McQuay Incremental PDNC Series, Установка и обслуживание данных

Страница: 10 / 28

IM 422 / Page 10 of 28
Non-programmable Thermostat
– The unit can be easily
controlled with a remote mounted, low voltage wall thermostat.
Several variations of low voltage wall thermostats are available.
These variations can be separated into two categories: Non-
programmable and Programmable. Either type of thermostat will
work with the Incremental conditioner. Figures 19–22 illustrate
the typical wiring schematics for proper connection of the units
to the wall thermostat.
Figure 19. Non-programmable Thermostat
Factory Supplied
Low Voltage
Plug & Receptacle
Disconnect
Wires From Control
Figure 20. Master/slave with Non-programmable Thermostat
Factory Supplied
Low Voltage
Plug & Receptacle
Disconnect
Wires From Control Master Unit
NOTE: When employing a slave, sever
the BK wire loop of the Slave Unit.
Wires From Control Slave Unit
Thermostat Wiring Configurations
The Remote Consists of 10 Push-buttons
• Power:
Functions same as ON/OFF button on the touch pad.
• Sleep:
Functions same as SLEEP button on the touch pad.
Wireless Remote Control (Optional)
Mode Buttons
• Heat, Cool, Cool/Dry, Fan:
Performs same function as the MODE button on the touch
pad, and allows user to select specific mode of operation
using only one button.
• Temp Buttons +, – :
Functions same as buttons on touch pad, allowing user to
change the setpoint.
• Fan Speed Buttons (High & Low):
Performs same function as the FAN SPEED button on the
touch pad, allows user to select specific speed using only
one button.
Remote must be aimed in a line of sight of the window in
upper right corner on the front panel, at less than a 45
o
angle
from center of the window.
The control board will beep when any button is pressed on
the Remote control to confirm signal.
Master/slave Operation
– When using remote mounted
thermostats, it is often necessary to control more than one
Incremental conditioner from a single thermostat. Figures 20 and
22 illustrate schematically how a master unit and slave unit(s)
are connected to a single thermostat. Note that when employing
a slave unit, the BK wire loop of the slave unit is severed. This
takes the slave’s transformer out of the circuit, allowing it to du-
plicate the operation of the master unit. The master’s transformer
handles 10 VA power draw. The master and slave each draw 5
VA, therefore if more than one slave unit is to be used, the mas-
ter transformer must be replaced with a larger one. The number
of slave units that can be connected is limited to the maximum
amperage of the thermostat contacts.