A.O. Smith DSE-5, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Agent
63
ELECTRONIC CONTROL SYSTEM
HEATER STATUS MENU
This menu displays non adjustable operational information. Use the Up & Down Buttons to
navigate to the bottom and top of this menu.
Status
Displays the current Operating State of the
control system. IE: Heating, Standby, Fault.
Elements On #
Displays the number of heating elements the
control system has energized.
ECO Contact
Displays the current state of the ECO high
temperature limit switch contacts.
Enable / Disable 1 & 2
Displays the current state, open or closed, of
the two Enable/Disable circuits (J7 socket on
the CCB - see page 52) provided for external
supervisory controls such as building EMS
(Energy Management System). Both of these
Enable/Disable circuits must be closed to
“enable” heating operation. If either circuit is
open heating will be “disabled.” A plug with
two jumper wires is installed from the factory
in the CCB J7 socket to enable heating operation when external controls are not in use.
Service Note: If a supervisory control(s) is used to enable/disable heating operation, install
field wiring between the J7 socket on the CCB and a set of “dry contacts” on the external
control per all applicable building codes. This is a switching circuit only:
DO NOT apply any
external voltage or connect any load (IE: relay coil) to either circuit.
Element # On
Displays the on/off status of each heating element. Yes = On, No = Off.
Tank Full
Displays the status of the LWCO (Low Water Cut Off) device. Yes = water level is at or
above the LWCO probe, No = water level is low - see page 47.
Alarm Condition
Displays the status of the user definable Alarm Output function (see page 68). Yes = alarm
condition has been met, No = alarm condition has not been met.
Alarm Relay Output
Displays the state of the normally open contacts of the Alarm Output relay. This relay (J3
contacts on the CCB - see page 50) is used for building EMS (Energy Management System)
notification of operational conditions such as Fault conditions and heating mode status.
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