You can also see heating cycles of Sanitary water and Cooling water in the 24h period. While you can adjust the thermostat to any temperature without increasing the energy used, keep the heat pump set at a constant temperature. I live in Texas. The higher the COP, the more efficient the heat pump. The output temp was measured at a supply grill not far from the air handler. So I was under the assumption the next time it would kick on, 80 degree air would come out. At any rate, like the others have mentioned, treat a heat pump in cooling mode the same as a regular A/C. Two possibilities can be considered: Active cooling When the temperature in the house drops approximately 2 degrees below room temperature, supplemental heat comes on to assist the heat pump (usually in the form of electric resistance heaters). With all ductwork in conditioned space and return air temp at 70F, a standard heat pump with air handler set at ~400cfm/ton will have discharge air temperature of about 97F at 47F outdoor, but only about 86F at 17F outdoors. All the thermostat does is turn the unit on when heat is required, and turns it off when the setpoint temp is satisfied. Second: Are you using an accurate digital thermometer, and placing it at the register? While the initial cost of ground source is higher, it also pays for itself faster. Al continuar en este sitio o utilizar esta aplicación, acepto que el grupo Houzz pueda utilizar cookies y tecnologías similares para mejorar sus productos y servicios, ofrecerme contenido relevante y personalizar mi experiencia. If your heat pump is not keeping you comfortable in your home, contact your licensed professional HVAC dealer for an inspection to determine a solution for your heating or cooling concerns. Let’s consider one of our standard model of heat pump Thermagen2X 8028A. If you’re not sure you have a heat pump, start with step 1. The unit cycled off at 2:55 AM, so it ran right at three hours to recover from ~62°F to 70°F, with no auxiliary at 30°F ambient. A heat pump drawing heat from a ThermalBank at 25°C can provide very effective heating to an underfloor heating circuit designed to operate at 35°C. but if the room is only 55 degrees when the strips kick in, you still aren't going to get above 75 degrees or so. It is still considered mandatory to light the large wood stove if the temperature will get below 0. Heat Pump Calculator 2. heat kicks in. It is always better to have the system installed during the time of the build. My father has a 10 year old 12 seer Trane that is putting out 95 degree air. There is absolutely something wrong with this unit. Laurelview,we normally tell our customers with heatpumps to leave the t_stat set at a given temperature and let the heatpump heat the structure.That keeps the heatstrips from coming on as much and saves money on electric bill.If you have gas backup( which we call a pickyback) that would depend on your gas rates.Our gas rates are very high here now, so electric heatpumps are cheaper.The system will try and satisfy the T-stat with both the aux and the heatpump when you initially turn it on with a 3 or 4 degree setpoint above room temp.Amyspaetzle,I am a Trane dealer and sell alot of 14i heatpumps and I can tell you you need to call Trane directly since you are not getting anywhere with your Hvac company.You most likely have a system that is improperly charged.They probably are not very well trained on the new 410a refrigerant. heating water temperature sufficient heat output from heat pump high temperatures of heating water needed, which couldnt be supplied by heat pump… The optimal heat pump temperature range is above 25-30 degrees Fahrenheit. Vancouver BC is seeing summers with 30 C. I rent a 50's "hot box" that hits 29 C by 9pm (yes...it keeps getting warmer after the sun goes down...awesome insulation...not). also it depends on the volume of air in the unit. Anywhere from 15 to 40 degree diff. A little post service call update.I was told the heat pump was a little over charged. You may need to extrapolate to be accurate within the body of the table (for example, if you have an entering air temperature of 73F, and the table only provides for 70F or 75F). Most heat pumps produce a heat output of close to their "tonnage rating" at the 47°F AHRI rating point and approximately half of their "tonnage rating" at 17°F. So, a few days ago, when it was 12F outside, I used my IR gun to check some of the unit's surfaces, immediately next to the air outlet. It is 31 degrees outside. Clay, I have had a Fujitsu ductless minisplit for about 3 years and I had a conventional, ducted heat pump before that. I got home at 1:45 AM, the unit was still running, inside temp up to ~68°F. How to Get the Necessary Field Test Numbers. F I get air out of the vents that in the 100 to 105 range. He didn't sound too alarmed and I got the air from a heat pump is never as warm as natural gas lecture. Heat pump is not suitable for cooling with water temperature under condensing temperature e.g. Theheating seasonal performance factor (HSPF) is a measure of the total heat output in Btu of a heat pump over I have a Trane XL12, and even on days when it's close to 32 deg. What happens if the ambient temperature drops below 20°C? Suitable cooling system cooling ceiling, The opposite for a cooling process - a lower cold temperature will increase the efficiency. Heat Pump, Air Source Heat Pump, Heat Pump System manufacturer / supplier in China, offering 25 Kw Low Temperature Air Source Heat Pump Heating Cooling, 22.3 Kw Input Ground Source Heat Pump… There were no dark marks in the insulation so I assumed no major air leaks.The ductwork in the slab....who knows? With a variable speed compressor and variable speed air handler heat pump system (such as a ductless mini-split), the discharge temperature is going to vary a lot...based on outdoor temperature, compressor speed and air handler speed. Now a "hot day" is 31-33 C and these are happening multiple times per year...and we are getting WEEKS of 28C - 29C. We like to sleep cold so turn the unit off at night. If your heat pump is not cooling, it may be one of a few problems, most of which are similar to those listed above. although if the unit is on a slab, I highly doubt the ducts are in the slab. If you home is less than $300K, you can probably skip it (that will buy you a 2 bed condo which doesn't let you have AC)... no where in Vancouver can you find a home for less than $900K (Vancouver proper)...so I'm guessing you will want to add it. Something is wrong with your unit. "Effective" down to -13 doesn't mean efficient. If the difference is high, the heat pumps need to add more work to deliver the required temperature output. The inclusion of heat pumps in classes according to energy efficiency: Can I make mini splits more efficient at extreme temperatures? the low temp in fl is maybe 50 degrees, in oh with 38 in oct, a heat pump is doing practically nothing. The air coming from the supply grilles and registers will be only 15 to 30 degrees warmer than the air in your home. Become a GBA Prime member and get full access to GBA articles, enyclopedia, videos, CAD library, and more. I hope there isn't a small leak as it shouldn't drop at all in 3 years, right? Heat pump not cooling. I have a 25HCB636A300 condenser with a 4 ton coil. They checked out the work and said everything was functioning correctly. My Fujitsu mini-splits, set at 68 F, kept my house at 68 F last night, when the low temp was -6 F and the night before, when it dropped to -4 and didn't get above +6 all day. The above assumes no auxiliary heat strips or other supplimental heating(dual fuel) being activitated which would raise the temperature output. The Trane wholeseller usually has a residential specialist on their staff who might offer suggestions. You should be getting a supply air temp in the 90s,period without heat strip operating. One solution to your problem would be a variable blower motor controller such as the Fanhandler (see link below). THE OUTPUT TEMPERATURE AT THE VENT CLOSEST TO THE HANDLER IS 78 DEGREES WITH JUST THE PUMP RUNNING. and explained the air coming out is only 72 degrees. Heat Pump operation.Location of measuring thermometers: Thermometer in hot air register immediately next to the furnace about 2 feet from plenum. Remember, the higher the hot water production and demand for heat, the lower the efficiency of the ground source heat pump. The heat pump is mostly used for cooling and only for heating down to around 35 degrees Fahrenheit, any colder than that and it becomes ineffective and the electric furnace switches on. Any suggestions what could be wrong? So, if your house temp was 50 degrees (burrrr) then the heat pump might only produce air that is 72 degrees. I refuse to pay for another service call and have to get the same company out to fix what they installed in the first place. Your installer should verify the charge in the heat pump and the compressor. We also turn the unit off during the day when at work. thanks gang. At cooling mode is output water temperature limited to condensing temperature. First: The air temp coming out of the registers is not a function of your thermostat. When the outside air temperature is very low, an auxilery electric heater must be used to supplement the heat pump's output. If you really are discharging 72 degree air, then no - that's not normal. Keep your thermostat at a consistent and comfortable temperature. Passive Solar Cabin wiith Heat Pump at 46 N Latitude. During cooling it should reduce the intake air temp 20+ degrees and during heating should raise it a similar amount. Out and you set the thermostat to call for 70degF hydro-air systems do quantify! Am, the unit may run continuously for several hours, of course, the heat! Am temp was Measured at a very low, an auxilery electric must... Not take the tech or cooling … hey buddy ideal air volume is typically about 400 per. Determine temperature rise at lower outside temperature is 43 degrees and inside temp 68f indoors the Mitsubishi running max. 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