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7

Warning! 

-Do not attempt to do it 

yourself. 

-Severe burns can occur if no 

specialize equipment are used 

-Improper chemicals can harm 

the water heater and/or the 

plastic and rubber parts 

rendering the warranty void.  

 

Operation.  

 

-Open the gas valve 
-Open the water valve 

-Install 2 fresh Dcell batteries  
- Check for gas and water leaks 

Warning: 

 
Do not check the gas leak with open 

flame. Severe burns and/ fire can be 
produced in case of gas leaks. 

 

Adjust the gas knob to maximum 
-Adjust the water Knob to maximum 

volume 
- Open a water faucet as close as possible 

to the unit.  
If the unit do not light up then shut up and 

start again 

Warning: 

 

In order to evacuate the air from the 

gas line it may be necessary to repeat 

the operation 3 to 5 times based on 

the length of the gas line. 

 

- As soon as you see the unit light up leave it 

to run for at list 5 minute. 
- Check the temperature of the water:. 

- If the water is too cold your water volume 
is too big. Need to reduce the overall water 

flow thru the unit to 12 liters per minute or 

until the temperature of the resulting water 
is acceptable.   

If the water is too hotreduce the gas flow 
from the Gas Knob  

-Repeat the procedure with at list 3 to 5 

minute time in between to leave time for the 
“new” water to reach the faucet and the 

pipes to reach the temperature of the water. 

Warning:  

-Use only small increments by dividing 
the scale on at list 6 segments. Small 

increments make big differences.   

 
Once you achieve the desired temperature 

you do not need to thatch again the dials. 
The fine tune adjustments are made by 

mixing your hot water with cold water at the 

faucet 
 

Warning: 

 

If after 5-10 minutes the unit suddenly 
shuts-up a overheating problem exist: 

The unit  go over 140F and the unit shuts 
up. 

 

The unit will not start before you close 

the faucet and reopen again.  

 
Fix: Dial back the gas knob a 1/6 of the dial. 

 

Also it can be problem of interaction 
between the instantaneous water heaters 

and “water savers”  
 

Summary of Contents for OME 412

Page 1: ...mation and instructions in this manual is not followed exactly a fire or explosion is possible causing property damage personal injury or death Warning Any Gas appliance creates flue gasses carbon mon...

Page 2: ...92 000 Btu Gas Connection NPT Water Connection 3 4 NPT Water pipes location On the top of the unit Water Pressure Min 19 psi Max 150 psi Recommended 55 psi Natural Gas Pressure Inlet Min 0 33 psi Max...

Page 3: ...sal The Discount tickets They are also 2 mounting brackets taped on the back of the unit Safety Talk 1 Always follow all local codes or in absence of local codes follow the actual edition of National...

Page 4: ...r heater 7 Operation OME 412 is a instantaneous thankless water heater designed to efficiently supply domestic hot water We combine the principle which is been around from the beginning of the 1900 wi...

Page 5: ...adiant temperature on any place on the unit is under 100 F so the possibility of Fire by contact is eliminated Freeze Prevention We see no reason to install your water heater outside OME 412 is been d...

Page 6: ...meter You can use your old flex hose if is sufficient long and at of list diameter Warning Your line has to have a pressure of minimum 0 33 PSI and the capacity to move a sufficient quantity of gas to...

Page 7: ...the water If the water is too cold your water volume is too big Need to reduce the overall water flow thru the unit to 12 liters per minute or until the temperature of the resulting water is acceptab...

Page 8: ...0 86 91 96 101 106 111 4 75 84 89 94 99 104 109 The result for Output temperature was reduced to 130 Degrees by the temperature safety devices anti scalding device included in the design of the unit T...

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