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Replacing Thermostat - Internet capbable
#11

My original PSG Signature thermostats failed.  I replaced them with Newell supplied RVComfort-PHP 6635A336 which work great and allow me to run single or dual compressors for both front and back.  I had trouble understanding their wiring diagram so I make my own diagram which I have attached if anyone decides to install these.
   

2001 Newell #579
tow a Honda Odyssey
fun car: 1935 Mercedes 500K replica
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#12

Honeywell claims that the RTH9580WF wifi touchscreen thermostat works with multistage units. Finding the correct wiring combination could be a bit of a challenge based on Chester's information. The Honeywell has connectors for C, K, Rc, R, W-O/B, Y, G, W2-Aux/E, Y2 and L. Incidentally C is required.

Michael Day
1992 Newell 43.5' #281
NewellOwner.com
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#13

The Honeywell operates on 24 volt AC. What voltage does the SCS use for the thermostat?

Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
PO 1999 Foretravel 36'
1998 Newell 45' #486 

1993 Newell 39' #337 
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#14

(06-05-2016, 02:13 PM)Fulltiming Wrote:  Honeywell claims that the RTH9580WF wifi touchscreen thermostat works with multistage units. Finding the correct wiring combination could be a bit of a challenge based on Chester's information. The Honeywell has connectors for C, K, Rc, R, W-O/B, Y, G, W2-Aux/E, Y2 and L. Incidentally C is required.

It's true, both our heater and A/C are multiple stage units.

Jon & Chris Everton
1986 40' Dog House #86
450 hp ISM 5 spd ZF Ecomat 2
2004 Range Rover L322 Toad
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#15

Here is the wiring diagram for the SCS basement unit control board.  Looks like 12VDC and no C wire.


Attached Files Thumbnail(s)
   

Bill Johnson
Birmingham, Alabama
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#16

Looks like you would at least need a transformer to supply 24VAC to the thermostat.

Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
PO 1999 Foretravel 36'
1998 Newell 45' #486 

1993 Newell 39' #337 
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#17

the nest is a little unique. it can do power stealing if it doesnt have a C 24v AC power wire. you can research that on the NEST forums. i have 3 nests in my house. one of them didnt have the C power so with the extra wire in the cable i hooked it up at the air handler and thermostat.

even though the nest can power steal, it has been know to cause problems with the control board in the air handler, so i wouldnt do it.

as forest said for the wifi based home thermostats, they will i think all require a 24v C power wire.

tom

2002 45'8" Newell Coach 608  Series 60 DDEC4/Allison World 6 Speed HD4000MH

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#18

As Forest mentioned, it is fairly easy to get a 24 volt power supply for the thermostat.
http://www.amazon.com/Class-II-Transform...B004VMVDTA
http://www.amazon.com/Elk-TRG2440-24VAC-...P1CZ7SS8X2

Michael Day
1992 Newell 43.5' #281
NewellOwner.com
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#19

Anyone know how to remove the cover to expose the wiring on the PSG thermostat?

Karen & Adrian Abshire 
1998 2 slide 45' Newell Coach 498 
Prior: 1985 Foretravel ORED 35, 1988 38' Foretravel U280, 2000 Foretravel 42' U320, 1990 Bluebird Wanderlodge WB40
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#20

The front snaps off of most thermostats leaving the base plate on the wall with the wires attached to the base plate.

Michael Day
1992 Newell 43.5' #281
NewellOwner.com
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