mars 7602-457 Communicating Programmable Thermostat Instruction Manual
| General | Details |
|---|---|
| Name | mars 7602-457 Communicating Programmable Thermostat Instruction Manual |
| Make | MARS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.49 MB |
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Mars 7602-457 Manual: Questions and Answers
What wires do I need to connect on the Mars 7602-457?
Both R and C terminals must be connected. The thermostat is not a power stealing device.
| Terminal | Purpose |
|---|---|
| C | 24V Common for Control Circuit |
| R | 24V Supply for Control Circuit |
| A+ | Communications (Positive) |
| B- | Communications (Negative) |
| GND | Ground |
| OD | Outdoor Temperature Sensor |
What does Heating Delta T mean on the Mars 7602-457?
Temperature differential setting for vFlow units with motorized modulating valves. Valid range is 4 to 12°F in 1°F increments, with a default stored in the control. Instruction Manual, p. 9
Can I configure multiple units on one Mars 7602-457 thermostat at the same time?
No. To configure Unit, Pump, and Valve options, the thermostat must be connected to only one unit at a time. Instruction Manual, p. 9
What's the difference between Heating Delta T and Cooling Delta T on the Mars 7602-457?
Heating Delta T valid range is 4 to 12°F; Cooling Delta T valid range is 9 to 20°F. Both adjust in 1°F increments. Instruction Manual, p. 9
What does the Off Position setting control on a modulating valve configuration?
Determines how open the valve stays when the unit is not operating. Off position 0.0 means fully closed; values between 3.3-4.0 keep it slightly open for certain commercial multi-unit applications. Instruction Manual, p. 9
What do the icons mean on the Mars 7602-457 thermostat display?
| Display Element | Meaning |
|---|---|
| LT1 TEMP | Low temperature sensor reading |
| LT2 TEMP | Second temperature sensor reading |
| COMP DISCHARGE | Compressor discharge temperature |
| ENTERING WATER | Water entering the system temperature |
| LEAVING WATER | Water leaving the system temperature |
| HOT WATER EWT | Hot water entering water temperature |
How do I navigate through menus and select options on Mars 7602-457?
Use arrow buttons to move between screens and options.
| Button | Function |
|---|---|
| Left/right arrows | Navigate between configuration screens |
| Up/down arrows | Navigate between fault codes |
| Center button | View more information about highlighted item |
How can I tell if a fault code is stored in the Mars 7602-457?
Enter Fault History mode to view the five most recent fault codes recorded by the thermostat and connected communicating controls. Instruction Manual, p. 14
What is the default Blower Off Delay setting on Mars 7602-457?
60 seconds, with a valid range of 0 to 255 seconds in 5 second increments. Instruction Manual, p. 7
Where do I find the installer settings on Mars 7602-457 communicating programmable thermostat?
Hold the up and down arrow buttons simultaneously for 5 seconds while the thermostat is in OFF Mode. Access from the Main Operating screen. Instruction Manual, p. 6
