028-0506-02_II-VZ8250_EN www.viconics.com
January 2020
12
VZ8250
[
Installation Guide
]
6.5
REHEAT - DUCT
Supported output types:
•
0-10V Direct Acting
•
0-10V Reverse Acting
•
2-10V Direct Acting
•
2-10V Reverse Acting
•
Floating
•
On/Off
•
PWM
•
Valve NC
•
Valve NO
0-10V Analog Duct Heater
Terminal
Name
Connection
Required Settings
5
RC / 24 V~ Hot
24 V~ Hot
Duct Heater Configuration:
•
0-10V Direct Acting, or
•
0-10V Reserve Acting
6, 18 or 21
C / 24 V~ Common
24 V~ Common
12
UO12
0-10V Output
Floating Duct Heater
Terminal
Name
Connection
Required Settings
6, 18 or 21
C / 24 V~ Common
24 V~ Common
Duct Heater Configuration:
Floating
10
UO10
24 V~ Open Damper Actuator
12
UO12
24 V~ Close Damper Actuator
On/Off or PWM Duct Heater
Terminal
Name
Connection
Required Settings
6, 18 or 21
C / 24 V~ Common
24 V~ Common
Duct Heater Configuration:
•
On/Off, or
•
PWM, or
•
Valve NC, or
•
Valve NO
12
UO12
24 V~ Output
6.6
REHEAT - BASEBOARD
The VZ8250 controls baseboard heaters via:
•
Relay = 4 CPH (Cycles Per Hour)
•
PWM = 10-second duty cycle
•
Valve (Normally Open or Normally Closed) = 8 CPH (Cycles Per Hour)
Supported output types:
•
Relay On/Off
•
PWM
•
Valve NC
•
Valve NO
Relay with Transformer (Dry Contact)
Terminal
Name
Connection
Required Settings
7
RH
Room Controller Terminal 5 (24 V~)
Baseboard Reheat: Relay
8
BO8
24 V~ to Baseboard
24V~
Terminal
Name
Connection
Required Settings
5
RC / 24 V~ Hot
Room Controller Terminal 7 (RH)
Baseboard Reheat:
•
Relay, or
•
PWM, or
•
Valve NC, or
•
Valve NO
6, 18 or 21
C / 24 V~ Common
24 V~ Common
7
RH
Room Controller Terminal 5 (24 V~)
8
BO8
24 V~ to Baseboard