Model 2250 - Microprocessor-Based Boiler
Controller
LONWORKS* is the latest in microprocessor technology that gives the user the
highest level of application flexibility. A large graphic screen, multiple
inputs and very easy setup, with easy field upgrade characterize this new
technology.
Features
- Steam flashing detector and compensation.
- Cycle sample or continuous conductivity control of blowdown.
- Use cycle sample for blowdown less than 1,000 lb./hr.
- Use continuous for blowdown greater than 1,000 lb./hr.
- Can feed chemical according to water meter percent of bleed or percent
on-time.
- Interactive communications software datalog and control (-RS2L & -RTC
Options).
- Four different languages:
- English Spanish (standard)
- English French (optional)
- English German (optional).
Benefits
- Accurate control of boiler conductivity.
- Control results in fuel savings by preventing excessive blowdown.
- Prevents carryover due to excessive conductivity.
- Two water/flow meter inputs provided.
Specifications
Inputs |
|
|
Connection |
¾ inch MNPT |
Power |
120/240 VAC 50/60 HZ |
Controller |
|
Sensor Input |
2 and 4 electrode Conductivity |
Conductivity Range |
0-8,000 (other ranges available) |
Temperature comp. |
Automatic or disable |
Conductivity Accuracy |
± 40 µS |
Flow switch |
Dry contact |
Conductivity Resolution |
10 µS |
Water Meter Input |
Two contacting head or open collector |
Deadband |
Adjustable |
|
Conductivity Setpoint |
Cycle sample or continuous |
Outputs |
|
Sample Time |
Adjustable |
Relays |
Four, 3 Amps @ 120 VAC |
Cycle Time |
Adjustable |
4-20 mA |
Two, isolated w/-35L |
Keypad |
Numeric |
|
Display |
Illuminated 128x64 pixel LCD |
Sensor (SR2) |
|
Ambient Temperature |
32-158°F (0-70°C) |
Pressure |
600 psi (41.4 bar) |
Enclosure Rating |
ABS Plastic
UL and CSA Listed |
Max. Temperature |
486°F (252×C) |
|
|
Body |
Carbon Steel |
|
|
Electrode |
416 SS |
|
|
Insulator |
PEEK |
|
|
|
Model 2255 - Microprocessor-Based Multi Boiler Controller
The Lakewood Model 2255 Multi-Boiler Controller uses
LONWORKS* Technology for accurate control of your boiler system. The system will
allow control of one to eight boilers using the cycle sample or continuous
sample method. Two water meter inputs are available which can be used to feed
chemicals. Each conductivity input contains its own microcontroller which talks
directly to the relay that controls the motorized ball valve for each boiler.
The 2255 can be programmed with LRWS (Lakewood Remote Windows Software) or from
the keypad of the controller. LRWS allows data to be accumulated on all boilers,
water meter inputs, chemical pump on time and more. LRWS will also allow the
user to make graphs of the downloaded information, print conductivity values or
export information for use with datalogging spreadsheets.
Features
- Steam flashing detector and compensation.
- Steam flashing detector and compensation.
- Control and monitor 1 to 8 boilers.
- Future boilers can be added to an existing system.
- Boiler input(s) can be substituted to monitor
condensate.
- Cycle sample or continuous conductivity control of
blowdown.
- Use Cycle sample for blowdown less than 1,000 lb/hr.
- Use continuous for blowdown greater than 1,000 lb/hr.
- Two water/flow meter inputs provided.
- Can feed chemical according to water meter, percent of
bleed, or percent on-time.
- Interactive communications software datalog and control
(-RS2L & -RTC Options).
- Four different languages:
- English Spanish (standard)
- English French (optional)
- English German (optional)
Benefits
- Accurate control of boiler conductivity.
- Control results in fuel savings by preventing excessive
blowdown.
- Prevents carryover due to excessive conductivity.
- One controller can monitor and datalog up to 8 boilers.
Specifications
Controller Inputs |
|
|
NCON, Conductivity Node |
|
Power |
120/240 VAC 50/60 HZ |
Conductivity Range |
0-10,000 mS |
Network Inputs |
One to Eight boilers, Two
NRLY's and up to 8 NCON's |
Conductivity Accuracy |
1% of full scale |
Water Meter Input |
Two contacting head or hall
effect. |
Conductivity Resolution |
!% of reading |
|
Ambient Temperature |
32-158°F (0-70°C) |
Outputs |
|
Temperature comp. |
Automatic or disable |
2255 Relays |
Four for alarms or chemfeed
3 Amps @ 120 VAC |
Power |
24 VDC |
NRLY |
Four in each NRLY, 3 Amps @
120 VAC |
|
|
NRLY, Relay Node |
|
Sensor (SR2) |
|
Ambient Temperature |
32-158°F (0-70°C) |
Pressure |
600 psi (41.4 bar) |
Enclosure |
ABS Plastic |
Max. temperature |
486°F (252°C) |
Power |
24 VDC |
Body |
Carbon Steel |
|
Electrode |
416 SS |
Controller |
|
Insulator |
PEEK |
Deadband |
Adjustable |
Connection |
¾ inch MNPT |
Conductivity Setpoint |
Cycle sample or continuous |
|
|
Sample Time |
Adjustable |
|
|
Cycle Time |
Adjustable |
|
|
Keypad |
Numeric |
|
|
Display |
Illuminated 128x64 pixel LCD |
|
|
Ambient Temperature |
32-158°F (0-70°C) |
|
|
Enclosure |
ABS Plastic
UL and CSA Listed |
|
|