Search: Posts Made By: HVAC RETIRED
Showing results 1 to 25 of 200
Search took 0.03 seconds.
05-30-18, 12:01 PM
Replies: 2
Views: 379
Posted By HVAC RETIRED

You can buy a low cost humidity gauge most...

You can buy a low cost humidity gauge most anywhere; every home needs one, get one...!
If it feels humid it should be condensing moisture; there is probably a problem that needs addressing.
05-30-18, 11:43 AM
Replies: 7
Views: 539
Posted By HVAC RETIRED

A lot of things can cause low airflow. What...

A lot of things can cause low airflow.
What tonnage is the A/C?
Larger tonnage tend to have poor airflow due to improper design...
04-29-18, 07:26 AM
Replies: 6
Views: 659
Posted By HVAC RETIRED

It looks like a pleated filter installed...

It looks like a pleated filter installed backward.
What size is the filter?
What size is the A/C & furnace?
04-17-18, 10:43 AM
Replies: 5
Views: 538
Posted By HVAC RETIRED

Right Sizing Filter Racks

Not only are Return-Air ducts grossly undersized but also filter rack areas are also grossly undersized…

This is Extremely Important when Sizing filter rack areas…! Time to start checking filter...
04-09-18, 06:24 PM
Replies: 10
Views: 777
Posted By HVAC RETIRED

He did not install a large enough Return-Air flex...

He did not install a large enough Return-Air flex duct, it needs a 20" Flex duct at .05 friction Rate (FR) for 1348-CFM, need at least 1200-CFM.

A 14" flex duct at .05 FR only flows 525-CFM at...
04-08-18, 10:07 AM
Replies: 6
Views: 659
Posted By HVAC RETIRED

Is it air noise or blower noise? If air...

Is it air noise or blower noise?

If air noise, it needs a larger return air filter grille & don't use 1" deep pleated filters. ..!
03-11-18, 09:57 AM
Replies: 10
Views: 777
Posted By HVAC RETIRED

What type & size return-air filter are you using?...

What type & size return-air filter are you using?
Most filter's are too small & of the wrong type causing very low airflow due to excessive fpm velocities...

I need Techs to check new clean RA...
02-23-18, 11:44 AM
Replies: 3
Views: 827
Posted By HVAC RETIRED

The entire duct system also has to be sized...

The entire duct system also has to be sized properly along with the furnace air-handler for the A/C cooling mode...!
02-23-18, 08:15 AM
Replies: 51
Views: 3,394
Posted By HVAC RETIRED

Could also be a bad contactor, or bad wiring...

Could also be a bad contactor, or bad wiring dropping voltage to the capacitors & the compressor. .
Call a contractor & have them troubleshoot all the circuits.
02-19-18, 10:48 AM
Replies: 3
Views: 993
Posted By HVAC RETIRED

Return Air-filters

Prior post was on target; check the duct pressures!

Most systems don't have enough airflow & neetd low pressure drop filters.
I like the Purolator P-312; order on the Internet.

If your...
08-07-17, 06:48 PM
Replies: 16
Views: 1,008
Posted By HVAC RETIRED

The TXV problems have been mostly eliminated. I...

The TXV problems have been mostly eliminated. I would want a R-410A TXV of the proper tonnage. No pistons for me...
07-30-17, 10:08 AM
Replies: 7
Views: 434
Posted By HVAC RETIRED

If you didn't do the measuring; the tip of the...

If you didn't do the measuring; the tip of the fan should usually be just barely below the shroud orifice...
07-30-17, 10:01 AM
Replies: 7
Views: 434
Posted By HVAC RETIRED

Proper positioning of the fan blade

Measure the distance from the blade to the condenser's grille & set the replacement at that same distance. This will position it properly with the shroud orifice...
07-24-17, 08:26 AM
Replies: 7
Views: 627
Posted By HVAC RETIRED

Refrigerant Leak Service - Part of PM Service

It is shameful how customer's are getting such poor service, that is causing them unneeded costs.

Locating leaks & repairing them should be a key part of their HVAC services without excessive...
07-17-17, 08:13 AM
Replies: 4
Views: 506
Posted By HVAC RETIRED

Why not addressing the problem of very low...

Why not addressing the problem of very low airflow can lead to the destruction of the condenser’s compressor and lead to ultra high dollar costs to the customer. This is a huge problem in our...
07-15-17, 05:42 AM
Replies: 12
Views: 638
Posted By HVAC RETIRED

How to Optimize the Supply Air CFM Volume to &...

How to Optimize the Supply Air CFM Volume to & from the Rooms for balancing airflow to all upstairs rooms; in cooling mode, the Return-Air should also all come from upstairs.

You always want the...
07-14-17, 08:54 AM
Replies: 15
Views: 580
Posted By HVAC RETIRED

The average A/C unit according to national...

The average A/C unit according to national testing is only 59% efficient...!
Everything needs to be checked, plus actual Btu/hr delivered to the rooms.

Check the 'indoor' humidity level & the...
07-10-17, 02:45 PM
Replies: 11
Views: 779
Posted By HVAC RETIRED

What was the indoor humidity level? That can be a...

What was the indoor humidity level? That can be a major factor regarding the indoor load & the resultant pressures.

This is a little tricky however, if a piston sticks & does not close down &...
07-10-17, 01:57 PM
Replies: 26
Views: 1,693
Posted By HVAC RETIRED

You went from a 2-Ton to a 3-Ton, the duct system...

You went from a 2-Ton to a 3-Ton, the duct system may not even have adequately supported a 2-Ton system. Low airflow destroys Btu/hr performance.

The contractors that have checked a 1.5-ton...
07-03-17, 08:09 AM
Replies: 10
Views: 647
Posted By HVAC RETIRED

Dealing with Low Airflow - Optimizing the Supply Air CFM Volume to the Rooms

You always want the highest static pressure on the supply side at the diffusers to the rooms, while at the same time reducing as much ‘resistance’ or pressure drops in the rest of the supply side as...
07-02-17, 04:57 PM
Replies: 5
Views: 649
Posted By HVAC RETIRED

Take the model number of the compressor to a...

Take the model number of the compressor to a Supply House; they can look up the cap info...also it may be listed somewhere on the compressor.
07-02-17, 04:44 PM
Replies: 10
Views: 647
Posted By HVAC RETIRED

In situations where you have high humidity...

In situations where you have high humidity problems the new high SEER units with smaller capacity compressors too often can't pull the evaporator pressure & Temp down enough to lower the indoor...
05-05-17, 03:30 PM
Replies: 12
Views: 835
Posted By HVAC RETIRED

In MA U shouldn't even need 3-Ton of cooling for...

In MA U shouldn't even need 3-Ton of cooling for 1500-sf.
Use this Free load-calc & sizing.
HVAC Load Calculation - Maunualj - Whole House Loadcalc (http://www.loadcalc.net/)
04-29-17, 05:39 PM
Replies: 5
Views: 3,484
Posted By HVAC RETIRED

a 3 or 3.5-Ton unit may be batter sized. Do...

a 3 or 3.5-Ton unit may be batter sized.

Do a Free online load-calc:
HVAC Load Calculation - Maunualj - Whole House Loadcalc (http://www.loadcalc.net/)
03-07-17, 09:42 AM
Replies: 6
Views: 694
Posted By HVAC RETIRED

If thinking of installing A/C, U need to do a...

If thinking of installing A/C, U need to do a load-calc & Sizing...
The ductwork was probably sized for heating & might be too small when cooling is added.
HVAC Load Calculation - Maunualj - Whole...
Showing results 1 to 25 of 200
 


 
Forum Jump