UNP310 Install Guide

Loading ...

Do you have a “B” wire?

Labelingthe“B”wirecanbetricky.Itcouldbelabeledas“C”or“O/B”dependingonwhetheryouhavean“O”wire

connectedtoyouroldthermostat.Pleasepayattentionandfollowtheasterisk(*)commentsbelowwhilelabelingit.

*Label“B”as“C”onlyiftheoldthermostatalsohadawireinthe“O”terminalblock.Iftherewasnowireinthe“O”

terminalblock,labelthewireas“O/B”

**OnheatpumpsystemswithseparateW2andEwires,labelbothwiresW/E(2wiresononeterminal)

3.4 Identify jumper wire

ForterminalRCandRH:

On your old thermostat, if… Then, on your new thermostat…

TerminalRCandRHareconnected

with a jumper wire

LeavetheRC/RHjumperwireinitsplace

There’sonlyoneRwire(RC,RH,RorR5)

coming out of the wall

LeavetheRC/RHjumperwireinitsplace

Two separate R wires come out of the wall, and

they are NOT connected by a jumper wire

ClipthejumperwirebetweenRCandRHonthe

back of the new thermostat

Loading ...

Install Guide - Page 11