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LCraft

02:53PM | 08/13/07
Member Since: 06/21/05
2 lifetime posts
Bvhvac
I have an Emerson-Chromalox heater and thermostat. Voltage is 208/240. From what I understand I can use 12-2 wire. I ran the 12-2 wire to thermostat. the thermostat has 2 screws, one for line and one for load. It also has a small white wire. I understand that I mark the white wire with black tape making it a hot wire and hook them together on the top screw (Line), the I would connect another white(marked black) and black wire to the bottom screw which is load and run to the heater. My question is, what do i do with the white wire that is on back of the thermostat? Also the 2 ground wires, do they wirenut together? Thanks, Linda

Billhart

04:08PM | 08/13/07
Member Since: 04/25/05
1918 lifetime posts
Is this a wall thermostate or one that stics on the end of a heater?

" From what I understand I can use 12-2 wire." It depends on what the rating (wattage) is of the heater?

"the thermostat has 2 screws, one for line and one for load. It also has a small white wire. I understand that I mark the white wire with black tape making it a hot wire and hook them together on the top screw (Line), the I would connect another white(marked black) and black wire to the bottom screw which is load and run to the heater."

First of all you should never hook more than one wire to a terminal screw.

It sounds like you have a single pole thermostate and only breaks one side of the line.

I have no idea what the white wire is for. That makes no sense.

What is the brand and model number of the thermostate?

Have you checked for downloadable installation instuctions?

LCraft

05:28PM | 08/13/07
Member Since: 06/21/05
2 lifetime posts
The baseboard heater is an Emerson-Chromalox BB-HI-34-2

Specs are:

Voltage: 208/240

Wattage: 565/750

Amperes: 3.3/3.7

BTUH: 1920/2560

Length: 36

Thermostat is also an Emerson-Chromalox

specs are:

T-300

120-240VAC 22A

The Thermostat has two screws, Top screw says Line, bottom screw says Load and there is also a white wire on the back of the Thermostat.

According to the diagram which isnt very good it looks like the black line go on the top and a red line goes to the white wire ( which is attached to the thermostat) and from there to the heater then it looks like it goes from the heater to the bottom screw or Load on the thermostat. I was told I could use 12-2 so I dont have the red wire. Any suggestions? Thanks

Billhart

03:41AM | 08/14/07
Member Since: 04/25/05
1918 lifetime posts
I could not find anything on Chromalox website.

In fact all of the stuff that they show is for industrial. Also found that Emerson sold Chroalox in 2001.

And, as ou describe it, the thermostat is enough non-standard that I can't make any recommendations of how to hook it up.
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