High Altitude Installations - AO Smith BTR120 Manuel D'instructions

must be periodically oiled. Refer to the pump manufacturer's
instructions for lubrication requirements.
CIRCULATING PUMP WIRING DIAGRAM
STORAGE TANK OR BUILDING RECIRCULATION
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT
SHARE POWER WITH WATER HEATER AS THIS
MAY CAUSE ELECTRICAL LINE NOISE AND
LEAD TO ERRATIC CONTROL SYSTEM
OPERATION.
L1 HOT
120 VAC
POWER
L2 NEUTRAL
FIGURE 8.
CIRCULATING PUMP WIRING DIAGRAM
DISHWASHER LOOP WITH TOGGLE SWITCH
DISHWASHER
TOGGLE
SWITCH
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT SHARE
POWER WITH WATER HEATER AS THIS MAY
CAUSE ELECTRICAL LINE NOISE AND LEAD
TO ERRATIC CONTROL SYSTEM OPERATION.
L1 HOT
120 VAC
POWER
L2 NEUTRAL
FIGURE 9.

HIGH ALTITUDE INSTALLATIONS

Fire and Explosion Hazard
Under no circumstances should the
input exceed the rate shown on the
water heater's rating label.
Overfiring could result in fire or
explosion.
Gas and carbon monoxide detectors are
available.
FIELD SUPPLIED TEMPERATURE CONTROL
INSTALLED IN THE STORAGE TANK
OR CIRCULATING LOOP RETURN LINE
CIRC
PUMP
MOTOR
FIELD SUPPLIED TEMPERATURE
CONTROL INSTALLED IN THE
CIRCULATING LOOP RETURN LINE
CIRC
PUMP
MOTOR
CIRCULATING PUMP WIRING DIAGRAM
Breathing Hazard - Carbon Monoxide Gas
DISHWASHER LOOP WITH TOGGLE SWITCH
DISHWASHER
TOGGLE
SWITCH
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT SHARE
POWER WITH WATER HEATER AS THIS MAY
CAUSE ELECTRICAL LINE NOISE AND LEAD
TO ERRATIC CONTROL SYSTEM OPERATION.
L1 HOT
120 VAC
Breathing carbon monoxide can cause brain damage or
POWER
death. Always read and understand instruction manual.
L2 NEUTRAL
Installations above
replacement of burner orifices in accordance with current
edition of the National Fuel Gas Code (ANSI Z223.1). For
Canadian installations consult Canadian Installations Code
CAN/CSA B149.1. Failure to replace orifices will result in
improper and inefficient operation of the water heater resulting
in the production of increased levels of carbon monoxide gas
in excess of safe limits which could result in serious personal
injury or death.
You should contact your gas supplier for any specific changes
which may be required in your area.
As the elevation above sea level is increased, there is less
oxygen per cubic foot of air. Therefore, the heater input rate
should be reduced at high altitudes for satisfactory operation
with the reduced oxygen supply. Failure to make this reduction
would result in an over firing of the heater causing sooting,
poor combustion and/or unsatisfactory heater performance.
Ratings specified by manufacturers for most appliances apply
for elevations up to 2000 feet (610m). For elevations above
2000 feet (610), ratings must be reduced at the rate of 4%
for each 1000 feet (305m) above sea level. For example, if a
heater is rated at 78,000 Btuh (22.9 Kwh) at sea level, to rate
the heater at 4000 feet (1219m), you subtract 4 (once for each
thousand feet) x.04 (4% input reduction) x 78,000 (original
rating) from the original rating.
Therefore, to calculate the input rating at 4,000 feet (1219m):
4 x .04 x 78,000 = 12,480 Btuh (3.7 Kwh), 78,000 (22.9 Kwh) -
12,480 (3.7 Kwh) = 65,520 Btuh (19.2 Kwh). At 6000 feet (1829m)
the correct input rating should be 59,280 Btuh (17.4 Kwh).
12
FIELD SUPPLIED TEMPERATURE
Under no circumstances should
CONTROL INSTALLED IN THE
the input exceed the rate shown
CIRCULATING LOOP RETURN LINE
on the water heater's rating label.
Overfiring could result in damage to
the water heater and sooting.
Gas and carbon monoxide detectors
are available.
CIRC
PUMP
MOTOR
2000 feet (610 meters) require