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Ventilation
The introduction of outside air is controlled by an automatic
damper. During normal operation, the damper will be open
whenever the Heat, Cool, or Fan control buttons are de-
pressed. If the indoor fan is not energized, the damper will be
closed.
A concealed cutoff switch is provided so that the damper can
be kept closed.
This switch is located at the front left-hand side of the cooling
chassis (See
Figure 14 on page
removing the front panel.
Remote Mounted Thermostat Installation
Units that are furnished with remote mounted thermostats
should be wired as shown in Figure 23. The connections for
field wiring are on a seven-position terminal board located on
the face of the control box. Other considerations for remote
mounted thermostat are as follows:
1. If slave units are to be employed, remove the jumper from
terminals A to C of the slave unit. Connect terminal A
of the master unit to the corresponding terminal A of the
slave unit as shown in Figure 23.
Figure 23: Remote Mounted Thermostat Wiring Connections
Manual Changeover Thermostat
Thermostat Part No. 0046736101
Subbase Part No. 0046742100
9). It can be reached by
The master unit is furnished with a 50 VA transformer that
is capable of handling up to 7 slave units. If additional
slave units are to be added, a larger field supplied
transformer must be mounted external to the unit. The
master and slave units draw 5.6 VA each. Furnish a
transformer to handle the number of slaves installed, plus
the master unit.
2. When using a programmable wall thermostat, connect the
common terminal of the thermostat to terminal A of the
unit terminal board. Refer to the instructions furnished
with the thermostat to locate the common terminal.
Note: It may be necessary to reduce the number of slave
units connected to the master or field supply a larger
transformer when using a programmable thermostat.
Check the VA draw of the chosen thermostat, plus the VA
draw of the master and slave units to be sure the total doesn't
exceed 50 VA power draw. Slave units are connected as de-
scribed in #1 above.
Automatic Changeover Thermostat
Thermostat Part No. 0060685101
Subbase Part No. 0002005963
Installation
IM 1068-2 / Page 15 of 28
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