RBI FlexCore CK 2000 User Manual

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is manual is intended only for use by a qualied heating installer/technician. Read and follow this manual, all supplements
and related instructional information provided with the boiler. Install, start and service the boiler only in the sequence and
methods given in these instructions. Failure to do so can result in severe personal injury, death or substantial property damage.
Do not use the boiler during construction. Construction dust and particulate, particularly drywall dust, will cause contamination
of the burner, resulting in possible severe personal injury, death or substantial property damage. e boiler can only be operated with
a dust-free air supply. Follow the instruction manual procedures to duct air to the boiler air intake. If the boiler has been contaminated
by operation with contaminated air, follow the instruction manual guidelines to clean, repair or replace the boiler if necessary.
A x these instructions near to the boiler. Instruct the building owner to retain the instructions for future use by a qualied
service technician, and to follow all guidelines in the User’s Information Manual.
Copyright 201 Mestek, Inc.

RBI FlexCore CK 2000 Specifications

General

Brand	RBI
Model	FlexCore CK 2000
Category	Boiler
Language	English

Summary

Introduction

The FlexCore CK-Series V3 HeatNet Control

Describes the integrated boiler management system for FlexCore CK-Series boilers, focusing on optimized heating.

Features & Specifications

Specifications

SETUP & OPERATION

Basic Multi Boiler System Operation

Explains how HeatNet connects and operates multiple boilers as a single system for even BTU distribution.

Heating Control Methods

Heating Method 1

Domestic Hot Water Methods

DHW Method 1: DHW Heating ONLY

Details DHW heating using a DHW MASTER and member boilers via H-Net for tank temperature maintenance.

DHW Method 2: Failsafe Combination DHW and Space Heating

Explains combination space heating and DHW using Master/Member boilers with valves or pumps.

DHW Method 3: DHW Heating Only, Using a Header Sensor Input

Describes DHW heating maintaining setpoint at Master's System Header Sensor in the DHW tank.

DHW Method 4a: Space Heating with DHW Override of Setpoint

Covers space heating with DHW override using an Aquastat to maintain tank temperature.

DHW Method 4b: Space Heating with DHW Override of Setpoint

Details space heating with DHW override using a 10K Tank Sensor to maintain tank temperature.

DHW Method 5a: Local DHW Tank Heating using a 10k Tank Sensor

Explains local DHW tank heating override using a 10K Type II Tank Sensor for member boilers.

DHW Method 5b: Local DHW Tank Heating using a Thermostat & Hybrid Sensor

Covers local DHW tank heating using a thermostat and Hybrid Sensor connected to member boilers.

DHW Method 6: DHW using Direct Control

OPTIONAL FEATURES

Base Loading, Relay Control

Using the 4-20 mA input (OPTIONAL)

Diagnostics

Explains how the H-Net control displays and identifies faults, alarms, and sensor failures.

Communications

Failsafe Modes

Explains modes to protect systems from loss of heat conditions, including BMS failure and H-NET communication loss.

FlexCore Multi Heat Exchangers

WIRING CONNECTIONS

Relays, Interlocks and Boiler Status

SCREEN DESCRIPTIONS

Home Screen

Explains the main temperatures, graphs, and ancillary functions displayed on the Home screen.

Home Screen Messages

Master Boiler Status Screen

Shows start and stop timers for bringing boilers online and shedding them based on heating bands.

CALIBRATION

Calibration Settings

Details how to adjust Minimum, Ignition, and Maximum settings for boiler calibration.

Calibration with Multiple Heat Exchangers

LOG ENTRY

CONTROL SETTINGS MENU

CONTROL SETTINGS MENU— PAGE 1

Details settings for HeatNet Boilers, Setpoints, System Pumps, and other configurations.

CONTROL SETTINGS MENU— PAGE 2

Covers Distributed Control, Firing Mode, Modular Boiler, Adaptive Modulation, and Communications settings.

CONTROL SETTINGS MENU — PAGE 3

Outlines options for Load Factory Calibration, Factory Reset, and Display/Control Firmware loading.

CONTROL SETTINGS MENU — PAGE 4

MODBUS COMMUNICATIONS

MODBUS Input/Output Variables (Read/Write)

MODBUS Input Variables (Read Only)

MODBUS Boiler Status Flags