Joined on February 2, 2013
Last Post on January 4, 2014
@ January 4, 2014 2:21 PM in Combi boiler dhw and heat or dhw or heatSo far no major complaints ( Knock on wood) the house is 2200 sq feet and 2.5 baths. Currently we have the DHW set at 120 and the heat to 180 with the unit running on low temp. I am tempted to switch the unit to high temp because when it gets single digits or below zero the system is always running and it hard to maintain the house at 72. Usually on a single digit day the house is at 68 with the temp set to 72. Single pane windows do not help and we use to have oil and we do not have enough base board and when I made the switch I did not note what the temp was set too. The only other issue is during the warmer months that we experience cold water sandwich. But that could be solved by installing the remote or switching the pre-heat switch. I prefer to save on the gas and let the water run a little Annoying sometimes it like half of a bathtub of water.
@ December 18, 2013 7:01 AM in Combi boiler dhw and heat or dhw or heatHello
Last night I noticed when my wife was washing the dishes with hot water and the dishwasher was running. I was downstairs the basement and I noticed that the supply temp drop down to hundred and 20° which is what the dwh is set too. I noticed that the pipes for the baseboard he became very cool even though the system was calling for heat. Once she shut off the hot water the supply temp jumped back up to hundred and 60 and the baseboard Became hot again. Is this normal does this systems only can do one task at a time they can't keep the house and generate hot water at the same time? The product is a Navien ch240a.
@ May 12, 2013 9:55 PM in Hot water recirculation do they save money?So far I like the system I normally get hot water in about 5 to 15 seconds not sure that is good or bad the temp is around 90. The only annoying is at least once day I get a cold water sandwich and it takes at least 60 seconds for the unit to kick in, i am assuming the small storage tank would solve that as you mentioned. I have also heard people state that i could set preheat but that just bugs me to have the unit running during that that time especially if no one takes a shower at that time. What temp should the aquastat be set too? How much more money am I burning with this feature?
@ May 12, 2013 2:33 PM in Hot water recirculation do they save money?Pump is on the left of the unit.
@ May 12, 2013 11:54 AM in Hot water recirculation do they save money?Hello
I have done some research on this topic and their seems that some people agree it does save money do the fact your not wasting water, other seem to think your wasting energy because the system is keep the water a certain temp. I got one installed and did not want it installed but their was confusing of the options that were presented. I have noticed that when I shut down the recirulation pump the water temp jumps up to 140 degree and then quickly goes back down to 120. With the pump on the water instant at 99 degrees and never jumps over 120. My DHW is a navien ch240 that is set to 120 for DHW. My concern is that I spending more money just to have instant hot water. I know it's better than heating 50 gallons..
I have also heard that these systems cause Corrosion-erosion within the copper pipes has anyone experience such an issue?
@ February 27, 2013 12:58 PM in DHW recirculating pump & Circulator Remote Bulb Aquastat,Hello
Sorry for the newbie question but what function does a Circulatory Remote Bulb Aquastat do with a with hot water recirculating pump? I have this gray box with a dial on it that is connected to my hot water pipe and I have no idea what it does.
@ February 25, 2013 7:21 PM in Navien 240Hello
One more question my system has how water recirculating pump does help or should I still turn on the preheat? I should mention that it has thermostatically controlled pump ( i think there is box that is connected to the pipe with a romex wires connected to it) and the high temp board is set to low temp and dwh is set to 140. I will be setting the dwh down to 120 I think this is the cause the issue. I have seen this issue start right after the high temp board was installed and I was told that dip switch 7 and 8 was for hot water, which as you know on the high temp boards switch 8 is high temp and low temp setting. I also learned that if you have high temp set then you must have remote installed to controlled dhw. If I turn on the preheat how much more enery will that use?
@ February 24, 2013 9:41 AM in Ch240 remote installThx for the advice great info I have not had a chance to get the connector or outside sensor. As for the heat loss calc I would assume yes but you never really know. The house is baseboard heat and their seems to be enough baseboard. As for the fumes I have one hardwire CO detector with three feet of the unit, a battery CO within 10 feet and a gas and CO detector within 20 feet none of them have gone off. Could a gas leak outside affect gas composition? I have had three leaks by the union joint before the meter, I hope that issue is finally resolved. To say the least it has been a real experience converting from oil to gas. I will try to take a few Pic today.
@ February 23, 2013 3:10 PM in Ch240 remote installSo the house is built in 1984 so I am assuming it has insulation in the walls, it does have insulation in the attic The house is 2200 sq feet two floors and two zones. I have converted from oil to gas my system was installed by a pro. It has been a real experience to say the least the union joint outside by the meter leaked three times. The unit does a great job and I am happy with it but on single digit days the system struggles a little bit. I can not put the system at the high temp setting because the dhw goes up to 160 navien stated that I need the remote installed if it is switched to high temp. Also I can smell exhaust or a little gas once in a while if I am standing in front of the unit like with in a foot.
@ February 21, 2013 9:22 AM in Ch240 remote installHello
What advantages does outdoor reset provide?
@ February 20, 2013 7:35 PM in Ch240 remote installWould the make wire be in the unit and do you know how long that wire is?
@ February 20, 2013 5:58 PM in Ch240 remote installHello
I was wondering if anyone could walk me through installing the remote. Sorry for the newbie question. I open the box that the remote came in I see that it has a female connecter, is there a wire in the combi that is a male connector? I saw the wiring diagram but not sure if I need to run a wire or if there is a wire already in the unit.
@ February 16, 2013 1:55 PM in Navien 240Hello
Once in a while or I should say at least once a day we do not get hot water and it takes like a good two minutes before any hot water. What could cause this issue?
@ February 2, 2013 5:29 PM in Navien 240Hello
Your both on the money the plumber came out and installed the high temp board. The weird this is that the system starts at 180 and after a few minutes it sets the water temp to 160 then 150. Just weird to me because I am use to the older systems where that water tempter does not change. I was also told today that with these new condensing systems I should just set the indoor temp and for get it. Instead of turning down the temp when I am off to work and turning it up when I get home.
@ February 2, 2013 8:45 AM in Navien 240Hello
Question about my heating system on really cold days single digit day it takes a very long time for the house to come up to temp. The supply is set to 180 and it does start at 180 but them it seems that the system turns down the system down to 160 even thou the house has not reached the desired indoor temp of 72. I am use to the old style of boilers where the system turns and the water is set to 180, so is it normal for a condensing boiler to be running for longer periods?