Installation manual

• Applicable Model

Remote Controller

Remote controller

RC-7649M

Noritz Tankless Gas Water Heater

• When changing the temperature, make sure to confirm with the customer that the temperature of

the hot water will be very high and that there is a risk of scalding.

• Water temperatures above 125°F can cause severe burns or death from scalding.

WARNING

Install the remote controller according to the instructions in the Installation Guide (p. 31).

• The Noritz Tankless Gas Water Heater can be programmed so that it will default to one of four tempera-

tures if the remote controller is removed (180, 140, 130, 120°F). To change the default temperature, the

remote controller must be initially installed, and removed after programming.

* Changing the default temperature setting:

1. Within the first ten minutes of connecting electrical power to the unit, but before pressing the

Power On/Off button, hit the up [ ] or down [ ] button on the remote controller. This will put

the unit into maintenance writer mode. If pressing either of these buttons does not put the unit

into maintenance writer mode, unplug the unit for sixty seconds and try again.

2. The maintenance monitor item number will flash on the display. (the initial item number will be “99”).

3. The up [ ] and down [ ] buttons can be used to change the maintenance writer item number.

4. Choose a temperature from the chart below and set the 14 and 15 maintenance writers according to

the chart. Pressing the Flow Meter Alarm Set button for 0.5 seconds will switch the indicated item

number from “OFF” to “ON” or “ON” to “OFF”. If the Priority lamp is flashing when an item number

is displayed, this indicates an “ON” setting for that item number, and if the Priority lamp is off, the

item number is off.

*Do not change the other item numbers. This may cause a fault in the water heater.

5. After setting the 14 and 15 item numbers for the desired temperature, press and hold the up [ ]

and down [ ] buttons together for five seconds to confirm the new settings. The remote control-

ler will emit a tone when the settings are confirmed. If this is not done, the unit will not put the

setting changes into effect. After confirming the setting, remove the remote controller to initiate

the default temperature setting.

Note:The setting changes can be cancelled by pressing the Power On/Off button before confirming the

settings, or if the unit is left alone for ten minutes without confirming the settings. If the default

setting needs to be changed again, disconnect the electrical power to the unit, reconnect it and

follow this procedure again.

* Factory Default Setting

180°F

140°F

130°F

120°F*

OFF

Temp.

OFF

Item No.