L.B. White Pilot - Manual (Page 31)

Variable Heat Output
Operation
Instructions
3.2-1 1
1. Some models of propane (LP) gas or natural gas
heaters have a throttle valve for varying heat output
located between the gas control valve and gas
manifold assemblies. THIS IS NOT A MANUAL GAS
SHUT OFF VALVE.
2. The throttle valve can be adjusted to deliver either
minimum heat or maximum heat. Become
familiarized with the design of the throttle valve in your
heater. Refer to the illustrations below to determine
valve location and how to adjust the heat output.
August 1999
Handle
Parallel
MAXIMUM HEAT
MINIMUM HEA
T
75% OF MAXIMUM
90% OF MAXIMUM
Handle
Turned 9 90º
MANIFOLD
I
N
C
R
E
A
SE
CR
E
E
S
A
E
D