Carrier 58MEC Operations Instructions Page 59
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Table 16 – Altitude Derate Multiplier for U.S.A.
ALTITUDE
FT (M)
PERCENT OF
DERATE
DERATE MULTIPLIER
FACTOR*
0–2000
(0---610)
0 1.00
2001–3000
(610---914)
4 --- 6 0.95
3001–4000
(914---1219)
6 --- 8 0.93
4001–5000
(1219---1524)
8 --- 1 0 0.91
5001–6000
1524---1829)
10---12 0.89
6001–7000
(1829---2134)
12---14 0.87
7001–8000
2134---2438)
14---16 0.85
8001–9000
2438---2743
16---18 0.83
9001–10,000
2743---3048
18---20 0.81
* Derate multiplier factor is based on midpoint altitude for altitude range.
Table 17 – Gas R ate (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
360 720 1800
50
72 144 360
11
327 655 1636
51
71 141 355
12
300 600 1500
52
69 138 346
13
277 555 1385
53
68 136 340
14
257 514 1286
54
67 133 333
15
240 480 1200
55
65 131 327
16
225 450 1125
56
64 129 321
17
212 424 1059
57
63 126 316
18
200 400 1000
58
62 124 310
19
189 379 947
59
61 122 305
20
180 360 900
60
60 120 300
21
171 343 857
62
58 116 290
22
164 327 818
64
56 112 281
23
157 313 783
66
54 109 273
24
150 300 750
68
53 106 265
25
144 288 720
70
51 103 257
26
138 277 692
72
50 100 250
27
133 267 667
74
48 97 243
28
129 257 643
76
47 95 237
29
124 248 621
78
46 92 231
30
120 240 600
80
45 90 225
31
116 232 581
82
44 88 220
32
113 225 563
84
43 86 214
33
109 218 545
86
42 84 209
34
106 212 529
88
41 82 205
35
103 206 514
90
40 80 200
36
100 200 500
92
39 78 196
37
97 195 486
94
38 76 192
38
95 189 474
96
38 75 188
39
92 185 462
98
37 74 184
40
90 180 450
100
36 72 180
41
88 176 439
102
35 71 178
42
86 172 429
104
35 69 173
43
84 167 419
106
34 68 170
44
82 164 409
108
33 67 167
45
80 160 400
110
33 65 164
46
78 157 391
112
32 64 161
47
76 153 383
116
31 62 155
48
75 150 375
120
30 60 150
49
73 147 367
124
29 58 145
SET TEMPERATURE RISE
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit component
damage.
Temperature rise must be within limits specified on furnace
rating plate. Recommended operation is at midpoint of rise
range or slightly above.
CAUTION
!
Place SW-1 in ON position. Jumper R to W/W1 and W2 to check
high-gas-heat temperature rise. To check low-gas-heat
temperature rise, remove jumper to W2. Determine air
temperature rise for both high and low gas heat. Do not exceed
temperature rise ranges specified on unit rating plate for high and
low g as heat.
This furnace must operate within the temperature rise rang es
specified on the furnace rating plate. Determine the air
temperature as follows:
a. Place duct thermometers in return and supply ducts as
close to furnace as possible. Be sure thermometers do
not “see” heat exchangers so that radiant heat does 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.
If the temperature rise is outside this range, check the following:
a. Gas input for low-and high gas heat operation.
b. Derate for altitude if applicable.
c. Return and supply ducts for excessive restrictions
causing static pressures greater than 0.50-IN. WC.
d. Adjust temperature rise by adjusting blower speed.
Increase blower speed to reduce temperature rise.
Decrease blower speed to increase temperature rise.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Disconnect 115-v electrical power before changing speed tap.
!
WARNING
For low-heat, the following connections can be made at LO-HT
on control:
a. Speed 2 (Orange)
b. Speed 1 (Red) -- Factory Setting
58MEC
- Installation, Start---up and 1
- Operating Instructions 1
- IMPORTANT 2
- TABLE OF CONTENTS 3
- SAFETY CONSIDERATIONS 3
- CODES AND STANDARDS 5
- Fig. 3 -- Dimensional Drawing 6
- 335122-201 REV. B LIT TOP 7
- INTRODUCTION 8
- APPLICATIONS 8
- CONDENSATE TRAP TUBING 11
- Applications 12
- (146 mm) 14
- IN. (146mm) 15
- LOCATION 16
- Equipment 17
- Step 3 -- Hazardous Locations 17
- 18-IN. (457.2 mm) 18
- MINIMUM TO BURNERS 18
- 6" MIN 20
- INSTALLATION 21
- Step 4 -- Air Ducts 22
- DUCTWORK ACOUSTICAL TREATMENT 23
- SUPPLY AIR CONNECTIONS 23
- RETURN AIR CONNECTIONS 23
- Step 5 -- Filter Arrangement 25
- FRONT FILLER 26
- Typical Gas Pipe Arrangement 28
- Common Vent Systems 30
- DIRECT VENT/2-PIPE SYSTEM 31
- NON-DIRECT VENT/1-PIPE SYSTEM 31
- MATERIALS 31
- Fig. 36 -- Wiring Diagram 32
- COMBUSTION AIR PIPE 33
- L1 BL-1 PR-1 34
- VENT PIPE 37
- CASING WIDTH A 38
- GAS LINE 42
- (102 mm) 43
- VENT TERMINATION 44
- Abandoned masonry 45
- (per code) 45
- Step 11 -- Condensate Drain 46
- START-UP ADJUSTMENT AND 47
- SAFETY CHECK 47
- Step 3 -- Purge Gas Lines 48
- THERMOSTAT (ADAPTIVE 49
- NOTES FOR FIG. 50--57: 53
- OM-24v terminals are jumpered 54
- Step 5 -- Adjustments 55
- BURNER FLAME 58
- MANIFOLD 58
- SET TEMPERATURE RISE 59
- SETTHERMOSTATHEATANTICIPATOR 60
- CHECKLIST 61
- Replaces: NEW 62
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