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035-19671-002 Rev. A (0704)

Unitary Products Group

11

ITEM

DESCRIPTION

MOTOR

1*

MOTOR,DIRECT DRIVE BLOWER

2

MOTOR,VENTOR ASS’Y.

ELECTRICAL

3

CAPACITOR,  RUN

4

CONTROL, HIGH LIMIT

5

CONTROL,FURNACE             [FC]

6

IGNITER

7

SENSOR, FLAME

8

SWITCH, AIR PRESSURE      [1LP]

9

SWITCH, DOOR                        [SW]

10*

TRANSFORMER

11

VALVE, GAS

12

SWITCH, FLAME ROLL-OUT

 [ROS 3]

12A

CONTROL,Flame Roll Out

 (2ea.)[ROS1,2]

13

CONTROL, AUX. LIMIT

(2 ea.),LS2,LS3]-

14*

FUSE (ATO 3)

15

AIR MOVING

16

HOUSING, BLOWER

17

WHEEL, BLOWER

FABRICATED PARTS

18

SHIELD, SECONDARY AIR

19*

BAFFLE, FLUE

20

BURNER, MAIN GAS

21

BRACKET, IGNITOR

22

DECK, BLOWER (Rear)

23

DECK, FRONT

24

HEAT EXCHANGER ASS’Y  

25

MANIFOLD, GAS

26

PANEL. UPPER ACCESS

27

PAN, BASE

28

PANEL, BLOWER ACCESS    

29

PANEL, TOP

30

WRAPPER, INSULATED

31

CHANNEL, TOE PLATE

32

BRACKET, TOP DOOR

33

BRACKET, BOTTOM DOOR

34*

RACK, FILTER

35

FRAME, SIDE BASE (2 Req’d)

36

BRACKET, ROLL-OUT SWITCH

37

ORIFICE, BURNER (Natural #45)

38

PLATE, RESTRICTOR

39

COLLAR, FLUE

40*

LO-NOX SCREEN

 (L Models only)

MISCELLANEOUS

41*

FILTER  (.75 x 16 x 25)

42

SIGHT GLASS, OVAL

43

GASKET, RESTRICTOR PLATE

44

TUBING, SILICONE

45

46*

DIAGRAM, WIRING 

47*

HARNESS, MAIN WIRING

48*

ISOLATOR, TUBE (3 Req’d.)

49*

ISOLATOR, WASHER (3 Req’d.)

50*

ISOLATOR,SLEEVE (3 Req’d.)

51*

MOUNT, MOTOR

52*

GROMMET, 1/2” DIA.

53

DOOR KNOB

54*

RETAINER, DOOR KNOB

55*

NUT, SELF THREADING

56*

RETAINER, SQUARE

ITEM

DESCRIPTION

NOTE:

*Not Shown

Major components and suggested stocking items are shown with shaded item number.

Summary of Contents for PT8

Page 1: ...all gas con trols control system parts electrical parts that have been wet or the furnace if deemed necessary FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious...

Page 2: ...pace containing the furnace 4 Examine the furnace casing making sure the physical support is sound without sagging cracks or gaps Examine the furnace base making sure it is physically sound without cr...

Page 3: ...water Operating Instructions 1 STOP Read the safety information above 2 Set the thermostat to the lowest setting 3 Turn off all electric power to the appliance 4 Remove burner door 5 Move gas control...

Page 4: ...ve a bottom or side return air duct using the following method a If the return air filter is on the left or right side of the furnace it is a side return b If the air filter is on the bottom of the fu...

Page 5: ...rner assembly 7 Burners may be cleaned by rinsing in hot water 8 Reassemble the burners in the reverse order Cleaning the Heat Exchanger Lower Heat Exchanger Access 1 Turn off the electrical power to...

Page 6: ...acts of 2LP The High Fire Pressure Switch The Control checks that 2LP is closed The Gas Valve is energized on 2nd Stage High Fire The Control simultaneously de energizes the Heat Low relay and energiz...

Page 7: ...to the fur nace SLOW GREEN FLASH Normal operation SLOW AMBER FLASH Normal first stage operation with call for heat AMBER PULSE Normal second stage operation with call for heat 3 FLASHES AMBER Indicate...

Page 8: ...MINUTE AUTOMATIC RESET FROM LOCKOUT This control includes a watch dog type circuit that will reset from a lockout condition after 60 minutes Operational faults 6 7 8 will be reset This provides protec...

Page 9: ...W INDUCER LOW STAGE PRESSURE SWITCH HSI 1ST STAGE MAIN VALVE FLAME SENSE LOW CIRCULATOR HEAT SPEED 1ST STAGE LOW PRESSURE SWITCH CLOSE RECOGNITION HSI WARM UP 17 SEC IGNITION ACTIVATION PERIOD 4 SEC T...

Page 10: ...19671 002 Rev A 0704 10 Unitary Products Group SECTION III REPLACEMENT PARTS LIST 2 4 11 9 5 3 6 8 7 12 13 16 17 26 53 28 42 39 29 38 43 21 25 32 33 35 31 27 23 22 44 30 24 18 20 12A 7 35 24 36 12 19...

Page 11: ...NGER ASS Y 25 MANIFOLD GAS 26 PANEL UPPER ACCESS 27 PAN BASE 28 PANEL BLOWER ACCESS 29 PANEL TOP 30 WRAPPER INSULATED 31 CHANNEL TOE PLATE 32 BRACKET TOP DOOR 33 BRACKET BOTTOM DOOR 34 RACK FILTER 35...

Page 12: ...650 78 N1 1V 1PS0314 1CB0314 COMBUSTIBLE FLOOR BASE FOR DOWNFLOW UNITS ALL 14 1 2 A CABINETS 1CB0317 ALL 17 1 2 B CABINETS 1CB0321 ALL 21 C CABINETS 1CB0324 ALL 24 1 2 D CABINETS REPLACEMENT PART CON...

Page 13: ...035 19671 002 Rev A 0704 Unitary Products Group 13 SECTION IV WIRING DIAGRAM FIGURE 9 Wiring Diagram...

Page 14: ...035 19671 002 Rev A 0704 14 Unitary Products Group NOTES...

Page 15: ...035 19671 002 Rev A 0704 Unitary Products Group 15 NOTES...

Page 16: ...anty applies only to products installed in the United States and Canada EXCLUSIONS This warranty does not cover any 1 Shipping labor or material charges 2 Damages resulting from transportation install...

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