Alarm Output Setup Menu - A.O. Smith dre-52 Service Handbook

ALARM OUTPUT SETUP MENU

Permits user to set the condition (from a list of options) for when the CCB's integral alarm
output relay will be energized. Alarm relay connections (common, normally open, normally
closed) are located on the J3 terminal strip on the CCB (see page 42). Alarm output relay
contacts are capable of switching 1 amp maximum at 120 VAC.
The alarm relay operates in the background according to the settings in this menu and is not
capable of disabling water heater operation. The alarm relay is used for external notification/
verification of various operational conditions such as fault conditions and heating mode
status. This relay can be used with building EMS (Energy Management System) and other
external supervisory controls.
Output Function
Adjustable user setting. Available options for
the Alarm Output Function setting are:
Heating Mode: Used for heating mode on/off
status notification.
Enable / Disable Closed: Used for
notification and/or verification of the enable/
disable circuits open/closed status. There are
two enable/disable circuits available for
external supervisory control(s) at the J7
socket on the CCB - see page 42. Enable/
disable circuit(s) status can be viewed in the
Heater Status Menu - see page 54.
Temp < Heater SP: Used for external
notification when current tank temperature
drops below Operating Set Point.
Temp < Alarm SP: Used for external
notification when current tank temperature drops below programmable Alarm SP.
Fault or Alert: Used for external notification whenever a Fault or Alert condition is active.
Fault: Used for notification whenever a Fault condition is active.
Disabled: Disables the Alarm Relay Output Function.
Alarm SP
Adjustable user setting (90°F to 190°F) the control system uses for the "Temp < Alarm SP"
function described above. This setting has no effect with any other Alarm Output functions.
Alarm Output Settings
Changing the user settings in this menu is done using the same methods outlined in
Temperature Settings on page 53.
Service Note: Adjustable user settings in the Alarm Output Setup menu are unaffected by
Restore Factory Defaults (see page 63).
Servicing should only be performed by a Qualified Service Agent
ELECTRONIC CONTROL SYSTEM
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