Rinnai M090C, M060C, M160C, M120C Installation Manual

INSTALLATION AND OPERATION MANUAL

M-Series Condensing Boiler

Wall-Mounted, Gas-Fired Combi Boiler

Central Heating and Domestic Hot Water

MODELS

M060C

M090C

M120C

M160C

Certified to ANSI Z21.13 and CSA 4.9

WARNING If the information in these instructions are not followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of

life.

•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 electrical 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 cannot reach your gas supplier, call the fire department.

•Installation and service must be performed by a qualified installer, service agency or the gas supplier.

READ AND SAVE THIS MANUAL

Rinnai M-Series Condensing Boiler Combi Manual

1. Welcome...........................................................................................................................		4
2. Safety................................................................................................................................		5
2.1	Safety Symbols ...........................................................................................................................	5
2.2	Safety Precautions......................................................................................................................	5
3. About the Boiler ................................................................................................................		7
3.1	Front View ..................................................................................................................................	7
3.2 Bottom View...............................................................................................................................		8
3.3 Components ...............................................................................................................................		9
3.4	Specifications............................................................................................................................	10
3.5 Dimensions ...............................................................................................................................		11
3.6	Accessories ...............................................................................................................................	13
3.7 How to Remove the Front Panel ..............................................................................................		14
4. Installation ......................................................................................................................		15
4.1	Installation Guidelines..............................................................................................................	15
4.2 What You’ll Need......................................................................................................................		16
4.3	Items Included..........................................................................................................................	17
4.4	Choose an Installation Location ...............................................................................................	18
4.5 Mount the Boiler to the Wall ...................................................................................................		20
5. Venting ...........................................................................................................................		21
5.1	Guidelines.................................................................................................................................	21
5.2	Venting Installation Sequence..................................................................................................	22
5.3 Termination Considerations.....................................................................................................		22
5.4	Venting Options........................................................................................................................	23
6. Gas Supply ......................................................................................................................		43
6.1 Connect the Gas Supply............................................................................................................		43
6.2	Gas Operating Instructions.......................................................................................................	45
6.3	Gas Pipe Sizing Reference Tables .............................................................................................	46
7. DHW System Piping .........................................................................................................		48
7.1	Guidelines.................................................................................................................................	48
7.2	Instructions...............................................................................................................................	48
7.3 Piping Diagram for a Basic DHW Installation............................................................................		49
8. CH System Piping.............................................................................................................		50
8.1	Guidelines.................................................................................................................................	50
8.2	Instructions...............................................................................................................................	50
8.3 Common CH Components ........................................................................................................		51
8.4 Piping Diagram for a Basic CH System (With Hydraulic Separation)........................................		53
8.5	Hydraulic Separation ................................................................................................................	54
8.6 Connect the Pressure Relief Valves (DHW and CH)..................................................................		55

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8.7 Connect the Condensate Drain Line.........................................................................................		56
9. Power Supply ..................................................................................................................		58
9.1 Guidelines.................................................................................................................................		58
9.2 Electrical Connections ..............................................................................................................		59
9.3 Post-Power Supply Connection Checklist.................................................................................		59
10. Commissioning ..............................................................................................................		60
10.1 Safety Precautions..................................................................................................................		60
10.2	Instructions.............................................................................................................................	60
10.3 Air Purge Process....................................................................................................................		63
11. Post-Installation Checklist .............................................................................................		64
12. Operation......................................................................................................................		66
12.1 Start-Up Information..............................................................................................................		66
12.2 Control Panel..........................................................................................................................		67
12.3	Basic Operation Settings.........................................................................................................	70
12.4 Parameter Settings .................................................................................................................		75
12.5 Outdoor Reset Control ...........................................................................................................		80
12.6 Diagnostic Codes ....................................................................................................................		86
12.7 Forced Hi/Low Fire Modes .....................................................................................................		87
12.8 Freeze Protection ...................................................................................................................		88
13. Maintenance .................................................................................................................		89
13.1 Owner Maintenance...............................................................................................................		89
13.2 Licensed Professional Maintenance.......................................................................................		90
13.3	Test the Ignition Safety Shut Off Device.................................................................................	92
14. Appendices....................................................................................................................		93
14.1	Approved Cleaners, Inhibitors and Antifreezes.....................................................................	93
14.2	Flush the CH Plumbing System..............................................................................................	94
14.3	Boiler Parts ............................................................................................................................	95
14.4	System Application Examples..............................................................................................	103
14.5 Gas Conversion.....................................................................................................................		109
14.6 Wiring Diagram.....................................................................................................................		113
14.7 Ladder Diagram ....................................................................................................................		114
14.8	CH Pressure Drop and Flow Curve.......................................................................................	115
14.9	DHW Pressure Drop and Flow Curve...................................................................................	116
14.10 Resistance/Temperature Table for Sensors .......................................................................		117
14.11 Remove a Boiler from a Common Vent System .................................................................		118
14.12 Massachusetts State Gas Regulations ................................................................................		119
14.13 Warranty ............................................................................................................................		120

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1

Thank you for purchasing a Rinnai Condensing Boiler. Before installing and operating this boiler, be sure to read these instructions completely and carefully to familiarize yourself with the boiler’s features and functionality.

•You must read the entire manual to properly operate the boiler.

•Keep this manual for future reference.

•As when using any appliance generating heat, there are certain safety precautions you should follow. See section “2.2 Safety Precautions” for detailed safety precautions.

•Be sure your boiler is installed by a licensed installer.

•If installing in the state of Massachusetts, read section “14.12 Massachusetts State Gas Regulations” in this manual.

Following is a list of common acronyms and abbreviations used in this manual:

	ANSI	American National Standards
		Institute
	Btu	British Thermal Unit
	CH	Central Heating
	DHW	Domestic Hot Water
	GPM	Gallons per minute
	LP	Liquid Propane
	LWCO	Low Water Cut Off
	NG	Natural Gas
	PP	Polypropylene
	PRV	Pressure Relief Valve
	PSI	Pounds per square inch
	W.C.	Inches water column

•A trained and qualified professional must install the boiler, inspect it, and leak test it before use. The warranty will be voided due to any improper installation.

•The trained and qualified professional should have skills such as:

−Gas line sizing

−Connecting gas lines, water lines, valves, and electricity

−Knowledge of applicable national, state, and local codes

−Installing venting through a wall or roof

−Training in installation of condensing boilers. Training on Rinnai M-Series Condensing Boilers is accessible at www.trainingevents.rinnai.us.

•Read all instructions in this manual before installing the boiler. The boiler must be installed according to the exact instructions in this manual.

•Proper installation is the responsibility of the installer.

•When installation is complete, leave this manual with the boiler or give the manual directly to the consumer.

For Your Records

Dealer Name:

Dealer Phone:

Purchase Date:

Serial #:

Located on left side of unit

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2

WARNING

•If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury, or death.

•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 electrical 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 cannot reach your gas supplier, call the fire department.

•Installation and service must be performed by a qualified installer, service agency or the gas supplier.

•The warning signs in this manual are here to prevent injury to you and others. Please follow them explicitly.

This manual contains the following important safety symbols. Always read and obey all safety messages.

Safety alert symbol. Alerts you to potential hazards that can kill or hurt you and others.

DANGER

Indicates an imminently hazardous situation which, if not avoided, will result in personal injury or death.

Rinnai M-Series Condensing Boiler Combi Manual

WARNING

Indicates a potentially hazardous situation which, if not avoided, could result in personal injury or death.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It may also be used to alert against unsafe practices.

The following precautions apply to the installer and consumer. Read and follow all instructions in this section.

•Before operating, smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

•Keep the area around the appliance clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

•Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

•Combustible construction refers to adjacent walls and ceiling and should not be confused with combustible or flammable products and materials. Combustible and/or flammable products and materials should never be stored in the vicinity of this or any gas appliance.

•Always check the water temperature before entering a shower or bath.

5

•Do not use this appliance if any part has been under water. Immediately call a licensed professional to inspect the appliance and replace any part of the control system and any manual gas control valve which has been under water.

•Do not use substitute materials. Use only parts certified for the appliance.

•Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.

•It is strongly recommended that you use a trained and qualified professional who has attended a Rinnai installation training class to adjust parameter settings.

•Do not use an extension cord or adapter plug with this appliance.

•Any alteration to the appliance or its controls can be dangerous and will void the warranty.

•To protect yourself from harm, before performing maintenance:

−Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the circuit breaker. (The boiler controller does not control the electrical power.)

−Turn off the gas at the gas control, usually located immediately below the boiler.

−Turn off the incoming water supply. This can be done at the isolation valve immediately below the boiler for the domestic hot water. Turning off the water for the central heating system is done at the boiler system filling station shut-off valve or the main water supply to the building.

−Use only your hand to turn the manual gas control valve. Never use tools. If the manual gas control valve will not turn by hand, do not try to repair it; call a trained and qualified professional. Force or attempted repair may result in a fire or explosion.

•Proper venting is required for the safe operation of this appliance. Failure to properly vent this appliance can result in death, personal injury and/or property damage.

•Flammable liquids such as cleaning solvents, aerosols, paint thinners, adhesives, gasoline and propane must be handled and stored with extreme care. These flammable liquids emit flammable vapors and when exposed to an ignition source can result in a fire hazard or explosion. Flammable liquids should not be used or stored in the vicinity of this or any other gas appliance.

•DO NOT operate the boiler without the front panel installed. The front panel should only be removed for service/ maintenance or replacing internal components.

•BURN HAZARD. Hot exhaust and vent may cause serious burns. Keep away from the boiler. Keep small children and animals away from the boiler.

•Heating supply, return and domestic hot water outlet pipes leaving the boiler can be hot to touch.

•Install the vent system per local and national codes.

•Do not install this boiler above 10,200 ft (3,109 m).

•Do not obstruct combustion air to the boiler.

•Rinnai recommends that every home have a carbon monoxide (CO) alarm in the hallway near bedrooms in each sleeping area. Check batteries monthly and replace them annually.

•California law requires the following Proposition 65 warning to be provided:

WARNING

This product can expose you to chemicals including Nickel compounds, Lead and Lead compounds which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

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Topics in this section

•Front View

•Bottom View

•Components

•Specifications

•Dimensions

•Accessories

•How To Remove the Front Panel

The M-Series Condensing Boiler is a wall-mounted, gas-fired boiler designed to providing heating and domestic hot water.

For complete boiler information, refer to the “Rinnai M-Series Condensing Boiler Installation Manual” supplied with the boiler, or visit rinnai.us.

Vent Connections

Controller

(front cover removed)

Piping Connections (visible

below boiler)

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Central	DHW	Gas	DHW	Central
Heating	Hot Outlet		Cold Inlet	Heating
Supply				Return

All items are field-supplied unless otherwise noted.

Supply to CH System

Return from CH System

Primary-Secondary Heating Kit

CH Pressure Relief Valve (supplied with boiler)

CH Supply

Condensate Drain

Domestic Hot Water

Domestic Cold Water

Gas

CH Return

Domestic Hot Water Pressure Relief Valve

Central Heating Temperature Pressure

Gauge (supplied with boiler)

Gas Shut Off Valve

8	Rinnai M-Series Condensing Boiler Combi Manual

Exhaust Intake

Located behind #6 (Silencer)

	Located
	behind
	#6 (Silencer)

	1	iCon Heat Exchanger
	2	Burner Hood with Burner Cassette
	3	Fan with Integrated Venturi
	4	Gas Valve
	5	Ignition Unit
	6	Silencer
	7	Condensate Tray
	8	Flue Gas Exhaust/Air Intake with
		Measuring Points

9	Automatic De-aerator
10	Control Panel
11	Pressure Sensor
12	Modulating Pump
13	Plate Heat Exchanger
14	Diverter Valve
15	Flow Sensor
16	Condensate Trap

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Model			M060C		M090C	M120C		M160C
Dimensions - w, h, d			17 in. x 28 in. x 10 in. (439 mm x 699 mm x 264 mm)
Weight			77 lb (35 kg)			83.6 lb (38 kg)
Appliance Type			Wall-Mounted, Gas-Fired Combi Boiler
Installation Type					Indoor
Ignition System					Direct Electronic Ignition
Heat Exchanger Type			iCon1			iCon2
Heat Exchanger Surface Area			7.3 sq ft			11.8 sq ft
	Minimum		NG: 17,000			NG: 23,500
Gas			LP: 31,500			LP: 73,500
Consumption	Maximum (Central		60,000		90,000	120,000		160,000
(Btu/h)	Heating)
	Maximum (DHW)		103,000			160,000
Temperature	Central Heating			68° F - 185° F (20° C - 85° C)
	(Min - Max)
Setting
	DHW (Min - Max)		104° F - 149° F (40° C - 65° C)
					1.4	1.4		1.4
			1 Gallon			Gallons
	Central Heating				Gallons			Gallons
			3.8 Liters			5.2 Li-
Water					5.2 Liters			5.2 Liters
						ters
Content
			.05 Gallons		.08	.08		.08
	DHW				Gallons	Gallons		Gallons
			.2 Liters
					.3 Liters	.3 Liters		.3 Liters
Water Supply	Central Heating		Minimum: 19 PSI			Maximum: 45 PSI
	DHW				150 PSI (maximum)
Pressure
	Pressure Relief Valve				30 PSI
Pump Model					Grundfos UPER 15-78
Sound Level			46 dB			54 dB
	Normal	Central	155 W		177 W	164 W		191 W
		Heating
Electrical		DHW	185 W		191 W	191 W		191 W
Data	Standby				3.5 W
	Max Current				1.97 Amps (maximum)
	Fuse				5 Amps
Gas	Natural Gas				3.0 in. - 10.5 in. W.C.
Supply
	Propane				8.0 in. - 13.5 in. W.C.
Pressure
Electric Connections					AC 120 Volts, 60Hz.
Energy Star Qualified			Recognized as the Most Efficient of ENERGY STAR®
Certifications					ANSI Z21.13, CSA 4.9

1Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature. Minimum activation flow is 0.4 GPM (1.5 L/min).

2The maximum gas supply pressure must not exceed the value specified by the manufacturer. Rinnai products are continually being updated and improved; therefore, specifications are subject to change without prior notice.

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Measurements: in. (mm)

Vent Top Connections 3 in. (80 mm) PP, 3 in. PVC, 3/5 in. Concentric, 2 in. (60 mm) PP, 2 in. PVC

Rinnai M-Series Condensing Boiler Combi Manual

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	Gas
Domestic Hot Water	Domestic Cold
Outlet		Water Inlet

Central Heating	Central Heating
Supply	Return

	Connection	Connection Size with Provided
		Adapters
	Gas	3/4 in. NPT
	DWH In (Cold Inlet)	3/4 in. NPT
	DHW Out (Hot Outlet)	3/4 in. NPT
	CH In (CH Return)	1 in. NPT
	CH Out (CH Supply)	1 in. NPT

12	Rinnai M-Series Condensing Boiler Combi Manual

The following optional accessories are available for the Rinnai M-Series Condensing Boiler.

CONDENSATE NEUTRALIZER

SCALECUTTER

Neutralizes the condensate generated by the boiler.

SCALECUTTER REFILL CARTRIDGE

Refill cartridge for the ScaleCutter filter assembly.

PRIMARY SECONDARY HEATING KIT

PN: 803000023

Filters and reduces the amount of scale entering the boiler allowing for greater boiler longevity.

DHW ISOLATION VALVE KIT

For quick isolation of the boiler DHW connections.

BOILER TOOLKIT

PN: 809000024

Set of specific tools recommended for boiler service.

Rinnai M-Series Condensing Boiler Combi Manual

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IMPORTANT

Do not operate the boiler without the front panel installed. The front panel should only be removed for service/maintenance or replacing internal components.

You Will Need:

•

1

Philips head screwdriver

Using a Philips head screwdriver, remove the 2 screws from the top of the boiler.

TIP

Be careful not to lose the screws. You’ll need them when reinstalling the front cover.

2 Lift the tab slightly above the peg.

3	To remove, carefully lift the panel up
	and off to release it from the boiler.

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Topics in this section

•Installation Guidelines

•What You’ll Need

•Items Included

•Choose an Installation Location

•Mount the Boiler to the Wall

THIS SECTION IS INTENDED

FOR THE INSTALLER

Installer qualifications: A trained and qualified professional must install the appliance, inspect it, and leak test the boiler before use. The warranty will be voided due to any improper installation. The trained and qualified professional should have skills such as: Gas sizing; Connecting gas lines, water lines, valves, and electricity; Knowledge of applicable national, state, and local codes; Installing venting through a wall or roof; and training in installation of condensing boilers. Training for Rinnai Condensing Boilers is accessible online at www.trainingevents.rinnai.us.

•This boiler is certified for installation in residential and commercial applications.

•This boiler is suitable for combination water heating and central heating.

•The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1. If installed in a manufactured home, the installation must conform with the

Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280 and/or CAN/SCA Z240 MH Series, Mobile Homes.

Rinnai M-Series Condensing Boiler Combi Manual

•The appliance, when installed, must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANSI/ NFPA 70, or the Canadian Electrical Code, CSA C22.1.

•The appliance and its main gas valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa) (13.84 in W.C.). For system testing at pressures less than or equal to 1/2 psi (3.5 kPa) (13.84 in W.C.) the appliance must be isolated from the gas supply piping by closing its individual manual shutoff valve.

•You must follow the installation instructions and those in section “5. Venting” for adequate combustion air and exhaust.

•If this boiler’s DHW system is connected to a closed water supply system, such as one having a backflow preventer in the cold water supply line, means shall be provided to control thermal expansion. Contact the water supplier or local plumbing inspector on how to control thermal expansion.

•Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.

•Combustion air must be free of chemicals, such as chlorine or bleach, that produce fumes. These fumes can damage components and reduce the life of your appliance.

•Where required by the authority having jurisdiction, the installation must comply with the Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1.

15

•Ensure the wall is of sufficient strength to support the weight of the boiler, piping and any other components needed for installation; if it is not, please reinforce the wall as appropriate.

•Operating limits of the boiler:

Maximum boiler set	185°F (85°C)
point temperature:
Maximum operating	45 psi (3.1 bar)
pressure:
Maximum allowable	210°F (99°C)
working
temperature ASME:
Maximum allowable	45 psi (3.1 bar)
working pressure
ASME:

DO NOT

DO NOT install the boiler in an area where water leakage of the unit or connections will result in damage to the area adjacent to the appliance or to lower floors of the structure. When such locations cannot be avoided, it is required that a suitable drain pan, adequately drained, be installed under the boiler. The pan must not restrict combustion air flow.

DO NOT install the boiler in an area with negative air pressure.

DO NOT obstruct the flow of combustion and ventilation air.

DO NOT use substitute parts that are not authorized for this boiler.

DO NOT install the boiler on carpeting.

16

Gather the recommended tools and parts before starting installation.

Items Needed

•Pressure relief valve for domestic hot water (150 PSI / 1,034 kPa)

•Low loss header or closely spaced tee

•Expansion tank for a closed heating system

•Isolation valve kit or equivalent components (for quick isolation of the boiler for service and/or maintenance)

•CH System Air Separator

•Standard tools for central heating, gas fitting, plumbing and electrical wiring.

•Combustion analyzer (intended for use with condensing boilers)

•Digital manometer capable of reading both positive and negative pressure

•Digital multimeter capable of reading microamps

•pH digital meter or test strips

•For wall mounting bracket installation:

−Level

−Screws (use appropriate screws for type of wall construction)

Other Items You May Need

•Hand truck with fastening belt

•Boiler toolkit (optional accessory for boiler service. See section “3.6 Accessories” for more information.)

Rinnai M-Series Condensing Boiler Combi Manual

Carefully unpack your boiler system and verify the following contents are included. If any items are damaged or missing, contact your local dealer/distributor. Do not attempt to use any item that appears damaged.

RINNAI CONDENSING BOILER

Vent top with integrated 3 in. PP (80 mm) Connections

Integrated

Items

	Pump	Refer to section
		“3.3 Components”
		for a complete list of
		integrated parts.

WALL MOUNTING		30 PSI PRESSURE		OUTDOOR	CENTRAL HEATING
BRACKET		RELIEF VALVE		TEMPERATURE SENSOR	TEMPERATURE
					PRESSURE GAUGE
		For Central
		Heating Systems

VENT ADAPTERS

3 in. PVC	2 in. PVC/PP
(QTY 2)	Reducer (QTY 2)

3/5 in. Concentric

LIQUID PROPANE FIELD CONVERSION KIT

This boiler is configured for Natural Gas only. Use this kit to convert to Propane Gas if needed. Contents include:

EEPROM KEY LIQUID PROPANE CONVERSION CONVERSION

RESTRICTOR RATING MANUAL PLATE

DOCUMENTATION

•	Installation and Operation	•	ISCL
	Manual (this manual)	•	Conversion Manual
•	User Manual

Rinnai M-Series Condensing Boiler Combi Manual

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When choosing an installation location, you must ensure that clearances will be met and that the vent length will be within required limits. Consider the installation environment, water quality, and need for freeze protection. Requirements for the gas line, water lines, electrical connection, and condensate disposal can be found in their respective installation sections in this manual.

This section provides information on the importance of water quality to the Rinnai Condensing Boiler. The information is intended to serve as general guidelines only and is not a complete list of water quality guidelines.

Consideration of care for your boiler should include evaluation of water quality.

•The water must be potable, free of corrosive chemicals, sand, dirt, or other contaminants.

•It is up to the installer to ensure the water does not contain corrosive chemicals or elements that can affect or damage the boiler.

•Water that contains chemicals exceeding the levels below can damage the boiler.

	Contaminant	Maximum Level
	Total Hardness	Up to 200 mg/L
	Aluminum *	Up to 0.2 mg/L
	Chlorides *	Up to 250 mg/L
	Copper *	Up to 1.0 mg/L
	Dissolved Carbon Dioxide	Up to 15.0 mg/L
	(CO2)
	Iron *	Up to 0.3 mg/L
	Manganese *	Up to 0.05 mg/L
	pH *	6.5 to 8.5
	TDS (Total Dissolved Solids)*	Up to 500 mg/L
	Zinc *	Up to 5 mg/L

* Source: Part 143 National Secondary

Drinking Water Regulations

•Unsuitable heating system water can cause the formation of scale or sludge, which affects system efficiency. It can also cause corrosion and reduce life of the heat exchanger.

•Never use water that has been treated by a reverse osmosis, deionized, or distilled water to soften the water to fill the heating system.

•For Domestic Hot Water systems, if you install the boiler in an area that is known to have hard water or that causes scale buildup, the water must be treated and may require a more frequent flushing schedule. Scale build-up is caused by hard water and can be accelerated if the boiler is set at a high temperature. Rinnai offers Southeastern Filtration’s “ScaleCutter Water Conditioning System” that offers superior lime scale prevention and corrosion control by feeding a blend of control compounds into the cold water supply.

•Oxygen permeable or rubber tubing is not permitted in the heating system unless it is separated from the boiler by a plate heat exchanger. The boiler warranty may be voided if connected directly to CH systems that include this tubing.

•Thoroughly flush the system prior to filling. While flushing, isolate the boiler.

•Do not introduce any system cleaner into the boiler. Flush the system thoroughly to remove all system cleaner before filling the boiler with water.

•When freeze protection of the heating system is desired, only use Rinnai-approved antifreezes. The allowed maximum concentration is 50%.

•Reference section “14.1 Approved Cleaners, Inhibitors and Antifreezes” in the Appendix for an approved list of system cleaners, inhibitors, and antifreezes.

IMPORTANT

Replacement of components due to water quality damage is not covered by the warranty.

18	Rinnai M-Series Condensing Boiler Combi Manual

Air surrounding the boiler, venting, and vent termination(s) is used for combustion and must be free of any compounds that cause corrosion of internal components. These include corrosive compounds that are found in aerosol sprays, detergents, bleaches, cleaning solvents, oil based paints/varnishes, and refrigerants. The air in beauty shops, dry cleaning stores, photo processing labs, and storage areas for pool supplies often contains these compounds. The boiler, venting, and vent termination(s) should not be installed in any areas where the air may contain these corrosive compounds.

Location	Clearance
Top	2 in. (51 mm)
	0 in. from vent components
Bottom (Ground)	12 in. (305 mm)
Front	6 in. (152 mm)
	Clearance for servicing is
	24 in. (610 mm) in front
	of boiler
Back	0 in.
Sides (Left and Right)	2 in. (51 mm)
Vent	0 in.

Right image is not to scale and is for illustration purposes only.

Top

Front

Side

Bottom

WALL

2 in. (51 mm) Minimum

2 in. (51 mm) Minimum

12 in. (305 mm) Minimum

Use this checklist to ensure you have selected the correct location for the boiler.

□The boiler is not exposed to corrosive compounds in the air.

□The boiler location complies with the required clearances.

□The planned combustion air and exhaust termination locations meet the required clearances.

□The water supply does not contain chemicals or exceed total hardness that will damage the heat exchanger.

□A standard 3 prong 120 VAC, 60 Hz properly grounded wall outlet or other 120 VAC, 60 Hz source is available.

□The installation must conform with local codes or, in the absence of local codes, with the

National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1.

Rinnai M-Series Condensing Boiler Combi Manual

19

You Will Need:

•Rinnai Condensing Boiler

•Wall Mounting Bracket

•Boiler Mounting Template

Supplied by Installer:

•Level

•Four screws for mounting bracket installation

•Screws for top and bottom bracket installation

Use appropriate screws for type of wall construction.

Instructions:

Hold the wall mounting bracket up against the wall and use a level to make sure the bracket is even. Proper operation requires the boiler to be level.

Level

Wall Mounting Bracket

Use the appropriate screws for the wall construction to secure the mounting bracket to the wall (use any of the screw holes in the mounting bracket).

Insert the top mounting lip of the boiler onto the wall mounting bracket. Make sure the wall mounting bracket is attached to the wall and can hold the weight of the boiler before you fully let go.

Boiler mounting template

Assembled view

20	Rinnai M-Series Condensing Boiler Combi Manual

5

Topics in this section

•Guidelines

•Venting Installation Sequence

•Termination Considerations

•Venting Options

•M-Series boilers can be installed in direct vent or non-direct vent applications.

•When installed as Direct Vent, refer to the following section for a complete list of approved vent manufacturers and products: “5.4.1 Direct Vent: Approved Vent Manufacturers and Products.”

•When installed as Non-Direct Vent (Room Air), the vent must be Category IV and of a type listed by a national recognized testing agency.

•Exhaust must be directly vented to the outside. Combustion air can be provided from outside (Direct Vent) or from room air (Non-Direct Vent).

•If using room air (non-direct vent) for combustion, ensure the required volume of indoor air is available according to the National Fuel Gas Code, ANSI Z223.1/NFPA 54.

•Avoid dips or sags in horizontal vent runs by installing supports per the vent manufacturer’s instructions.

•Support horizontal vent runs every 4 ft (1.2 m) and all vertical vent runs every 6 ft (1.83 m) or as per vent manufacturer’s instructions or local code requirements.

Rinnai M-Series Condensing Boiler Combi Manual

•Venting should be as direct as possible with a minimum number of pipe fittings.

•For manufactured vent systems, vent connections must be firmly pressed together so that the connections form an air tight seal. Follow the venting manufacturer’s instructions.

•Refer to the Schedule 40 PVC/CPVC manufacturer for appropriate fittings, solvents or joining methods.

•If venting reassembly is needed, follow the steps for installing the venting in the following sections. Make certain that the vent piping and seals are not damaged. Only use sealants, primers, or glues that are approved for the vent material in use.

•Refer to the instructions of the vent system manufacturer for component assembly instructions.

•If the vent system is to be enclosed, it is suggested that the design of the enclosure shall permit inspection of the vent system. The design of such enclosure shall be deemed acceptable by the installer or the local inspector.

•Any issues resulting from improper vent installation will not be covered by warranty.

WARNING

•DO NOT use cellular core PVC/CPVC.

•DO NOT use Radel, ABS, or galvanized material to vent this appliance.

•DO NOT cover non-metallic vent pipe and fittings with thermal insulation.

•DO NOT combine vent components from different manufacturers.

•DO NOT reduce the vent diameter. Vent diameter cannot be less than 2 in.

•DO NOT connect the venting system with an existing vent or chimney.

•DO NOT common vent with the vent pipe of any other manufacturer’s boiler or appliance.

21

1.Determine the termination method— horizontal or vertical, concentric, or twin pipes, etc.

2.Determine proper location for wall or roof penetration for each termination.

3.Install termination assembly as described in this manual or in the vent manufacturer’s installation instructions.

4.Install air and vent piping from boiler to termination.

5.Slope horizontal exhaust run towards the boiler 1/4 in. per foot. DO NOT slope combustion air pipe towards boiler.

6.Install vent supports and brackets allowing for movement from expansion, or as per vent manufacturer’s instructions or local code requirements.

7.(Optional step) Install vent screen or room air filter (not included with purchase) on Schedule 40 PVC combustion air and exhaust termination elbows as illustrated below.

Vent Screen

Room Air Filter

•Press vent screen inside of termination piece/ elbow.

•Secure vent screen to the elbow with screw.

Press air filter into the 3 in. (80 mm) PP intake air fitting on the boiler.

Check to determine whether local codes supersede the following clearances:

•Avoid termination locations near a dryer vent.

•Avoid termination locations near commercial cooking exhaust.

•Avoid termination locations near any air inlets.

•You must install a vent termination at least 12 in above the ground or anticipated snow level.

The vent for this appliance shall not terminate:

•Over public walkways.

•Near soffit vents or crawl space vents or other area where condensate or vapor could create a nuisance or hazard or cause property damage.

•Where condensate or vapor could cause damage or could be detrimental to the operation of regulators pressure relief valves, or other equipment.

Listed below are important considerations for locating vent termination under a soffit (ventilated or unventilated or eave vent; or to a deck or porch):

•Do not install vent termination under a soffit vent such that exhaust can enter the soffit vent.

•Install vent termination such that exhaust and rising moisture will not collect under eaves. Discoloration to the exterior of the building could occur if installed too close.

•Do not install the vent termination too close under the soffit where it could present recirculation of exhaust gases back into the combustion air intake of the termination.

Horizontal portions of the venting system shall be supported to prevent sagging:

•For category IV boilers, have horizontal runs sloping upwards not less than 1/4 in. per foot (21 mm/m) from the boiler to the vent terminal;

•For category IV boilers, be installed so as to prevent accumulation of condensate; and

•For category IV boilers, where necessary, have means provided for drainage of condensate.

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Two venting options are available: Direct Vent and Non-Direct Vent (Room Air).

Option 1	Direct Vent (Concentric and Twin Pipe)	See Direct Vent section for complete details.
	Concentric Pipe	Twin Pipe

Combustion air and exhaust vent directly through a single concentric connection. Hot exhaust exits through the interior tube, while combustion air enters through the outer layer.

	Exhaust
Combustion	Combustion
air	air

Combustion air and exhaust vent directly through separate penetrations.

Exhaust

Combustion

air

Option 2	Room Air	See Room Air section for complete details.
Exhaust		Exhaust

Combustion	Combustion air
air
	Room air filter
	(accessory)

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23

Following is a list of vent components and terminations for Direct Vent installations (concentric and twin pipe). Install the correct venting for your model according to the venting manufacturer’s instructions and the guidelines below. The information below is correct at time of publication and is subject to change without notice. Contact the vent manufacturer for questions related to the vent system, products, part numbers and instructions.

Manufacturer	Phone	Web Site
Ubbink	800-621-9419	www.rinnai.us
Centrotherm	877-434-3432	www.centrotherm.us.com
Heat-Fab	800-772-0739	www.heatfab.com
Metal Fab	800-835-2830	www.metal-fabinc.com
IPEX	U.S.: 800-463-9572	www.ipexamerica.com, www.ipexinc.com
	Canada: 866-473-9462
DuraVent	800-835-4429	www.duravent.com
Royal	800-232-5690	www.royalbuildingproducts.com
ECCO Manufacturing	877-955-4805	www.eccomfg.com
DiversiTech	800-995-2222	www.diversitech.com
Z-FLEX	603-669-5136	www.z-flex.com

2 in./4 in. CONCENTRIC VENT TERMINATIONS

Manufacturer	Manufacturer Part Number	Product Description	Diagram	Horizontal	Vertical	Equivalent Length (ft)
		2 in./4 in. CONCENTRIC VENT TERMINATIONS
	229011NPP	2/4 Condensing Horizontal Termination Kit 8.7 in.
	229012NPP	2/4 Condensing Horizontal Termination Kit 12 in.				5
	229013NPP	2/4 Condensing Horizontal Termination Kit 21 in.
UBBINK	224356NPP	2/4 Condensing Roof Discharge Termination
		20 in. above roof				5
	710202NPP	2/4 Condensing 90 Degree Diverter Nose				5
		(Use with Wall Terminal)
	710215NPP	2/4 Condensing 45 Degree Diverter Nose				5
		(Use with Wall Terminal)
	196005,	FGV Concentric Vent Kit (16 in. length)				20
	197040
IPEX
	196105,	FGV Concentric Vent Kit (28 in. length)				20
	197033
	196125	FGV Concentric Vent Kit (40 in. length)				20
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Manufacturer	Manufacturer	Part Number	Product	Description	Diagram	Horizontal	Vertical	Equivalent Length	(ft)

2 in./4 in. CONCENTRIC VENT TERMINATIONS (Continued)

52CVKGVS6502	PVC Concentric Vent Kit	20
	2 in. x 16 in.

	ROYAL
		52CVKGVS6502-28	PVC Concentric Vent Kit	20
			2 in. x 28 in.
		52CVKGVS6502-40	PVC Concentric Vent Kit	20
			2 in. x 40 in.
	CENTROTHERM	ICRT2439	2 in. x 4 in. Concentric Roof
			Termination
				20
		2PPS-VKL/VK-TCL	2 in. x 4 in. Vertical
	DURAVENT		Termination Cap	20
			Kit-Concentric
		2PPS-HKL	2 in. x 4 in. Horizontal	20
			Termination Kit-Concentric
		190288	2 in. x 4 in. Concentric	5
			Horizontal Termination
	ECCO
		190295	2 in. x 4 in. Concentric
			Vertical Termination
				5
	DIVERSITECH	CVENT-2	2 in. x 4 in. Concentric
			Horizontal Termination
				20
		2ZDCTH24	2 in. x 4 in. Concentric	5
			Horizontal Termination
	FLEX-Z	2ZDCTV24	2 in. x 4 in. Concentric Roof
			Termination
				5
	Rinnai M-Series Condensing Boiler Combi Manual			25

3 in./5 in. CONCENTRIC VENT TERMINATIONS

Manufacturer	Manufacturer Part Number	Product Description	Diagram	Horizontal	Vertical	Equivalent Length (ft)
	3 in./5 in. CONCENTRIC VENT TERMINATIONS
	223174PP	3/5 Condensing Horizontal
	223176PP	Termination Kit 8.7 in.
	223177PP	3/5 Condensing Horizontal				5
		Termination Kit 12 in.
		3/5 Condensing Horizontal
		Termination Kit 21 in.
UBBINK
	223186PP	3/5 Condensing Horizontal Diverter				16
		Termination Kit 19 in.
	224047PP	3/5 Condensing Raised Horizontal
		Termination Kit				24
	184162PP	3/5 Condensing Roof Discharge
		Termination 20 in. above roof
						5
	196006, 197009	FGV Concentric Vent Kit 3 in. x 20				20
		in.
IPEX	196106, 197107	FGV Concentric Vent Kit 3 in. x 32				20
		in.
	196116, 197117	FGV Concentric Vent Kit 3 in. x 44				20
		in.
	52CVKGVS6503 (PVC)/	PVC/CPVC Concentric Vent Kit 3 in.				20
	52CVKGVSF9003 (CPVC)	x 20 in.
ROYAL	52CVKGVS6503-32	PVC/CPVC Concentric Vent Kit 3 in.
	(PVC)/ 52CVKGVSF9003-	x 32 in.				20
	32 (CPVC)
	52CVKGVS6503-44	PVC/CPVC Concentric Vent Kit 3 in.
	(PVC)/ 52CVKGVSF9003-	x 44 in.				20
	44 (CPVC)
FAB	SC03HT	Horizontal Termination Adapter				20
HEAT-
	SC03VT	Vertical Termination Adapter				20
CENTROTHERM	ICRT3539	3 in./5 in. Concentric Roof
		Termination PPs-UV
						20

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Manufacturer	Manufacturer Part Number	Product Description	Diagram	Horizontal	Vertical		Equivalent Length (ft)
	3 in./5 in. CONCENTRIC VENT TERMINATIONS (Continued)
	3CGRLSV	Vertical Adapter					1
FAB-	3CGRLSH	Horizontal Adapter					6
METAL
	3CGRVT	Vertical Termination					5
	3CGRHT	Horizontal Termination					16
	3PPS-VKL/VK-TCL	3 in. x 5 in. Vertical Termination Cap
DURAVENT		Kit-Concentric
							20
	3PPS-HKL	3 in. x 5 in. Horizontal Termination					20
		Kit-Concentric
	190388	3 in. x 5 in. Concentric
		Horizontal Termination					5
ECCO
	190395	3 in. x 5 in. Concentric Vertical
		Termination
							5
DIVERSITECH	CVENT-3	3 in. x 5 in. Concentric
		Horizontal Termination					20
	2ZDCTH35	3 in. x 5 in. Concentric
		Horizontal Termination					5
FLEX-Z	2ZDCTV35	3 in. x 5 in. Concentric Roof
		Termination
							5
Rinnai M-Series Condensing Boiler Combi Manual						27

2 in. TWIN PIPE TERMINATIONS

Manufacturer	Manufacturer	Part Number	Product	Description	Diagram	Horizontal	Vertical	Equivalent Length (ft)

2 in. TWIN PIPE TERMINATIONS

CENTROTHERM	ISELL0287UV	Termination				5
		2 in. 87° Long PPS-UV				6
	ISTT0220	2 in. Termination Tee				6
	ISLPT0202	2 in. Low Profile Wall
	2PPS-HTPL	2 in. Twin Pipe Termination				10
DURAVENT
	2PPS-HSTL	2 in. Single Horizontal				6
		Termination
	2PPS-TBL	2 in. Black UV Resistant Tee				5
	196984	FGV PVC Low Profile
		Termination Kit				5
IPEX
		Kit
	081216	FGV PVC Wall Termination
						16
	52SWVKGVS6502	PVC Side Wall Vent Kits
						5
ROYAL
	52WTVKGVS6502	PVC Wall Vent Kits
						16
DIVERSITECH	HVENT-2	2 in. Low Profile Horizontal
		Vent Kit
						5

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3 in. TWIN PIPE TERMINATIONS

Manufacturer	Manufacturer Part Number	Product Description	Diagram	Horizontal	Vertical	Equivalent Length (ft)
		3 in. TWIN PIPE TERMINATIONS
CENTROTHERM	ISELL0387UV	3 in. 87° Long PPS-UV				6
	ISTT0320	3 in. Termination Tee				6
	ISLPT0303	3 in. Low Profile Wall				5
		Termination
	3PPS-HTPL	3 in. Twin Pipe Termination				10
DURAVENT
	3PPS-HSTL	3 in. Single Horizontal				5
		Termination
	3PPS-TBL	3 in. Black UV Resistant Tee				6
	196985	FGV PVC Low Profile				5
		Termination Kit
IPEX
	081219	FGV PVC Wall
		Termination Kit				16
	52SWVKGVS6503	PVC Side Wall Vent Kits				5
ROYAL
	52WTVKGVS6503	PVC Wall Vent Kits
						16
DIVERSITECH	HVENT-3	3 in. Low Profile Horizontal
		Vent Kit
						5

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VARIOUS 2 in. OR 3 in. SCHEDULE 40 PVC/CPVC TERMINATIONS

Product		Description		Diagram		Horizontal		Vertical		Equivalent Length (ft)
Air Filter Screen										N/A
Tee										5
90° Elbow										5
45° Elbow										2.5
		Approved PVC/CPVC Vent and Air Piping Material
Item		Material		Standard for Installation in North America
			United States			Canada
		Thermoplastic Piping Materials
Vent or Combustion		PVC Schedule 40	ANSI/ASTM D1785		Thermoplastic vent pipe must
Air Intake Pipe and		PVC-DWV	ANSI/ASTM D2665
					be certified to ULC S636.
Fittings		CPVC Schedule 40	ANSI/ASTM F441
					Intake pipe may be of the
PVC Pipe Cement		PVC	ANSI/ASTM D2564
					materials listed in this table.
and Primer		CPVC Schedule 40	ANSI/ASTM F493
		PVC Vent Screens
			• 2 in. Vent Screens (included in carton box) (IPEX
Termination Vent		Polyethylene	Part Number: 196050)
Screens			• 3 in. Vent Screens (IPEX Part Number: 196051)

Exhaust piping must be of solid core material. Refer to the PVC/CPVC manufacturer for appropriate fittings, solvents or joining methods.

APPROVED VENTING MATERIALS BY MANUFACTURER

Manufacturer	Vent Material
Ubbink	PVC (Outer Vent), Polypropylene (Inner Vent)
Centrotherm	Polypropylene
Heat-Fab	Metal
Metal Fab	Metal
IPEX	PVC/CPVC
DuraVent	Polypropylene
Royal	PVC
ECCO Manufacturing	Polypropylene
DiversiTech	PVC/CPVC
Z-FLEX	Polypropylene
30	Rinnai M-Series Condensing Boiler Combi Manual