QUINCY HYDRONIC TECHNOLOGY Riva ADVANCE COMBI Manual

USER MANUAL AND INSTRUCTIONS
Riva
ADVANCE COMBI
WALL HUNG GAS BOILER FOR
CENTRAL HEATING SUPPLY
Please Read Instructions Carefully
Save for Future Reference
— Do not store or use gasoline or other ammable vapors and liquids
in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone in your
building.
• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
• If you can not reach your gas supplier call the re department.
— Installation and service must be performed by a qualied installer,
service agency or the gas supplier.
WARNING: If the information in this manual is not followed
exactly, a re or explosion may result causing property
damage, personal injury or loss of life.
Quincy Hydronic Technology Inc.
3560 Lafayette Rd. Bldg. 2 Unit A
Portsmouth, NH 03801
Phone: [phone]
Fax: [phone]

2 RIVA ADVANCE COMBI USER MANUAL
Dear Customer:
Thank you for buying a Biasi Riva Advance Combi.
The Riva Advance Combi is a high efciency condensing, wall mounted gas boiler which
provides central heat.
We realize that it is not possible to answer all questions about the Riva Advance Combi in this
manual. Reading this installation manual does not make the reader an expert in all aspects
of installation and operation, and does not replace the need for a qualied, licensed heating
contractor. We urge you to contact your installing contractor or distributor if you are in question
about any aspect of your boiler’s performance. Our main concern is that you are satised with
your boiler and its performance. We require that your contractor complete efciency tests using
instruments.
The external controls and accessories listed in this manual (excluding those supplied inside the
boiler) are intended to serve as guidelines rather than specic recommendations. We realize
that other makes and models of such devices are available and can be used as successfully as
those we specify. The installing contractor is the best judge of a system’s specic requirements,
as well as the local availability of certain makes and models of controls and accessories. The
preceding does not apply, however, to the equipment that comes with every boiler, such as
the overheat control and pressure relief valves. The installation of the specic devices
supplied with every boiler is absolutely necessary to the safe operation of the boiler and
protection of the heating system.
All BIASI wall hung boilers are built in accordance with the ASME boiler and pressure vessel
code, and bear the “H” stamp. The Entire range of applications for the Riva Advance Combi
has been tested to standard ANSI Z21.13/CSA 4.9 and is CSA compliant.
This Riva Advance Combi has a 2 year warranty, a copy of which is provided with the boiler.
Please be sure to return the warranty registration card as the warranty will be void without your
boiler’s serial numbers (located on the ratings label afxed to the boiler), date of installation
and the name of your installer being on record in our les.
Thank you for purchasing our Riva Advance Combi. If you have questions or comments, please
don’t hesitate to contact us immediately. Our goal is 100% customer satisfaction.
QHT inc.

RIVA ADVANCE COMBI USER MANUAL 3
Table of Contents
Section Title Section Number Page Number
Warning - 4-5
Important Information - 6
General Information 1 7
Technical Information 2 7-8
Appliance Description 3 9
Overview 3.1 9
Control Panel 3.2 9
Piping Connections 3.3 9
LCD General Features 4 10-11
Instructions for Use 5 12-17
Warnings 5.1 12
Relling Procedure 5.2 12
Lighting/Operating Instructions 5.3 13
Temperature Unit Setting (°C or °F) 5.4 13
Central Heating Circuit Temperature 5.5 14-15
Extinguishing Instructions 5.6 16
Domestic Hot Water Temperature 5.7 16-17
Useful Advice 6 18-20
Central Heating 6.1 18
Frost Protection 6.2 18
Periodic Maintenance 6.3 18
External Cleaning 6.4 19
Operational Faults 6.5 19-20
Warranty 21

4 RIVA ADVANCE COMBI USER MANUAL
WARNING
DANGER
Boiler is certied as an indoor appliance. Do not install boiler outdoors or locate where it will
be exposed to freezing temperatures.
Caution: Do not store or use ammable materials, chemicals or ammable liquids,
especially gasoline, in the vicinity of this heating appliance.
Caution: Should overheating occur or the gas supply fail to shut off, do not turn off
or disconnect the electrical supply to the pump. Instead, shut off the gas supply at a
location external to the appliance.
Caution: Do not use this boiler if any part has been under water. Immediately call a
qualied service technician to inspect the boiler and to replace any part of the control
system and any gas control which has been under water.
— Do not store or use gasoline or other ammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you can not reach your gas supplier call the re department.
— Installation and service must be performed by a qualied installer, service
agency or the gas supplier.
WARNING: If the information in this manual is not followed
exactly, a re or explosion may result causing property
damage, personal injury or loss of life.

RIVA ADVANCE COMBI USER MANUAL 5
WARNING
Any appliance that burns natural gas, propane gas, fuel oil, wood or coal is capable of
producing carbon monoxide (CO). Carbon Monoxide (CO) is a gas which is odorless,
colorless and tasteless but is very toxic. CO is lighter than air and thus may travel throughout
the building.
BRIEF EXPOSURE TO HIGH CONCENTRATIONS OF CO, OR PROLONGED EXPOSURE
TO LESSER AMOUNTS OF CO MAY RESULT IN CARBON MONOXIDE POISONING.
EXPOSURE CAN BE FATAL AND EXPOSURE TO HIGH CONCENTRATIONS MAY
RESULT IN THE SUDDEN ONSET OF SYMPTOMS INCLUDING UNCONSCIOUSNESS.
Symptoms of CO poisoning include the following:
dizziness vision problems shortness of breath
headache loss of muscle control unclear thinking
nausea weakness unconsciousness
The symptoms of CO poisoning are often confused with those of inuenza, and the highest
incidence of poisoning occurs at the onset of cold weather or during u season.
A victim may not experience any symptoms, only one symptom, or a few symptoms.
Suspect the presence of carbon monoxide if symptoms tend to disappear when you
leave your home.
The following signs may indicate the presence of carbon monoxide:
• Hot gasses from appliance, venting system pipes or chimney, escaping into the living
space.
• Flames coming out around the appliance.
• Yellow colored ames in the appliance.
• Stale or smelly air.
• The presence of soot or carbon in or around the appliance.
• Very high unexplained humidity inside the building.
If any of the symptoms of CO occur, or if any of the signs of carbon monoxide are present,
VACATE THE PREMISES IMMEDIATELY AND CONTACT A QUALIFIED HEATING
SERVICE COMPANY OR THE GAS COMPANY OR THE FIRE DEPARTMENT.
ONLY QUALIFIED, LICENSED SERVICE CONTRACTORS SHOULD PERFORM WORK
ON YOUR BIASI RIVA ADVANCE COMBI.

6 RIVA ADVANCE COMBI USER MANUAL
IMPORTANT INFORMATION
Please read this page carefully.
• ALL BOILERS MUST BE INSTALLED IN ACCORDANCE WITH NATIONAL, STATE
AND LOCAL PLUMBING, HEATING AND ELECTRICAL CODES AND ORDINANCES,
AS WELL AS THE REGULATIONS OF THE SERVING ELECTRICAL, WATER AND
GAS UTILITIES.
• All systems should be designed by competent contractors, and only persons
knowledgeable in the layout and installation of heating systems should attempt
the installation of any boiler. It is the responsibility of the installing contractor
to see that all controls are correctly installed and operating properly when the
installation is completed.
• This boiler is intended for use, only with propane or natural gas. All ammable
liquids (especially gasoline), chemicals, rags, paper, wood scraps, debris, etc.,
should be kept away from the boiler at all times. Keep the boiler area clean and
free of all re hazards.
• Please read the literature and warranties supplied by the manufacturers of the
various accessory equipment. This equipment is warranted by the respective
manufacturers, not by Quincy Hydronic Technology, Inc. Each piece of
equipment must be installed and used according to the recommendations of the
manufacturer.
Codes and Regulations:
Installation of the boiler and related equipment must conform to national, state and
local regulating agencies and codes applicable to the installation of the equipment. In
the absence of local requirements, the following codes apply:
A. ANSI/NFPA - #70 National Electric Code
B. ANSI/NFPA - #211 Chimneys and Vents
C. ANSI/NFPA - #Z223.1 National Fuel Gas Code
C. ANSI/NFPA - Domestic Gas Conversion Burner
D. CAN/CGA - B149 Installation Codes
E. ANSI/ASME - CSD-1
The above codes are available from:
National Fire Protection Association (NFPA) CANADIAN STANDARDS ASSOCIATION
Battery March Park STANDARDS DIVISION
Quincy, Massachusetts, 02269 5060 Spectrum Way, Suite 100
http://www.nfpa.org Mississauga, Ontario, L4W 5N6

RIVA ADVANCE COMBI USER MANUAL 7
1. General Information
2. Technical Information (M210.32 CM)
The Riva Advance Combi is a high efciency condensing, wall mounted gas boiler which
provides central heat. The boiler features a gas valve which modulates the energy input from
32,000 BTU/h to 125,000 BTU/h. The boiler is shipped fully assembled. All units are pressure
and combustion tested at the factory prior to shipping.
Key Features:
• Wall mountable - saving valuable oor
space.
• Several ue options available
• Electronic spark ignition
• Safety ow switch - positioned on the
main circuit, which monitors the ow and
protects the main heat exchanger from
thermal shock should there be a lack of
water in the system.
• Frost protection - contains an integral frost
protection system to prevent frost damage
which can occur in areas susceptible to
very cold weather conditions.
• Boiler operation recognition system
- should the boiler not be used for
longer than 24 hours, it then performs
a controlled system test to ensuring the
motorized components within the boiler
do not become inoperable due to lack of
use.
• Gas valve modulation - the gas input
modulates based off central heating
temperature to within ± 2 ºF
• Diagnostic information system equipped
with three LED diagnostic lights for quick
error assessment.
GENERAL
Height in 31.6
Width in 15.7
Depth in 13.8
Weight lb 109.5
ELECTRICAL
Voltage V120
Frequency Hz 60
Current A 1.6
Power consumption W180
RESTRICTORS
REFERENCES
Gas
(ø mm)
Air
(color)
Natural N/A BLUE
Propane 548 BLUE
CENTRAL HEATING
Maximum working temp. °F 185
Temp. Regulation range* °F 100-185
Maximum pressure psi 30.0
Minimum pressure psi 4.35
Max head loss (at 4.4 GPM) ft 8.25
*At the minimum useful output

8 RIVA ADVANCE COMBI USER MANUAL
2. Technical Information Cont.
ENERGY CAPACITY
Nominal heat input
(0/2000 ft) MBH 125.0
Nominal heat input
(2000/4500 ft) MBH 112.5
Minimum heat input MBH 32.0
Maximum useful output
(0/2000 ft) MBH 112.5
Maximum useful output
(2000/4500 ft) MBH 107.0
Minimum useful output MBH 28.8
GAS PRESSURE AT BURNER
Gas Min Max Normal
Natural inwc 6.8 10.0 7.0
Propane inwc 10.0 13.0 11.0
FLUE DESIGN
Minimum Venturi pressure inwc 0.64
Flue pipe diameter
Coaxial in 2.25/4
3.25/5
Twin split pipes in 3.25/3.25
Nominal heat ow rate
(0/2000 ft) MBH 125.0
Nominal heat ow rate
(2000/4500 ft) MBH 112.5
Max Exhaust temperature °F 190
GAS FLOW RATE
Gas Min Max
Natural ft³/h 31.0 121.0
Propane lb/h 1.5 5.7
CLEARANCE TO COMBUSTIBLES
Front in 18
Back in 0
Top in 10
Sides in 2
Bottom in 8
Flue pipe enclosed in 2
Flue pipe free air in 0
Hot water pipes in 1”
FLUE GAS FIGURES
(at nominal heat input)
Gas Min Max
CO2 content with Natural gas 8.8% 9.8%
CO2 content with Propane gas 9.6% 11.0%
O2content 4.3% 5.0%
FLUE GAS FIGURES
(at minimum heat input)
Gas Min Max
CO2 content with Natural gas 8.8% 9.8%
CO2 content with Propane gas 9.6% 11.0%
O2content 4.3% 5.0%
DOMESTIC HOT WATER
Maximum temperature °F 131
Minimum temperature °F 95
Maximum pressure psi 145
Minimum pressure psi 4.35
D.h.w. ΔT 25°C / 45°F gpm 4.5
D.h.w. ΔT 30°C / 54°F gpm 3.8
D.h.w. ΔT 35°C / 63°F gpm 3.2
D.h.w. ΔT 40°C / 72°F gpm 2.8

RIVA ADVANCE COMBI USER MANUAL 9
3. Appliance Description
3.1 Overview:
1 Case front panel
2 Control panel
3 Control panel cover
3.2 Control Panel:
4 Pressure gauge
5 LCD
6 Boiler reset /setting button
7 Function switch and Central heating
temperature adjustment knob
8 Domestic hot water, temperature control
knob
45
6
7
8
bar
3
12
H
Figure 3.1
Figure 3.3
Figure 3.2
3.3 Piping Connections:
A Gas inlet pipe
B Main circuit drain cock
C C.h. supply copper pipe
D C.h. return copper pipe
E D.h.w. outlet copper pipe
F D.h.w. inlet copper pipe
G Condensate drain connection area
AEC F D
G
B

10 RIVA ADVANCE COMBI USER MANUAL
4. LCD General Features
The LCD (5 in Fig. 3.2) give detailed indication regarding the operation of the boiler.
Figure 4.1
LEGEND
The symbol indicates that the boiler
can be directly reactivated by the
user, by pressing the reset button
The symbol indicates that the fault
requires intervention on behalf of
specialised technical assistance
All symbols represented with lines
that surround them, indicate that the
symbol is ashing
SIGNAL DISPLAYED BY THE LCD
LCD FUNCTION
E01 + Lack of burner ignition on safety
lockout
E02 + Safety thermostat intervention
lockout
E03 +
General lockout
E10 +
Flue probe intervention lockout
E11 +
Flame detection error
E04 + Faulty primary circuit (no water or
absence of ow)
E05 +
Faulty fan control system
E06 +
Faulty c.h. temp. probe NTC
E07 +
Faulty d.h.w. temp. probe NTC
E08 +
Faulty external temp. probe NTC
E09 + Faulty ue temp. probe NTC
(interruption)
L01 Primary circuit temp. limit during
D.h.w. operation
The ashing symbol indicates
the communication between LCD
and the card
Boiler in winter mode
(C.h.+ D.h.w.)
Boiler in summer mode (D.h.w.)
Boiler in winter standby
Hot water + heating mode
(symbol ashing)
Boiler in summer standby
Hot water mode
(symbol ashing)
OFF Boiler powered and selector OFF
(symbol ashing)
bar
Remote connected
bar
External temperature control
probe connected

RIVA ADVANCE COMBI USER MANUAL 11
4. LCD General Features Cont.
Boiler on demand for C.h. power
(symbol ashing)
25.....85
Boiler requesting heating power
with external probe connected
(symbol ashing)
25.....85
bar
Heating temperature control with
delivery sensor
(upper probe)
Boiler on demand for D.h.w.
power (symbol ashing)
35.....60
Preheating enabled
Preheating enabled
(symbol ashing)
35.....60
5.....35
Boiler in anti-freeze phase
(symbol ashing + temperature
ashing)
Burner ignition
(spark)
Flame present
(Burner on)
bar
Pump operating
C
Variable temperature expressed
in °C
bar
Variable expressed in bar
(if the pressure sensor is installed)
Set D.h.w.
(visible for 10 sec)
(all other symbols are disabled)
(symbol ashing)
35.....60
Set C.h.
(visible for 10 sec)
(all other symbols are disabled)
(symbol ashing)
25.....85
Default parameter reset.
Reset is performed only by setting the
correct value and all symbols will turn on.
Boiler in chimney sweep functioning mode.
The chimney sweep is activated by setting
the correct parameter and is visualised by
the switching on of the hand and alternate
ashing between the temperature and the
communication and radiator symbol.

12 RIVA ADVANCE COMBI USER MANUAL
5. Instructions For Use
5.1 Warnings:
• In order to guaranty safety and correct operation, it is essential that all the tests are carried
out by a competent and responsible licensed service person before lighting up the boiler.
• The tests are described in the installation, operation and service instructions manual in
Section 15 Commissioning.
• Ensure that the Central Heating circuit is regularly lled with water checking that the pressure
indicated on the pressure gauge (4 on gure 3.2) is not lower than 1 bar (14.5 psi) as shown
on gure 5.1.
• If the pressure reading on the pressure gauge is below 1 bar (14.5 psi), then the system will
require lling. An automatic lling valve is normally provided by the installer for this purpose.
• If you are in any doubt regarding this procedure you are advised to contact your
Installer or an Approved Service Person.
• This appliance is provided with a built in anti-freeze system that operates the boiler when
the temperature is below 41 °F.
• 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 circuit breaker or close the gas inlet cock.
• When you expect not to use the boiler for a long period follow the instructions given in
section 5.6 on page 16.
5.2 Relling procedure:
• Isolate the boiler from the electrical supply
at the circuit breaker.
• The boiler should have been installed
with an automatic ll valve, external to the
unit. Open the cold water supply to the
automatic ll valve.
• The pressure should be 1 – 1,5 bar (14.5
– 22 psi).
• The automatic ll valve should maintain
this pressure, but not exceed it.
Figure 5.1
Air introduced into the boiler during this lling process will vent through the automatic air purger
tted to the boiler. You may also nd it necessary to vent air from your heating circuit using the
installed vents, 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.

RIVA ADVANCE COMBI USER MANUAL 13
5. Instructions For Use Cont.
5.3 Lighting/Operating Instructions:
Warnings: Do not attempt to start the boiler unless all cleanout doors are secured
and sealed. Do not attempt to light the burner by hand.
1 Check that the cocks connected to the
gas inlet pipe and to the supply cold water
inlet pipe (see section 3.3 for pipes) are
open.
2 Power the boiler electrically by setting the
power switch foreseen in the installation.
The LCD display shows the sequence
(gure 5.2).
3 If the appliance will not operate, follow
the extinguishing instructions on page 16
and call your service technician or gas
supplier.
Figure 5.2
5.4 Temperature unit setting (°C or °F):
The Function switch and Central heating temperature adjustment (7) knob must be in OFF
position.
Press the boiler reset/setting button (6) and simultaneously rotate the domestic hot water
temperature control (8) knob to:
• position 1 for °C unit (gure 5.3)
• position 7 for °F unit (gure 5.4)
By releasing the boiler reset/setting button (6), the display indicates the temperature in the
chosen unit.
Figure 5.3
6
7
8
Figure 5.4
6
7
8

14 RIVA ADVANCE COMBI USER MANUAL
5.5 Central Heating Circuit Temperature:
1 Turn the selector 7 as in Figure 5.5.
2 The output temperature of c.h. water is
adjustable from a minimum of about 100
°F to a maximum of about 185 °F (Figure
5.5), by turning the knob 7.
3 The LCD display shows the sequence in
Figure 5.6.
4 Adjustment of the boiler temperature
alters the gas ow at the burner according
to the thermal demand in the system.
So it is usual to see the burner lit at the
minimum level for more or less long
periods.
5 Adjustment of central heating. Output
on the boiler is automatic. The greatest
output is factory pre-set, however, it can
be reduced according to actual system
requirements. These adjustments must
be carried out by a qualied person;
therefore we advise you to contact your
installer or Service Agent.
Figure 5.5
8 7
Figure 5.6
5. Instructions For Use Cont.

RIVA ADVANCE COMBI USER MANUAL 15
5. Instructions For Use Cont.
Adjustment:
• In order to achieve optimal settings for
economy and comfort, we recommend
adjusting the operating temperature of
the central heating water according to the
outside temperature, positioning the knob
as in gure 5.7.
• Your installer may have installed additional
energy saving equipment and will be
able to recommend the most suitable
adjustment for your system.
• The LCD indicates if the set temperature
has been reached.
Request for heating power.
If the boiler requests heating power, you
can see the sequence on the LCD display
in Figure 5.8.
Figure 5.7
From 41 to 59°F Between 23 and 41°F
Lower than 23°F
Figure 5.8
Adjustment of temperature WITH the external temperature probe:
• When the boiler is connected to the external
temperature probe, the temperature of the
c.h. ow is automatically adjusted with
reference to the external temperature.
• In this case the boiler must be properly
set by the Installer and the c.h. ow
temperature control knob must be
positioned as illustrated in Figure 5.9 .
Figure 5.9
+15
-15

16 RIVA ADVANCE COMBI USER MANUAL
5.6 Extinguishing Instructions:
• To turn the boiler off set the function
selector 7 to the position shown in the
Figure 5.10.
• Signal given by the LCD display Figure
5.11.
• Turn off electric power to the appliance
at the circuit panel of boiler serviceman’s
switch.
5. Instructions For Use Cont.
Figure 5.10
87
Figure 5.11
When you expect not to use the boiler for a long period:
• Switch off the electricity supply to the boiler, by means of the circuit breaker;
• Shut off the gas supply cock connected to the gas inlet pipe and the cock connected to the
supply cold water inlet pipe (see section 3.3 for pipes);
• Empty the water circuit, if necessary, as shown in the installation, operation and service
instructions manual in the maintenance section.
5.7 Domestic hot water temperature:
Turn the selector 7 as shown in Figure 5.12.
Figure 5.12
87
The LCD display shows the sequence in
Figure 5.13.
Figure 5.13

RIVA ADVANCE COMBI USER MANUAL 17
5. Instructions For Use Cont.
The temperature of the domestic hot water coming out from the boiler can be regulated from a
minimum of approximately 95° F to a maximum of approximately 131° F by turning the control
shown in g. 5.14.
Figure 5.14
Minim
o
Massimo
Figure 5.15
Adjustment of the d.h.w. temperature is completely separate from that of the c.h. circuit.
The adjustment system integrated within the boiler automatically controls the ow of gas to
the burner in order to keep the temperature of d.h.w. delivered constant ,between the limits of
maximum and minimum output.
Where the demand is at a low level or with the temperature set to the minimum,it is normal to
see a cycle of lighting and extinguishing of the burner when running.
Regulate the domestic hot water temperature to a value suitable for your requirements.
Reduce the need to mix the hot water with cold water.
In this way, you will appreciate the characteristics of automatic regulation.
If the water is particularly hard, we recommend regulating the boiler at a temperature lower
than 120° F (Fig. 5.15).
In these cases, we nevertheless recommend the installation of a water-softener on the domestic
hot water system.
If the maximum ow rate of the domestic hot water is too high for a sufcient temperature to be
reached, it is advisable to have a suitable ow rate limiter installed by an Authorised Assistance
Technician.

18 RIVA ADVANCE COMBI USER MANUAL
6. Useful Advice
6.1 Central Heating:
• For easy operation of the boiler, a room
thermostat should be installed.
• 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 thermostat and the
knob (7 in Fig. 6.1).
Figure 6.1
7
6.2 Frost Protection:
• The built in antifreeze system protects the boiler from possible damages due to the freezing
temperatures.
• This system doesn’t guaranty the protection of the whole central heating system.
• In the case that the external temperature may be lower than 32 °F it is suggested to leave
the system running setting the room thermostat at a low temperature.
• When the boiler is completely switched off for a long period, it is recommended to empty
completely central heating circuit.
6.3 Periodic Maintenance:
• For efcient and continuous operation of the boiler, it is advisable to arrange maintenance
and cleaning by an Authorised Service Person, at least once a year.
• During the service, the most important components of the boiler will be inspected and
cleaned. This service can be part of a maintenance contract.
In particular, you are advised to have the following checks carried out:
• primary heat and domestic hot water exchanger;
• burner;
• exhaust fume duct and ue;
• pressurization of the expansion vessel;
• lling up of the central heating circuit;
• bleeding of air from the central heating system;
• general check of the appliance’s operation;
• check the condensate trap.

RIVA ADVANCE COMBI USER MANUAL 19
6. Useful Advice Cont.
6.4 External Cleaning:
• Before performing any cleaning, disconnect the appliance from the electrical mains, using
the dedicated circuit breaker or serviceman’s switch located adjacent to the appliance.
• To clean the external panels, use a cloth soaked in soapy water. Do not use solvents,
abrasive powders or sponges.
• Do not carry out cleaning of the appliance and/or its parts with readily ammable substances
(for example petrol, alcohols, naphtha, etc.).
6.5 Operational Faults:
If the lock-out signal lamp comes on:
• If the boiler does not function and the LCD
displays a code that starts with an Eand
the symbol (see “General LCD features”
on page 10) the boiler has shutdown.
• To restore its operation, press the reset
button 6 Figure 6.2 on the boiler control
panel.
• Signal given by the LCD display Figure
6.3.
• For the rst light up and following
maintenance procedures for the gas
supply, it may be necessary to repeat the
resetting operation several times so as to
remove the air present in the pipework.
Figure 6.2
6
Figure 6.3
If noises due to air bubbles are heard during operation:
• You should check that the pressure on the pressure gauge (Fig. 5.1 on page 12) is not
below the correct setting.
• If required, ll up the system correctly, as described in the section 5.2 of this manual.
• Bleed any air present in the radiators, if necessary.
If the pressure on the pressure gauge (Figure 5.1 on page 12) has gone down:
• It is necessary to ll up the appliance with water again, so as to raise the pressure to an
adequate level as described in the section 5.2 of this manual.
• If lling up with water has to be done very frequent, have the system checked for leaks.

20 RIVA ADVANCE COMBI USER MANUAL
6. Useful Advice Cont.
If water comes out of the pressure relief valve pipe H in Fig. 6.4:
• Check on the pressure gauge (gure 5.1 on page 12) that the pressure in the central heating
circuit is not close to 2 bars (30 psi). In this case, temperature 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 (14,5 psi), it
is advisable to vent some of the water in the appliance through the bleed valves present in
the heating system.
Figure 6.4
If water should occasionally leak from the boiler:
• Close the cocks connected to the inlet gas pipe and to the domestic cold water inlet pipe
under the boiler and call an Authorized Service Person.
In case of problems other than those mentioned here, switch off the boiler, as described
in Section 5.6 on page 16 and call a competent and responsible service person.
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H