will this work with a 750 mV system?

I had this thermostat installed in one of my rental units. It worked great for about 1 year. My renter complained of the heat not coming on at the agreed upon temperature set point (72 degrees F). My renter would increase the set point and the heater would then come on. After investigating the situation, I discovered smoke had contaminated the thermostat contacts. After cleaning the contacts the thermostat would function as designed until smoke contaminated the contacts again. I installed a thermostat having sealed contacts which solved the problem. So, bottom line, yes this thermostat will work on a 750 mv system. However, if this thermostat operates in a contaminated environment be prepared to clean the contacts periodically.

I have 3 wires,This thermostat has only connections for 2 wires.Can I still use it?

This will depend on your situation. If you are just trying to use it for turning on and off a heat source, then it should work just fine. Follow the instructions carefully. Even though you have 3 wires, I'm guessing one of the 3 is not being used. Follow the wire to the other end and see if all 3 wires are hooked up. If there are only 2 hooked up, those same 2 wires will be what you use at the stat. The stat is just like a light switch, just lower voltage. Power will come from your transformer, through the stat, then to the device control you want to turn on. If you have a unique situation and need more help, you can take some pictures and describe your application and send them to me at samoore@parker.com and I will do my best to help you out.

is this a 2 wire connection?

yes 2 wire, but be careful...no off switch even though picture may show one.

Where to set adjustment lever for a lp gas fireplace? i tried 0.4 (factory setting / gas <90% eff) and fireplace had lower flame than before.

this unit only activates a contact that is activating buy the temp that the setting is placed at, it does not control the amount of gas at your fireplace, or how the flame is burning

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Q: Where to set adjustment lever for a lp gas fireplace? i tried 0.4 (factory setting / gas <90% eff) and fireplace had lower flame than before.

this unit only activates a contact that is activating buy the temp that the setting is placed at, it does not control the amount of gas at your fireplace, or how the flame is burning

ASIN	B000BQWADS
Additional Features	Heat Only
Backlight	Yes
Best Sellers Rank	#4,114 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Home Nonprogrammable Thermostats
Brand	Honeywell Home
Brand Name	Honeywell Home
Color	White
Connectivity Protocol	Ethernet
Connectivity Technology	Wired
Control Method	Touch
Control Type	Dial Control
Controller Type	Hand Control
Customer Reviews	4.4 out of 5 stars 2,385 Reviews
Display Type	Manual
Finish Types	Matte
Global Trade Identification Number	00085267262392
Included Components	Decorative Backplate, Thermostat, User Manual
Item Dimensions D x W x H	0.88"D x 3.12"W x 3.12"H
Item Height	3.12 inches
Item Type Name	Non-Programmable Mechanical Thermostat
Item Weight	2.4 ounces
Manufacturer	Honeywell Home
Manufacturer Warranty Description	1 year.
Material Type	Plastic
Model Name	CT30A1005
Model Number	CT30A1005/N
Mounting Type	Wall Mount
Power Source	Low Voltage Control
Product Dimensions	0.88"D x 3.12"W x 3.12"H
Product Style	Contemporary
Shape	Square
Special Feature	Heat Only
Specific Uses For Product	Furnace
Temperature Control Type	Heating
UPC	085267262392
Unit Count	1.0 Count
Voltage	120 Volts

CT30A1005 Standard Manual Economy Thermostat, Almond, 0.6

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