RBI DOMINATOR Series User Manual

01/10 Copyright 2008 Mestek, Inc.
DOM-I0M-7
82-0262
Boiler manual
Installation and operation
instructions
 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.
Finned copper tube
Gas boilers (DB) &
Water heaters (DW)

RBI DOMINATOR Series Specifications

General

Category	Boiler
Brand	RBI
Series	DOMINATOR
Fuel Type	Gas
Configuration	Floor-standing
Water Content	Varies by model
Dimensions	Varies by model
Weight	Varies by model

Summary

Ratings and Capacities

Combustion Air and Ventilation Requirements

Requirements for supplying air for combustion and venting.

Air Supply for Combustion

Intake Air Option - General Guidelines

Providing combustion air via a dedicated outdoor pipe.

General Venting Guidelines

Vent System Options

Describes different methods for venting the boiler/water heater.

Vertical/Chimney Venting

Direct Vent, Positive Pressure, Category III

Horizontal Vent, Negative Pressure, Category I

Piping Requirements

Freeze Protection

Precautions for outdoor installations in freezing conditions.

Heating System Piping

Specifics on connecting heating system piping.

Domestic Water Supply Piping

Gas Supply Piping

Guidelines for connecting the gas supply line.

Electrical Wiring and Operation

Electrical Wiring

Hydronic Heating Boilers

Boiler/Water Heater Operation

Staging Operation

Pressure Switch Settings

Operation Sequence, 2 Stage D300 Through D900

Operation Sequence, 4 Stage D1050 Through D2100

Fault Conditions

Low Air (Blocked Flue/Air Inlet) Condition

Operating Instructions

For Your Safety

Critical safety precautions before operating the appliance.

Operating Instructions

Step-by-step guide for starting and operating the boiler/water heater.

To Turn Off Gas To Appliance

Procedure to safely shut off gas supply to the appliance.

Checking and Adjustments

Input Rate, Natural Gas

Pilot Adjustment

Gas Pressure Adjustment

Maintenance Procedures

Burner Inspection and Removal

Heat Exchanger Inspection

Heat Exchanger Removal, Cleaning & Replacement

Detailed steps for removing, cleaning, and replacing the heat exchanger.

Troubleshooting Guide

No Power To Unit

Possible causes and corrections for a unit with no power.

No Action On Call For Heat

Troubleshooting when the unit does not respond to a heat call.

No Power To Pump

No Power to Power Venter

Power Venter On, No Action From Unit

No Power To Blower(s)

Unit Does Not Spark

Diagnosing issues when the unit does not spark for ignition.

Unit Sparks But Will Not Fire

Troubleshooting when the unit sparks but won't ignite.

Pilot Lights But Unit Will Not Fire

What to do if the pilot lights but the unit doesn't fire.

Insufficient Heating

Causes and solutions for inadequate heating output.

Unit Consistently Shuts Down On Limit

Addressing issues where the unit shuts down due to high limits.

Bad Combustion (High CO, Yellow Flames)

Troubleshooting poor combustion and yellow flames.

Gas Flow Shuts Down During Operation

Diagnosing gas flow shutdown while blowers are active.

Start-Up Report and Procedure

Pre-Startup Check List

A checklist for pre-startup inspection of the unit.

Boiler Startup Sequence

Step-by-step procedure for starting up the boiler.