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7
iN401 - iN501 Technical Specifications
May
2019
-
Revision
00
3.4 Connection Specifications
Connections
Description
Specification
2
Gas
Supply
Inlet
Connection
1-1/2” NPT
Water
Supply
Inlet
Connection
1-1/2” NPT
Heated
Water
Outlet
Connection
1-1/2” NPT
Exhaust Gas Vent
1
4” Polypropylene
Air
Intake
Inlet
1
4” Polypropylene
Condensate
Drain
Connection
3/4”
Power Supply
120V
AC
Power, Max. 9.5A
1
Use the 4” adapter provided when using PVC or CPVC pipe.
2
Using sizes other than specified can cause damage to the water heater
and will void the warranty.
3.5 Exhaust Gas Standards
CO
2
and CO Standards
Description
CO
2
Range (%)
Max. CO Level (ppm)
Natural Gas
High Fire
9.1% to 9.3%
< 200 ppm
Low Fire
9.1% to 9.3%
< 60 ppm
Propane Gas
High Fire
10.1% to 10.5%
< 200 ppm
Low Fire
10.1% to 10.5%
< 60 ppm