Ordering Information | 4011/4021 Pilot
Table 3
4011-# Set Includes: 4021-# pilot tip, 4031
4021-# Pilot Tip Includes: 4021-# pilot tip, with
Ignition
Pilot Tip Exit
1122-0, 1821B-02
Ignition Plug
Connection Type
Type
4011-11 4011-12 4011-13 4011-14 4011-15 4011-16
4021-11 4021-12 4021-13 4021-14 4021-15 4021-16
Manual Light Spark Ignited Manual Light Spark Ignited Manual Light Spark Ignited
¾ " NPT
1" Ø Slip Fit
1 1⁄8 " Ø Slip Fit
Two of many possible piping configurations are shown below and to the left. A tip can be screwed directly into a 4031 Mixer.
AIR
GAS
4011 Pilot Set with piping, including a union.
4011 Pilot Set with 4041 Universal Pilot Fitting, 7350 Regulator, and piping.
OPTIONAL NORTH AMERICAN PILOT ACCESSORIES
7350- -A and 7350 Pilot Ratio Regulator See Bulletin 7350 for more detailed information.
When to use the 7350-01-A or -02-A
- The 7350-_-A provides better air/fuel ratio control when used as a cross connected ratio regulator. This is because it delivers a lower gas pressure to the mixer, which makes the gas adjustment screw less sensitive.
Maximum Inlet Pressure*: 7350- -A: 1 psi, 7350: 5 psi *For CSI compliant systems inlet must be less than 0.5 psi Outlet Pressure Range: 7350- -A: 1.5"w.c. to 1"w.c. 7350: 3"w.c. to 6"w.c. Gases: Natural, LP, LP gas-air
- The 7350-_-A must be piped horizontally, and the maximum inlet gas pressure to the 7350-_-A is 1 psi.
pres. drop across regulator, "w.c. Table 4
When to use the 7350-01 or -02
Capacity, scfh
- The 7350-01 or -02 can be used with up to 5 psi inlet pressure. - The 7350-01 or -02 can be piped in any orientation.
of 0.6 gravity gas
0.1 54 60 54 60
0.2
0.3
7350-02-A 7350-01-A
77 85 77 85
95
105
For both regulators
7350-02 7350-01
95
105
The inlet pressure to the pilot gas ratio regulator must be at least 3.5"w.c., (2 osi or 20 mbar) greater than the cross-connected pressure (at the pilot air or mixture tap). In most applications this will be 0.5 to 1.0 psi.
1⁄8 " NPT(F) vent
Bulletin 4011/4021 Page 5
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