Start-Up And Adjustment; High Altitude Derate; Preliminary Inspections; Lighting Instructions - Trane UC SERIES Installer's Manual

Installer's Guide
TABLE 10
GAS FLOW IN CUBIC FEET PER HOUR
2 CUBIC FOOT DIAL
SEC. FLOW SEC. FLOW SEC. FLOW SEC. FLOW
8 900 29 248
9 800 30 240
10 720 31 232
11 655 32 225
12 600 33 218
13 555 34 212
14 514 35 206
15 480 36 200
16 450 37 195
17 424 38 189
18 400 39 185
19 379 40 180
20 360 41 176
21 343 42 172
22 327 43 167
23 313 44 164
24 300 45 160
25 288 46 157
26 277 47 153
27 267 48 150
28 257 49 147
The following warning complies with State of California law, Proposition 65.
▲
WARNING
!
Hazardous Gases!
Exposure to fuel substances or by-products of incomplete
fuel combustion is believed by the state of California to
cause cancer, birth defects, or other reproductive harm.
TABLE 11
FINAL MANIFOLD PRESSURE SETTINGS
FUEL
NATURAL GAS
LP GAS
TABLE 12
PART NUMBERS FOR REPLACEMENT ORIFICES
DRILL PART
SIZE NUMBER
44 ORF00501
45 ORF00644
46 ORF00909
47 ORF00910
48 ORF01099
49 ORF00503
50 ORF00493

HIGH ALTITUDE DERATE

Input ratings (BTUH) of these furnaces are based on sea level
operation and should not be changed at elevations up to 2,000 ft.
If the installation is 2,000 ft. or above, the furnace input rate
(BTUH) shall be reduced 4% for each 1,000 ft. above sea level.
The furnace input rate shall be checked by clocking the gas flow
rate (CFH) and multiplying by the heating value obtained from
the local utility supplier for the gas being delivered at the
installed altitude. Input rate changes can be made by adjusting
the manifold pressure (min 3.0 - max 3.7 in. W.C. - Natural Gas)
or changing orifices (orifice change may not always be required).
22
50 144 82 88
51 141 84 86
52 138 86 84
53 136 88 82
54 133 90 80
55 131 92 78
56 129 94 76
57 126 96 75
58 124 98 73
59 122 100 72
60 120 104 69
62 116 108 67
64 112 112 64
66 109 116 62
68 106 120 60
70 103 124 58
72 100 128 56
74 97 132 54
76 95 136 53
78 92 140 51
80 90 144 50
PRESSURE
3.5" W.C.
11.0" W.C.
DRILL PART
SIZE NUMBER
54 ORF00555
55 ORF00693
56 ORF00907
57 ORF00908
58 ORF01338
59 ORF01339
If the desired input rate cannot be achieved with a change in
manifold pressure, then the orifices must be changed. LP
installations will require an orifice change. See Table 13 for help
in selecting orifices if orifice change is required. Furnace input
rate and temperature rise should be checked again after chang-
ing orifices to confirm the proper rate for the altitude.
Installations above 4,000 feet may require a pressure switch
change. If required, use the BAYHALT*** Kit (High Altitude
Accessory Kit) listed in PRODUCT DATA.
TABLE 13
Orifice
ALTITUDE ABOVE SEA LEVEL
Twist Drill
Size If
and Orifice Required At Other Elevations
Installed
At Sea
2000 3000 4000 5000 6000 7000 8000 9000 10000
Level
42 42 43 43
43 44 44 44
44 45 45 45
45 46 47 47
46 47 47 47
47 48 48 49
54 54 55 55
55 55 55 55
56 56 56 57
57 58 59 59
58 59 60 60
From National Fuel Gas Code - Table F-4

START-UP AND ADJUSTMENT

PRELIMINARY INSPECTIONS

With gas and electrical power "OFF"
1. Duct connections are properly sealed
2. Filters are in place
3. Venting is properly assembled
4. Blower door is in place
Flip the switch on the main gas valve within the unit to the
"OFF" position. Turn the external gas valve to "ON". Purge the
air from the gas lines. After purging, check all gas connections
for leaks with a soapy solution — DO NOT CHECK WITH AN
OPEN FLAME. Allow 5 minutes for any gas that might have
escaped to dissipate. LP Gas being heavier than air may require
forced ventilation. Flip the switch on the gas valve in the unit to
the "ON" position.

LIGHTING INSTRUCTIONS

▲
WARNING
!
DO NOT attempt to manually light the burner. Failure to follow
this warning could result in property damage, personal injury,
or death.
Lighting instructions appear on each unit. Each installation
must be checked out at the time of initial start up to insure
proper operation of all components. Check out should include
putting the unit through one complete cycle as outlined below.
Turn on the main electrical supply and set the thermostat above
the indicated temperature. The ignitor will automatically heat,
then the gas valve is energized to permit the flow of gas to the
burners. After ignition and flame is established, the flame
control module monitors the flame and supplies power to the gas
valve until the thermostat is satisfied.
43 44 44 45 46 47
45 45 46 47 47 48
46 47 47 48 48 50
47 48 48 49 49 50
48 48 49 49 50 51
49 49 50 50 51 52
55 55 55 56 56 56
56 56 56 56 56 57
57 57 58 59 59 60
60 60 61 62 63 63
61 62 62 63 63 64
18-CD19D5-10