American Water Heater 120 series, Инструкция по эксплуатации, Страница: 24 / 52

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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.
Table 7. Operating States
State Description
Standby
The water heater is not in an active heating cycle. This usually indicates the temperature in the tank has
reached the Operating Set Point and the control system has terminated the heating cycle.
Heating
The control system is in the Heating Mode. At least one bank of heating elements has been energized.
Alert
The control system has detected/declared an Alert Condition. The controls system will continue heating
operation. However, a Qualified Service Agent should be contacted to check/service the water heater.
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 cor -
rected.
Table 8. 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 moni -
tored 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 unoc -
cupied or reduced demand periods.
Alarm Output
Setup
The control system’s CCB (Central Control Board) features on board SPDT (single pole double throw) re -
lay 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 set -
tings 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 heating 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 intermittent 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 potential 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
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.