Mars 70812 Installation And Operating Instructions Manual Download | Manualshive

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INSTALLATION AND OPERATING INSTRUCTIONS

5-1-1 Programmable Electronic

Thermostat Heat/Cool

®

Model

70812

70812-IM 12/21/06 3:06 PM Page 1

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Summary of Contents for 70812

Page 1: ...INSTALLATION AND OPERATING INSTRUCTIONS 5 1 1 Programmable Electronic Thermostat Heat Cool Model 70812 70812 IM 12 21 06 3 06 PM Page 1 ...

Page 2: ...is will damage the thermostat and void the warranty This thermostat is equipped with automatic compressor protection to prevent damage due to short cycling The short cycle protection provides a 5 minute delay between heating heat pump models or cooling cycles to prevent the compressor from being damaged Do not switch the system to cool if the outdoor temperature is below 50 F 10 C This may damage ...

Page 3: ...be best viewed from a front downward angle 3 Remove the back plate of the thermostat by gently depressing the bottom locking tab and swinging the back plate up and away 4 Place the back plate against the wall in the desired mounting location with the thermostat wires protruding from the wall through the large rectangular whole in the back plate 5 Mark placement of the 2 mounting holes oval shaped ...

Page 4: ... tab snaps into place NOTE The terminal board pins must be properly aligned with the sockets on the terminal board on the back plate in order for the front body to properly snap into place 11 Set the system switch to the OFF position 12 Set the fan switch to the AUTO position 13 Open the front thermostat door and open the battery compartment door install 2 AA Alkaline batteries included 14 Remove ...

Page 5: ... the temperature set point is at least 3 degrees below the room temperature The LCD will display a snowflake icon to indicate A C The cooling system should start within sever al seconds WARNING Do not perform this test if the outdoor temperature is below 50 F 7 Set the system switch to the OFF position The system should shut down within several seconds The LCD will again alternately display the ti...

Page 6: ...s the PROGRAM and RUN keys three times The LCD liquid crystal display will display the fan delay setting in seconds Use the red and blue arrow keys to set the delay time to the desired setting of 0 30 or 60 seconds 2 When the desired setting is made release the arrow key and the unit will automatically store the setting after 15 seconds Programming Operating The New Thermostat Setting the Time Day...

Page 7: ...e the red blue arrow keys to select the set point temperature for the Morning program for Mon Fri 4 While the temperature is still blinking press the TIME DAY key to set the time for the Morning program The time in the LCD will blink Use the red blue arrow keys to select the correct time Program System Weekday Saturday Sunday MORN Heat 6 00am 70 F 21 0 C 6 00am 70 F 21 0 C 6 00am 70 F 21 0 C Cool ...

Page 8: ...or lower the set point temperature at any time during nor mal operation The temperature will hold at the new level UNTIL the next program period begins at which point the thermostat will return to the program temperature Vacation Hold 1 The thermostat can be set to hold a single specific temperature for up to 30 consecutive days Upon activation the thermostat will hold the temperature until the du...

Page 9: ...7 c a mechanical bimetal switch will shut off the thermostat Low Temperature Protection While in the HEAT position if the room temperature drops below 40 F 4 C the thermostat will automatically initiate a call for heat 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...

Page 10: ...n from this position depress and hold the PROGRAM key for 3 seconds The counter will reset to 000 Hr Low Battery Detection Low battery power is displayed by the illumination of a battery icon in the LCD The thermostat can operate for a period of 2 months once the warning has been initiated Two fresh AA Alkaline batteries should be installed as soon as the warning icon illuminates Image shows the f...

Page 11: ...rential decreases too frequently or cycle rate and a low differential increases cycle rate not enough Display is not illuminated Touch the up or down arrow key Display will illuminate for 10 seconds Room temperature and Normal depending on differential setting set point disagree Check for drafts that could quickly change the room temperature before the system is able to correct it System fan runs ...

Page 12: ...12 Wiring Diagrams Typical 5 Wire System RC RH G Y W B O Inst HEAT 24 VAC TRANSFORMER COM HOT COOL 24 VAC TRANSFORMER COM HOT FAN CONTROL COOL CONTROL HEAT CONTROL 70812 IM 12 21 06 3 06 PM Page 12 ...

Page 13: ...al Single Stage Heat Pump System RC RH G Y W B O Install Jumper Install Jumper C TR REV VALVE COOL ENERGIZED 24 VAC TRANSFORMER COM HOT FAN CONTROL COMPRESSOR CONTROL REV VALVE HEAT ENERGIZED 70812 IM 12 21 06 3 06 PM Page 13 ...

Page 14: ...ll Jumper COOL 24 VAC TRANSFORMER COM FAN CONTROL COOL CONTROL HEAT CONTROL 24 VAC TRANSFORMER HOT Typical 4 Wire System RC RH G Y W B O Install Jumper COOL 24 VAC TRANSFORMER HEAT CONTROL COM 24 VAC TRANSFORMER HOT COOL CONTROL FAN CONTROL 70812 IM 12 21 06 3 06 PM Page 14 ...

Page 15: ... who purchased the product from a wholesaler For warranty claims consumers should contact the contractor or dealer who installed the thermostat This warranty and Motors Armatures liability does not include damage to merchandise or thermostat resulting from accident alteration neglect misuse improper installation or any other failure to follow Motors Armatures installation and operating instruction...

Page 16: ...INSTALLATION AND OPERATING INSTRUCTIONS 5 1 1 Programmable Electronic Thermostat Heat Cool Model 70812 70812 IM 12 21 06 3 06 PM Page 16 ...

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