6
802961 Rev. 00
Figure 1
OPERATION USING KEYPAD
When the unit is first plugged in, or when recovering from a
power outage, there will be a random 5 to 15 second delay
before the electronic control powers up. This minimizes the
large electrical surge that would otherwise occur if all units
in a building started up at the same time.
To Initiate Heating or Cooling Mode
Press On/Off Key to turn on the LED display and commence
full functionality. Push the °F/°C Key to obtain the desired
temperature scale. Press the Heat or Cool key as applicable,
and the current indoor temperature will be shown on the
display.
Set Desired Temperature
Press Cooler, or Warmer key as applicable. Each push of the
key increases or decreases the set point temperature by 1
degree, as applicable.
Set Fan Mode
Press Fan key to cycle through the fan settings as indicated
by the small circular LEDs. Select continuous High Speed
fan, continuous Low Speed fan, or Intermittent Fan by
selecting Auto. Auto cycles the fan on and off with the calls
for heating or cooling. Auto also sets fan speed according to
the amount of heating or cooling demanded. In Auto mode,
the fan will start up periodically to establish airflow; air
temperature will be sampled, and then the fan will shut off
again if there is no demand.
Disable Heating or Cooling, but Initiate Fan-Only
Press On/Off key to turn off LED display. Press Fan key to
cycle through the fan settings as indicated by the small
circular LEDs. Select continuous High or Low speed. Do not
select Auto, as it will turn the fan off.
CONTROL AT THE WALL THERMOSTAT
CONVERSION TO 24V REMOTE THERMOSTAT
Except for the wall thermostat and thermostat cable,
everything is included with the unit to field convert a
keypad-operated unit to 24 Volt AC wall thermostat
operation by qualified service personnel. Specific conversion
instructions are detailed on the wiring diagram affixed to
each particular unit to be converted. Conversion involves
accessing the high voltage wiring compartment and
changing a DIP switch setting on the electronic board. Once
the DIP switch setting has been changed, operation will be in
remote thermostat mode as soon as power is restored to the
control.
WARNING:
The conversion procedure involves exposure
to high voltage electrical circuits in the control box in order
to make the necessary change to the DIP switch, and must be
performed by qualified service personnel. Failure to do so
could result in property damage, personal injury or death.
Disconnect electric power to the unit before servicing.
A factory-supplied 24 Volt wiring harness is provided with
every unit to facilitate connection to the wall thermostat
wiring. One end has a multi-pin connector that mates with a
connector exiting the unit. The other end has preinstalled
butt splice connectors, which play a dual role in insulating
any unused connectors, and can also be used to make the
wire connections for wires that are used.
The final step is to apply the masking label provided, to
cover up the keypad. The keypad and display will be
disabled and no longer be available for control. The masking
label markings instruct the user to go to the wall thermostat
for controlling the unit.
COMPATIBLE THERMOSTATS
The features of the 24 VAC wall thermostat chosen will
dictate the extent of the features available from the unit.
