ZEC510-3 controller - Multizone unit VAV with proportional reheat control wiring example - Verasys - Field Device - Verasys ZEC510 Variable Air Volume Controller

Figure 1. ZEC510-3 - Flow diagrams

Figure 2. ZEC510-3 - Wiring diagram

Table 1. ZEC510-3 - Wiring diagram
Number	Description	Name on the Verasys user interface	Terminal label	Object name	Signal type
1	24 V HOT power transformer	n/a
2	24 V COM power transformer	n/a
3	Optional. Supplemental heating percent command.	SUPPLEMENTAL HEATING OUTPUT	OUT1	SUPHTG-O	24 VAC Position Adjust Output (Floating)
4	Optional. Supply fan command	SUPPLY FAN COMMAND	OUT3	SF-C	24 VAC on/off, internally sourced
5	Optional. Heating percent command	HEATING STAGE OUTPUT	OUT4	HTG-O	0 VDC to 10 VDC
6	Optional. Heating stage command	HEATING STAGE COMMAND	OUT5	HTG-C	24 VAC on/off, externally sourced
7	Pressure ports. No polarity	n/a
8	Manual override	n/a
9	Optional. Supply air temperature sensor TE-631GV-2.	SUPPLY AIR TEMPERATURE	IN3	SA-T	Nickel 1K RTD
10	Optional. Relay: RIBU1C	OCCUPANCY STATUS	IN2	OCC-S	Dry Contact, Normally Open Normally Closed is configurable through the interface
11	Occupancy sensor OLS-2100-1. To red wire occupancy switch
12	Occupancy sensor OLS-2100-1. To neutral occupancy switch
13	Optional. Discharge air temperature sensor TE-631GV-2.	DISCHARGE AIR TEMPERATURE	IN1	DA-T	Nickel 1K RTD
14	To next device	n/a
15	From last device
16	See riser schedule to determine the EOL device. You must set the EOL switch to the ON position on the EOL device.
17	Zone temperature sensor NSB8BTN240-0. The connector is located on the back of the sensor.	ZONE TEMPERATURE	SENSOR BUS	ZN-T	SA bus
18	Optional. Zone CO₂ sensor NS-BCN7004-0. The connector is located on the back of the sensor.	ZONE AIR QUALITY or ZONE CO2	SENSOR BUS	ZN-CO2	SA bus

Note:

Figure 2 shows a connection to an electric SCR reheat coil that is proportionally controlled. You can use the same heating percent command signal, which is 0 V to 10 V, to control either an SCR reheat coil, or a proportional water valve, depending on what is present.
Supplemental valves use to the 60-second incremental actuator factory default value. You can adjust this in Verasys.
You can average up to five NS sensors. Connect the NS sensors in a daisy-chain configuration using the addresses in the Configuring the NS sensors section. The fifth sensor must have the fixed address 199.
If you install CO₂ Net sensors, in addition to the 24 VAC power for the controller, you must also supply 24 VAC power the HOT and COM terminals.