Model 2855e Multi-Boiler Controller
THIS CONTROLLER IS NO LONGER AVAILABLE
THIS PAGE IS FOR INFORMATIONAL PURPOSES ONLY
The Model that directly replaces it is the NexSys Boiler unit.
The Lakewood Model 2855e Multi-Boiler Controller uses LonWorksP®P 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 2855e 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.
- Cycle/Sample or Continuous sample control of blowdown, configurable in the field.
- Two water meter inputs, conductivity input with 20 ft cable, flow switch input, four relay outputs, and Power On/Off switch in a NEMA 4X enclosure are all standard features.
- Removable power cord and receptacles for simple conduit installations.
- Includes four relays for blowdown, chemical feed, and alarms; expandable up to 12 relay outputs.
- Includes three security levels to prevent unauthorized programming access.
- Includes two languages; English/Spanish are standard.
- Heavy-duty stainless steel domed numeric keypad and large illuminated graphical display allow for quick and easy programming. Steel domed switches improve the tactile sensing and life expectancy of the keypad.
- 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.
|Controller Inputs||NCON, Conductivity Node|
|Power||120 VAC 50/60 Hz||ConductivityRange||500-10,000µS|
|Network Inputs||One to Eight Boilers, One||Conductivity Accuracy||1% of Full Scale|
|NRLY and up to 8 NCONs||Conductivity Resolution||1% of Reading|
|WaterMeter Inputs||Two, Contact Head,||Ambient Temperature||32-158°F (0-70°C)|
|Paddle Wheel, or Turbine||Temperature Comp.||Selectable of Disabled|
|2855 Relays||Eight, 3 Amps @ 120 VAC||NRLY, Relay Node|
|4 for alarms and chemicals||Ambient Temperature||32-158°F (0-70°C)|
|4 for Boiler Control||Enclosure||NEMA 4X|
|NRLY Relays||Four, 3 Amps @ 120 VAC||Power||24 VDC|
|Pressure||600 psi (41.4 bar)||Deadband||Adjustable|
|Max Temperature||486°F (252°C)||Conductivity Setpoint||Cycle/Sample or Continuous|
|Body||316 Stainless||Sample/Cycle Times||Adjustable|
|Electrode||416 Stainless||Keypad||16 Tactile Push-Button|
|Connection||¾ Inch MNPT||Display||Illuminated 128×64 pixel LCD|
|Ambient Temperature||32-158°F (0-70°C)|
|Enclosure||Nema 4X, ETL|
LonWorks is a registered trademark of Echelon Corporation
Maximum Setup for an 8 Boiler Sample/cycle Control Shown
2855e LonWorks Technology based multi-boiler cycle sample or continuous blowdown conductivity controller. Standard range is 500-10,000 µS and can control up to 8 boilers. The controller has a total of 8 relays, the first 4 of which are configurable for HIGH/LOW alarms or feed chemical based on 2 makeup sources, the second 4 relays are used for boiler blowdown control. For 5-8 boilers, a NRLY will need to be purchased. Requires one SR2N or SR4N and a PL5, PL6 or GV per boiler (NIN included).
CONTROLLER OPTIONS (optional, select one or more)
-RS2L Communications node with LRWS program.NRLY Four additional relays with enclosure, also available with receptacles and power cord.
SENSOR WITH NODE OPTIONS (required, select one below)
SR2N Boiler water sensor with NCON and enclosure, ¾ inch NPT; rated to 600 psi @ 486°F (41.4 bar @ 252°C). This sensor cannot be used after a sample cooler.SR4N 4-electrode sensor with NCON and enclosure, ¾ inch NPT; rated to 250 psi @ 392°F (17.2 bar @ 374°C).
PLUMBING (recommended, need one of the below per boiler)
PL5 Plumbing for cycle/sample assembly ½ inch (1/8 & 1/16 orifice plates and union).PL6 Plumbing for continuous sample assembly, ½ inch (1/8 & 1/16 orifice plates & union).PL575 Plumbing for cycle/sample assembly ¾ inch (1/8 & 1/16 orifice plates and union).PL675 Plumbing for continuous sample assembly ¾ inch (1/8 & 1/16 orifice plates & union).PLKT Plumbing kit. Continuous and sample cycle. Orifice plates and unions, cross, tee, manual block valve. No piping.GV ½ inch forged globe valve for flow metering instead of an orifice plate and union.NOTE: Two GV options are required for continuous sample and one for cycle sample if the orifice plate and union are not used. BLOWDOWN VALVE OPTIONS (optional, select one only) MBV1 Motorized ½ inch blowdown valve rated to 400 psi @ 480°F (27.6 bar @ 249°C).MBV2 Motorized ¾ inch blowdown valve rated to 400 psi @ 480°F (27.6 bar @ 249°C). SOFTWARE AND REMOTE COMMUNICATIONS
LRWS Windows-based software program for computer to communicate with 2000 Series.
WEBNode IP/TCP device for use with 2000 Series controllers.
EZWeb Wireless internet interface for use with WEBNode and 2000 Series controllers.
1169993 SR2N, 2 electrode sensor with 20 ft cable and cond node
1235438 SR2NHD, 2-elec harsh duty sensor, 20 ft cable, cond node
1169994 SR4N, 4 electrode sensor with 20 ft cable and cond node
1268833 NRLY relay node
1167295 PL5, ½ sample/cycle plumbing
1168601 PL575, ¾ sample/cycle plumbing
1167297 PL6, ½ continuous plumbing
1167296 PL675, ¾ continuous plumbing
1233981 PLKT Plumbing kit. sample/cycle and continuous sample kit
Includes unions, orifice plates, cross, tee, and manual block
valve only. Does not include piping.
1167520 GV, Globe valve with Position Indicator
1269395 GV, Globe valve without Position Indicator
1268608 MBV1, ½ inch motorized ball valve
1268614 MBV2, ¾ inch motorized ball valve
PART NO. REPLACEMENT PARTS
1167162 2 electrode boiler sensor
1229841 2 electrode harsh duty boiler sensor
1168074 4 electrode sensor (543M-STD
1168513 NCON conductivity node