Hunter Fan 42995 사용자 설명서

Digital Thermostat Installation in RV HVAC Systems 

Page 3 of 5 

TEXT OF ALAN PASKEY'S ARTICLE as FOLLOWS (FOR COLEMAN UNITS) 

The wires coming out of the a/c are as follows: 

Red = +12 

VDC 

Blue 

= 

 -12 VDC 

Green =  Fan 

High 

Gray = Fan 

Low 

White =  Furnace 
Yellow =  Compressor 

The wire terminals on the new stat are as follows: 

RC = 

cooling 

relay 

RH = 

heating 

relay 

G = 

Fan 

W = 

Heat 

Y = 

A/C 

compressor 

I hooked up everything as follows: 

RC = 

Red 

wire 

RH = 

Red 

wire 

G 

= 

see notes below 

W = 

White 

wire 

Y = 

Yellow 

wire 

Notes: 

1. 

I did not use the Blue wire (-12 VDC)...  The book says it goes to all relay coils but as far 
as I can tell in the stat, it is used for a delay circuit for the compressor...  I MAY BE 
COMPLETELY WRONG!!!  I have the circuit drawn out if there is an EE or someone 
smarter than I am that can figure it out... It looks like a simple circuit with 2 caps and a 
transistor...  If someone knows what it is really for, please let me know... 

2. 

I took a wire from "G" on the stat to the common on a single pole double throw (SPDT) 
switch...  I wired the fan high and fan low to the switch...  This allows me to still control 
the high and low of the fan just like the old stat... 

3. 

This has worked for me but I can't make any promises for anyone else... A little research 
should be able to determine if it will work for you or not...  

4. 

Total cost:  $19.99 +tax for the stat from Wal Mart and $2.99 +tax for the switch from 
Radio Shack... 

Hope this helps someone else out. - Alan Paskey