Advertisement
C A U T I O N
Read instructions carefully before removing any wiring from existing
thermostat. Wires must be labeled before they are removed. When removing
wires from their terminals, ignore the color of the wires since they may not
comply with any standard.
REMOVING THE OLD THERMOSTAT
1. Switch electricity to the furnace and air conditioner
OFF; then proceed with the following steps.
2. Remove cover from old thermostat. Most are snap-on
types and simply pull off. Some have locking screws on
the side. These must be loosened.
3. Note the letters printed near the terminals. Attach labels (enclosed) to
each wire for identification. Label and remove wires one at a time. Make
sure the wires do not fall back inside the wall.
4. Loosen all screws on the old thermostat and remove it from the wall.
MOUNTING THE PSD111 ON THE WALL
1. Decide whether the thermostat will be mounted vertically or horizontally.
C A U T I O N
Be careful not to drop the unit or disturb any electronic parts.
4. Cup the thermostat with one hand behind the thermostats display.
Separate the unit from it's base
plate using the tabs protruding
from it's body with the other hand.
N O T E
If you are mounting the base to a soft material like plasterboard or if you
are using the old mounting holes, the screws may not hold. Drill a 3/16-
in. (4.8mm) hole at each screw location, and insert the plastic anchors
provided. Then mount the base as described below.
BASE
ATTACHING WIRES
5. Route the wires through the large hole in the base
plate by the terminal block. Hold the base against the
wall, with the wires coming through. Position the base
for best appearance (to hide any marks from an old
thermostat). The terminal block should be either to the
right of or below the routing hole. Attach the base to the
wall with the two screws provided.
2. Strip insulation 3/8 in. (9.5mm) from
wire ends and clean off any corrosion.
3. Fill wall opening with non-combustible
insulation to prevent drafts from affecting
the thermostat.
TAB
TERMINALS
WIRING DIAGRAMS
These diagrams are provided for new installations or un-referenced
wires.
HEATING SYSTEMS
W
H
4
W
RH
RC
R
V 5
RH
P
J
R
U
B
O
M
V
P
I
E
O
D
R
E
D
RC
Y
G
F
G
C
TC B
C
OPTIONAL
ALL COMMON WIRES ARE OPTIONAL
AND MAY BE TAPED OFF
HEATING / COOLING SYSTEMS
4- or 5-WIRE WITH ONE TRANSFORMER
W
H
4
W
RH
RC
R
V 5
RH
P
DO NOT CONNECT
J
B**
R
A "B" WIRE HERE
U
B
O
UNLESS YOU ARE SURE
M
V
THAT IT IS CORRECT
P
O
I
E
O
D
OPTIONAL
R
E
D
RC
Y
C*
6
Y
G
F
G
C
B
TC
C
OPTIONAL
ALL COMMON WIRES ARE OPTIONAL
AND MAY BE TAPED OFF
* IF Y AND "C" ARE BOTH PRESENT,
"C" IS THE COMMON WIRE
** IF A "B" WIRE IN YOUR SYSTEM IS A
SYSTEM COMMON, THEN CONNECTING IT
AT THE "B" TERMINAL MAY CAUSE
DAMAGE TO YOUR SYSTEM
TYPICAL 2 WIRE HEAT HOOKUP
24 VAC AND MILLIVOLT SYSTEMS
W
GAS
VALVE
RH
XFMR
24
P
J
R
VAC
U
B
O
M
V
P
I
E
O
D
R
E
D
RC
Y
G
C
OPTIONAL
COMMON
TYPICAL 4 WIRE HOOKUP
HEATING AND COOLING
W
RH
P
J
R
U
B
O
M
V
P
I
E
O
D
R
E
D
RC
Y
G
C
TYPICAL 5 WIRE HOOKUP
HEATING AND COOLING
GAS
W
VALVE
RH
XFMR
24
R
J
VAC
E
U
B
M
M
O
P
V
E
O
E
R
24
D
VAC
RC
XFMR
Y
COMPRESSOR
G
FAN
C
OPTIONAL
COMMON
COOLING SYSTEMS
W
RH
P
J
R
U
B
O
M
V
P
I
E
O
D
R
E
R
RC
V
D
RC
Y
C*
6
Y
G
F
G
C
B TC
C
ALL COMMON WIRES ARE OPTIONAL
AND MAY BE TAPED OFF
* IF Y AND "C" ARE BOTH PRESENT,
"C" IS THE COMMON WIRE
HEATING / COOLING SYSTEMS
5- or 6-WIRE WITH TWO TRANSFORMERS
W
H
4
W
RH
V 5
RH
R
B**
J
E
B
U
M
M
O
O
P
V
O
E
E
R
D
RC
R
RC
Y
C*
6
Y
G
F
G
C
B
TC
C
ALL COMMON WIRES ARE OPTIONAL
AND MAY BE TAPED OFF
* IF Y AND "C" ARE BOTH PRESENT,
"C" IS THE COMMON WIRE
** IF A "B" WIRE IN YOUR SYSTEM IS A
SYSTEM COMMON, THEN CONNECTING IT
AT THE "B" TERMINAL MAY CAUSE
DAMAGE TO YOUR SYSTEM
TYPICAL 3 WIRE HEAT HOOKUP
WHERE THIRD WIRE IS FAN WIRE
W
GAS
VALVE
RH
AC
XFMR
24
LINE
P
J
R
VAC
U
B
O
M
V
P
I
E
O
D
R
E
D
RC
Y
G
FAN
C
OPTIONAL
COMMON
GAS
VALVE
AC
XFMR
24
LINE
VAC
COOL
COMPRESSOR
FAN
OPTIONAL
COMMON
TYPICAL SINGLE STAGE HEAT PUMP
HEATING AND COOLING
USE "B" OR "O"
W
BUT NOT BOTH
RH
AC
LINE
P
J
R
U
B
O
B
B B
M
V
OR
P
I
E
O
O O
O
D
R
24
E
D
VAC
AC
RC
LINE
Y
COOL
G
C
OPTIONAL
COMMON
NOTE: ADD JUMPER BETWEEN "W" AND "Y"
OPTIONAL
DO NOT CONNECT
A "B" WIRE HERE
UNLESS YOU ARE SURE
THAT IT IS CORRECT
OPTIONAL
OPTIONAL
AC
LINE
CHANGEOVER
VALVE
AC
XFMR
LINE
HEAT
COMPRESSOR
FAN
Hide quick links:
Advertisement
