RBI FlexCore CK 850 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 850 Specifications

General

Brand	RBI
Model	FlexCore CK 850
Category	Boiler
Language	English

Summary

Introduction

The FlexCore CK-Series V3 HeatNet Control

Overview of the FlexCore CK-Series boiler control system and its capabilities.

Features & Specifications

Hardware Version 3.x Control Features

Details on the features of the HeatNet Control Version 3.x, identified by circuit board color.

Standard Features Overview

A summary of the standard features and capabilities of the HeatNet Control system.

Specifications

Components & Accessories

Part Number

List of part numbers for control boards, displays, sensors, cables, and other accessories.

SETUP & OPERATION

Basic Multi Boiler System Operation

Configuration and operation of multi-boiler systems using the HeatNet control.

CONTROL METHODS

Heating Control Methods

Overview of the five methods for controlling the FlexCore CK-Series boiler's heating functions.

Domestic Hot Water Methods

Details on the six supported methods for controlling Domestic Hot Water (DHW) functions.

WIRING CONNECTIONS

Dip Switches and Wiring

Explains dip switch settings and wire strip lengths for terminal blocks.

Heating Method 1 H-Net, Master/member

Wiring diagram for H-Net Master/member boiler communication in Heating Method 1.

SCREEN DESCRIPTIONS

Home Screen Navigation

Illustrates the navigation flow through the Home screen and other operational screens.

Home Screen

Details the main temperatures and ancillary functions displayed on the Home screen.

CALIBRATION

Calibration with Multiple Heat Exchangers

Procedures for calibrating controls for boilers with multiple heat exchangers.

CONTROL SETTINGS MENU

CONTROL SETTINGS MENU— PAGE 1

Main settings menu for system configuration, including boilers, setpoints, and pumps.

MODBUS COMMUNICATIONS

MODBUS Input/Output Variables (Read/Write)

List and description of Modbus variables for controlling and monitoring the boiler system.

Worksheet

Type II Thermistor Resistance/Temperature Table