Installation - Mounting & Wiring - Salus Optima ST880ZB Manual

Section 3
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
RjP
RC
RH
C
Y1
Y2
W1AX
W2OB
G
L
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
Module 4 – Wireless HVAC Thermostats
ST898ZB Optima S Thermostat
Gas, Electric or Oil (Non-HP)
24 VAC for Cooling System or Jumper to RjP
24 VAC for Heating System
24 VAC Common Return
Single / 1st Stage Cooling
2nd Stage Cooling
Single / 1st Stage Heating
2nd Stage Heating
Reserved
Heat Pump (HP)
Power Jumper (RH)
24 VAC for Heat Pump
Single / 1st Stage Compressor
2nd Stage Compressor
Auxiliary or Emergency Heat
Changeover Valve
Fan Signal
System Monitor
LABEL WIRES TO CORRESPOND
TO THERMOSTAT TERMINALS
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