Biasi RIVA COMPACT HE M96.24SM/C2 User manual

Wall hung, fan flue, room sealed, high efficiency gas boiler
User manual and
Installation instructions
RIVA COMPACT HE
Models
M96.24SM/C2
M96.28SM/C2
M96.32SM/C2

Congratulations on your choice.
RIVA COMPACT HE are condensing high efficiency sealed chamber fan flue gas boilers.
They are fully electronically controlled and have electronic ignition.
Thematerialstheyaremadeofandthecontrolsystemstheyareequippedwithgiveyousafety,
a high level of comfort and energy savings to allow you to get the greatest benefit out of
independent heating.
RIVA COMPACT 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;
--- isofthecorrectgaugefortheflowtothe
boiler;
--- is fitted with all the safety and control de-
vices required by the current Regulations.
nEnsure that
--- the installer has connected the pressure
relief valve outlet to a drain pipe. The manu-
facturers are not responsible for damage
caused by opening of the pressure relief
valve and consequent escape of water, if not
connected correctly to the drain.
--- 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
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
thattheboilerproducesawhiteplumeof
condensationvapourfromtheflueterminal.
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.
First aid medical attention must be sought follow-
ing eyes/skin contact, wash with clean water.
Appliance category II2H3+ Gas G20 20 mbar, G30 29 mbar, G31 37 mbar
Country of destination: United Kingdom (GB) Ireland (IE)
This appliance conforms with the EEC directive 90/396 and, consequently, it has the right to make use
of the brand name
Moreover, the appliance conformswith the EEC directive 87/308 relative to the prevention and elimina-
tion of radio disturbances.
The appliance is built to comply with the regulation now in force regarding gas appliance’s safety and
the European regulation now in force relative to safety of household and similar electrical appliances.
The manufacturer, in the continuous pocess 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.

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
theflueconnection.
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.
nDo not remove the cap of the pressure
test points of the air switch (top left side of the
boiler).
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.
nDonotforgettorangeratetheboilerto
suit the system requirements. This pro-
cedure is covered in the commissioning sec-
tion of the installation manual.
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]

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 5........................
2.4 C.h. circuit temperature 5..........
2.5 D.h.w. temperature 6..............
2.6 Extinguishing 7..................
2.7 Built in time switch 7..............
3Usefuladvice 10.................
3.1 Central heating 10.................
3.2 Frost protection 10................
3.3 Condensate drain 10..............
3.4 Periodic maintenance 10...........
3.5 External cleaning 10...............
3.6 Operational faults 10...............
4 Technical information 12..........
4.1 Overview 12......................
4.2 Main diagram 13..................
4.3 Hydraulic specifications 14.........
4.4 Expansion vessel 14...............
4.5 Technical data mod. M96.24SM/... 15.
4.6 Technical data mod. M96.28SM/... 17.
4.7 Technical data mod. M96.32SM/... 19.
5 General requirements 21..........
5.1 Related documents 21.............
5.2 Location of appliance 21...........
5.3 Flue system 21....................
5.4 Gas supply 22....................
5.5 Air supply 22.....................
5.6 Ventilation 22.....................
5.7 Condensate drain 22..............
5.8 Water circulation (c.h.) 23...........
5.9 Domestic water 24.................
5.10 Water treatment 24................
5.11 Electrical supply 24................
6Installation 25....................
6.1 Warnings 25......................
6.2 Precautions for installation 25.......
6.3 Installing the bracket 25............
6.4 Overall dimensions 26.............
6.5 Joints 26.........................
6.6 Mounting the boiler 26.............
6.7 Fitting the flue system 27...........
6.8 Choice of flue 27..................
6.9 Electrical connections 28...........
6.10 External frost protection 30.........
7Commissioning 32...............
7.1 Electrical installation 32............
7.2 Gas supply installation 32..........
7.3 Filling the d.h.w. system 32.........
7.4 Initial filling of the system 32........
7.5 Condensate pipe and traps 33......
7.6 Lighting the boiler 33..............
7.7 Checking gas pressure at the burner 33
7.8 Checking the burner ignition 34.....
7.9 Adjustment of useful c.h. output 35..
7.10 Checking the ignition device 37.....
7.11Checkingthefluesystem 37........
7.12 Checking condensate drain pipe 37..
7.13 Instructing the user 37.............
8Gasconversion 38...............
8.1 Warnings 38......................
8.2 Procedures 38....................
9 Maintenance 40..................
9.1 Warnings 40......................
9.2 Dismantling the external panels 40...
9.3 Emptying the d.h.w. system 40......
9.4 Emptying the c.h. system 40........
9.5 Combustion analysis check 41......
9.6 Cleaning primary heat exchanger 41.
9.7 Checking the pressurisation
in the expansion vessel 41..........
9.8 Cleaning the burner 41.............
9.9 Checking the flue 41...............
9.10 Drain pipe inspection 41............
9.11 Visual inspection of appliance 41....
9.12 Gas pressures and soundness 41...
Abbreviations used in the manual:
C.h. = Central heating
D.h.w. = Domestic hot water
D.c.w. = Domestic cold water
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INSTALLATIONMAINTENANCE

1APPLIANCE DESCRIPTION
2
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 Time switch (c.h. control)
6 Lock--- out signal lamp
7 Lockout reset button
8 Function selector and c.h. temp. control knob
9 D.h.w. temperature control knob
10 Appliance operation lights
1.3 Isolation valves
14
12
16
13
15
11
Fig. 1.2 (bottom view of the boiler)
11 Condensate drain pipe
12 C.h. return valve
13 D.c.w. inlet valve
14 Gas inlet valve
15 D.h.w. outlet pipe
16 C.h. flow valve
1.4 Technical data
For detailed technical data see section 4.5 or 4.6
of this manual.
89 76 45
10
Fig. 1.3
USE

Appliance description
3
1.5 Operation lights
Three lights (10 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.
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 or
position
C.h. operation
D.h.w. operation
Frost protect operation
D.h.w. operation
Excessive temperature on
primary circuit
Faulty c.h. temperature
probe NTC
Faulty d.h.w temperature
probe NTC
Faulty flue temperature
probe NTC
Faulty primary circuit
(no water or absence of
flow)
Faulty air pressure switch
Lack of burner ignition (no
ignition signal from the full
seqence ignition device)
Safety thermostat lock out
Flue temperature probe
NTC lock out
Lack of power supply or
fauly electr. control p.c.b.
Lamp OFF
Lamp ON
Flashing lamp, alone or simultaneously
with an other lamp.
Flashing lamp, alternate with another
lamp.
USE

2INSTRUCTIONS FOR USE
4
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/Commisssioning
Engineer 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 372300.
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 indicated
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 ûC
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
giveninsection2.6onpage7.
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 ra 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
contact your Installer or an approved Service
Engineer
Air introduced into the boiler during this filling pro-
cess will vent through the automatic air purger
fittedtotheboiler.Youmayalsofinditnecessary
toventairfromyourradiatorcircuitusingyour
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.
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Instructions for use
5
2.3 Ignition
1 Check that the valves located in the lower part
of the boiler are open (Fig. 2.3).
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 10 (Fig. 2.4) will
flash every 4 seconds (stand--- by condition).
3 If the boiler is to be used for c.h. and d.h.w,
position the function selector 8 as in Fig. 2.4.
The appliance operation light 10 will flash
every 2 seconds (operating boiler).
810
Fig. 2.4
4 If d.h.w. supply only is required, position the
function selector 8 as in Fig. 2.5.
The appliance operation light 10 will flash
every 2 seconds (operating boiler).
810
Fig. 2.5
2.4 C.h. circuit temperature
The output temperature of c.h. water is adjustable
from a minimum of about 38°C to a maximum of
about 85°C (Fig. 2.6), by turning the function se-
lector (8).
Adjustment of c.h. output on the boiler is auto-
matic. The greatest output pre--- set in the factory
can, however, be reduced in level according to
actual system requirements; this does not affect
the maximum output in d.h.w. operation.
Such adjustments must be carried out by a quali-
fied person; therefore we advise you to contact
yourinstallerorServiceAgent.
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
litattheminimumlevelformoreorlesslong
periods.
USE

Instructions for use
6
Minimum
Maximum
Fig. 2.6
Adjustment
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 ûC
From5to15ûC
Between
--- 5 a n d + 5 ûC
Fig. 2.7
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.
2.5 D.h.w. temperature
The temperature of the d.h.w. leaving the boiler
can be varied from a minimum of about 35°Ctoa
maximum of about 55°C (Fig. 2.8), by turning the
temperature control knob 9.
9
Minimum
Maximum
Fig. 2.8
Adjustment of the d.h.w. temperature is complete-
ly separate from that of the c.h. circuit.
The adjustment system integrated within the
boiler automatically controls the flow of gas to the
burner in order to keep the temperature of d.h.w.
delivered constant, between the limits of maxi-
mum and minimum output.
Where the demand is at a low level or with the tem-
perature set to the minimum, it is normal to see a
cycle of lighting and extinguishing of the burner
when running.
Adjustment
It is advisable to adjust the d.h.w. temperature to
a level commensurate with the demand, minimis-
ing the need to mix with cold water. In this way, the
automatic control facilities will be fully exploited.
Moreover, where the amount of limescale present
in the water may be particularly great, not exceed-
ing the position in Fig. 2.9 of the d.h.w. tempera-
ture control knob 9 corresponding to about 50°C
(Fig. 2.9), minimises annoying incidences of scale
deposits and clogging.
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