A.O. Smith 101 Series User Manual

23
TEMPERATURES MENUS
OPERATING SETPOINT
User adjustable setting 90°F (32.2°C) to 190°F (87.8°C) range;
factory default is 120°F (48.9°C). (The factory setting for SASO
compliant units is 140°F/60°C). When the water temperature
sensed by the control system from the immersion Temperature
Probe reaches the Operating Set Point the control system will end
the heating cycle. A call for heat will be activated again when the
water temperature drops below the Operating Set Point minus the
1st Di󰀨erential Setting.
Example: Operating Set Point is 120°F (48.9°C), the 1st Di󰀨erential
Setting is 2°F (1.1°C) (factory default). A call for heat will be activated
when the sensed water temperature drops to 118°F (47.8°C).
DIFFERENTIAL SETTINGS
Adjustable user setting(s) 1°F (0.6°C) to 20°F (11.0°C) range; factory
default is 2°F (1.1°C). The water heaters covered in this Instruction
Manual will have 3, 6 or 9 heating elements. Each group of 3 heating
elements is one “Bank” of heating elements. Heating elements are
energized in Banks of 3. Each Bank of heating elements will have a
Di󰀨erential Setting associated with it. Di󰀨erential Settings are located
in the Temperatures Menu.
There is a 1st Di󰀨erential Setting on all models. There will be one
additional Di󰀨erential Setting visible/adjustable for each additional
Bank of (3) heating elements.
OPERATING SEQUENCE
With an Operating Set Point of 120°F (48.9°C) and all Di󰀨erential
settings at 2°F (1.1°C) the On/O󰀨 sequencing of heating element
Banks would be as follows:
Table 9. On/O󰀨 Element Sequencing in
Three-Element Water Heater
ELEMENT
NUMBER
DIFFERENTIAL
SETTING
TURN ON TEMP TURN OFF TEMP
Element 1
2°F (1°C)
118°F (48°C)
120°F (49°C)
Element 2
2°F (1°C)
116°F (47°C) 118°F (48°C)
Element 3
2°F (1°C)
114°F (46°C) 116°F (47°C)
TANK TEMPERATURE
Non adjustable information display. Current water temperature as
sensed by the control system from the immersion Temperature
Probe.
TANK PROBE OFFSET
User adjustable setting -5°F (-2.8°C) to +5°F (2.8°C) range; factory
default is 0°F (0.0°C). If the current Tank Temperature is sensed
(from the immersion Temperature Probe) at 120°F (48.9°C) and the
o󰀨set is adjusted to -5°F (-2.8°C) the control system would calibrate
or “o󰀨set” the Tank Temperature to 115°F (46.1°C) . Heating cycles
would then start/stop based on the calibrated Tank Temperature.
Used to calibrate for slight di󰀨erences in control system temperature
sensing. This can improve the precision of temperature control in
the storage tank and at points of use. This feature can also be used
to compensate for building recirculation loops (hot water returning
to the storage tank) that may cause the heating cycle to terminate
prematurely.
Printed on 5/6/2022 7:17 AM CT

A.O. Smith 101 Series Specifications

General

Brand	A.O. Smith
Model	101 Series
Category	Water Heater
Language	English