Trane 4YCZ6024A1060A Installation And Operation Manual page 22

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
• 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
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.
6. Multiply the final figure by the heating value of the
gas obtained from the utility company and compare
Outlet Pressure Boss
Inlet Pres
sure Boss
Gas Valve
ON/OFF
High Fire Coil
Toggle
Terminal (H)
Switch
Table 11. Gas Flow (in cfh)
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
Figure 6. Burner and Valve
2nd Stage (HI)
Manifold Pressure
Adjustment
Regulator
Vent
1st Stage (LO)
Manifold
Pressure
Adjustment
Coaxial Coil
Terminal (M)
Common
Terminal (C)
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
66 109 116 62
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.
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.
Table 11. Gas Flow (in cfh) (continued)
Sec. Flow Sec. Flow
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
H H i i g g h h A A l l t t i i t t u u d d e e I I n n s s t t a a l l l l a a t t i i o o n n
Unit nameplate ratings are based on equipment
operation from sea level to 2000 feet elevation above
sea level. No orifice changes required for high altitude
installation, please refer to below chart for rating
information.
Sec. Flow Sec. Flow
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
18-EB28D1-12C-EN