Question on Portable Heat Pump
BillyBobJo
12 years ago
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Comments (19)
veesubotee
12 years agolast modified: 9 years agodadoes
12 years agolast modified: 9 years agoRelated Discussions
Heat Pump Amp Draw Question
Comments (11)RLA is rated, and as mentioned above the circuit wiring is sized to 125% of this number. LRA isLocked Rotor Amps and is used to size the overcurrent protection for the circuit. When an induction motor start up it pulls current that easily approaches the LRA since the rotor is not turning yet. This is often the cause of the dimming in other lights that briefly occurs when the unit starts. If the POCO feed does not have enough excess capacity, the voltage falls slightly for a few cycles of 60 Hz until the rotor in the compressor comes up to speed. If the unit nameplate or installation instructions specify a circuit size, those numbers are used. many electricians size the wires for the breaker for a compressor, but this is not required. The wires are 125% of the RLA. The unit will only draw this much current when it is loaded to full capacity, so the current will be lower on all but the worst days of heating or cooling....See MoreBroken Heat Pump Liquid Return Line, Repair or Replace Heat Pump
Comments (2)I would (at least) go with flushing the lines out, adding a 2 way liquid drier and a suction drier. pull a micron vacume to 400, lock the system in the A/C mode and run it a week, then replace the liquid drier and remove the suction drier. Was the cut in the aluminum coil? A repair kit for that will be permanent. I don't know what you mean by damage to the "condensor"- that is the outdoor coil section. It is possible the system ran while it was raining (heat mode) and if a lot of moisture is suspected, checking the oil in the compressor would help make the desicion on which course to take. Many american standards have a 10 year warranty on the compressor and coil, so doing the above first would be my choice. If the unit needs replacing because of moisture contamination and it's that bad, the best route may be to replace the whole system for the long haul. Green oil and clumpy oil in the compressor or lines will indicate this extreme moisture contamination and installing filters driers won't work....See Moreheat pump & auxiliary heat question
Comments (4)Most systems that don't have super-sophisticated controls, the indoor thermostat triggers the auxiliary if the room temp drops 2°F or so below the setpoint ... or if the thermostat is electronic (but still not super-sophisticated), it may activate the auxiliary based on run-time, if the compressor is running and the room temp isn't rising to the setpoint fast enough. "Auxiliary" by definition runs the heat strip concurrent with the compressor. The compressor doesn't shut off, the heat strip supplements it. "Emergency" heat, on the other hand, does run the heat strip(s) exclusively, with the compressor being shut off, this is primarily in case of compressor failure. "Auxiliary" and "emergency" both use the heat strips, just different terms and usage intents. The auxiliary also runs during defrost, during which the heat pump reverses back to air conditioning to heat up the outdoor coils and melt off accumulated frost. The heat strips running during defrost have nothing to do with melting the frost, they're turned on to counteract the cold "air conditioned" air that would otherwise be blowing in the house. A sophisticated control system with outdoor temp sensors can switchover to the auxiliary and lock-out the compressor at very low outdoor temps ... and likewise lock-out the auxiliary so it can't run (except during defrost) until the outdoor temp drops to a specified point regardless of how far-off the room temp is from the thermostat setpoint....See MorePool heat pump and/or heat pump w/ chiller option in Texas
Comments (9)Sizing a Heat Pump Pool Heater. https://www.heating-air-conditioning.org/ You should have a trained pool professional perform a proper sizing analysis for your specific swimming pool to determine pool heater size. Sizing a heat pump pool heater involves many factors. Basically, a heater is sized according to the surface area of the pool and the difference between the pool and the average air temperatures. Other factors also affect the heating load for outdoor pools, such as wind exposure, humidity levels, and cool night temperatures. Therefore, pools located in areas with higher average wind speeds at the pool surface, lower humidity, and cool nights will require a larger heater. Heat pump pool heaters are rated by Btu output and horsepower (hp). Standard sizes include 3.5 hp/75,000 Btu, 5 hp/100,000 Btu, and 6 hp/125,000 Btu. To calculate an approximate heater size for an outdoor swimming pool, follow these steps: Determine your desired swimming pool temperature. Determine the average temperature for the coldest month of pool use. Subtract the average temperature for the coldest month from the desired pool temperature. This will give you the temperature rise needed. Calculate the pool surface area in square feet. Use the following formula to determine the Btu/hour output requirement of the heater: Pool Area x Temperature Rise x 12 This formula is based on 1º to 1-1/4ºF temperature rise per hour and a 3-1/2 mile per hour average wind at the pool surface. For a 1-1/2ºF rise multiply by 1.5. For a 2ºF rise multiply by 2.0....See MoreBillyBobJo
12 years agolast modified: 9 years agodadoes
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agopjb999
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agodadoes
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agoheatseeker
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agoBillyBobJo
12 years agolast modified: 9 years agoMichael
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