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Regency
®
U39 ULTIMATE Direct Vent Freestanding Gas Stove
AERATION
ADJUSTMENT
The burner aeration is factory set but may need
adjusting due to either the local gas supply or
altitude.
U39 with 38,000 Btu/h
U39-NG1 Natural Gas: 1/4" open
U39-LP1 Propane: 1/2" open
U39 with 30,000 Btu/h
U39-NG1 Natural Gas 3/16" open
U39-LP1 Propane 3/8" open
The aeration adjustment gears are located on
the right side of the burner box and can be
accessed from the side or from the front when
the louvers are removed.
To adjust the aeration: use the allen key to turn
the turning gear which will adjust the air shutter.
Open the air shutter for a blue fl ame or close it
for a yellower fl ame.
Caution: Carbon will be produced if the air
shutter is closed too much.
Note: Any damage due to carboning
resulting from improperly setting
the aeration controls is NOT covered
under warranty.
Note: Aeration Adjustment should only be
performed by an authorized Regency
®
Installer at the time of installation or
service.
INSTALLATION
Clockwise to open,
counter-clockwise to close.
Valve Description
1) Gas on/off knob
2) Manual high/low adjustment
3) Pilot Adjustment
4) Thermocouple Connection
5) Main Operator
6) Outlet Pressure Tap (Manifold Pressure)
7) Inlet Pressure Tap (Supply Pressure)
8) Pilot Outlet
9) Main Gas Outlet
10) Flange Securing Screw Holes
11) Alternative TC Connection Point
12) Thermoelectric Unit
13) Additional Valve Mounting Hole