Weil-McLain Boiler User Manual

• Selection data
• Installation
• Piping
• Water treatment
This manual must only be used by a qualified heating installer/service technician.
Before installing, read all instructions, including this manual, the Ultra Boiler
Manual and all applicable Supplements. Consider all connections to the boilers
before selecting a location and layout. Failure to comply could result in severe
personal injury, death or substantial property damage.
Part No. 550-101-232/0703
Gas-fired
water boiler
Installation Manual
with
Multiple-boiler systems with
Weil-McLain Easy-Fit
®
piping

Weil-McLain Boiler Specifications

General

Brand	Weil-McLain
Model	Boiler
Category	Boiler
Language	English

Summary

Hazard definitions

Selection data

Controls

Overview of boiler sequencing control options available for Ultra boilers.

Domestic hot water

References for domestic hot water system piping diagrams.

Venting and combustion air

Critical requirements for proper venting and combustion air supply.

Additional considerations

Important notes and points to review before installation.

Ratings and engineering data

Water header piping

Dimensions

Placement and mounting information

Easy-Fit® Piping

Easy-Fit® Piping installation

Step-by-step guide for installing Weil-McLain Easy-Fit® piping systems.

Piping schematic

Diagram of typical piping for multiple Ultra boilers using Easy-Fit® Manifolds.

Combustion air & vent piping installation

Vent piping

Installation and termination requirements for individual boiler vent pipes.

Combustion air piping

Requirements for supplying combustion air to boilers.

Combustion air manifolds

Guidelines for sizing and installing common combustion air manifolds.

Gas piping

Connecting gas supply piping

Instructions for connecting gas supply to the boiler.

Common gas piping installation

Guidelines for constructing and sizing gas headers for multiple boilers.

Additional instructions

Air for boiler room ventilation

Ensuring sufficient air infiltration for the boiler room.

Wiring

References for boiler sequencing control and general wiring requirements.

Water treatment

Importance of water treatment for multiple boiler systems and initial fill.