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 6 Ashl
and City, Tennessee © 2009
Servicing should only be performed by a Qualified Service Agent 316586-000
INSTALLATION QUICK TIPS - BTH 199 AND 250 GAS PRESSURE
ADJUSTMENT PROCEDURE:
GAS PRESSURE
BTH 199 AND 250 MODELS
THE BTH 199 AND 250 MODELS
INCORPORATE A NEW GAS CONTROL,
WHICH OPERATES AT A MANIFOLD
PRESSURE OF 0"w.c. (0 kPa) FOR BOTH
NATURAL AND PROPANE GAS. SEE THE
GAS PRESSURE CHART ON PAGE 4.
THESE MODELS ARE CONFIGURED
PRIOR TO BEING SHIPPED FROM THE
FACTORY AND NO ADJUSTMENTS ARE
NECESSARY PRIOR TO STARTUP. THE
CONTROLLER MONITORS THE AIR FLOW
AND MAKES ADJUSTMENTS TO THE FAN
SPEED WHICH IN EFFECT CONTROLS
THE AMOUNT OF GAS FLOW.
THEREFORE, THE UNIT WILL SELF
ADJUST TO ACQUIRE THE CORRECT
AMOUNT OF INPUT.
"Supply gas pressure to the water heater
must not exceed a maximum of 10.5" w.c.
(295kPa) for natural gas, or 14" w.c. (3.45
kPa) for propane. The minimum supply gas
pressure is 4.8" w.c. (1.20 kPa) for natural
gas and 8.5" w.c. (2.12 kPa) for propane
gas."
Once the unit is installed and filled with water
and the inlet pressures confirmed, simply
turn the switch on and observe operation.
Cycle the unit off and on several times to
ensure proper operation.
HIGH ALTITUDE INSTALLATION
The BTH 199 and 250 models are suitable
for installation up to 10,100 feet above sea
level with no adjustments.
GAS ORIFICE
The BTH 199 and 250 models do not have a
natural gas orifice. A .230” orifice is used on
LP gas models.
IMPORTANT NOTE
A supply gas pressure regulator
(service regulator) must be installed on
the gas supply line within 10' (305 cm)
of the unit.
Gas Control Without Orifice
Natural Gas
Venturi
Gasket
w/o orifice
Gas Control with .230” LP Orifice
Venturi
Gasket w/
LP Gas
Orifice
(.230”)
Brass

A.O. Smith Cyclone Xi Specifications

General

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