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Summary of Contents for Mars 70810
- Page 1 70810-IM 12/21/06 2:52 PM Page 1 ® 70810 Model INSTALLATION AND OPERATING INSTRUCTIONS 5-2 Programmable Electronic Thermostat Heat/Cool...
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Page 2: Specifications
70810-IM 12/21/06 2:52 PM Page 2 Compatible with low voltage single stage gas, oil or electric heating or cooling systems and single stage heat pumps. For use on 24VAC systems (not to exceed 30VAC) and 250mv to 750mv millivolt heating only systems. - Page 3 70810-IM 12/21/06 2:52 PM Page 3 Removing The Existing Thermostat 1) CAUTION: Make certain the power to the system has been disconnected. 2) Remove the cover of the old thermostat and locate the wires that are connected to the terminal board.
- Page 4 70810-IM 12/21/06 2:52 PM Page 4 9) Carefully place the thermostat body face down on a soft surface to expose the main circuit board. Gently set the following switches in the correct position for the application. • GAS / ELECTRIC: Configures the thermostat to either gas/oil or electric heating systems. For electric, se the switch to HE.
- Page 5 70810-IM 12/21/06 2:52 PM Page 5 2) Set the fan switch to the ON position. The system blower should start. 3) Set the fan switch to the AUTO position. The system blower should stop. 4) Set the system switch to the HEAT position and depress the red arrow key until the temperature set point is at least 3 degrees above the room temperature.
- Page 6 70810-IM 12/21/06 2:52 PM Page 6 2) When the desired setting is made, release the key and the unit will automatically store the setting after 15 seconds. Programming & Operating The New Thermostat Setting the Time & Day 1) With the thermostat in set at either COOL, OFF, or HEAT, depress the TIME/DAY key. The hour will flash.
- Page 7 70810-IM 12/21/06 2:52 PM Page 7 Customizing the Program 1) Set the System switch to the HEAT or COOL position and the Fan switch to either the AUTO or ON posi- tion. NOTE: In AUTO, the system blower will run only when the A/C or heat is running. In ON, the system blower will operate continuously.
- Page 8 70810-IM 12/21/06 2:52 PM Page 8 Vacation Hold Image shows 1 day 1) The thermostat can be set to hold a single specific temperature for up to hold at 73 F 30 consecutive days. Upon activation, the thermostat will hold the tem-...
- Page 9 70810-IM 12/21/06 2:52 PM Page 9 • Compressor Protection: To protect the system compressor(s) from damage, the thermostat features a 5 minute delay. After the cooling system (or heat pump turns off), the thermostat will not allow it to re-start until the 5 minute delay expires.
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Page 10: Troubleshooting
70810-IM 12/21/06 2:52 PM Page 10 Troubleshooting SYMPTOM CORRECTIVE ACTION Display is blank Check thermostat wiring & connections. Check circuit breaker/fuse panel. Set system switch to HEAT and raise set point above room temperature. No heat If flame icon is blinking, allow the 5 minute compressor lock-out to expire. -
Page 11: Wiring Diagrams
70810-IM 12/21/06 2:52 PM Page 11 Wiring Diagrams Typical 4-Wire System Install Jumper HEAT CONTROL CONTROL COOL CONTROL 24 VAC TRANSFORMER... - Page 12 70810-IM 12/21/06 2:52 PM Page 12 Wiring Diagrams Typical 5-Wire System COOL HEAT CONTROL CONTROL CONTROL COOL 24 VAC HEAT 24 VAC TRANSFORMER TRANSFORMER...
- Page 13 70810-IM 12/21/06 2:52 PM Page 13 Wiring Diagrams Typical 2-Wire Millivolt System HEAT CONTROL 24 VAC TRANSFORMER...
- Page 14 70810-IM 12/21/06 2:52 PM Page 14 Wiring Diagrams Typical Single Stage Heat Pump System Install Jumper Install Jumper REV. VALVE CONTROL COOL ENERGIZED REV. VALVE COMPRESSOR HEAT ENERGIZED CONTROL 24 VAC TRANSFORMER...
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Page 15: One-Year Limited Warranty
Warranty ONE YEAR LIMITED WARRANTY Motors & Armatures Inc. warrants each new MARS thermostat against any defects due to non-conforming material or workmanship for a period of one year after the original date of purchase by a professional service technician and does not include the cost of removal or re-installation. - Page 16 70810-IM 12/21/06 2:52 PM Page 16 INSTALLATION AND OPERATING INSTRUCTIONS 5-2 Programmable Electronic Thermostat Heat/Cool 70810 Model ®...
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