Dear all,
I'm trying to use air-to-air heat pump (type 954) to heat and cool a zone. I chose the ventilation mode and closed the heating and cooling mode in type 56. However, I found that the heat pump was not able to control the zone air temperature within the set range. The set point for heating was 20C and for cooling, 24C. But the zone air temperature can be as low as 8C when outside temperature is around -20C. Should I increase the power of heat pump by changing its parameters? if so, what parameters should I change? or should I adopt multiple stage heating/cooling (and how)? Thanks!
Enyuan