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Model JB3 - Specification Data
(1)
STANDARD UL
EQUIPMENT
AND IMPORTANT OPTIONS
Motor, Fan and Air Inlet Control
Air Flow Switch
(2)
Burner Mounted Control Panel,
Switch and Four Indicator Lights
Flame Safety Control
Ultra Violet Scanner
Motor Starter with Overloads
Fuel Selector Switch
Proven Gas Pilot Ignition
Pilot Solenoid Gas Valve
Pilot Gas Regulator & Manual Valve
Pilot Gas Ignition Transformer
Inverted Housing
Alternate Control Cabinet Positioning
Remote Control Panel
Fuel Metering CAM-NETIC II
Posi-Control
1. The configuration of each unit will vary with specific job requirements such as input rating, electrical specification and special agency approval codes.
The above chart shows those items standard to a basic burner plus a few options that may be added.
2. Indicator lights are "Power On", "Call for Heat", "Fuel On" and "Flame Fail".
Model JB3 - Sizing and Application Data
Model
Maximum
Burner Firing Capability Range
Number
Furnace
Gas scfh
Pressure
JB3-30
3.5
1400 / 6300
JB3-50
3.5
1400 / 8300
JB3-75
3.5
1600 / 10500
JB3-100
3.5
1800 / 12600
The above maximum ratings are based on 0 furnace pressure, an altitude of 1000 feet, 90 o F air temperature and 60 HZ electrical supply. Use the follow-
ing corrections for higher temperatures and altitude. Capacity by 17% for 50 Hertz.
Capacity decreases by 4% for each 1000 feet above 1000 foot altitude.
Capacity decreases by 6% for each 1 inch of furnace pressure.
Capacity decreases by 2% for each 10 o F increase in air temperature over 90 o F.
Gas input ratings based on 1000 BTU/cu ft. and 0.64 specific gravity. Sizes and pressure will vary with gas.
Oil input ratings are based on 140,000 BTU/gal. for ASTM #2 fuel oil and 150,000 BTU/gal for ASTM #4-6 fuel oil.
The vessel draft must be between -0.1 and +0.1 wc.
Essential Ordering Information and Data:
Power Supply - Confirm 120-60-1 for control circuit and electrical supply for burner motor(s) (voltage, frequency and phase).
Describe Boiler or Heater to be Fired - Including the manufacturer, model number, furnace pressure and furnace size.
Firing Rate - Define firing rates in MBH for gas and GPH for oil.
Fuel to be Burned - Type of gas and/or oil, including the BTU value.
Approval Agency - UL, FM, IRI (GE GAP), CSD-1, NFPA, Mil spec and local codes, if applicable.
Flame Safety Control Preferred - Honeywell or Fireye controls.
Gas Train Components Preferred - ASCO/ITT, Honeywell or Landis
Control System - ON-OFF, Low Fire Start, Low High Low, Modulation, Posi-Control
Required Options - Mounting plate, operating controls, limit controls, etc.
JB Manual
(12,600 MBH Maximum Input)
No. 2 Oil
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Duel Fuel Burners Only
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
(contact Webster for complete information)
Burner
Motor
#2 Oil
#4-6
HP
gph
Oil gph
10.2 / 45
10 / 42
3
11 / 59.2
10 / 55.3
5
12.3 / 75
11 / 70
7 1/2
20.3 / 90
12 / 84
10
Page 10
STANDARD UL EQUIPMENT
AND IMPORTANT OPTIONS
Main Manual Shutoff Valve
Main Safety Shutoff Valve
Second Safety Shutoff Valve
Main Gas Regulator
Gas Checking Valve
High and Low Gas Pressure Switches
Metering Valve (modulating systems)
Normal Open Vent Valve (above
12,500 MBH)
Oil Drawer Assembly with Diffuser
Oil Nozzles
Oil Heater with Integral Thermostat
Remote Oil Pump
Two Safety Shutoff Valves
High Oil Temperature Switch
Low Air Atomizing Switch
Low Oil Pressure Switch
Oil Pressure Gauge
Oil Metering Valve
Future Gas Combustion Head
Air Compressor
Gas Train
#2 Oil Pump Motor HP
Pipe
Inlet
Pressure
Size
Press
Atomizing
2 1/2"
12 / 27"
1
3"
15 / 27"
1 1/2
3"
23 / 27"
1
3"
2-5 psi
1
No. 2 Oil
X
X
X
X
X
X
X
X
X
X
X
X
X
Opt.
X
X
X
X
X
X
X
X
Opt.
Opt.
X
#4 - 6
Pump
Compressor
Air
Motor HP
Motor HP
Atomizing
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Specification
X
X
X
Opt.
X
X
X
X
X
X
Opt.
X
Air
2
2
2
2
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