Trane 4YCC4024A1060A Installer's Manual page 21

• 1 Cu. Ft. Dial Gas Flow CFH = Chart Flow
Reading / 2
• 1/2 Cu Ft. Dial Gas Flow CFH = Chart Flow
Reading / 4
• 5 Cu. Ft. Dial Gas Flow CFH = 10X Chart Flow
Reading / 4
6. Multiply the final figure by the heating value of the
gas obtained from the utility company and compare
to the nameplate rating. This must not exceed the
nameplate rating.
7. Changes can be made by adjusting the manifold
pressure.
a. Attach a manifold pressure gauge to the Outlet
Pressure Tap.
Manual
On-Of f
Switch
Regulator Cover Screw
(Adj. screw beneath
this screw)
Vent Post
Outlet
Pressure Tap
Table 9.
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
18-EB31D1-1F-EN
Figure 12. Burner and Valve
Gas V alve
Manifold
Inlet
Pressure
Tap
Orifice
REF. VIEW
(GAS V ALVE)
Sec. Flow Sec. Flow
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
b. Remove the cover screw on top of the gas valve
to access the manifold pressure adjustment
screw.
c. Turn the adjustment screw in to increase the
gas flow rate, and out to decrease the gas flow
rate using a 3/32" hex wrench or flat-head
screwdriver.
N N o o t t e e : : For manifold pressures and orifice sizes for gas
with other BTU ratings, contact the local gas
utility. Manifold pressure should be 3.5 inches
water column (+ 0.1). Input for natural gas must
n n o o t t exceed the value shown on the rating plate.
Burner
Table 9. (continued)
Sec. Flow Sec.
21 343
22 327
23 313
24 300
25 288
26 277
27 267
28 257
S S t t e e p p 4 4 — — U U n n i i t t I I n n s s t t a a l l l l a a t t i i o o n n
REF. VIEW
(3 Burners)
Flow Sec. Flow
42 172 66 109
43 167 68 106
44 164 70 103
45 160 72 100
46 157 74 97
47 153 76 95
48 150 78 92
49 147 80 90
Sec. Flow
116 62
120 60
124 58
128 56
132 54
136 53
140 51
144 50
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