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Model 2855e Multi-Boiler Controller




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
Outputs Power 24 VDC
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
Sensor (SR2) Controller
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 Multi Boiler Controller (up to 8)

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



1167162            2 electrode boiler sensor

1229841            2 electrode harsh duty  boiler sensor

1168074            4 electrode sensor (543M-STD

1168513            NCON conductivity node