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90+ afue – Nordyne Residential Gas Furnaces User Manual

Page 4

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4

90+ AFUE

1 Ignitor (Not Shown)
2 Flame Sensor (Not

Shown)

3 Gas Valve
4 Flame Roll-out

Switch(s)

5 Pressure Switch
6 Vent Pressure

Switch (93+ Only)

7 Control Board

8 Blower Door Switch
9 Vent Safety Switch

10 Low Voltage

Transformer

11 Supply AIr Limit

Switch

12 Circulating Air

Blower Assembly

13 Induced Draft

Blower

14 Condensate Drain

Tube

15 In-Line Drain

Assembly

16 Burner View Port
17 Front Header Box
18 Combustion Air

Intake

19 Exhaust Vent

Upflow/Horizontal Condensing Furnaces

Downflow Condensing Furnace

10

7

8

13

5

9

14

11

3

1

4

16

2

17

15

12

18

19

Figure 2. Furnace Parts Identified

4

1

7

8

9

13

5

19

18

17

2

10

15

11

16

3

6

12

14