Xylem Bell & Gossett B Series User Manual

SAFETY
INSTRUCTIONS
This safety alert symbol will be used in this manual to draw attention to
safety related instructions. When used, the safety alert symbol means
ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A
SAFETY HAZARD.
DESCRIPTION
Precharged Expansion Tanks contain either a bladder or a diaphragm
to separate the air charge from the system water. Tanks are designed
to absorb the expansion forces of heating/cooling system water while
maintaining proper system pressurization under varying operating
conditions.
NOT FOR USE IN DOMESTIC
(POTABLE) WATER SYSTEMS
DANGER: Series “B”, “D”, & “B-LA” are for use in closed loop
systems only. Domestic, potable or fresh water can cause serious
corrosion in a tank. This can result in leakage and a potential
explosion. Do not use for domestic, potable or fresh water. Failure
to follow this instruction will result in serious personal injury or
death and property damage.
OPERATIONAL LIMITS
Maximum Operating Pressure: 125 psi (or as stamped on nameplate)
Maximum Operating Temperature: 240ºF
Minimum Operating Temperature: 35°F (non-glycol application)
18°F (glycol application)
Pressurized Expansion Tanks (ASME)
INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.
WARNING: Explosion Hazard
Failure to follow instructions in the accompanying product
manual can cause rupture or explosion, possibly causing serious or
fatal injury, leaking or flooding and/or property damage.
WARNING: Carefully read the Instruction Manual to avoid
serious personal injury and property hazards and to ensure
safe use and proper care of this product.
INSTRUCTION MANUAL
A01500J

Xylem Bell & Gossett B Series Specifications

General

Manufacturer	Xylem Bell & Gossett
Model Series	B Series
Category	Water Heater
Frequency	60 Hz
Maximum Operating Temperature	250°F (121°C)
Connection Size	1/2 - 3 in
Voltage	115V
Phase	1

Summary

Safety Instructions

Explosion Hazard Warning

Warning regarding failure to follow instructions leading to rupture or explosion.

Domestic Water System Restriction

Usage Prohibition

Series B, D, B-LA tanks are for closed loop systems only. Do not use for domestic water.

Operational Limits

Pressure and Temperature Specifications

Specifies maximum operating pressure and temperature limits for the tanks.

Description of Expansion Tanks

Tank Functionality

Explains tanks absorb expansion forces using a bladder or diaphragm.

Point of Connection

General Installation and Piping

Covers tank orientation, piping differences, and general installation considerations.

Piping Details and Sizing

Details tank-to-system piping, connection points, and recommended pipe sizing.

System Isolation and Ancillary Components

Emphasizes isolation valves and the need for air vents and pressure gauges.

Installation Procedures

Initial Tank Checks

Check tank air charge pressure against minimum system pressure at installation location.

Operating Instructions

Pre-charge Check and Adjustment

Procedure for checking and adjusting expansion tank pre-charge pressure.

Service Instructions

Leakage and Corrosion Checks

Instructions for periodic checks for leaks or corrosion and replacement if found.

Air Valve Core Replacement

Procedure for replacing the air valve core if the tank fails to hold pressure.

Bladder or Diaphragm Replacement

Details on replacing a leaking bladder or diaphragm in the expansion tank.

Figure Notes

Installation Diagram Explanations

Notes clarifying tank connection locations and tee placement in diagrams.

Piping Diagrams

Suggested and Alternate Piping

Presents suggested and alternate piping diagrams for tank system connections.

Table A - Minimum Pipe Size

Pipe Sizing Chart

Provides a table for selecting minimum pipe sizes based on MBH and temperature.