We've purchased a home on Vancouver Island, BC, Canada, that has a Lennox heat pump (Model XP15 048 230 01; air source); and a Lennox electric furnace (Model CBX32M 048 230 6 04). There were no info or manuals left in the home about the heat pump system, and we have not owned a heat pump before. (I have downloaded the XP15's installation and operating manual.)
Everything about both the outside & inside units looks and sounds - no blockages; no unusual noises; new filter; good line insulation. The system has seemed to function well all winter, but our electric bills have been higher than expected. (During our winter, temperatures usually range between plus 10 C and minus 3 C; our lowest overnight temperature this winter was minus 8.)
Looking at the inside unit, there appears to be two electric heaters, one (15 kW) fused at 60 amps, and one (20 kW) at 50 amps. I presume these are the 'Auxiliary' and 'Emergency' heat sources.
Our programmable thermostat was set to 16 degrees C overnight, and 20 during the day. If the thermostat schedule has a jump of 4 degrees, would the auxiliary heat source cut in automatically? (This might be why our hydro bills have been so high, but I'm trying to confirm that idea through posting this plea for information.)
I have changed our thermostat to 16 C overnight, with two 2 degree steps in the morning. I'm in the process of checking (using our smart meter) whether that reduces our power usage. (- With a heat pump, would it be best to simply leave the thermostat at the same temperature setting, day & night.)
One last - if the auxiliary heater is off, about what power should the rest of the system draw (compressor, outside fan, & inside fan)?
Thanks for any replies that enlighten me on heat pump basics!
PS. I don't know why my post looks okay on my machine, but is littered with * symbols, with words missing, when I use a question mark or a dash.