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- Sunmaster Flat Plate System
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System has a frost protection value that has been leaking at ~12 deg. Service call placed, technician visited, said they needed to order a replacement part. Technician assistant then called afterwards to say Rinnai rejected the change and that we were liable for the visit. Called Rinnai to understand technical operating limits for the frost valve, told they could not help me due to computer issues, got put through to their technical department and asked where I could reference the information, was told it should start operating a 4deg and th...en stop at 6deg. Asked for owner reference information and I was told it was internal knowledge only. Went back to customer service, computers still down, no offer to call back, I was told to email to escalate. Customer service people were rude. Simply not good enough. Date purchased is when new house was first occupied.
Solar hot water does not save money bad water pressure after install
We have a new home . Builder installed Rinnai sunmaster SG215 with gas booster. The water pressure from garden tap is excellent . The pressure inside our house is very bad , when I have a shower and my wife turns the hot water tap in the kitchen or anywhere in the house the pressure is reduced . It takes 15minutes to fill the washing machine.
We have spoken to a person at rinnai and he said thats normal .He told us that the flow rate should be not be less than 9lts a min. Which is what we are getting. We have had plumbers out to see if they co...
System works well when it has no faults! Minor problems I've had to date: Plastic non return valve built into system melted - not rated to handle the high temperatures (replaced with a 250deg external one). Bleed valve on collectors failed - replaced - expensive for what it is - bad design - needs to be more than what looks like a bicycle valve!. Hot sensor failed (three times open/intermittent) so pump runs at night cooling the hot water - defeats the purpose of solar hot water. Technical documentation regarding sensors (are they PTC or NTC & resistance change per degree of temperature) non existent and not forth coming from Rinnai (very frustrating) just buy an expensive new one from Rinnai! +$40, for a 50cent part!
Pump runs nearly continuously
Too scared to call in a technician because of all the complaints and horror stories about the Rinnai Sunmaster tank system. Neighbor just replaced a Solahart rooftop system after 20 years uninterrupted service. Wishing we had done the same. Considering replacing the rattling pump and setting up a timer, but it sounds from another review like the tank may rust out prematurely too.
Pump runs continuously
Pump runs continuously day and night, technician has been out and replaced the controller component, pump still running day and night. Technician is back today. Haven't heard outcome of today's visit yet. It seems as though this is a common problem with this unit, when I spoke with rinnai though they denied this was a common issue.
Similar Problems to others - unreliable
First, my Rinnai Sunmaster system kept turning on and off at night, cooling the water that had heated during the day - this MUST be a design fault. To defeat this, I put a timer on the pump connection. Also, after about 2 1/2 years the pump started making a rattling noise and not pumping properly. Rinnai offered to come out and "look at the problem" for several hundred dollars, even though this is, obviously, a common problem with the pump - to the extent that there's an "improved model". There should have been some sort of recall for the two c...ommon issues affecting these systems. Actually, in hindsight, in Melbourne, it's better to invest in a heat pump hot water system to run off your solar and get zero cost hot water all year. I'm sure there are solar hot water systems that work better than this one, though.
Loss of Hot Water Pressure returned
Hi I just thought that I would add this to the forum.
We have a Rinnai Sunmaster flat panel solar system and over the last approx. 2 years when we turned on the hot water anywhere in the house there was very low pressure We had plumbers come out they did what they do and went away sometimes the water pressure would be better but if it was it would not last.
Any way just last week I found Celsius Heating & Cooling here in Ballarat I believe they are service people for Rinnai anyway they had a contractor by the name of Phil he came out listened...
Solar hot water
Never buy one these stay away from rinnai ... during winter no hot water .. summer hot during day then cold in morning old solar hart had no problems for 25 years ... got bigger one for bigger family ... now been through 6 heater elements over 3 winters ... just blew another one then would like find the guys house who sold us this so i can go dump it on his lawn
Problematic At Best
A new Sunmaster with evacuated tubes, no older than three months started to fail about 2 weeks ago and the installation plumber had a shot at repairing it but only made it worse. Started with the hot water spitting pretty violently and has now reached the point at where there is pretty much no flow at all. Called Rinnia service who subsequently called an agent who said we would have to wait 2 days for a service call. That will mean we are 4 days without hot water. I used to have a high opinion of Rinnia but would now like them to remove the system and will be asking them to do so, it is clearly not fit for purpose and their service arrangements are far from optimal.
My Rinnai Sunmaster, what a waste of money
I installed a Rinnai Sunmaster in April of 2011and monitored its performance carefully since, over the cooler months March to November its contribution to household hot water ranges from mediocre to non existent due to the early activation of the frost protection system (FPS) which effectively turns the unit into a water cooler overnight whenever the temperature falls to 10 degrees C and under. Rinnai's resident engineer Mr [Name Removed] visited my home and tested my unit and found it was operating precisely to specifications, he agreed with ...my findings that the FPS activates at 10 degrees C and not at 3 degrees as Rinnai quote and it cannot be adjusted [Name Removed]quoted OFF THE RECORD that the unit was unsuitable which means that there are 1000"s of units in southern Australia similarly effected but going undetected because of the gas boost. Rinnai's official stance is that it is that it is suitable. Rinnai quote overnight tank heat loss at under 1% .yet I've detected losses of up to 65% warm enough to use at dusk to cold to use at dawn, by contrast its summer performance is excellent. My attempts to raise the matter with MPs have been futile. My conclusion install glycol roof panels or evacuated tube variants and avoid any unit with water running through its roof pane, my unit was a waste of both my and government money.
Rinnai sunmaster 315 - rusted out tank
My rinnai 315 sunmaster tank has corroded out. 5 years 2 months after install. Warranty is only 5 years. Rang rinnai to get their help - hoping for some goodwill support, maybe a discount on replacing it. Too sad, too bad mate, nothing we can do. The tanks are made in china - the vitreous enamel lining would have been poor quality - and it rusted out well before it should have. My last aussie made tank lasted 17 years. Same water quality, the only thing that has change is the poor quality materials used by rinnai. Now $1780 to replace the tank. That's $350 a year for 5 years. Would have been cheaper to forget solar all together, just pay the power bills, and have a hws that lasts for 10 years or something.
Poor quality system
Purchased gas boosted system 2009,cold showers in winter(be warned)overheats summer months spewing hot water out of the relief valve(unsafe). Unreliable and exspensive to fix.Next door installed at the same time and has had the same problems. The gas booster works poorly as the water is never hot just luke warm.
Cold showers during winter(temp set to low,fixed cannot adjust ) bad engineering,quality,unreliable .
I had a similar experience as Chris. Quoted $690-00 for a replacement pump (labour cost $250-00 ) total $930-00. hunted round lowest price for the pump $530-00 inc GST. I have since found that a identical pump can be had for $196-00!!!!!!!!!!!!! I changed to Solar HWS to save money due to everincreasing power cost. & green house gas emissions In my opinion it would have been cheaper to stay normal HWS as the intial purchase cost plus the rip off price for a simple pump replacement far exceeds the benefits!
Very expensive maintenance
After 2 years the pump has gone and they want to charge a fortune to have it fixed. A pump should be longer than two years, considering the expense of these products. Understand the 10 year warranty isn't valid for the pump (which has 2 years) but had no compassion from them, it's more just tough luck. They want to just bill you for the pump, plus $176 for the first 45 minutes, then $33 for every 15 minutes. Not a great way to treat a customer.
Pumps don't last.
Unreliable solar hot water system
Prior to Sunmaster solar system-gas boosted installed in October 2009, I specifically requested a frost-friendly system and was assured it was frost rated. Stopped working July, 2010, September 2010, July, 2011, July 2012. To date I am still waiting 6 weeks later for the system to be repaired with frost-rated panels. Each time the panels or valves have cracked due to exteme cold weather, water pours off my roof and into the gutter - wasteful and expensive. This system is under warranty. The gas boosted hot water is efficient but never feels...hot enough, apparently set to 60 degrees. Not good enough for a solar system which cost almost $6000! When operating in summer it is energy efficient System stops operating beginning of every winter since installation (3 years). Very frustrating.
Questions & Answers
Hi I have a rinnai Sun master s20 hot water tank.
Is it normal for the hot water pressure to be half as much as the cold water? As you go from cold to really hot the pressure is substantially less
Thank you for the question. We would recommend contacting our experienced technical help desk on 1300 555 545 option 3.
I have a Rinnai Sunmaster Flat Plate system installed in 1999.
What is the life expectancy of this system
Thanks for the question, in 1999 when your unit was installed Rinnai offered a 5 year warranty on the Sunmaster tank. However, Rinnai Australia are committed to continuous improvement and through innovation have enhanced the efficiency of the Sunmaster Flat Plate System which has sanctioned an extension of the warranty from 5 to 10 years on the Sunmaster tank.
If you are having trouble with your unit we would recommend booking a service call. Please refer to our website with the following link https://www.rinnai.com.au/support-resources/online-service-booking.
That does not really answer my question!
The unit is currently working fine,what I am asking is how long would you expect the unit to last! Ie life expectancy.
We cannot provide an exact age for life expectancy, due to a number of factors. Actual life can be impacted by water quality, usage and improper maintenance.
It is recommended that our customers regularly service their products to ensure optimal operation.
If you would like to organise a general service, please refer to our website with the following link:
Please let us know if there is anything else we can help you with.
Good Morning, we had this unit installed in our new build by our plumber in July last year (2018). Our gas bill is astronimcal all year round, $700 after discount during winter and around $400 during summer when the Hydronic isnt running. Is this normal as the only other gas device we use during summer would be the cooktop two or three nights a week? We have noticed the instantaneous running a lot,even during summer.
Hi Michael V,
Thank you for your question.
We would recommend contacting our technical help desk on 1300 555 545 Option 3 for detailed information in reference to the function of the hydronic system.
Alternatively, you can email the technical help desk on email@example.com
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