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

Verasys ZEC510 VAV Controllers Installation Guide

Product name
ZEC510
Document type
Installation Guide
Document revision
B
Revision date
2021-04-08
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
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
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
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.