Navien LCB700-21RS User Manual

Installation Location Type Model
Internal
Regular
LCB700-21RS
LCB700-28RS
LCB700-36RS
System
LCB700-21LS
LCB700-28LS
LCB700-36LS
Combi
LCB700-21LC
LCB700-28LC
LCB700-36LC
External
Regular
LCB700-21RSX
LCB700-28RSX
LCB700-36RSX
System
LCB700-21LSX
LCB700-28LSX
LCB700-36LSX
Combi
LCB700-21LCX
LCB700-28LCX
LCB700-36LCX
Keep this manual near this boiler for future reference
whenever maintenance or service is required.
Installation &
Operation
Manual
WARNING
If the information in these instructions is not followed exactly, a fire or explosion may
result, causing property damage or personal injury.
–
Do not store or use petrol or other flammable vapours and liquids in the vicinity of this or any
other appliance.
–
Installation and service must be performed by a qualified installer or service agency.
Condensing Blue Flame Oil-Fired Boile
r

Navien LCB700-21RS Specifications

General

Category	Boiler
Brand	Navien
Model	LCB700-21RS
Type	Combi Boiler
Gas Connection Size	3/4" NPT
Vent Type	Direct Vent
Ignition	Electronic Ignition
Boiler Type	Condensing
Fuel Type	Natural Gas
Efficiency	95%
Water Connections	1
Vent Diameter	3 inches
Warranty	15-year heat exchanger, 5-year parts

Summary

Safety Information

General Safety Warnings and Precautions

Explains safety symbols, hazard definitions, operational safety, and prevention measures.

General Installation Guidelines

Installation Requirements and Compliance

Discusses compliance with British Standards, regulations, and specific requirements for installations in Ireland.

Installing the Boiler

Installation Procedure and Location Selection

Outlines installation steps and guidance on choosing an installation location.

Installation Clearances and System Piping

Condensate Drain, Filling, and System Testing

Connecting the Oil Supply

Oil Supply Systems and Connections

Setting the DIP Switches

DIP Switch Configuration for Operation and Demand

Connecting the Power Supply

Power Supply Connection Guidelines and Safety

Covers safe practices, voltage requirements, and grounding for power connection.

Installation Check list

Comprehensive Installation Verification Checklist

Provides a comprehensive checklist for installation verification across various aspects.

Error Codes

Error Code Definitions and Remedies

Lists error codes, their descriptions, and potential remedies for troubleshooting.

Maintaining the Boiler

Boiler Cleaning, Draining, and Freeze Protection

Maintenance Schedules and Part Servicing

Outlines maintenance schedules and procedures for parts like the condensate trap and oil filter.