Rinnai BC 70 2A, MC 70 2A, MC 91 1A Installation And User Manual

Rinnai

Rinnai

Installation and User Manual

for

for

Controllers

Controllers

BC 70 2A

BC 70 2A

MC 70 2A

MC 70 2A

MC 91 1A

MC 91 1A

TEMPERATURE CONTROLLERS - GENERAL

When deciding on the best position for the temperature controls, the following points
should be taken into account.

• Fit the controls out of reach of children. (suggested height from the floor 1.5m)

• Avoid positions where the controllers will become hot e.g. near stoves, ovens

and heaters.

• If possible, avoid exposure to direct sunlight or positions where bright lights will

make the digital display difficult to read.

• Position away from areas where the controller will be prone to splashing by

cooking products such as oils and fats.

• The temperature controllers are water resistant, however they should be

positioned away from areas where direct or persistent splashing could occur.

• Refer to the I.E.E electrical wiring regulations current edition for location

requirements in shower and bath areas.

• The cables to the temperature controller carry only 12VDC (extra low voltage)

• Cables should run back to the

Infinity

Infinity from the temperature controller or

cables should run between the controllers then back to the heater. (Parallel
connection).

The installation in every application will vary, therefore the temperature controller cable
has been provided so that you may cut the length accordingly and fit the spade
connectors, ensuring a good connection.

Cables are simply ‘piggy-backed’ at the

Infinit

Infinity or at the primary temperature

controller. Polarity is not important when connecting the cables, either colour wire can
be connected to either terminal at both the heater or primary temperature controller. If
more cable is needed any cable with similar specification to the cable supplied with the
controller can be used. Maximum length is 50 metres.

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TEMPERATURE CONTROLS - GENERAL

Connecting One or Two Controllers

1. Isolate the power supply

2. Remove the front cover from the Appliance (4
screws) fig. 1.

3. Thread the cable(s) through the cable access
hole at the base of the appliance.

4. Connect the spade connectors to the terminals
marked "Remote Control" on the printed circuit
board (fig.2). Polarity is not important. Either wire
colour can be connected to either terminal.

5. Replace cover of the Appliance. Ensure that the
screw with the star washer is placed at the
bottom right hand corner for earthing purposes.

Connecting Three Controllers

1. Isolate the power supply

2. Remove the front cover from the Appliance (4
screws) fig.1.

3. Cut the spade connectors from 2 of the controller
cables to be connected to the appliance (4
spade connectors should be cut off) and discard.
Connect the wires from these two cables and
terminate into two new spade connectors as
shown in fig.3. Spade connectors are available
from your local electrical component retailer.

4. Thread the 3 cables through the cable access

hole at the base of the appliance. Connect the 4
spade connectors to the terminals marked
"Remote Control" on the printed circuit board
(fig.2). Polarity is not important. Either wire
colour can be connected to either terminal.

5. Replace cover of the Appliance. Ensure that the
screw with the star washer is placed at the
bottom right hand corner for earthing purposes

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TEMPERATURE CONTROLLERS

The purpose of the Temperature Controllers is to en able the user to have complet e control over the
hot water unit. Used correctly, the hot water unit will supply hot water at the temperature selected,
even when the water flow is varied, or when more than one tap is used. Adjustments to the operation
of your hot water unit can be made with any of the Temperature Controllers. Each Temperature
Controller can be individually programmed.

Various water temperatures (°C) can be selected as follows:

Kitchen Controller:

37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50, 55°C* ( 60, 65°C HD )

Bathroom Controller

Hot Water Delivery: 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50°C

Bath fill Delivery: 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48°C

If a temperature 43°C or higher is selected on any Controller and this temperature is then decreased
to below 43°C and increased again whilst the water is running, the maximum selectable temperature
will become 43°C. This provides additional safety for the consumer.

Suggested temperatures are:

Kitchen 50°C ~ 55°C* ( 65°C HD ) Shower 39°C ~ 43°C Bath fill 39°C ~ 45°C

* This temperature may not be available on all installations

These temperatures are suggested starting points for selection. You may find higher or lower
temperatures are more comfortable. Maintaining lower temperatures helps to save energy. To obtain
water temperatures lower than 37°C simply add cold water.

Temperature Controllers are an optional extra. ‘Universal’ and ‘Deluxe’ Temperature Controllers
can be fitted. Universal Controllers allow temperature selection only. Deluxe Controllers have
temperature selection, bath fill and clock functions.

Temperature Controllers allow the temperature to be set from various locations. The temperature
selected will be available to all outlets.

Controller Options

Water Heater Model Controller Options Kitchen Bathroom 1 Bathroom 2 Bathroom 3

Infinity 26i or 32e

HD50i or HD70e

Note: The maximum available controllers configurations are shown for each model.

† When 3 deluxe controls are installed the option of adding a 4

* When a MC-91-1A Temperature Control is used for this application the installer may set this unit as a master controller.

Deluxe Option 1 MC-70-2A BC-70-2A BC-70-2A MC-91-1A †
Deluxe Option 2 MC-70-2A BC-70-2A MC-91-1A MC-91-1A

Universal Option MC-91-1A * MC-91-1A MC-91-1A MC-91-1A

th

controller is only available on the Infinity and HD models.

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UNIVERSAL TEMPERATURE CONTROLLER

Universal Temperature Controller (MC-91-1A)

Temperature Controllers are not required to operate the applia nce they are a feature that provides control
of water temperature.

Rinnai Infinity and HD water heaters can be operated with 1, 2, 3, 4 or no Temperature Controllers.

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,

OPERATION WITH UNIVERSAL TEMPERATURE CONTROLLERS

Using 1 Universal Temperature Controller

Press the ON/OFF button on the Temperature Controller.

The ON indicator will glow on the Temperature
Controller. This indicates that the hot water unit is
ready to supply hot water when a tap is open.

Adjusting Temperature

Simply press the HOTTER ∧ or COOLER ∨
button until the required temperature is displayed
on the Digital Monitor.

To operate the hot water unit, simply turn any hot
water tap on. This will automatically light the
burner providing hot water. The red IN USE
indicator will glow on the Temperature Controller.

If the set temperature is either to hot or cold Press
the HOTTER ∧ or COOLER ∨ button until the
desired temperature is reached

CAUTION

NOTE

CHECK WATER TEMPERATURE BEFORE USE.

A parent should always check the temperature before a child is placed in contact with hot water

Consumer safeguards: With the hot water tap open and a temperature of 43°C or higher selected, if the
temperature is decreased to below 43ºC, and then raised again th e maximum available temperature
will be 43°C

.

in addition temperature ‘priority’ cannot be transferred betwee n contr ollers.

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y

OPERATION WITH UNIVERSAL TEMPERATURE CONTROLLERS

Using 2 or more Universal Temperature Controllers

Switching the System ‘ON’:

The hot water system and all controllers can be switched ON
and OFF from any controller by pressing the ‘ON/OFF’
Button as shown. When the system is turned ON the water
Temperature display will be lit. During normal operation the
system is left ON.

Using Hot Water

Ensure the system is switched ‘ON’.
When the system is ON, the temperature
displays will be lit. Confirm that the transfer
on indicator is lit. If not press the TRANSFER
button once. This will transfer priority to this
controller which will then have control of the
water delivery temperature.

Select the desired temperature using the ‘hot
water temp’ buttons. The selected temperature
will be displayed on all controller monitors.
This is the water temperature which will be
supplied to all outlets.

NOTE

Temperatures no higher than 50ºC should be able to be selected on controllers installed in bathrooms,
ensuites or toilets. This is to help reduce the risk of burns from hot water. If this is not the case, the
controllers have been incorrectl

installed. CONTACT YOUR INSTALLER.

Open the Hot Water Tap.
The appliance will be activated and the

HOT

COLD

‘in use’ indicator will light up.

Consumer safeguards: With the hot water tap open and a temperature of 43°C or higher selected, if the
temperature is decreased to below 43ºC , and th en rai sed ag ain the maximu m avail able temperatu re will

NOTE

be 43°C, in addition temperature ‘pr iority’ can not be transferred be tween con trollers.

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TEMPERATURE CONTROLS—PROGRAMMING

Q: Are Four temperature controllers fitted?

If Yes.

You will need to activate the fourth controller.

STEP 1: For the Primary controller only press and hold the ‘Transfer’ and ‘On/Off’
buttons simultaneously (see fig 2.) until a “beep” is heard (approx. 5 seconds)

STEP 2: Check that the display on all Four controllers is lit and
displaying a temperature when switched on. If any ONE of the
controllers displays two dashes (see fig 1.) in the display repeat
STEP 1.

This completes the activation procedure for this configuration.

If No. (You have three or less controllers)

You will need to program the primary controller to enable the selection of temperatures
higher than 50ºC.

STEP 1: For the Primary controller only press and hold the ‘Transfer’ and ‘On/Off’
buttons simultaneously (see fig 2.) until a “beep” is heard (approx. 5 seconds)

STEP 2: When the Primary controller is switched on it should be possible to select
temperatures higher than 50ºC. If not repeat STEP 1.

Note:

If the primary controller is replaced, repeat STEP 1 above for the new controller.

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