Table 5: VAV wiring diagram
Number Description Object name (if
given)
1 Economizer Damper Output (optional) MAD-O
2 Supply fan output (to fan VFD) SF-O
3 Supply fan command (to fan VFD) SF-C
4 Compressor stage 1 command COMP1-C
5 Reversing valve 1 command REV1-C
6 Compressor stage 2 command COMP2-C
7 Reversing valve 2 command REV2-C
8 Supplemental heat command SUPHTG-C
9 24 V HOT to damper motor n/a
10 24 V COM to damper motor n/a
11 24 V COM n/a
12 24 V HOT n/a
13 From last device n/a
14 To next device n/a
15 Zone humidity sensor - monitor only (optional) ZN-H
16 Return air CO2
Range: 0 ppm to 2,000 ppm, 0 VDC to 10 VDC RA-CO2
Table 5: VAV wiring diagram
Number Description Object name (if
given)
17 Return air temperature sensor RA-T
18 Outside air temperature sensor
Note: This is a required sensor if the VEC100
controls the economizer. Position the sensor
in a shaded area on the north side of the
building.
OA-T
19 Discharge air static pressure sensor
Range: 0 in. W.C. to 5 in. W.C., 0 VDC to 5 VDC DA-P
20 Discharge air temperature sensor DA-T
21 Condensate alarm COND-A
22 Supply fan status (air proving switch, optional) SF-S
23 Purge input (optional) PURGE-S
24 Filter status (optional) FILTER-S
Commissioning the system
To activate the outputs and verify system operation, navigate to the Commissioning menu, change Start
Commissioning to Trigger, and adjust outputs individually.
The following table describes the Details > Service > Factory menu options.
Table 6: Details : Service : Factory
Object or parameter Description Adjustable Defaults Enum set or range
Number of Heat Pump
Stages Installed
Sets the number of heat pump stages installed. Adjustable 2 0 to 2
Supplemental Heat
Installed
Sets whether supplemental heating is installed. Adjustable No 0 = No
1 = Yes
Economizer Installed Sets whether the economizer is installed. Adjustable No 0 = No
1 = Yes
Air Proving Switch Setup Selects the type of setup for airflow proof. Adjustable None 0 = Fan Status Device
1 = Duct Static Pressure Sensor
2 = None
Runtime Equalization Enables the device based on runtime. Adjustable No 0 = No
1 = Yes
OAT Cooling Lockout
Temperature
Sets the temperature at which outside cooling lockout occurs. Adjustable 50°F (10°C) 0°F to 100°F (-18°C to 38°C)
Economizer Minimum
Position Setpoint
Sets the minimum outside air damper position. Adjustable 20% 0% to 100%
Rooftop Controller Type Sets the controller type to changeover bypass or VAV. Adjustable Changeover Bypass 0 = Changeover Bypass
1 = VAV
Variable Speed Drive Sets whether the VEC100 controls a VFD fan instead of a bypass
damper when the rooftop controller type is set to changeover
bypass.
Adjustable False 0 = False
1 = True
Supply Air Temperature
Alarm Offset
If SAT is not in this value range, the SAT alarm delay starts.
Examples: If the supply air setpoint is 55°F and this is set to 5°F,
then the supply air must be under 60°F, or the delay timer starts. If
the supply air setpoint is 110°F and this is set to 5°F then the supply
air must be above 105°F, or the delay timer starts.
Adjustable 5 delta °F (2.78 delta °C) 0 delta °F to 25 delta °F (0 delta °C to 14
delta °C)
Supply Air Temperature
Alarm Delay
Sets the amount of time that must pass before the SAT alarm
occurs.
Adjustable 20 min 0 min to 120 min
Cancel ASCD Timers Resets the minimum on and off timers. Adjustable False 0 = False
1 = True
Demand Ventilation
Feature
Enables or disables the demand ventilation feature. Adjustable Off 0 = Off
1 = On
Reversing Valve Config Sets the reversing valve for heating or cooling Adjustable On for Clg 0 = On For Htg
1 = On For Clg
Condensate Alarm If you set this parameter to Yes, the condensate alarm shuts down
the whole system.
Adjustable No 0 = No
1 = Yes
VEC100 Generic RTU Heat Pump Controller Quick Start Guide 7
