Great video and good memories! The original Carrier TimeGuard that uses that mechanical timer. Good memories when my dad and I was at the local Carrier distributor back in late 70s early 80s with tech support discussing how the circuit works. Back when I was in grade school. Those Carlyle/Carrier Semis are beasts...Still love the way the sound. Thanks for posting!
Some of the older Carrier equipment used a control relay that the thermostat controlled and then the relay controlled the contractor. They even used them on some of the residential split systems. Time for the old equipment to go. I have not seen a system with a control relay in 35 plus years. Good video.
Grate video. When I got started in 1985 those old semi hermetic compressors were the norm. They probably the reason my back is in the condition it’s in. Changing them is not easy
Our church bought an old Catholic School/ Church back in 2000. In the church part was a Hydronic heat and chiller. This system was put in service about 1963. The chiller had 2 of these hermitic 036D 15 ton chillers. The Catholic Brothers had cannibalized parts to keep it running for the last 7 years they were there. It took us about 6 years to get all the kinks out of it and get back up to running. Then the 3 fan slab condenser got hit with lightning and fried it all again. Also continuously had to add R22 to it because the chiller barrel had leak in its. So about 40K later got a whole new outside unit
I worked on some of old beasts years ago and they used high votage contactors and relays. They used a mechanical timer that would start condenser fan first then solenoid pressure switch for compressor with a unloader. Unloader was on untill second stage is called for. 24 volts was for fan relay 2nd stage relay and mechanical timer for compressor circuit. Not many of those old ones still out there.
Most of the old Carrier semi hermetic are pump down systems. The thermostat controls a low voltage liquid line solenoid, opens liquid line to refrigerant, unit is started by the low pressure controller in condenser. If you checked pressures at the condenser, you will think its low as it pumps down before it shuts down by the low pressure controller usually set around 10 psi. So basically the thermostat circuit just operates the liquid line solenoid.
Hey Jeff that one big unit carrier that had an open pressure switch might be worth replacing that pressure switch with the one blueon recommends and converting to r 458 a the one that's not running replace for sure and that one old carrier smaller unit I think could be converted to 458a also if it's not leaking badly without any mods. Or blueon r 458a but I know for sure that one big carrier Comercial unit defentaly replace that's, for sure. But shows how good those old units were to last This long remember those big units are very expensive to replace that's why conversion is often better
Yea I’m giving the customer a couple options. I think with the new, high profile tenant that’s moving, in the building owner might want to get on their good side right away. Now of course sinking 10s of thousands of dollars into a space will take a very long time to recover, it might just be the best option for them. But I’m giving them options and let them make the decision.
@@JeffsHVACAdventures thanks Jeff that one big Comercial unit defenetely needs replacing but on the blueon app if you subscribed has profiled a lot of those older units for converting the small old school carrier might just need shrader valves replaced then charged. With r 458 a the big carrier unit blueon has a list of what switches to replace and components to convert to r 458 a and whether you need to add a adjustable txv. But yes the owner needs to get on the good side of any high profile tenant.
Hey Jeff I've noticed a lot of those focus pros have been taking crap lately in maryland especially on the west coast of the bay. we have had a lot of solar flares and CMEs they're absolutely destroying these thermostats so I'm not surprised I've replaced a lot of them with the new t4s or t5s
Great video and good memories! The original Carrier TimeGuard that uses that mechanical timer. Good memories when my dad and I was at the local Carrier distributor back in late 70s early 80s with tech support discussing how the circuit works. Back when I was in grade school. Those Carlyle/Carrier Semis are beasts...Still love the way the sound. Thanks for posting!
Hell yea! Thanks for watching!
Some of the older Carrier equipment used a control relay that the thermostat controlled and then the relay controlled the contractor. They even used them on some of the residential split systems. Time for the old equipment to go. I have not seen a system with a control relay in 35 plus years. Good video.
Grate video. When I got started in 1985 those old semi hermetic compressors were the norm. They probably the reason my back is in the condition it’s in. Changing them is not easy
lol. Yea said it friend!
Nice find & nice vid ... Thx
Great video. Thank you for sharing
Our church bought an old Catholic School/ Church back in 2000. In the church part was a Hydronic heat and chiller. This system was put in service about 1963.
The chiller had 2 of these hermitic 036D 15 ton chillers. The Catholic Brothers had cannibalized parts to keep it running for the last 7 years they were there. It took us about 6 years to get all the kinks out of it and get back up to running. Then the 3 fan slab condenser got hit with lightning and fried it all again. Also continuously had to add R22 to it because the chiller barrel had leak in its. So about 40K later got a whole new outside unit
Yikes. Yea… sometimes it’s better to just replace right away.
I worked on some of old beasts years ago and they used high votage contactors and relays. They used a mechanical timer that would start condenser fan first then solenoid pressure switch for compressor with a unloader. Unloader was on untill second stage is called for. 24 volts was for fan relay 2nd stage relay and mechanical timer for compressor circuit. Not many of those old ones still out there.
Heck yea man. Oldie but goodie!
Most of the old Carrier semi hermetic are pump down systems. The thermostat controls a low voltage liquid line solenoid, opens liquid line to refrigerant, unit is started by the low pressure controller in condenser. If you checked pressures at the condenser, you will think its low as it pumps down before it shuts down by the low pressure controller usually set around 10 psi. So basically the thermostat circuit just operates the liquid line solenoid.
Great job troubleshooting Jeff hope you all get the change out thanks for the video
Thanks Tom 🤙
Can not beat the old Dinosaur units! May not be energy efficient but them bad boys would cool..
Hey Jeff that one big unit carrier that had an open pressure switch might be worth replacing that pressure switch with the one blueon recommends and converting to r 458 a the one that's not running replace for sure and that one old carrier smaller unit I think could be converted to 458a also if it's not leaking badly without any mods.
Or blueon r 458a but I know for sure that one big carrier Comercial unit defentaly replace that's, for sure.
But shows how good those old units were to last This long remember those big units are very expensive to replace that's why conversion is often better
Why should he “replace it for sure”? Because it has a leak?
@@KentuckyReef we know that but big Comercial units are very expensive to replace.
@@gabrielstern4992 What do we know? Are you saying that he should replace it, because it’s expensive to replace?
Yea I’m giving the customer a couple options. I think with the new, high profile tenant that’s moving, in the building owner might want to get on their good side right away. Now of course sinking 10s of thousands of dollars into a space will take a very long time to recover, it might just be the best option for them. But I’m giving them options and let them make the decision.
@@JeffsHVACAdventures thanks Jeff that one big Comercial unit defenetely needs replacing but on the blueon app if you subscribed has profiled a lot of those older units for converting the small old school carrier might just need shrader valves replaced then charged.
With r 458 a the big carrier unit blueon has a list of what switches to replace and components to convert to r 458 a and whether you need to add a adjustable txv.
But yes the owner needs to get on the good side of any high profile tenant.
Ni😅ce
Hey Jeff I've noticed a lot of those focus pros have been taking crap lately in maryland especially on the west coast of the bay. we have had a lot of solar flares and CMEs they're absolutely destroying these thermostats so I'm not surprised I've replaced a lot of them with the new t4s or t5s
Now that you mention it I have seen an elevation in thermostat replacements. Not just the Focus Pros… a couple different styles. 🤔