Burner Settings - Heat Wise SU-2A Manual

Refer to the below charts for the proper settings for the SU-2A burner and PNA boiler. Note: a
pressure change at the valve, and, in some cases, an orifice change, is all that is required to
convert a natural gas burner to a LPG (propane) unit and vice-versa.
Boiler Model Burner
DK2-3 SU-2A
DK2-4 SU-2A
DK2-5 SU-2A
DK2-6 SU-2A
DK2-7 SU-2A
DK2-8 SU-2A

BURNER SETTINGS

Chart 3: Heat Wise Burner Settings for
PNA DK-2 Series Boilers (Gas & LPG)
Fuel Input
Nat. Gas 98,000
Propane 98,000
Nat. Gas 140,000
Propane 140,000
Nat. Gas 175,000
Propane 175,000
Nat. Gas 194,000
Propane 194,000
Nat. Gas 224,000
Propane 224,000
Nat. Gas 250,000
Propane 250,000
Orifice Head Air
7/32" 21 0.5
7/32" 20 0.5
1/4" 16 5
1/4" 16 5
19/64" 15 11
19/64" 15 11
21/64" 13 13.25
21/64" 13 13.75
27/64" 11 16
27/64" 11 16.25
none 3 15
none 3 15
7
Manifold
Pressure ("W.C.)
3.5
2.3
3.5
1.8
3.5
2.2
3.5
2.3
3.5
2.3
3.5
2.3