Rinnai REU-V3237FFU, REU-V3237FFUC-ASME, REU-V3237W-ASME, REU-V3237WC-ASME, R98i Operation & Installation Manual

Operation / Installation Manual

To Suit Models:

R98i

REU-V3237FFU
REU-V3237FFU-ASME

C98i

REU-V3237FFUC
REU-V3237FFUC-ASME

R98e

REU-V3237W
REU-V3237W-ASME

C98e

REU-V3237WC
REU-V3237WC-ASME

(Residential and Commercial for indoor and outdoor unit)

ANS Z21.10.3"CSA 4.3

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.

C O N T E N T S

Specifications

Limited Warranty

Owner’s Installation Information

................................................................................ 3

.......................................................................... 4,5

..................................................... 6

Features of Your New Water Heater

Safety Considerations

Basic Operation

..................................................................

General Controller Information

Remote Controller Operation

Deluxe Controllers

................................................................... 8

.................................................... 10

...................................................... 11

...............................................

......................

.... 12,13,14,15,16

....................... 7

........... 9

Controllers Set Pattern/Temperature Tables

Error Messages

Maintenance & Service Information

...................................................................... 18,19

............................. 20,21,22,23

Trouble Shooting and Common Questions

For Your Safety Read Before Operating

Operating Instructions

Care & Lime Condition Warning

Installer’s Instructions

Notes

........................................................................................... 51

............................................................. 25,26

.................................................. 26

............................................................. 27-50

.................................... 25

..........

..................... 17

................................. 24

Rinnai Corporation

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V3237 Models

SPECIFICATIONS

Unless otherwise indicated model designations include both non-ASME and ASME models

Model V3237FFU V3237FFUC V3237W V3237WC

Minimum Gas Consumption Btu/h
Maximum Gas Consumption Btu/h
Hot water capacity, (50°F rise)
Ho

t water capacity, (35°F rise)
Factory TemperatureSetting (no Controller)
Default Controller Temperature Setting
Maximum Temperature Setting
Minimum Temperature Setting
Weight
Efficiency
Rating
Noise level

Electrical
Consumption

By-Pass Control
Minimum

Gas Supply
Pressure

Maximum
Gas Supply
Pressure

Type of Appliance
Operation
Exhaust System
Approved Gas Type
Service Connections
Ignition System
Electric Connections
Water Temperature Control
Water Supply Pressure
Maximum Water Supply Pressure
Remote Control Cable

Safety Devices

Natural Gas
Propane

Normal
Standby (1 controller ON)
Anti-frost Protection

Natural Gas
Propane
Natural Gas
Propane

120°F
104°F
140°F

80％
84％

99 watts

Temperature controlled continuous flow gas hot water system.

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

Natural Gas or Propane - Ensure unit matches gas type it's being installed on.

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

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

Minimum Water Pressure: 15 PSI (Recommended 30-80 PSI for maximum performance)

207°F Bi-Metal Switch Over Heat Temperature Protection

Automatic Frost Protection - Bi-Metal Sensor & Anti-Frost Heaters

Combustion Fan RPM Check - Integrated Circuit

140°F
140°F
185°F

Direct Vent - Forced Combustion

Direct Electronic Ignition

Simulation Feedforward and Feedback.

Non-Polarized Two Core Cable

Flame Failure - Flame Rod

Boiling Protection - 210°F

Over Current - Glass Fuse (3 amp)

19,000

237,000

0.6 to 8.0 GPM

0.9 to 9.8 GPM

98°F

55 Lbs.

49 dB (A)

2 watts

116 watts

Electronic

6" W.C.

10" W.C.

10.5" W.C.

13.5" W.C.

150 PSI

Thermal Fuse 264°F

120°F
104°F
140°F

140°F
140°F
185°F

82％
85％

72 watts

Rinnai is continually updating and improving products, therefore, specifications are
subject to change without prior notice. Local, state, provincial and federal codes must
be adhered to prior to installation.

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V3237 Models

LIMITED WARRANTY

Period of Coverage

Item

Commercial Residential

Heat Exchanger 5 Years * 10 Years *

All other Parts and

Components

5 Years * 5 Years *

Reasonable Labor 1 Year

Rinnai Water Heater

Warranty121205COMM-V2

WHAT IS COVERED?

This Warranty covers any defects in materials or workmanship when the product is installed and
operated according to Rinnai written installation instructions, subject to the terms within this limited
warranty document. This Warranty applies only to products that are installed by a state qualified
or licensed contractor. Improper

installation may void this Warranty. Rinnai strongly suggests
that you use an installer who has attended a Rinnai product knowledge class before installing
this water heater. This Warranty extends to the original purchaser and subsequent owners, but
only while the product remains at the site of the original installation. This Warranty only extends
through the first installation of the product and terminates if the product is moved or reinstalled at
a new location.

HOW LONG DOES COVERAGE LAST?

*Important
Period of coverage is 3 years from date of purchase when used as a circulating water heater
within a hot water circulation loop, when the water heater is in series with a circulation system and
all circulating water flows through the water heater.

WHAT WILL RINNAI DO?

Rinnai will repair or replace the product or any part or component that is defective in materials
or workmanship, except as set forth below: Rinnai will pay reasonable labor and shipping costs
to repair the product. All repairs must be performed using genuine Rinnai parts. All repairs or
replacements must be performed by an individual or servicing company that is state qualified or
licensed to do this type of repair.

Replacement of the product or replacement of the heat exchanger may be authorized by Rinnai
only. Rinnai does not authorize any person or company to assume for it any obligation or liability
in connection with the replacement of a product or heat exchanger. If Rinnai determines that
repair of a product is not possible, Rinnai will replace the product with a comparable product, at
Rinnai’s discretion. If a component or product returned to Rinnai is found to be free of defects in
material or workmanship, or damaged by improper installation or damaged during return shipping,
the warranty claim for product, parts and labor may be denied.

Rinnai Corporation

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V3237 Models

LIMITED WARRANTY

Rinnai Water Heater

Warranty121205COMM-V2

HOW DO I GET SERVICE?

Simply contact a qualified Service Dealer or Installer for the repair of products under this Warranty.

Failure to use a qualified Service Dealer or Installer to provide repair service may void the
Warranty. For the name of the qualified Service Dealer or Installer nearest you, please contact

the company that installed the water heater, or;

• Your local HVAC/plumbing dealer, gas service technician or place of purchase

• Visit the Rinnai website www.rinnai.us

• Call Rinnai at 1-800-621-9419 or write to Rinnai, 103 International Drive, Peachtree City, Georgia

30269

Proof of purchase is required to obtain warranty service. You can show proof of purchase with a
dated sales receipt, by completing and mailing the enclosed Warranty registration card within 30
days of purchasing the product or by registering online at www.rinnai.us . Please complete the

Warranty registration either online or mail it to Rinnai at the address shown on the card.

Receipt of warranty registration by Rinnai will constitute proof-of-purchase for this product.
However, Warranty registration is not necessary in order to validate this Warranty.

WHAT IS NOT COVERED?

This Warranty does not cover any failures or operating difficulties due to accident, abuse, misuse,
alteration, misapplication, acts of God, improper installation, improper maintenance or service,
inadequate water quality, scale buildup, freeze damage or for any other causes other than defects
in materials or workmanship. This warranty does not apply to any product whose serial number or
manufacture date has been defaced. This Warranty does not cover any product when used as a
pool or spa heater. (See Water Quality in Care & Lime Section.)

Rinnai is not liable for any special, incidental, indirect or consequential damages that may arise,
including damage to person or property, loss of use, failure to install drain pan under unit, or
inconvenience. Some states do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitation may not apply to you.

LIMITATION ON IMPLIED WARRANTIES

Any implied warranties of merchantability and fitness 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.

This Warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.

Rinnai Corporation

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V3237 Models

OWNER’S INSTALLATION INFORMATION

REU-V3237FFU-ASME
REU-V3237FFUC-ASME
REU-V3237W-ASME

REU-V3237WC-ASME

All Rinnai water heater(s) SHOULD be installed by a state qualified or
licensed contractor. Failure to comply with state and local codes
pertaining to water heater installation may void the warranty on your
new water heater(s). It is the responsibility of the person having the
water heater installed to ensure the installer has proper licences and
permits for installing water heater(s) in your location. In addition to
licensing and permits, Rinnai encourages all installing contractors to
attend a product knowledge class before installing any of our water
heaters to help insure maximum customer satisfaction and maximum
warranty coverage.

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

These models have been built in accordance with
the requirements of the ASME Boiler and Pressure
Vessel Code and have received the Certificate of
Authorization from the National Board. The heat
exchangers on these units have the NB and the
HLW stamps.

FOR INDOOR UNITS: These models have the “FFU” designation

ONLY Install this product indoors, DO NOT install outdoors.
FOR OUTDOOR UNITS: These models have the “W” designation
ONLY 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 hot water heater are included at the back
of this manual.

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V3237 Models

F E A T U R E S O F Y O U R N E W WATER HEATER

The Rinnai is one of the most advanced water heaters available. It supplies hot water

F

F

F

F

continuously at the temperature preset in the unit or at the temperature set on the
optional remote controller(s). Installation of remote controllers are recommended for
optimum functionality.

The Rinnai never runs out of hot water, while electricity, water and gas supplies are

connected. The Rinnai produces hot water whenever the hot water tap is open.

The gas burner lights automatically when the hot water tap is opened and shuts off 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 Rinnai.

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
temperature (shown on the digital remote controller) the gas burner automatically shuts
off. The gas burner will re-ignite once the outgoing hot water temperature falls below the
selected temperature.

O

F above the selected

Built into the microprocessor of the Rinnai is the ability to LIMIT THE MAXIMUM

F

F

F

F
F
F

TEMPERATURE of the hot water supplied by the Rinnai Water Heaters. Without the
connection of a remote controller(s), the Rinnai Water Heater is preset to deliver water at

O

F (Residential) and 140OF (Commercial).

120

Residential Unit: With the remote controller(s) the water temperature is adjustable from

O

F to 140OF. The water temperature cannot be set to a temperature other than

98

O

F without the use of a remote controller unit.

120

Commercial Unit: With the remote controller the water temperature is adjustable up to

Error messages are displayed on the remote controllers, simplifying service calls.

The Rinnai Water Heater is a very compact device, saving valuable floor and wall space.

The Rinnai Water Heater incorporates a device to minimize temperature fluctuations

O

F. The water temperature cannot be set to a temperature other than 140OF

185

without the use of a remote controller unit.

(cold water sandwich effect) when the water is shut off, then turned on again. This effect
can be eliminated by installing Rinnai Water Heaters with a circulation loop and a small
storage tank.

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V3237 Models

SAFET Y CON SI DER ATIO NS

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

The Rinnai Water Heater controls 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 controller(s) is altered. The water
flow may also vary from summer to winter, as
incoming water temperatures differ.

Depending on the weather conditions and
the length of the pipe between the Rinnai
Water Heater and the tap in use, there may
be a variation between the temperatures
displayed at the Remote Controller(s) and the
temperature of the water at the tap.

Do not clean Remote Controller(s) with
solvents. Use a soft damp cloth.

Summer 60°F
Incoming water

The water temperature can only be adjusted
between 98°F and 110°F when the hot water
tap is open, and hot water is flowing.

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Winter 40°F
Incoming water

The vent/air intake should be positioned away
from flammable materials, trees, shrubs, etc.

Do not connect the vent to natural draft vents
or fireplaces, the indoor unit can only be used
with an approved vent kit and components.
Do not vent unit into other rooms. The Vent
termination must be located outside.

8

V3237 Models

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

1

2

Adjusting Temperature

The outlet water temperature of the Rinnai
Water Heater can only be adjusted using the
remote controller(s). To adjust the setpoint
temperature of the Rinnai Water Heater
above the 110 °F, all hot water taps must
be closed, and all circulating pumps turned
off (where applicable). The temperature
displayed on this remote controller will
also be displayed on all other Remote
Controller(s).

TEMPERATURE CAN ONLY BE ADJUSTED
BETWEEN 98°F AND 110°F WHEN ANY
HOT WATER TAP IS OPEN.

To take control of the Rinnai Water Heater,
all hot water taps must be closed. Press
the "Priority” button on the Controller you
want to set the temperature with, and
the "Priority" indicator light will glow. This

Simply press the or button

3

until the desired temperature is
displayed on the Digital Monitor.

There is a hot water scald potential
if the thermostat is set to high.

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

indicates that the Rinnai Water Heater
is ready to supply hot water at the set
temperature as soon as a tap is opened.
Note: The Rinnai water heater will not
provide hot water instantly at the hot water
fixtures. Any cold water existing in the hot
water lines must be purged first.

Check water temperature
before entering shower or
bath.

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To operate the Rinnai Water Heater
simply turn any hot water tap on.
This will automatically light the burner
providing hot water at the preset
temperature. If the optional remote
controller(s) have been installed, the
“IN USE” indicator will glow on all
remote controller(s).

9

V3237 Models

GE NERAL CONTRO LLER INF OR MAT ION

REMOTE CONTROLLERS IDENTIFICATION

MC-91-1US (comes with the unit)

BC-100V-1US (optional)

MC-100V-1US (optional)

The controller(s) for the Rinnai water heaters allow the customer to control the functions of the
water heater and to diagnose certain fault conditions.

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V3237 Models

REMOTE CONTROLLER OPERATION

In Use Indicator

Indicates that the hot water
heater is in operation.

Digital Display

ndicates the selected water

I

temperature. Error messages
flash in the event of a failure.

Thermostat

Increases or decreases
the desired water
temperature.

Priority Indicator

Indicates whether this
controller has priority
control over the water
temperature

Priority Button

Pressing takes control of the
water temperature by this
controller only when all taps
are off.

ON/OFF Button

Used to switch the
water heater on and off.

Diagnostic Use of Controller

1. To Display Maintenance Codes: Press the ‘On/Off’ button once to turn the controller off.
Press and hold the ‘On/Off’ button followed by

thermostat button to cycle through the

maintenance codes.

2. To Display Water Flow through the water heater: Press the

thermostat button and
hold for 2 seconds and then press the ‘On/Off’ button while continuing to hold the
thermostat button.

To Display Outlet Water Temperature: Press the thermostat button and hold for 2

3.
seconds and then press the ‘On/Off’ button while continuing to hold the

thermostat

button.

To Change the Temperature Display from °F to °C (or °C to °F)

Press the ‘On/Off’ button once to turn the controller unit off. With the controller off

1.
press and hold the ‘On/Off’ button until the display changes to °C (°F), approximately 5
seconds.

1.

To turn the sound off (mute) press and hold both the and thermostat buttons until

an audible “beep” is heard, approximately 5 seconds.

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To Turn Off the Sound (Mute)

11

V3237 Models

DELUXE CONTROLLER

Digital Display

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

ON/OFF

Used to switch the water heater on
and off.

Priority

Pressing takes control of the water
temperature by this controller only
when all taps are o

ff.

Function

Enables the user to set the clock
and sound volume functions.

Thermostat

Increases or decreases the desired
water temperature.

In Use Indicator

Indicates that the hot water heater is
in operation.

Water Temperature Indicator

Indicates the selected hot water
temperature.

Clock

12 Hour AM / PM clock. In the event
of a fault, codes for error messages
will flash here.

Call

Allows user to contact another
controlle

r. Can be used as a
communication channel for errands
or in emergency situations.

In Use Indicator

Indicates that the hot water heater is in operation.

Priority

Pressing takes control of the water
temperature by this controller only
when all taps are o

ff.

Call

Allows user to contact another
controlle

r. Can be used as a
communication channel for errands
or in emergency situations.

Clock

12 Hour AM / PM clock. In the event
of a fault, codes for error messages
will flash here.

Thermostat

Increases or decreases the desired
water temperature.

Sound Volume

Used to select the voice prompt
volume.

Water Smart / Bath Fill Indicator

Used to select

Water Smart / Bath Fill Function.

ON/OFF

Used to switch the water heater on
and o

ff.

Water Smart / Bath Fill

Used to select Water Smart / Bath
Fill Function.

Power Save

Indicates that the remote is in the
energy saving mode.

Water Volume

Used to select Water Smart / Bath
Fill volumes.

ABOUT THE DELUXE CONTROLLER (MC-100V-1US)

With power interruption, water heater will automatically default to the ON position to
provide hot water.

DE LUXE B AT HR OO M CON TR OL LER

ABOUT THE DELUXE BATHROOM CONTROLLER (BC-100V-1US)

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V3237 Models

DELUXE CONTROLLER

Setting The Sound Volume

Press the “Function” Button, the default voice prompt sound volume is set at medium. Each
subsequent press of the
the following order: High Voice - Off Voice (beep) - Off Sound (no beep) - Low Voice - Medium
Voice.

Setting The Clock (MC-100V Deluxe Controller ONLY)

The clock is a 12 hour AM/PM style display. To set the time, press the “Function” Button twice
within 10 seconds. Press the
the time you wish to set, press the button intermittently to avoid going further than the desired
time.

Press the ‘Function’ Button again to complete setting the clock and return to normal operation.

Adjusting Temperature

and Button will cycle through the available volume settings in

and Buttons to adjust the time. When you get close to

Simply press the

and buttons until the desired temperature is displayed on the Digital

Display.

To operate the hot water unit, open any hot water tap. This will automatically light the burner
providing hot water. The

“In Use” Indicator will illuminate on the Temperature Controller.

Once the hot water heater is in operation, if the set temperature is either too hot or cold, press
the

or buttons until the desired temperature is reached.

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TEMPERATURE CAN ONLY BE ADJUSTED
BETWEEN 98°F AND 110°F WHEN ANY
HOT WATER TAP IS OPEN.

13

V3237 Models

D E L U X E BAT H R OOM CONT R O L L E R

Setting the Sound Volume

The voice prompt sound volume for all Deluxe
Controllers can be set individually. Press
the “Sound Vol.” button. The default voice
prompt sound volume is set at medium. Each
subsequent press of the “Sound Vol.” will cycle
through the available volume settings in the
following order: High Voice - Off Voice (beep)

- Off Sound (no beep) - Low Voice - Medium
Voice.

Adjusting Temperature

Simply press the “Hot water temp.”

or
buttons until the desired temperature is
displayed on the Digital Display.

To Operate the product, open any hot water
tap. This will automatically light the burner
providing hot water. The

“In Use” Indicator

will illuminate on the Temperature Controller.

Once the hot water is running, if the set
temperature is either too hot or cold, press the
“Hot water temp.”

or buttons until the

desired temperature is reached.

A responsible adult should always check the water temperature before a child or
infirm person is place in contact with hot water.

TEMPERATURE CAN ONLY BE ADJUSTED
BETWEEN 98°F AND 110°F WHEN ANY
HOT WATER TAP IS OPEN.

Avoid getting water in the Controller(s) speaker as this may cause damage.

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V3237 Models

DELUX E BAT HRO OM CO NT ROLLE R

IT IS THE CUSTOMERS RESPONSIBILITY TO MONITOR THE BATH FILL
REMOTE CONTROLLER FUNCTIONS.

OPERATING THE WATER SMART / BATH FILL FUNCTION

The “Water Smart / Bath Fill” function allows a preset water volume and
temperature to be selected and run automatically.

Initial Settings

When you press the ‘Water Smart / Bath Fill” Button, a Shower / Bath
Water Volume will appear on the indicator. When a deluxe bathroom
controller(s) is first turned on, the default shower / bath fill water volume
is set to 25 gallons. The shower / bath water volume can be lowered to
a minimum of 10 gallons or raised to a maximum of 120 gallons.

Programming Shower / Bath Volume and Temperature

With the system on, select a Deluxe Bathroom controller(s) and ensure that it currently has
priority. If it does not have priority, press the ‘Priority’ button once. The “Priority” button will
illuminate.

To select the desired delivery temperature, use the
“Temp.”

or buttons.

The selected temperature will be displayed on the
bathroom controller monitor and will remain as the
default temperature until it is changed.

To select the volume of water to be used by the
shower / bath, use the “Water Vol.”

or buttons.

The selected water volume is numerically displayed at
the right of the controller monitor.

When filling a bath for the first time, it is recommended
that a low bath fill water volume such as 25 gallons
or lower (if available) be used. During any subsequent
bath fills, the volume can then be adjusted to suit your
known bath water volume and / or desired fill level.

Be careful not to overfill the bath. It is recommended that when filling a bath for the
first time you should:

• Remain by the bath during the filling process.

• Use a low bath fill volume such as 25 gallons or less.

The “Water Smart / Bath Fill” function is unavailable with the MSA Controller System.

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V3237 Models

DELUX E BAT HRO OM CO NT ROLLE R

HOTHOT

COLD

ON!OFF!

COLD

Using Water Smart / Bath Fill

Press “Water Smart / Bath Fill” button once. The “Water Smart / Bath
Fill” button will illuminate and a tone will sound. The “Bath” indicator
will also be displayed in the Kitchen Controller Monitor (Deluxe
Models ONLY).

The voice prompt will say “The hot water system is ready. Open the
hot water tap”.

Open the hot water tap for the relevant shower or bath.

The “In Use” indicator

will illuminate at all Deluxe Temperature

Controller(s) and the shower will run or the bath will start to fill.

To Stop Water Smart / Bath Fill Operation

If you wish to stop the water flow after the “Water Smart / Bath Fill”
function is selected, simply press the “Water Smart / Bath Fill” button.
The “Water Smart / Bath Fill” button will flash and the voice prompt
will say “Hot water is not available, turn off all hot water taps and
push the Bath Fill button”. Follow the voice prompt instructions.

When Water Smart / Bath Fill Operations Finishes

Once the “Water Smart / Bath Fill” operation finishes, the following
events will occur:

1. The flow from the shower / bath hot water tap will cease.

2. The “Water Smart / Bath Fill” button will flash.

3. The Kitchen Controller ‘Bath’ indicator will flash (Deluxe Models)

4. A tone will sound.

5. The voice prompt will say “Bath fill is complete. Turn off the

bath hot water tap and push the “Bath Fill” button.

Follow the voice prompts instructions. Note that the
hot water unit will not allow hot water to flow from any
fixture until the ‘Water Smart / Bath Fill’ button has
been changed.

6. The “Water Smart / Bath Fill” Button light on

the Bathroom Controller and the “Bath” indicator
on the Kitchen Controller monitor will go out.

COMBINING CONTROLLERS AND DELUXE CONTROLLERS

Controller and Deluxe Controller can be combined and will function as described in other
sections of this manual. Refer to the Temperature Table page to confirm the maximum
number and combination of controllers that can be fitted to all water heater models. When
using two Deluxe controllers, only one Controller MC-100V-1US can be installed.

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V3237 Models