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LTD HEATER INSTALLATION
LOW TEMPERATURE HEATER SPECIFICATIONS
All models
Vapor models
Maximum fuel flow (GPH)
Modulating valve bypass orifice
Minimum operating pressure
Maximum operating pressure
Natural gas
models
Modulating valve bypass orifice
Minimum operating pressure
Maximum operating pressure
Inside diameter
Bolt circle diameter
Length
BTU rating
Weight
Orifice
Minimum line size
Maximum fuel flow (CFH)
Orifice
Minimum line size
18"
18.5/16"
19.7/16"
22"
400000
81
167
5/64"
Red
2
20
3/8"
421
9/64"
Yellow
1
7
1/2"
15
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