Procedure
- Terminate wiring according to Figure 2 if you are using staged outputs for the heating control. See Figure 1 if you are using incremental outputs for the heating control.
- Wire the network temperature sensor and CO2 sensor to the ZEC’s Sensor Bus.
- Wire the Zone Bus in a daisy chain.
- Ensure that the ZECs device address DIP switches are set to the appropriate device address. See Setup and adjustments. If necessary you can also activate the end-of-line (EOL) switch.
-
Connect the ZEC controller to 24 VAC, Class 2 power.
Figure 1. ZEC410-1 controller - VAV with staged reheat control wiring example
Figure 2. ZEC410-1 controller wiring diagram
Table 1. ZEC410-1 controller wiring diagram Callout
Description
Name on the Verasys user interface
Terminal label
Object name
Signal type
1
24 V HOT power transformer
n/a n/a n/a
n/a 2
24 V COM power transformer
3
Electric heat safeties
4
Optional. Heating stage command 1
HEATING STAGE COMMAND 1
OUT1
HTG1-C
24 VAC on/off, internally sourced
5
Optional. Heating stage command 2
HEATING STAGE COMMAND 2
OUT2
HTG2-C
24 VAC on/off, internally sourced
6
Optional. Supply fan command
SUPPLY FAN COMMAND
OUT3
SF-C
24 VAC on/off, internally sourced
7
Optional. Supplemental heating stage command
SUPPLEMENTAL HEATING STAGE COMMAND
OUT4
SUPHTG1-C
24 VAC on/off, externally sourced
8
Optional. Heating stage command 3
HEATING STAGE COMMAND 3
OUT5
HTG3-C
24 VAC on/off, externally sourced
9
Connect to air flow probe (Polarity & not important)
n/a n/a n/a
n/a 10
Manual override
11
Optional. Relay: RIBU1C
OCCUPANCY STATUS
IN2
OCC-S
Dry Contact, Normally Open
Normally Closed is configurable through the interface
12
Occupancy sensor OLS-2100-1. To red wire occupancy switch
13
Occupancy sensor OLS-2100-1. To neutral occupancy switch
14
Optional. Discharge air temperature sensor TE-631GV-2.
DISCHARGE AIR TEMPERATURE
IN1
DA-T
Nickel 1K RTD
15
To next device
n/a n/a n/a
n/a 16
From last device
17
See riser schedule to determine the EOL device. You must set the EOL switch to the ON position on the EOL device.
18
Zone temperature sensor NSB8BTN240-0. The connector is located on the back of the sensor.
ZONE TEMPERATURE
SENSOR BUS
ZN-T
Sensor Actuator (SA) bus
19
Optional. Zone CO2 sensor NSBCN7004-0. The connector is located on the back of the sensor.
ZONE AIR QUALITY or ZONE CO2
SENSOR BUS
ZN-CO2