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246653-YTG-E-0108
Johnson Controls Unitary Products 15
FIGURE 1 - HOT WATER PIPING CROSS-SEC-
TION
TABLE 12: STATIC RESISTANCE HOT WATER COIL
(1 ROW, 40 TON)
CFM 8000 11000 14000 20000
A
IR PRESSURE DROP 1 ROW 0.11 0.19 0.29 0.52
A
IR PRESSURE DROP 2 ROW 0.23 0.39 0.58 1.06
HOT WATER
COIL
CONDENSING
SECTION
INLET (2")
OUTLET (2")
C
L
2.55"
8.38"
2.25"
11.88"
26"
15.8"
88.75"
HEAT SECTION
COMPARTMENT
(1 OR 2 ROW)
OUTSIDE OF
BASE RAIL
TABLE 13: HOT WATER COIL (1 ROW 40 TON)
1
1.
Based on 60°F entering air temperature, 2.00” maximum pres-
sure drop across the hot water coil.
GPM CFM
C
APACITY (MBH) AT ENTERING WATER
T
EMPERATURE
140 °F 160 °F 180 °F 200 °F
10
8000 102 128.8 155.8 182.9
11000 114 144.1 174.4 205.1
14000 123.2 155.9 188.8 222.1
17000 130.6 165.4 200.4 235.8
20000 136.8 173.3 210.1 247.3
20
8000 116.8 147 177.2 207.7
11000 133.2 167.7 202.3 237.2
14000 146.2 184.2 222.4 260.8
17000 157 197.9 239 280.5
20000 166.2 209.6 253.2 297.3
30
8000 122.8 154.3 185.8 217.5
11000 141.2 177.4 213.8 250.3
14000 155.9 196.1 236.4 276.9
17000 168.3 211.8 255.4 299.3
20000 179.1 225.3 271.8 318.6
40
8000 126.1 158.2 190.5 222.8
11000 145.6 182.7 220 257.5
14000 161.4 202.6 244.1 285.8
17000 174.7 219.5 264.5 309.7
20000 186.3 234.2 282.3 330.6