User's Manual

EcoSource Low Voltage Installation
Table 2: Wiring
Pin
Label on Backplate
Function
1
R (Power)
12-277VAC power from HVAC, used to power the thermostat
2 C (Common) AC Common
3
AUX (Auxiliary)
User defined
4
W1 (Heat) (Strip)
Heat call or strip heat call (depends on programming)
5 Switched Power 1 (W1/Y1) Provides alternate power for W1 and Y1
6
Y1 (Cool) (Comp)
Cool/Compressor call
7
G (Fan)
Fan Call - Low speed
8 O (B) (G2) (Y2) (Changeover)
Multi-use - depends on programming and site requirements:
• Changeover
• 2
nd
Stage Fan
• 2
nd
Stage Cooling
9 Switched Power 2 Provides alternate power for G, O, and W2
10
W2 (Y2) (G2) (G3) (Multi-speed)
Multi-use - depends on programming and site requirements:
• 2
nd
stage heat
• Electric heat (for HPs with strip heat, etc.)
• Emergency heat
Step 27 Low voltage only: ensure backplate has appropriate jumpers between R, SW1 and SW2. If
installing on a heat pump, ensure there is a jumper between Y1 and W1. See Figure 15 on page
16.
Step 28 Ensure no airflow from the JBOX or wall cavity is able to seep into the thermostat through the
wire harness. Telkonet recommends the use of UL approved caulk or UL rated insulating tape to
avoid false temperature readings. Figure 20 illustrates sections of insulating tape on the
backplate, covering the wall opening.
Step 29 Continue to Step 41
EcoWave Featuring EcoTouch IO&M Guide Telkonet, Inc.
For Use with Firmware Version 2.x 20800 Swenson Drive, Suite 175
EcoSour ce Waukesha, WI 53186
Revision 2 [phone]
Page 19 www.telkonet.com