Verona WALL HUNG GAS BOILER Manual

Riva HEAT ONLY
WALL HUNG GAS BOILER FOR
CENTRAL HEATING SUPPLY
BOILER INSTALLATION, OPERATION
INSTRUCTIONS
Please Read Instructions Carefully
Save for Future Reference
— Do not store or use gasoline or other flammable 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 fire department.
— Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
Manufactured by:
Biasi S.p.A.
Verona, Italy
Distributed By:
Quincy Hydronic Technologies, Inc.
80 Rochester AVE. Suite # 12
Portsmouth, NH 03801
Phone: [phone]
Fax: [phone]
RIVA HEAT ONLY MANUAL - REV
A

RIVA HEAT ONLY MANUAL - REV A 2

Dear Customer:
Thank you for buying a Biasi Riva Heating Only Boiler System.
The Riva Heating Only is a high efficiency, non-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 boiler 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 qualified,
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 satisfied with your boiler and its performance. We require that your contractor
complete efficiency 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 specific
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 specific 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 specific 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 boiler
has been tested to standard CSA 4.9 and is CSA compliant.
This Riva Heating Only boiler 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 affixed to the boiler), date
of installation and the name of your installer being on record in our files.
Thank you for purchasing our Riva Heating Only boiler. If you have questions or
comments, please don't hesitate to contact us immediately. Our goal is 100% customer
satisfaction.
QHT inc.
RIVA HEAT ONLY MANUAL - REV A 3

Table of Contents
Section Title Section Number Page Number
Warnings - 6-7
Important Information - 8
General Information 1 9
Technical Information (M130.30CR) 2 9-10
Parts List 3 11
Internal Piping and Parts List 4 12
Electric Diagrams 5 13
Installation Location 6 14
Exhaust Pipe Location 7 15
Mounting Bracket 8 16
Venting 9 17-20
Restrictor Sizing 9.1 17
Fitting the Flue System 9.2 17
Choice of Flue 9.3 18-20
Pipe Connections 10 21
Gas Pipe Connections 11 22
Electrical Connections/Wiring 12 23-25
Power Connection 12.1 23
Connection to the Electricity Supply 12.2 23
Room Thermostat Connection 12.3 24
Relay Panel Control Connection 12.4 24
Zone Valve Microswitch Connection 12.5 25
Circulator Sizing 13 26
Circ. Cap. as a Function of Flow Rate 13.1 26
Expansion Vessel 13.2 26
Piping 14 27-29
Primary-Secondary Piping 14.1 27
Primary-Secondary with Zone Valves 14.2 28
RIVA HEAT ONLY MANUAL - REV A 4

Table of Contents
Section Title Section Number Page Number
Manifold Piping with Zone Valves or Circ. 14.3 29
Commissioning 15 30-35
Initial Filling of the System 15.1 30
Lightning the Boiler 15.2 30
Checking the Gas Pres. at the Burner 15.3 31
Adjustment of the Gas Pressure 15.4 32
Checking the Ignition Device 15.5 32
Checking the Burner Ignition 15.6 33
Adjustment of the Useful c.h. Output 15.7 33
Labels Placement 15.8 34
Checking the Flue System and Comb. 15.9 35
Instructing the User 15.10 35
Gas Conversion 16 36
Annual Maintenance 17 37-38
Warnings 17.1 37
Dismantelling the External Panels 17.2 37
Emptying the C.h. System 17.3 37
Cleaning the Primary Heat Exch. 17.4 37
Checking the Pressuris. in C.h. Vess. 17.5 38
Cleanig the Burner 17.6 38
Checking the Flue 17.7 38
Visual Inspection of Appliance 17.8 38
Gas Pressures and Soundness 17.9 38
Installer Notes 18 39
RIVA HEAT ONLY MANUAL - REV A 5

Boiler is certified as an indoor appliance. Do not install boiler outdoors or locate where
it will be exposed to freezing temperatures.
W
ARNING
— Do not store or use gasoline or other flammable 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 fire department.
— Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
WARNING: If the information in this manual is not followed
exactly, a fire or explosion may result causing property
damage, personal injury or loss of life.
Caution: Do not store or use flammable materials, chemicals or flammable
liquids, especially gasoline, in the vicinity of this heating appliance.
DANGER
RIVA HEAT ONLY MANUAL - REV A 6

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 influenza, and the
highest incidence of poisoning occurs at the onset of cold weather or during flu 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:
W
ARNING
• Hot gasses from appliance, venting
system pipes or chimney, escaping into
the living space.
• Flames coming out around the appliance.
• Yellow colored flames in the appliance
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 HEAT ONLY BOILER.
• Stale or smelly air.
• The presence of soot or carbon in or
around the appliance.
• Very high unexplained humidity inside
the building.
RIVA HEAT ONLY MANUAL - REV A 7

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
flammable 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 fire 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 Technologies, 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)
Battery March Park
Quincy, Massachusetts, 02269
http://www.nfpa.org
CSA International
8501 E. Pleasant Valley Road
Cleveland, OH 44134-5575
http://www.csa-international.org
RIVA HEAT ONLY MANUAL - REV A 8

1. General Information
The Riva Heat Only is a high efficiency, non-condensing, wall mounted gas boiler
which provides central heat. The boiler features a gas valve which modulates the energy
input from 44,000 BTU/h to 108,000 BTU/h. The boiler is shipped fully assembled with the
components listed on page 11. All units are pressure and combustion tested at the factory
prior to shipping.
Key Features:
• Wall mountable - saving valuable floor
space.
• Several flue options available
• Electronic spark ignition
• Safety flow switch - positioned on the
main circuit, which monitors the flow
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.
2. Technical Information (M130.30CR)
GENERAL
Height in
27.7
Width in
15.7
Depth in
12.8
Weight lb
79.4
CENTRAL HEATING
Maximum working temp. °F 185
Temp. Regulation range* °F 100-176
Maximum pressure psi 30.0
Minimum pressure psi 4.35
Max head loss (at 4.4 GPM) ft 10
*At the minimum useful output
RIVA HEAT ONLY MANUAL - REV A 9

2.Technical Information Cont.
ENERGY CAPACITY
Nominal heat input
(0/2000ft) MBH 122.8
Nominal heat input
(2000/4500ft) MBH 116.7
Minimum heat input MBH 49.5
Maximum useful output
(0/2000ft) MBH 100.7
Maximum useful output
(2000/4500ft) MBH 95.9
Minimum useful output MBH 37.0
GAS SUPPLY PRESSURE
Gas Normal Min Max
Natural inwc 7.0 3.5 10.5
Propane inwc 11.0 8.0 12.0
GAS PRESSURE AT BURNER
Gas Min Max Ignition
Natural inwc 0.8 5.3 2.4
Propane inwc 1.4 9.0 5.2
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 flow rate
(0/2000ft) MBH 122.8
Nominal heat flow rate
(2000/4500ft) MBH 116.7
Min Exhaust temperature °F 262
Max Exhaust temperature °F 324
INJECTORS No. Size
Natural 14 130
Propane 14 89
GAS FLOW RATE
Gas Min Max
Natural ft³/h 48.7 121.1
Propane lb/h 2.23 5.55
ELECTRICAL
Voltage V 120
Frequency Hz 60
Current A < 1.6
Power consumption W 176
FLUE GAS FIGURES
Gas Min Max
CO2 2.5% 7.2%
O2 16.5% 8.1%
RIVA HEAT ONLY MANUAL - REV A 10

3. Parts List
Primary Components:
2
4
3
7
5
8
9
6
10
12
16
14
11
15
18
19
13
20 26
1
1 Pump
2 Pump vent plug
3 Automatic air purger valve
4 Modulation gas valve
5 Flame-detecting electrode
6 Ignition electrodes
7 Burner
8 Combustion chamber
9 Primary heat exchanger
10 Fan
11 Air pressure switch
12 Air switch pres. Test points
13 Safety thermostat
14 Modulation operator
15 Gas valve outlet pres. Test point
16 Gas valve inlet pres. Test point
17 Central heating expansion vessel
18 Central heating temp. Probe NTC
19 Central heating pressure relief valve
20 Primary circuit flow switch
21 Main circuit drain cock
22 By-pass valve
23 Venturi device
24 Flue outlet pipe
25 Air Intake Pipe
26 Control panel
27 Safety thermostat probe
28 Pressure reducing automatic fill valve
29 Backflow preventer
30 Gas supply line cock
31 Water supply inlet cock
RIVA HEAT ONLY MANUAL - REV A 11

4. Internal Piping & Parts List
23
11
25
24
20
9
6
15
1
4
16
3
22
17
10
5
18
14
27
7
21
28 29
30
19
31
Note: Pressure Relief Valve (#19) should be piped to a drain or to the floor as lose as
possible to a drain.
RIVA HEAT ONLY MANUAL - REV A 12

5. Electric Diagrams
ye bk wh gy bu rd
bk gy
gy
gy
M
~
t
probe NTC
C.h. temperature
COM
NO
M
~
COM
NO
NC
123 bk
bubn
rd
rd
gnyegywh
bu
rd
bk
bu
wh
gybugnye
bk bk
gygnye bu
bk
bk
bubu
bu
bu
rdbk
gygy
L N
rd bu bn gnye gnye
gnye bubn
burd
gnye
Flow Switch
Primary Circuit Pump
Valve
Gas
External controls
terminal
block
Electric supply
terminal
block
Fan Safety
Thermostat
Air Pressure
Switch
Ignition
Electrodes
Flame Detection
Electrode
bn - brown
bu - blue
bk - black
wh - white
rd - red
gy - grey
ye - yellow
gnye - green/yellow
wh
gy
rd
rd
bk
bu
bn
gy
ye wh bu rd
1
bk
rd
*
* ---> directly connected to the electronic ignition board
Caution: Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Verify proper operation after servicing
RIVA HEAT ONLY MANUAL - REV A 13

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 floor respectively. Each vent will have a free area of 54 square inches.
Outside
Air Opening
Air Opening
Each opening free area =
1 sq. inch per 2,000 BTU/h
0 to 12"
0 to 12"
Figure 6.2
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.
6. Installation Location
12.8 in
10.0 in
3.0 in
2.0 in
2.0 in
CLOSET INSTALLATION
MINIMU M PER MA NANT
CLE
A
R
A
NCE
FRON TVIEW SIDE VIEW CLOSET
INST
A
LL
A
TION
CLOSET INSTALLATION
SER
V
ICECLE
A
R
A
NCE
18.0 in
27.7 in
15.8 in
8.0 in
Note: For boilers in an enclosed
space it is recommended to install
a CO detector in the boiler room.
RIVA HEAT ONLY MANUAL - REV A 14

7. Exhaust Pipe Location
CAUTION
EXTERNAL VENT SURFACES ARE HOT.
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 4 feet below, 4 feet horizontally, or 1 foot above
any door, window or gravity inlet into any building.
3. The Vent hood shall not be less than 2 feet from an adjacent building.
4. The Vent hood shall be not less than 7 feet above grade when located adjacent to
public walkway.
5. The Vent hood shall be located so that flue gasses are not directed to jeopardize
people, overheat combustible structures, materials or enter buildings.
6. Minimum of 4 feet horizontal clearance from electric meters, gas meters, regulators
and relief equipment.
7. All joints in system are to be sealed to prevent leakage of products of
combustion in the building.
8. Avoid installing exhaust hood on the North, West, or the side of the house receiving
the prevailing winds.
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.
RIVA HEAT ONLY MANUAL - REV A 15

8. Mounting Bracket
After a suitable installation location is chosen, verify that the mounting wall is
properly braced and strong enough to support the 80 pound weight of the unit
when filled 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 final 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.
ø3.1 ø3.1
ø4.0
15.7
7.93.7
9.8 7.6 A
B
C
27.6
0.6 4.5 4.5 1.0
0.8
5.1
4.6 2.83.2
13.0
9.3
5.8
A&B
C
Figure 8.1
RIVA HEAT ONLY MANUAL - REV A 16

9. Venting
The Riva is a mechanical draft, side wall vented boiler. There are two flue options
available - separate and coaxial. The coaxial option has one configuration shown on the
next page. The separate option has two possible configurations shown on the following
pages.
9.1 Restrictor Sizing:
Each exhaust option is shipped standard with 3 feet of exhaust pipe, 3 feet of intake air
pipe. There is also a restrictor kit in which there are some restrictors that must be placed
in exhaust breech of fan on the top of the boiler (Fig. 9.1) according to the flue
configuration used.
If additional flue piping is need for a particular application, it can be ordered separately in
3 feet increments. Depending on the final flue pipe length, an alternative restrictor may be
required. Refer to the tables 9.1 for proper restrictor ring sizing
Figura 9.1
Coaxial 2.5/4.0 Restrictor Size
From 1.65 to 3.30 (ft) 41
From 3.30 to 8.86 (ft) 44
Separate 3.25/3.25 Restrictor Size
For 1.65 (in) and 1.65 (out) 38
From 3.30 to 39.40 (in+out) 41
Table 9.1
9.2 Fitting the flue system:
In general, it has to be taken in consideration that the orizontal sections of the flue
pipe must have an horizontal sloping not less than 1.5 degree (0.3 in per ft) towards
the boiler.
In the standard horizontal flue kit the flue pipe is angled within the air duct therefore the air
duct must be horizontally installed.
If one or more exstensions have to be used they must be adequately supported so that
there is no sag in the flue pipe and a minimum fall of 1.5 degree (0.3 in per ft) over the
whole lenght towards the boiler is ensured.
RIVA HEAT ONLY MANUAL - REV A 17

9. Venting Cont.
9.3 Choice of flue:
The following flue kits are available for connecting to the boiler:
AStandard coaxial horizontal flue kit (Exhaust & intake outside)
Figure 9.3 (Coaxial 2.4/4.0 inches – nominal lenght 3.3 ft)
It can be fitted to allow discharge to the rear or either side of the boiler via the
flanged boiler adapter elbow. Minimum lenght required is 1 ft. Maximum equivalent
lenght of 32.8 ft can be achieved utilising extensions. This flue system can only be
used to discharge horizontally, it is not designed to enable termination in the
vertical plane.
Installation:
• Drill hole A (on the wall template) through the outside wall.
• 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.
RIVA HEAT ONLY MANUAL - REV A 18

9. Venting Cont.
BStandard separate horizontal flue kit (Exhaust & intake outside)
Figure 9.4 (Twin pipe φ3.25 in)
Various twin (split) pipes kits and optional accessories (elbows) are available to
assist in the termination of the flue where the boiler is installed in a location remote
to an outside wall. These kits allow for separation of the air supply pipe from the
pipe that discharges the exhaust gasses. Consequently it is possible to extend the
flue system to a greater distance than that provided by the standard coaxial
horizontal flue.
If either an additional 45° or 90° accessory elbow is used then the maximum
permissible lenght of either pipe must be reduced by 3.0 ft or 5.4 ft respectively.
The sum of the lenghts of the two horizontal part must be less than 131 ft.
Installation:
• Drill holes B & C (on the wall template) through the outside wall.
• Cut the pipes as necessary so that no more than 6” of intake pipe protrudes
from the house and the exhaust pipe is a minimum of 4 inches longer than the
intake pipe.
• Slide the Intake and exhaust pipes through the respective holes.
• Slide one rubber wall trim piece on each pipe from inside and one from outside.
• Attach each collar to the boiler with the gasket and screws provided.
• Insert each elbow into its corresponding collar.
• Connect each pipe to its corresponding elbow (as shown in the diagram).
• Secure end cap on the intake and exhaust pipe outside the house.
RIVA HEAT ONLY MANUAL - REV A 19

9. Venting Cont.
CAlternative separate kit (Exhaust outside & intake inside)
Test Ports
Exhaust Collar
Exhaust Elbow
Exhaust Pipe
Rubber Wall Trim (2X)
Exhaust Pipe End Cap
Air Intake Elbow
Air Intake Pipe
Air Intake Collar
Figure 9.5 (Twin Pipe Φ3.25 in)
This configuration of the twin pipe kit allows to discharge the exhaust gasses
outside. The air supply is obtained with an air intake pipe. This allows to take air
from the room where the boiler is installed.
If either an additional 45° or 90° accessory elbow is used then the maximum
permissible lenght of either pipe must be reduced by 3.0 ft or 5.4 ft respectively.
Note: When utilizing this option, see page 14 for room ventilation details.
Installation:
• Drill hole C (on the wall template) through the outside wall.
• Cut the pipe as necessary so that no more than 6” protrudes from the house.
• Slide the exhaust pipe through the hole.
• Slide one rubber wall trim piece on the pipe from inside and one from outside.
• Attach each collar to the boiler with the gasket and screws provided.
• Insert each elbow into its corresponding collar.
• Connect each pipe to its corresponding elbow.
RIVA HEAT ONLY MANUAL - REV A 20