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Old 08-08-2019, 08:25 PM   #1
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Default Walk in cooler doors

Hey wiring a 13 door walk in cooler and I’m a little puzzled over the ratings I found on the doors and door frames. Each door says htr .87 amps at 115. It also says htr ctrl 2 amps.
The .87 is obviously the door heaters, but is it possible the control for the .87 heater uses 2 amps? The tech support at Anthony doors said this is a government regulation to make door heaters use less electricity as of 2017, and they didn’t think it could be using that much current. Any one familiar with these?
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Old 08-08-2019, 08:41 PM   #2
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The door has two heating elements at .87 A each?
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Old 08-08-2019, 10:28 PM   #3
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Normally you are going to feed the mullion heaters from the same circuit as the interior lighting the heaters are so small they don't really add much.

But in this case they would need a 20amp circuit of their own.
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Old 08-09-2019, 01:08 AM   #4
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Originally Posted by MechanicalDVR View Post
Normally you are going to feed the mullion heaters from the same circuit as the interior lighting the heaters are so small they don't really add much.

But in this case they would need a 20amp circuit of their own.
This is the issue. One site has panel access still, but the other doesn’t. I only roughed in one 120 v 20 amp circuit with the 208= 50 amp condenser feed.
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Old 08-09-2019, 01:11 AM   #5
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The door has two heating elements at .87 A each?
Each of 13 glass doors has (1) .87 amp heater and a 2 amp “htr ctrl”. Plus each frame has similar.
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Old 08-09-2019, 07:37 AM   #6
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Originally Posted by WPNortheast View Post
This is the issue. One site has panel access still, but the other doesn’t. I only roughed in one 120 v 20 amp circuit with the 208= 50 amp condenser feed.

EVERY walk in I have ever seen has a minimum of two circuits, one for the condenser and evap fans and one for lighting and mullion heaters.


Were you not aware of the 13 doors? That looks like and estimated 13 amps devoid of interior lighting on it's own.
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Old 08-09-2019, 07:38 AM   #7
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Originally Posted by WPNortheast View Post
Each of 13 glass doors has (1) .87 amp heater and a 2 amp “htr ctrl”. Plus each frame has similar.

I think the control can handle 2 amp heaters a thermostat (switch) doesn't draw power on it's own.
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Old 08-09-2019, 02:06 PM   #8
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Wire one up and amp clamp it
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Old 08-09-2019, 02:06 PM   #9
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I think the control can handle 2 amp heaters a thermostat (switch) doesn't draw power on it's own.

This. Sounds like you have 1x 0.87A heater and a control rated for 2A.
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Old 08-09-2019, 08:14 PM   #10
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As it turns out, each door frame uses .87 amps and someone just went nuts with the stickers. The individual doors in the frame dont use any current. So they put stickers on each one so they knew the work order i guess. Very hapoy about this outcome.
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