RBI FlexCore CK 3000 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 3000 Specifications

General

Brand	RBI
Model	FlexCore CK 3000
Category	Boiler
Language	English

Summary

Features & Specifications

Hardware Version 3.x Control Features

Specifications

SETUP & OPERATION

Basic Multi Boiler System Operation

Explains how to operate a basic multi-boiler system using HeatNet.

Mixed Boiler Types Using Priority Sets

Details how to mix boiler types using priority settings for optimal performance.

Mixed Boiler System Operation

Covers starting and stopping boilers in mixed systems based on priority.

Mixed System Type 1: High System Turndown

Explains mixed systems with high effective system turndown and fault tolerance.

Mixed System Type 2: Condensing/Non-Condensing

Discusses mixing condensing and non-condensing boilers to control system cost.

Heating Control Methods

Heating Method 1

Stand-alone modulating method using PID and HEAT DEMAND input.

Heating Method 2

Operating as two separate boilers or HIGH/LOW using T1 & T2 inputs.

Heating Method 3

Remote 4-20 mA or 0-10 VDC signal control for firing rate.

Heating Method 4

Boiler ON/OFF at 100% modulation using the AA terminal.

Heating Method 5

Operating Limit

Domestic Hot Water Methods

DHW Method 1: DHW Heating ONLY using a DHW MASTER and Member Boiler(s) Employing H-Net

DHW heating only using H-Net master and member boilers.

DHW Method 2: Failsafe Combination DHW and Space Heating with a MASTER Boiler and Member Boilers Utilizing Valves

Master controls space heating, members handle DHW and failsafe.

DHW Method 2: Failsafe Combination DHW and Space Heating with a MASTER Boiler and Member Boilers Utilizing Pumps

Master controls space heating, members handle DHW and failsafe with pumps.

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

DHW heating only using a header sensor input and multiple boilers.

DHW Method 4a: Space Heating with DHW Override of Setpoint on Master, using an Aquastat

Space heating with DHW override using an aquastat.

DHW Method 4b: Space Heating with DHW Override of Setpoint on Master, using a DHW 10K Tank Sensor

Space heating with DHW override using a 10K tank sensor.

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

Local DHW tank heating override using a 10K Type II tank sensor.

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

Local DHW tank heating using a thermostat and hybrid sensor.

DHW Method 6: DHW using Direct Control

DHW control using a direct 4-20 mA signal.

OPTIONAL FEATURES

DHW Maximum Runtime

Base Loading, Relay Control

Using the 4-20 mA input (OPTIONAL)

Combustion Air Damper

Outdoor Reset

Diagnostics

Blower Protection

FlexCore Multi Heat Exchangers

Wiring Connections

Dip Switches and Wiring

Heating Method 1 H-Net, Master/member

Heating Methods 2 and 4: AA-High Fire and High/Low, Master or member boiler

Heating Method 3 4–20 mA/ 0-10 VDC

Heating Method 5: MODBUS (Optional BACnet or LonWorks bridge — Protocessor)

Relays, Interlocks and Boiler Status

Temperature sensors

Common system damper wiring

Failsafe common system pump wiring

Screen Descriptions

Calibration

Calibration with Multiple Heat Exchangers

MODBUS COMMUNICATIONS

MODBUS Input/Output Variables (Read/Write)

MODBUS Input Variables (Read Only)