A.O. Smith Cyclone Xi User Manual

CYCLONE Xi COMMERCIAL GAS WATER HEATER
BTH 120 thru 500 SERVICE HANDBOOK
A.O. Smith – Technical Training Department 33 Ashl
and City, Tennessee © 2009
Servicing should only be performed by a Qualified Service Agent 316586-000
CONTROLS – PRESSURE SWITCHES – BTH 120 through 250
Note: Check the website www.hotwater.com
for Technical Bulletin A023-06 “Air Pressure
Switches” under “Literature/Technical Bulletins”
Top View of Pressure Switches
BLOCKED INLET
PRESSURE SWITCH
MODEL PRESSURE
All -0.85”WC
Norm ally Closed /
Open on a fall in
Pres sure
Tole rance +/-.05”WC
LOW GAS PRESSURE
SWITCH
MODEL PRESSURE
Natural 4.0”WC
LP 8.0”WC
Nor m ally Open / Close
on a Rise in Pre ssure
Tole rance +/-.05”WC
BLOCKED OUTLET
PRESSURE SWITCH
MODEL SWITCH
120N +1.2”WC
150N +0.98”WC
199N +1.06”WC
250N +4.0”WC
120LP +1.3”WC
150LP +1.3”WC
199LP +4.0”WC
250LP +2.0”WC
Norm ally Closed /
Open on a Rise in
Pres sure
Tole rance +/-.05”WC
BLOWER PROVER
PRESSURE SWITCH
MODEL PRESSURE
All +0.75”WC
Norm ally Open / Close
on a Rise in Pre ssure
Tole rance +/-.05”WC

A.O. Smith Cyclone Xi Specifications

General

Brand	A.O. Smith
Model	Cyclone Xi
Category	Water Heater
Language	English