Emerson UP310 Install Guide

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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.

*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

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Emerson ‎UP310 Premium 7 Day Programmable Thermostat