heat pump cooling insufficient

Posted by jpl7105 on June 16, 2009, 12:41 pm

I have a two-year old Lennox XP13 with a CBX32M blower coil set up in the
down flow mode. I have two problems:
1) Insufficient cooling (air temp at the register yesterday was 73.6 deg
with 74% humidity, o/s air temp about 88 deg.) A Lennox tech said the air
temp at the register should be about 58-62 deg. BTW, on a 93 deg day the
inside air temps will climb to about 83-84 deg.

2) During operation, I noticed condensation dripping on the blower housing
and wiring. Any ideas? Thanks.
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Posted by Zyp on June 16, 2009, 5:41 pm

jpl7105 wrote:

> I have a two-year old Lennox XP13 with a CBX32M blower coil set up in
> the down flow mode. I have two problems:
> 1) Insufficient cooling (air temp at the register yesterday was 73.6
> deg with 74% humidity, o/s air temp about 88 deg.) A Lennox tech said
> the air temp at the register should be about 58-62 deg. BTW, on a 93
> deg day the inside air temps will climb to about 83-84 deg.
> 2) During operation, I noticed condensation dripping on the blower
> housing and wiring. Any ideas? Thanks.
> --------------------------------
> ##-----------------------------------------------##
> Delivered via http://www.thestuccocompany.com/
> Building Construction and Maintenance Forum
> Web and RSS access to your favorite newsgroup -
> alt.hvac - 28632 messages and counting!
> ##-----------------------------------------------##

Sure;

Low refrigerant charge causing the coil to ice. You should expect
approximately 18 - 22 deg differential from the indoor air temperature to
supply temperature. If it's less than this, you need to have your
neighborhood licensed, bonded, insured and trained HVACR technician stop by
and check the charge, airflow, and insure the return duct is attached and
sealed.

Good luck

Zep

--
Zyp

Posted by Noon-Air on June 16, 2009, 6:30 pm

What Zyp said.... along with could be... too many registers closed, and/or
dirty filter and/or your using the 3M super allergen filters without the
system being designed for high airflow restriction filters.

> jpl7105 wrote:

>> I have a two-year old Lennox XP13 with a CBX32M blower coil set up in
>> the down flow mode. I have two problems:
>> 1) Insufficient cooling (air temp at the register yesterday was 73.6
>> deg with 74% humidity, o/s air temp about 88 deg.) A Lennox tech said
>> the air temp at the register should be about 58-62 deg. BTW, on a 93
>> deg day the inside air temps will climb to about 83-84 deg.
>> 2) During operation, I noticed condensation dripping on the blower
>> housing and wiring. Any ideas? Thanks.
>> --------------------------------
>> ##-----------------------------------------------##
>> Delivered via http://www.thestuccocompany.com/
>> Building Construction and Maintenance Forum
>> Web and RSS access to your favorite newsgroup -
>> alt.hvac - 28632 messages and counting!
>> ##-----------------------------------------------##

> Sure;
> Low refrigerant charge causing the coil to ice. You should expect
> approximately 18 - 22 deg differential from the indoor air temperature to
> supply temperature. If it's less than this, you need to have your
> neighborhood licensed, bonded, insured and trained HVACR technician stop
> by and check the charge, airflow, and insure the return duct is attached
> and sealed.
> Good luck
> Zep
> --
> Zyp
>

Posted by Stormin Mormon on June 16, 2009, 9:45 pm

That, or a dozen other possible problems. How do I
inefficiently cool thee? Let me count the ways.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
.

What Zyp said.... along with could be... too many registers
closed, and/or
dirty filter and/or your using the 3M super allergen filters
without the
system being designed for high airflow restriction filters.

Posted by Bubba on June 17, 2009, 5:57 pm

On Tue, 16 Jun 2009 21:45:11 -0400, "Stormin Mormon"

>That, or a dozen other possible problems. How do I
>inefficiently cool thee? Let me count the ways.

Christopher A. Young
Learn more about Jesus
www.lds.org
.

and for those of you who havent figured it out by now.....
The above statement is Stormys way of saying,
"Gee folks. I really dont have the slightest clue on what his problem
is. Maybe if I ask my boss he will know because I wouldnt even know
how to tie my shoelaces unless my mommy tells me how.
Bubba

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