RATING PLATE  
 
 
 
 
Pressure relief Valve 
             HOT        COLD       GAS 
 
 
 
 
GENERAL 
 
The MOBIUS Water Heater is an 
instantaneous, tankless water heater designed 
to supply endless hot water to your entire 
household and/or commercial hot water needs 
utilizing total efficiency. The principle behind 
the MOBIUS Water Heater is simple. Once you 
open a hot water tap, water flows through the 
MOBIUS Water heater. Once a minimum of 
0.75 GPM is achieved the flow sensor  
automatically commands the computer to 
electronically turn on the fan, activate the 
electronic igniter and open the gas valve the 
computer monitors the water temperature, 
water flow rate, and gas flow the insure you get 
the right amount of hot water with the correct 
hot water temperature. After the burners are 
ignited the “fire on” lamp is lit. Computer will 
modulate gas supply to valve and water flow. 
0.75 gallons per minute is required to turn the 
burners on, after the burners are ignited, the 
flow rate can be lowered to 0.6 gallons per 
minute to maintain and still keep the heater on. 
It is advisable to increase the cold tap rather 
than decreasing the hot tap to adjust the water 
temperature. Now as long as you have water, 
gas and electricity, you will get an endless flow 
of hot water. Open a hot water tap to turn on 
your water heater. Close the tap to turn off 
your water heater. 
Temperature 
 
The temperature has been set at the factory 
Max. of 140º F (60º C). The computer will 
electronically control this temperature. Mix the 
cold water with hot to get the water 
temperature you desire. If desiring hot water 
temperature want other than factory setting 
temperature (140ºF), please purchase the 
optional temperature remote controller, part No. 
TM-RE10. With this optional part TM-RE10 you 
can set the temperature from 95  º F to 176 º F, 
please carefully read the instructions prior to 
installation, failure to do so can damage the 
temperature controller and/or the water heaters 
onboard computer, which will void warranty. 
 
 
WARNING:  Temperatures above 125º F (52º 
C) can cause severe burns or death from 
scalding. Children, disabled and the elderly are 
at high risk of being injured. Feel the water 
temperature before bathing or showering. Do 
not leave children, disabled and the elderly 
without supervision. MOBIUS water heater will 
produce hot water based on setting 
temperature. Please refer to the temperature 
and gallons per minute chart on the back of 
this manual for your convenience.