Rinnai 2424WC User Manual

How to use your New Continuous Flow Commercial Water Heater

Model 2424WC

(outdoor unit)

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.

S P E C I F I C A T I O N S

Type of appliance	Temperature controlled continuous flow gas hot water system
Operation	With or without remote controls
Exhaust system	Direct Vent - Forced combustion
Rinnai model number	REU-2424WC-US
Maximum/Minimum gas rate (Input BTU's)	180,000 BTU's - 19,000 BTU's
Hot water capacity (50°F rise)	0.6 to 6.5 GPM
Setpoint Temperatures (without remote)	Factory setting - 140°F
Temperature ranges (with remote)	MCC controller :	96 - 140° or 140 - 180°F
Approved gas type	Natural or Propane - Ensure unit matches gas type it's being installed on.
Installation	Outdoor Only
	Height	23 3/4"
Dimensions	Width	13 3/4"
	Depth	6 3/4"
Weight	44 Lbs.
Efficiency rating	82%
Noise level	49 dB (A)
	Gas supply		3/4" MNPT
Connections	Cold water inlet		3/4" MNPT
	Hot water outlet		3/4" MNPT
Ignition system	Direct electronic ignition
	Normal		55 watts
Electrical consumption	Standby		8 watts
	Anti-frost protection		90 watts
Water temperature control	Simulation feedforward and feedback.
Water flow control	Water flow sensor and automatic electro-mechanical water flow control device
Minimum water supply pressure	40 PSI (Rinnai recommends 60-80 PSI for maximum performance)
Maximum water supply pressure	150 PSI

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S P E C I F I C A T I O N S

	Appliance - AC 120 Volts - 60Hz.
	Remote control DC 12 Volts (Digital)
	Flame failure - Flame rod
	Boiling protection - 203°F
	Remaining flame (OHS) 194°F bi-metal switch
Safety devices	Thermal fuse 279°F
	Automatic frost protection - Bi metal sensor & anti-frost heaters
	Combustion fan rpm check - Integrated circuit
	Over current - Glass fuse (3 amp)
	If remote fails or becomes disconnected unit defaults to 100°F with water
	flowing, this is an anti-scald feature.
Remote control	MCC-45-3 US		Main control
Remote control cable	Non-polarized two core cable
	Top of heater		12"
	Front of heater		24"
Clearances from combustibles	Sides of heater		6"
	Back of heater		0"
	Ground		12"
	Below eaves, porches, overhangs = 36"
Minimum and Maximum gas supply pressure	Natural Gas : *Minimum 6" W. C.			Propane Gas: *Minimum 10" W. C.
	(NAT.)	**Maximum 10.5" W. C.		(LPG)	**Maximum 14" W. C.
Manifold Gas Pressure	Natural Gas		5.3" W. C. high fire		0.43" W. C. low fire
	LPG:		8.7" W. C. high fire		0.59" W. C. low fire
Warranty	Five years heat exchanger / five years parts (see unit's warranty for details)

*Minimum input pressure is for the purpose of input adjustments. **Do not exceed maximum pressure.

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800-621-9419

W A R R A N T Y

Rinnai warrants the continuous Commercial Water Heater Model 2424WC, including any parts and components thereof, to be free from any defects in materials and workmanship for the period specified below, subject to the terms specified in this warranty. This warranty gives you specific legal rights and you may also have other rights which vary from state to state.

This Warranty shall apply to the Continuum Continuous Water Heater as follows:

CONDITION AND EXCEPTIONS

Item	Type of Failure Covered	Period of Coverage
Heat Exchanger	Defective Materials or	5	Years from Date of
	Workmanship		Purchase
All other parts	Defective Materials or	5	Years from Date of
and components	Workmanship		Purchase

In the event of a malfunction, operational difficulty or failure of the product, or any part or any component thereof, during the warranty term, resulting from defects in materials or workmanship, Rinnai will remedy the malfunction, operational difficulty, or failure without charge to the owner of the water heater. The remedy will consist of repair or replacement of the product at the option of Rinnai.

Rinnai will only provide those remedies listed above. The owner shall be responsible for all other costs, including but not limited to shipping and delivery charges, labor associated with the removal and reinstallation of the product or its components, and any other incidental costs such as other materials or permits that may be required for installation.

This warranty DOES NOT cover any failures, operational difficulty or malfunction due to accident, abuse, misuse, alteration, Acts of God, misapplications, improper installation or improper maintenance or service, lime damage, or from any other cause other than defects in materials or workmanship. Warranty does not cover use as a pool or spa heater.

PROCEDURE FOR MAKING A CLAIM

In order to obtain the benefits of the warranty, contact your selling dealer or Rinnai at 800-621-9419 for the location of the servicing dealer nearest you.

Proof of Purchase is required to institute a claim under this warranty. This document does not constitute proof-of purchase.

LIMITATION ON IMPLIED WARRANTIES

Any implied warranties of merchantability and fitness applicable to the equipment arising under state law are limited in duration to the period of coverage provided by this limited warranty, unless the period provided by state law is less. Some States do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

DISCLAIMERS

Rinnai is not liable for any special, indirect or consequential damages, such as water damage, loss of use, inconvenience, damage to person or property, whether arising in contract or tort.

Rinnai does not authorize any person or company to assume for it any other obligation or liability in connection with the sale, application, engineering, installation, use, removal, return or replacement of its product, and no such representations are binding on Rinnai.

Please DETACH the enclosed warranty registration card, fill it out, and drop it in the mail. Receipt of this completed card by Rinnai will constitute proof-of purchase for your Rinnai Continuum 2424WC.

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C	O	N	T	E	N	T	S
Specifications..............................................................							2,3
Warranty	........................................................................						4
Owner's Installation Information ...................................							6
Features of your new Continuum ................................							7
Safety Issues ..............................................................							8,9
Basic Operation...........................................................							10
About Hot Water .........................................................							11
Scalds-First Aid ...........................................................							11
Remote Control Operation				.........................................			12
Error Messages ...........................................................							13
Maintenance & Service Information......................							14,15
Trouble Shooting and Common Questions ...............							16
Operating Instructions............................................							17,18
Care & Lime Condition Warning ................................							18
Model 2424WC				5			800-621-9419

O W N E R ’ S I N S TA L L AT I O N I N F O R M AT I O N

This product must be installed by a Rinnai certified installer. Failure to have the product installed by a Rinnai certified installer may result in a voiding of the product’s warranty.

This appliance must be installed in accordance with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1 and/or the CAN/CGA-B149, Installation Codes.

Install this product outdoors, DO NOT install indoors.

Do Not use this appliance if any part has been underwater. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been underwater.

Detailed instructions on the proper installation practices to follow for the installation of your new continuous hot water heater are included at the back of this manual.

For the Rinnai Certified Installer nearest you call:

1-800-621-9419.

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Model 2424WC

F E A T U R E S O F Y O U R N E W C O N T I N U U M

)The Continuum 2424WC is one of the most advanced water heaters available. It supplies hot water continuously at the temperature preset in the unit or at the temperature set on the optional remote control. The remote control is recommended for optimum performance.

)The Continuum 2424WC never runs out of hot water. While electricity, water and gas supplies are connected, hot water is available whenever the hot tap is open.

)The gas burner lights automatically when the hot water tap is opened, and goes out when the tap is closed. Ignition is electronic, there is no pilot light. When the hot water tap is off, no gas is used. You save energy and money with the Continuum 2424WC.

)The temperature of the outgoing hot water is constantly monitored by a built in sensor. If the temperature of the outgoing water rises to more than 6 degrees above the selected temperature (shown on the optional digital remote control) the gas burner will automatically go out. The gas burner will re-ignite once the outgoing hot water temperature falls below the selected temperature.

)Built into the microprocessor of the Continuum 2424WC is the ability to LIMIT THE MAXIMUM TEMPERATURE of the hot water supplied by the Continuum 2424WC. Without the connection of the optional remote control, the Continuum 2424WC is preset to deliver 120 degree water.

)With the optional remote the water temperature is adjustable from 140°F to 180°F. The water temperature can be preset at 108, 120, 130, 140, 150, 160, 170 or 180 by a certified Rinnai technician. If you require a temperature other than 120 or what the remote will give you, please contact your Rinnai certified technician.

)Error messages are displayed on the optional remote control, simplifying service calls.

)The Continuum 2424WC incorporates a device to prevent the temperature from varying when the water is off, then on again. It also incorporates a rapid response device for fast heating.

)The sound (noise) level from the Continuum 2424WC is very low.

)Thewall Continuumspace. 2424WC is a very compact direct vent device. It saves valuable floor and

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S A F E T Y I S S U E S

Always check water temperature by hand before entering a shower or bath. The temperature may have been changed.

Do not clean Remote Control with solvents. Use a soft damp cloth.

The water temperature can not be adjusted when a hot water tap is open or when hot water is flowing through the water heater.

Do not touch the cover or insert objects into the flue outlet of the Continuum

2424WC.

On cold days steam may be discharged from the flue outlet, this is normal with a high efficiency appliance and does not indicate a fault.

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Model 2424WC

S A F E T Y I S S U E S

If the external Continuum 2424WC is disconnected from the power supply and freezing conditions are expected, turn off water and gas, and drain all water from the appliance.

Water Off

Gas Off

DRAIN

Drain Water

FILTER

WATER

GAS

If power and the automatic frost protection are connected, freezing will be prevented in conditions

as cold as -30°F.

Keep flammable materials, trees, shrubs etc. away from the Continuum 2424WC.

Do not spray water directly into the flue terminal.

Depending on the weather conditions and the length of the pipe between the Continuum

2424WC and the tap in use, there may be a variation between the temperatures displayed at the Remote Control and the temperature of the water at the tap.

140

142°F

The Continuum 2424WCcontrols the water temperature automatically. To do this it sometimes needs to change the water flow accordingly. The water flow from the hot water tap may vary after the selected temperature at the Remote Control is altered. The water flow may also vary from summer to winter, as incoming water temperatures differ.

Summer
60°F				Winter
Incoming
Water				40°F
			Incoming
				Water

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B A S I C O P E R A T I O N

1 Adjusting Temperature

The setpoint temperature of the Continuum 2424WC can only be adjusted by the user using the Remote Control. To adjust the setpoint temperature of the

Continuum 2424WC, all hot water taps must be closed, and all circulating pumps turned off.

TEMPERATURE CANNOT BE

ADJUSTED WHEN ANY HOT

WATER TAP IS OPEN, OR

WATER IS FLOWING THROUGH

THE WATER HEATER.

Simply press the or button until the required temperature is displayed on the Digital Monitor.

2

To operate the Continuum 2424WC simply turn any hot water tap on, or initiate water flow through the unit with a circulating pump. This will automatically light the burner providing hot water at the preset temperature. If the optional remote control has been installed, the green IN USE indicator will glow on the remote control.

140°F

The Remote Control will display the water heaters current setpoint temperature.

CHECK LOCAL CODES FOR THE MAXIMUM WATER TEMPERATURE SETTING ALLOWED WHEN USED IN NURSING HOMES, SCHOOLS, DAY CARE CENTERS, AND ALL OTHER PUBLIC USE APPLICATIONS.

Rinnai recommends fixing the water heater setpoint temperature at 108°F for ALL public use applications.

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A B O U T H O T W A T E R

Hot Water Is Dangerous, especially for the young and the elderly or the infirm. The Continuum 2424WC allows you to precisely control the temperature of your hot water, ensuring safe hot water temperatures.

Water Temperatures over 125°F can cause severe burns instantly or death from scalds.

Hot Water can cause first degree burns with exposure for as little as:

3 seconds at 140 °F

20 seconds at 130 °F

8 minutes at 120 °F

Test the temperature of the water with your elbow before placing a child in the bath or shower.

BURN Do not leave a child or an infirm person in the bath unsupervised.

S c a l d s	-	F i r s t	A i d

1)Remove clothing; Remove all wet clothing, quickly. Wet clothing retains the heat.

2)Apply cold water for 30 minutes; Immediately submerge the burnt area in cold water for 30 minutes to reduce the heat in the skin, preventing deeper burning.

Never use butter, oils or ointment to cover the burn. They may retain the heat.

3)Keep the scalded person warm; Place a blanket around the person.

4)Seek Medical Advice; Call your medical advice hotline and describe the scald, follow their directions.

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R E M O T E C O N T R O L O P E R A T I O N

Digital Monitor

Indicates the selected water temperature. Error messages flash in the event of a failure.

°F

Set Temperature

In Use Indicator

Indicates that a hot water tap is open. (The setpoint temperature cannot be adjusted when indicator is illuminated.)

Maintenance

M

In Use

Maintenance Button

Pressing repeatedly shows sequence of error codes water heater has experienced.

C

Main Controller	H
MCC - 45 - 3US

endless hot water system

CAUTION: Hotter water increases the risk of scald injury. Before changing temperature setting, see instruction manual

Thermostat

Increase or decrease the desired water temperature.

When the Main Controller MCC-45-3US is used in public use applications, it should be installed where it can not be adjusted by the public (i.e. a maintenance room or manager’s office.

DIAGNOSTIC USE OF REMOTE CONTROL

1.To Display Error Codes -- Press Maintenance Button, “M”. To sequence throuh stored error codes, press “M” followed by the “H” thermostat button.

2.To Display Water Flow through water heater -- Press “H” thermostat button, hold for 2 seconds and simultaneously press “M” button.

3.To Display Outlet Water Temperature -- Press “C” thermostat button, hold for 2 seconds and simultaneously press “M” button.

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Model 2424WC

E R R O R M E S S A G E S

The Continuum 2424WC has the ability to check its own operation continuously. If a fault occurs, an Error Message will flash on the Digital Monitor of the Remote Controls. This assists with diagnosing the fault, and may enable you to overcome a problem without a service call.

Please quote the code displayed when inquiring about service.

NOTE: Failure to remedy faults may result in severe burns, scalds, and/or death.

Code	Fault	Remedy
Displayed

10

11

12

14

16

31

32

52

61

71

72 LC

Air Supply or Exhaust Blockage

No Ignition

Flame Failure

Earthing Failure

Check that nothing is blocking the air intake or exhaust.

Check that the gas is turned on at the water heater, gas meter or cylinder.

Check that the gas is turned on at the water heater and gas meter. Check for obstructions in flue outlet.

Remaining Flame Safety Device	Service Call
Over Temperature Warning	Service Call
Heat Exchanger Incoming Water	Service Call
Temperature Sensor Faulty
Outgoing Water Temperature Sensor Faulty	Service Call
Mod. Solenoid Valve Answer Abnormal	Service Call
Combustion Fan Failure	Service Call
Solenoid Valve Driving Circuit Faulty	Service Call
Flame Sensing Device Faulty	Service Call
Scale build-up in Heat Exchanger	Service Call

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M A I N T E N A N C E & S E R V I C E I N F O R M AT I O N

Warning: Always turn off the electrical power supply, the manual gas valve and the manual water control valve whenever servicing the unit.

The Continuum 2424WC should be checked by a Rinnai Certified Technician once a year. A Rinnai Certified Technician should perform any repairs that may be necessary.

The following items should be checked each inspection:

1)The area around the Continuum 2424WC unit should be free from combustible materials such as cloth, vegetation and building materials. (see page 9)

2)Check burners for presence of foreign debris.

3)Remove and clean the inlet water filter.

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

5)Do not obstruct flow of combustion and ventilation air.

In the case of any fault or error message from the Continuum 2424WC, first turn all hot water taps off. Wait for 5 seconds. Turn the hot water tap back on. If this does not correct the fault or eliminate the error message from the remote control, press the priority button on and off twice to reset the system. If the error message still remains, call your Rinnai Authorized Service Representative or Rinnai at 800-621-9419.

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

DO NOT ATTEMPT TO SERVICE YOUR Continuum 2424WC YOURSELF.

Call a Rinnai Authorized Service Technician or call Rinnai at 800-621-9419.

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M A I N T E N A N C E & S E R V I C E I N F O R M AT I O N

MAINTENANCE SUGGESTIONS

This water heater has been designed and constructed for a long performance life when installed and operated properly under normal conditions. Regular inspections, as outlined in this section, are strongly recommended as a means of keeping your heater operating efficiently.

1. Cleaning

The water heater must be cleaned annually. Keep the water heater clear of dust and debris especially in and around burner.

Cleaning procedures for the Continuum are as follows:

1)Turn off and disconnect electrical power. Allow to cool for one hour.

2)Remove the Front Panel by removing screws.

See parts breakdown on panels.

3)Use pressurized air to remove dust from around main burner.

4)Use soft dry cloth to wipe cabinet.

DO NOT DAMAGE OR DISTORT ANY

PARTS OF HEATER.

DO NOT USE WET CLOTH OR

SPRAY CLEANERS ON BURNER.

2. Visual check of main burner flames.

The burner must flame evenly over the entire surface when operating correctly. The flame must burn with a clear, blue, stable flame. See the parts breakdown of the burner for the location of view ports. Any and all parts removed for inspection or service must be replaced before operating the unit. The flame pattern should be as shown in the following Figures.

*VENT MAINTENANCE

*VENT SYSTEM

Must be checked annually for blockage or deterioration.

* MAINTENANCE-

ELECTRIC MOTORS

Motors are permanently lubricated and need no lubrication. Keep fan and motor free of dust and dirt, clean annually.

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