How To Install Wet Dry Filter

Air-conditioning & Estrus Pump Refrigerant Drier / Filter Guide

• Postal service a QUESTION or COMMENT almost the demand for and installation of filter drier canisters on air conditioners & estrus pumps

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Refrigerant filter drier canisters:

This article discusses when, where, how and why refrigerant driers are installed on refrigeration, ac and cooling systems. Our photo at page top shows the typical location of a refrigerant dryer canister at the compressor/condenser component of a split system air-conditioning system.

We likewise provide an ARTICLE Alphabetize for this topic, or you can try the page top or lesser SEARCH BOX as a quick way to observe information you demand.

Installing a Refrigerant Dryer / Filter Unit on the Ac or Heat Pump Refrigerant Line

There are several different types of refrigerant pipage organisation filter-drier canisters, installed on the high-side liquid lien or on the low-side suction line, depending on filter type and awarding.

1. Liquid line refrigerant line filter drier on the compressor outlet side, the high pressure level refrigerant or liquid line
2. Suction line refrigerant filter drier installed on the compressor inlet side, the low pressure refrigerant line
3. Heat pump Bi-Directional refrigerant filter drier, installed on oestrus pump systems are bi-directional, because the refrigerant flow reverses direction depending on whether the unit of measurement is in heating mode or cooling fashion - as we illustrate later on this page.

   Heat pump refrigerant filter-driers are designed using internal check valves to assure that contaminants captured in the filter during the flow of refrigerant during a heating wheel are not relased back into the refrigerant when menses direction reverses during a cooling cycle and vice-versa.

4. Replaceable Cartridge Dual-Purpose refrigerant compressor burnout filters in special models like the Emerson STAS Steel Take Apart Shell filter drier can be installed either on the liquid line or on the suction line.

Our photo shows that a Catch-All™ C-163_S refrigerant dryer and filter has been installed on the loftier pressure refrigerant line leaving the outdoor compressor/condenser unit.

This is where we normally see the loftier force per unit area refrigerant line filter-drier device installed.

Notice that a refrigerant dryer, which removes un-wanted moisture from the refrigeration system, is labeled with the types of refrigerant with which information technology is designed to be used.

One time an air conditioner or heat pump arrangement refrigerant leak has been repaired, it will be necessary to flush the refrigerant pipage system (normally using nitrogen), pull a new vacuum on the organisation, and and so re-charge the organization with the proper type and quantity of refrigerant.

Where subsequent work has been done on a heat pump or air conditioning systems such every bit replacing a burned-out compressor, a suction line filter drier should be installed on the suction line just ahead of the compressor to protect the compressor from contaminants.

Commodity Contents

• REFRIGERANT DRIERS & FILTERS
  • REFRIGERANT FILTER DRYER LOCATIONS
  • REFRIGERANT FILTER DRYER INSTALLED INDOORS
  • REFRIGERANT FILTER DRIER Applications, Installation Details, & Warnings
  • REFRIGERANT FILTER DRYER TYPES & INSTALLATION RULES
  • REFRIGERANT DEBRIS FILTERING
  • COMPRESSOR BURNOUT FILTERS DRYERS
  • LIFE EXPECTANCY of a REFRIGERANT FILTER DRYER
  • REFRIGERANT LINE FILTER DRIER INSTRUCTIONS

Article discussion topics: What is that grey canister you encounter at an air conditioning component: why are driers and filters installed on refrigeration equipment? When is a refrigerant gas drier usually installed;

Where should the refrigerant drier be installed on refrigeration equipment; Special refrigerant drier/filter for apply when a compressor motor has been replaced. Diagnosing a saturated or clay-clogged refrigerant drier canister; How to set air conditioning or refrigerator refrigerant gas leaks

Where is the Refrigerant Drier Located on HVAC Systems?

Carson Dunlop Associates' sketch illustrates where the filter/dryer is near often found at air workout or heat pump equipment: on the liquid refrigerant line, in one or more of these locations:

• outside, near the condenser unit (see sketch at left)
• within near the evaporator coil, ahead of the thermostatic expansion valve or capillary tube
• at both of the above locations, and perchance even on the suction line on a system at which a burnt-out compressor motor has been replaced

Nigh HVACR refrigerant filter-driers are designed to be soldered in place, as is the unit shown at left. Some driers may allow connexion using flare fittings - a connection we consider less secure and more leak prone.

When a refrigeration system is or has been "open" - has been emptied of refrigerant for re-charging, for example, the last repair pace before re-charging the repaired air-conditioning or heat pump system with refrigerant is to install a filter/drier such as shown in our photo at left.

The purpose of a refrigerant drier is to absorb (and thus remove) moisture in the refrigeration arrangement. The furnishings of wet on refrigeration systems are detailed at REFRIGERANT LEAK DETECTION merely in sum we can say that moisture in the system tin can prevent proper performance and can even completely stop the system from working at all, even causing costly impairment.

We as well find a drier installed on refrigeration systems that have been serviced for a refrigeration leak, peculiarly a depression-side piping leak, because of the increased chance that the system has been contaminated by wet and perhaps dirt. In fact if the arrangement was open up and badly contaminated the HVAC technician may install a drier right later the repair and may install a new or second drier on the same system a few months later.

While some technicians ever install a filter/drier on the refrigerant organization, fifty-fifty at original installation, more ofttimes when we run into a refrigerant drier canister on a system (usually at the compressor/condenser unit) nosotros presume that the system has undergone some service or repair equally that's most ofttimes when the device is added.

Refrigerant Drier Filter Installation Positions & Locations on HVACR Equipment

Where is the Drier Ordinarily Located on an Air conditioning, Heat Pump, or other Refrigeration System?

The drier is installed at the coolest location on the system, on the liquid line, outside of the refrigerated space, and ahead of any refrigerant metering devices similar thermostatic expansion valves or capillary tubes.

In our photo (left) you can run into that the drier has been installed outdoors, at the point where the high side liquid refrigerant line is exiting the compressor/condenser unit.

In our photo beneath left you'll meet a filter/drier installed in two locations on the air workout system compressor/condenser.

Refrigerant filter drier canisters may also be installed indoors

Some air conditioner and heat pump installation instructions specify the installation of a liquid-line filter drier indoors (likewise equally or in place of outside at the compressor-condenser unit).

A typical indoor refrigerant filter/drier location is shown in our sketch at left: run into the blue canister with cerise pointer showing refrigerant direction flow in Carrier'due south sketch at left (edited)).

1. Affix 5 in. (127 mm) liquid tube to the indoor scroll.
2. Wrap filter drier with damp cloth.
3. Braze filter drier to to a higher place five in. (127 mm) liquid tube.
4. Flow arrow must point towards indoor ringlet.
5. Connect and braze liquid refrigerant tube to the filter drier.

Watch out:  Unit Damage Take chances Failure to follow this caution may result in equipment damage or improper operation. Installation of filter drier in liquid line is required.

- Source: Carrier[5]

Beneath our photo illustrates the installation of a refrigerant filter/drier at the A-coil - you can come across the horizontal drier canister to the right of (and protecting) the tan-colored Thermostatic Expansion Valve (TEV).

Refrigerant Filter Drier Applications, Installation Details, & Warnings

• A manufactory approved liquid-line filter drier is required on every unit - Always install the mill-supplied liquid-line
  filter drier. If replacing the filter drier, refer to Product Data Assimilate for appropriate part number. Obtain replacement filter driers from
  your distributor or branch. [Carrier installation instructions]
• Match the filter/drier to the operating pressure & properties of the refrigerant gas and equipment on which information technology is to be installed. For example, on HVACR using Puron® R410-A refrigerant, do not apply liquid-line filter driers with rated working pressures less than 600 psig
• Do non leave Puron suction line filter driers in line longer than 72 hours [during initial equipment installation]
• Use the correct type of filter drier for the location at which it is to exist installed. Practise not install a suction-line filter drier in liquid line.
• Do not overheat or impairment the filter drier during installation. For example installation instructions typically call for the filter drier to be wrapped in a wet fabric during brazing of its connections to the refrigerant tubing or piping.
• When air conditioner or heat pump refrigeration system must be opened for service, recover refrigerant, evacuate and so break vacuum with dry out nitrogen and replace filter driers. Evacuate to 500 microns prior to recharging.

Source: PURONR (R--410A) REFRIGERANT QUICK REFERENCE GUIDE-[5]

Bank check the Refrigerant Filter Drier Type & Installation Location / Position

Sentinel out: be sure to bank check the installation instructions for your specific HVAC equipment before installing a filter-drier.

Watch out: Practise not install a suction-line filter drier in liquid line. (Carrier 2022)

And be sure that you are installing the proper type of filter-drier, intended for apply on a suction line or on a liquid refrigerant line.

For example, some newer equipment such as the 24 ANA Infinity™ Series Air Conditioners with Puron® Refrigerant, include instructions that state:

• Do not use liquid--line filter driers with rated working pressures less than 600 psig.
• Practise not leave Puron suction line filter driers in line longer than 72 hours.
• Do not install a suction-line filter drier in the liquid line.
• Wrap all filter driers and service valves with wet cloth when brazing.
• A manufacturing plant approved liquid--line filter drier is required on every unit. [ane]

Refrigerant Line Dryer Filter Flow Management

Refrigerant Debris Filtering Requirements

Our photo illustrates the installation of filter driers on both the liquid refrigerant line and the gas "suction line" at an outdoor compressor-condenser unit.

Watch out: the filter drier types are not identical - the proper filter/drier type must be matched to its location and use on liquid versus gas refrigerant piping.

Refrigerant Driers not only remove moisture, they as well are intended to filter debris from the refrigerant piping system.

Filtering the refrigerant liquid leaving the compressor/condenser protects the Thermal Expansion Valve or capillary tube from clogging. In at to the lowest degree some refrigerant drier/filter models, the presence of the strainer means that the drier/strainer device has to exist installed in a particular direction such that particles of the desiccant do non interruption free and travel through the refrigerant piping organisation.

In our air conditioner compressor / condenser unit photo (left) yous tin can discover that 2 refrigerant filter-driers are installed, one on the depression side and i on the high side. The suggestion is that repair piece of work has been done on this organisation, perhaps a compressor replacement.

Compressor Exhaustion Filter Driers: Why is a filter-dryer disquisitional on an air conditioner or refrigeration arrangement that has been worked-on?

Water anywhere inside the refrigerant handling system (tubing, compressor, condenser, or refrigerant metering cap tube or thermostatic expansion valve) freezes, making the organisation inoperative. The inside of any refrigeration organisation must be pure refrigerant: no air, no dirt, no water, and no mix of various refrigerant gases other than a single gas for which the system is designed.

Watch out: above nosotros mentioned that on a badly contaminated refrigeration organisation the technician may install a new or a second drier a few months later the original repair/service. If a drier has go saturated in the course of doing its job (of removing moisture from the refrigerant system), information technology begins to restrict the menstruation of refrigerant through the arrangement. This refrigerant flow restriction will cause force per unit area changes indicated by a temperature difference on either side of the drier - that's one style you could quickly test for a clogged refrigerant drier.

Watch out: if you change the size of the drier that you have installed on a refrigeration organization that does not use a refrigerant receiver (as is the instance with near residential appliances and air conditioners/heat pumps, you will accept to recoup in the charge used in the system (if it is a "critically-charged" or precise accuse system as we've discussed here). For case if yous install a larger drier than was previously in place you'd need more refrigerant charge in order to assure that the frost line will nonetheless extend to the finish of the evaporator.

Special Exhaustion Filters Used after a Compressor Motor Replacement

A "exhaustion drier" is a special drier installed on the suction line in refrigeration systems when a compressor motor has burned out and the compressor is inverse out. The filter protects the new refrigeration compressor from damage due to debris, particles, moisture, and fifty-fifty inorganic acids that may be in the refrigerant pipe organization after a compressor motor has "burned out".

Merely skilful practice volition install this filter-dryer ahead of the compressor later any major work is done on the ac or heat pump system that involves opening its refrigerant piping system.

In this instance we have to first clean the acrid and lacquer out of the refrigeration system. (Using Karene-R11).

The system is done out and and then the burnout drier is put in temporarily in the low side or "suction side" or return refrigerant line, replaced one or more times as needed, until the system is cleaned. Therefore you might not normally come across a drier in this position on a system except during that repair process.

The burnout filter drier is a special unit of measurement able to remove acids and contaminants that were created when the sometime compressor burned out. These driers also unremarkably provide the power to compare pressures across the device. If the filter/drier is bottleneck and thus causes a reduced pressure level on the suction side, the compression ratio in the compressor increases, compressor efficiency drops, and in extreme cases the equipment could exist damaged.

Watch out: experts warn that the suction line dryer is non only important, but that it must be sized properly to friction match the arrangement's design flow rate of refrigerant.

• If refrigerant flow velocity is too slow (caused an oversized dryer) the return of oil to the compressor may exist hindered and the compressor could be damaged.
• If the refrigerant line dryer is besides modest (under-sized) the consequence is an un-wanted pressure drop on the compressor side of the dryer, causing lower suction pressure, higher pinch ratios, and a less efficient-operating HVACR system. - Whitman et als. (xxxx) p. 501-502

  See REFRIGERANT HIGH Head PRESSURE DIAGNOSIS

More details about what wet and contaminants practise to a refrigeration arrangement are discussed

at REFRIGERANT LEAK DETECTION

What is the Life Expectancy of a Refrigerant Filter Drier Installed on an Air Conditioner or Heat Pump or Fridge/Freezer?

Reader question: what is the life expectancy of a filter dryer canister on refrigeration equipment?

Martin Chan said:

Hi! I was wondering how long is the life expectancy of the dryer filter? One time fixed, how practice we know when to modify a new one ? Are in that location any reasons for changing a drier filter ? Could I run a VRV organisation without the use of a drier filter ? What is the difference between installing a drier filter and not installing, for a VRV system ?

Answer:

Martin I have several different answers to the question of refrigeration arrangement filter-drier life:

A filter drier that is installed every bit good practice or precaution on a healthy HVACR system is left in place oftentimes for many years, even the life of the equipment.

A filter drier that was installed (usually two of them) following replacement of a burned-out compressor is often changed after a year, on the theory that it may have collected a fair amount of grime that ought to exist removed to avert risking blocking refrigerant menses. After that swap out the new filters are left in place indefinitely unless the technician finds a reason to practice otherwise.

After those standard cases, on occasion a refrigerant filter drier MIGHT be removed and replaced if tests on the system showed that information technology is bottleneck.

Ordinarily a drier should final the life of the equipment, given no leaks or problems with the organization that require that the refrigerant piping be cut.

(The pipage will be cut and the system opened, for example, if a cooling curlicue or condensing coil has to be replaced.)

Short term temporary employ refrigerant line filter-driers

Watch out: some filter driers installed on refrigerant piping accept special short-term intended uses such as during new equipment installation or when used every bit a compressor burnout filter drier. E.g. Carrier'due south new equipment installation instructions land

Do not leave Puron suction line filter driers in line longer than 72 hours. [ane]

Refrigerant Line Dryer Installation Instructions

How does a suction line or liquid line refrigerant filter drier piece of work, and what's within these (ordinarily sealed) filter canisters? How does a bi-directional refrigerant filter piece of work on heat pump systems?

Encounter the illustrations and photos given beneath.

Illustration: Emerson ASF Filter-Drier cited & discussed below and as well higher up on this page.

[Click to overstate any image]

• Carrier, Unmarried Stage COMFORT AIR CONDITIONERS INSTALLATION INSTRUCTIONS [PDF] Carrier Corporation, 7310 Westward. Morris St. S Indianapolis, IN 46231 USA

  Includes details about the filter dryer installation requirements for Carrier systems.

  Excerpt: Do not install a suction--line filter drier in liquid line.

• Emerson, ASD SUCTION LINE FILTER-DRIERS Educational activity SHEET [PDF] (2013) Suction Line Filter-Driers: ASF/ASD/SFD/A-TS/ASK, Emerson Electric Co., Website: www.EmersonClimate.com/FlowControls, Tel - Technical Support: 1-866-625-8416, - retrieved 2022/06/eighteen original source: https://climate.emerson.com/documents/suction-line-filter-driers-asf-asd-sfd-a-ts-enquire-instructions-en-3585830.pdf
  Extract:

  Emerson suction line filter-driers contain a protective filter, plus desiccant composite for maximum moisture and acrid removal. Compressor manufacturers recommend the installation of suction line filter-driers to protect their equipment from contaminants left in the system afterwards a burnout.

  These suction line filter-driers include protection from moisture and organic or inorganic acids, resulting from burnouts, or chemical changes in the arrangement refrigerant or oil. They are specially suited for organisation clean-up after a burnout, or when major work has been performed on the organization.

Analogy above: Emerson Alco Controls' ADK liquid line drier illustrating apply of a solid block internal filter, cited below.

• Emerson Alco Controls ADK LIQUID LINE FILTER DRIER TECHNICAL Bulletin [PDF] Alco Controls, Emerson, Op. Cit., - retrieved 2022/06/18 original source: https://climate.emerson.com/documents/adk-filter-driers-technical-bulletin-en-gb-4540766.pdf

  This liquid line filter drier uses a solid block drying material that filters particulates and as well removes moisture. The visitor says that

  The active drying material is in the form of a solid cake. The solid block is a mixture of molecular Sieve and activated Alumina for maximum wet and acid removal capacity ... formed into a solid cake and held together by a synthetic binding material.

Analogy above: Emerson Alco Controls' BFK Bi-Period liquid line refrigerant filter drier used on refrigeration systems whose refrigerant flow direction is bi-directional and reversing, such as on heat pump units. Cited merely beneath.

[Click to overstate whatsoever epitome]

• Emerson Alco Controls BFK LIQUID LINE BI-Period FILTER DRIER for Estrus PUMPS Technical Message [PDF] used on the liquid line in reversible refrigeration systems - refrigerant reverses flow management.

Illustration: Emerson FDB Liquid Line Filter Drier cutaway showing the filter'due south construction, excerpted from the FDB liquid line filter drier bulletin cited just below.

• Emerson FDB LIQUID LINE FILTER DRIER Technical Bulletin, [PDF] Alco Controls, Emerson, Op. Cit., - retrieved 2022/06/xviii original source: https://climate.emerson.com/documents/fdb-filter-drier-technical-bulletin-en-gb-4686690.pdf

  This liquid line filter uses a more than-complex interior construction to combine an upstream-side particle filter with a loose dewdrop filled desiccant stage on the filter's downstream side.

• Emerson STAS Take-APART FILTER-DRIER INSTRUCTIONS [PDF] Emerson Climate Command, Op. Cit., compressor burn-out filter.

  The STS filter can exist taken autonomously to replace an internal filter/drier; the STAS is used on the liquid OR on the suction line in a refrigeration system following a compressor burnout and replacement.

  On the liquid line the STAS Compressor Burn-Out filter is best-installed betwixt the receiver and the wet-liquid indicator, solenoid valve and TEV (expansion valve). On the high side liquid line the filter beat can be mounted in any position but the horizontal position is preferred to make cleaning easier.

  On the suction line the STAS Compressor Fire-Out filter is installed equally close every bit possible to the compressor just "upstream" from any vibration eliminator (if present). On the suction side the filter shell is installed in a vertical or pitched position to permit oil to return to the compressor.

  Spotter out: the company notes that The side connexion of the STAS trounce must always exist the inlet when used on liquid line service to ensure system protection from possible block rupture.

• Imperial Clevite, "Instructions for Kwik-Charge" ™ provided past Imperial Clevite, Inc., Fluid Components Division, 6300 Westward Howard St., Chicago IL 60468 (July 1982 device instructions)
• Robinair® Robinair Manufacturing Corporation, Robinair Style, Montpelier OH 43543-9990 or more currently: OTC/SPX 655 Eisenhower Bulldoze Owatonna, MN 55060 USA Phone (507) 455-7000 Fax (507) 455-8354. Customer service Tel: 800-628-6496. Technical support: 800-822-5561. Website: http://world wide web.robinair.com/

  Robinair provides a wide range of refrigerant charging equipment including gauges, hoses, automatic charging scales, and refrigerant recovery/recycling equipment.

• Robinair® Dial-a-charge charging cylinder description and instructions, Kent-Moore Robinair Manufacturing Corporation, Robinair Fashion, Montpelier OH 43543-9990 or more currently: OTC/SPX 655 Eisenhower Drive Owatonna, MN 55060 USA Telephone (507) 455-7000 Fax (507) 455-8354. Customer service Tel: 800-628-6496. Technical support: 800-822-5561.

  Robinair provides a wide range of refrigerant charging equipment including gauges, hoses, automatic charging scales, and refrigerant recovery/recycling equipment.

• Parker Sporlan REFRIGERANT DRYER INSTALLATION INSTRUCTIONS [PDF] Sporlan Segmentation, Parker Hannifin Corporation 206 Lange Drive, Washington, MO 63090 USA Tel: 636 239 1111 Website: world wide web.sporlan.com retrieved 2022/06/18 original source: https://sporlanonline.com/literature/40/SD-214.pdf

  Installation and servicing instructions for Sporlan'southward replaceable core catch-all filter-drier.
  Excerpt:

  The drier shell may be installed in any position, but always observe the proper menstruation direction. A horizontal position is normally almost convenient, since whatever clay collected on the cores will non drop into the outlet fitting when the cores are removed.

• Parker Sporlan, HOW THE REVERSIBLE Estrus PUMP FILTER-DRIER WORKS [PDF], Op. Cit., retrieved 2022/06/xviii original source: https://www.parker.com/literature/Sporlan/Sporlan pdf files/Sporlan pdf 040/SD-111_CA Rev Heat Pump Install72015.pdf

Reader Comments & Q&A

If your charge or refrigerant is incorrect y'all might be getting too much frost on the evaporator curl - that can block air menstruum and cut cooling.

Thank you for your fast reply. Yesterday I tried it, with a Castel 4308/ii. Long story brusque: I accept a pocket-sized DIY project, modifying a mini-divide to a h2o-cooled condenser type. Former 407c outdoor unit of measurement, without gas. I had found some sometime 407c at habitation, merely it was contaminated with water/moisture.

After charging the system, I heard that ice balls are running and suction force per unit area dropped to vacuum sometimes. Since I don't take more 407c (and don't want to buy for this hobby project), I wanted to clean it. So I put the filter after EXV, vacuum the indoor and tubes. After startup, I heard that ice balls are hitting the filter. suction pressure was going up and downward. after ten-fifteen minutes, noises stopped, the pressure level got constant.

Just at that place was no cooling capacity at the indoor unit of measurement. I removed the filter, connected the tubes, vacuum it. startup: and information technology's working properly! So it'southward possible to use it, simply just temporary until the system is cleaned. Mayhap this could be helpful for others.

Laszlo

I'll need to practice some further inquiry but I don't think it's an issue; after all, it's common to notice a filter-drier installed on both high and low sides of a refrigeration system.

What happens if a filter drier is installed later on EXV? for example to 1/4 line of a separate Air conditioning before the indoor unit.

Paveen,

Because the filter drier is designed to function without causing a pressure drop beyond the filter it should not matter where a properly-selected and sized filter drier is installed. Often afterwards a compressor burnout replacement (for case) the tech will install a filter drier in two locations, as described in the article above.

Sir,can you advice me ..if expansion takes place in outdoor unit..ways cooling scroll starts from there..normally it should be earlier expansion valve.

.but in this case if input information technology in the cooling line ..will information technology result in pressure level driblet/ cooling efficiency..?

Brian said:
Would you lot fellows really install a filter-drier out side of the Ac box?, peculiarly here in Florida?

Look at the photos of my rusted out ane that is But 5 years erstwhile

(mod) said:

Thank used for the excellent comment, Brian. It's clear that the installation details for filter driers should vary depending on climate and other site situations.

Nosotros could non look at your photos as to do and so requires opening an account at the refrigeration engineer photo host.

There your comments included

I take a 5.5 yr old York (Luxaire) unit hooked up to my trailer home hither in St Augustine Fl. I do Non live near the beach. I keep my whole trailer and surrounding belongings very clean and washed down.

"A week agone I lost all refrigerant from my AC unit. At fault was a VERY RUSTY filter/drier that ended upwardly letting all the refrigerant escape. I looked up the manufacturer of this filter-drier (Sporlan) and establish they were a USA company, who had been in this business organisation since the tardily 1940's. They were Non a Chinese visitor that I would have been immediately suspicious of manufacturing such a substandard product.

Accept a look at this filter-drier (some photos fastened), and give me your opinion. My opinion is that this filter-drier was Not properly undercoat painted/prepared prior to the outer paint coating. The water readily got under that outer coating (paint layer) and the rust began from day one. Look at how that outer layer just peels off in layers while still property together as an entity. " - op. cit.

You are welcome to use our page lesser or top CONTACT link to observe our email to send me photos of the weather condition you are describing, and I'll be glad to comment farther.

I add that a review of x Sporlan and other filter-drier installation instruction sets did not notice whatsoever instruction that discusses a required location inside or exterior of the equipment covers or exposed or non exposed to the weather.

Other causes of corrosion on a filter drier might exist exposure to salt spray (sea side installations), deicing salts in some climates and locations, and electric wiring defects.

Watch out: when yous discover unusual corrosion on HVAC equipment it is worth having some electrical grounding system inspection and tests by an experienced electrician: a grounding error can cause accelerated corrosion or other damage to HVACR equipment - AND - improper electrical grounding or neutral wiring is dangerous, risking shock or fire hazards besides.

Should the drier be changed if a new air handler is installed?

what canister?

If you mean the refrigerant filter-drier, yep unremarkably it'southward good practise to leave that component in identify or to install a new one if the system refrigerant piping has been cut open up or a compressor replaced.

My heating and ac person didin't like the look of the canister and said nosotros didn't demand it.

Question / Comment: Failure to install a burnout filter/dryer may take led to early failure of the replacement unit

After a contractor replaced a failed compressor ) that failed via acid exhaustion) he left in the xvi yr old suction line filer,,,he never put in a exhaustion filter at all....the compressor failed in just 13 months they normally last eighteen plus years. I think he should refund the 42,000 he charged me what do y'all remember.

When I asked the contractor to explicate his substandard work he said I can't prove 100% that the dirty gunked up suction line filter acquired the three ane/2 ton Copland compressor to neglect ,,,what a joke. - Tom Morris

Reply:

Tom, nosotros concur with y'all. Practiced practice would have been to install a burnout dryer-filter on the arrangement and perhaps, depending on how dirty the system was from the first burnout, to return and swap in a second filter unit afterward a period of time. The cost to the tech to come back to make that second change is non trivial notwithstanding, and both possessor and tech are tempted to skip it. The risk is clogging of the thermal expansion valve or other parts in the time to come, leading to even so more repairs.

But I wouldn't assume that the prime or only cause of failure of the replacement compressor was just due to the dryer omission. A tech who doesn't know about the importance of all of the steps in replacing a burned out A/C or estrus pump compressor may non have known other important steps to take.

Question: Where does the refrigerant drier/filter go?

Dan,
Regarding installation of a filter/dryer; the filters I have seen on HVAC parts sites are for installation on the suction side. When I installed an AC in my house in '88, I installed a filter/dryer in the liquid line, near the coil as recommended at the time. It seems to me that it makes more sense to filter the liquid entering the TXV than to filter the gas entering the compressor. What am I missing? I purchased the compressor on eBay. It turns out that it was exactly the P/N specified in the parts listing for the equipment. The gaspack contained what I assume was an before equivalent function. - Doug

Answer:

Doug we encounter filter dryers installed at both sides of the compressor. It depends ... if a organisation is thought to be contaminated there are advantages of having a filter at both ends of the compressor motor, and it certainly doesn't hurt.

Question: new condenser installed, does the drier have to be replaced?

(Aug 23, 2022) Susan said:

I had a new condensing unit put in. Does the installer need to come out later on a month and put in a new dryer? Is information technology a suction or line dryer?

Reply:

Susan,

IF the old compressor burned upwardly information technology's practiced practice to change out that filter drier equally you suggest, though often the tech may get out the burnout filter drier in place for a longer interval earlier changing it. It depends on the type of dryer and where it was installed.

Picket out: Exercise non exit Puron suction line filter driers in line longer than 72 hours. [one]

Question: vertical orientation of filter drier?

(Mar 23, 2022) Zamree said:

Installation vertical orientation of liquid line filter drier for vrv/vrf or package compare to horrizontal posiotion - place compressor pressure at starting likewise loading,create amp increase and long run compressor head temperature loftier and some case compressor hands fire out. This may come up to critical if the field pipage >30m, as well many peak(more then 10). Organisation pressure level unstable.

Reply:

Zamree,

I'm so distressing but I don't sympathize your question. Sounds similar you lot need an HVAC refrigeration engineer.

Question: does the external filter dryer lose refrigerant?

(May 12, 2022) Bob Gorman said:

Having installed External filter dryer. will they lose the refrigerant during installation and will have to be replaced?

Reply:

Bob, filter-drier canisters do not lose refrigerant and are replaced as per discussed in the article to a higher place. If the HVACR technician follows good procedure while connecting her exam equipment, gauges, charging cylinder etc. to the system refrigerant is not "lost" in the procedure such that adding refrigerant would exist needed.

Question: annoying whistling sound from Air conditioning at showtime-up and shut down in cooling mode

(June ii, 2022) Dave said:

I have a rheum heat pump installed new in 09 was fine till terminal year. Unit started making a whistle noise only on air-conditioning offset upwardly and shutdown non heat mode. Had 410a accuse checked and about a pound was added. Dissonance was now less but he came dorsum and added a little more 410a --- no change in racket.

And so ran heat pump a few months later and it shutdown on loftier pressure---suspect too much 410a ? Came back and let some out using the gauge set. Runs on heat pump now and air-conditioning but still brand dissonance. Unit of measurement is in a condo / ringlet & or evaporator gas noise surging in line till information technology equalizes ? Very abrasive at night. Did not practice this for the kickoff 3 years any ideas ? He doesn't know what to practice & either practise I.

Reply:

Dave

Take a look at

inspectapedia.com/noise_diagnosis/HVAC_Noise_Descriptions_5.php#Whistle

and allow me know if that helps.

Question: liquid line filter dryer establish on the gas or suction line

(June 9, 2022) Grace said:

What happens if your compressor may demand to be replaced due to liquid line dryer being found in the hot gas line? Tin the compressor be saved? Thanks!

Reply:

Grace:

A Suction Line filter drier is installed to protect the compressor confronting damage and its installation is good exercise. Subsequently a compressor burnout, because at that place is extra take chances of contaminants in the refrigeration pipe system, a special burnout filter dryer, capable of filtering out acids, is installed to protect the new copressor.

If we omit the burnout filter/dryer the risk is that we contaminate, damage, or reduce the life of the new compressor.

At this bespeak of discovery of the error you cite, the correct move is to install the proper filter dryer. If the organization is working normally that's the best we can do, though you might hash out a dealer-supported extended warranty if the installer accepts responsibilty for the original error.

Question: filter dryer installed backwards

half-dozen/17/2014 edmund magras said:

A visitor installed a dry filter backward. It went un-noticed for about a yr before it was replaced should I be concerned
ejmagras@hotmail.com

Answer:

Edmund,

The backwards drier itself won't crusade damage to your organization, but it may non have been filtering properly, leaving a risk of debris-clogging of the refrigerant metering device or other components. If those had clogged you'd know it because the system would not exist working properly

Therefore my OPINION is that if the drier is now installed properly you're ok.

...

Continue reading at REFRIGERANT LEAK DETECTION or select a topic from the closely-related articles below, or see the complete Commodity Alphabetize.

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