Navien NPE-180A User manual

To determine the size of a common vent:
Venting Intake and Exhaust to Di erent Locations
●
Venting Intake andExhaust to the Same Location
●
12" (300mm) min.
12" (300mm) min.
36" (900mm) min.
Exhaust
Intake
Cap
Condensate
Drain
W
D
H
Exhaust
Intake
Condensate
Drain
Exhaust
Intake
Cap
Condensate
Drain
Model : NPE-180(A,S)/ 210(A,S)/ 240(A,S)
Common Venting Guide
Condensing Water Heater
When cascading the water heaters with other Navien water
heaters, you can install a common venting system. Do not use
common venting if the water heater is used in a cascading system
with other manufacturer’s water heaters. Include a condensate
drain in the main trunk as illustrated in the following examples.
1. Add the BTU/H input ratings for each water heater in the
cascading system to determine the total BTU/H rating.
2. Determine the total length (L) of the common vent, which
consists of the horizontal width (W) and the vertical height
(H): Total length (L) = W + H.
The following are examples of common venting options:
Venting the Exhaust Only (Non-Direct)
●
Intake
Exhaust
Cap
Condensate
Drain
W
D
H
DANGER
Improper DIPswitch settings can cause severe personal
injury, death or substantial property damage.
Switch Function Setting
1 Cascade Vent
Common Vent
1-ONIndividual Vent
1-OFF
ONON
1 2 3 4 5 6 7 8 9 10 1 2
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CAUTION
3. Refer to the common vent table below to determine the maximum allowable lengths for the common vent, based on the total
BTU/H rating, and the diameter of the vent pipe.
Note
Regardless of the vent size listed in the table, the connection to the common vent must always be as large as the largest connector.
If the largest connector and the recommended vent are the same size, use the next largest size for the vent.
For each short radius elbow that will be used in the vent, add 8 feet (2.4 m) to the total length. For each long radius
elbow that will be used in the vent, add 5 feet (1.5m) to the total length.
Total length (L) = W + H
Required Load
(Total BTU/H)
Model Total length (ft)
NPE-180A NPE-210A NPE-240A D= 3" D=4" D=5" D=6"
300,000 2 60(18m) 100(30m) 160(48m) -
330,000 1 1 60(18m) 100(30m) 160(48m) -
360,000 2 60(18m) 100(30m) 160(48m) -
379,000 1 1 60(18m) 100(30m) 160(48m) -
398,000 2 60(18m) 100(30m) 160(48m) -
540,000 3 70(21m) 110(33m) 160(48m)
559,000 2 1 70(21m) 110(33m) 160(48m)
578,000 1 2 70(21m) 110(33m) 160(48m)
597,000 3 70(21m) 110(33m) 160(48m)
D=5" D=6" D=7" D=8"
739,000 3 1 80(24m) 120(37m) - -
758,000 2 2 80(24m) 120(37m) - -
777,000 1 3 80(24m) 120(37m) - -
796,000 4 80(24m) 120(37m) - -
995,000 5 60(18m) 90(27m) 130(40m) -
1,194,000 6 - 80(24m) 100(30m) 140(43m)
1,393,000 7 70(21m) 90(27m) 120(36m)
D=7" D=8" D=9" D=10"
1,592,000 8 82(25m) 107(33m) 135(41m)
1,791,000 9 73(22m) 95(29m) 120(37m) 148(45m)
1,990,000 10 65(20m) 85(26m) 108(33m) 133(41m)
2,189,000 11 78(24m) 98(30m) 121(37m)
2,388,000 12 71(22m) 90(27m) 111(34m)
D=9" D=10" D=11" D=12"
2,587,000 13 83(25m) 103(31m) 124(38m)
2,786,000 14 77(23m) 95(29m) 115(35m) 137(42m)
2,985,000 15 72(22m) 89(27m) 108(33m) 128(39m)
3,184,000 16 68(21m) 83(25m) 101(31m) 120(36m)
Rev. 6/15
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