12
Single-Duct and Retrofit Terminal Units IOM
THERMOSTAT INSTALLATION
For proper operation, mount the thermostat on an interior
wall. Do not mount the thermostat in a location that will
cause it to be affected by direct sunlight or other heat or cold
sources. The thermostat should be clear of all obstructions
so it can properly sense the room temperature. Complete
rough-in wiring at each location prior to thermostat
installation. Cable insulation must meet local building codes.
1. Remove thermostat cover. If the thermostat is locked on
the back plate, turn the two hex screws in on the bottom
of the cover (in the two outermost holes) in the back plate
CLOCKWISE until they clear the cover. Do not remove
these screws completely. Swing the thermostat up and
away from the back plate to remove it.
2. Route the wires through the opening in the back plate.
3. Install the back plate directly to the junction box using
the screws supplied with the thermostat. Verify the hex
screws used for securing the cover are located at the
bottom before installing.
4. Connect the wires to the terminal block. Refer to the
wiring diagram located on the inside cover of the control
enclosure of each unit showing the wiring terminations.
The wiring schematic can also be found on the control
sequence submittal found on the Krueger website.
5. Replace the thermostat cover. Turn the two hex screws
COUNTER CLOCKWISE until they are flush with the
bottom cover and secure it to the back plate.
PROGRAMMING THERMOSTAT
1. The thermostat has three sequences that are selectable
from the display screen. To access the configuration
menu on the thermostat, press and hold the Up and
Down arrows for 10 seconds until the display starts
flashing LIMITS. Use the Up and Down arrows to scroll
between the different menu options or set a specific
value. Use the Setpoint button to select a menu or set
a value.
2. To set the minimum and maximum airflow limits, Use
AO1 Min and AO1 Max or AO2 Min and AO2 Max. Use the
Table 4 below to determine thermostat setting for the
CFM per inlet size.
3. For details on how to program the thermostat for each
control sequence see the specific control sequence
submittal. The control sequence submittals can be at the
Krueger Website:
NOTE:
Default Settings are as follows:
• AO1 – MIN=0, MAX=12, AUX=0
• AO2 – MIN=0, MAX=12
• DEAD BD (deadband) = 2° F
• SETBACK (standby/unoccupied setback) = 2° F
• PROP BD (loop proportional band) = 2° F
• Rm OFST (room temperature offset) = 0
• CNG OVR (changeover temperature) = 77° F
• ITIME (loop integral time) = 30 minutes