Honeywell RTH111B To Replace Duotherm T-Stat
I have been reading about this thermostat upgrade and have the RTH111B unit on hand to replace a Duotherm that was the original equipment in a 2008 Cedar Creek fifth wheel. I have searched and read various posts, opened the Duotherm to examine the wires and opened the Honeywell to examine its connections. The wiring seems clear from older posts as follows (wire color on left, Honeywell terminal on right):
Red---tape off
Yellow---Y terminal
White---W terminal
Brown and Blue---combine into G terminal (allowing hi fan speed only)
Green---R terminal
This wiring will leave three unused terminals on the Honeywell --- B, O, and RC. In some of the older posts that I read, the Honeywell units have had a factory installed jumper wire running from R to RC. My unit does not have the jumper wire. Do I need to install a jumper to make this work properly?
I see many install an additional switch to permit low and high fan speed switching while others skip this step. We have always just run our unit on high speed without paying much attention to the low speed option. Is the low speed much quieter or different than the high speed? If yes, I might wire in the switch. Can anybody direct me to a online source for a correct switch for this task? I would prefer to install the switch on the Honeywell mounting plate vs. a separate switch cut into the wood paneling. Amazon is my preferred online retailer. Thanks.
Red---tape off
Yellow---Y terminal
White---W terminal
Brown and Blue---combine into G terminal (allowing hi fan speed only)
Green---R terminal
This wiring will leave three unused terminals on the Honeywell --- B, O, and RC. In some of the older posts that I read, the Honeywell units have had a factory installed jumper wire running from R to RC. My unit does not have the jumper wire. Do I need to install a jumper to make this work properly?
I see many install an additional switch to permit low and high fan speed switching while others skip this step. We have always just run our unit on high speed without paying much attention to the low speed option. Is the low speed much quieter or different than the high speed? If yes, I might wire in the switch. Can anybody direct me to a online source for a correct switch for this task? I would prefer to install the switch on the Honeywell mounting plate vs. a separate switch cut into the wood paneling. Amazon is my preferred online retailer. Thanks.
