Emerson UP400 User's Guide download pdf (Page 7)

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2.2.3 After labeling all the wires, use a screwdriver to disconnect

each wire from its terminal. Remove the old thermostat.

Make sure that the wires don’t fall

into the wall after you detach them from

the old thermostat. You may choose to

tape them to the wall or tightly wind them

around a pencil or screwdriver.

2.3.1 Detach the new thermostat’s wallplate from the rest of the

thermostat and position the wallplate on the wall according to

the illustration below, passing the labeled wires through the

wire hole in the center of the wallplate.

2.3.2 With the wallplate ﬂ ush against the wall, mark mounting holes

with a pencil.

2.3 Install new thermostat’s wallplate

2.4 Match and connect wires

Do not allow wires to touch each other or parts on

the thermostat. Doing so could result in damage to your heating and

cooling unit.

2.3.3 Move the wallplate aside. Drill the mounting holes using a 3/16"

drill bit. With a hammer, tap the wall anchors, provided in the

package, into the drilled holes.

2.3.4 Position the wallplate on the wall again and screw the mounting

screws into the wall anchors. Do not use a power screwdriver,

you may damage your thermostat.

2.4.1 Match each wire coming from the wall to its corresponding

terminal, as shown in the illustration below. Insert each wire into

the hole on the side of its matching terminal. Using a screwdriver,

tighten the screw securely. DO NOT REMOVE THE WIRE LABELS.

A maximum of one wire from the wall can be wired

into each terminal.

Wallplate

Mounting hole

2.4.2 In the new thermostat, a jumper wire

connects the RC and RH terminals.

If, in your OLD thermostat… Then…

Terminals RC and RH (or 5, or R5) …leave the jumper wire in place

were connected by a jumper wire, in the new thermostat.

There was a terminal R, which you then …leave the jumper wire in place

labeled RC according to 2.2.2, in the new thermostat.

Terminals RC and RH (or 5 or R5) …remove the jumper wire from the

were NOT connected by a jumper wire, new thermostat.

If you’re not sure whether terminals RC and RH were connected in your old

thermostat, refer to your notes made in section 2.2.2.

No thermostat installation uses all of the wires shown below.

In most cases, between 4 and 5 terminals are wired. The remaining

terminals will not be used.

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Emerson UP400 User's Guide Page 7

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