
Eclipse RatioMatic v3.10 - Design Guide No. 110, 12/01
Ignition Gas Piping
RatioMatics are capable of ignition with either low fire or
bypass start gas.
Low Fire Start:
Main gas
shut-off
valve train
Bypass Start Gas (optional):
Main gas
shut-off
valve train
NC
An optional fuel orifice meter connected in the start gas piping
can simplify start-up and adjustment. To start the burner at the
lowest possible gas input, select a fuel orifice meter for 5” to 10”
w.c. pressure drop when the gas flow is at the burner’s rated low
fire.
15
Step 4: Ignition System
(continued)
Optional fuel orifice meter recommended
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