Rinnai R50LSI, R75LSI, R94LSI, R98LSI, R98LSI-ASME User Manual

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Direct Vent Tankless Water Heater

Operation and Installation Manual

R50LSi ...............

REU-VA2019FFUD

R75LSi ...............

REU-VA2528FFUD(A)

R94LSi ...............

REU-VA2535FFUD

R98LSi ...............

REU-VA3237FFU

R98LSi-ASME....

REU-VA3237FFU-ASME

FOR INDOOR APPLICATIONS ONLY

Table of Contents ....................

2

Consumer Safety Information ..

4

Operating Instructions..............

5

Maintenance ............................

12

Error Codes .............................

13

Installation Instructions ............

17

Consumer Support...................

42

ANS Z21.10.3

CSA 4.3

INSTALLER: Leave this manual with the appliance. CONSUMER: Retain this manual for future reference.

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.

R

REU-VA3237FFU-ASME This model has been built in accordance with the requirements of the ASME Boiler and

Pressure Vessel Code and has received the Certificate of Authorization from the National Board. The heat exchanger on this unit has the NB and HLW stamps.

Table of Contents

Specifications ......................................................

 

3

Installation Instructions

17

 

 

 

Consumer Safety Information

 

 

General Instructions .......................................

17

Safety Definitions .............................................

 

4

Clearances from Appliance ............................

18

Safety Behaviors and Practices .......................

 

4

Attachment of the Water Heater.....................

18

Safety Features ................................................

 

4

Electrical Connection .....................................

19

 

 

 

Gas Piping

 

Description of Operation ....................................

 

5

General Instructions.................................

19

Operating Instructions

 

 

Pipe Sizing Procedure - Example ............

20

 

 

Water Piping

 

Features Available on Temperature

 

5

General Instructions.................................

21

Controllers ........................................................

 

Pressure Relief Valve ..............................

21

Temperature Controllers - Models ...............

 

6, 7

Freeze Protection.....................................

21

Setting the Temperature...................................

 

8

Freeze Protection Piping ................................

22

Temperature Options Without

 

8

Recommended Piping for Basic Installation 23..

a Temperature Controller .................................

 

Recommended Piping for

 

Temperature Ranges .......................................

 

9

Circulation Systems .......................................

24

Setting the Sound Volume................................

 

9

Optional Piping for Circulation Systems.........

25

Setting the Clock ..............................................

 

9

Venting Instructions

 

Using the Water Smart Bath Fill Function

......10

Intake / Exhaust Guidelines .....................

26

Overview....................................................

 

10

Condensate..............................................

26

Setting the Water Volume..........................

 

10

Maximum Vent Length .............................

27

Filling the Tub ............................................

 

11

Vent Products ..........................................

28

Setting Controller to Mute...............................

 

11

Flue Terminal Clearances

 

Maintenance

 

 

(ANS Z21.10.3 ● CSA 4.3).............................

29

Cleaning.....................................................

 

12

Additional Clearances ....................................

30

Vent System...............................................

 

12

Flue Installation - Concentric Venting

 

Motors ........................................................

 

12

(R50LSi, R75LSi, R85LSi)..............................

31

Temperature Controller..............................

 

12

Flue Installation

 

Lime / Scale Buildup ..................................

 

12

(R98LSi, R98LSi-ASME) ..........................

32, 33

Snow Accumulation ...................................

 

12

High Altitude Installation.................................

34

Visual Inspection of Flame.........................

 

12

Connecting Multiple Water Heaters................

34

Error Codes

 

 

Temperature Controller Installation

 

 

13,14

Location....................................................

35

Error Code Table.......................................

 

Configurations ..........................................

35

Trouble Shooting for Common Issues............

 

15

Cable Lengths and Size ...........................

35

Accessing Operating Information ...................

 

15

Mounting the Controller............................

36

Water Quality..................................................

 

15

Operating Instructions ....................................

37

Flushing the Heat Exchanger.........................

 

16

 

 

(Error Code: LC or 00)

 

 

Technical Data

38

 

 

 

Pressure Drop Curve .....................................

 

 

 

Outlet Flow Data.............................................

38

 

 

 

Space Heating ................................................

39

 

 

 

Dimensions.....................................................

40

 

 

 

Ladder Diagram..............................................

41

 

 

 

Consumer Support

42

 

 

 

Warranty Information......................................

 

 

 

Limited Warranty ......................................

42, 43

 

 

 

2

VA Series Indoor LS Manual

 

Specifications

Model

 

R50LSi

R75LSi

R94LSi

R98LSi

 

R98LSi-

 

 

 

ASME

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minimum Gas Consumption Btu/h

 

15,000

 

 

19,000

 

Maximum Gas Consumption Btu/h

150,000

180,000

199,000 Natural

 

237,000

 

Gas

 

 

 

 

 

 

 

190,000 Propane

 

 

 

 

Hot water capacity (Min - Max) *

0.6 - 5.0 GPM

0.6 - 7.5 GPM

0.6 - 9.4 GPM

0.6 - 9.8 GPM

(2.3 - 18.9 L/min)

(2.3 - 28.4 L/min)

(2.3 - 35.5 L/min)

(2.3 - 37 L/min)

 

 

 

 

 

 

 

 

 

 

 

 

Hot water capacity (45°F rise)

5.0 GPM

6.7 GPM

7.1 GPM

8.5 GPM

 

(18.9 L/min)

(25.4 L/min)

(27.0 L/min)

(32.2 L/min)

 

 

 

 

 

 

 

 

 

 

 

 

Default Temperature Setting (no controller)

 

 

120º F (49º C)

 

 

 

 

Temperature Controller Default Setting

 

 

104º F (40º C)

 

 

 

 

 

 

 

 

 

 

 

 

Maximum Temp Setting (commercial **)

160º F (71º C)

 

185º F (85º C)

 

Maximum Temp Setting (residential)

 

 

140º F (60º C)

 

 

 

 

see Temperature Ranges for more information

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minimum Temperature Setting

 

 

98º F (37º C)

 

 

 

 

Weight

 

 

50 lb (23 kg)

 

55 lb (25 kg)

 

 

 

 

 

 

 

 

 

 

Efficiency Rating

 

 

 

84.0%

 

 

 

 

Noise level

 

 

 

49 dB

 

 

 

 

Electrical

 

Normal

 

79 W

 

99 W

 

 

Standby

 

 

2 W

 

 

 

 

Consumption

 

 

 

 

 

 

 

 

 

Anti-frost Protection

 

100 W

 

116 W

 

By-Pass Control

 

Fixed

 

Electronic

 

 

 

Minimum Gas Supply

 

Natural Gas

 

 

5.0 inch W.C.

 

 

 

 

Pressure

 

Propane

 

 

8.0 inch W.C.

 

 

 

 

Maximum Gas Supply

 

Natural Gas

 

 

10.5 inch W.C.

 

 

 

 

Pressure

 

Propane

 

 

13.5 inch W.C.

 

 

 

 

Type of Appliance

 

Direct Vent, Temperature controlled continuous flow gas hot water system.

Operation

 

With or without remote controls, mounted in kitchen, bathroom, etc.

Approved Gas Type

 

Natural Gas or Propane - Ensure unit matches gas type supplied at the installation location.

Connections

 

Gas Supply: 3/4" MNPT, Cold Water Inlet: 3/4" MNPT, Hot Water Outlet: 3/4" MNPT

 

 

 

 

 

 

 

 

 

 

Ignition System

 

 

Direct Electronic Ignition

 

 

 

Electric Connections

 

Appliance: AC 120 Volts, 60Hz. Remote Control: DC 12 Volts (Digital)

 

 

 

 

 

 

 

 

 

Water Temperature Control

 

Simulation Feedforward and Feedback.

 

 

 

Water Supply Pressure

 

Minimum Water Pressure: 20 PSI (Recommended 30-80 PSI for maximum performance)

 

 

 

 

 

 

 

 

 

Maximum Water Supply Pressure

 

 

150 PSI

 

 

 

 

Remote Control Cable

 

 

Non-Polarized Two Core Cable (Minimum 22 AWG)

 

 

 

 

 

 

 

 

 

 

 

*Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature.

**for commercial and hydronic applications requiring higher temperatures

Rinnai is continually updating and improving products. Therefore, specifications are subject to change without prior notice.

The maximum inlet gas pressure must not exceed the value specified by the manufacturer. The minimum value listed is for the purpose of input adjustment.

VA Series Indoor LS Manual

3

Consumer Safety Information

Safety Definitions

This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others.

DANGER

WARNING

CAUTION

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

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

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.

Safety Behavior and Practices

WARNING

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

Do not use this appliance if any part has been under water. 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 under water.

This appliance is equipped with a three-prong plug for your protection against shock hazard and should be plugged directly into a properly grounded threeprong receptacle. Do not cut or remove the ground prong from this plug.

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

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

Safety Features

Overheat: The appliance will automatically shut down when the appliance exceeds a predetermined temperature.

Flame Failure: The appliance will automatically shut down if the burner flame is extinguished.

Power Failure: The appliance will cut off the gas if it loses electrical power.

Power Surge Fuse: A glass fuse protects against overcurrent. If the fuse blows then all indicator lamps will be off.

Fusible Link: In case the overheat feature does not prevent the temperature from rising then the fusible link will break shutting off the appliance.

4

VA Series Indoor LS Manual

Description of Operation

The Rinnai water heater is one of the most advanced water heaters available. It provides a continuous supply of hot water at a preset temperature. This appliance is direct vent where air is brought in from the outside and combustion gases are exhausted to the outside.

While electricity, water, and gas supplies are connected, the Rinnai water heater produces hot water whenever a hot water tap is open.

Ignition is electronic. There is no pilot light consuming gas while the water heater is not being used. The gas burner lights automatically when the hot water tap is opened and goes out when the tap is closed.

Installation of the temperature controller is highly recommended. The temperature controller can set the temperature within a specific range and can provide error codes to diagnose any problems.

The temperature of the outgoing hot water is constantly monitored. The Rinnai water heater may adjust the water flow in order to maintain the temperature setting. The water flow may vary from summer to winter due to the difference in ground water temperature.

Operating Instructions

Features Available on Temperature Controllers

The MC-91 temperature controller is supplied with the appliance. Additional functions are available through the use of optional controllers.

Features

Call

Clock

Error Codes

Function

In Use Indicator

ON/OFF Button

Power Save

Priority Button /

Indicator

Sound Volume

Temperature Display

Thermostat

Water Smart / Bath Fill

Button / Indicator

Water Volume

91-MC

91-MCC

100-MC

100-BC

502-MC

Description

 

 

 

 

 

 

 

 

 

 

 

 

Sends a short series of beeps to all controllers in the system. It is

 

 

 

 

 

not an intercom.

 

 

 

 

 

 

12 hour AM/PM clock.

 

 

 

 

 

 

When a fault is detected an error code flashes at the temperature

 

 

 

 

 

display on models MC-91, MCC-91, and MC-502; and flashes at

 

 

 

 

 

 

the clock display on models MC-100 and BC-100.

 

 

 

 

 

 

Used on this model to set the clock or sound volume.

 

 

 

 

 

 

Indicates that hot water is being supplied (i.e. a hot water tap is

 

 

 

 

 

 

open).

 

 

 

 

 

 

Used to turn the water heater ON or OFF.

 

 

 

 

 

 

Allows the temperature controller to be in an energy saving

 

 

 

 

 

 

mode.

 

 

 

 

 

 

Indicates that this controller is setting the temperature . Priority

 

 

 

 

 

 

can be switched to another controller by pressing its Priority

 

 

 

 

 

 

Button when no hot water is running.

 

 

 

 

 

 

Used to adjust the voice prompt volume.

 

 

 

 

 

 

Shows the temperature setting.

 

 

 

 

 

 

Increases or decreases the temperature setting.

 

 

 

 

 

 

Used to select the Water Smart / Bath Fill Function to fill a bath

 

 

 

 

 

 

with a predetermined volume of water.

 

 

 

 

 

 

Used to select the water volume for the Water Smart / Bath Fill

 

 

 

 

 

 

Function.

 

 

 

 

 

VA

Series Indoor LS Manual

5

Temperature Controllers - Models

MC-91-1US & MCC-91-1US

Dimensions (inches): 3.5 W x 4.75 H x 0.75 D

The MC-91 controller is the standard temperature controller that is supplied with the water heater. On indoor models it is integrated into the front panel. The MCC-91 controller is for commercial and hydronic applications requiring higher temperatures. When the MCC-91 controller is connected, these higher temperatures are available on all controller models in the system. Refer to the section on temperature ranges.

In Use

Indicator

Priority

Indicator

Temperature

Display

Priority

Button

Thermostat

ON/OFF

Button

MC-502RC-1US-S * (Wireless)

Dimensions (inches): 4.33 W x 5.90 H x 1.16 D

Temperature

Priority

Indicator

Display

 

 

In Use

Thermostat

Indicator

ON/OFF

Priority

Button

Button

*Requires the transceiver, MC- 502RC-1US-M, to be connected to the water heater.

Refer to the MC-502RC-1US-S manual and the Wireless Controller Installation Instructions for complete details on features, operation, and installation.

6

VA Series Indoor LS Manual

Rinnai R50LSI, R75LSI, R94LSI, R98LSI, R98LSI-ASME User Manual

Temperature Controllers - Models

BC-100V-1US

Dimensions (inches): 8.0 W x 4.125 H x 0.875 D

NOTICE The BC-100V controller is water resistant. Avoid splashing the controller.

In Use

Temperature

Water Smart

Indicator

Display

Bath Fill Indicator

Priority

 

ON/OFF

Button and

 

Button

Indicator

 

 

 

 

Water Smart

Call

 

Bath Fill

 

 

Button

Clock

 

Power Save

 

 

 

 

Water Volume

Thermostat

Sound Volume

 

MC-100V-1US

Dimensions (inches): 5.0 W x 4.75 H x 0.75 D

In Use

Thermostat

 

Indicator

 

 

Function

Temperature

 

Display

 

 

Priority Button

Clock

and Indicator

 

ON/OFF

Call

Button

 

VA Series Indoor LS Manual

7

Setting the Temperature

DANGER

Hot water can be dangerous, especially for infants or children, the elderly, or infirm. There is hot water scald potential if the thermostat is set too high.

Water temperatures over 125º F (51º C) can cause severe burns or scalding resulting in death.

Hot water can cause first degree burns with exposure for as little as: 3 seconds at 140º F (60º C)

20 seconds at 130º F (54º C)

8 minutes at 120º F (48º C)

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

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

1. Press the “Priority button” on the temperature controller. The green Priority light will glow indicating that this controller is controlling the temperature and that the Rinnai water heater is ready to supply hot water.

The priority can only be changed while no hot water is running.

2.Press the ▲ or ▼ buttons to obtain the desired temperature setting.

All hot water sources are able to provide water at this temperature setting until it is changed again at this or another temperature controller.

NOTICE

While any hot water is being

provided, the temperature setting can

 

only be adjusted between 98º F and

 

110º F.

NOTICE

Check local codes for the maximum

water temperature setting allowed

 

when used in nursing homes,

 

schools, day care centers, and all

 

other public applications.

NOTICE

If a newly installed unit with a

controller has not been powered for

 

at least 6 hours then the temperature

 

will return to the default setting of

 

104º F (40º C) if power is interrupted.

NOTICE

There may be a variation between

the temperature displayed on the

 

temperature controller and the

 

temperature at the tap due to

 

weather conditions or the length of

 

pipe to the water heater.

Temperature Options Without a Temperature Controller

The default temperature setting for this appliance installed without a temperature controller is 120º F (49º C). If desired the temperature setting can be changed to 140º F (60º C) by adjustment of a dip switch.

Set dip switch 5 to ON to obtain 140º F water temperature setting.

Set dip switch 5 to OFF (default) to obtain 120º F water temperature setting.

WARNING

DO NOT adjust the other dip

switches unless specifically

 

 

instructed to do so.

120º F (49º C)

140º F (60º C)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Switch No.

Switch No.

 

 

 

 

 

 

ON

 

 

 

 

 

 

ON

 

 

O

 

 

 

 

 

O

 

 

 

 

 

 

1

 

 

 

 

 

 

1

 

 

F

 

 

 

 

2

 

 

F

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

F

 

 

 

 

 

 

F

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

VA Series Indoor LS Manual

Temperature Ranges

This water heater will attempt to provide hot water at the temperature setting even when the water flow is varied or when more than 1 tap is in use. The water heater can deliver water at only one temperature setting at a time. The available temperatures for a given model are provided below.

Model

 

 

 

 

Temperature Settings Available (ºF)

 

 

 

 

R50LSi

98

100

102

104

106

108

110

115

120

125

130

135

140

150

160

 

R75LSi

 

 

 

 

 

 

 

 

 

 

 

 

 

*

*

 

R94LSi

98

100

102

104

106

108

110

115

120

125

130

135

140

150

160

185

R98LSi

R98LSi-ASME

 

 

 

 

 

 

 

 

 

 

 

 

 

*

*

*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Temp in Celsius ºC

37

38

39

40

41

42

43

46

49

52

54

57

60

66

71

85

*

*

*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*MCC-91 Temperature Controller

These settings require the MCC-91 controller. When the MCC-91 controller is connected, these higher temperatures are available on all controller models in the system. Use of an MCC-91 controller in a residential dwelling will reduce the warranty coverage to that of a commercial warranty application.

The MCC-91 controller is intended for commercial and hydronic applications only. If an MCC-91 controller is used in a residential dwelling for a hydronics application, a mixing valve must also be installed to limit the potable hot water temperature to a safe temperature. Water temperatures over 125º F (51º C) can cause severe burns or scalding. Refer to the Danger Alert on water temperatures. Rinnai shall not, in any event, be liable for damages resulting from such misuse or misapplication.

Suggested temperatures are

Kitchen

120 ºF (49º C)

Shower

98º - 110º F (37º - 43º C)

Bath Fill

102º - 110º F (39º - 43º C)

These temperatures are suggestions only.

A temperature lower than 98º F (37º C) can be obtained at the tap by mixing with cold water.

To change the temperature scale from Celsius to Fahrenheit or vice versa, press and hold the “On/Off” button for 5 seconds while the water heater is OFF.

Setting the Sound Volume (Voice Prompt)

MC-100V Press the “Function” button to adjust the voice prompt volume. The default sound volume is set to Medium. Each subsequent press of the ▲ or ▼ button cycles through the volume levels in the order below.

Medium Volume

High Volume

Off Volume

(default)

(beep)

 

BC-100V Press the “Sound Vol.” button to adjust the voice prompt volume. The default sound volume is set to Medium. Each subsequent press of the button cycles through the volume levels in the order below.

Off Sound

Low Volume

(no beep)

 

VA Series Indoor LS Manual

9

Using the Water Smart / Bath Fill Function

Overview

This function is exclusive to the BC-100V temperature controller. The bath fill function allows the consumer to fill a tub with a preset volume of water at a preset temperature. This is done by pressing the bath fill button on the BC-100V controller while no hot water is flowing and then opening only the hot water tap. The water heater will stop the hot water flow when the preset volume has been reached. The hot water tap should then be closed and the bath fill button pressed.

The temperature settings for the bath fill function are limited to those in the table below.

 

 

Bath Fill Temperature Settings Available

 

 

 

 

 

 

 

 

 

 

 

 

ºF

98

 

100

102

104

106

108

110

115

 

120

 

 

 

 

 

 

 

 

 

 

 

 

ºC

37

 

38

39

40

41

42

43

46

 

49

 

 

 

 

 

 

 

 

 

 

 

 

NOTICE

Multiple

Water

Heaters

NOTICE

Power

Loss

The bath fill function will not work properly if it is connected to multiple water heaters. The tub will overfill because the bath fill function is not able to measure the water volume when connected to multiple water heaters.

If power is lost during the bath fill function, the water heater will shut down but the water will continue to flow. When power returns, the water shuts off and Error Code 03 appears on the controller.

If power is lost after the bath has filled but before the bath fill function button is de-selected, then the water will not flow during the power loss or after the power is returned. Once power returns, close the hot water tap and de-select the bath fill function. No error code appears.

Setting the Water Volume

The default volume is set to 25 gallons. The volume can be set between 10 and 120 gallons.

1. Press the “Priority button” on the temperature controller. The green Priority light will glow indicating that this controller is controlling the temperature and that the Rinnai water heater is ready to supply hot water.

2.Press the “Temp” ▲ or ▼ buttons to obtain the desired temperature

setting.

3.Press the “Water Vol.”▲ or ▼ buttons to obtain the desired

water volume in gallons.

NOTICE

Anti-scald

Fixtures

NOTICE

To Prevent

Over Filling

Do not use with single handle fixtures that have anti-scald features built into them. These fixtures allow a predetermined amount of cold water which is not taken into account by the bath fill function.

Be careful not to overfill the bath. An average bath volume is 60 gallons. When filling the bath using this function for the first time:

Monitor and remain by the bath while the water is running.

Use a low bath fill volume less than 25 gallons

10

VA Series Indoor LS Manual

Using the Water Smart / Bath Fill Function

Filling the Tub

1. Press the “Water Smart / Bath Fill” button once. The button will illuminate, a tone will sound, and the word “Bath” will appear next to the temperature setting.

 

2. The voice prompt will announce

ON! COLD

“The hot water system is ready.

 

Open the hot water tap.”

 

Open the hot water tap. The “In

HOT

Use” indicator will illuminate on all

controllers. The hot water will

 

 

begin to flow.

NOTICE

To Stop the Bath Fill Before it Finishes

To stop the water flow during the Bath Fill function, press the “Water Smart / Bath Fill” button. The button will flash and the voice prompt will announce, “Hot water is not available. Turn off all hot water taps and push the Bath Fill button.” Follow the voice prompt instructions.

ON! COLD

HOT

3.When the preset volume of water has been produced then

the water flow will cease

the “Water Smart / Bath Fill” button will flash

a tone will sound

the voice prompt will announce, “Bath fill is complete. Turn off the bath hot water tap and push the Bath Fill button.”

4.Turn off the bath hot water tap and push the Bath Fill button. The water heater will not allow hot water to flow from any source until the “Water Smart / Bath Fill” button is pushed.

The button light will go out and the word “Bath” will disappear from the display.

NOTICE

When

Other Taps

Are Open

During the bath fill function, any hot water flowing at other locations, subtracts from the total amount of water for the bath. For example if the bath fill function is set for 50 gallons and 5 gallons of hot water are used at other locations during the fill period then the bath will only fill with 45 gallons.

Setting Controller to Mute

Models MC-91 and MCC-91

To eliminate the beeps when keys are pressed or to turn the beeps back on, press and hold both the ▲and ▼ buttons until a beep is heard (approximately 5 seconds).

Setting the Clock

MC-100V Press the “Function” button twice within 10 seconds to set the clock. Press the ▲ or ▼ button to reach the desired time. The clock on the BC-100V automatically shows the time which has been set on the MC-100V.

VA Series Indoor LS Manual

11

Maintenance

WARNING

Turn off the electrical power supply, the manual gas valve and the manual water control valve whenever servicing the unit.

Repairs and maintenance should be performed by a qualified service technician. The appliance should be inspected annually by a qualified service technician. Verify proper operation after servicing.

Cleaning

It is imperative that control compartments, burners, and circulating air passageways of the appliance be kept clean.

Clean as follows:

1.Turn off and disconnect electrical power. Allow to cool.

2.Remove and clean the water inlet filter.

3.Remove the front panel by removing 4 screws.

4.Use pressurized air to remove dust from the main burner, heat exchanger, and fan blades. Do not use a wet cloth or spray cleaners on the burner. Do not use volatile substances such as benzene and thinners. They may ignite or fade the paint.

5.Use soft dry cloth to wipe cabinet.

Vent System

The vent system should be inspected at least annually for blockages or damage.

Motors

Motors are permanently lubricated and do not need periodic lubrication. Keep fan and motor free of dust and dirt by cleaning annually.

Temperature Controller

Use a soft damp cloth to clean the temperature controller. Do not use solvents.

Lime / Scale Build-up

If you receive Error Code “LC”, refer to the procedure,

Flushing the Heat Exchanger. Refer to the section on

Water Quality to see if your water needs to be treated or conditioned. (When checking maintenance code history, “00” is substituted for “LC”.)

Snow Accumulation

Keep the area around flue terminal free of snow and ice. The appliance will not function properly if the intake air or exhaust is impeded (blocked or partially blocked) by obstructions.

Visual Inspection of Flame

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 the view ports.

The flame pattern should be as shown in the figures below.

12

VA Series Indoor LS Manual

Error Codes

The Rinnai water heater has the ability to check its own operation continuously. If a fault occurs, an error code will flash on the Display of the temperature controller. This assists with diagnosing the fault and may enable you to overcome a problem without a service call. Please identify the code displayed when inquiring about service.

WARNING

Some of the checks below may need to be done by a qualified service technician. Call a

service technician for any remedy that involves gas or electricity. Call a service

 

 

 

technician if you have any doubt or reservation about performing the remedy yourself.

 

 

 

 

Code

Fault

 

Remedy

02

No burner operation during

Service Call

 

freeze protection mode

 

 

 

 

03

Power interruption during

Turn off all hot water taps. Press ON/OFF twice.

 

Bath Fill (Water will not flow

 

 

when power returns).

 

 

 

 

10

Air Supply or Exhaust

Ensure Rinnai approved venting materials are being used.

 

Blockage

 

Check that nothing is blocking the flue inlet or exhaust.

 

 

 

Check all vent components for proper connections.

 

 

 

Ensure vent length is within limits.

 

 

 

Ensure condensation collar was installed correctly.

 

 

 

Verify dip switches are set properly.

 

 

 

Check fan for blockage.

 

 

 

 

11

No Ignition

 

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

 

 

 

Ensure gas type and pressure is correct.

 

 

 

Ensure gas line, meter, and/or regulator is sized properly.

 

 

 

Bleed all air from gas lines.

 

 

 

Verify dip switches are set properly.

 

 

 

Ensure appliance is properly grounded.

 

 

 

Disconnect EZConnector MSA controls to isolate the problem.

 

 

 

Ensure igniter is operational.

 

 

 

Check igniter wiring harness for damage.

 

 

 

Check gas solenoid valves for open or short circuits.

 

 

 

Remove burner cover and ensure all burners are properly seated.

 

 

 

Remove burner plate and inspect burner surface for condensation or debris.

12

Flame Failure

 

Check that the gas is turned on at the water heater and gas meter. Check for

 

 

 

obstructions in the flue outlet.

 

 

 

Ensure gas line, meter, and/or regulator is sized properly.

 

 

 

Ensure gas type and pressure is correct.

 

 

 

Bleed all air from gas lines.

 

 

 

Ensure proper Rinnai venting material was installed.

 

 

 

Ensure condensation collar was installed properly.

 

 

 

Ensure vent length is within limits.

 

 

 

Verify dip switches are set properly.

 

 

 

Ensure appliance is properly grounded.

 

 

 

Disconnect keypad.

 

 

 

Disconnect EZConnect™ or MSA controls to isolate the problem.

 

 

 

Check power supply for loose connections.

 

 

 

Check power supply for proper voltage and voltage drops.

 

 

 

Ensure flame rod wire is connected.

 

 

 

Check flame rod for carbon build-up.

 

 

 

Disconnect and reconnect all wiring harnesses on unit and PC board.

 

 

 

Check for DC shorts at components.

 

 

 

Check gas solenoid valves for open or short circuits.

 

 

 

Remove burner plate and inspect burner surface for condensation or debris.

 

 

 

 

VA Series Indoor LS Manual

13

Code

Fault

Remedy

 

 

 

14

Thermal Fuse

Check gas type of unit and ensure it matches gas type being used.

 

 

Check for restrictions in air flow around unit and vent terminal.

 

 

Check for low water flow in a circulating system causing short-cycling.

 

 

Ensure dip switches are set to the proper position.

 

 

Check for foreign materials in combustion chamber and/or exhaust piping.

 

 

Check heat exchanger for cracks and/or separations.

 

 

Check heat exchanger surface for hot spots which indicate blockage due to scale build-

 

 

up. Refer to instructions in manual for flushing heat exchanger.

 

 

Measure resistance of safety circuit.

 

 

Ensure high fire and low fire manifold pressure is correct.

 

 

Check for improper conversion of product.

16

Over Temperature

Check for restrictions in air flow around unit and vent terminal.

 

Warning

Check for low water flow in a circulating system causing short-cycling.

 

 

Check for foreign materials in combustion chamber and/or exhaust piping.

 

 

Check for clogged heat exchanger.

32

Outgoing Water

Check sensor wiring for damage.

 

Temperature Sensor

Measure resistance of sensor.

 

Fault

Clean sensor of scale build-up.

 

 

Replace sensor.

33

Heat Exchanger

Check sensor wiring for damage.

 

Outgoing Temperature

Measure resistance of sensor.

 

Sensor Fault

Clean sensor of scale build-up.

 

 

Replace sensor.

34

Combustion Air

Check for restrictions in air flow around unit and vent terminal.

 

Temperature Sensor

Check sensor wiring for damage.

 

Fault

Measure resistance of sensor.

 

 

Clean sensor of scale build-up.

 

 

Ensure fan blade is tight on motor shaft and is in good condition.

 

 

Replace sensor.

52

Modulating Solenoid

Check modulating gas solenoid valve wiring harness for loose or damaged terminals.

 

Valve Signal Abnormal

Measure resistance of valve coil.

61

Combustion Fan

Ensure fan will turn freely.

 

Failure

Check wiring harness to motor for damaged and/or loose connections.

 

 

Measure resistance of motor winding.

65

Water Flow Control

The water flow control valve has failed to close during the bath fill function. Immediately

 

Fault

turn off the water and discontinue the bath fill function. Contact a state qualified or

 

 

licensed contractor to service the appliance.

71

SV0, SV1, SV2, and

Check wiring harness to all solenoids for damage and/or loose connections.

 

SV3 Solenoid Valve

Measure resistance of each solenoid valve coil.

 

Circuit Fault

 

72

Flame Sensing Device

Ensure flame rod is touching flame when unit fires.

 

Fault

Check all wiring to flame rod for damage.

 

 

Remove flame rod and check for carbon build-up; clean with sand paper.

 

 

Check inside burner chamber for any foreign material blocking flame at flame rod.

 

 

Measure micro amp output of sensor circuit with flame present.

 

 

Replace flame rod.

LC

Scale Build-up in Heat

Flush heat exchanger. Refer to instructions in manual.

 

Exchanger (when

Replace heat exchanger.

 

checking maintenance

NOTE: The LC code is the only error code that will allow the unit to keep running. The

 

code history, “00” is

display will alternate between the LC code and the temperature setting. The controller

 

substituted for “LC”)

will continue to beep. The LC code will reset if power is turned off and then on.

No

Nothing happens when

Clean inlet water supply filter.

code

water flow is activated.

On new installations ensure hot and cold water lines are not reversed.

 

 

Check for bleed over. Isolate unit from building by turning off hot water line to building.

 

 

Isolate the circulating system if present. Open your pressure relief valve; if water is

 

 

flowing, there is bleed over in your plumbing.

 

 

Ensure you have at least the minimum flow rate required to fire unit.

 

 

Ensure turbine spins freely.

 

 

Measure the resistance of the water flow control sensor.

 

 

Check for DC shorts at components.

 

 

 

14

VA Series Indoor LS Manual

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