CONDENSING FANNED FLUE BOILER
CSI PRIMARY
NATURAL GAS (G 20) (I 2H)
G.C.
LPG
G.C.
Listed by The United Kingdom Water
No41
(G 30
No41
Tested, certified and
service listed
Fitting Byelaws Scheme
581 05
- G 31)
581 06
CSI
(I3+)
CSI
INSTALLATION AND SERVICING INSTRUCTIONS
TO BE LEFT WITH USER
Technical and illustrative data are not binding and can be modified without prior notice.
The descriptions and illustrations in the present booklet are for guideline purposes only.
RAVENHEAT MANUFACTURING LTD., CHARTISTS WAY, MORLEY, LEEDS, LS27 9ET. - TELEPHONE (0113) 252 7007
CONDENSING SYSTEM INNOVATION
CENTRAL HEATING BOILER
This new super high efficient boiler is designed to meet heating requirements at super high efficiency,
unheard of only a few years ago.
POSITION
The appliance is extremely versatile as it can be fitted in almost any room. The appliance is room
sealed, there is no contact between combustion chamber and living accommodation. This guarantees
maximum safety and efficiency. Indeed, our depression/combustion front cover has been designed to
fit, achieving maximum air tight seal using screw down fasteners at 15 cm. This should not hinder
service of the appliance, but does ensure maximum efficiency and safety something which
Ravenheat take great pride in.
Each boiler has been designed and manufactured in our modern plant to exacting IS0 9001 discipline,
all boilers carry full CE marking of approval. Technical sales and commercial service are available
throughout the UK. This product is guaranteed by Ravenheat Manufacturing, Chartists Way, Morley,
LEEDS, LS27 9ET. Telephone No (0113) 252 7007.
BASIC COMPONENTS - (See figure 1)
Guarantee is a full 12 months from date of purchase providing the appliance has been fitted in
accordance with these instructions and relevant codes of practice.
MAJOR COMPONENTS
Gas valve.
Main burner with flame stabiliser designed to operate under all thermal conditions.
Primary heat exchanger constructed from copper.
Unique patented condensing heat exchanger for high thermal flue transfer gases to water
Aesthetically pleasing panels and controls.
On/Off ball valve for shutting off gas.
Programmable 7 day module with digital display (optional).
NOTE: Due to the high efficiency of this boiler a plume of water vapour will form at the flue
terminal during operation.
COSHH - CONTROL OF SUBSTANCES HARMFULTO HEALTH
IMPORTANT
This appliance contains materials that are indicated below.
It is the Users/Installers responsibility to ensure that the necessary personal protective clothing is
worn when handling, where applicable, the pertinent parts that contain any materials that could be
interpreted as being injurious to health and safety.
WARNING When installing the appliance, care should be taken to avoid any possibility of injury when
handling sheet metal parts.
GENERAL INFORMATION:
GLUES AND SEALANTS - exercise caution - if these are still in liquid form.
INSULATION PADS, CERAMIC FIBRE - may be harmful if inhaled, may be irritating to skin, eyes,
nose and throat.
When handling keep dust generation to a minimum, avoid inhaling and contact with skin or eyes.
When disposing of the product keep dust generation to a minimum and ensure that parts are securely
wrapped.
When servicing avoid inhalation by using a vacuum cleaner or in conjunction with other tools.
After handling wash hands and other exposed parts.
RAVENHEAT use only high quality material for production of this product, in an effort to protect the
environment components should be re-cycled.
3
SECTIONS:
1
2
3
4
5
6
7
8
9
10
11
GENERAL LAYOUT
TABLE OF CONTENTS
PAGE:
INTRODUCTION
6
DESIGN PRINCIPLES AND
OPERATING SEQUENCE
TECHNICAL DATA
GENERAL REQUIREMENTS
.
INSTALLATION
COMMISSIONING
SERVICING INSTRUCTIONS
FAULT FINDING
ELECTRICAL SYSTEM DIAGRAM
EXPLODED PARTS DIAGRAM
.
LIST OF SPARE PARTS
6
8-9
6
15
26
30
39
40
45
46
KEY
1
- Heat exchanger
3
-Burner
4
- Ignition pilot burner
6
- Condensing heat exchanger
9
- Ignition electrode
11
- Frame
4
15 - Heat control thermostat
22 - Overheat cut off thermostat
26 -Auto air vent valve
28 - Pressure switch
35 - Condensing trap
36 - Fan
38 - Sealed chamber
45 - Combustion chamber
50 - Flue gas exhaust hood
106 - Flue restriction ring
OPERATING SCHEME
Fig. 2
KEY
1 - Heat exchanger
3 - Burner
4 - Ignition pilot burner
5 Flue restriction ring
6 - Condensing heat exchanger
7 - Electronic ignition
8 Condensing trap
9 - Ignition electrode
12 - Gas valve
15 - Heat control thermostat
18 - Overheat cut-off thermostat
26 - Auto air vent valve
28 - Pressure switch
36 Fan
38 - Sealed chamber
SECTION
1 INTRODUCTION
1.1
The CSI Primary is a gas fired room sealed
fan assisted condensing heating boiler suitable for fully pumped open vented or sealed
system central heating and domestic hot
water systems.
1.2
The provision of stored domestic hot water
is possible by the addition of an indirect
cylinder with ‘Y’ or ‘S’ plan controls. The
data badge is placed on the front panel.
1.2.1
Fig. 1 illustrates the general layout of components.
Fig. 2 illustrates the operating principals
described in section 2.
SECTION
2 DESCRIPTION OF CONTROL SYSTEM
AND SEQUENCE OF OPERATION
2.1
If the main neon is on with a demand for
heat to the system (radiators etc.) the fan
operates via the pressure switch and sends
a signal back to the ignition board that the
fan is running at maximum speed.
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
The fan also forces exhaust gas through the
flue 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 time clock. The burner contin-
ues to operate until it is stopped by the
timer or one of the thermostats.
When the room thermostats and/or timer
intervene the main burner shuts down. The
fan stops and the pump off via the pump
overrun.
The condensate trap is fitted with a block-
age safety sensor. This prevents the boiler
operating should there be a blockage in the
condensate discharge trap.
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.3
2.3.1
The spark ignition system is powered which
in turn commences the spark ignitor to
operate and light the burner. At this point
the ignition board opens the gas valve to
light the pilot/burner.
When the electrode/senor sensors the sig-
nal of the pilot/burner it opens the second
stage of the gas valve via the ignition board
on minimum power. Upon the second valve
opening the spark ignition stops.
From the minimum gas rate setting and
after a few seconds the gas gradually starts
to increase to maximum set required power
until it’s maximum regulated temperature.
When the boiler thermostat is satisfied the
boiler will go to rest mode, the main burner
is shut down and the pressure switch will
return back to its rest mode.
A pump overrun will operate the pump for
about 1 minute if the temperature of water
in the boiler is above 78
o
C, after this water
is dispersed the pump will stop.
The boiler is fitted with a thermostatic anti-
cycle device, this delays the boiler from
refiring until the return water temperature is
reduced.
GENERAL FUNCTION
The gas valve boiler output settings may be
adjusted to requirements other than factory
settings.
3.2.1
An overheat cut off thermostat set slightly
higher than the heat thermostat acts to
turn off the burner to resetable “lockout”
(Fig. 50) 3.
SECTION
4 GENERAL REQUIREMENTS
4.0
SAFETY
Gas Safety (Installation and USE) Regulations, 1994, and amendments 1996.
It is law that all gas appliances are installed
and serviced by a Corgi registered installer
(identified by ) in accordance with the
above regulations. Failure to install appliances correctly could lead to prosecution. It is
in your own interest, and that of safety, to
ensure the law is complied with. Check the
boiler and flue is the correct type for installation.
The installation of the boiler MUST also be
in accordance with the latest I.E.E (BS
7671) Wiring Regulations, local building
regulationsbye-laws of the local water
authority, the building regulations and the
Building standards (Scotland) and any rele-
vant requirements of the local authority.
4.1
GENERAL INFORMATION
Both the user and the manufacturer rely
heavily on the installer, whose job it is to install the combination boiler and connect it to
a correctly designed heating system. Acquaint yourself with the British Standards
concerning installation requirements. If you
need advice on any points your Ravenheat
Technical Services Office would be pleased
to help. It is recommended that tools suitable
2.3.2
6
Air is drawn by the fan for combustion.
OVERALL DIMENSION
Fig. 3
PRESSURE DROP ACROSS APPLIANCE
Fig.
5
BS. 5440:2 Ventilation (for gas appliances
DD 189:1 1990 Discharge of condensate
Health & Safety Document No. 635
The Electricity at Work Regulations, 1989.
The manufacturer’s notes must NOT be
taken, in any way, as overriding statutory
obligations.
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 war-
ranty. It could also infringe the Gas Safety
regulations and the above regulations.
of rated input not exceeding
60
kW).
for brass fittings are used, and have a capability to accomodate hexagon sizes up to 50
mms.
CODES OF PRACTICE/Fief: Documents
Detailed recommendations are contained in
the following British Standard Codes of
Practice:
BS. 6891
BS. 6798
BS. 5449
BS. 5546
Low pressure installation pipes.
Installation of gas fired hot
water boilers of rated input not
exceeding 60 kW.
Forced circulation hot water
systems.
Installation of gas hot water
supplies domestic purposes
(2nd Family Gases).
4.2
4.2.1
4.3
NOTE: The Ravenheat CSI Primary boiler
has been tested and examined by BG, and
is certified to comply with PrEN 483.
Manufacturers instructions must NOT be
taken in any way as overriding statutory
obligations.
If in doubt on any point please consult
Ravenheat Manufacturing Ltd.
LOCATION OF BOILER
Siting of Ravenheat CSI Primary Boiler
must be as follows. The position of installation should be within the building, unless
otherwise protected by suitable enclosure.
Adequate space for installation, servicing
and air circulation around boiler must be
allowed for.
The Ravenheat CSI Primary must be fitted
on a flat and vertical wall capable of ade-
quately supporting the weight of the boiler
and any ancillary equipment.
The appliance may be installed on a
combustible wall subject to the require-
ments of the Local Authority and Building
Regulations.
LPG versions of this appliance shall not
be installed in cellars or basements.
CLEARANCES AROUND THE
APPLIANCE
BS. 5440:
1 Flues (for gas appliances of
rated input not exceeding
60
kW).
4.3.1
The following minimum free spaces, re-
quired for installation inspection and servic-
ing, must be left around the boiler:
7
SECTION 3 TECHNICAL DATA
TABLE 1
NATURAL GAS (G 20) I
NOMINAL HEAT INPUT NET
MINIMUM HEAT INPUT NET
NOMINAL HEAT OUTPUT
NOMINAL HEAT OUTPUT CONDENSING
MINIMUM HEAT OUTPUT
MINIMUM HEAT OUTPUT CONDENSING
GAS RATE max
AFTER 10 MINUTES
INLET PRESSURE 20 mbar
BURNERPRESSURE
MAIN BURNER INJECTORS
PILOT BURNER INJECTOR
ELECTRICAL SUPPLY
min
max
min
Nr. 13 x 1.25
0.27 x 2 HOLES
230V-50HZ
2H
24.8 kW
13.0 kW
(84,500 Btu/h)
(44,500 Btu/h)
23.8 kW (81,200 Btu/h)
25.6 kW
11.7 kW
13.4 kW
3
S/h
2.5 m
3
1.3 m
S/h
(87,200 Btu/h)
(40,100 Btu/h)
(45,700 Btu/h)
(88.25 ft3/h)
(45.9 ft3/h)
(8.0 in w.g.)
10.5 mbar
2.0 mbar
(4.2 in w.g.)
(0.8 in w.g.)
POWER CONSUMPTION
EXTERNAL FUSE RATING
INTERNAL FUSE 4 A
DRY WEIGHT
WATER CONTENT C.H.
GAS SUPPLY CONNECTION
FLOW CONNECTION C.H.
RETURN CONNECTION C.H.
CONDENSATION DRAIN
6OW
3A
(20 mm to BS 4265)
kg 35
litre 0.5
1/2" RC
22 mm
22 mm
3/4" (21.5 mm) push fit over flow
SEALED WATER SYSTEM C.H.
MAX PRESSURE PHS
MINIMUM WORKING PRESSURE
CENTRAL HEATING OPERATING TEMPERATURE MAX 85
2.5 bar
0.5 bar
o
C
MIN 62°C
o
DESIGN FLOW RATE 1023 I/h (225 gals/h) 20
C RISE
MINIMUM FLOW RATE C.H. 503 I/h (111 gals/h)
FLUE OUTLET NOM. DIAMETER 100 mm specially supplied with boilers
(35.6 p.s.i.)
(7.35 p.s.i.)
DESTINATION: AT. CH. DK. ES. FI. GB. IE. IT. PT. SE.
FLUE TYPE - C12 - C32 - C
CATEGORY
I
2H
52
8
NOX 2
SECTION 3 TECHNICAL DATA
TABLE l/A
LPG (G 30 - G 31) I
NOMINAL HEAT INPUT NET
MINIMUM HEAT INPUT NET
NOMINAL HEAT OUTPUT
NOMINAL HEAT OUTPUT CONDENSING
MINIMUM HEAT OUTPUT
MINIMUM HEAT OUTPUT CONDENSING
GAS RATE
AFTER 10 MINUTES
INLET PRESSURE
BURNER
PRESSURE
max
min
37 mbarG31
max
min
MAIN BURNER INJECTORS
PILOT INJECTOR
ELECTRICAL SUPPLY
G
31
G 31
Nr. 13 x 0.75
0.22 x 1 HOLE
230V-50HZ
3+
24.8 kW
13.0 kW
24.1 kW
11.7 kW
13.4 kW
G
30
0.95
m3S/h
(33.53 ft3/h)
0.79
0.5 m3S/h (17.65 ft3/h) 0.4 m3/h (14.12 ft3/h)
G
28 - 30 mbar
35.4 mbar (14.0 in w.g.)
7.3 mbar (2.92 in w.g.)
30
G 30
27.3 mbar (10.9 in wg.)
7.0 mbar (2.8 in w.g.)
m3/h
(84,500 Btulh)
(44,500 Btulh)
(82,100 Btulh)
(87,200 Btu/h)
(40,100 Btulh)
(45,700 Btu/h)
(27.89
ft3/h)
POWER CONSUMPTION
EXTERNAL FUSE RATING
6OW
3A
INTERNAL FUSE 4 A (20 mm to BS 4265)
DRY WEIGHT kg 35
WATER CONTENT C.H. litre 0.5
GAS SUPPLY CONNECTION
FLOW CONNECTION C.H.
RETURN CONNECTION C.H.
CONDENSATION DRAIN
1/2" RC
22 mm
22 mm
3/4" (21.5 mm) push fit over flow
SEALED WATER SYSTEM C.H.
MAX PRESSURE PMS
2.5 bar (35.6 p.s.i.)
MINIMUM WORKING PRESSURE 0.5 bar
O
CENTRAL HEATING OPERATING TEMPERATURE MAX 85
C
MIN 62°C
O
DESIGN FLOW RATE 1023 I/h (225 gals/h) 20
C RISE
MINIMUM FLOW RATE C.H./503 Lts/h (111 gals/h)
FLUE OUTLET NOM. DIAMETER 100 mm specially supplied with boilers
(7.35 p.s.i.)
DESTINATION: BE. CH. ES. FR. GB. IE. IT. PT.
FLUE TYPE - C52 - C32 - C
52
CATEGORY l3+
NOX 2
9
4.4
4.4.1
18 inches (450 mm) in front
5 inches (125 mm) above,
6 inches (150 mm) below
0.2 inches (5 mm) on each side
1 inch (25 mm) in front when installed in a
cupboard.
IMPORTANT NOTICE
If the boiler is to be fitted in a timber framed
building it should be fitted in accordance
with the British Gas Publication Guide for
Gas Installations in Timber Frame Housing
Reference DM2. If in doubt advice must be
sought from the local gas supplier.
The boiler may be installed in any room
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
tion 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,
electrical switch or appliance control,
ing mains electricity should be so situated
that it cannot be touched by a person
a bath or shower.
A compartment used to enclose the boiler
MUST be designed and constructed
ically for this purpose. An existing cupboard,
or compartment, may be used provided it
modified accordingly. Samples of the CSI
boiler have been examined by B.G.Technol-
ogy Notified Body, and is 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 Com-
patibility 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.
combina-
any
utilis-
using
specif-
or
tion must be tested for soundness as
described in the above Code.
N.B. if the gas supply for the boiler serves
other appliances ensure an adequate sup-
ply is available both to the boiler and the
other appliances when they are in use at
the same time.
4.6 FLUE SYSTEM
4.6.1
is
The terminal should be located where dis-
persal of combustion products is not imped-
ed and with due regard for the damage or
discolouration that might occur to building
products in the vicinity (see fig. 6).
The terminal must not be located in a place
where it is likely to cause a nuisance.
In cold and/or humid weather water vapour
may condense on leaving the flue terminal.
The effect of such steaming must be con-
sidered.
The terminal must not be closer than 25
mm (1 in) 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 alumini-
um 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 flue lengths see twin flue
instructions.
Flue must be positioned in a place not likely
to cause a nuisance.
4.5
4.5.1
10
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. Pipework from the meter to
the boiler must be of adequate size (22 mm)
min. To within at least 3 metre of the boiler
(15
mm) min. can then
ing pipe work to the appliance. A smaller
size than the boiler inlet gas connection
should not be used. The complete installa-
be used for remain-
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 opening are specified in Fig. 6.
Note positions: Due to the terminal design,
installation is
than those specified in BS 5440, Part 1.
possible with clearances less
NOTE:
The flue must be terminated in a place not
likely to cause a nuisance:
Fig. 6
4.6.2
4.7
4.7.1
4.8
4.8.1
Fig. 6A
A concentric vertical flue kit is available: for
flueing applications up to a maximum height
of 4.0 metres.
For further details see vertical flue installa-
tion instructions.
AIR SUPPLY
The following notes are intended for gener-
al guidance.
The room sealed fan flued boiler does not
require a permanent air vent for combustion
air supply.
Where installed in a cupboard or compart-
ment ventilation is not required.
CONDENSATE DRAIN
A condensate drain is provided on the boiler.
This drain must be connected to a drainage
point. All pipework and fittings in the condensate drainage system MUST be made of
plastic no other materials may be used.
Discharge of condensate DD 189:1990.
The drain outlet on the boiler is standard
3/4" (21.5 mm) push fit overflow pipe.
NOTE: Condensate drain pipework must
never be less than 15 mm.
Important: any external runs must be carried out in 1 1/4 (32 mm) wastepipe.
A fall of 2.5” (45 mm/m) all runs must have.
WATER CIRCULATION (central heating)
Detailed recommendations are given in BS
6798 5449.1.1977 (for smallbore and
microbore central heating systems). The following notes are given for general guidance.
Terminal position for fan assisted boiler
(minimum
A
B
C Below eaves
D
E From vertical drain pipes and soil pipes
F
G - Above ground or below balcony level
H
I
J From an opening in the car port (e.g. door
K
L
4.8.2
distance)
- Directly below an open window or other
opening (e.g. air brick)
Below gutters, soil pipes or drain pipes
Below balconies or car port roof
From internal or external corners
- From a surface facing a terminal
From a terminal facing a terminal
window) into dwelling.
Vertically from a terminal on the same wall
- Horizontally from a terminal on the same wall
Pipework
Copper tubing to BS 2871 1.1 .1971 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 points and water flows naturally to
drain taps. It should be ensured as far as
possible that the appliance heat exchanger
is not a natural collecting point for air.
Except where providing useful heat, pipes
should be insulated to prevent heat loss
and to avoid freezing. Particular attention
should be paid to pipes passing through
ventilated spaces in roofs and under floors.
11
WATER SYSTEM
4.8.2.1
4.8.2.2
4.8.2.3
4.8.2.4
WATER SYSTEM
For an open (vented) system the boiler
must be supplied from an unrestricted
water supply taken from a feed and expansion tank (minimum 22 litre 5 gall) capacity
situated at a maximum height of 27.5 metre
(90ft) above the boiler. The cold feed supply
must be 15 mm minimum size. It is important that the relative positions of the pump,
cold feed and open vent. See Fig. 6D.
CYLINDER
The hot water cylinder must be a double
feed (fully indirect) type.
SEALED WATER SYSTEMS
The installalation should comply with the
appropriate requirements of BS5449 Part 1
and BS6798, see Fig. GE. All valves and fittings must be suitable for use on sealed
systems.
SAFETY VALVE
The safety valve must be fitted in a sealed
system. The safety valve must Conform to
BS6759 Part 1 and be fitted to the require-
ments of BS6798.
4.8.2.5
4.8.2.6
4.8.2.7
EXPANSION VESSEL
A diaphragm type expansion vessel, conforming to BS4814 must be connected at a
point close to the inlet side of the circulating
pump, see Fig. 6E or as laid down by the
manufacturer.
The expansion vessel must suit the volume
of water in the system, see BS5449 Part 1
clause 25 for details. The charge pressure
must not be less than static head i.e. the
height of the highest point of the system
ABOVE the expansion vessel.
The expansion vessel should have sufficient capacity to accept the volume change
when the water is heated from 10
o
C. Refer to BS5449 Part 1 for specific
o
C to 110
details. See Table 3.
PRESSURE GAUGE
A pressure gauge with set pointer and covering at least the range 0 to 4 bar (0 to 60
2
) shall be permanently fitted to the sys-
Ib/in
tem in a position it can be seen when carry-
ing out the filling operation.
SYSTEM DESIGN
Fig. 6A illustrates typical heating only layout, Figs 6B and 6C illustrate typical layout
with ‘Y’ or ‘S’ plan system.
Fig. 6D
Open (vented) system pipework requirements
4.8.3
12
The waler through the appliance heat
exchanger circuit must exceed the mm 1.84
gals.min. (503 It/h) when the burner is firing.
It is important to ensure that this rate is
achieved when sections of the system are
shut of: either manually or bu automatic
controls. Therefore a by-pass must be fit-
ted to the system (15 mm min) (Fig. 6A).
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.
4.8.4. Draining tap
These must he 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.
4.8.5
Air release points
These must be fitted at all high points where
air will naturally collect, and must be sited to
facilitate complete fitting of the system.
4.8.7 Mains water feed: central heating
There must be no direct connection to the
mains waler supply, even through a nonreturn valve, without the approval of the
Local Water Authority.
4.8.8 Permissible methods of filling
Cistern method (Fig. 8).
The system may be filled by one of the following methods. Through a cistern used for
no other purpose. via a hallvalve permanently connected directly to a service pipe
and/or cold water distributing pipe. The static head available from the cistern should
be adequate 10 provide the initial system
design pressure.
The cold feed pipe from the cistern should
include a non-return valve. and a stop-valve
with an automatic air vent connected between them, with the stop valve being located, between the cistern and the automatic
air vent. The stop valve may remain open
during normal operation of the system, if
automatic water make-up is required.
Booster pump method (Fig. 8).
Fig. 8
13
SIZING OF EXPANSION VESSELS: TABLE 3
Safety
valve setting (bar)
Vessel charge
pressure (bar)
Initial system
pressure (bar)
Total water
content Of system
Litres
25 2.1 3.5 6.5 13.7 2.7 4.7 10.3 3.9 8.3
50 4.2 7.0 12.9 27.5 5.4 9.5 20.6 7.8 16.5
75 6.3 10.5 19.4 41.3 8.2 14.2 30.9 11.7 24.8
100 8.3 14.0 25.9 55.1 10.9 19.0 41.2 15.6 33.1
125 10.4 17.5 32.4 68.9 13.6 23.7 51.5 19.5 41.3
150 12.5 21 .0 38.8 82.6 16.3 28.5 61.8 23.4 49.6
175 14.6 24.5 45.3 96.4 19.1 33.2 72.1 27.3 57.9
200 16.7 28.0 51.8 110.2 21.8 38.0 82.4 31.2 66.2
225 18.7 31.5 58.3 124.0 24.5 42.7 92.7 35.1 74.5
250 20.8 35.0 64.7 137.7 27.2 47.5 103.0 39.0 82.7
275 22.9 38.5 71.2 151.5 30.0 52.2 113.3 42.9 91.0
300 25.0 42.0 77.7 165.3 32.7 57.0 123.6 46.8 99.3
325 27.0 45.5 84.1 179.1 35.7 61.7 133.9 50. 7 107.6
350 29.1 49.0 90.6 192.8 38.1 66.5 144.2 54.6 115.8
375 31.2 52.5 97.1 206.6 40.9 71.2 154.5 58.5 124.1
400 33.3 56.0 103.6 220.4 43.6 76.0 164.8 62.4 132.4
42 5 3 5.4 5 9. 5 110.1 239.2 46.3 80.7 175.1 66.3 140.7
450 37.5 63.0 116.5 247.9 49.0 85.5 185.4 70.2 148.9
475 39.6 66.5 123.0 261.7 51.8 90.2 195.7 74.1 157.2
500 41.6 70.0 125.9 275.5 54.5 95.0 206.0 78.0 165.5
For system volumes
other than those given
above, multiply the 0.0833 0.140 0.259 0.551 0.109 0.190 0.412 0.156 0.331
system volume by
the factor across
3.0
0.5
0.5
1.0
1.0 1.5 2.0 1.0 1.5 2.0 1.5 2.0
EXPANSION VESSEL VOLUME (LITRES)
1.5
Note: This pressure can be increased up to 1.5 bar to suit high static head situations. see item 10, other appliance components in the
SERVICING INSTRUCTIONS.
The system may be filled through a self
contained unit comprising of a cistern pressure booster pump if required and if neces-
sary an automatic pressure reducing valve
or flow restrictor. The cistern should be supplied through a temporary connection from
a service pipe or cold water distributing
pipe. The unit may remain permanently connected to the heating system to provide limited automatic water make up.
ments of BS 1010 Part 2 (the temporary
hose from the draw off tap shall be con-
nected to this fitting).
b) A test clock.
c) Double check valve of an accepted type.
d) A non return valve of an accepted type.
We recommend use of a Ravenheat
Filling Loop designed for this method of
filling the system. Available from your
supplier.
Mains topping up method (Fig. 9).
Here the temporary connection is supplied
from a service pipe, or distributing pipe,
which also supplies other draw-off points at
a lower level.
A combined double check valve shall be
installed upstream of the draw-off point,
through a temporary hose connection from
a tap supplied from the mains, where the
mains pressure is excessive a pressure
reducing valve shall be used to make filling
easier. The following fittings shall form a
permanent part of the system and shall be
fitted in the order stated.
a) A stop valve complying with the require-
PROVISIONS FOR MAKE UP WATER
(Fig. 7)
Provision can be made for replacing water
loss from the system either.
A) from a manually filled made up bottle
with a readily visible water level. The bottle
should be mounted at least 150 mm (6 in)
above the highest point of the system and
be connected through a non return valve to
the return side of the heating system.
B) Where fitting a make up vessel would be
difficult re pressurisation of the system can
be done. See section on FILLING.
If the capacity of the central heating system
14
4.8.9
should exceed 110 litres, an additional ves-
sel should be installed on the return to the
combination boiler from the heating system
(Fig. 7). Guidance on vessel sizing is given
in (Table 3).
Reference should be made to British Gas
Publications <<(Material and Installation
Specifications for Domestic Central Heating
and Hot Water>>. Draining taps should be at
least l/2" in BSP nominal size and be in
accordance with BS 2879.
Installation to an existing central heating
system
Before installing a new boiler to an existing
system, flush out the old system with a recommended descaling agent.
It is most important that the correct concentration of the water treatment product is
maintained in accordance with the manufacturers’ instructions.
If the boiler is installed in an existing system
any unsuitable additives MUST be removed
by thorough cleansing.
BS 7593:1992 details the steps necessary
to clean domestic central heating svstem.
Also check pipework and renew any corroded pipework or fittings. Valve glands must
be repacked or replaced wherever neces-
sary and any defective controls exchanged.
adjacent to the appliance except, where the
appliance is installed in a bathroom, this
MUST be sited outside the bathroom.
SECTION 5 INSTALLATION
5.1
5.1 .1
WARNING
It is MOST IMPORTANT that this appliance
is installed in a VERTICAL POSITION, with
the flue air duct passing through the wall.
Make sure flue slopes 2.5
the boiler that is 45 mm/m fall per metre
of flue length.
Fig. 10
o
down towards
4.10
4.10.1
WATER TREATMENT
This boiler has a secondary ALUMINIUM
alloy heat exchanger Ravenheat recommended only the use of FERNOX-COPAL
SENTINEL Xl00 or SALAMANDER COR-
ROSION GUARD water treatment products,
which must be used in accordance with the
manufacturers instructions. For further
information contact:
Fernox Manufacturing Co. Ltd.
Tel. 01799 550811
Sentinel Division Betz Dearborn Ltd.
Tel. (0151) 424 5351
Salamander (Eng) Ltd
Tel. (0121) 3780952/4508
ELECTRICAL SUPPLY
Warning: this appliance must be earthed
Fig. 11
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.
The Ravenheat boiler is supplied for con-
nection to a 230 V - 50 Hz single phase
supply. The supply must be fused at 3 A.
NOTE: The method of connection to the
electricity supply MUST facilitate complete
electrical isolation of the appliance, by the
use of a fused, double pole isolator, having
a contact separation of at least 3 mm in all
poles. The point of connection to the elec-
tricity supply must be readily accessible and
15
5.2
5.2.1
DELIVERY
The appliance will arrive on site in two
cartons
Box 1 of 2 containing (Fig. 1O):
a) boiler fully assembled
b) installation instructions and
user instructions
c) white paper template
d) terminal cover plate (Fig. 12)
e) - 4 conch bolts and wall plugs
-screws and dowels
Polythene bag containing (Fig. 11):
a) l-112” BSP Union Gas Cock
d) 2.22 mm flanged copper tails complete
with 3/4" brass nuts and washers
Box 2 of 2 containing (Fig. 12):
Horizontal CSI flue kit
57 - Flue bend assembly
58 - Header gasket
59 - Rubber seal 0 60
60 -Air intake duct
61 - Flue exhaust duct
62 - Terminal
65 - Pipe centering spring
66 - Flue gas sample point
127 Terminal Cover Plate
(Contained in the carton Fig. 10)
WARNING:
Maximum allowable flue length 2.5 m.
maximum No. 2x1000 mm.
Flue duct extension used with Standard flue
Fig. 13
Fig. 12
OPTIONAL EXTRAS:
Small carton containing: (Fig. 13)
57 - Straight header supplied as an extra cost Only
when requested
59 - Rubber seal 60
66 - Flue gas sample point
FLUE EXTENSION BOX CONTAINING (Fig. 14)
1000 mm flue extension duct as an extra cost only
when requested for side and vertical flue applications
Fig. 14
59 - Rubber seal 60
63 - Air intake duct extension
64 - Flue exhaust duct extension
65 - Pipe centering spring
16
Loading...