A.O. Smith 101 Series User's Information Manual

22
Setpoint Ranges & Safeties
Safety
Factory
Setting
Action
Low Flow
(heating /cooling
side)
< 4.4 Gal/Min Shuto
Evaporator
Temperature
Defrost Cut-In
34° F Shuto
Evaporator
Temperature
Defrost Cut-Out
38° F Alarm
Temperature
Setpoint Range
100° F - 160° F-
High Refrigerant
Pressure
Cut-Out
410 PSI Shuto / Alarm
High Refrigerant
Pressure Cut-in
300 PSI -
Low Refrigerant
Pressure
Cut-Out
12 PSI Shuto / Alarm
Low Refrigerant
Pressure Cut-In
15 PSI -
Compressor
Anti-Short
Cycle Delay
300 Sec -
So: Sensor O set allows for compensation of any di erence
between the displayed temperature and the temperature being
read by the sensor.
ESTICTED MODE
Switching the Controller to Restricted Mode will prevent users
from adjusting most or all of the parameter settings. The main
screen will function normally.
Note: The OFF parameter is the only parameter that can be
accessed in Restricted Mode. So be sure that your desired
parameter values are set before changing over to restricted
mode.
In addition, the di erential between the OFF/ON parameters
is  xed in restricted mode. If the OFF parameter is adjusted
the On parameter will adjust to maintain the di erential.
Setting the controller to restricted mode:
• Turn power o from the controller
• Carefully remove the front panel
• Locate the jumper and carefully position it on one pin as
shown in the diagram below.
The controller is now in restricted mode. Securely replace the
cover before reconnecting power to the controller.
Lock out
You can format your parameters to completely restrict all user
adjustment of the control when in restricted mode. To do this
set the HtS value equal to the OFF value and the LtS equal to
the On value. This makes the OFF/On range equal to the HtS/
LtS range and thereby unadjustable in restricted mode.
PLC CONTOLLE
Your units may be equipped with a Programmable Logic Controller
(PLC) and Human-Machine Interface (HMI) for controlling the
water heating process. Sensors within the system provide
operating information to the PLC which uses this information
to safely control the heating process. The control comes with
a pre-set water high temperature setpoint of 120°F. The control is
limited to a maximum water high temperature setpoint of 160°F.
Operating at higher temperatures could void the warranty.
TEMPEATUE & SETPOINTS
To view and adjust the temperature setpoint, follow these
steps.
• View the HMI mounted on the electrical panel door.
Locate the “High Temp” value on the setup screen.
• Touch the box representing the current value. A keypad
and cursor will appear.
• Enter the desired temperature setpoint (maximum 160°F)
• Touch the return, or enter key on the keypad. The
display will return to the info screen, and your entered
value should be displayed in the “high Temp” value box.
The unit is now set to heat up to the new setpoint
temperature.
Note: Until the Return key is pressed, the unit will run
based upon the previous setpoint temperature.
PROGRAMMABLE LOGIC CONTROLS

A.O. Smith 101 Series Specifications

General

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