Series Premier VS-VH
Page 57
LT135 Dec 2019
5 – Burner adjustment
1. Now we are ready to start up the burner. Before plugging in the burner, take the cap off the Maxitrol Zero
Regulator. Refer to Figure 50 below to locate Zero Regulator.
Figure 50: Maxitrol Zero Regulator
NOTE
: The Maxitrol Zero Regulator takes the incoming gas pressure and reduces it down to zero. The gas valve is
set to a specific setting so that it acts mostly just like a gate valve, open and closed. The gas pressure is knocked
down to zero, the gas valve opens and the vacuum sucks in the amount of fuel it needs. You never want to adjust
the gas valve. We make all fuel adjustments with the Zero Regulator
ONLY
.
NOTE:
These burners are at their optimum performance when they are
burning their leanest
(least amount of fuel
possible but still lit). When they are running rich they can make high pitch harmonic noises.
2. The zero regulators come factory set as shown in Figure 51. Make sure the one you are working on has not
been tampered or set incorrectly.
3. Make sure the gas supply line has been purged then plug in the burner to the main 115V supply.
NOTE:
Once plugged in, the burner will wait the 30 seconds that is set from the dip switch and then try to light. In
some conditions the burner will light, some may not light, and some may light intermittently.
