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
Heating stage 1 command
HTG1-C
5
Heating stage 2 command
HTG2-C
6
Cooling stage 1 command
CLG1-C
7
Cooling stage 2 command
CLG2-C
8
Cooling stage 3 command
CLG3-C
9
Cooling stage 4 command
CLG4-C
10
24 V HOT to damper motor
n/a
11
24 V COM to damper motor
n/a
12
24 V COM
n/a
13
24 V HOT
n/a
14
From last device
n/a
15
To next device
n/a
16
Zone humidity sensor - monitor only (optional)
ZN-H
Table 5: VAV wiring diagram
Number Description
Object name (if
given)
17
Return air CO
2
Range: 0 ppm to 2,000 ppm, 0 VDC to 10 VDC
RA-CO2
18
Return air temperature sensor
RA-T
19
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
20
Discharge air static pressure sensor
Range: 0 in. W.C. to 5 in. W.C., 0 VDC to 5 VDC
DA-P
21
Discharge air temperature sensor
DA-T
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 Cooling Stages
Installed
Sets the number of cooling stages installed.
Adjustable
2
0 to 4
Number of Heating
Stages Installed
Sets the number of heating stages installed.
Adjustable
2
0 to 2
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
Equalize Cooling Stages
Runtime
Enables the compressors to run in lead/lag mode 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
Product warranty
This product is covered by a limited warranty, details
Software terms
Use of the software that is in (or constitutes)
this product, or access to the cloud, or hosted
services applicable to this product, if any, is
subject to applicable end-user license, open-source
VEC100 Generic RTU Controller, Staged Heating and Staged Cooling Quick Start Guide
7
