User's Manual

Appendix B-Additional Installation Options
7
EcoSmart VRF Controller
I, O & M Guide
Telkonet, Inc.
For Use with Firmware Version 2.x
20800 Swenson Drive, Suite 175
Appendix B-Additional Installation Options Waukesha, WI 53186
Revision 2.3 [phone]
Page 19 www.telkonet.com
Appendix B-Additional Installation Options
NTC Probe
Temp probes can be used for multiple purposes:
1) HVAC Discharge Air temp
2) HVAC Return Air temp
3) Supply Water Temp
4) AquaStat Mode (switches thermostat’s Heat/Cool)
If not using Telkonet provided external temperature probe, use a probe with a Beta R0 must match. Alternatively, a
probe can be provided to Telkonet for lab calibration.
US Sensor model USP10972 or equivalent, per the following:
 Resistance at 25 degrees C = 10 000 ohms +/- 1%
 Resistance/Temperature curve = "J"
 Beta ( 0 to 50 degrees C ) = 3892 degrees K nominal
Other models may be compatible; provide model number and specifications.
Analog Outputs
There are three analog outputs that can be used to control multiple functions. The desired function must be specified at
the time of programming. Each of the analog outputs must be configured in one of the following two ways:
1) Fan Coils Variable Valve Control 0-10 or 4-20mA (both Heat & Cool)
2) ECM Fan motor variable control between speeds. (0-10VDC)
Proportional Valve Control
Number of outputs
3 outputs
Connections
Output 1: J4-18
Output 2: J4-19
Output 3: J4-20
Common: J4-21
Selecting 0-10V or 0-20mA
Jumper installed across pins 1-2 for 0-20mA
Jumper installed across pins 2-3 for 0-10V
Jumper locations are:
Output 1: J10
Output 2: J9
Output 3: J7