Also If your using for a freezer app you can take the normally closed from defrost timer #4 to the common and the no to the compressor contactor coil or relay coil... Same can be used for off cycle I made a video installing one...
I’m using one of these for an outdoor wood boiler. In the directions it shows a jumper wire do I need to do this? My a419 does not have a jumper wire. And is wired just like your diagram. The jumper is between the 120 and LC. All mine will do is kick a fan on to feed the fire once temp is to low.
When wiring a new 120 condenser do I just wire the neutral to it, and have a jumper from l1 on thermostat to LC, and then bring in the hot from nc to condenser relay?
I Do NOT Run Full Compressor amps Ever through these controls. Better to use it as a Control For a Compressor Contactor. Letting the Contactor take the Load is a Longer term solution rather than running full compressor current through these small Relays on the Board. Although they will take the Load for a short While it is not advisable & depending on Amp draw you could burn up the relay real quick junking out the Control. Compressors draw 6-7 times Running amps at start up far Exceeding Rated amps of relays in this control. Unless it’s Just a little 1/6hp R-290 unit that only draws 2 amps while running.
So if I want to wire a 240 VAC strip heater, would I connect the two HOT Lines (L1, L2) to terminal block 1 (TB1) at terminals: LN (Line neutral) and 240V? Then would I connect the two SWITCHED power leads (L1,L2) to TB2; for example L1 at LC (Line Common - or Line voltage SPDT) and L2 at LNC (Line Normally Closed)? Then just connect the two ground wires with a wire nut from wall power cord to supply cord to heater. The Johnson Controls or PENN A421 manual is very confusing as it shows a jumper wire (both for 120v and 240v) that would supply constant unswitched voltage (hot always connected) on one side of 240 volt power (example L1 always connected)???? I can't wrap my head around this concept. The Figure 4 title says: Wiring the A421 Series Controls using the same power source to power the control operation and power the controlled equipment. how is this possible given the jumper. the controlled equipment would be hot on one side of 240v always.
I spoke to Tech Support at PENN Control. The A421 will not switch both L1 and L2 on 240v. It only switches one (single pole). To completely operate 240v (cut both 120 v sides), an additional relay would need to be added.
@@googleuser3714 Then why would the put in a connection for 240 Volt if you end up using a relay with its own 120 Volt coil ? Something is not adding up here ! What is it ? Poor engineering ?
Freezer - #4 & one side of Liquid line solenoid coil. other side of solenoid coil to N.( for 230 volt coil ) Walk in cooler - if changing from existing analog control to A421. Common - to LC = Load Common. NO - to LNO = Load Normally open.
Did u watch the whole video ? This video is about installing this digital to replace an existing analog control. In this case - this is the correct way to wire in when pulling out a analog. I State specifically in this video they are just a set of contacts. Nothing more.
@@craighvac1808 What I’m saying is if thier is an existing analog control on the wall you just take the two wires that were going to the existing control and put them in the c & no positions. Period. The existing analog control is just a set of dry contacts just like this is correct ?
Thank u for uploading this video really appreciated and it helped me! Keep uploading good stuff like that ,
Your Welcome !
Also If your using for a freezer app you can take the normally closed from defrost timer #4 to the common and the no to the compressor contactor coil or relay coil... Same can be used for off cycle I made a video installing one...
I’ll check your vid out. 👍
Looked for your video. Does not seem to be there. I searched a421 on your channell and digital temperature control. Nothing found.
@@OcRefrig it's titled true gdm 72f if you look at the list I think it's the most recent one I published
Good Job Oc, can you put up the settings and the defrost would like to see how you set it up the programing end of the A421. Thanks
I don’t use the ones with defrost. so , it might be a while.
the next one I buy. I’ll get one with defrost.
I’m using one of these for an outdoor wood boiler. In the directions it shows a jumper wire do I need to do this? My a419 does not have a jumper wire. And is wired just like your diagram. The jumper is between the 120 and LC. All mine will do is kick a fan on to feed the fire once temp is to low.
no jumper needed.
When wiring a new 120 condenser do I just wire the neutral to it, and have a jumper from l1 on thermostat to LC, and then bring in the hot from nc to condenser relay?
I Do NOT Run Full Compressor amps Ever through these controls. Better to use it as a Control For a Compressor Contactor. Letting the Contactor take the Load is a Longer term solution rather than running full compressor current through these small Relays on the Board. Although they will take the Load for a short While it is not advisable & depending on Amp draw you could burn up the relay real quick junking out the Control. Compressors draw 6-7 times Running amps at start up far Exceeding Rated amps of relays in this control. Unless it’s Just a little 1/6hp R-290 unit that only draws 2 amps while running.
Thank you very much that’s great help
Your Welcome ! 😎
Thanks. Can you do one on adding a paragon or grasslin defrost clock
So if I want to wire a 240 VAC strip heater, would I connect the two HOT Lines (L1, L2) to terminal block 1 (TB1) at terminals: LN (Line neutral) and 240V? Then would I connect the two SWITCHED power leads (L1,L2) to TB2; for example L1 at LC (Line Common - or Line voltage SPDT) and L2 at LNC (Line Normally Closed)? Then just connect the two ground wires with a wire nut from wall power cord to supply cord to heater.
The Johnson Controls or PENN A421 manual is very confusing as it shows a jumper wire (both for 120v and 240v) that would supply constant unswitched voltage (hot always connected) on one side of 240 volt power (example L1 always connected)???? I can't wrap my head around this concept.
The Figure 4 title says: Wiring the A421 Series Controls using the same power source to power the control operation and power the controlled equipment. how is this possible given the jumper. the controlled equipment would be hot on one side of 240v always.
I spoke to Tech Support at PENN Control. The A421 will not switch both L1 and L2 on 240v. It only switches one (single pole). To completely operate 240v (cut both 120 v sides), an additional relay would need to be added.
@@googleuser3714 Then why would the put in a connection for 240 Volt if you end up using a relay with its own 120 Volt coil ? Something is not adding up here ! What is it ? Poor engineering ?
Thanks for the how to
👍
Nice job OC 👍👍👍
Thanks Harry ! 😎🏝👍
Where the two wires from common and NO will be connected.?
Freezer - #4 & one side of Liquid line solenoid coil. other side of solenoid coil to N.( for 230 volt coil )
Walk in cooler - if changing from existing analog control to A421.
Common - to LC = Load Common.
NO - to LNO = Load Normally open.
I’m trying to use this with a heated vat in a shop that runs off 220 how do I wire it
Nice video! Could you do one one a time clock?
What kind of clock ? Defrost clock ?
m.th-cam.com/video/T3Ybaso2s2c/w-d-xo.html
Go to about 07:00 on the defrost clock video.
Good one Oc 👍
Thanks Greg ! 😎 🏝
You left out that you need to apply control circuit voltage to the common terminal, they are dry contacts
Did u watch the whole video ?
This video is about installing this digital to replace an existing analog control. In this case - this is the correct way to wire in when pulling out a analog.
I State specifically in this video they are just a set of contacts. Nothing more.
Nobody NEEDS TO ALLWAYS APPLY VOLTAGE. it Depends on what You are using it for. I NEVER use this control that way. I Just use it as a Switch.
@@OcRefrig what do you mean? Are you saying there is no voltage on c and n.o when you wire this up in place of an analog control?
@@craighvac1808 What I’m saying is if thier is an existing analog control on the wall you just take the two wires that were going to the existing control and put them in the c & no positions. Period. The existing analog control is just a set of dry contacts just like this is correct ?
There's no such thing as a 240 Volt line You only get 240 V when you use two 120 Volt leads ! This is a stupid control !
Very confusing