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24

VAC

CRG

Y/Y2

OW

1

W
2

Y

1

24VAC

COMMON OUT

 FUSED 24VAC

POWER OUT

CALL FOR
FAN

CALL FOR 
COOL.

REVERSING
VALVE

CALL FOR
HEAT 1

X13 COM

X13

 HE

AT

X

13 COOL

XFMR

L1

L1

L2

COM

L2

L2

CO

M

P3-1 P3-2 P3-3

P3-4

P3-5

P3-6 P3-7

BOARD POWER

SUPPLY

POWER

HEAT 1

HEAT 2

HEAT 3

HEAT 4

VOUT

GND

P2-8

P2-7

P2-6

P2-5

P2-4

P2-3

P2-2

P2-1

F1

 5 A

E

HTL

E

HTL

HEAT 1

E

HTL

G

L2

L1

MRHTL

HEAT 2

HEAT 3

KC2

KC1

KC3

COM

NO

COM

NO

COM

NO

BLK (HI)

BLU (MED-HI)

RED (LO)

Cla

ss

 2 Tranformer

Prim.: 240V 60Hz

Second.: 24V 60Hz 40VA

YEL

YEL

RED

BLK

RED

BLK

BLK

BLK

RED

RED

BLK

BLK

BLK

RED

BLK

WHT

HEAT 3

HEAT 2

HEAT 1

PNK

BRN

GRY

PNK

BRN

GRY

WHT

YEL

YEL

WHT

WHT

WHT

CONTINUOUS

SPEED

RED

GRN

N

RED

GRN

YEL (MED

-LO

)

K7

4

6

2

5

1

3

PNK

BLU

BLU

WHT

ORG

WHT

P3

P2

P1

RED

BLK

PNK

CS

T

5

4

3

2

1

N

G

L

C

M

BLK

BLK

RED

RED

ORG

BLK

C=COM

L=LINE

G=GROUND

N=NEUTRAL

1=LO

2=MED HI

3=MED HI

4=HI

5=HI

M

24 Vdc

24 Vdc

24 Vdc

CALL FOR
COOL 1 

CALL FOR
HEAT  2

24 Vdc

MRHTL

WHT

WHT

Open: 93.3°C (200°F)

24Vac

coil

24V~

KC1B

BLK

GRY

NC

RED

F

F + H

PPL

PPL

PPL

GRY

GRY

SPEED

SELECTOR

HEAT INDICATOR

VS

LO

MED-LO

RED

YEL

YEL

RED

VENTILATION SPEED

OFR15000

BLK

BLK

PPL

SS

TB2

NC

Line voltage wiring:
UL AWM 1015/1230, 600V, 105°C,
VW-1,12AWG; 
CSA TEW 600V, 105°C, FT1, 12AWG.

Low voltage wiring: same ratings as
high voltage except 18AWG.

  

Critical Characteri

s

tic

1. If any of the original wire, as 
    supplied, must be replaced, use 
    the same equivalent wire. Wiring 
    must comply with applicable codes,
    ordinances and regulations.

 

2. Field wiring must comply with 
    applicable codes, ordinances and 
    regulations. Use only Class 1 wiring
    inside furnace compartments. 

For the u

s

e of a two-

s

tage heat 

thermo

s

tat or an outdoor thermo

s

tat, 

connect 

b

etween W1and W2. Make 

s

ure that the 

Sea

s

on Select 

s

witch

i

s

 

s

et to the Mild Po

s

ition.

HI  

BLACK 

MED-HIGH  

BLUE

MED-LOW  

YELLOW

LOW  

RED 

 

FAN 
MOTOR SPEED

COLOR

WIRING COLOR CODE 

BLK BLACK
BLU BLUE 
BRN BROWN 
GRN GREEN
GRY GREY 
ORG ORANGE
PNK PINK
PPL PURPLE
RED RED
WHT WHITE
YEL YELLOW

LEGEND

F1 Fu

s

e

E Heating 

Element

KC Heating 

Element

 Relay
K Fan 

Relay

HTL Auto-Re

s

et

 Thermal 

Protector

MRHTL Manual 

Re

s

et

 Thermal 

Protector

M Fan 

Motor

TB2 Terminal 

Block

T Tran

s

former Cla

ss

 2

HEAT Heat
L1, L2 

240V Line Supply

N Neutral

WIRINGS DIAGRAMS

7

WARNING

Risk of electrical shock. Disconnect power before installation, servicing, maintenance or field wiring. Replace all panels before
operating. Failure to do so can result in electrical shock causing severe injuries or death.

!

Summary of Contents for Diablo OFR Series

Page 1: ...condition and to premature furnace failure thus voiding the warranty Do not block the combustion air openings in the furnace Any blockage will result in improper overheat situation and may result in...

Page 2: ...uired it will be indicated on the data label attached to the furnace 4 TEMPERATURE RISE Furnaces are shipped to operate at 0 20 5 mm W C 50 Pa external static pressure They are certified for operation...

Page 3: ...ing spring or fall you may require less rapid response when the thermostat calls for heat When Mild is selected it takes more time to bring all the elements online When Cold is selected the heating el...

Page 4: ...ly wires to the terminal block in the furnace NOTE If a OFR 120 kit will be used to supply an air cleaner and or humidifier a third neutral conductor must be brought into the furnace All wiring must c...

Page 5: ...lubricated for life and needs no oiling FILTERS Size is 20 x 20 x 1 508 mm x 508 mm x 25 mm Should be inspected and replaced when dirty Ordinarily replacement is required twice per heating season and...

Page 6: ...000 7 10940080 Element Assembly 5000 W 240 V 8 10940081 Element Assembly 4500 W 240 V 9 30274131 20 A Relay 10 30274132 30 A Relay 11 30280020 Manual Reset Limit 12 624665 Electronic Control PC Board...

Page 7: ...NC Line voltage wiring UL AWM 1015 1230 600V 105 C VW 1 12AWG CSA TEW 600V 105 C FT1 12AWG Low voltage wiring same ratings as high voltage except 18AWG Critical Characteristic 1 If any of the origina...

Page 8: ...COM NO HEAT 4 WHT 24Vdc PPL PPL BLK PPL BLK BLK SS TB2 NC Line voltage wiring UL AWM 1015 1230 600V 105 C VW 1 12AWG CSA TEW 600V 105 C FT1 12AWG Low voltage wiring same ratings as high voltage except...

Page 9: ...UTEC 1139 610 P2 3 P2 2 P2 1 P1 4 P1 3 P1 2 P1 1 24V regulated RLY PWR2 Heater Logic HEAT6 IN HEAT5 IN HEAT6 HEAT5 PNK GRY PNK PPL PNK PPL PNK BLK BLK BLK PPL TB2 SS NC Line voltage wiring UL AWM 101...

Page 10: ...efective 5 Must set thermostat much higher or lower than the desired house temperature Thermostat is not leveled or out of calibration 6 Not enough heat One or more defective elements or relays Season...

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