8
Dry contact alerts
EQUIPMENT DAMAGE HAZARD.
Do not apply power to S1–S4 terminals.
Do not connect a temperature sensor to the S1–S4 terminals if set for a dry
contact device.
NOTE:
The dry contact device must be rated for low voltage.
If you are not using the S1–S4 terminals on the EIM, you can connect them to
a dry contact device to display an alert. Dry contact alerts include Full Drain
Pan, Dirty Filter, Water Leak, System Shutdown, Service Needed, Fan Failure and
Custom Alert. Dry contact device can be normally-open (shown in diagram) or
normally-closed.
NOTE:
You can connect multiple Dry Contact devices in parallel to the S1–S4
terminals.
MULTIPLE DRY CONTACT DEVICES
ON ONE SET OF TERMINALS
EIM
M38718
ONE DRY CONTACT DEVICE
MULTIPLE DRY CONTACT DEVICES
ON ONE SET OF TERMINALS
EIM
ONE DRY CONTACT DEVICE
S3
S3
S4
S4
S1
S1
S2
S2
