J18 Input Field connections
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To wire a field-installed Smoke Detector contact or other shutdown device to the Symbio unit, use the J18 terminals on the Symbio 700 UC
1. All field wiring by dashed lines shall be Class
2. To shut down unit for emergency stop, connect field supplied control device across pins 1 & 2 unit stops when switch closes.
| Connector | Function | Pin # | Signal |
|---|---|---|---|
J18 |
Equipment Shutdown Input Connections |
1 |
24 Vac |
2 |
Equipment Shutdown Input |
Diagnostic Generated
Diagnostic generated when the input is in it's alarm state will be Diagnostic: Equipment shutdown input status.
The alarm state can be either normally open or normally closed depending on the Symbio 700 polarity setting which is dependent on the connected device contacts.
See Changing Polarity section for more details.
Changing Polarity
- The contacts are default to normally open (closure between UC-J18-1 and UC-J18-2 will shut the unit down)
- This can be changed with the Customer Connection Polarity feature in the Symbio Mobile Phone App.
- It's in Tools at the bottom of the page.
- Click the link below for more information
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.