HVAC Mode — TEMPERING HICOOL (12) — The econ- omizer is at minimum vent position but the combination of the
HVAC Mode — VENT (13) — This is a normal operation mode where no heating or cooling is required and outside air is being delivered to the space to control IAQ levels.
HVAC Mode — LOW COOL (14) — This is a normal cool- ing mode where a low cooling demand is required.
HVAC Mode — HIGH COOL (15) — This is a normal cool- ing mode where a high cooling demand is required.
HVAC Mode — LOW HEAT (16) — The unit will be in low heating demand mode using either gas or electric heat.
HVAC Mode — HIGH HEAT (17) — The unit will be in high heating demand mode using either gas or electric heat.
HVAC Mode — UNOCC. FREE COOL (18) — In this mode the unit will operate in cooling but will be using the economizer for free cooling. Entering this mode will depend on the status of the outside air. The unit can be configured for out- side air changeover, differential dry bulb changeover, outside air enthalpy changeover, differential enthalpy changeover, or a custom arrangement of enthalpy/dewpoint and dry bulb. See the Economizer section for further details.
HVAC Mode — FIRE SHUT DOWN (19) — The unit has been stopped due to a fire shutdown input (FSD) or two or more of the fire control modes, purge, evacuation, or pressur- ization have been requested simultaneously.
HVAC Mode — PRESSURIZATION (20) — The unit is in the special fire pressurization mode where the supply fan is on, the economizer damper is open and the power exhaust fans are off. This mode is started by the Fire Pressurization (PRES) in- put which can be found in the INPUT→FIRE
HVAC Mode — EVACUATION (21) — The unit is in the special Fire Evacuation mode where the supply fan is off, the economizer damper is closed and the power exhaust fans are on. This mode is started by the Fire Evacuation (EVAC) input which can be found in the INPUT→FIRE
HVAC Mode — SMOKE PURGE (22) — The unit is in the special Fire Purge mode where the supply fan is on, the econo- mizer damper is open and the power exhaust fans are on. This mode is started by the Fire Evacuation (PURG) input which can be found in the INPUT→FIRE
HVAC Mode — DEHUMIDIFICATION (23) — The unit is operating in Dehumidification mode.
HVAC Mode — REHEAT (24) — The unit is operating in reheat mode.
Unit Configuration Submenu — The UNIT sub- menu under the Configuration mode of the local display contains general unit configuration items. The
Machine Control Type (C.TYP) — This configuration de- fines the control type and control source responsible for select- ing a cooling, heating, or vent mode and in determining the method by which compressors are staged. The control types are:
•C.TYP = 1
Both of these configurations refer to standard VAV opera- tion. If the control is occupied, the supply fan is run continuously and
accurate
•C.TYP = 3 (TSTAT-MULTI)
This configuration will force the control to monitor the ther- mostat inputs to make a determination of mode. Unlike traditional
•C.TYP = 4
This configuration will force the control to monitor the ther- mostat inputs to make a determination of mode and allow only 2 stages of control for both heating and cooling.
•C.TYP = 5 (SPT-MULTI)
This configuration will force the control to monitor a space temperature sensor to make a determination of mode. Unlike traditional
•C.TYP = 6 (SPT-2 STG)
This configuration will force the control to monitor the space temperature sensor to make a determination of mode and allow 2 stages of control for both heating and cooling.
FAN MODE (CV.FN) — The Fan Mode configuration can be used for machine control types (Configuration→ UNIT→C.TYP) 3, 4, 5, and 6. The Fan Mode variable establishes the operating sequence for the supply fan during occupied periods. When set to 1 (Continuous), the fan will operate continuously during occupied periods. When set to 0 (Automatic), the fan will run only during a heating or cooling mode.
REMOTE SWITCH CONFIG (RM.CF) — The remote switch input is connected to TB6 terminals 1 and 3. This switch can be used for several remote control functions. Please refer to the Remote Control Switch Input section for details on its use and operation.
CEM MODEL INSTALLED (CEM) — This configuration in- structs the control to communicate with the controls expansion module (CEM) over the Local Equipment Network (LEN) when set to Yes. When the unit is configured for certain sensors and configurations, this option will be set to Yes automatically.
The sensors and configurations that automatically turn on this board are:
Configuration→UNIT→SFS.M = 1 (Supply Fan Status Switch Monitoring)
Configuration→EDT.R→RES.S = Enable (4 to 20 mA Sup- ply Air Reset Sensor Enable)
Configuration→DMD.L→DM.L.S = 1 (2 SWITCHES) (Demand Limiting using 2 discrete switches)
Configuration→DMD.L→DM.L.S = 2
Configuration→IAQ→AQ.CF→IQ.I.C = 2 (IAQ DISC.OVR) (IAQ discrete switch “override” control)
Configuration→IAQ→AQ.CF→OQ.A.C = 1 (OAQ SENS- DAQ) (Outdoor Air Quality Sensor) Configuration→IAQ→AQ.CF→OQ.A.C = 2
Temperature Compensated Start Cooling Factor (TCS.C) — This factor is used in the equation of the Temperature Compen- sated Start Time Bias for cooling. Refer to the Temperature
35
