Adjustment, Start & Stop; Modulating Gas & Air Ratio System - Eclipse Furnnox 210 Series Installation Manual

Adjustment, Start &
Stop
In this chapter you will find instructions on how to adjust a
system, and how to start and stop a system.
■ Do not bypass any safety feature. You can cause
fires and explosions.
Modulating Gas & Air Ratio System
If you adjust an on-ratio system for the first time, you must
follow these steps:
Step 1: Reset the System
1. Close the automatic gas valves and gas cocks.
2. Fully open the manual air butterfly valve at each burner.
a.Drive the automatic zone air control valve to high
fire.
b.Adjust the automatic zone air control valve so that it
is fully open.
3. Start the blower.
NOTICE
■ Make sure that the blower rotates in the correct
direction. If incorrect, have a qualified electrician
rewire the blower to reverse its rotation.
4. Adjust the eductor flow valve to set the flow measured
across the orifice to the flow specified by Eclipse for
your application.
Step 2: Set High Fire Air
1. Set the system to high fire, but DO NOT ignite the
burner(s).
2. Use the orifice flow data (provided by orifice
manufacturer) to determine the pressure drop across
the orifice necessary for high fire air flow.
NOTE: If using single diaphragm ratio regulator control,
set air flow to 35% excess air to account for temperature
changes in combustion air.
3. Set high fire air using the manual combustion air
butterfly to achieve the pressure differential determined
in Step 2.
Eclipse Furnnox Burner, V1, Installation Guide 210, 2/14/2011
DANGER
NOTE: A pressure tap is open when the screw inside the
tap is unscrewed approximately half a turn.
Figure 4.1. Set High Fire Air
NOTE: Insulated Body Furnnox Burners do not have a
Tap(s) A. For insulated housing version, use pressure
taps in supply lines to the burner(s).
Burner system:
a.Standard Version, open all pressure tap(s) A.
Insulated Housing Version, use pressure taps in
the supply lines to the burner.
b.Measure and note the static pressure at Tap A for all
the burners.
c.If all the measured static pressures are within 0.3"
w.c. (0.75 mbar) of each other, then proceed to the
next section. If the variation is greater than 0.3" w.c.
(0.75 mbar) it will be necessary to adjust the manual
air butterfly valve at each burner to improve the
balance.
d.Make sure that all the pressure taps are closed.
4. Repeat the proceeding for other zones (if any).
4
Tap A
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