Burnham 4S Webster Data Sheet

Webster Burner Information

Boiler Burner Motor Firing Standard UL Flame Safeguard Gas Train

Size Model HP Voltage

Sequence

[1]

Gas #2 Oil Gas/#2 Oil

Size

[2]

Min. Pres. Max. Pres.

4S-100 JB2-30 3 230/460/3 L-H-O LFS RM7897C/UV RM7897C/UV RM7897C/UV

21/2

10" w.c. 28" w.c.

4S-125 JB3-50 5 230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV

21/2

16" w.c. 28" w.c.

4S-150 JB3-50 5 230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 10" w.c. 28" w.c.
4S-175 JB3-75

71/2

230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 14" w.c. 28" w.c.

4S-200 JB3-75

71/2

230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 18" w.c. 28" w.c.

4S-250 HDS5-50A 5 230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 23" w.c. 28" w.c.
4S-300 HDS5-75A

71/2

230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 1.3 psig 10 psig

4S-350 HDS5-75A

71/2

230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 1.7 psig 10 psig

4S-400 HDS5-100B 10 230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV

21/2

2.2 psig 10 psig

4S-500 HDS5-150B 15 230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 3.4 psig 10 psig
4S-600 HDS7-200B 20 230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 2.3 psig 10 psig
4S-700 HDS7-250B 25 230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 3.2 psig 10 psig
4S-800 HDS9-300B 30 230/460/3 Full Mod RM7840L/UV RM7840L/UV RM7840L/UV 3 4.4 psig 10 psig

[1] Explanation of Firing Sequences:

Gas and Gas Sequence on Combination Gas/Oil Boilers

L-H-O LFS Low fire start (not proven), high fire run, air control by linkage to motorized gas valve.
Full Mod Full modulation with proven low fire start, synchronized fuel/air control by modulating motor.

Oil and Oil Sequence on Combination Gas/Oil Boilers

On-Off LFS Low fire start (not proven), high fire, oil cylinder air control. Reduced input start with by-pass.
Full Mod Full modulation with proven low fire start, synchronized fuel/air control by modulating motor. With oil metering

valve and oil pressure regulating valve.

[2] Gas trains for 400 hp and larger boilers are Siemens.

SERIES 4S