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HVAC Discussions - Heating, ventilation and air conditioning.
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Posted by Ken on July 14, 2006, 8:44 am
Recently I had my two heating/AC systems replaced with Rheem units.
During the installation I noticed that some Freon escaped during the
charging operation of the new A/C systems. The condenser units are
RAND-24JAZ models, R22, SEER 13 units.
The installation information states the Service Valve is "NOT" back
seated on these units. I have read of some valves (King Valves I
believe), that cut off the input of coolant when the valve is backed
out. When they removed the hoses, they did so rapidly so as to lose a
minimum of Freon. My question is: Is it possible that these units were
made so that escaping Freon cannot be stopped when attaching and
disconnecting the hoses for charging, or was the installer unaware of
how to do it without allowing the escape?
This is not a major problem as I hope the new units serve me well as
the old ones had done, but it is a curiosity. Thanks.
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Posted by Noon-Air on July 14, 2006, 8:50 am
show/hide quoted text
> Recently I had my two heating/AC systems replaced with Rheem units. During
> the installation I noticed that some Freon escaped during the charging
> operation of the new A/C systems. The condenser units are RAND-24JAZ
> models, R22, SEER 13 units.
> The installation information states the Service Valve is "NOT" back seated
> on these units. I have read of some valves (King Valves I believe), that
> cut off the input of coolant when the valve is backed out. When they
> removed the hoses, they did so rapidly so as to lose a minimum of Freon.
> My question is: Is it possible that these units were made so that
> escaping Freon cannot be stopped when attaching and disconnecting the
> hoses for charging, or was the installer unaware of how to do it without
> allowing the escape?
> This is not a major problem as I hope the new units serve me well as the
> old ones had done, but it is a curiosity. Thanks.
THere will aways be a "de-minumus" release when the hoses are removed...even
with the environmentaly friendly "dry break" fittings, you will still get a
minimal release.
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Posted by Ken on July 14, 2006, 5:57 pm
Noon-Air wrote:
show/hide quoted text
>> Recently I had my two heating/AC systems replaced with Rheem units. During
>> the installation I noticed that some Freon escaped during the charging
>> operation of the new A/C systems. The condenser units are RAND-24JAZ
>> models, R22, SEER 13 units.
>> The installation information states the Service Valve is "NOT" back seated
>> on these units. I have read of some valves (King Valves I believe), that
>> cut off the input of coolant when the valve is backed out. When they
>> removed the hoses, they did so rapidly so as to lose a minimum of Freon.
>> My question is: Is it possible that these units were made so that
>> escaping Freon cannot be stopped when attaching and disconnecting the
>> hoses for charging, or was the installer unaware of how to do it without
>> allowing the escape?
>> This is not a major problem as I hope the new units serve me well as the
>> old ones had done, but it is a curiosity. Thanks.
>
> THere will aways be a "de-minumus" release when the hoses are removed...even
> with the environmentaly friendly "dry break" fittings, you will still get a
> minimal release.
>
>
I appreciate your reply, but what I apparently failed to describe
properly was the Freon escaping from the Schrader valve. In my old
system they had a cut off valve that closed access to the system via the
Schrader valve, and when the hoses were released it was only the Freon
from inside the hoses that would escape. My situation was such that
they either failed to cut off this path or there was no way of cutting
it off. Since Rheem makes a reliable unit, I wondered if it was
possible that there was no cut off? Anyone familiar with these units???
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Posted by Noon-Air on July 14, 2006, 6:59 pm
show/hide quoted text
> Noon-Air wrote:
>>> Recently I had my two heating/AC systems replaced with Rheem units.
>>> During the installation I noticed that some Freon escaped during the
>>> charging operation of the new A/C systems. The condenser units are
>>> RAND-24JAZ models, R22, SEER 13 units.
>>> The installation information states the Service Valve is "NOT" back
>>> seated on these units. I have read of some valves (King Valves I
>>> believe), that cut off the input of coolant when the valve is backed
>>> out. When they removed the hoses, they did so rapidly so as to lose a
>>> minimum of Freon. My question is: Is it possible that these units were
>>> made so that escaping Freon cannot be stopped when attaching and
>>> disconnecting the hoses for charging, or was the installer unaware of
>>> how to do it without allowing the escape?
>>> This is not a major problem as I hope the new units serve me well as the
>>> old ones had done, but it is a curiosity. Thanks.
>> THere will aways be a "de-minumus" release when the hoses are
>> removed...even with the environmentaly friendly "dry break" fittings, you
>> will still get a minimal release.
> I appreciate your reply, but what I apparently failed to describe properly
> was the Freon escaping from the Schrader valve. In my old system they had
> a cut off valve that closed access to the system via the Schrader valve,
> and when the hoses were released it was only the Freon from inside the
> hoses that would escape. My situation was such that they either failed to
> cut off this path or there was no way of cutting it off. Since Rheem
> makes a reliable unit, I wondered if it was possible that there was no cut
> off? Anyone familiar with these units???
Nobody uses backseating valves on residential equipment anymore except for
maybe some Bryant stuff. The only thing that keeps the refrigerant in the
system is the schrader and the service port cap.
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Posted by Ken on July 15, 2006, 8:40 am
Noon-Air wrote:
show/hide quoted text
>> Noon-Air wrote:
>>>> Recently I had my two heating/AC systems replaced with Rheem units.
>>>> During the installation I noticed that some Freon escaped during the
>>>> charging operation of the new A/C systems. The condenser units are
>>>> RAND-24JAZ models, R22, SEER 13 units.
>>>> The installation information states the Service Valve is "NOT" back
>>>> seated on these units. I have read of some valves (King Valves I
>>>> believe), that cut off the input of coolant when the valve is backed
>>>> out. When they removed the hoses, they did so rapidly so as to lose a
>>>> minimum of Freon. My question is: Is it possible that these units were
>>>> made so that escaping Freon cannot be stopped when attaching and
>>>> disconnecting the hoses for charging, or was the installer unaware of
>>>> how to do it without allowing the escape?
>>>> This is not a major problem as I hope the new units serve me well as the
>>>> old ones had done, but it is a curiosity. Thanks.
>>> THere will aways be a "de-minumus" release when the hoses are
>>> removed...even with the environmentaly friendly "dry break" fittings, you
>>> will still get a minimal release.
>> I appreciate your reply, but what I apparently failed to describe properly
>> was the Freon escaping from the Schrader valve. In my old system they had
>> a cut off valve that closed access to the system via the Schrader valve,
>> and when the hoses were released it was only the Freon from inside the
>> hoses that would escape. My situation was such that they either failed to
>> cut off this path or there was no way of cutting it off. Since Rheem
>> makes a reliable unit, I wondered if it was possible that there was no cut
>> off? Anyone familiar with these units???
>
> Nobody uses backseating valves on residential equipment anymore except for
> maybe some Bryant stuff. The only thing that keeps the refrigerant in the
> system is the schrader and the service port cap.
>
>
Thanks, that is what I needed to know.
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> the installation I noticed that some Freon escaped during the charging
> operation of the new A/C systems. The condenser units are RAND-24JAZ
> models, R22, SEER 13 units.
> The installation information states the Service Valve is "NOT" back seated
> on these units. I have read of some valves (King Valves I believe), that
> cut off the input of coolant when the valve is backed out. When they
> removed the hoses, they did so rapidly so as to lose a minimum of Freon.
> My question is: Is it possible that these units were made so that
> escaping Freon cannot be stopped when attaching and disconnecting the
> hoses for charging, or was the installer unaware of how to do it without
> allowing the escape?
> This is not a major problem as I hope the new units serve me well as the
> old ones had done, but it is a curiosity. Thanks.