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Since, your Rinnai Heater is Vent-free, it can not be converted to a Vented Unit. The design does not allow it. Even if you could, the efficiency rating would drop tremendously. Not sure that you'd want to do that, with the price of gas being what it is, now.
HI,Dear your rinnai 556 is not starting thats why it can not genrate the error code ,i advice you in this case you can not identifiy the exact problem. but i m trying to help you with my best tring:- What you need to do - Check the model number and serial number which are found on the data label located on the bottom of the right hand panel of the unit. Any Rinnai Energysaver Models RHFE-556T and RHFE-556FTRG Gas Air Warmers with a serial number contain the the year (YY) digits "00" to "07" may be affected. If you cannot read the data label or think you may have an affected model do not use the Air Warmer and inform anyone who may use the Air Warmer that they should not do so. Contact the Rinnai freephone helpline for further instructions, even if you have not experienced any problems
The helpline staff will validate whether you have an affected product and will arrange for a Gas Safe Registered Engineer to visit and replace the gasket in the air Warmer.
i hope this will be helpfull to you.
PLEASE DON'T FORGET TO VOTE ME.GOODLUCK..............
Next time you try your stove watch the flame. If the flame goes away and then the error code comes on, you have something wrong with the over temp circuit, gas or gas valve, If the code comes on and then the flame goes away you have a flame sensor problem.
I may not be much help here in the states but if you have the owners manual you will find a page that will tell you what the error code represents. Not knowing and unable to find the NZ error codes, most likely it represents a flame failure. You will need to remove the front cover and inspect the flame as it starts. If it starts and goes out quickly, you may have debris attached to the flame rod not allowing it to get the proper signal. Or you may have a spider web in your burner. These units are not eazy to repair and I strongly suggest you call a proffessional. Sorry.
gday nelson. if you check out the specs on the rinnai range you will find another one that will go straight in. if you buy new it will come with a new flue kit. as far as recomended installation heights most of them are quite flexible. i installed a second hand 403ft yesterday with the centre of the flue at 140mm from the floor. recomended in the instructions were 240mm. a mate gave me the heater and i just had to buy a flue kit as the old one was already too short. if you messure your flue from inside and send me the specs i can give you a more difinitive answer.
A code 11 also means that it might not be getting any gas. On thr right side of the unit you will find a small door. open it up and make sure the valve is in the open position. If it is, you should contact your gas company to come and diagnose what is going on. The Rinnai is not a do it yourself fix it type of heater.
This is a New Zealand model. There is no pilot to relight, the unit will cycle again when you stop and restart the unit. You will need to find out why you are getting this code. I would check out the venting system for blockage. Make sure you are getting gas. You may want to take off the front panel and look into two small rectangular holes covered by small metal plates to see if, in fact the flame is starting then stopping. I have seen many of these with spider webs inside the gas train and burners not allowing the heater to start. If you can get to the backside of the heater, you will see a rubber hose about 1" (US) in diameter. Remove it from the vent and see if the unit ignites. If it does, this indicates blockage in the outer vent passage. If not, you may need to contact a technician to investigate your issue.
page 35 of the following:
hope this helps