Biasi Riva Advance Combi Installation instructions

Riva
BOILER INSTALLATION, OPERATION
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 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 supply water.
We realize that it is not possible to answer all questions about the Riva Advance Combi system
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 MANUAL 3
Table of Contents
Section Title Section Number Page Number
Warnings - 5-6
Important Information - 7
General Information 1 8
Technical Information (M210.32 CM) 2 8-9
Parts List 3 10
Internal Piping and Parts List 4 11
Electric Diagrams 5 12-14
Sequence of Operation 5.1 13
Installation Location 6 15
Exhaust Pipe Location 7 16
Mounting Bracket 8 17
Venting 9 18-
Requirements for Massachusetts - 19
Fitting the Flue System 9.1 20
Choice of Flue 9.2 20
Pipe Connections 10 
Gas Pipe Connections 11 2
Electrical Connections/Wiring -3
Power Connection 12.1 3
Connection to the Electricity Supply 12.2 3
Room Thermostat Connection 12.3 3
Relay Panel Connection 12.4 3
Finishing 12.5 3
Installing the External Temperature Probe 12.6 3
Electric Connection Between the Boiler and
the External Probe 12.7 3
Remote Control Electric Connection 12.8 3
Remote Enabling Operation with the
External Probe 12.9 3
Circulator Sizing 13 
Circ. Cap. as a Function of Flow Rate 13.1 
Expansion Vessel 13.2 
Piping 14 -4
Primary-Secondary Piping 14.1 
Primary-Secondary with Zone Valves 14.2 
Manifold Piping with Zone Valves 14.3 4

4 RIVA ADVANCE COMBI MANUAL
Table of Contents
Section Title Section Number Page Number
Commissioning 15 42-53
For Proper System Operation, Make
Sure That 15.1 43
Initial Filling of the System 15.2 43
Condensate Pipe and Traps 15.3 44
Lightning the Boiler 15.4 45
Checking the Gas Pres. at the Burner 15.5 46
Gas Setting and Operations 15.6 46
15.7 49
Labels Placement 15.8 52
Checking the Flue System and Comb 15.9 52
Instructing the User 15.10 53
Gas Conversion 16 54-57
Annual Maintenance 17 58-63
Warnings 17.1 58
Dismantling the External Panels 17.2 58
Emptying the D.H.W. System 17.3 58
Emptying the D.H.W. Circuit 17.4 59
Combustion Analysis Check 17.5 59
Cleaning the Condensing Heat Exchanger
and Burner 17.6 59
Checking the Pressurization in the
Expansion Vessel 17.7 60
Cleaning the Burner 17.8 60
Checking the Flue 17.9 60
Drain Pipe Inspection 17.10 60
Visual Inspection of Appliance 17.11 60
Gas Pressures and Soundness 17.12 60
Water Inhibitor Concentration 17.13 61
Checking the Condensate Drain Pipe 17.14 61
Setting the Boiler Chimney Sweep Function 17.16 61
Spare Parts 18 64-68
Installer Notes 19 69-71
Lightning and Safety instructions 15 42
Checking the Low Water Cutoff 17.15 61

RIVA ADVANCE COMBI MANUAL 5
WARNING
Boiler is certied as an indoor appliance. Do not install boiler outdoors or locate where it will
be exposed to freezing temperatures.
— 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.
DANGER
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.

6 RIVA ADVANCE COMBI MANUAL
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.

RIVA ADVANCE COMBI MANUAL 7
IMPORTANT INFORMATION
Please read this page carefully.
• ALL BOILERS MUST BE INSTALLED IN ACCORDANCE WITH NATIONAL, STATE
AND LOCAL PLUMBING, HEATING AND ELECTRICALCODESAND 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. Where
required by the authority having jusrisdiction, the installation must conform to the Standard
for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD1. 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

8 RIVA ADVANCE COMBI MANUAL
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 with the components
listed on pages 10-11. 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

RIVA ADVANCE COMBI MANUAL 9
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 SUPPLY
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

10 RIVA ADVANCE COMBI MANUAL
3. Parts List
Primary Components:
1
2
4
6
7
8
9
10
11
3
5
23
22
21
19
16
14
13
18
24
15
17
12
20
1 Central heating pressure relief valve
2 Condensing heat exchanger air purger
valve
3 Ignition electrodes
4 Safety thermostat
5 Spark generator
6 Fan
7 Three-way diverter valve
8 D.h.w. heat exchanger
9 Primary circuit ow switch
10 C.h. temperature probe NTC
11 D.h.w. temperature probe NTC
12 Gas valve
13 Pump vent plug
14 Pump
15 Main circuit drain valve
16 Automatic air purger valve
17 Condensate trap
18 Air hose
19 Transformer
20 Air box (air/gas mixer)
21 Air pressure switch
22 Flame-detecting electrode
23 Burner
24 Condensing heat exchanger
25 Flue temperature probe NTC
26 D.h.w. ow switch
27 Gas valve inlet pressure test point
28 Gas valve outlet pressure test point
29 C.h. expansion tank
30 By-pass valve
31 Domestic water circuit lter
32 D.h.w. ow limiter
33 Flue outlet pipe
34 Air intake pipe
35 Flue exhaust sampling point
36 Air sampling point
37 Condensate drain pipe
38 C.h. return valve
39 Domestic cold water inlet valve
40 Gas inlet valve
41 D.h.w. outlet pipe
42 C.h. ow valve
43 Pressure reducing automatic ll valve
(Not Supplied)
44 Backow preventer (Not Supplied)
45 Water supply inlet cock

RIVA ADVANCE COMBI MANUAL 11
4. Internal Piping & Parts List
8
1
31
4
2
25
34
3
22
24
20
35
36
33
26
7
11
41
39
42
43
44
45
38
4037
17 15
30
9
10
14
29
12
27
28
16
6
23
32
Note: Pressure Relief Valve (#1) should be piped to a drain or to the oor as close as
possible to a drain.
Note: Figure is not intended to be a piping diagram, please refer to piping section of
manual for piping practices and locations.

12 RIVA ADVANCE COMBI MANUAL
5. Electric Diagrams
Caution:
Label all wires prior to disconnection when servicing controls. Wiring errors can
cause improper and dangerous operation.
Verify proper operation after servicing.
LD1LD2LD3
F1F2
K1
K2
K3
K4
LD4
P6
T3
X1
X2
X3
X5
X6
X7 X10X11
X12
X13
X17
X23
X24
P3
X14
X15
SB1
X16
X22
X9
BL BR
W
GY
BLWGYBR
123
LN
Y/GBLBR
R
BL
BR BL
Y/G
BK BL
GY
Y/GBL
M
~
R
BL
BK
3
2
1
Y/G
BL GY RBKBLBL BK
Y/G
BK
BL
BK
1
3
4
Y/G
BL BR
BR BL
WO W
GY
t
t
BK
R
R
BK
BL
BL
BL
BL
R
W
BL
W
BLR
M
~
R
BK GY
W
R
GY
W
BK
t
BR
BL
W
BK
BKW
BRBL
COM
NO
R
R
RR
GY
BK
GY
External controls
terminal block
Electric supply
terminal block
Pump
Three-way
diverter valve
Gas valve
CH temperature
probe NTC
DHW temp.
probe NTC
DHW flow
switch
Safety
thermostat
Flue probe
Primary
circuit flow
switch
Fan
Ignition
electrodes
Flame
detection
electrode
Transformer
120V~/24V~
Spark
Generator
RBK
RBKWGY
W
GY
Remote External
temp. probe
terminal block
R
R
WW
Display LCD
GY
BK
Air pressure
switch
CO
M
NC NO
1 6
8
11
1
2
3
W
GY
BL Blue GY Gray Y/G Yellow/Green
BK Black O Orange W White
BR Brown R Red

RIVA ADVANCE COMBI MANUAL 13
5. Electric Diagrams Cont.
5.1 Sequence of Operation:
Is boiler locked out?
NO
Switch in thefunctionmode
Ta king
waterfromthe domestic hot
watercircuit?
YEScirculator off
fanstill
circulator on
Is primarycircuit
temperaturehigherthan that
selected?
YES
Main circuitpressure
switch consense?NOYES
NO
NO
starts fan
checks fanrpm
YES
cancelslock
Is fanrpm
exact?
NO YES
Is flue
temperaturehigherthan 110°C?
YES
NO
beginningofwaitperiod
Endofwait
period?
YESNO
YES
starts ignition discharges
Opensgas valve
beginningofignitionperiod
flamepresence? YES
interruptsignition discharges
gasvalve open
fanruns
Endofignition
period?
NO
NO YES
closes gasvalve
stopsfan
interruptsignitiondischarges
turnsonlock --- outlight
indicates lock
resetpush--- button
pressed?
flamepresence? NO
NO
Is fanrpm
exact? YES
NO
safety thermostat or flue
temperatureprobe lock out? YESNO
YES
YES
YES
flamepresence?
LCD
E04 +
LCD
E05 +
LCD
E09 +
NO
Thermal control in the mode

14 RIVA ADVANCE COMBI MANUAL
5. Electric Diagrams Cont.
lockmemorised?
NO
Switch in thefunctionmode
Ta king
waterfromthe domestic hot
watercircuit?
Requestfor heat from
room thermostat?
Seefunctioning with thefunction
controlinthe mode
(sec.9.11)
YES
circulator off
fanstill
NO
circulator on
Is primary circuit
temperaturehigherthanthat
selected?
YES
Main circuitpressure
switch consense?NO
YES
NO
NO
starts fan
checks fanrpm
YES
cancelslock
Is fanrpm
exact?
NO YES
Is flue
temperaturehigherthan110°C?
YES
NO
beginning of wait period
Endofwait
period?
YESNO
starts ignition discharges
Opensgas valve
beginningofignitionperiod
flamepresence? YES
interruptsignition discharges
gasvalve open
fanruns
Endofignition
period?
NO
NO YES
closesgas valve
stopsfan
interruptsignition discharges
memorizeslock
turnsonlock --- outlight
resetpush--- button
pressed?
flamepresence? NO
NO
Is fanrpm
exact? YES
NO
safety thermostat or flue
temperatureprobe lock out? YESNO
YES
YES
YES
YES
flamepresence?
LCD
E04 +
LCD
E09 +
LCD
E05 +
Thermal control in the mode

RIVA ADVANCE COMBI MANUAL 15
6. Installation Location
The installation location chosen must:
• Comply with all clearances listed below.
• Provide suitable location for the exhaust and intake venting.
• Not be installed in an unheated space.
• Comply with all local codes and standards.
Note: Dimensions shown are minimums. Greater clearances will simplify installation
and service.
Figure 6.1
WARNING: Do not install the boiler on carpeting
If the boiler is to be installed in an enclosed room with no fresh air intake, the room must have
proper vent louvers installed. There should be two louvers, place each within 12” of the ceiling
and oor respectively. Each vent will have a free area of 54 square inches.
3.0in
2.0in
10.0 in
2.0in
CLOSET INST
A
LL
A
TI ON
MINIMUM PERMANAN T
CLE
A
R
A
NCE
FR ON TVIEWSID EVIEWCLOSET
INST
A
LL
A
TI ON
CLOSET IN ST
A
LL
A
TI ON
SER
V
ICECLE
A
R
A
NCE
18.0 in
31.6 in
8.0in15.8 in
15.2 in
Figure 6.2
Outside
Air Opening
Air Opening
Each opening free area =
1 sq. inch per 2,000 BTU/h
0 to 12"
0 to 12"
When choosing an installation location insure the exhaust and intake pipes comply with NFPA
54. The drawing on the next page illustrates the restrictions on exhaust locations.
Note: For boilers in an enclosed space
it is recommended to install a CO
detector in the boiler room.

16 RIVA ADVANCE COMBI MANUAL
7. Exhaust Pipe Location
CAUTION
EXTERNAL VENT SURFACES ARE HOT.
IT IS RESPONSABILITY OF THE HOMEOWNER TO KEEP THE VENT
TERMINAL CLEAR OF SNOW AND ICE
NOTE: USE ONLY LISTED COMPONENTS SUPPLIED WITH THE BOILER.
SURFACE DISCOLORATION OF THE BUILDING MAY OCCUR DUE TO
IMPROPER INSTALLATION. QHT WILL NOT ACCEPT RESPONSIBILITY OR
LIABILITY FOR SUCH DISCOLORATION.
The exhaust hood must be installed on the leeward side of house and conform to the
following guidelines:
1. The vent hood shall not be less than 3 feet above any forced air inlet to the house.
2. The vent hood shall not be less than 1 feet below, 1 feet horizontally, or 1 foot above any
door, window or gravity inlet into any building.
3. The vent hood shall not be less than 12” above normal snow level.
4. The vent hood shall not be less than 2 feet from an adjacent building.
5. The vent hood shall be not less than 7 feet above grade when located adjacent to public walkway.
6. The vent hood shall be located so that ue gasses are not directed to jeopardize people,
overheat combustible structures, materials or enter buildings.
7. Minimum of 4 feet horizontal clearance from electric meters, gas meters, regulators and
relief equipment.
8. All joints in system are to be sealed to prevent leakage of products of combustion
in the building.
9. Avoid installing exhaust hood on the North, West, or the side of the house receiving the
prevailing winds.
10. The vent should not be situated so that the ue gases are directed towards brickwork,siding, or other
construction , in such a manner that may cause damage from heat or condensate from the ue gases.

RIVA ADVANCE COMBI MANUAL 17
8. Mounting Bracket
After a suitable installation location is chosen, verify that the mounting wall is properly braced
and strong enough to support the 110 pound weight of the unit when lled with water.
NOTE: The boiler shall be installed such that the gas ignition system components are
protected from water and liquids in general (dripping,spraying, rain, etc) during
the appliance operation and service.
Use the paper template provided with the boiler to determine the location of the mounting
bracket. Securely mount the bracket to the wall using appropriate hardware for the particular
wall construction.
Mounting Steps:
1. Tape the paper template to the wall in the chosen location. Be sure to level the template.
2. Pre-drill two holes in the center of the “oval” slots on the mounting bracket, sized for
the hardware being used.
3. Mount the bracket to the wall. Be sure to level the bracket by adjusting the screw in
the vertical slot.
4. Pre-drill the remaining hole in the mounting bracket and secure the nal screw.
5. Mark and drill the exhaust/intake pipe holes through the house. If you are using a
coaxial pipe system, drill the hole marked A (ø 4”) in the drawing below and on the
paper template. If you are using a separate pipe system drill holes marked B and C
(ø 3.25”) shown below as well as on the paper template.
6. Remove paper template and hang boiler on bracket.
Figure 8.1
Boiler front
ø3.15ø3.15
ø3.94
15.75
7.87
9.65
7.72
31.61
27.56
1.38
4.53 5.59
0.63
1.22
2.36 2.36
3.94 10.12
7.87
2.562.522.242.36
1.97
4.73
14.17
8.54
4.73
ø3.15
ø3.15ø3.15
ø3.94
15.75
7.87
9.65
7.72
31.61
27.56
1.38
4.53 5.59
0.63
1.22
2.36 2.36
3.94 10.12
7.87
2.562.522.242.36
1.97
4.73
14.17
8.54
4.73
ø3.15
A
A
B
B
C C
C
D
J
E
F
G H I
A - Air intake/ue outlet pipe (co-axial)
B - Flue outlet pipe ø 80 mm (twin kit)
C - Air intake pipe ø 80 mm (twin kit)
D - Electric connections area
E - C.h. ow
F - D.h.w. outlet
G - Gas
H - D.c.w. inlet
I - C.h. return
J - Condensate drain connection area

18 RIVA ADVANCE COMBI MANUAL
9. Venting
The Riva Advance Combi is a mechanical draft, side wall vented boiler. There are two side
wall ue options available – separate and coaxial. The coaxial option has one conguration
shown on the next page. The separate option has two possible congurations shown on the
following pages. There is also a vertical roof venting option. Regardless of what vent kit is
installed, they should all conform to the Provisions for combustion and ventilation air in
accordance with section 5.3, Air for Combustion and Ventilation, of the National Fuel
Gas Code, ANSI Z223.1, or Sections 7.2, 7.3 or 7.4 of CAN/CGA B149, Installation Codes,
or applicable provisions of the local building codes.
If the Biasi Riva Advance Combi replaces a boiler that was attached to a common vent system,
the common venting system is likely to be too large for proper venting of the appliances
remaining connected to it. To ensure the remaining appliances will function properly, the test
procedure below should be followed:
At the time of removal of an existing boiler, the following steps shall be followed with each
appliance remaining connected to the common venting system placed in operation, while the
other appliances remaining connected to the common venting system are not in operation.
(a) Seal any unused openings in the common venting system.
(b) Visually inspect the venting system for proper size and horizontal pitch and determine
there is no blockage or restriction, leakage, corrosion and other deciencies which could
cause an unsafe condition.
(c) Insofar as is practical, close all building doors and windows and all doors between the
space in which the appliances remaining connected to the common venting system are
located and other spaces of the building. Turn on clothes dryers and any appliance not
connected to the common venting system. Turn on any exhaust fans, such as range
hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate
a summer exhaust fan. Close replace dampers.
(d) Place in operation the appliance being inspected. Follow the lighting instructions. Adjust
thermostat so appliance will operate continuously.
(e) Test for spillage at the draft hood relief opening after 5 minutes of main burner operation.
Use the ame of a match or candle, or smoke from a cigarette, cigar or pipe.
(f) After it has been determined that each appliance remaining connected to the common
venting system properly vents when tested as outlined above, return doors, windows,
exhaust fans, replace dampers and any other gas-burning appliance to their previous
condition of use.” (g) Any improper operation of the common venting system should be
corrected so the installation conforms with the National Fuel Gas Code, ANSI Z223.1 and/
or CAN/CGA B149, Installation Codes. When resizing any portion of the common venting
system, the common venting system should be resized to approach the minimum size as
determined using the appropriate tables in Part 11 of the National Fuel Gas Code, ANSI
Z223.1 and/or CAN/CGA B149, Installation Codes.

RIVA ADVANCE COMBI MANUAL 19
The Commonwealth of Massachusetts requires compliance with regulation 248 CMR 4.00 and
5.00 for installation of through – the – wall vented gas appliances as follows:
(a) For direct-vent appliances, mechanical-vent heating appliances or domestic hot water
equipment, where the bottom of the vent terminal and the air intake is installed below four feet
above grade the following requirements must be satised:
1. If there is not one already present, on each oor level where there are bedroom(s),
a carbon monoxide detector and alarm shall be placed in the living area outside the
bedroom(s). The carbon monoxide detector shall comply with NFPA 720 (2005 Edition).
2. A carbon monoxide detector shall be located in the room that houses the appliance or
equipment and shall:
a. Be powered by the same electrical circuit as the appliance or equipment such that
only one service switch services both the appliance and the carbon monoxide
detector;
b. Have battery back-up power;
c. Meet ANSI/UL 2034 Standards and comply with NFPA 720 (2005 Edition);and
d. Have been approved and listed by a Nationally Recognized Testing Laboratory
as recognized under 527 CMR.
3. A Product-approved vent terminal must be used, and if applicable, a Product-approved
air intake must be used. Installation shall be in strict compliance with the manufacturer’s
instructions. A copy of the installation instructions shall remain with the appliance or
equipment at the completion of the installation.
4. A metal or plastic identication plate shall be mounted at the exterior of the building, four
feet directly above the location of vent terminal. The plate shall be of sufcient size to be
easily read from a distance of eight feet away, and read “Gas Vent Directly Below”.
(b) For direct-vent appliances, mechanical-vent heating appliances or domestic hot water
equipment where the bottom of the vent terminal and the air intake is installed above four
feet above grade the following requirements must be satised:
1. If there is not one already present, on each oor level where there are bedroom(s),
a carbon monoxide detector and alarm shall be placed in the living area outside
the bedroom(s). The carbon monoxide detector shall comply with NFPA 720 (2005
Edition).
2. A carbon monoxide detector shall:
a. Be located in the room that houses the appliance or equipment;
b. Be either hard-wired or battery powered or both; and
c. Shall comply with NFPA 720 (2005 Edition).
3. A Product-approved vent terminal must be used, and if applicable, a Product-
approved air intake must be used. Installation shall be in strict compliance with the
manufacturer’s instructions. A copy of the installation instructions shall remain with
the appliance or equipment at the completion of the installation.
9. Venting Requirements for the State
of Massachusetts

20 RIVA ADVANCE COMBI MANUAL
9. Venting Cont.
9.1 Fitting the ue system:
In general, it has to be taken in consideration that the horizontal sections of the ue
pipe must have an horizontal sloping not less than 1.5 degree (0.3 in per ft) towards the
boiler.
In the standard horizontal ue kit the ue pipe is angled within the air duct therefore the air duct
must be horizontally installed.
If one or more extensions have to be used they must be adequately supported so that there
is no sag in the ue pipe and a minimum fall of 1.5 degree (0.3 in per ft) over the whole length
towards the boiler is ensured.
9.2 Choice of ue:
The following ue kits are available for connecting to the boiler:
A Standard coaxial horizontal ue kit (Exhaust & intake outside) - PART# RI-9990387
Figure 9.1 (Coaxial 2.4/4.0 inches – nominal length 3.3 ft)
It can be mounted to allow discharge to the rear or either side of the boiler via the anged boiler
adapter elbow. Minimum length required is 1.5 ft. Maximum equivalent length of 33 ft can be
achieved utilizing extensions. This ue system can only be used to discharge horizontally, it is
not designed to enable termination in the vertically.
Installation:
• Drill a hole 4.5” in diameter through the outside wall that is less than 18” thick.
• Cut the pipe as necessary so that a no more than 6” protrudes from the house.
• Slide the intake and exhaust pipes through the hole.
• Slide one rubber wall trim piece on the pipe from inside and one from outside.
• Connect exhaust (inner) pipe to concentric elbow.
• Connect intake (outer) pipe to concentric elbow.
• Secure elbow to boiler using gasket and four screws provided.
• Secure end cap on the intake pipe outside the house.