Installation - Mounting & Wiring - Salus Optima ST880ZB Manual

Section 2
Installation – Mounting & Wiring
BEFORE BEGINNING the installation procedure,
turn off power to the heating system .
Step 1. Determine the desired wiring configuration for the ST880ZB Thermostat . The following
chart shows the terminal designations for gas, electric or oil (Non-HP) and heat pump (HP)
installations . Appendix A provides reference wiring diagrams for typical thermostat installations .
Table 2.1: ST880ZB Optima Zigbee Thermostat Wiring Reference
Gas, Electric or Oil (Non-HP)
RC
RH
C
--
Y1
Y2
W1
W2
G
--
Step 2. If replacing an existing thermostat, review and record the existing wiring configuration:
• Remove thermostat from the wall to expose the wiring terminals
• Take a photograph or note the wire colors and designations (see wiring reference above)
• Attach wire labels provided to each of the existing thermostat wires
Step 3. Remove existing thermostat .
WRAP WIRES AROUND A PENCIL OR
SIMILAR OBJECT TO PREVENT THEM
FROM FALLING INTO THE WALL VOID
Step 4. Install the Mounting Plate .
Module 4 – Wireless HVAC Thermostats
ST880ZB Optima Zigbee Thermostat
24 VAC for Cooling System
24 VAC for Heating System
24 VAC Common Return
Reserved
Single / 1st Stage Cooling
2nd Stage Cooling
Single / 1st Stage Heating
2nd Stage Heating
Fan Signal
Reserved
Heat Pump (HP)
R 24 VAC for Heat Pump
-- Jumper to R
C 24 VAC Common Return
L System Monitor
Y1 Single / 1st Stage Compressor
Y2 2nd Stage Compressor
W1 Emergency Heat
O/B Changeover Valve
G Fan Signal
-- Reserved
LABEL WIRES TO CORRESPOND
TO THERMOSTAT TERMINALS
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