Transcript Boiler Efficiency and Combustion Control

BurnerMate Universal
A Complete Boiler Control System
Preferred Instruments
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Combustion and control business since 1920.
Only domestic manufacturer of “linkage-less” controls.
Only manufacturer with significant field service department.
Strong network of representatives are boiler/burner/controls
experts.
Preferred Instruments’ new
BurnerMate Universal
“Linkage-less” controller incorporating:
• Flame safeguard control
• Parallel positioning combustion control w/ O2 trim
• Draft control
• Drum level control
• And a whole lot more…
BurnerMate Universal Boiler Controller
System Components
Controller Chassis:
• Includes separate processors for
FSG and combustion control in
accordance with NFPA 85
paragraph 1.9.3.2.3.
• Designed for sub-panel mounting.
• Wiring is by quick disconnect
terminal blocks.
BurnerMate Universal Boiler Controller
System Components
High Precision Servos:
• Available in 3, 15, 37, 70, 140,
280, 420, and 720 ft-lb torques.
• Triac input with feedback pot
allows 0.1° accuracy.
• All servos are daisy-chained on
one digital loop.
• Mounting kits are available for
most existing valves & dampers.
BurnerMate Universal Boiler Controller
System Components
LCD Interface (required):
• Can be flush-mounted on BMS
enclosure or mounted to BMU
chassis.
• 4 x 20 character display is the
primary interface to the controller.
• Displays boiler status, alarms,
annunciations, event history, etc.
BurnerMate Universal Boiler Controller
System Components
Optional 10” touch-screens available.
• Graphical interface provides additional
information, easier operator interface.
• Modbus, Ethernet, and web-based
communications are included for
interfacing with EMS, BAS, or other
LAN networks.
• Designed to be flush-mounted in the
BMS enclosure or remote-mounted.
BurnerMate Universal Boiler Controller
Touch screen graphics
Boiler overview
screens provide
current boiler
operating conditions
in an easy-tounderstand graphical
format.
BurnerMate Universal Boiler Controller
Touch screen graphics
Color touch screens
include “walk-thru’s”
for easy controller
configuration.
BurnerMate Universal Boiler Controller
Touch screen graphics
Loop tuning screens
provide familiar loop
controller “faceplates”
for easy configuration.
Over 75 screens are
pre-configured.
BurnerMate Universal Boiler Controller
System Components
Optional Communications Module:
• Inexpensive module allows
Modbus, Ethernet, and web-based
remote monitoring.
• BMU Modbus addresses are preprogrammed.
• Designed to be sub-panel
mounted.
BurnerMate Universal Boiler Controller
System Components
Preferred supplies a choice of three flame
scanners:
• IR, UV, and self-checking UV.
• All flame scanners use identical
military-style quick connect fittings.
• The BMU will accept any U.L. listed
flame scanner.
BurnerMate Universal Boiler Controller
Flame Safeguard Functions
• Stages the burner through purge, lightoff, main flame, and shutdown.
• Supports up to three fuels (oil, natural gas, and a second gas fuel)
Fuel changeover can be initiated locally or remotely.
• Monitors up to 6 recycling limits, up to 33 shutdown limits and one
or two flame scanners.
• All limit inputs are 120 VAC, wired in parallel, and separately
annunciated.
• During a shutdown, all major status bits are recorded and saved for
up to the last ten lockouts.
• Adjustable time delays are available for many limits to avoid
nuisance trips.
BurnerMate Universal Boiler Controller
Flame Safeguard Functions
• Optional gas valve leak test logic.
• Optional oil gun purge logic (blow-thru into the furnace, or suctioned
back out of the gun via scavenger pump)
• High flue gas temperature shutdown (added dry boiler protection)
BurnerMate Universal Boiler Controller
Fuel-Air Ratio Control Functions
• Jackshaft or parallel positioning combustion control is supported.
• Up to 8 analog outputs available for fuel/air servos, and VSD’s for
FD fan, FGR fan, and ID fan.
• Up to 15 combustion control points can be programmed.
• “Off-curve” points available for standby, purge, and light-off
positions.
• Optional O2 trim control is supported.
• Separate curves available for VSD by-pass mode (in case of VSD
failure)
BurnerMate Universal Boiler Controller
Fuel-Air Ratio Control Functions
• Low fire and high fire rate limits can be temporarily configured to
limit burner travel.
• Problematic firing rates can be configured to be “skipped over” until
the problem is resolved.
• Burner can be warm-up slowly until FGR temperature reaches
setpoint.
BurnerMate Universal Boiler Controller
Boiler Control Functions
• Single, two, or three-element PID feedwater control
• Adjustable draft control is fully integrated into flame safeguard and
fuel-air control algorithms.
• Firing rate is used as a feed forward for both drum level and draft
control.
• VSD outputs available for ID fan and feedwater pump.
BurnerMate Universal Boiler Controller
Boiler Control Functions
• Remote setpoint and remote firing rate control.
• Outdoor air temperature reset
• Warm standby and domestic hot water override
• Low fire hold based on boiler shell or flue gas temperature.
• Steam pressure or hot water control supported.
• Five auxiliary relays can be configured to control additional boiler
auxiliaries.
• Supervised or automatic water column blowdown & low water level
test logic.
• Boiler cold start function allows for adjustable boiler thermal shock
protection.
BurnerMate Universal Boiler Controller
Ease of Operation
• No special sensors are required (common switches and transmitters
can be used)
• Preferred supplies flame scanners, or any U.L. listed scanners can be
used. (BMU provides 120 VAC and 24 VDC power, and accepts a
contact closure for proof of flame and analog input for optional flame
intensity.
• Servo set-up is easy, intuitive, and well-documented.
• 33 basic parameters configure most control functions.
• Flame safeguard logic is designed to U.S. standards (NFPA 85)
BurnerMate Universal Boiler Controller
Security Features
• Servos are “locked” into place on the fuel air curves. Putting a servo
in manual will trip the burner.
• Safety related parameters can only be changed when the burner is offline.
• Fuel-air curve points must be “verified” before the technician can exit
commission mode.
• Four levels of password security enable operators, technicians,
engineers, and Preferred factory personnel access to parameter
settings.
BurnerMate Universal Boiler Controller
Product Support
• BMU is Made in America. It is available only through Preferred and it’s
factory trained representatives.
• All components are in stock.
• It is supported from the Preferred Utilities factory in Connecticut,
outside sales offices in Massachusetts, Illinois, Texas, and Oregon, and
factory trained representatives around the country.
• Preferred has service engineers located throughout the U.S.