Reznor SC Duct Furnace Unit Installation Manual - Manual (Page 20)

Form I-SC, P/N 207696 R11, Page 20
Installation of the vertical vent and combustion air system on
your separated-combustion unit is complete. Verify compliance
with all venting installation requirements, pages 9-13, and in
FIGURE 18.
FIGURE 18 - Installation of Unit with Vertical Vent Terminal/Combustion Air Inlet (Option CC2)
Rear
View
Side View
6.3 Venting and Combustion Air (cont'd) 6.0 Mechanical
(cont'd) VERTICAL VENT INSTRUCTIONS (cont'd)
6.4 Duct Furnace
Airflow
6.4.1 Pressure Drop and Temperature Rise by Size
The following chart shows the approved temperature rise range with the required CFM
and the internal pressure drop for each size. Maximum static pressure is 2" w.c.
To determine temperature rise, measure the inlet and outlet temperatures at points not
affected by heat radiating from the heat exchanger.
The duct furnace must be installed on the positive pressure side of the field supplied
blower. The air throughput must be within the CFM range stated on the heater rat-
ing plate. The air distribution must be even over the entire heat exchanger. Turning
Model SC Series 6 (80% thermal efficient)
Size 100 125 150 175 200 225 250 300 350 400
Temp Rise CFM P.D. CFM P.D. CFM P.D. CFM P.D. CFM P.D. CFM P.D. CFM P.D. CFM P.D. CFM P.D. CFM P.D.
30°F 2465 1.38 3085 1.39 3700 1.00 4320 1.49 4935 1.14 5555 1.48 6170 1.17 7400 1.61 8640 1.87 9875 1.87
40°F 1850 0.78 2310 0.78 2775 0.56 3240 0.81 3700 0.64 4165 0.83 4630 0.66 5555 0.91 6480 1.05 7400 1.05
50°F 1480 0.50 1850 0.50 2220 0.36 2590 0.52 2960 0.41 3330 0.53 3700 0.42 4440 0.58 5185 0.67 5925 0.67
55°F 1345 0.34 1680 0.41 2020 0.30 2355 0.43 2690 0.34 3030 0.44 3365 0.35 4040 0.48 4710 0.55 5385 0.55
60°F 1235 0.29 1540 0.34 1850 0.26 2160 0.36 2465 0.28 2775 0.37 3085 0.30 3700 0.40 4320 0.46 4935 0.46
70°F 1055 0.21 1320 0.25 1585 0.19 1850 0.26 2115 0.21 2380 0.27 2645 0.22 3175 0.30 3700 0.34 4230 0.34
80°F 925 0.16 1155 0.19 1385 0.14 1620 0.20 1850 0.17 2080 0.21 2315 0.20 2775 0.23 3240 0.26 3700 0.26
85°F 870 0.14 1085 0.18 1305 0.13 1525 0.18 1740 0.15 1960 0.19 2175 0.20 2610 0.22 3050 0.23 3485 0.23
90°F 820 0.12 1025 0.16 1235 0.12 1440 0.16 1645 0.13 1850 0.17 2055 0.18 2465 0.20 2880 0.21 3290 0.21