Installation/Lighting | 4020 Nozzle-Mix Pilot Tip
SUGGESTED PIPING ARRANGEMENT FOR 4020-0-HP (WITH ORIFICE)
SUGGESTED PIPING ARRANGEMENT FOR 4020-LP
Pressure gauges or taps
3/4 " Observation port
Observation port
Air flow adjustment
P
Air pres. = >4.0 osi
Air from burner body = 0.1-1.0 osi
Orifice/valve
P
Gas
Limiting orifice gas valve Gas pressure = 3x-6x air pressure
P
Small needle valve
SUGGESTED PIPING ARRANGEMENT FOR 4020-HP/CB
R240-2465 10 X 1.0 IGNITER The R240-2465 spark plug has a 10mm thread and 1/4" terminal, and includes metal gasket. One is included with each 4020 pilot.
Pressure gauges or taps
Observation port
P
Air pres. = 4.0-16 osi
Limiting orifice gas valve Gas pressure = air pressure at approx. 100% excess fuel
M10 x 1
1/4" terminal
LIGHTING "HP"
LIGHTING "LP"
1. Close all fuel supply lines.
1. Close all fuel supply lines.
2. Set the burner to the conditions where the pilot will normally be started (low fire lighting condition). Set the air pressure at the tip to 6.0 osi/10"w.c./26 mbar to 12 osi/21"w.c./52mbar. 3. If a cross connected ratio regulator is installed, open the gas limiting orifice valve to 100% open. If there is no cross con- nected ratio regulator set the gas pressure so that it equals the air pressure (see capacity chart).
2. Set the burner to the conditions where the pilot will normally be started (low fire lighting condition). Set the air pressure at the tip.
3. Supply an ignition source to the spark plug and open the gas until the pilot tip lights.
4. Set the gas so that the pilot flame is large enough to light the burner reliably (gas pressures 2-6 times higher than the air pressure are recommended).
4. Supply an ignition source to the spark plug and open the main pilot gas valve.
5. Make flame adjustments using the gas limiting orifice valve or air valve, if necessary. Set the gas so that the pilot flame is large enough to light the burner reliably.
Bulletin 4020 Page 6
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