Central Desk Control; Control Features; Remote Thermostat; User Controls - GE Zoneline Generation-3 2800 Series Service Manual

User Controls

The user controls are located behind a door in the
top, right of the room cabinet. They are normally
used to control the day to day operation of the unit.
The room cabinet does not have to be removed to
operate these controls.
The vent door control is located on the left side of
the unit. Removal of the room cabinet is required to
remove shipping screws and change its setting. The
vent door control is factory set at CLOSE (see
).
Door and Cable

Remote Thermostat

The unit can be controlled by an externally mounted,
remote thermostat.
The Zoneline thermostat connections provide 24 VAC
only. If a digital/electronic wall thermostat is being
used, it must be set to the 24 VAC setting. Refer to
the thermostat installation instructions for details.
Note: Some thermostats can be programmed to
energize the reversing valve in the heating mode
or cool mode. If the thermostat is not programmed
correctly, the unit will heat when the thermostat
is set to cool, and cool when the thermostat is set
to heat. Refer to the instructions provided with the
thermostat for thermostat programming procedures.
Also refer to the reversing valve section of the
components.

Control Features

LOW
FAN
HIGH
STOP
FAN
LOW
LOW
HEAT
COOL
HIGH HIGH
HEAT COOL
Vent
– 25 –

Central Desk Control

Some customers may want to control the unit from
a remote location with a central controlling device.
The general term given to systems such as this
is Central Desk Control (CDC). The most common
installation of this type of system is a switch
mounted at the registration desk. Upon guest
check-in, a button is pushed or a switch is moved to
allow the air conditioner to operate. Likewise, when
the guest checks out the device is put into the OFF
position so the unit will not operate while the room
is vacant.
It is not necessary that the controlling device
be located at a central desk to control the unit
operation. In some resort areas, devices are
connected to sliding glass doors. Opening the
door causes a contact to close, turning the air
conditioner off. This prevents the waste of energy
by not allowing the air conditioner to operate when
warm humid air is entering the room.
Some systems operate by motion sensors or heat
sensing detectors mounted in the room. These
types of systems determine occupant presence in
the room and control the unit accordingly. If no one
is in the room, the device signals the air conditioner
to turn off.
There are a wide variety of devices available, each
with its own benefi ts and constraints. While GE
does not offer components that are external to the
unit for a CDC system, GE Zonelines are compatible
with most CDC and energy management systems.
Zonelines provide a 24 VAC circuit that powers the
CDC system and no external power is needed.
All Zoneline 2800, and 3800 Series units are
compatible with a simple on/off 2-wire Central Desk
Control system. Consult with the provider of other
energy management systems to be sure they are
compatible with the GE Zoneline. Zonelines have
standard connectors factory installed to provide a
CDC interface that permits the unit to be connected
to most of the energy management systems. The
devices connected to the Zoneline units require no
power supply or transformers external to the unit.
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