A.O. Smith 52, Инструкция по эксплуатации

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Table 9. Water Heater States
STATE DESCRIPTION
Fault
The control system has detected/declared a Fault Condition. The control system will discontinue heating
operation and “lock out.” Power to the water heater must be cycled off and on to reset the control
system. Note; cycling power will not reset the control system until the condition that caused the fault
has been corrected
Table 10. Control System Menus
MENUS DESCRIPTION
Temperatures
Most commonly accessed menu. Operating Set Point, Differential settings, Tank Temperature and Tank Probe Offset are
located in this menu.
Heater Status
Current Operating State/Mode (heating/standby etc) and status (open/closed - on/off - yes/no) of monitored water heater
functions and components are displayed in this menu.
Economy Mode Setup Seven day 24 hour time clock with temperature set back capability to reduce operating costs during unoccupied or
reduced demand periods.
Alarm Output Setup
The control system’s CCB (Central Control Board) features on board SPDT (single pole double throw) relay contacts for
building EMS (Energy Management System) notification of operational conditions such as Fault Conditions and heating
mode status. This menu features a list of user definable conditions for relay activation.
Display Settings
Temperature units (°F or °C), appearance (brightness contrast) and backlight delay user adjustable settings are located
in this menu.
Heater Information
Elapsed time of operation, total heating cycle time, heating cycle count, heating element bank(s) cycle count and heat-
ing bank on time along with UIM and CCB software revisions can be viewed in this menu.
Current Fault/Alert Displays any current Alert or Fault messages.
Fault History
Retains 9 event history of Fault/Alert messages with time stamp. The Fault History is useful when dealing with intermit-
tent operational problems or when the customer has reset the control system prior to a service agent’s arrival.
Fault Occurrence
Running total of all Fault and Alert Conditions that have occurred are displayed in this menu. Can help determine poten-
tial root cause(s) of related operational problems.
Restore Factory
Defaults
This control system feature allows the user to restore control system user settings to their factory default settings. Alarm
Output Setup and Display Settings menu items ARE NOT changed when factory defaults are restored.
Help Menu
Accessible by pressing the corresponding Operational Button from most menus and screen displays. This menu
provides access to instructions and explanations for user settings, Operating States, Status Icons, manufacturer’s web
address, technical support phone number and service agent contact information.
TEMPERATURES MENU
OPERATING SET POINT
User adjustable setting 90°F to 190°F range; factory default
is 120°F. 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 Differential Setting.
Example: Operating Set Point is 120°F, the 1st Differential
Setting is 2°F (factory default). A call for heat will be activated
when the sensed water temperature drops to 118°F.
Figure 15. Temperature Screen
DIFFERENTIAL SETTINGS
Adjustable user setting(s) 1°F to 20° range; factory default
is 2°F. 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 Differential Setting associated with it. Differential
Settings are located in the Temperatures Menu.
There is a 1st Differential Setting on all models. There will be
Printed on 2/8/2018 9:05 AM CT