Robertshaw 9420 wiring

[r247yan]

Hello all...

I hope someone can help me out.. Today at work i installed a Rheem heatpump and rheem air handler.. It has a heat pack ( heat strips ) and when i turn on heat, the heat pump never comes on... I am wiring a robertshaw 9420 tstat and have the following.

R - red - 24 hot transformer
E - Black - Emergency heat
Y - yellow (y1) - cooling
G - green - fan
B _ Orange reversing vale energized in call for heat )
C _ Common - comon side
W _ White (w1)- heat

electric strips come on and blow warm air , but heat pump not running..
should i jump out W1 & Y1 -- on stat

its a 2 heat 2 cool stat..


I remeber having to do this on somekind of honeywell heatpump stat.. but you guys now how rheem & ruud arer with there wiring...

help..




[Edited by r247yan on 06-22-2005 at 09:58 PM]

[r247yan]

damn... i was hoping for a few suggestions... help

[miami mike]

It looks like the stat is wired correctly.

Does it have an O/B switch inside the stat?

Do you have 24 volts at the condensor?

Or at the A/H?

Time to get the voltmeter out.

[tpa-fl]

Originally posted by r247yan
electric strips come on and blow warm air , but heat pump not running..
should i jump out W1 & Y1 -- on stat

Are you sure it's the HP version of that stat or if it's configured to run as an HP stat? It should be energizing the Y terminal upon heating. Also, how high are you setting the heat? maybe you're setting it too high and it's calling for the second stage of heat?

[r247yan]

well i have to just remember a few things and get my volt meter out... i havent been back to that job since posting... job down in hamilton virgina.. ( It a fire restoration of building, so ill probably wont be back for a few weeks...

i set the heat just 3 or 4 degrees and still have nothing.. On stat i see (2) two flames.. so i huess its calling for second stage.. i must not be getting a call for the heat pump.. Ill just have to spend a few minutes and just re-wire ... thanks alot for answering..

[ct2]

I just connected the same stat to a lennox heat pump yesterday and the jumper depends on weather the reversing valve is energised on heat or cool