces in
to pipes passing through ventilated spaces in
IMPORTANT:
A minimum length of 1 metre of copper pipe
MUST be fitted to both flow and return
connections from the boiler before connection
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 volume 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.

23
4.14 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
If the appliance is connected to a system with
If the appliance is connected to a system with
an unusually high water content, calculate
an unusually high water content, calculate
the total expansion (see table 4) and add
the total expansion (see table 4) and add
additional sealed expansion capacity as
additional sealed expansion capacity as
appropriate (Fig. 7). In general, modern
appropriate (Fig. 7). In general, modern
systems below 7 L should not present any
systems below 7 L should not present any
MAINS WATER FEED. CENTRAL HEATING
MAINS WATER FEED. CENTRAL HEATING
There must be no direct connection to the
There must be no direct connection to the
mains water supply, even through a
mains water supply, even through a
non-return valve, without the approval of the
non-return valve, without the approval of the
Local Water Authority.
Fig.7
4.16 PERMISSIBLE METHODS OF FILLING
Figure depicts the requirements of Diagram
R24.2a of the Water Supply (Water Fittings)
regulations 1999.
Fig.8

If the capacity of the central heating system
If the capacity of the central heating system
should exceed 110 L, an additional vessel
should exceed 110 L, an additional vessel
should be installed on the return to the
should be installed on the return to the
combination boiler from the heating system
combination boiler from the heating system
(fig. 7). Guidance on vessel sizing is given
(fig. 7). Guidance on vessel sizing is given
Reference should be made to British Gas
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.
4.18 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 5376
Part 2.
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
Debris from the system can damage the
boiler and reduce the efficiency. Failure
boiler and reduce the efficiency. Failure
to comply with the guidelines for the use
to comply with the guidelines for the use
of water treatment with the appliance will
of water treatment with the appliance will
invalidate the appliance guarantee and
invalidate the appliance guarantee and
contravene the Building Regulations.
contravene the Building Regulations.
It is recommended that you fit a primary
It is recommended that you fit a primary
water cleanser to the system. We
water cleanser to the system. We
recommend fitting a filter that will help
recommend fitting a filter that will help
remove both magnetite and non-magnetic
remove both magnetite and non-magnetic
debris.
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
T otal 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
107.6
115.8
124.1
132.4
140.7
148.9
157.2
165.5
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
4.17 SIZING OF ADDITIONAL EXPANSION VESSEL TABLE 4
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 WATER TREATMENT
This boiler has an aluminium and stainless steel
heat exchanger, Ravenheat recommend the use
of FERNOX or SENTINEL, or other treatment
products recognised by Ravenheat which must
be used in accordance with the
If the area of installation is recognised as
If the area of installation is recognised as
a hard water area, it is recommended that a
a hard water area, it is recommended that a
suitable water treatment device is installed on
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.
4.21 DOMESTIC WATER
The domestic hot water must be in accordance
with the relevant recommendations of BS 5546.
Copper tubing to BS 2871-1 is recommended
for water carrying pipework and MUST be used
for pipework carrying potable water.
4.22 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
with a connection to a 230 V
~ 50 Hz single phase supply.
~ 50 Hz single phase supply.
The supply must be fused at 3 A.
The supply must be fused at 3 A.
NOTE: The method of connection to the
NOTE: The method of connection to the
electricity supply MUST facilitate complete
electricity supply MUST facilitate complete
electrical isolation of the appliance, by the
electrical isolation of the appliance, by the
use of a fused, double pole isolator, having
use of a fused, double pole isolator, having
a contact separation of at least 3 mm in all
a contact separation of at least 3 mm in all
poles. The point of connection to the electricity
poles. The point of connection to the electricity
supply must be readily accessible and
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 GB.
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:
The appliance carton contains:
a) Boiler fully assembled with fl ue adaptor
a) Boiler fully assembled with fl ue adaptor
b) Installation instructions,
b) Installation instructions,
user instructions and Benchmark log
user instructions and Benchmark log
e) Polythene bag containing:
e) Polythene bag containing:
1-15 mm gas service valve
1-15 mm gas service valve
- 2-22 mm compression ball valves
- 2-22 mm compression ball valves
complete with 3/4” washers
complete with 3/4” washers
- 1-15 mm compression ball valves
- 1-15 mm compression ball valves
complete with 1/2” washers
complete with 1/2” washers
- 1- 15 mm compression ball valve
- 1- 15 mm compression ball valve
- 2 fi xing bolts and wall plugs
- 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 5.6 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
25

IMPORTANT: Please lubricate the
internal part of the seals before
fitting.
26
TYPE OF FLUE SYSTEM (All types) - minimum and maximum distance TABLE 5
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)
(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
5.5 OPTIONAL EXTRAS
HORIZONTAL FLUE KIT BOX CONTAINING
(Fig 10):
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 length is 8 metres, duct extension can be used with
the standard fl ue (see table 5).
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 6
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
5.6 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
5.7 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
Mark the two holes for the top fixing bolts to
fix the boiler on the wall as well as the
fix the boiler on the wall as well as the
- Detach the template from the wall.
- Detach the template from the wall.
- Use a 10 mm dia drill to make the 2 holes.
- Use a 10 mm dia drill to make the 2 holes.
Insert the plastic expansion plugs.
Insert the plastic expansion plugs.
- Cut or core drill a 105 mm dia hole for
- Cut or core drill a 105 mm dia hole for
Fit the elbow header into the flue flange on
Fit the elbow header into the flue flange on
the top of the boiler, positioning it towards
the top of the boiler, positioning it towards
the required direction (fig 13).
the required direction (fig 13).
Important: Make sure that the inner 60 mm
Important: Make sure that the inner 60 mm
diameter of the elbow header is inserted
diameter of the elbow header is inserted
fully into the flue manifold, and the flue
fully into the flue manifold, and the flue
manifold rubber seal is correctly fitted.
manifold rubber seal is correctly fitted.
If using the horizontal flue duct and it is too
If using the horizontal flue duct and it is too
long it can be shortened. Should it be
long it can be shortened. Should it be
necessary to cut the flue always cut on right
necessary to cut the flue always cut on right
angles and ensure the cut is de-burred.
angles and ensure the cut is de-burred.
: Add 30mm to overall flue length to
: Add 30mm to overall flue length to
allow for terminal wall cover.( fig.10 item 127).
allow for terminal wall cover.( fig.10 item 127).
Insert the flue assembly locating it onto the
Insert the flue assembly locating it onto the
Lift the boiler on the wall, locating onto the top
Lift the boiler on the wall, locating onto the top
two fixing bolts. Tighten the two bolts using a
two fixing bolts. Tighten the two bolts using a
spanner to secure to the wall.
spanner to secure to the wall.
Working above the boiler pull the flue exhaust
Working above the boiler pull the flue exhaust
duct towards the boiler in order to engage tube
duct towards the boiler in order to engage tube
(fig. 18 item 61) into its header.
(fig. 18 item 61) into its header.
Position flue into elbow header and push so as
Position flue into elbow header and push so as
to locate inner and outer flue correctly ensuring
to locate inner and outer flue correctly ensuring
a good seal is made with O-rings. Tighten the
a good seal is made with O-rings. Tighten the
two screws on the flue flange to secure the
two screws on the flue flange to secure the
Fit the terminal rubber wall seal and if
Fit the terminal rubber wall seal and if
necessary terminal guard.
necessary terminal guard.
Extension kits are available to order for flue
Extension kits are available to order for flue
extension of up to a total overall length of 8
extension of up to a total overall length of 8
Each extension length extends the pipe by
Each extension length extends the pipe by
approximately 1000 mm long up to a maximum
approximately 1000 mm long up to a maximum
Extensions must be installed with the widened
Extensions must be installed with the widened
end of the pipe and the tapered end of the flue
end of the pipe and the tapered end of the flue
pipe aimed towards the exhaust terminal.
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 5).
5.8 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
- Mark the two fixing bolt securing holes on the
- Mark the two fixing bolt securing holes on the
wall and extend the axis of the flue duct hole
wall and extend the axis of the flue duct hole
to the side wall ensuring it i
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 (127 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
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
Important: Make sure that the inner 60mm
diameter of the elbow header is inserted
diameter of the elbow header is inserted
fully into the flue manifold, and the flue
fully into the flue manifold, and the flue
manifold rubber seal is correctly fitted.
manifold 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 overall flue length 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
Lift the boiler on the wall, locating onto the
two fixing bolts. Tighten the two bolts using a
two fixing bolts. Tighten the two bolts using a
spanner to secure to the wall.
spanner to secure to the wall.
Working above the boiler pull the flue duct
Working above the boiler pull the flue duct
towards the elbow in order to engage the
towards the elbow in order to engage the
tube into its header (fig.10). Position the flue
tube into its header (fig.10). Position the flue
elbow in line with the flue and push so as to
elbow in line with the flue and push so as to
locate inner and outer flue correctly. Ensuring
locate inner and outer flue correctly. Ensuring
a good seal is made with O-rings. Tighten the
a good seal is made with O-rings. Tighten the
two screws on the flue flange to secure the
two screws on the flue flange to secure the
Terminal rubber wall seal must be fitted (item
Terminal rubber wall seal must be fitted (item
Each extension length extends the pipe
Each extension length extends the pipe
by approximately 1000 mm long up
by approximately 1000 mm long up
to a maximum of seven extensions.
to a maximum of seven extensions.
Pipeline length can be established using the
Pipeline length can be established using the
instructions in section 5.5. Extensions must
instructions in section 5.5. Extensions must
be installed with the widened end of the air
be installed with the widened end of the air
intake pipe and the tapered end of the flue
intake pipe and the tapered end of the flue
pipe aimed towards the exhaust terminal.
pipe aimed towards the exhaust terminal.
NOTE:
The position of the appliance must provide
minimum side clearances of 5mm as the
side panels.
Extensions must be joined together with the
Extensions must be joined together with the
standard terminal pipe, and inserted in each
standard terminal pipe, and inserted in each
other as far as they can go.
other as far as they can go.
If an extension must be shortened, this must
If an extension must be shortened, this must
be done from the straight end, and not from
be done from the straight end, and not from
the widened or tapered end. To measure the
the widened or tapered end. To measure the
pipeline properly all components must be
pipeline properly all components must be
assembled and total length measured before
assembled and total length measured before
cutting. The straight end of the extension
cutting. The straight end of the extension
connects to the boiler. The flue output and air
connects to the boiler. The flue output and air
intake pipes fits into the boiler header until it
intake pipes fits into the boiler header until it
When cutting both inner and outer ducts of
When cutting both inner and outer ducts of
the extension, always ensure that the reduced
the extension, always ensure that the reduced
end (male) of the inner and outer duct are
end (male) of the inner and outer duct are
square and to the same length.
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 5 mm as the
side panels.

5.10 INTAKE AND EXHAUST TERMINAL COMPONENTS
Fig.17
IMPORTANT: Please lubricate the
internal part of the seals before
fitting.
5.11 IN-LINE FLUE BEND AND FLUE EXTENSION
Fig.18
49 - In-line Flue Bend
56 - Rubber seal Ø 100
59 - Rubber seal Ø 60
63 - Air intake duct extension
64 - Flue exhaust duct extension
31
KEY
50 - Flue fl ange
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
63 - Flue extension
64 - Flue exhaust duct extension
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).
5.9 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.
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
5.12 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
length is not exceeded (fig. 20 and see table 5).
length is not exceeded (fig. 20 and see table 5).
- Mark the two wall fixing bolt holes
- Mark the two wall fixing bolt holes
- Detach the template from the wall.
- Detach the template from the wall.
- Use a 10 mm dia. drill to make the 2 holes.
- Use a 10 mm dia. drill to make the 2 holes.
- Insert plastic expansion plug.
- Insert plastic expansion plug.
- Screw in the two coach bolts.
- Screw in the two coach bolts.
- Position the flue sample point starter (straight
- Position the flue sample point starter (straight
flue header which must be fitted) and fix the
flue header which must be fitted) and fix the
securing screw on the flue adaptor appliance
securing screw on the flue adaptor appliance
(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 flue manifold,
and the flue manifold 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
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
PR5094110A 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
ACCESSORIES CONCENTRIC FLUE 60/100 EXTRAS:
TABLE 7

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.
5.13 INSTALLATION INSTRUCTIONS FOR TWIN FLUE PIPE (ECCENTRIC FLUE DUCT SYSTEM)
5.14 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
CS 80/90 (T) range.
Typical installation procedures are illustrated
by drawings.
Remove the front panel of the case (sect.8.1).
Unscrew the screw (item 66 fi g. 17) on the
fl ue adapter .
Make sure that the fl ue manifold rubber seal
Make sure that the fl ue manifold rubber seal
is located into the fl ue manifold, and lubricate
is located into the fl ue manifold, and lubricate
the internal part of the seal before assembly.
the internal part of the seal before assembly.
Locate the header gasket on the twin fl ue
Locate the header gasket on the twin fl ue
header and push into the fl ue adaptor making
header and push into the fl ue adaptor making
sure that the inner plastic exhaust
sure that the inner plastic exhaust locates
fi rmly in the outlet spigot of the fl ue manifold,
and screw the securing screw that secure the
twin fl ue header on 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 easy
snug fi t.
Figures show the versatility of this flueing
system. 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
SDO110050 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 8

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.
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
Chartists way, Morley, Leeds, West Yorkshire
ENGLAND LS27 9ET - U.K.
Tel: 0113 252 7007
5.15
5.16
5.17
IMPORTANT: Please lubricate the
internal part of the seals before
fitting.

36
5.18 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
installed on either a flat
roof or a pitched roof (maximum pitch 60°).
roof or a pitched roof (maximum pitch 60°).
Where a straight vertical flue is not possible or
Where a straight vertical flue is not possible or
desired, an offset vertical flue can be used in
desired, an offset vertical flue can be used in
conjunction with a side horizontal flue extension
conjunction with a side horizontal flue extension
piece and an inline 135°/90° flue bend (fig. 27).
piece and an inline 135°/90° flue bend (fig. 27).
Part No Description
PR5094110A 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
TEG060050 Flashing sleeve/slate
IMPORTANT:
-
See fi g. 6 for terminal clearances.
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 9
Available on request from:
Available on request from:
RAVENHEAT MANUFACTURING LTD
RAVENHEAT MANUFACTURING LTD
Chartists way, Morley, Leeds, West Yorkshire
Chartists way, Morley, Leeds, West Yorkshire

Fig.29
5.24 POSITION OF WATER/GAS
CONNECTIONS
37
5.19 ASSEMBLE BOILER
5.20 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.
5.21 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
Fit the gas service cock to the boiler via the
union nut and connect gas pipe. Do not over
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).
5.22 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).
5.23 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 mm. cold water pipe to the
appliance inlet.
- Connect the 15 mm. hot water pipe to the
appliance outlet.
Fig. 30

38
5.25 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, an easily visible
position, 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.
5.26 CONDENSATE DRAIN CONNECTION
The condensate drain connection is a flexible
3/4” pipe and is therefore adjustable Fig. 29.
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. 31
Fig. 32

39
3 - TERMINATION TO SOAK AWAY 4 - TERMINATION TO DRAIN / GULLY
5.27 CONVERTING THE APPLIANCE
TO DIFFERENT GAS TYPES
Boilers are factory set to work for use
with Natural gas or LPG gas. This is
clearly marked on the packaging and
boiler data badge.
To convert a boiler from one gas to
another this operation must be carried
out by a qualified competent person,
with all necessary equipment
authorised by the manufacturer.
It will also be necessary to obtain a data badge
conversion kit directly from Ravenheat.
1 - Remove the case.
2 - Check gas mains pressure at the gas
valve test nipple upstream (fig.35)
with boiler operating (sect.6.8).
3 - Adjust fan speed as sect.3
(technical data).
4 - Measure the level of CO2
6.9 and table 10, and adjust to correct
6.9 and table 10, and adjust to correct
data settings information.
data settings information.
5 - Affix new data badge.
6 - Replace in reverse order.
5.28 ELECTRICAL CONNECTIONS
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.
You can slide towards the top the
You can slide towards the top the
instrument panel box and push the retaining
instrument panel box and push the retaining
latches and remove the instrument panel
latches and remove the instrument panel
- Heat resistant flexible cable is fitted
- Heat resistant flexible cable is fitted
between the isolator and the terminal block
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.
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.
Fig. 33
Fig. 34

40
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.
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
Preliminary 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.
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 P button to
display the current pressure (code E8 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
Continue filling the system until 1.5 bar
register on digital display.
register on digital display.
button once again to return to the main
button once again to return to the main
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 P 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 remove at 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-of f 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 (
clock and thermostat) make sure that they
clock and thermostat) make sure that they
- Select winter function, the winter icon in
- Select winter function, the winter icon in
digital display will be flashing (item 3 fig.
digital display will be flashing (item 3 fig.
- To select the minimum heating temperature
- To select the minimum heating temperature
press the radiator button.
press the radiator button.
Before lighting the boiler select the minimum
Before lighting the boiler select the minimum
central heating temperature. This must be left
central heating temperature. This must be left
at minimum for approx 5 mins to purge air
at minimum for approx 5 mins to purge air
safely from the boiler.
GAS VALVE
Fig. 36
Fig. 35

To select the minimum heating temperature
To select the minimum heating temperature
press the radiator button.
press the radiator button.
- Press arrow up and arrow down buttons to
- Press arrow up and arrow down buttons to
- The digital display shows the current set
- The digital display shows the current set
temperature in central heating.
temperature in central heating.
- After a few seconds the digital display shows
- After a few seconds the digital display shows
the central heating temperature in demand
the central heating temperature in demand
(C.H. icon flashing, item 3 fig. 2).
(C.H. icon flashing, item 3 fig. 2).
- The fan starts and after a few seconds or
- The fan starts and after a few seconds or
so the digital led display will show that the
so the digital led display will show that the
- NOTES: Put the digital clock in demand
- NOTES: Put the digital clock in demand
- The ignition control will automatically make
- The ignition control will automatically make
three attempts to start, if it doesn’t start this
three attempts to start, if it doesn’t start this
may be due to air in the gas supply line.
may be due to air in the gas supply line.
If the burner fails to light, the digital led
If the burner fails to light, the digital led
display and fan will stop, and the display
display and fan will stop, and the display
will show the lockout code (E1 depicts flame
will show the lockout code (E1 depicts flame
- If necessary push the boiler Reset button
- If necessary push the boiler Reset button
(item 2 fig.1) and the boiler will restart
(item 2 fig.1) and the boiler will restart
- After the boiler has lit, allow to warm at
- After the boiler has lit, allow to warm at
minimum temperature setting to purge any
minimum temperature setting to purge any
- Once the system has been purged of air,
- Once the system has been purged of air,
set the heating temperature to the desired
set the heating temperature to the desired
6.8 CHECK THE GAS PRESSURE
6.8 CHECK THE GAS PRESSURE
Check the gas mains pressure at the gas
Check the gas mains pressure at the gas
valve inlet pressure test point (fig.35) with the
valve inlet pressure test point (fig.35) with the
boiler operating at full rate.
boiler operating at full rate.
Check with the Local Gas supplier if the
Check with the Local Gas supplier if the
pressure differs significantly from 20 mbar
pressure differs significantly from 20 mbar
G20 (natural gas), 37 mbar G31 (propane).
G20 (natural gas), 37 mbar G31 (propane).
With leak detection fluid test for gas tightness
With leak detection fluid test for gas tightness
of all gas components and joints.
of all gas components and joints.
The Gas Valve Throttle adjuster is required
The Gas Valve Throttle adjuster is required
to be sealed with tamper proof paint after
to be sealed with tamper proof paint after
Check all gas carrying components along with,
Check all gas carrying components along with,
the combustion of the appliance which should
the combustion of the appliance which should
Remove the front panel of the appliance.
Remove the front panel of the appliance.
Ensure the boiler and external controls are
Ensure the boiler and external controls are
calling for heat. Turn on the electrical supply.
calling for heat. Turn on the electrical supply.
open the hot water tap at maximum flow rate.
open the hot water tap at maximum flow rate.
Wait at least five minutes or until the unit has
Wait at least five minutes or until the unit has
reached its operating temperature.
reached its operating temperature.
Unscrew the test sample screw on the boiler
Unscrew the test sample screw on the boiler
elbow bend (item 60 fig. 10). Measure the level
elbow bend (item 60 fig. 10). Measure the level
. Check the reading against the
. Check the reading against the
corresponding value in table 10 and with
corresponding value in table 10 and with
reference to page 63.
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
carrying out a combustion
measurement should have been assessed
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
CO2%
NATGAS 9.0(+0.5/‐0.5)
LPG 10.5(+0.5/‐0.5)
It is essential that this test is repeated
It is essential that this test is repeated
with the casing on as this will check the
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 10, adjust the
maximum level of CO
2
with the Throttle
using a 4 mm hex on the gas valve (fig.35).
Anti-clockwise to decrease CO
2
.
Clockwise to increase CO
2
After any new regulation wait to stabilise
for about one minute. Replace the front
cover.
TABLE 10

Once the process of commissioning the boiler is complete, the
Once the process of commissioning the boiler is complete, the
commissioning engineer MUST complete the relevant section in the Benchmark log book.
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,
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 D.H.W. 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 12 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 D.H.W. 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
This will result in the boiler, at any time,
This will result in the boiler, at any time,
periodically firing to keep the water
periodically firing to keep the water
within the boiler up to temperature to
within the boiler up to temperature to
reduce the time delay of hot water
reduce the time delay of hot water
delivered to any hot draw off point.
delivered to any hot draw off point.
- Press P button (item 8 fig. 1) for 3
- Press P button (item 8 fig. 1) for 3
seconds to enter in menu.
seconds to enter in menu.
- Use arrow up and arrow down buttons
- Use arrow up and arrow down buttons
(item 5 and 6 fig. 1), to select BOIL.
(item 5 and 6 fig. 1), to select BOIL.
- Press reset and the up arrow button
- Press reset and the up arrow button
together (item 2 and 3 fig. 1) and then
together (item 2 and 3 fig. 1) and then
- Use arrow up and arrow down buttons
- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1) to select the
(item 3 and 4 fig. 1) to select the
- PM3 Keep hot (“0” disabled, “1” enable).
- PM3 Keep hot (“0” disabled, “1” enable).
6.14 C.H. HIGH/LOW TEMPERATURE
6.14 C.H. HIGH/LOW TEMPERATURE
The boiler comes set, in Central heating,
The boiler comes set, in Central heating,
at the 80°C flow temperature.
at the 80°C flow temperature.
It is possible to adjust the max set-point to
It is possible to adjust the max set-point to
- Press P button (item 8 fig. 1) for 3
- Press P button (item 8 fig. 1) for 3
seconds to enter in menu.
seconds to enter in menu.
- Use arrow up and arrow down buttons
- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1), to select BOIL.
(item 3 and 4 fig. 1), to select BOIL.
- Press reset and the up arrow button
- Press reset and the up arrow button
together (item 2 and 3 fig. 1) and then
together (item 2 and 3 fig. 1) and then
- Use arrow up and arrow down buttons
- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1) to select the
(item 3 and 4 fig. 1) to select the
- PM4 (“1” high temperature, “2” low
- PM4 (“1” high temperature, “2” low

necessary to prevent damage to the system,
and to the building, in the event of the
system remaining inoperative during frost
conditions.
- Explain the function and t he use of the
boiler, the summer/winter button, the
ON/OFF switch and the reset of the di gital
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 the digital time.
- 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
appliance from the gas, water and
appliance from the gas, water and
electricity supplies and the locations of
all drain points.
RATIO BETWEEN FAN SPEED
AND HEAT INPUT
Fig. 38
Range rating regulation of Central Heating
C.H. regulations Heat input (kW) Fan speed (rpm)
CS 80 CS 90 CS 80 CS 90
Maximum setting 20 24,5 4200 4200
Minimum setting 3,7 4,1 1300 1300
TABLE 11/A
Range rating regulation of Domestic Hot Water
D.H.W. regulations Heat input (kW) Fan speed (rpm)
CS 80 CS 90 CS 80 CS 90
Maximum setting 25,4 30,1 4800 4800
Minimum setting 3,7 4,1 1300 1300
TABLE 11/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
manufacturer during production. If the
manufacturer during production. If the
adjustments need to be made again, observe
adjustments need to be made again, observe
the following procedures.
the following procedures.
The adjustment to fan speed must be
The adjustment to fan speed must be
strictly in the sequence indicated, by
strictly in the sequence indicated, by
qualified personnel only.
qualified personnel only.
To check max fan speed, see tables 11/A
To check max fan speed, see tables 11/A
- Press P button (item 8 fig. 1) for 3
- Press P button (item 8 fig. 1) for 3
seconds to enter in menu.
seconds to enter in menu.
- Use arrow up and arrow down buttons
- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1), to select BOIL.
(item 3 and 4 fig. 1), to select BOIL.
- Press reset and the up arrow button
- Press reset and the up arrow button
together (item 2 and 3 fig. 1) and then
together (item 2 and 3 fig. 1) and then
- Use arrow up and arrow down buttons
- Use arrow up and arrow down buttons
(item 3 and 4 fig. 1) to select the
(item 3 and 4 fig. 1) to select the
- PM1 CH max fan speed.
- PM2 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
function by pressing
arrow down buttons, (item 3 and 4 fi g. 1)
arrow down buttons, (item 3 and 4 fi g. 1)
Press the arrow up and the arrow down buttons
Press the arrow up and the arrow down buttons
to set the maximum or minimum fan speed.
to set the maximum or minimum fan speed.
The function is enabled for maximum 15
The function is enabled for maximum 15
minutes and it has priority on D.H.W. mode.
minutes and it has priority on D.H.W. mode.
Press reset to esc test mode.
Press reset to esc test mode.
6.17 INSTRUCTING THE USER
6.17 INSTRUCTING THE USER
After completion of the installation and
After completion of the installation and
commissioning of the system, the installer
commissioning of the system, the installer
should hand over to the Householder by
should hand over to the Householder by
taking the following actions:
taking the following actions:
- To the Householder explain his/her
- To the Householder explain his/her
responsibilities under the “Gas Safety
responsibilities under the “Gas Safety
- Explain and demonstrate the lighting
- Explain and demonstrate the lighting
and shutting down procedures.
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
43

44
7 SERVICING INSTRUCTIONS
Ravenheat is a member of the Benchmark
initiative and fully supports the aims of the
programme.
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
- Check all joints and connections in the
- Check all joints and connections in the
appliance and remake any that show signs
appliance and remake any that show signs
Service consumables are not covered by
Service consumables are not covered by
To view warranty exclusions please visit
To view warranty exclusions please visit
or contact us on 01132 527007.
or contact us on 01132 527007.
COMPETENCE TO CARRY OUT THE CHECK
COMPETENCE TO CARRY OUT THE CHECK
OF COMBUSTION PERFORMANCE.
OF COMBUSTION PERFORMANCE.
Please note: BS6798:2009 Specification for
Please note: BS6798:2009 Specification for
installation and maintenance of gas-fired
installation and maintenance of gas-fired
boilers of rated input not exceeding 70 kW
boilers of rated input not exceeding 70 kW
- The person carrying out a combustion
- The person carrying out a combustion
measurement should have been a
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 th
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.
Combustion testing must be carried out by competent person
using a combustion analyser conforming to BS7927.

- IMPORTANT:
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
Examine and remove loose debris from
the combustion chamber using a soft
the combustion chamber using a soft
brush and vacuum cleaner. Carefully flush,
brush and vacuum cleaner. Carefully flush,
by spraying water at any remaining debris
by spraying water at any remaining debris
through the condensate trap.
through the condensate trap.
(Ensure the water is kept away from
(Ensure the water is kept away from
Inspect the siphonic condensate trap for
Inspect the siphonic condensate trap for
a blockage. Remove the cap at the base
a blockage. Remove the cap at the base
of the condensate trap. Remove an
of the condensate trap. Remove any
debris found. Remove the float to clean it.
Any deposits should be flushed out.
Reassemble and refit the condensing
trap.
When refitting the cap ensure that a
watertight seal is achieved, but do not use
excessive force.
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.
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
After replacing any parts always test for
gas soundness and if necessary carry out
gas soundness and if necessary carry out
functional test of the controls.
functional test of the controls.
For replacement of parts, the front, and
For replacement of parts, the front, and
bottom panels of the boiler will need to be
bottom panels of the boiler will need to be
removed (it is not necessary to remove the
removed (it is not necessary to remove the
side panels as all parts are accessible from
side panels as all parts are accessible from
the front or beneath the boiler).
the front or beneath the boiler).
8.2 TO REMOVE THE BOILER PANELS
8.2 TO REMOVE THE BOILER PANELS
To remove the front panel unscrew the two
To remove the front panel unscrew the two
lower screws that secure the front panel to
lower screws that secure the front panel to
the boiler and lift off..

46
8.5 TO REMOVE/REPLACE FAN
(Fig. 42)
Remove the front panel (fig. 39).
Unscrew the gas pipe nut and remove
the retaining clip. Detach the connectors
the retaining clip. Detach the connectors
Unscrew the four screws that fix the fan
Unscrew the four screws that fix the fan
and remove only the right screws.
and remove only the right screws.
Pull the fan to the right and pull forward.
Pull the fan to the right and pull forward.
Replace in reverse order (always fitting a
Replace in reverse order (always fitting a
8.3 TO REMOVE LEFT AND RIGHT PANELS
(Fig. 40)
Remove the front panel (fig. 39).
Remove the front panel (fig. 39).
Unscrew the four screws to the bottom
Unscrew the four screws to the bottom
Unscrew the two screws to the side panel
Unscrew the two screws to the side panel
and pull.
8.4 TO REMOVE/REPLACE SPARK
IGNITER BOX (Fig. 41)
Remove the front panel (fig. 39).
Detach all the connectors from the igniter
control box.
Remove the 2 screws that secure the spark
igniter to the bracket.
Replace in reverse order.
Fig.40
Fig.41
Fig.42

47
8.6 TO REMOVE/ REPLACE THE
ELECTRODES (Fig.37)
Remove the front panel (fig. 39).
Remove the ignition and/or sensing lead
plug.
Unscrew the two securing screws 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).
8.7 TO REMOVE/REPLACE THE BURNER
(FIG.43)
Remove the front panel (fig. 39).
Unscrew the gas pipe nut and remove the
retaining clip. Detach the connectors from
Unscrew the screws to the burner cover
and remove the cover with the fan.
To remove the burner, unscrew the screws
in the lower cover side.
Replace in reverse order (always fitting a
new gasket).
Fig.43
8.8 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
Follow the instructions to
remove the burner (sect. 8.7). Pull down to
remove the burner (sect. 8.7). 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

48
Fig.45
Fig.44
8.9 TO REMOVE/REPLACE EXPANSION
VESSEL (Fig.44)
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.
8.10 TO REMOVE/REPLACE GAS VALVE
(Fig. 45)
Remove the front and bottom panels
(fig. 39-40).
Unscrew the nut and the four screws on
Unscrew the nut and the four screws on
the bottom of the gas valve.
the bottom of the gas valve.
Replace in reverse order.
Replace in reverse order.
IMPORTANT:
when the gas valve is re-fitted, check
combustion CO2 and adjust if
necessary (see section 6.9).
8.11 TO REMOVE/REPLACE PLATE HEAT
EXCHANGER (Fig. 46)
Remove the front and bottom panels
(fig. 39-40).
Remove the panel control box (sect.
8.23).
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.
8.12 TO REMOVE/REPLACE THE WATER
PRESSURE TRANSDUCER (Fig. 45)
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.46

8.13 TO REMOVE/REPLACE DIVERTER VALVE
MOTOR (Fig. 47)
Remove the front and bottom panels
(fig. 39-40).
Detach the electrical plug and remove the
Detach the electrical plug and remove the
Replace in reverse order.
Replace in reverse order.
8.14 TO REMOVE/REPLACE C.H.
8.14 TO REMOVE/REPLACE C.H.
Remove the front and bottom panels
(fig. 39-40).
Remove the panel control box (sect. 8.23).
Remove the panel control box (sect. 8.23).
Close the on/off valves for the heating
Close the on/off valves for the heating
circuit and drain the water at drain point
circuit and drain the water at drain point
Remove diverter valve motor switch, to
Remove diverter valve motor switch, to
allow access and unscrew the C.H.diverter
allow access and unscrew the C.H.diverter
Replace in reverse order.
Replace in reverse order.
NOTE: Always use new O-ring.
NOTE: Always use new O-ring.
8.16 TO REMOVE/REPLACE PUMP (Fig.48)
Remove the front and bottom panels
(fig. 39-40).
Close the on/off valves for the heating
Close the on/off valves for the heating
circuit and drain the water at drain point
circuit and drain the water at drain point
the supply wire connector from the
the supply wire connector from the
Unscrew the nut that fastens the pump to
Unscrew the nut that fastens the pump to
the CH pipe and remove the pump and
the CH pipe and remove the pump and
remove the securing clip at the pump
remove the securing clip at the pump
Replace in reverse order.
Replace in reverse order.
Always use new O-ring.
8.17 TO REMOVE/REPLACE AUTOMATIC
AIR VENT (Fig. 48)
Remove the front and bottom panels
(fig. 39-40).
Remove the panel control box (sect. 8.23).
Remove the panel control box (sect. 8.23).
Close the on/off valves for C.H. circuit and
Close the on/off valves for C.H. circuit and
drain the water from at drain point Fig.36.
drain the water from at drain point Fig.36.
Remove the clip and pull the automatic air
Remove the clip and pull the automatic air
Replace in reverse order.
Replace in reverse order.
NOTE: Always use new O-ring.
NOTE: Always use new O-ring.
8.15 TO REMOVE/REPLACE D.H.W.
DIVERTER VALVE MECHANISM
( Fig. 47)
Remove the front and bottom panels
(fig. 39-40).
Remove the panel control box (sect. 8.23).
Remove the panel control box (sect. 8.23).
Close the on/off valves for the heating
Close the on/off valves for the heating
circuit and drain the water at drain point
circuit and drain the water at drain point
Remove flow detector and unscrew DHW
Remove flow detector and unscrew DHW
Replace in reverse order.
Replace in reverse order.
NOTE: Always use new O-ring
NOTE: Always use new O-ring.
49
Fig.47
Fig.48

8.18 TO REMOVE/REPLACE SAFETY RELIEF
VALVE (Fig. 47)
Remove the front and bottom panels
(fig. 39-40).
Close the on/off valves for C.H. circuit and
Close the on/off valves for C.H. circuit and
drain the water from at drain point fig.36.
drain the water from at drain point fig.36.
Unscrew the safety relief valve screw and
Unscrew the safety relief valve screw and
Replace in reverse order and using a new
Replace in reverse order and using a new
8.19 TO REMOVE/REPLACE D.H.W. SENSOR
8.19 TO REMOVE/REPLACE D.H.W. SENSOR
Remove the front and bottom panels
(fig. 39-40).
Close the on/off valve for the DHW circuit
Close the on/off valve for the DHW circuit
and drain the hot water from the lowest hot
and drain the hot water from the lowest hot
Detach the wire connector and unscrew the
Detach the wire connector and unscrew the
Replace in reverse order.
Replace in reverse order.
8.20 TO REMOVE/REPLACE C.H. FLOW AND
8.20 TO REMOVE/REPLACE C.H. FLOW AND
Remove the front panel (fig. 39).
Detach the wire connector and remove
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).
8.21 TO REMOVE/REPLACE FLUE SENSOR
(Fig. 3 item 22)
Remove
the front panel (fig. 39).
Detach the wire connector and rotate the
sensor.
Replace in reverse order.
Fig.49
8.22 TO CLEAN AND REMOVE/REPLACE
CONDENSING TRAP (Fig. 50)
Remove the
front panel (fig. 39), bottom
front panel (fig. 39), bottom
and left side panels (fig. 40).
and left side panels (fig. 40).
Remove the securing clip and pull
Remove the securing clip and pull
out the plastic pipe that connects the
out the plastic pipe that connects the
condensing trap at the heat exchanger.
condensing trap at the heat exchanger.
Unscrew the nut that fastens the
Unscrew the nut that fastens the
condensing trap to the depr
condensing trap to the depression
chamber and remove it.
If the side panel can not be removed then
remove the gas valve (see sec 8.10) and
continue with the above instructions.
Replace in reverse order.
50
Fig.50

Fig.53
Fig.55
Fig.54
51
8.23 TO REMOVE PANEL CONTROL BOX
(Fig. 51,52,53).
Remove the
Pull forward the control panel box with
Pull forward the control panel box with
both hands until it is slightly out of the
both hands until it is slightly out of the
boiler. As doing so move the box
boiler. As doing so move the box over to
the left while still pulling it forward until
the control box becomes free.
Lift and fix the box on the depression
chamber with the service retaining clips
(fig. 53).
This will allow free access to lower part
of the boiler.
Fig.51
Fig.52
8.24 TO REMOVE THE INSTRUMENT PANEL
(Fig. 54).
Remove the
Push the four retaining latches and
Push the four retaining latches and
remove the front of the panel box (fig.
remove the front of the panel box (fig.
8.25 TO REMOVE/REPLACE CONTROL
8.25 TO REMOVE/REPLACE CONTROL
Remove the front panel (fig. 39).
Remove the front panel (fig. 39).
Remove the instrument panel (sect.
Remove the instrument panel (sect.
Detach all connectors from control board,
Detach all connectors from control board,
unscrew the four screws and lift up.
unscrew the four screws and lift up.
Replace in reverse order (fig. 55).
Replace in reverse order (fig. 55).
8.26 TO REMOVE/REPLACE DIGITAL
8.26 TO REMOVE/REPLACE DIGITAL
Remove the front panel (fig. 39).
Remove the front panel (fig. 39).
Remove the instrument panel (8.24).
Remove the instrument panel (8.24).
Detach the connectors and unscrew the
Detach the connectors and unscrew the
Replace in reverse order.
Replace in reverse order.
8.27 EXTERNAL CONTROL CONNECTION
8.27 EXTERNAL CONTROL CONNECTION
Remove the front panel (fig. 39).
Remove the front panel (fig. 39).
Remove the external wire link on the
Remove the external wire link on the
Replace with external wire controls.
Replace with external wire controls.
(These must be volt free).
(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
see section 9, and after selecting the summer position on the digital display and setting
the domestic hot water temperature to maximum (
the domestic hot water temperature to maximum (sect.1.5).
Open the domestic hot tap and check the following appliance operations:

56
Pos. Part. No. G.C.
Part. No.
Description
1 CIR150100 Digital display
2 PAN150100 Instrument panel CS 80/90 with timer
2.1 PAN150150 Instrument panel CS 80/90 without timer
3 CIR150070 Control board
4 SCA110051 Instrument panel box
5 FUS010150 Internal fuse 3.15 A
6 TRA150100 Water pressure transducer
7 FOR150250 Water pressure transducer clip
8 GRU150120 Return manifold
9 GRU150100 Turbine manifold
10 ORI110450 Plate heat exchanger O-ring
11 SCA150150 CS 80 plate heat exchanger
11.1 SCA150200 CS 90 plate heat exchanger
12 VAL150250 Drain valve
13 GRU150050 Flow manifold
14 VAL150100 Safety relief valve
15 5018025 1/2” gasket
(GUA010200)
16 TUB150480 Safety relief valve pipe
17 TUR150050 Turbine
18 RIV150050 Flow detector switch
19 SON150050 D.H.W. sensor
20 OTT150050 Diverter valve by-pass
21 FOR150150 Diverter valve motor clip
22 MOT150050 Diverter valve motor
23 5018030 3/4”gasket
(GUA010250)
24 TUB150150 Gas valve inlet pipe
25 TUB150070 Flow pipe
26 SON110100 C.H. fl ow and return sensors (SON110150)
27 ORI150100 Primary heat exchanger O-ring
28 FOR150050 Primary heat exchanger clip
29 TER080050 Overheat thermostat (TER060150)
30 VAL150200 Manual air vent
31 TUB110150 Flexible condensing pipe
(TUB110300)
32 RAC110050 Condensing trap
33 FAS150050 Condensing trap pipe hose clamp 12-22
34 TUB150050 Condensing pipe
35 FAS150150 Condensing trap hose clamp 30-45
36 GUA010260 3/4” gas valve gasket
37 VAL150150 Gas valve
38 TUB150200 Gas valve outlet pipe CS 80
38.1 TUB150250 Gas valve outlet pipe CS 90
RAVENHEAT CS 80/90 (T)
HIGH EFFICIENCY CONDENSING COMBINATION BOILER
SHORT LIST OF SPARE PARTS AND FLUE ACCESSORIES

57
Pos. Part. No. G.C.
Part. No.
Description
39 RAC150050 Air/gas mixer junction
40 ORI150050 Air/gas mixer junction O-ring
41 FOR150100 Air/gas mixer junction clip
42 MIX150050 CS 90 air/gas mixer
42.1 MIX150100 CS 80 air/gas mixer
43 ORI110050 Air/gas mixer - fan O-ring
44 VEN130100 Fan
45 GUA110052 Fan - burner gasket
46 CAN150100 Sensing electrode
47 CAN150070 Spark electrode
48 GUA150050 Sensing/spark electrode gasket
49 GUA150100 CS 90 burner gasket
49.1 GUA150120 CS 80 burner gasket
50 BRU150050 CS 80 burner
50.1 BRU150100 CS 90 burner
51 FLA110050 Flue fl ange
(FLA110052)
52 GUA110350 Flue fl ange gasket
53 GUA110250 Flue manifold washer
(GUA130050)
54 SON130050 Temperature fl ue sensor
55 GEN150100 Spark igniter
56 COL150050 Flue exhaust manifold
57 SCA150050 CS 80 main heat exchanger
57.1 SCA150100 CS 90 main heat exchanger
58 VAS150050 Expansion vessel
59 GUA050050 3/8” gasket
(GUA060111)
60 TUB150120 Expansion vessel pipe
61 GUA010050 1/4” gasket
62 TUB150110 Return pipe
63 GUA010310 1” gasket (GUA010311)
64 CIR150100 Pump
65 ORI150150 Pump O-ring
66 FOR150200 Pump clip
/ IMP150050 CS 80-90 (T) wiring harness

Part. No. Description
TER110101 1 metre high plume kit
CUR110050 45° fl ue exhaust defl ection bend
CUR11010 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
PR5094110A 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
Accessories concentric flue 80/125 (see sect. 5.18)
Part. No. Description
PR5094110A 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
SDO110100 Twin fl ue header F80/80
PRO110200 Straight pipe L1000 80
CUR110150 90° elbow bend 80
CUR110250 45° bend 80
GRI110050 Air inlet terminal 80
GRI110100 Exhaust terminal 80
TER060110 Vertical eccentric fl ue terminal
58

COD 0017LIB15007/0 01/2015
Chartists Way, Morley, Leeds, U.K. LS27 9ET
Telephone: 0113 252 7007
Fax: 0113 238 0229
Website: www.ravenheat.co.uk
E-mail: sales@ravenheat.co.uk
Ravenheat reserves the right to make changes and
improvements in our products which may affect the accuracy
of the information contained in this leafl et.

NOTE TO THE INSTALLER:
COMPLETE
THE BENCHMARK COMMISSIONING
CHECKLIST AND LEAVE THESE
INSTRUCTIONS WITH APPLIANCE
For assistance please call Ravenheat technical helpline:
telephone: 0113 252 7007
fax: 0113 238 0229
e-mail: sales@ravenheat.co.uk
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

63
© Heating and Hotwater Industry Council (HHIC)
www.centralheating.co.uk
Benchmark Commissioning and
Servicing Section
It is a requirement that the boiler is installed and commissioned to the
manuIacturers instructions and the data ¿elds on the commissioning checNlist
completed in full.
7o instigate the boiler guarantee the boiler needs to be registered with the
manufacturer within one month of the installation.
7o maintain the boiler guarantee it is essential that the boiler is serYiced annually
by a *as 6afe registered engineer who has been trained on the boiler installed.
7he serYice details should be recorded on the %enchmarN6erYice InterYal
5ecord and left with the householder.

THE WHITE BOILER COMPANY
$ll installations in (ngland and :ales must be noti¿ed to /ocal $uthority %uilding Control (/$%C) either directly or through a
Competent 3ersons 6cheme. $ %uilding 5egulations Compliance Cer ti¿cate will then be issued to the customer.
www.centralheating.co.uN
© Heating and Hotwater Industry Council (HHIC)
This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating
compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.
)ailure to install and commission according to the manufacturer¶s instructions and complete this %enchmarN Commissioning ChecNlist will inYalidate the
warranty. 7his does not affect the customer ¶s statutory rights.
GAS BOILER SYSTEM COMMISSIONING CHECKLIST
Customer name7elephone number
$ddress
%oiler maNe and model
%oiler serial number
Commissioned by (35I17 1$0()*as 6afe register number
Company name7elephone number
Company address
Commissioning date
To be completed by the customer on receipt of a Building Regulations Compliance Certi¿cate
%uilding 5egulations 1oti¿cation 1umber (if applicable)
CONTROLS (ticN the appropriate bo[es)
7ime and temperature control to heating
5oom thermostat and programmertimer 3rogrammable room thermosta t
/oadweather compensation Optimum start control
7ime and temperature control to hot water Cylinder thermostat and programmertimer Combination %oiler
Heating ]one YalYes Fitted 1ot required
Hot water ]one YalYes Fitted 1ot required
7hermostatic radiator YalYes Fitted 1
ot required
$utomatic bypass to system Fitted 1ot required
%oiler interlocN 3roYided
ALL SYSTEMS
7he system has been Àushed and cleaned in accordance with %6 and boiler manufacturer¶s instructions Yes
:hat system cleaner was used"
:hat inhibitor was used" 4uantity litres
Has a primary water system ¿lter been installed" Yes 1o
CENTRAL HEATING MODE measure and record
*as rate mñhr OR ftñhr
%urner operating pressure (if applicable) mbar OR *as inlet pressure mbar
Central heating Àow temperature C
Central heating return temperature C
COMBINATION BOILERS ONLY
Is the installation in a hard water area (aboYe ppm)" Yes 1o
If yes and if required by the manufacturer has a water scale reducer been ¿tted" Yes 1o
:hat type of scale reducer has been ¿tted"
DOMESTIC HOT WATER MODE 0easure and 5ecord
*as rate mñhr OR ftñ
hr
%urner operating pressure (at ma[imum rate) mbar OR *as inlet pressure at ma[imum rate mbar
Cold water inlet temperature C
Hot water has been checNed at all outlets Yes Temperature C
:ater Àow rate Imin
CONDENSING BOILERS ONLY
The condensate drain has been installed in accordance with the manufacturer¶s instructions andor %6%6 Ye s
ALL INSTALLATIONS
5ecord the following
$t ma[. rate CO ppm AND COCO
²
Ratio
$t min. rate (where possible) CO ppm AND COCO
²
Ratio
The heating and hot water system complies with the appropriate %uilding Regulations Yes
The boiler and associated products haYe been installed and commissioned in accordance with the manufacturer¶s instructions Yes
The operation of the boiler and system controls haYe been demonstrated to and understood by the customer Yes
The manufacturer¶s literature including %enchmarN ChecNlist and 6erYice Record has been e[plained and left with the customer Yes
Commissioning (ngineer¶s 6ignature
Customer¶s 6
ignature
(To con¿rm satisfactory demonstration and receipt of manufacturer¶s literature)
www.centralheating.co.uN

$ll installations in (ngland and :ales must be noti¿ed to /ocal $uthority %uilding Control (/$%C) either directly or through a
Competent 3ersons 6cheme. $ %uilding Regulations Compliance Certi¿cate will then be issued to the customer.
© Heatin
and Hotwater Industry Council (HHIC
It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed.
Service Provider
%efore completing the appropriate 6erYice Record below please ensure you haYe carried out the serYice as described in the manufacturer¶s instructions.
$lways use the manufacturer¶s speci¿ed spare part when replacing controls.
SERVICE RECORD
SERVICE 01
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$t ma[. rate CO ppm AND CO²%
$tmin.rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 02
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$t min. rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 03
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$tmin.rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 04
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$t min. rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 05
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$t min. rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 06
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$tmin.rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 07
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$t min. rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 08
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$tmin.rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 09
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$t min. rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature
SERVICE 10
'ate
(ngineer name
Company name
Telephone 1o
*as safe register 1o
Record
$tma[.rate CO ppm AND CO²%
$tmin.rate
(:here 3ossible) CO ppm AND CO
²
%
Comments
6ignature