Vent Control Lever
4. Rotate the vent control lever to either open or dose the
Vent Door Lever Positions
Hydronic Heat Installations
To avoid the risk of freezing the steam or water coil during
prolonged shut down periods, the vent door must be left closed
when the outdoor temperature might faU below freezing.
AIR DISCHARGE GRILLE
The discharge grille can be adjusted to expel air at either a 15'
or 40· angle.
Use the following procedure to change the angle of the discharge
1. Remove the front cabinet (see Front Removal).
2. Position the front so that the backside is accessible.
Discharge Air Flow
3. Remove the four (4) screws which secure the discharge air
grille to the cabinet front.
Discharge Air Flow Grille Removal
4. Rotate the grille 180· clockwise.
5. Reinstall the screws securing the discharge air grille to the
cabinet front. Reinstall the cabinet front on the unit.
To operate this unit with a "manufacturer-approved" remote
thermostat, configure the control to be operated by the remote
thermostat. Enter configuration mode C1 and then select option
Code l5 (see Configuration Settings in back of manual).
in the remote mode, the unit will only respond to the thermostat
inputs (terminal strip positions Gl (or GH), W2, Y /W1, and B*
shown in "Control Board User Inputs" illustration). NOTE: Once
configuration C1 with option code l5 has been selected, the
control touchpad will no longer accept inputs other than configu
ration and diagnostics modes. The room occupant must operate
the unit at the remote mounted thermostat.
NOTE: In remote mode, the 3-minutecompressor time delay, the
random restart feature and the freeze protection feature are all
active (see Unit Features section).
This unit is designed to be operated with remote wall mounted
thermostats. For further information on thermostats approved
for use with this unit, contact your sales representative.
For best performance results, the thermostat should be located
approximately five feet above the floor on a vibration free,
inside wall in an area with good air circulation.
Discharge Grille Orientation Options