High Altitude Installations - A.O. Smith 104 Series Instruction Manual

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
Breathing Hazard - Carbon Monoxide Gas
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Installations above
repla ement of burner orifi es in a
edition of the National Fuel Gas Code (ANSI Z223 1) For
Canadian installations onsult Canadian Installations Code
CAN/CSA B149 1 Failure to repla e orifi es will result in
improper and ineffi ient operation of the water heater resulting
in the produ tion of in reased levels of arbon monoxide gas
in ex ess of safe limits whi h ould result in serious personal
injury or death
You should onta t your gas supplier for any spe ifi
whi h may be required in your area
As the elevation above sea level is in reased, there is less
oxygen per ubi foot of air Therefore, the heater input rate
should be redu ed at high altitudes for satisfa tory operation
with the redu ed oxygen supply Failure to make this redu tion
would result in an over firing of the heater ausing sooting,
poor ombustion and/or unsatisfa tory heater performan e
Ratings spe i ed by manufa turers for most applian es apply
for elevations up to 2000 feet (610m) For elevations above
2000 feet (610), ratings must be redu ed at the rate of 4
for ea h 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 subtra t 4 (on e for ea h
thousand feet) x 04 (4
rating) from the original rating
Therefore, to al ulate 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 orre t input rating should be 59,280 Btuh (17 4 Kwh)
12
Under no circumstances should
the input exceed the rate shown
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.
2000 feet (610 meters)
ordan e with
input redu tion) x 78,000 (original
require
urrent
hanges