Lux Products PSD111 warranty U T I O N

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.

Y	REMOVING THE OLD THERMOSTAT
W	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.

Y	Y		2. Strip insulation 3/8 in. (9.5mm) from
W	W		wire ends and clean off any corrosion.
		R
			3. Fill wall opening with non-combustible
			insulation to prevent drafts from affecting
			the thermostat.

WIRING DIAGRAMS

These diagrams are provided for new installations or un-referenced wires.

			HEATING SYSTEMS						COOLING SYSTEMS
		W	W	H	4			W
			RH RC R	V	5
		RH						RH
J	P					J	P
	R	B					R	B
U O						U O
M V						M V
P	I	O				P I		O
R	E					R	E
E	D					E	D
	D	RC					D	RC	R RC	V
		Y						Y	Y C*	6
			G	F					G	F
		G						G
			C TC B						C B TC
		C						C
					OPTIONAL					OPTIONAL
			ALL COMMON WIRES ARE OPTIONAL						ALL COMMON WIRES ARE OPTIONAL
			AND MAY BE TAPED OFF						AND MAY BE TAPED OFF
									* IF Y AND "C" ARE BOTH PRESENT,
									"C" IS THE COMMON WIRE

HEATING / COOLING SYSTEMS	HEATING / COOLING SYSTEMS
4- or 5-WIRE WITH ONE TRANSFORMER	5- or 6-WIRE WITH TWO TRANSFORMERS

W

W

H

4

W

W

H

4

RH RC R

V

5

RH

V

5

RH

RH

J

P

B**

DO NOT CONNECT

R

B**

DO NOT CONNECT

R

J

U

O

B

A "B" WIRE HERE

U

E

B

A "B" WIRE HERE

UNLESS YOU ARE SURE

UNLESS YOU ARE SURE

M V

O

M M

O

P

I

O

THAT IT IS CORRECT

P

O

O

THAT IT IS CORRECT

E

OPTIONAL

E

V

OPTIONAL

R D

E

E

R

D

RC R

D

RC

RC

Y

Y C*

6

Y

Y C*

6

G

F

G

F

G

G

C

B TC

C

B TC

C

OPTIONAL

C

OPTIONAL

ALL COMMON WIRES ARE OPTIONAL	ALL COMMON WIRES ARE OPTIONAL
AND MAY BE TAPED OFF	AND MAY BE TAPED OFF
* IF Y AND "C" ARE BOTH PRESENT,	* IF Y AND "C" ARE BOTH PRESENT,
"C" IS THE COMMON WIRE	"C" IS THE COMMON WIRE
** IF A "B" WIRE IN YOUR SYSTEM IS A	** IF A "B" WIRE IN YOUR SYSTEM IS A
SYSTEM COMMON, THEN CONNECTING IT	SYSTEM COMMON, THEN CONNECTING IT
AT THE "B" TERMINAL MAY CAUSE	AT THE "B" TERMINAL MAY CAUSE
DAMAGE TO YOUR SYSTEM	DAMAGE TO YOUR SYSTEM

TYPICAL 2 WIRE HEAT HOOKUP	TYPICAL 3 WIRE HEAT HOOKUP
24 VAC AND MILLIVOLT SYSTEMS	WHERE THIRD WIRE IS FAN WIRE

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.

P J R U O M V P I E D R E

D

W

RH

B

O

RC

Y

G

C

	GAS			W
	VALVE
24	XFMR	AC		RH
		LINE	P
VAC			J R	B
			U O
			M V
			P I	O
			R E
			E D
			D	RC
				Y
				G
OPTIONAL				C
COMMON

TYPICAL 4 WIRE HOOKUP

HEATING AND COOLING

GAS

VALVE

AC

24 XFMR LINE VAC

FAN

OPTIONAL

COMMON

	TAB
BASE	RH W
	B
	Y RC O
	G
	C
	TERMINALS

	W
P	RH
J R	B
U O
M V
P I	O
R E
E D
D	RC
	Y
	G
	C

TYPICAL 5 WIRE HOOKUP

HEATING AND COOLING

GAS

VALVE

AC

24 XFMR LINE VAC

COOL

COMPRESSOR

FAN

OPTIONAL

COMMON

TYPICAL SINGLE STAGE HEAT PUMP

HEATING AND COOLING

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.

J R U E M M P O E V R DE

W

RH

B

O

RC

Y

G

C

24

VAC

24

VAC

OPTIONAL COMMON

GAS

VALVE

AC

XFMR LINE P J R U O M V P I E D R E

AC D

XFMR LINE

COOL

COMPRESSOR

FAN

W

RH

B

O

RC

Y

G

C

	USE "B" OR "O"
	BUT NOT BOTH
B		CHANGEOVER
OR
O	24	VALVE
	VAC	XFMR	AC
			LINE
		HEAT
		COMPRESSOR
		FAN
OPTIONAL
COMMON

NOTE: ADD JUMPER BETWEEN "W" AND "Y"