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Posted by Stormin Mormon on October 14, 2008, 8:44 am
I'm thinking some kind of blockage in the liquid line. What you're
describing, there is some kind of block after the compressor, but before the
two valves (one of which you installed). I've seen some condensing units use
a filter drier inside the unit. Which would be after the compressor but
before the service valve for the high side. It's very possible that the
internal filter drier is blocked some how.
--
Christopher A. Young
Learn more about Jesus
www.lds.org
.
On Mon, 13 Oct 2008 20:05:53 -0400, "Stormin Mormon"
>You're not telling us what was happening on the high side. What were the
>pressures? Did it run up to 400 before the safety valve started to recirc?
Maybe I wasn't clear.
This is what happens when the condenser is off both high and low
pressures are at 150 lbs. When the contactor pulls in the high side
stays about the same 150 lbs or it may drop slightly 4 or 5 lbs. This
is what is strange. Normally it takes about one or two minutes for the
pressure to increase to the point that the bypass opens in the
compressor. But the compressor starts bypassing 2 - 3 seconds after
start up. The suction side drops about 25 -30 lbs before the
compressor starts bypassing. When this first happened I thought the
liquid line valve was stuck even though I opened with my Allen key. To
check this I installed a piercing valve on the liquid line on the
compressor side of the back seating valve thinking the pressure would
be much higher if the valve was stuck. After connecting my gauges to
the new port I found the pressure was the same. BTW if I leave for a
day and let the unit sit it still bypasses on the first try the next
day in 2-3 seconds.
Thanks, Vance
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Posted by on October 14, 2008, 12:00 pm
On Tue, 14 Oct 2008 00:11:39 -0700, vance500@bak.rr.com wrote:
>On Mon, 13 Oct 2008 20:05:53 -0400, "Stormin Mormon"
>>You're not telling us what was happening on the high side. What were the
>>pressures? Did it run up to 400 before the safety valve started to recirc?
>Maybe I wasn't clear.
No, you were clear. Stormy is murky in his mind, is all.
>This is what happens when the condenser is off both high and low
>pressures are at 150 lbs. When the contactor pulls in the high side
>stays about the same 150 lbs or it may drop slightly 4 or 5 lbs. This
>is what is strange. Normally it takes about one or two minutes for the
>pressure to increase to the point that the bypass opens in the
>compressor. But the compressor starts bypassing 2 - 3 seconds after
>start up. The suction side drops about 25 -30 lbs before the
>compressor starts bypassing. When this first happened I thought the
>liquid line valve was stuck even though I opened with my Allen key. To
>check this I installed a piercing valve on the liquid line on the
>compressor side of the back seating valve thinking the pressure would
>be much higher if the valve was stuck. After connecting my gauges to
>the new port I found the pressure was the same. BTW if I leave for a
>day and let the unit sit it still bypasses on the first try the next
>day in 2-3 seconds.
>Thanks, Vance
--
Click here every day to feed an animal that needs you today !!!
www.theanimalrescuesite.com/
Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo online at www.pmilligan.net/palm/
Free 'People finder' program now at www.pmilligan.net/finder.htm
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Posted by on October 14, 2008, 12:02 pm
On Tue, 14 Oct 2008 00:11:39 -0700, vance500@bak.rr.com wrote:
>On Mon, 13 Oct 2008 20:05:53 -0400, "Stormin Mormon"
>>You're not telling us what was happening on the high side. What were the
>>pressures? Did it run up to 400 before the safety valve started to recirc?
>Maybe I wasn't clear.
>This is what happens when the condenser is off both high and low
>pressures are at 150 lbs. When the contactor pulls in the high side
>stays about the same 150 lbs or it may drop slightly 4 or 5 lbs. This
>is what is strange. Normally it takes about one or two minutes for the
>pressure to increase to the point that the bypass opens in the
>compressor. But the compressor starts bypassing 2 - 3 seconds after
>start up. The suction side drops about 25 -30 lbs before the
>compressor starts bypassing. When this first happened I thought the
>liquid line valve was stuck even though I opened with my Allen key. To
>check this I installed a piercing valve on the liquid line on the
>compressor side of the back seating valve thinking the pressure would
>be much higher if the valve was stuck. After connecting my gauges to
>the new port I found the pressure was the same. BTW if I leave for a
>day and let the unit sit it still bypasses on the first try the next
>day in 2-3 seconds.
>Thanks, Vance
Something is closed. maybe your service valve failed to open.
2 refer circuits in the beast - you ARE on the right service parts and
lines, and you DID pipe it up to the right evap, RIGHT ?????
--
Click here every day to feed an animal that needs you today !!!
www.theanimalrescuesite.com/
Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo online at www.pmilligan.net/palm/
Free 'People finder' program now at www.pmilligan.net/finder.htm
|
|
Posted by Zyp on October 14, 2008, 8:58 pm
.p.jm@see_my_sig_for_address.com wrote:
> On Tue, 14 Oct 2008 00:11:39 -0700, vance500@bak.rr.com wrote:
>> On Mon, 13 Oct 2008 20:05:53 -0400, "Stormin Mormon"
>>> You're not telling us what was happening on the high side. What
>>> were the pressures? Did it run up to 400 before the safety valve
>>> started to recirc?
>> Maybe I wasn't clear.
>> This is what happens when the condenser is off both high and low
>> pressures are at 150 lbs. When the contactor pulls in the high side
>> stays about the same 150 lbs or it may drop slightly 4 or 5 lbs. This
>> is what is strange. Normally it takes about one or two minutes for
>> the pressure to increase to the point that the bypass opens in the
>> compressor. But the compressor starts bypassing 2 - 3 seconds after
>> start up. The suction side drops about 25 -30 lbs before the
>> compressor starts bypassing. When this first happened I thought the
>> liquid line valve was stuck even though I opened with my Allen key.
>> To check this I installed a piercing valve on the liquid line on the
>> compressor side of the back seating valve thinking the pressure would
>> be much higher if the valve was stuck. After connecting my gauges to
>> the new port I found the pressure was the same. BTW if I leave for a
>> day and let the unit sit it still bypasses on the first try the next
>> day in 2-3 seconds.
>> Thanks, Vance
> Something is closed. maybe your service valve failed to open.
> 2 refer circuits in the beast - you ARE on the right service parts and
> lines, and you DID pipe it up to the right evap, RIGHT ?????
> --
> Click here every day to feed an animal that needs you today !!!
> www.theanimalrescuesite.com/
> Paul ( pjm @ pobox . com ) - remove spaces to email me
> 'Some days, it's just not worth chewing through the restraints.'
> 'With sufficient thrust, pigs fly just fine.'
> HVAC/R program for Palm PDA's
> Free demo online at www.pmilligan.net/palm/
> Free 'People finder' program now at www.pmilligan.net/finder.htm
I'm thinking Paul's closer to the truth. Are you sure you've piped to the
correct liquid line valve from condenser coil [if you stubbed the 2 - ton,
and choose the wrong liquid line - thinking it's a dual circuited condenser
coil - you may have goofed.] Disconnect everything after you've recovered
your refrigerant, and check with nitrogen purge.
--
Zyp
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Posted by on October 14, 2008, 9:14 pm
>.p.jm@see_my_sig_for_address.com wrote:
>> On Tue, 14 Oct 2008 00:11:39 -0700, vance500@bak.rr.com wrote:
>>> On Mon, 13 Oct 2008 20:05:53 -0400, "Stormin Mormon"
>>>> You're not telling us what was happening on the high side. What
>>>> were the pressures? Did it run up to 400 before the safety valve
>>>> started to recirc?
>>> Maybe I wasn't clear.
>>> This is what happens when the condenser is off both high and low
>>> pressures are at 150 lbs. When the contactor pulls in the high side
>>> stays about the same 150 lbs or it may drop slightly 4 or 5 lbs. This
>>> is what is strange. Normally it takes about one or two minutes for
>>> the pressure to increase to the point that the bypass opens in the
>>> compressor. But the compressor starts bypassing 2 - 3 seconds after
>>> start up. The suction side drops about 25 -30 lbs before the
>>> compressor starts bypassing. When this first happened I thought the
>>> liquid line valve was stuck even though I opened with my Allen key.
>>> To check this I installed a piercing valve on the liquid line on the
>>> compressor side of the back seating valve thinking the pressure would
>>> be much higher if the valve was stuck. After connecting my gauges to
>>> the new port I found the pressure was the same. BTW if I leave for a
>>> day and let the unit sit it still bypasses on the first try the next
>>> day in 2-3 seconds.
>>> Thanks, Vance
>> Something is closed. maybe your service valve failed to open.
>> 2 refer circuits in the beast - you ARE on the right service parts and
>> lines, and you DID pipe it up to the right evap, RIGHT ?????
>> --
>> Click here every day to feed an animal that needs you today !!!
>> www.theanimalrescuesite.com/
>> Paul ( pjm @ pobox . com ) - remove spaces to email me
>> 'Some days, it's just not worth chewing through the restraints.'
>> 'With sufficient thrust, pigs fly just fine.'
>> HVAC/R program for Palm PDA's
>> Free demo online at www.pmilligan.net/palm/
>> Free 'People finder' program now at www.pmilligan.net/finder.htm
>I'm thinking Paul's closer to the truth. Are you sure you've piped to the
>correct liquid line valve from condenser coil [if you stubbed the 2 - ton,
>and choose the wrong liquid line - thinking it's a dual circuited condenser
>coil - you may have goofed.] Disconnect everything after you've recovered
>your refrigerant, and check with nitrogen purge.
Also crack all service ports 1/2 way, see if anything changes.
I'm thinking one may be closed. Maybe it's some oddball that seats
opposite of what you're used to.
--
Click here every day to feed an animal that needs you today !!!
www.theanimalrescuesite.com/
Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo online at www.pmilligan.net/palm/
Free 'People finder' program now at www.pmilligan.net/finder.htm
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>pressures? Did it run up to 400 before the safety valve started to recirc?