Figure 17. Vent Terminal (Low Ground Clearance).
Maximum Vent Length Determination
Table 4. Power Vent Maximum Vent Length
119 GAL
INPUT
(BTUH)
Max Vent
Length (feet)
3"
Max Vent
Length
(feet) 4"
Max Vent
Length (feet)
6”
399,999
N/A
120
240
499,999
N/A
120
240
Determining required vent length
1. Determine the total length of straight vent pipe (in feet) required.
2. Add 5 feet of venting for every 90° elbow.
3. Add 2 ½ feet of venting for every 45° elbow.
4.
Total vent length cannot exceed “Max. Vent Length” in Table 4.
Example of Total Vent Length for 120T400 with a power vented installation
A 3” venting system has a total of six 90-degree elbows and a total straight pipe length of 55 feet.
Equivalent vent length for elbows: 6 x 5 feet = 30 feet.
Total equivalent vent distance = 55 feet + 30 feet = 85 feet total equivalent vent length. This is below the
maximum allowed distance of 120 feet for this model using 3” vent
.
NOTICE
Do not include the 4” condensate elbow or vent terminals in determining maximum vent length.
28
Содержание 120T400
Страница 38: ...LIGHTING AND SHUT DOWN INSTRUCTIONS Figure 26 Lighting Instruction Label 38...
Страница 59: ...NOTES 59...
