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Wiring a Dayton Greenhouse Thermostat to control an exhaust fan

Previous greenhouse owner left me with a Dayton Thermostat.  It has three screws where wires can be attached. I read that wires are attached to 2 of the 3 screws depending on whether the thermostat is controlling a heating or cooling device.  I am confused because only 2 wires will be leaving the thermostat. I am use to devices that have 2 white wires & 2 black wires leaving the device.  My guess is that the 2 wires leaving the thermostat are connected to either the white wire or the black wire of the line to open & break the circuit.  The directions on the thermostat itself are written for an electrician & I don't understand them.  For example, on the thermostat itself it says "opens red to blue on increase" ?

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Posted on Mar 26, 2008

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WIRING DIAGRAM FOR A DAYTON EXH. FAN FOR A GREENHOUSE. tHE FAN GOES TO A THERMOSTAT THEN TO ELECTEICAL BOX


So far, I cannot locate a wiring diagram for an installation. However, this is a single phase "shaded pole" motor.

For a single speed, shaded pole motor, there are only two power wires. For a dual speed motor, a third wire provides a second speed. One wire will be one side of the motor coil(s)...connected to the white power wire. The other wires are the opposite side of one or two motor coils, connected to the black power wire or through a thermostat. A thermostat is simply a temperature operated switch. An additional wire may (should) be a green "grounding" wire.

Specification Sheet from Grainger.
http://www.grainger.com/product/DAYTON-Exhaust-Fan-4C361

Installation manual.
ftp://207.99.53.68/array1/pacs/AS-BUILT/D1112-50-GLOBAL-Terminal&Container(15KV_ARC-RES-Swgr_Outdoor)/D1112-50-O&M/D1112-50%20Global/BM%20%23%20549%20Exhaust%20Fan.d20100210-u113426.pdf

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What are the most important things to consider when building a greenhouse?


I would say the two most important issues are ventilation and heating. These are both important for the health of the plant. Still air encourages pathogens and discourages photosynthesis. Heating is necessary to keep the temperature at the plant's optimal level.

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Where can you order flowers & plants like the greenhouses have?


You check out parkseed.com or gurneys.com. Both have the same buy one take one deal so just choose the best one for you. Now for nursery catalog you can refer to wasidegardens.com and others you can find online. I love gardening which brought me to having a greenhouse garden. Although building greenhouses are very expensive the benefits it brings compensates for the expenses. Having your own greenhouse enables you to save grocery expenses. You will have a regular supply of fruits, vegetables and even flowers. And you have the control on planting what you want. You also have a place to relax and meditate.

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My Dayton 4lz94 greenhouse thermostat doesn't activate at the set temp. But will turn on when temp is about 5 degrees below. Set temp. Is there a sensitivity adjustment to calibrate for activatio


I am having the same problem with my Dayton greenhouse thermostat, this question was posted in the wrong section...but if you find a solution I'd like to know. I am having problems with the heating thermostat as well as the cooling one.

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1 Answer

We have a heating/cooling system (Bryant) located outside. The heating unit runs on propane gas. The unit exhausts hot air while running. I assume this is exhaust from the burning gas. I have wondered...


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Likely something fell in there-- and needs to be removed.

When you shut the thermostat down, does the fan stop instantly?

Mack B

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Can the G73 be hooked up to an wall thermostat and allow it to over ride the unit thermostat? I want to install this is in a greenhouse and would like to have the thermostat on the wall down lower and not...


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