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e. Multiply gas rate (cu ft/hr) X heating value (Btu/cu ft)

using natural gas heating value from local gas
utility/supplier.

EXAMPLE: (0—2000 ft altitude)
Btu heating input = Btu/cu ft X cu ft/hr
Heating value of gas = 1050 Btu/cu ft
Time for 1 revolution of 2-cu ft dial = 70 sec
Gas rate = 103 cu ft/hr (from Table 8)
Btu heating input = 103 X 1050 = 108,150 Btuh
In this example, the orifice size and manifold pressure
adjustment is within

±

2 percent of the furnace input rate.

2. Set temperature rise.

Furnace must operate within range of temperature rise
specified on the unit rating plate. Determine the air tem-
perature rise as follows.

a. Place duct thermometers in return and supply ducts as

near furnace as possible. Be sure thermometers do not
"see" heat exchangers so that radiant heat will not affect
thermometer readings. This is particularly important
with straight-run ducts.

b. When thermometer readings stabilize, subtract return-air

temperature from supply-air temperature to determine
temperature rise.

c. Adjust air temperature rise by adjusting blower speed.

Increase blower speed to reduce temperature rise. De-
crease blower speed to increase temperature rise.

WARNING:

Disconnect the electrical power before

changing the speed tap. A failure to follow this warning
can cause personal injury.

d. To change blower motor speed selections for heating

mode, remove blower motor lead from control board
HEAT terminal. (See Fig. 10.) Select desired blower

motor speed lead from 1 of the other terminals and
relocate it to HEAT terminal. See Table 9 for lead color
identification. Reconnect original lead on SPARE termi-
nal.

CAUTION:

Recheck temperature rise. It must be within

limits specified on unit rating plate. Recommended op-
eration is at midpoint of rise or above.

3. Set thermostat heat anticipator.

The thermostat heat anticipator must be set to match the
amp draw of the electrical components in the R-W circuit.
Accurate amp draw readings can be obtained at thermostat
subbase terminals R and W. Fig. 14 illustrates an easy

TABLE 6—MODEL 383KAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT

Continued

(TABULATED DATA BASED ON 22,000 BTUH PER BURNER, DERATED 4 PERCENT PER 1000 FT ABOVE SEA LEVEL)

ALTITUDE

RANGE

(FT)

AVG GAS

HEAT VALUE

AT ALTITUDE

(BTU/CU FT)

SPECIFIC GRAVITY OF NATURAL GAS

0.58

0.60

0.62

0.64

0.66

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

U.S.A.

Only

575

43

2.7

43

2.8

43

2.9

43

3.0

43

3.1

600

43

2.5

43

2.6

43

2.7

43

2.7

43

2.8

9001

625

43

2.3

43

2.4

43

2.4

43

2.5

43

2.6

650

43

2.1

43

2.2

43

2.3

43

2.3

43

2.4

to

675

48

3.7

43

2.0

43

2.1

43

2.2

43

2.2

700

48

3.4

48

3.6

48

3.7

43

2.0

43

2.1

10,000

725

49

3.8

48

3.3

48

3.4

48

3.5

48

3.6

750

49

3.5

49

3.6

49

3.8

48

3.3

48

3.4

775

49

3.3

49

3.4

49

3.5

49

3.6

49

3.7

TABLE 7—ALTITUDE DERATE MULTIPLIER FOR U.S.A.

ALTITUDE

(FT)

PERCENT

OF DERATE

DERATE MULTIPLIER

FACTOR FOR U.S.A*

0—2000

0

1.00

2001—3000

8—12

0.90

3001—4000

12—16

0.86

4001—5000

16—20

0.82

5001—6000

20—24

0.78

6001—7000

24—28

0.74

7001—8000

28—32

0.70

8001—9000

32—36

0.66

9001—10,000

36—40

0.62

* Derate multiplier factor is based on midpoint altitude for altitude range.

TABLE 8—GAS RATE CU FT/HR

SECONDS

FOR 1

REVOLUTION

SIZE OF

TEST DIAL

SECONDS

FOR 1

REVOLUTION

SIZE OF

TEST DIAL

1

cu ft

2

cu ft

5

cu ft

1

cu ft

2

cu ft

5

cu ft

10
11
12
13
14

360
327
300
277
257

720
655
600
555
514

1800
1636
1500
1385
1286

50
51
52
53
54

72
71
69
68
67

144
141
138
136
133

360
355
346
340
333

15
16
17
18
19

240
225
212
200
189

480
450
424
400
379

1200
1125
1059

100
947

55
56
57
58
59

65
64
63
62
61

131
129
126
124
122

327
321
316
310
305

20
21
22
23
24

180
171
164
157
150

360
343
327
313
300

900
857
818
783
750

60
62
64
66
68

60
58
56
54
53

120
116
112
109
106

300
290
281
273
265

25
26
27
28
29

144
138
133
129
124

288
277
267
257
248

720
692
667
643
621

70
72
74
76
78

51
50
48
47
46

103
100

97
95
92

257
250
243
237
231

30
31
32
33
34

120
116
113
109
106

240
232
225
218
212

600
581
563
545
529

80
82
84
86
88

45
44
43
42
41

90
88
86
84
82

225
220
214
209
205

35
36
37
38
39

103
100

97
95
92

206
200
195
189
185

514
500
486
474
462

90
92
94
96
98

40
39
38
38
37

80
78
76
75
74

200
196
192
188
184

40
41
42
43
44

90
88
86
84
82

180
176
172
167
164

450
439
429
419
409

100
102
104
106
108

36
35
35
34
33

72
71
69
68
67

180
178
173
170
167

45
46
47
48
49

80
78
76
75
73

160
157
153
150
147

400
391
383
375
367

110
112
116
120

33
32
31
30

65
64
62
60

164
161
155
150

—15—

Summary of Contents for Series G 383KAV

Page 1: ...PA 90B In Canada refer to the current edition of the National Standard of Canada CAN CGA B149 1 and 2 M95 Natural Gas and Propane Installation Codes NSCNGPIC Wear safety glasses and work gloves Have f...

Page 2: ...LB 024045 14 3 16 12 9 16 12 11 16 4 122 036045 14 3 16 12 9 16 12 11 16 4 124 024070 14 3 16 12 9 16 12 11 16 4 132 036070 14 3 16 12 9 16 12 11 16 4 134 042091 17 1 2 15 7 8 16 4 150 048091 21 19 3...

Page 3: ...oper installation or misapplication of the furnace can require excessive servicing or cause prema ture component failure This furnace is designed for a minimum continuous return air temperature of 60...

Page 4: ...on must not be contami nated by halogen compounds which include fluoride chloride bromide and iodide These elements are found in aerosol sprays detergents bleaches cleaning solvents salts air freshene...

Page 5: ...y connect The minimum dimension of ducts must not be less than 3 in See Fig 4 WARNING Do not install the furnace on its back or sides Safety control operation will be adversely affected Never connect...

Page 6: ...ble 3 indicates filter size location and quantity shipped with the furnace For bottom air return applications filter may need to be cut to fit some furnace casing widths A bottom closure panel is fact...

Page 7: ...istant to the action of propane gas An accessible manual shutoff valve MUST be installed upstream of the furnace gas controls and within 72 in of the furnace A 1 8 in NPT plugged tapping accessible fo...

Page 8: ...024045 115 60 1 127 104 6 0 14 47 15 036045 115 60 1 127 104 8 3 14 34 15 024070 115 60 1 127 104 5 9 14 47 15 036070 115 60 1 127 104 8 7 14 32 15 042091 115 60 1 127 104 9 0 14 31 15 048091 115 60...

Page 9: ...automotive type 3 amp fuse located on the main control board Any direct shorts during installation service or maintenance could cause this fuse to blow If fuse replacement is required use ONLY a 3 am...

Page 10: ...nic air cleaner are energized g Blower off delay When thermostat is satisfied circuit between R W is broken de energizing gas valve stop ping gas flow to burners The blower motor and EAC remain energi...

Page 11: ...RING 24VAC FIELD WIRING 115VAC FIELD WIRING 24VAC CONDUCTOR ON PCB FIELD WIRING TERMINAL FIELD GROUND EQUIPMENT GROUND FIELD SPLICE PLUG RECEPTACLE L1 NEUTRAL L1 BLWR HI LO TO 115VAC FIELD DISCONNECT...

Page 12: ...ion to find orifice size and manifold pressure settings for proper operation EXAMPLE 0 2000 ft altitude Heating value 1025 Btu cu ft Specific gravity 0 62 Therefore Orifice No 43 Manifold pressure 3 3...

Page 13: ...43 3 4 Canada 925 43 2 9 43 3 0 43 3 1 43 3 2 43 3 3 Altitudes 950 43 2 7 43 2 8 43 2 9 43 3 0 43 3 1 2000 975 43 2 6 43 2 7 43 2 8 43 2 9 43 2 9 to 1000 43 2 5 43 2 5 43 2 6 43 2 7 43 2 8 4500 1025 4...

Page 14: ...8 43 2 9 43 3 0 43 3 1 750 43 2 5 43 2 6 43 2 7 43 2 8 43 2 9 to 775 43 2 4 43 2 5 43 2 5 43 2 6 43 2 7 800 43 2 2 43 2 3 43 2 4 43 2 5 43 2 5 7000 825 43 2 1 43 2 2 43 2 2 43 2 3 43 2 4 850 48 3 7 4...

Page 15: ...RCENT PER 1000 FT ABOVE SEA LEVEL ALTITUDE RANGE FT AVG GAS HEAT VALUE AT ALTITUDE BTU CU FT SPECIFIC GRAVITY OF NATURAL GAS 0 58 0 60 0 62 0 64 0 66 Orifice No Manifold Pressure Orifice No Manifold P...

Page 16: ...h 3 Check pressure switch This control proves operation of draft inducer blower a Turn off 115 v power to furnace b Remove control door and disconnect inducer motor lead wires from wire harness c Turn...

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