White Rodgers 90 SERIES - Manual (Page 2)

2
ATTENTION!
This product does not contain mercury.
However, this product may replace a unit
which contains mercury.
Do not open mercury cells. If a cell becomes
damaged, do not touch any spilled mercury.
Wearing nonabsorbent gloves, take up the
spilled mercury and place into a container
which can be sealed. If a cell becomes
damaged, the unit should be discarded.
Mercury must not be discarded in household
trash. When the unit this product is replacing
is to be discarded, place in a suitable
container and return to White-Rodgers at
9797 Reavis Road, St. Louis, MO, 63123-
5398 for proper disposal.
REMOVE OLD THERMOSTAT
Shut off electricity at main fuse or circuit
breaker box until installation is complete
AND the new thermostat is configured
properly.
INSTALLATION
Remove the front cover of the old thermo-
stat. With wires still attached, remove wall
plate from the wall.
Identify each wire attached to the thermo-
stat using one of the labels enclosed with the
new thermostat.
Disconnect the wires from the old thermostat
one at a time. DO NOT let the wires fall
back into the wall.
Install the new thermostat using the follow-
ing procedures.
ATTACH BASE TO WALL
Remove packing material from the thermo-
stat. Place fingers of one hand on the center
top and bottom portion of the thermostat.
Grasp the base in the other hand on top and
bottom center and gently pull straight out.
Forcing or prying on the thermostat will
cause damage to the unit.
Place the base over the hole in the wall
where the wires come out and mark mounting
hole locations using the base as a template.
Drill
3 ⁄
16
” pilot holes, and install screw
anchors in the wall.
Run wires through hole in base and attach
base to wall (see fig. 1).
Insert the wires into the terminals on the base
using the appropriate wiring diagram and
tighten the terminal screws.
CONFIGURING AND PROGRAM-
MING
Before the power is turned on, the
thermostat must be configured to operate
properly with the system. See the CON-
FIGURATION section of this manual.
This thermostat can be programmed for
automatic temperature control. Refer to
Operating Instructions for programming.
Figure 1. Thermostat base and terminals
R C
R
C
E W2 W1 Y2 Y1 B O G
PH D SA SB SC OT L
1
2 3
4
1
5
W3
A1
E2
P
1 Mounting screws
2 Pull wires through this opening
3 Insert wires into terminal holes, then tighten screws
4 Screw anchors
5 Jumper connections for remote sensor power
(Do not remove)