Lochinvar 2072, 502 operation manual Controller

Installation & Operation Manual

9 Connection diagram (continued)

LT HARNESS

Notes:

L HARNESS

1. All wiring must be installed in accordance with : local, state, provincial and national code requirements per either

N.E.C. in USA or C.S.A. in Canada.

2. If any original equipment wire as supplied with the appliance must be replaced , it must be replaced with wire

R/BK

1

having same wire gauge (AWG) and rated for a minimum of 105°C

Y

1

3. Actual connector block locations may vary from those shown on diagrams . Refer to actual components for

X13

20

T

proper connector block locations when using diagrams to trouble shoot unit .

OPT. ALARM

W

2

X8

19

GY

LOW

BL

3

LWCO

BL

T

18

Y/G

1

BL

BL

1

O/BK

VOLTAGE

3

O/BK

17

BR/W

O

4

2

Y

Y

2

T

TEST

HARNESS

BL

5

4

O

16

BK/R

3

2

1

LWCO

R/BK

FLOW SWITCH

BL

6

FLOW

6

5

4

152 BL/BK

PROBE

~~~~

BR

7

SWITCH

~~~~

14

BK

O

1

1

O

~~~~

W/BK

8

RESET

132

W/R

O/BK

2

2

O/BK

G

LWCO

3

PR

CONTROLLER

Y

BL BL

12

R/W

CHASSIS

2

R

10

T

NC

BLOCK

24VAC

PR

3

2

1

GROUND

1

11

W

P

FLUE

6

5

4

6

P

NO

COMSWITCH

CONNECTION

AIR PROVE

5

P

BOARD

O/R

4

BL

COM

SWTICH

4

PR

X7

8

PR

HI-GAS

1 PR

BL

1

O/BK

2

2

O/BK

Y

R

BL

R

10

Y

O/R

2

2

1

1

O

2

120V

11

W/BK

BL

1

1

O/BK

3

O

LO - GAS

12

T

BL

O

R

R

4

2

2

O

13

GY

R

SILENCING

ALARM

ALARM RELAY

O/R

5

BL

O/BK

1

1

O/BK

14

T/W

R

1

SWITCH

BELL

120VAC COIL

R/O

6

2

152

R/W

BR

7

16

BR/W

X6

1

C

2

GROUNDING

NC C NO

DIGITAL

1

O

X5

+

AUXILLIARY

GY

2

OPTION

IDENTIFICATION PLUG

HI-LIMIT

HARNESS

3

G

+

JUMPER

X11

MODEL SPECIFIC

X9

X4

CONSULT

LOW VOLT HARNESS

FACTORY

1

2

3

1

NOTE: NUMBER OF GAS VALVES VARIES BY MODEL

O O/BK

LAY

2-SPD BLOWER

R

BL

G

1

BK

HI

HI

BK

1

2

R

Y

R

R

Y

R

R/BKY R/BK

R/O Y R/O

R/O Y R/O

R/W Y R/W

O/

2

R

LO

LO

R

2

O

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

120V

BK

3

W

NEU

NEU

W

3

S1

S1

S2

S3

S3

S4

4

G

GND

GND

G

4

1

3

TO

BL

1

Y

1

2

3

4

5

6

CONNECTION

R/O

4

BK/

BK

BK/

BK

G

BOARD

2

Y

BK

BK/

R/W

5

LOW GAS

W

R

W

R

2

3

Y

STAGE #1

STAGE #1

STAGE #2

STAGE #3

STAGE #3

STAGE #4

TO

BK 1

TO

6

SWITCH

1

BL

BK/

PWR

3 2

W 3

XFMR

R

BURNER

#2 HSI

BURNER

W

120V

HI LO

120V

W

W

R/BK

#1 HSI GROUND

GROUND

W

MODBUS ADAPTER

BLOWER RELAY

HI/LO SPEED RELAY

GY

1

GY

G

GY/W

G

120VAC COIL

120VAC COIL

FACTORY

FIELD

G

GY

2

GY

GY/W

CIRCUIT

BL

OPTIONS

OPTIONS

3

BREAKER

WIRE COLOR REFERENCE

G

4

GY/W

BL

5

GY/W

MAIN UNIT HARNESS

W = WHITE

T=TAN

R

6

!

50VA

BK = BLACK

Y=YELLOW

G

3

2

W

DANGER

120V

24V

PR=PURPLE

BR=BROWN

P=PINK

GY=GRAY

BK

1

BK

BK

60VA

BL

BL

BL=BLUE

G=GREEN

4

BK/W

TO PREVENT ELECTRICAL SHOCK

W

W

75VA

Y

Y

O=ORANGE

R=RED

BK/R

5

THISHEATERMAYBECONNECTED TO MORETHANONEBRANCH

100VA

Y/G = YELLOW WITH GREEN STRIPE

N UNIT

CIRCUIT. MORETHANONEDISCONNECT SWITCH MAY BE

GAS VALVE XFMR

LBL20082 REV A

REQUIREDTO DE-ENERGIZE THEEQUIPMENT FORSERVICING.

63