Biasi RIVA ADVANCE HE M110B.24SR User manual

Wall hung, fan flue, room sealed, high efficiency gas boiler
User manual and
Installation instructions
RIVA ADVANCE HE
Models
M110B.24SR/C
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Congratulations on your choice.
RIVA ADVANCE HE are condensing high efficiency sealed chamber fan flue gas boilers.
They are fully electronically controlled and have electronic ignition.
Thematerialstheyaremadeofandthecontrolsystems they are equipped with give you safety,
a high level of comfort and energy savings to allow you to get the greatest benefit out of
independent heating.
RIVA ADVANCE HE allow a higher efficiency by reducing the flue gas temperature such that
the water vapour formed during the combustion is condensed out.
This allows a gain of useful heat that otherwise would be lost.
Remember that...
nThe manual
--- must be read thoroughly, so that you will
be able to use the boiler in a safe and sen-
sible way;
--- must be carefully kept. It may be necess-
ary for reference in the future.
nFirst lighting up must be carried out by
competent and responsible engineer.
nThe manufacturer
--- disclaim all liability for any translations of
the present manual from which incorrect in-
terpretation may occur
--- cannot be held responsible for non---ob-
servance of instructions contained in this
manual or for the consequences of any pro-
cedure not specifically described.
Using the boiler...
nBefore lighting the boiler you are ad-
vised to have a professionally qualified per-
son check that the installation of the gas
supply
--- is gas---tight;
--- is of the correct gauge for the flow to the
boiler;
--- is fitted with all the safety and control de-
vices required by the current Regulations.
nEnsure that
--- check with the Installer that he has con-
nected and terminated the pressure relief
valve in a manner which allows safe dis-
charge. The manufacturers are not respon-
sible for damage caused by opening of the
pressure relief valve and consequent escape
of water, if this is not connected and termin-
ated.
--- the installer has connected the conden-
sate outlet to a suitable drain pipe.
nOn detecting the smell of gas
--- don’t operate any electrical switches, the
telephone or any device that may produce
sparks;
--- open the windows and doors at once to
create a draught of air which will purge the
area;
--- shut off the gas cocks;
--- get the assistance of a qualified person.
nDo not touch the appliance with parts of
thebodythatarewetordampand/orbare
feet.
nDo not block or modify the condensate
outlet and pipework
nIn case of structural work or mainten-
ance near the exhaust duct and/or fume ex-
haust devices or their attachments, turn off
the appliance. On completion of the work,
have a professionally qualified person check
their efficiency.
nRepairs (under guarantee) must be car-
ried out only by an approved engineer, using
genuine spare parts. Thus do no more than
switching off the boiler yourself (see the in-
structions).
nYour boiler allows heating up of water to
a temperature less than boiling point;
--- must be connected to a central heating
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

system and/or a hot water supply system,
compatible with its performance and output;
--- can be used only for those purposes for
which it has been specially designed;
--- must not be touched by children or by
those unfamiliar with its operation;
--- must not be exposed to weather condi-
tions.
nDuring the operation it is quite normal
that the boiler produces a white plume of
condensation vapour from the flue terminal.
This is due to the high efficiency of the ap-
pliance and may be particularly evident with
low outdoor temperatures.
Safe handling of
substances
Biasi products are manufactured in accordance
with ISO 9000 and do not, and will not, contain any
hazardous materials or substances such as as-
bestos, mercury or C.F.C.’s.
The appliance packaging does not contain any
substances, which may be considered a hazard to
health.
Combustion chamber panels
Material: mineral fibres
Known hazards --- Some people can suffer red-
dening and itching of the skin. Fibre entry into the
eye will cause foreign body irritation, which can
cause severe irritation to people wearing contact
lenses. Irritation to respiratory tract.
Precautions --- Dust goggles will protect eyes.
People with a history of skin complaints may be
particularly susceptible to irritation. High dust le-
vels are only likely to arise following harsh ab-
rasion. In general, normal handling and use will
not present high risk, follow good hygiene prac-
tices, wash hands before, touching eyes, consum-
ing food, drinking or using the toilet.
Firstaid --- Medicalattentionmustbesoughtfol-
lowing eye contact or prolonged reddening of the
skin.
Thermostat / Temperature gauge
Description --- Sealed phial and capillary contain-
ing liquid.
Known hazards --- irritating to skin, eyes and
throat. Vapour is harmful. Inflammable --- do not
extinguish with water.
Precautions --- Do not incinerate. Avoid contact
with broken/leaking phials. Do not purposely
puncture.
Firstaidmedicalattentionmustbesoughtfollow-
ing eyes/skin contact, wash with clean water.
Appliance category II2H3P (GasG2020mbar,G3137mbar)
Country of destination: United Kingdom (GB) Ireland (IE)
This appliance conforms with the following EEC directive:
DGas appliance Directive 90/396/CEE
DBoiler Efficiency Directive 92/42/CEE
DElectromagnetic Compatibility Directive 89/336/CEE
DLow voltage Directive 73/23/CEE
The manufacturer, in the continuous process to improve his products, reserves the right to modify the
data expressed in the present documentation at any time and without prior notice.
The present documentation is an informative support and it cannot be considered as a contract to-
wards third parties.
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Boiler installation and commissioning tips
nThe installation must be carried out by
a qualified person who will be responsible for
observing the current Regulations.
Installing the boiler...
nDonotforgettoremovethetransitcaps
and plugs from the boiler connections these
are fitted to every boiler.
nKeep the boiler clear of dust during in-
stallation and in particular do not allow any
dust or debris to enter the top of the boiler
where the flue connection is made. It is rec-
ommended that you put a dust sheet over the
top of the boiler until you are ready to make
the flue connection.
nBecause every boiler is fired and tested
live at the factory, a small amount of water re-
mains within the boiler. It is possible for this
water to initially cause the pump to seize. It is
therefore recommended that the pump rotor
be manually turned to free its rotation before
turning the boiler on.
nRemember to release the auto air purge
before filling the boiler. See the instructions to
identify the location of this device.
nThis boiler allows to control the flow tem-
perature of the central heating system at very
low levels.
In case of underfloor heating system a tem-
perature limiting device (e.g. a safety thermo-
stat) is recommended to stop the boiler in
case that the water temperature exceeds the
design temperature.
nYou are strongly advised to flush out the
system both cold and hot in order to remove
system and installation debris.
nIt is also sensible to initially fire and com-
mission the boiler before connecting any ex-
ternal controls such as a room thermostat. By
this method if you have a subsequent prob-
lem following the addition of an external con-
trol you can eliminate the boiler from your
fault analysis.
nIf the boiler is fitted with a digital pro-
grammer, when setting the times for auto-
matic operation, remember that for every
“ON” time there must be an “OFF” time to fol-
low and that on every occasion you enter a
time you must also indicate which days that
you want the boiler to follow the timed set-
tings.
nSome products incorporate an anti cycl-
ing time delay. It is normal when first switch-
ing the boiler on for the boiler to operate on
heating for a few seconds then switch off.
After 3--- 4 minutes has elapsed the boiler will
then re ignite and operate perfectly normally.
The ignition delay cycle does not prevent
normal operation of the boiler to provide
d.h.w.
nIf you are in any doubts as to the installa-
tion or operation of the boiler please read the
instruction manuals thoroughly and then if
necessary contact Biasi UK for advice and
assistance.
Please remember that if you are in any doubt about the installation of this product you can contact our
Technical Helpline on tel. [phone]
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

TABLE OF CONTENTS
1
1 Appliance description 2..........
1.1 Overview 2......................
1.2 Control panel 2..................
1.3 Isolation valves 2.................
1.4 Technical data 2.................
1.5 Operation lights 3................
2 Instructions for use 4............
2.1 Warnings 4......................
2.2 Refilling procedure 4..............
2.3 Ignition 4........................
2.4 C.h. circuit temperature 5..........
2.5 Extinguishing 6..................
3Usefuladvice 7.................
3.1 Central heating 7.................
3.2 Frost protection 7................
3.3 Condensate drain 7..............
3.4 Periodic maintenance 7...........
3.5 External cleaning 7...............
3.6 Operational faults 7...............
4 Technical information 9..........
4.1 Overview 9......................
4.2 Main diagram 10..................
4.3 Hydraulic specifications 11.........
4.4 Expansion vessel 11...............
4.5 Technical data M110B.24SR/... 12...
5 General requirements 14..........
5.1 Related documents 14.............
5.2 Location of appliance 14...........
5.3 Flue system 14....................
5.4 Gas supply 15....................
5.5 Air supply 15.....................
5.6 Ventilation 15.....................
5.7 Condensate drain 15..............
5.8 Water circulation (c.h.) 16...........
5.9 Water treatment 17................
5.10 Electrical supply 17................
6 Installation 18....................
6.1 Warnings 18......................
6.2 Precautions for installation 18.......
6.3 Installing the bracket 18............
6.4 Overall dimensions 19.............
6.5 Joints 19.........................
6.6 Mounting the boiler 19.............
6.7 Fitting the flue system 19...........
6.8 Choice of flue 20..................
6.9 Electrical connections 21...........
6.10 External frost protection 23.........
6.11 Connecting a system boiler to a cylinder .
24
7 Commissioning 27...............
7.1 Electrical installation 27............
7.2 Gas supply installation 27..........
7.3 Initial filling of the system 27........
7.4 Condensatepipeandtraps 28......
7.5 Lighting the boiler 28..............
7.6 Checking the gas supply pressure 29
7.7 Maximum output in c.h. mode 30....
7.8 External temperature probe setting (op-
tional) 30.........................
7.9 Checking the ignition device 31.....
7.10 Checking the flue system 31........
7.11Checkingthecondensatedrainpipe ....
31
7.12 Instructing the user 32.............
8 Gas conversion 33...............
8.1 Warnings 33......................
8.2 Procedures 33....................
9 Maintenance 36..................
9.1 Warnings 36......................
9.2 Dismantling the external panels 36...
9.3 Emptying the d.h.w. system 36......
9.4 Emptying the c.h. system 36........
9.5 Combustion analysis check 37......
9.6 Cleaning the condensing heat exchanger
and burner 37....................
9.7 Checking the pressurisation in the expan-
sion vessel 38....................
9.8 Cleaning the burner 38.............
9.9 Checking the flue 38...............
9.10 Drain pipe inspection 38............
9.11 Visual inspection of appliance 38....
9.12 Gas pressures and soundness 38...
9.13 Water inhibitor concentration 38.....
Abbreviations used in the manual:
C.h. = Central heating
D.h.w. = Domestic hot water
D.c.w. = Domestic cold water
USE
INSTALLATIONMAINTENANCE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

2
1 Appliance description
1.1 Overview
2
1
3
Fig. 1.1
1 Case front panel
2 Control panel
3 Control panel cover
1.2 Control panel
4 C.h. circuit temperature and pressure gauge
5 Lock --- out signal lamp
6 Lockout reset button
7 Function selector and c.h. temp. control knob
8Serviceknob
9 Appliance operation lights
The service knob 8 is useless for the normal oper-
ation of the boiler.
It must be used only by a qualified person during
commissioning and servicing.
1.3 Isolation valves
11
10
13
12
Fig. 1.2 (bottom view of the boiler)
10 C.h. return valve
11 Gas inlet valve
12 Condensate drain pipe
13 C.h. flow valve
1.4 Technical data
For detailed technical data see section 4.5 of this
manual.
78 6 54 9
Fig. 1.3
USE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Appliance description
3
1.5 Operation lights
Three lights (9 in Fig. 1.3) give detailed indication
regarding the operation of the boiler.
The following table gives the relationship between
each of the possible light combinations and their
meaning during the normal operation of the boiler.
A short pulse every 4
seconds:
stand --- by condition
Function selector in
position.
Anti--- freeze system active
1 second pulse every 2
seconds: normally
operating boiler. Function
selector in position
C.h. operation
Frost protect operation
Faulty c.h. temperature
probe NTC
Faulty primary circuit
(no water or absence of
flow)
Lack of burner ignition
Safety thermostat lock out
Faulty fan control system
Flue temperature probe
NTC lock out
Open flue temperature
probe NTC
Faulty external temp.
probe (if fitted)
Flame detection error
Other faults
Lack of power supply or
faulty electronic control
p.c.b.
Meaning of symbols
L
amp OFF
L
amp ON
Flashing lamp, alone or simultaneously
with an other lamp.
Flashing lamp, alternate with another
lamp.
If the lights combination observed is not included
in the above table a fault may be indicated.
Reference should be made to the following table.
In this case switch off the boiler, as described in
section 2.5 on page 6 and call a competent and re-
sponsible Service Engineer.
USE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

4
2 Instructions for use
2.1 Warnings
Biasi UK Ltd support the Benchmark initiat-
ive. The Benchmark Log Book is located at
the back of this manual and should be com-
pleted by the Installing/Commissioning En-
gineer and handed over to the User for fu-
ture reference by other visiting Engineers.
Also included is the Service Interval Record
card that should be completed by the Ser-
vice Engineer following the annual service
maintenance of the boiler and system.
All CORGI Registered Installers carry a
CORGI ID card, and have a registration
number. Both should be recorded in your
Benchmark Log Book. You can check your
Installer is registered by calling CORGI di-
rect on 01256 372400.
In order to guarantee safety and correct oper-
ation, it is essential that all the tests are carried
out by a competent and responsible service
engineer before lighting up the boiler.
The tests are described in the installation in-
structions in section 7 commissioning.
Ensure that the c.h. circuit is regularly filled
with water (even if the boiler is only used for
d.h.w. supply) checking that the pressure indi-
cated on the temperature and pressure gauge
4 is not lower than that shown in Fig. 2.2.
If the pressure reading on the pressure gauge
is below that shown in Fig. 2.2, then the system
will require topping up. A filling loop is normally
provided by the Installer for this purpose.
If you are in any doubt regarding this pro-
cedure you are advised to contact your In-
staller or an Approved Engineer.
This appliance is provided with a built in anti---
freeze system that operates the boiler when
the temperature is below 5 ˚C
Therefore, when the boiler is not lit or used in
cold weather, with consequent risk of freezing
do not switch off the boiler at the fused spur
isolation switch or close the gas inlet cock.
When you do not expect to use the boiler for a
long period and the boiler is not to be used for
frost protection then follow the instructions
giveninsection2.5onpage6.
2.2 Refilling procedure
1 Isolate the boiler from the electrical supply at
the fused spur. Reconnect the filling loop as
demonstrated in Fig. 2.1.
Te m p o r a r y
connection
Control valve
Control valve
Double check valve
Supply pipe
(cold water inlet)
C.h. return pipe
Fig. 2.1
2 Open the valves of the filling loop and watch
the gauge until it reaches normal filling pres-
sure as shown in Fig. 2.2.
4
Normal filling
pressure
Fig. 2.2
3 Close the valves and remove the filling loop.
If you experience any difficulty with the oper-
ation of the boiler, switch off the boiler immedi-
ately at the fused spur isolation switch and
contactyourInstalleroranapprovedService
Engineer
Air introduced into the boiler during this filling pro-
cess will vent through the automatic air purger
fitted to the boiler. You may also find it necessary
to vent air from your radiator circuit using your
radiator key, however be aware that excessive
venting will cause the pressure in the system to
drop.
Always ensure that the pressure gauge is set at the
required pressure.
2.3 Ignition
1 Check that the valves located in the lower part
of the boiler are open (Fig. 2.3).
USE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
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Instructions for use
5
Open position
Fig. 2.3
2 Turn on the electricity supply to the boiler,
switching on the fused spur isolation switch.
The appliance operation light 9 (Fig. 2.4) will
flash every 4 seconds (stand---by condition).
3 To operate the boiler, position the function se-
lector 7 as in Fig. 2.4.
The appliance operation light 9 will flash every
2 seconds (operating boiler).
79
Fig. 2.4
2.4 C.h. circuit temperature
The output temperature of c.h. water is adjustable
from a minimum of about 25qC to a maximum of
about 85qC (Fig. 2.5), by turning the knob (7).
Adjustment of the boiler temperature alters the
gas flow at the burner according to the thermal de-
mand in the system. So it is usual to see the burner
lit at the minimum level for more or less long
periods.
The following instructions indicate how to set the
output temperature of the c.h. water depending
on the outside temperature.
Minimum
Maximum
Fig. 2.5
Adjustment of temperature WITHOUT the ex-
ternal temperature probe (optional) fitted
In order to achieve optimal settings for economy
and comfort, we recommend adjusting the oper-
ating temperature of the c.h. water according to
the outside temperature, positioning the knob as
follows:
Lower than
--- 5 ˚C
From 5 to 15 ˚C
Between
--- 5 a n d + 5 ˚C
Fig. 2.6
Your qualified Installer will be able to recommend
the most suitable adjustment for your system.
The temperature and pressure gauge (4, Fig. 1.3
on page 2) will allow you to check that the set tem-
perature is obtained.
Adjustment of temperature WITH the external
temperature
probe (optional)
USE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Instructions for use
6
When the boiler is connected to the external tem-
perature probe (optional), the temperature of the
c.h. flow is automatically adjusted with reference
to the external temperature.
In this case the boiler must be properly set by the
Installer ( section 7.8 of this manual) and the c.h.
flow temperature control knob 7 must be positio-
ned as illustrated in Fig. 2.7
7+15
--- 1 5
Fig. 2.7
To satisfy temporary changes or different room
temperatures, the c.h. water temperature can also
be manually increased or decreased within a ran-
ge of ±15 ˚C by turning the knob 7 (Fig. 2.7). Mo-
re details are given in section 7.8 of this manual.
2.5 Extinguishing
To turn the boiler off set the function selector 7 to
the position shown in Fig. 2.8.
The appliance operation light 9 will flash every 4
seconds.
79
Fig. 2.8
When you do not expect to use the boiler for a long
period:
1 Switch off the electricity supply to the boiler, by
means of the fused spur isolation switch;
2 Shut off the gas supply cock 11 and the valves
for the water circuits fitted under the boiler
(Fig. 2.9).
3 Empty the water circuits, if necessary, as
shownintheinstallation instructions in the sec-
tion maintenance.
Closed position
11
Fig. 2.9
USE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

7
3Usefuladvice
3.1 Central heating
For reasonably economical service install a room
thermostat.
Never shut off the radiator in the area where the
room thermostat is installed.
If a radiator (or a convector) does not heat up,
check that no air is present in it and that its valve
is open.
If the ambient temperature is too high, do not alter
the radiator valves. Reduce the central heating
temperature instead by means of the room ther-
mostat and the function selector (7 in Fig. 3.1).
7
Fig. 3.1
3.2 Frost protection
This appliance is provided with a built in anti---
freeze system that operates the boiler when the
temperature is below 5 ˚C
Therefore, when the boiler is not lit and used in
cold weather, with consequent risk of freezing do
not switch off the boiler at the fused spur isola-
tion switch or close the gas inlet cock.
3.3 Condensate drain
Thecondensatedrainmustnotbemodifiedor
blocked.
Blockage of the condensate drain, caused by de-
bris or freezing, can cause automatic shutdown of
the boiler.
If freezing is suspected and the pipe run is access-
ible an attempt may be made to free the obstruc-
tion by pouring hot water over the exposed pipe
an cleaning any blockage from the end of the
pipe. If this fails to remedy the problem the assist-
ance of a CORGI registered installer or in IE a com-
petent person should be sought.
3.4 Periodic maintenance
For efficient and continuous operation of the
boiler, it is advisable to arrange maintenance and
cleaning by an Authorised Service Centre En-
gineer, at least once a year.
During the service, the most important compo-
nents of the boiler will be inspected and cleaned.
This service can be part of a maintenance con-
tract.
In particular, you are advised to have the following
checks carried out:
--- condensing heat exchanger
--- burner;
--- exhaust fume duct and flue;
--- pressurisation of the expansion tank;
--- filling up of the central heating circuit;
--- bleeding of air from the central heating system;
--- general check of the appliance’s operation.
3.5 External cleaning
Before carrying out any cleaning, disconnect the
appliance from the electrical mains, using the
fused spur isolation switch fitted adjacent to the
appliance.
To clean the external panels, use a cloth soaked in
soapy water. Do not use solvents, abrasive powd-
ers or sponges.
Do not carry out cleaning of the appliance and/or
its parts with readily flammable substances (for
example petrol, alcohols, naphtha, etc.).
3.6 Operational faults
If the lock---out signal lamp (5 in Fig. 3.2) comes
on
this indicates that the safety lock--- out has stopped
the boiler.
6
5
Fig. 3.2
USE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Useful advice
8
To re---start the boiler, it is necessary to press the
boiler reset button 6 (Fig. 3.2).
For the first lighting up and following maintenance
procedures for the gas supply, it may be necess-
ary to repeat the resetting operation several times
so as to remove the air present in the pipework.
After five consecutive resetting attempts the reset
button is inhibited. To restore its function it is
necessary to switch the boiler off and on from the
electrical mains, using the fused spur isolation
switch fitted adjacent to the appliance.
Safety lock--- out may occur even in case of a
blockage of the condensate drainage (e.g.
plugged drain pipe).
It is advisable to check the condensate drainage
pipe and traps for cleanness.
In this case and in case of persistent lock--- out call
a competent and responsible Service Engineer.
If noises due to air bubbles are heard during
operation...
you should check that the pressure on the tem-
perature and pressure gauge (Fig. 2.2 on page 4)
is not below the correct setting.
If required, top up the system correctly, as de-
scribed in the section 2.2 of this manual.
Bleed any air present in the radiators, if necessary.
If the pressure on the temperature and pres-
suregauge(4onpage2)hasgonedown...
it is necessary to top up the appliance with water
again, so as to raise the pressure to an adequate
level as described in the section 2.2 of this manual.
If topping up with water has to be done very fre-
quently, have the system checked for leaks.
If water comes out of the pressure relief valve
Check on the temperature and pressure gauge (4
on page 2) that the pressure in the central heating
circuit is not close to 3 bars. In this case, tempera-
ture rise in the circuit can cause the pressure relief
valve to open.
So that this does not happen and to decrease the
pressure to a normal value, it is advisable to vent
some of the water in the appliance through the
bleed valves present in the radiators.
If water should occasionally leak from the
boiler...
shut off the valves positioned under the boiler
(Fig. 2.9 on page 6) and call an Authorised Service
Centre Engineer.
In this case or in case of problems other than
those mentioned here, switch off the boiler, as
described in section 2.5 on page 6 and call a
competent and responsible Service Engineer.
USE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

9
4 Technical information
4.1 Overview
23
16
31
32
27
18
22
29
24
19
14
25
26
28
33
17
30
21
20
34
15
Fig. 4.1
10 C.h. return valve
11 Gas inlet valves
12 Condensate drain pipe
13 C.h. flow valve
14 Condensing heat exchanger air purger valve
15 C.h. temperature probe NTC
16 Condensing heat exchanger
17 Safety thermostat
18 Flame--- detecting electrode
19 Transformer
20 Air manifold
21 C.h. pressure relief valve
22 Automatic air purger valve
23 Main circuit drain valve
24 Pump
25 Pump vent plug
26 Gas valve
27 Primary circuit flow switch
28 Condensate trap
29 Fan
30 Spark generator
31 Ignition electrodes
32 Burner
33 Flue temperature probe NTC
34 Safety thermal fuse
35 Gas valve inlet pressure test point
36 Gas valve outlet pressure test point
37 C.h. expansion tank
3 8 B y --- p a s s v a l v e
39 Flue outlet pipe
40 Air intake pipe
41 Flue exhaust sampling point
42 Air sampling point
INSTALLATION
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Technical information
10
4.2 Main diagram
40
39
27
16
31
24
21
26
35
22
38
10 1311
37
29
18
15
17
32
23
28
12
33
41
42
14
36
34
Fig. 4.2
INSTALLATION
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Technical information
11
4.3 Hydraulic specifications
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0 200 400 600 800 1000 1200 1400
0
10
20
30
40
kPa bar
l/h
60
50
Fig. 4.3 model M110B.24SR/...
The hydraulic specifications in Fig. 4.3 represent
the pressure (available head for the central heat-
ing system) as a function of the flow rate.
The load loss due to the boiler has already been
subtracted.
Operation of integral By---pass valve
The boiler is fitted with an automatic by --- pass
valve (38 on page 9), which protects the primary
heat exchanger.
The integral automatic by --- pass will ensure a mini-
mum flow through the primary heat exchanger of
the boiler in the event that the flow around the cen-
tral heating circuit is restricted due to closure of
thermostatic or system control valves.
4.4 Expansion vessel
Note:thisboilerisdesignedforoperationonly
in a sealed central heating system
The height difference between the pressure relief
valve and the highest point in the system may be
10m at most.
For greater differences, increase the pre---load
pressure in the expansion vessel (37 on page 9)
and the system, when cold, by 0.1 bar for each
additional 1m.
Capacity l7,0
P r e --- l o a d p r e s s u r e kPa
bar
100
1,0
Maximum volume of water
in the system * l109
Ta b . 4 . 1
* Where conditions are:
--- Average maximum temperature of the system
is 85qC
--- Initial temperature when filling up the system is
10qC
For systems with volumes greater than 109 l, an
additional expansion vessel must be provided.
INSTALLATION
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Technical information
12
4.5 Technical data
mod. M110B.24SR/...
Heat input
Nominal net (A) kW
BTU/h
25,7
87 685
gross (B) kW
BTU/h
28,5
97 238
Minimum net (A) kW
BTU/h
6,0
20 471
gross (B) kW
BTU/h
6,7
22 859
Useful output
Maximum kW
BTU/h
25,1
85 638
Minimum kW
BTU/h
5,8
19 789
Maximum condensing kW
BTU/h
27,3
93 144
Minimum condensing kW
BTU/h
6,3
21 495
Central heating
Maximum flow temp. ˚C85
Minimum flow temp. ˚C25
Maximum pressure kPa
bar
250
2,5
Minimum pressure kPa
bar
30
0,3
Available head
(in 1000 l/h)
kPa
bar
23
0,23
Seasonal efficiency (C) band
%
A
90,2
Gas supply pressures
Gas Natural
G20
Propane
G31
Norm. Pa
mbar
2 000 3 700
37
Max Pa
mbar
2 500
25
4 500
45
Min. Pa
mbar
1 700
17
2 500
25
1 mbar approximately equals 10 mm H2O
Gas rate
Gas Max. Min.
Natural (G20) m3/h 2,72 0,63
Propane (G31) kg/h 2,00 0,47
Restrictors references
Gas (ø mm) Air (color)
Natural (G20) 5,65 Fuchsia
Propane (G31) 4,30 Fuchsia
Electrical Data
Voltage V~ 230
Frequency Hz 50
Power consumption W108
Protection degree IPX4D
External fuse rating A 3
Internal fuse rating A N˚2 --- 3,15 AF
N˚1 --- 0 , 4 T
(A) referred to the net calorific value at 15 ˚C and 1013,25 mbar:
G20 = 34,02 MJ/m3--- G31 = 46,34 MJ/kg
(B) referred to the gross calorific value at 15 ˚C and 1013,25 mbar:
G20 = 37,78 MJ/m3--- G31 = 50,37 MJ/kg
(C)The value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating
of dwellings. The test data from which it has been calculated have been certified by a notified body.
(D) Values subject to tolerance
INSTALLATION
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Technical information
13
Flue design
Flue pipe diameter
Coaxial mm 60/100
Twin split pipes mm 80
Roof mm 80/125
Nominal heat flow rate
(A)(E) kW 25,7
Exhaust temperature (E) ˚C85
Smoke production (E) kg/h 40
CO2contents
CO2content with gas G20
(range min --- max)
%9,0--- 9,8
CO2content with gas G31
(range min --- max)
%10,0--- 11,0
At nominal heat input of 25,7 kW (A)(E)
CO2content with gas G20
(range min --- max)
%9,0--- 9,8
CO2content with gas G31
(range min --- max)
%10,0--- 11,0
At minimum heat input of 6,0 kW (A)(E)
Other flue gas figures
At nominal heat input --- non condensing
O2content %4,3---4,3
CO content ppm 200
Exhaust temperature ˚C85
Other specifications
Height mm 803
Width mm 400
Depth mm 350
Weight (dry) kg 44,0
Water volume in the boiler
(up to 1 bar)
l(kg) 2
(E) Values refer to tests with a 1 m flue working at the nominal heat input
INSTALLATION
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

rev. 17.09.93
14
5 General requirements
Biasi UK Ltd support the Benchmark initiative.
The Benchmark Log Book is located at the back
of this manual and should be completed by the
Installing/Commissioning Engineer and
handed over to the User for future reference by
other visiting Engineers. Also included is the
Service Interval Record card that should be
completed by the Service Engineer following
the annual service maintenance of the boiler
and system.
For Ireland (IE), it is necessary to complete a
“Declaration of Conformity” to indicate com-
pliance to I.S.813.2002.
This appliance must be installed by a compet-
ent person in accordance with the Gas Safety
(installation & Use) Regulations.
5.1 Related documents
The installation of this appliance must be in ac-
cordance with the relevant requirements of the
current Gas Safety (Installation & Use) Regula-
tions, the Local Building Regulations, the current
I.E.E. Wiring Regulations, the Regulations and
by--- laws of the local water undertaking, and in
Scotland, in accordance with the Building Stan-
dards (Scotland) Regulation. Health and safety
document n˚635 ”Electricity at work regs.”.
It should also be in accordance with the British
Standard Codes of Practice:
In Ireland (IE). The installation must be carried out
by a Competent Person and installed in accord-
ance with the current edition of I.S.813.2002 “Do-
mestic Gas Installations” the current Building
Regulations and reference should be made to the
current ETCI rules for electrical installations.
5.2 Location of appliance
The appliance may be installed in any room or in-
ternal space, although particular attention is
drawn to the requirements of the current I.E.E. Wir-
ing Regulations, and in Scotland, the electrical
provisions of the Building Regulations applicable
in Scotland, with respect to the installation of the
combined appliance in a room containing a bath
or shower.
For Ireland (IE), reference should be made to the
current edition of I.S.813.2002 and the current
ETCI rules for electrical installations.
Where a room---sealed appliance is installed in
a room containing a bath or shower, any electri-
cal switch or appliance control, utilising mains
electricity should be so situated that it cannot
be touched by a person using the bath or
shower.
The location must permit the provision of an ad-
equate flue and termination.
For unusual locations special procedures may be
necessary and BS 6798 gives detailed guidance
on this aspect.
A compartment used to enclose the appliance
must be designed specifically for this purpose.
This appliance is not suitable for external installa-
tion.
5.3 Flue system
The provision for satisfactory flue termination must
be made as described in BS 5440 part 1.
For Ireland (IE), refer to I.S.813.2002.
The appliance must be installed so that the flue ter-
minal is exposed to external air.
It must not be installed so that the terminal dis-
charges into an other room or space as an out-
house or lean--- to. It is important that the position
of the terminal allows a free passage of air across
at all times.
The terminalshould be located with due regard for
the damage or discoloration that might occur to
building products in the vicinity.
In cold and/or humid weather water vapour may
condense on leaving the flue terminal; the effect of
such pluming must be considered.
Pluming may easily occur at the terminal. Where
possible, terminal position which could cause a
nuisance should be avoided.
INSTALLATION
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

General requirements
rev. 17.09.93
15
The minimum acceptable spacing from the ter-
minal to obstructions and ventilation openings are
specified in Fig. 5.1.
A
BC
E
F
G
I
JK L
MN
H
I
O
P
Q
D
Fig. 5.1
Flue terminal position mm
A Directly below a window or other opening 300. ...
B Below gutters, soil pipes or drain pipes 75. .....
C Below eaves 200. ............................
D Below balconies* 600. ........................
E Below car port roof NO. .......................
F From vertical drain pipes and soil pipes 150. ....
G From internal corners** 450. ..................
H From external corners 300. ...................
I Above ground or balcony level 300.. ............
J From a surface facing a terminal 600. ...........
K From a terminal facing a terminal 1 200. .........
L From an opening in the car port.
(e.g.door,window)intodwelling NO...........
M Vertically from a terminal in the same wall 1 500.
N Horizontally from a terminal in the same wall 300..
O Above the roof pitch with roof slope less.
than or equal to 30˚350......................
Above the roof pitch with roof slope
more than 30˚600...........................
P From wall face 600. ..........................
Q From,aboveortosideofanopening 300. .......
*Wherever practicable to do so, the flue should be ex-
tended beyond the perimeter of the balcony
** Consideration should be given to adding protection
against condensate to the adjacent structure
5.4 Gas supply
The Gas meter is connected to the service pipe by
the local gas region or a local gas region contrac-
tor.
If the gas supply for the boiler serves other
appliances ensure that an adequate supply is
available both to the boiler and the other
appliance when they are in use at the same time.
Pipework must be of adequate size. Pipes of a
smaller size than the boiler inlet connection should
not be used.
Installation pipes should be fitted in accordance
with BS 6891 and the complete installation should
be tested for soundness.
For Ireland (IE), refer to I.S.813.2002.
5.5 Air supply
The room in which the boiler is installed does not
require a purpose provided air vent.
5.6 Ventilation
If installed in a cupboard or compartment, it is not
necessary to provide additional ventilation for
cooling for this particular product. However con-
sideration must be given to clearance require-
ments for maintenance (see section 6.2) and
under no circumstances must stored articles be al-
lowed to come into contact with the boiler or flue
pipe.
5.7 Condensate drain
Ensure that the condensate discharge complies
with the national or local regulations in force.
Thecondensatepipemustbefittedinaccordance
with Building Regulations.
Drainpipe material should be resistant to acid as
the condensate is slightly acid with a pH less than
6.5.
The boiler includes a trap (28 on page 9) that pre-
vents the combustion products entering the drain,
however an additional trap with a seal of at least 75
mm and an air break between the traps is required
(Fig. 5.2 --- Fig. 5.3).
The length of the condensate pipe should be kept
at minimum.
To avoid condensate being trapped:
--- the drainpipe should be run with a fall of at least
2.5˚(45 mm/m) away from the boiler;
--- the number of bends and joints should be kept
at minimum;
--- the drainpipe should be adequately fixed to
prevent pipe sagging.
If a part of the drainpipe runs externally this part
should be kept as short as possible and protected
to reduce the risk of freezing.
INSTALLATION
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

General requirements
rev. 17.09.93
16
Connection of condensate drainage pipe to in-
ternal soil and vent stack.
Condensate drain
450
75
A
B
C
D
F
E
Dimensions in mm
Fig. 5.2
ABoiler
B Visible air break
C75mmtrap
D Internal soil and vent stack
EInvert
F 450 mm up to three storeys
Connection of condensate drainage pipe
downstream of a sink waste trap
75
A
B
C
G
I
H
Dimensions in mm
Condensate
drain
t100
Fig. 5.3
ABoiler
B Visible air break
C75mmtrap
GSink
H Open end of condensate drainage pipe direct
into gully below grating but above water level
I Sink lip
5.8 Water circulation (c.h.)
Detailed recommendations are given in BS 6798
and BS 5449; the following notes are given for
general guidance.
For Ireland (IE), refer to I.S.813.2002.
Pipework
The return temperature must not be lower of
30 ˚C.
Copper tubing to BS EN 1057 is recommended for
water pipes. Jointing should be either with capil-
lary 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.
The appliance has a built--- in automatic air release
valve, it should be ensured as far as possible that
the appliance heat exchanger is not a natural col-
lecting 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 pas-
sing through ventilated spaces in roofs and under
floors.
B y --- p a s s
The appliance includes an automatic by--- pass
valve which protects the main heat exchanger in
case of reduced or interrupted water circulation
through the heating system due to the closing of
thermostatic valves or cock --- type valves within the
system.
The by --- pass is calibrated to assure a minimum
flow of 200--- 300 lts/hr through the main heat ex-
changer.
If you are installing a system that includes thermo-
static radiator valves (TRV) and/or small bore
(8 --- 10 mm) it may be necessary to fit an external
by --- pass to facilitate correct operation of the
boiler.
The fitting of an external bypass helps to prevent
and limit system noise.
Air release points
Thesemustbefittedatallhighpointswhereairwill
natural collect and must be sited to facilitate com-
pletefillingofthesystem.
INSTALLATION
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com