reconstruct
12-03-2011, 08:27 PM
Thanks for great site & your help with a couple of questions…
Had a new heat pump installed about a month ago and its working great – 3.5t, Rheem RPQL-JEZ with RHKL, Aprilaire2200, Honeywell IAQ. Installer weighed in additional charge for 38’ lineset and checked charge per install instruction (liquid pressure method) – however, per liquid pressure chart it was slightly low (chart says 310psi and gauges showed 300psi) – installer did not want to further adjust charge until weather warmed and could run in cooling to check/confirm charge. Now it looks like it will be spring before we get warm enough weather and am a little concerned about possible slight under/over-charge. Was hoping for your 2nd opinion about charge – is it likely fine and ok until spring to fine tune charge in cooling ? Also, does/can IAQ stat monitor AUX heat use – I can't find anything in manual but thought I’ld ask. Last, have tried both fan ‘on’ and ‘circ’ mode – any opinion which may be better option to keep temps balanced – any opinion if significant difference in long term operating cost – I am thinking ‘on’ for heating and ‘circ’ for cooling (so coil will have some time to drain/dry). Thanks. Tom
Had a new heat pump installed about a month ago and its working great – 3.5t, Rheem RPQL-JEZ with RHKL, Aprilaire2200, Honeywell IAQ. Installer weighed in additional charge for 38’ lineset and checked charge per install instruction (liquid pressure method) – however, per liquid pressure chart it was slightly low (chart says 310psi and gauges showed 300psi) – installer did not want to further adjust charge until weather warmed and could run in cooling to check/confirm charge. Now it looks like it will be spring before we get warm enough weather and am a little concerned about possible slight under/over-charge. Was hoping for your 2nd opinion about charge – is it likely fine and ok until spring to fine tune charge in cooling ? Also, does/can IAQ stat monitor AUX heat use – I can't find anything in manual but thought I’ld ask. Last, have tried both fan ‘on’ and ‘circ’ mode – any opinion which may be better option to keep temps balanced – any opinion if significant difference in long term operating cost – I am thinking ‘on’ for heating and ‘circ’ for cooling (so coil will have some time to drain/dry). Thanks. Tom