* Technically speaking a Thermal Bulb is the probably best terminology for that sensor tube attached to the expansion valve since it is not electrically controlled at the evaporator valve and in a Pantera That expansion valve assembly is also your sized orifice metering tube that makes it cold, but not too cold. This metering valve orifice tube size should be different between R-12 and R-134 systems for best operation. * * * A thermal bulb has a small line filled with C02 is attached to the evaporator tailpipe. If the temperature on the tail pipe raises, the gas will expand and cause pressure against the diaphram. This expansion will then move the seat away from the orifice, allowing an increased refrigerant flow. As the tail pipe temperature drops, the pressure in the thermal bulb also drops, allowing the valve to restrict flow as required by the evaporator. * The pressure of the refrigerant entering the evaporator is fed back to the underside of the diaphragm through the internal equalizing passage. Expansion of the gas in the thermal bulb must overcome the internal balancing pressure before the valve will open to increase refrigerant flow. * Larry @ Pantera Parts Connection From: Forest Goodhart <forestg@att.net> Reply-To: Forest Goodhart <forestg@att.net> Date: Friday, July 15, 2016 at 5:32 PM To: Larry Stock <Larrys@PanteraParts.com>, Jim Gray <grayjim@cox.net>, "detomaso@detomasolist.com" <detomaso@detomasolist.com> Subject: Re: [DeTomaso] A/C deicing switch sensor It is not a thermocouple. It is a gas filled capillary tube. It should be inserted into the case 4". From: Larry Stock <larrys@panteraparts.com> To: Jim Gray <grayjim@cox.net>; detomaso@detomasolist.com Sent: Friday, July 15, 2016 5:22 PM Subject: Re: [DeTomaso] A/C deicing switch sensor Hey Jim, That tube is called a thermocouple. It senses the temperature in the Evaporator to keep it above freezing the coils. It is about 10² long, and should also be packed with a putty substance as far across and as close to the coils as possible for most accurate operation. The coils are back inside quite aways with is why it is as long as it is. Larry @ Pantera Parts Connection On 7/15/16, 2:38 PM, "DeTomaso on behalf of Jim Gray" <detomaso-bounces@server.detomasolist.com on behalf of grayjim@cox.net> wrote:
Reinstalling A/C on-off switch. Approximately how far does the temp sensing tube go into the fan housing? As I remember the excess tubing was in a loose coil near to one of the refrigerant hoses.
Thanks in advance.
Jim Gray
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Reinstalling A/C on-off switch. Approximately how far does the temp sensing tube go into the fan housing? As I remember the excess tubing was in a loose coil near to one of the refrigerant hoses.
Thanks in advance.
Jim Gray
_______________________________________________
Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [12]DeTomaso@server.detomasolist.com [13]http://server.detomasolist.com/mailman/listinfo/detomaso
To manage your subscription (change email address, unsubscribe, etc.) use the links above.
Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the
_______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list DeTomaso@server.detomasolist.com http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. * Technically speaking a Thermal Bulb is the probably best terminology for that sensor tube attached to the expansion valve since it is not electrically controlled at the evaporator valve and in a Pantera That expansion valve assembly is also your sized orifice metering tube that makes it cold, but not too cold. This metering valve orifice tube size should be different between R-12 and R-134 systems for best operation. * * A thermal bulb has a small line filled with C02 is attached to the evaporator tailpipe. If the temperature on the tail pipe raises, the gas will expand and cause pressure against the diaphram. This expansion will then move the seat away from the orifice, allowing an increased refrigerant flow. As the tail pipe temperature drops, the pressure in the thermal bulb also drops, allowing the valve to restrict flow as required by the evaporator. * The pressure of the refrigerant entering the evaporator is fed back to the underside of the diaphragm through the internal equalizing passage. Expansion of the gas in the thermal bulb must overcome the internal balancing pressure before the valve will open to increase refrigerant flow. * Larry @ Pantera Parts Connection From: Forest Goodhart <[1]forestg@att.net> Reply-To: Forest Goodhart <[2]forestg@att.net> Date: Friday, July 15, 2016 at 5:32 PM To: Larry Stock <[3]Larrys@PanteraParts.com>, Jim Gray <[4]grayjim@cox.net>, "[5]detomaso@detomasolist.com" <[6]detomaso@detomasolist.com> Subject: Re: [DeTomaso] A/C deicing switch sensor It is not a thermocouple. It is a gas filled capillary tube. It should be inserted into the case 4". __________________________________________________________________ From: Larry Stock <[7]larrys@panteraparts.com> To: Jim Gray <[8]grayjim@cox.net>; [9]detomaso@detomasolist.com Sent: Friday, July 15, 2016 5:22 PM Subject: Re: [DeTomaso] A/C deicing switch sensor Hey Jim, That tube is called a thermocouple. It senses the temperature in the Evaporator to keep it above freezing the coils. It is about 10(c)-: long, and should also be packed with a putty substance as far across and as close to the coils as possible for most accurate operation. The coils are back inside quite aways with is why it is as long as it is. Larry @ Pantera Parts Connection On 7/15/16, 2:38 PM, "DeTomaso on behalf of Jim Gray" <[10]detomaso-bounces@server.detomasolist.com on behalf of [11]grayjim@cox.net> wrote: list.
They also grant the list owner permission to maintain an archive or approve the archiving of list messages.
_______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list [14]DeTomaso@server.detomasolist.com [15]http://server.detomasolist.com/mailman/listinfo/detomaso To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages. References 1. mailto:forestg@att.net 2. mailto:forestg@att.net 3. mailto:Larrys@PanteraParts.com 4. mailto:grayjim@cox.net 5. mailto:detomaso@detomasolist.com 6. mailto:detomaso@detomasolist.com 7. mailto:larrys@panteraparts.com 8. mailto:grayjim@cox.net 9. mailto:detomaso@detomasolist.com 10. mailto:detomaso-bounces@server.detomasolist.com 11. mailto:grayjim@cox.net 12. mailto:DeTomaso@server.detomasolist.com 13. http://server.detomasolist.com/mailman/listinfo/detomaso 14. mailto:DeTomaso@server.detomasolist.com 15. http://server.detomasolist.com/mailman/listinfo/detomaso