ES-20
Stepper motor control for Alco ESR-20 A — A
Safe-NET control module is required for this mode.
(See section on Safe-NET wiring for proper equipment,
techniques and safety considerations).
ES-12
Stepper motor control for Alco ESR-12 A — A
Safe-NET control module is required for this mode.
(See section on Safe-NET wiring for proper equipment,
techniques and safety considerations).
NONE
No valve or other temperature control mechanism
attached. Safe-NET used for monitoring purposes only.
CSELF
Safe-NET display module performing ON/OFF control
independent of a Safe-NET control module, but
operating under a control module for defrost
coordination. Such applications could include walk-in
coolers with multiple evaporators.
SELF
Safe-NET display module performing ON/OFF control
independent of a Safe-NET control module. The
Safe-NET display module can exist on a network as a
sole entity receiving command from a master device.
It controls all functions of the fixture if so equipped
(defrost, lighting, dual-temperature operation,
temperature control, alarming, etc.)
OnOff
Safe-NET display module acting as user I/O for a
Safe-NET control module. The Safe- NET display module
performs the on/off control and schedules defrost, case
lighting, and evaporator fan control through the
Safe-NET display module control outputs.
VPOS
This menu item is for display purposes only. When an
EEXP, EER or VSD compressor is controlling unit
temperature, the relative position in steps for a stepper
motor driven valve or % running speed is displayed. The
value range is dependent on the valve type selected.
4-45
P/N 0461391A
Hussmann Corporation • Bridgeton, Missouri 63044-2483 U.S.A.
Safe-NET™
VPOS
Value
Menu Structure — VPOS
Summary of Contents for ARL
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