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	RE: Grant 13kW Aerona3 - issues getting zones to temp By Crimson, 37 minutes ago Forum Air Source Heat Pumps (ASHPs)
	Sorry James a typo there. Eskimos CAN perform at a low delta t. Sausage fingers here. The 8C expected delta set by the Grant ASHP by default may be too high is what I was trying to get at. Comb...
	RE: Grant 13kW Aerona3 - issues getting zones to temp By JamesPa, 45 minutes ago Forum Air Source Heat Pumps (ASHPs)
	Thats a great analysis and \|I doubt any heat loss calculations adequately deal with this. Put another way there is an (probably) unaccounted for loss from ground floor and equal gain to top floor whi...
	RE: Testing new controls/monitoring for Midea Clone ASHP By cathodeRay, 1 hour ago Forum Air Source Heat Pumps (ASHPs)
	This is one of the reasons why AI will be the death of us, you don't have to understand anything! In other words, it removes the human steps of learning, understanding and then doing. That's what we o...
	RE: Grant 13kW Aerona3 - issues getting zones to temp By Crimson, 2 hours ago Forum Air Source Heat Pumps (ASHPs)
	@jamespa i think the challenge is in the house, its an existing 1970s structure thats been highly insulated, basically gutted and celotex up to 100mm on internal walls and a tone of loft insulation a...
	RE: Grant 13kW Aerona3 - issues getting zones to temp By JamesPa, 3 hours ago Forum Air Source Heat Pumps (ASHPs)
	Thanks. I had forgotton that particular feature. I presume the call for heat switches secondary pumps on/off not the heat pump. All of this is going to be much easier to diagnose if its treated as a...
	RE: Grant 13kW Aerona3 - issues getting zones to temp By Crimson, 3 hours ago Forum Air Source Heat Pumps (ASHPs)
	Thanks James, will get back to you. as a reminder theret 3 zones. Ground floor front (5 rads), ground floor rear - UFH and first floor (rads - 8 Stelrads, 2 towel, 1 tall). so I dont thi...
	RE: Daikin Short Cycle Query By Ubert767, 4 hours ago Forum Air Source Heat Pumps (ASHPs)
	@jamespa Thanks again for your reassurance. Rob
	RE: Daikin Short Cycle Query By JamesPa, 4 hours ago Forum Air Source Heat Pumps (ASHPs)
	Its the heat pump, more specifically the compressor, cycling on/off quickly. The most important parameter is the on time, anything less than about 10mins would be considered short. Short cycling re...
	RE: Grant 13kW Aerona3 - issues getting zones to temp By JamesPa, 4 hours ago Forum Air Source Heat Pumps (ASHPs)
	It will inevitably. If your heat pump capacity is perfectly matched to your house loss you can expect the heat pump to cycle from an OAT of roughly 11C and above. If your heat pump capacity exceeds ...
	RE: Grant 13kW Aerona3 - issues getting zones to temp By Crimson, 4 hours ago Forum Air Source Heat Pumps (ASHPs)
	Not able to keep up with both posts but: Night mode was forced constantly. So not just at night but at 60% constantly, assume that's 60% modulation or whatever the manual states. This was done with a ...
	RE: Daikin Short Cycle Query By Ubert767, 4 hours ago Forum Air Source Heat Pumps (ASHPs)
	@jamespa Initially, I didn't know wether the dreaded "short cycling " was regarded as the frequency of the modulation of the compressor by the inverter or as the frequency of "cold "compressor star...
	RE: Oil Boiler & Heat Pump Hybrid System By paultheheating, 6 hours ago Forum Air Source Heat Pumps (ASHPs)
	Thanks for the suggestion, but farmhouse is grade 2 listed, not double glazed, stone walls and not suited to ashp as too big and not insulated. Tenant property does not have gas. On balance it is not...