How To Install A Liquid Line Filter Drier

Air Workout & Oestrus Pump Refrigerant Drier / Filter Guide

• POST a QUESTION or Comment about the need 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, air conditioning 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 arrangement air conditioning organization.

Nosotros also provide an ARTICLE Alphabetize for this topic, or you tin endeavour the page top or bottom SEARCH BOX as a quick way to notice information you need.

Installing a Refrigerant Dryer / Filter Unit on the Air Conditioning or Rut Pump Refrigerant Line

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

1. Liquid line refrigerant line filter drier on the compressor outlet side, the high force per unit area 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 heat pump systems are bi-directional, considering the refrigerant flow reverses direction depending on whether the unit is in heating manner or cooling style - as we illustrate afterwards on this page.

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

4. Replaceable Cartridge Dual-Purpose refrigerant compressor burnout filters in special models similar 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.

Once an air conditioner or rut pump system refrigerant leak has been repaired, it volition be necessary to affluent the refrigerant pipe system (usually using nitrogen), pull a new vacuum on the system, and then re-charge the system with the proper type and quantity of refrigerant.

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

Article 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 Exhaustion FILTERS DRYERS
  • LIFE EXPECTANCY of a REFRIGERANT FILTER DRYER
  • REFRIGERANT LINE FILTER DRIER INSTRUCTIONS

Article discussion topics: What is that grey canister you see 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 exist installed on refrigeration equipment; Special refrigerant drier/filter for use when a compressor motor has been replaced. Diagnosing a saturated or dirt-clogged refrigerant drier canister; How to fix 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 most ofttimes found at ac 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)
• inside near the evaporator gyre, ahead of the thermostatic expansion valve or capillary tube
• at both of the above locations, and peradventure 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 let connectedness using flare fittings - a connection we consider less secure and more leak prone.

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

The purpose of a refrigerant drier is to absorb (and thus remove) moisture in the refrigeration system. The effects of moisture on refrigeration systems are detailed at REFRIGERANT LEAK DETECTION merely in sum nosotros can say that moisture in the system can foreclose proper operation and tin even completely finish the arrangement from working at all, even causing costly damage.

Nosotros also find a drier installed on refrigeration systems that have been serviced for a refrigeration leak, especially a low-side piping leak, because of the increased chance that the system has been contaminated past wet and perhaps dirt. In fact if the organization was open up and badly contaminated the HVAC technician may install a drier right after the repair and may install a new or 2nd drier on the aforementioned system a few months subsequently.

While some technicians always install a filter/drier on the refrigerant system, even at original installation, more than often when nosotros encounter a refrigerant drier canister on a arrangement (usually at the compressor/condenser unit) nosotros assume that the system has undergone some service or repair every bit that's well-nigh ofttimes when the device is added.

Refrigerant Drier Filter Installation Positions & Locations on HVACR Equipment

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

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

In our photo (left) yous can meet 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 below left yous'll run across a filter/drier installed in 2 locations on the air conditioning 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 (too equally or in place of exterior at the compressor-condenser unit of measurement).

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

1. Braze 5 in. (127 mm) liquid tube to the indoor coil.
2. Wrap filter drier with clammy cloth.
3. Braze filter drier to above 5 in. (127 mm) liquid tube.
4. Flow arrow must point towards indoor coil.
5. Connect and braze liquid refrigerant tube to the filter drier.

Lookout out:  Unit DAMAGE Hazard Failure to follow this caution may effect in equipment harm or improper operation. Installation of filter drier in liquid line is required.

- Source: Carrier[v]

Below our photo illustrates the installation of a refrigerant filter/drier at the A-whorl - you can see 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 factory approved liquid-line filter drier is required on every unit - Always install the manufactory-supplied liquid-line
  filter drier. If replacing the filter drier, refer to Product Information Digest for appropriate role number. Obtain replacement filter driers from
  your distributor or branch. [Carrier installation instructions]
• Match the filter/drier to the operating pressure & backdrop of the refrigerant gas and equipment on which it is to exist installed. For example, on HVACR using Puron® R410-A refrigerant, practice not use liquid-line filter driers with rated working pressures less than 600 psig
• Do not leave Puron suction line filter driers in line longer than 72 hours [during initial equipment installation]
• Employ the correct type of filter drier for the location at which it is to exist installed. Do non install a suction-line filter drier in liquid line.
• Do not overheat or impairment the filter drier during installation. For example installation instructions typically telephone call for the filter drier to be wrapped in a wet cloth during brazing of its connections to the refrigerant tubing or piping.
• When air conditioner or heat pump refrigeration arrangement must be opened for service, recover refrigerant, evacuate then intermission vacuum with dry nitrogen and supersede filter driers. Evacuate to 500 microns prior to recharging.

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

Check the Refrigerant Filter Drier Type & Installation Location / Position

Lookout out: exist sure to cheque the installation instructions for your specific HVAC equipment before installing a filter-drier.

Watch out: Do 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™ Serial Air Conditioners with Puron® Refrigerant, include instructions that state:

• Exercise not use liquid--line filter driers with rated working pressures less than 600 psig.
• Do not go out Puron suction line filter driers in line longer than 72 hours.
• Practice not install a suction-line filter drier in the liquid line.
• Wrap all filter driers and service valves with wet textile when brazing.
• A mill canonical liquid--line filter drier is required on every unit of measurement. [one]

Refrigerant Line Dryer Filter Period Direction

Refrigerant Droppings 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 of measurement.

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

Refrigerant Driers not only remove moisture, they besides are intended to filter droppings 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 least some refrigerant drier/filter models, the presence of the strainer ways that the drier/strainer device has to be installed in a detail management such that particles of the desiccant do not break free and travel through the refrigerant pipe system.

In our air conditioner compressor / condenser unit photo (left) you tin can find that two refrigerant filter-driers are installed, one on the low side and one on the loftier side. The suggestion is that repair work has been washed on this organization, possibly a compressor replacement.

Compressor Exhaustion Filter Driers: Why is a filter-dryer critical on an air conditioner or refrigeration system 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 system inoperative. The inside of any refrigeration system 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 we mentioned that on a badly contaminated refrigeration arrangement the technician may install a new or a 2nd drier a few months subsequently the original repair/service. If a drier has get saturated in the form of doing its job (of removing moisture from the refrigerant arrangement), it begins to restrict the flow of refrigerant through the organisation. This refrigerant flow restriction will cause force per unit area changes indicated by a temperature divergence on either side of the drier - that'southward one way you could quickly test for a clogged refrigerant drier.

Lookout out: if you alter the size of the drier that you have installed on a refrigeration arrangement that does not employ a refrigerant receiver (as is the case with most residential appliances and air conditioners/estrus pumps, you will take to compensate in the accuse used in the arrangement (if it is a "critically-charged" or precise charge system as we've discussed here). For example if yous install a larger drier than was previously in place you'd demand more than refrigerant accuse in gild to assure that the frost line will still extend to the end of the evaporator.

Special Burnout 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 changed out. The filter protects the new refrigeration compressor from harm due to debris, particles, wet, and even inorganic acids that may be in the refrigerant piping system after a compressor motor has "burned out".

But practiced practice will install this filter-dryer ahead of the compressor afterwards whatsoever major work is done on the air-conditioning or estrus pump system that involves opening its refrigerant pipage organization.

In this instance we have to offset clean the acid and lacquer out of the refrigeration organization. (Using Karene-R11).

The system is washed out and then the burnout drier is put in temporarily in the low side or "suction side" or return refrigerant line, replaced 1 or more times equally needed, until the system is cleaned. Therefore you lot might non unremarkably run into a drier in this position on a system except during that repair process.

The exhaustion filter drier is a special unit able to remove acids and contaminants that were created when the one-time compressor burned out. These driers also usually provide the ability to compare pressures across the device. If the filter/drier is clogging and thus causes a reduced pressure on the suction side, the pinch ratio in the compressor increases, compressor efficiency drops, and in extreme cases the equipment could be damaged.

Scout out: experts warn that the suction line dryer is not just important, but that it must be sized properly to match the organization's design catamenia rate of refrigerant.

• If refrigerant flow velocity is too dull (caused an oversized dryer) the render of oil to the compressor may exist hindered and the compressor could be damaged.
• If the refrigerant line dryer is too minor (nether-sized) the result is an un-wanted force per unit area drop on the compressor side of the dryer, causing lower suction pressure level, higher compression ratios, and a less efficient-operating HVACR arrangement. - Whitman et als. (xxxx) p. 501-502

  See REFRIGERANT HIGH Head PRESSURE DIAGNOSIS

More details well-nigh what moisture and contaminants do 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 Refrigerator/Freezer?

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

Martin Chan said:

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

Answer:

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

A filter drier that is installed as proficient do or precaution on a healthy HVACR organization is left in place often for many years, even the life of the equipment.

A filter drier that was installed (usually two of them) post-obit replacement of a burned-out compressor is often changed afterward a year, on the theory that it may have nerveless a fair amount of crud that ought to be removed to avoid risking blocking refrigerant flow. After that swap out the new filters are left in identify indefinitely unless the technician finds a reason to practise otherwise.

After those standard cases, on occasion a refrigerant filter drier MIGHT be removed and replaced if tests on the organization showed that it is clogging.

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

(The piping volition be cut and the organization opened, for instance, if a cooling curlicue or condensing coil has to exist replaced.)

Short term temporary use refrigerant line filter-driers

Spotter out: some filter driers installed on refrigerant piping have special brusque-term intended uses such as during new equipment installation or when used as a compressor exhaustion filter drier. E.m. Carrier's new equipment installation instructions state

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

Refrigerant Line Dryer Installation Instructions

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

See the illustrations and photos given below.

Illustration: Emerson ASF Filter-Drier cited & discussed below and also above on this folio.

[Click to enlarge whatever image]

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

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

  Excerpt: Do non install a suction--line filter drier in liquid line.

• Emerson, ASD SUCTION LINE FILTER-DRIERS Instruction SHEET [PDF] (2013) Suction Line Filter-Driers: ASF/ASD/SFD/A-TS/Ask, Emerson Electric Co., Website: world wide web.EmersonClimate.com/FlowControls, Tel - Technical Back up: i-866-625-8416, - retrieved 2022/06/18 original source: https://climate.emerson.com/documents/suction-line-filter-driers-asf-asd-sfd-a-ts-ask-instructions-en-3585830.pdf
  Excerpt:

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

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

Illustration above: Emerson Alco Controls' ADK liquid line drier illustrating use of a solid cake 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 cake drying material that filters particulates and likewise removes moisture. The visitor says that

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

Illustration above: Emerson Alco Controls' BFK Bi-Flow liquid line refrigerant filter drier used on refrigeration systems whose refrigerant flow direction is bi-directional and reversing, such every bit on oestrus pump units. Cited just below.

[Click to enlarge any image]

• Emerson Alco Controls BFK LIQUID LINE BI-Flow FILTER DRIER for Rut PUMPS Technical Bulletin [PDF] used on the liquid line in reversible refrigeration systems - refrigerant reverses flow direction.

Analogy: Emerson FDB Liquid Line Filter Drier cutaway showing the filter'due south construction, excerpted from the FDB liquid line filter drier message 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-message-en-gb-4686690.pdf

  This liquid line filter uses a more-complex interior structure to combine an upstream-side particle filter with a loose bead filled desiccant phase on the filter's downstream side.

• Emerson STAS TAKE-Apart FILTER-DRIER INSTRUCTIONS [PDF] Emerson Climate Control, Op. Cit., compressor burn-out filter.

  The STS filter can be taken apart 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 between the receiver and the moisture-liquid indicator, solenoid valve and TEV (expansion valve). On the high side liquid line the filter shell can exist mounted in any position but the horizontal position is preferred to make cleaning easier.

  On the suction line the STAS Compressor Burn-Out filter is installed as close as possible to the compressor just "upstream" from whatever vibration eliminator (if nowadays). On the suction side the filter beat out is installed in a vertical or pitched position to permit oil to render to the compressor.

  Lookout man out: the company notes that The side connection of the STAS shell must always be the inlet when used on liquid line service to ensure arrangement protection from possible cake rupture.

• Imperial Clevite, "Instructions for Kwik-Charge" ™ provided by Royal Clevite, Inc., Fluid Components Division, 6300 West Howard St., Chicago IL 60468 (July 1982 device instructions)
• Robinair® Robinair Manufacturing Corporation, Robinair Way, Montpelier OH 43543-9990 or more currently: OTC/SPX 655 Eisenhower Drive Owatonna, MN 55060 The states Phone (507) 455-7000 Fax (507) 455-8354. Customer service Tel: 800-628-6496. Technical back up: 800-822-5561. Website: http://www.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 Way, Montpelier OH 43543-9990 or more currently: OTC/SPX 655 Eisenhower Drive Owatonna, MN 55060 United states of america Phone (507) 455-7000 Fax (507) 455-8354. Customer service Tel: 800-628-6496. Technical support: 800-822-5561.

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

• Parker Sporlan REFRIGERANT DRYER INSTALLATION INSTRUCTIONS [PDF] Sporlan Division, Parker Hannifin Corporation 206 Lange Drive, Washington, MO 63090 United states of america Tel: 636 239 1111 Website: www.sporlan.com retrieved 2022/06/xviii original source: https://sporlanonline.com/literature/40/SD-214.pdf

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

  The drier trounce may be installed in whatever position, only always observe the proper flow direction. A horizontal position is usually most convenient, since any dirt nerveless on the cores will not drop into the outlet fitting when the cores are removed.

• Parker Sporlan, HOW THE REVERSIBLE HEAT PUMP FILTER-DRIER WORKS [PDF], Op. Cit., retrieved 2022/06/18 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 wrong y'all might be getting too much frost on the evaporator coil - that can cake air flow and cut cooling.

Cheers for your fast reply. Yesterday I tried it, with a Castel 4308/2. Long story brusk: I take a pocket-size DIY project, modifying a mini-split to a water-cooled condenser type. Old 407c outdoor unit of measurement, without gas. I had found some one-time 407c at home, just it was contaminated with water/moisture.

After charging the system, I heard that water ice assurance are running and suction force per unit area dropped to vacuum sometimes. Since I don't have more 407c (and don't want to buy for this hobby projection), I wanted to clean it. So I put the filter later on EXV, vacuum the indoor and tubes. After startup, I heard that ice assurance are hitting the filter. suction force per unit area was going upwards and down. subsequently 10-15 minutes, noises stopped, the pressure level got constant.

Just there was no cooling capacity at the indoor unit. I removed the filter, continued the tubes, vacuum information technology. startup: and information technology's working properly! So it's possible to use it, but just temporary until the system is cleaned. Maybe this could exist helpful for others.

Laszlo

I'll need to do some further research but I don't think information technology'southward an issue; subsequently all, it's common to find a filter-drier installed on both loftier and low sides of a refrigeration arrangement.

What happens if a filter drier is installed subsequently EXV? for example to 1/4 line of a split Ac before the indoor unit of measurement.

Paveen,

Because the filter drier is designed to part without causing a pressure drop across the filter it should not affair where a properly-selected and sized filter drier is installed. Ofttimes afterward a compressor burnout replacement (for example) the tech volition install a filter drier in two locations, every bit described in the article to a higher place.

Sir,can yous advice me ..if expansion takes identify in outdoor unit of measurement..means cooling ringlet starts from in that location..normally it should be before expansion valve.

.but in this example if input it in the cooling line ..will it effect in pressure driblet/ cooling efficiency..?

Brian said:
Would you fellows actually install a filter-drier out side of the Air conditioning box?, peculiarly hither in Florida?

Look at the photos of my rusted out 1 that is ONLY v years old

(modern) said:

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

We could not look at your photos as to do so requires opening an account at the refrigeration engineer photo host.

There your comments included

I have a 5.5 year old York (Luxaire) unit of measurement hooked up to my trailer home here in St Augustine Fl. I exercise Non alive nigh the beach. I keep my whole trailer and surrounding property very clean and washed down.

"A week ago I lost all refrigerant from my AC unit. At fault was a VERY RUSTY filter/drier that concluded up letting all the refrigerant escape. I looked upwards the manufacturer of this filter-drier (Sporlan) and found they were a The states visitor, who had been in this concern since the late 1940's. They were NOT a Chinese company that I would accept been immediately suspicious of manufacturing such a substandard product.

Take a look at this filter-drier (some photos attached), and requite 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. Expect at how that outer layer just peels off in layers while all the same holding together equally an entity. " - op. cit.

You are welcome to apply our page lesser or height CONTACT link to find our e-mail to send me photos of the conditions you are describing, and I'll be glad to comment further.

I add that a review of 10 Sporlan and other filter-drier installation instruction sets did not find any pedagogy that discusses a required location inside or outside of the equipment covers or exposed or not exposed to the conditions.

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

Lookout man out: when you find unusual corrosion on HVAC equipment it is worth having some electrical grounding system inspection and tests by an experienced electrician: a grounding error can crusade accelerated corrosion or other impairment to HVACR equipment - AND - improper electrical grounding or neutral wiring is dangerous, risking shock or burn down hazards too.

Should the drier exist inverse if a new air handler is installed?

what canister?

If you mean the refrigerant filter-drier, yes normally it'south good do to leave that component in place or to install a new ane if the arrangement refrigerant pipe has been cut open or a compressor replaced.

My heating and air conditioning person didin't like the look of the canister and said we didn't need it.

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

After a contractor replaced a failed compressor ) that failed via acid exhaustion) he left in the 16 year sometime suction line filer,,,he never put in a burnout filter at all....the compressor failed in merely 13 months they normally concluding 18 plus years. I think he should refund the 42,000 he charged me what do you call up.

When I asked the contractor to explain his substandard work he said I can't prove 100% that the dirty gunked upward suction line filter caused the 3 i/2 ton Copland compressor to neglect ,,,what a joke. - Tom Morris

Reply:

Tom, nosotros agree with yous. 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 showtime burnout, to return and bandy in a second filter unit of measurement after a catamenia of fourth dimension. The price to the tech to come back to make that second modify is not trivial all the same, and both owner and tech are tempted to skip it. The risk is clogging of the thermal expansion valve or other parts in the future, leading to still more repairs.

Simply I wouldn't presume that the prime or but cause of failure of the replacement compressor was just due to the dryer omission. A tech who doesn't know virtually the importance of all of the steps in replacing a burned out A/C or oestrus pump compressor may not 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. Information technology seems to me that it makes more sense to filter the liquid entering the TXV than to filter the gas inbound the compressor. What am I missing? I purchased the compressor on eBay. Information technology turns out that it was exactly the P/N specified in the parts list for the equipment. The gaspack contained what I assume was an earlier equivalent part. - Doug

Reply:

Doug we see filter dryers installed at both sides of the compressor. It depends ... if a system is thought to exist 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 of measurement put in. Does the installer need to come out after a month and put in a new dryer? Is it a suction or line dryer?

Reply:

Susan,

IF the old compressor burned up it's good do to change out that filter drier every bit you suggest, though oftentimes the tech may leave the burnout filter drier in place for a longer interval before irresolute it. It depends on the type of dryer and where it was installed.

Watch out: Practise not get out Puron suction line filter driers in line longer than 72 hours. [ane]

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 too loading,create amp increase and long run compressor caput temperature high and some case compressor easily burn down out. This may come to critical if the field pipage >30m, as well many elevation(more so x). System pressure unstable.

Reply:

Zamree,

I'm and then lamentable but I don't understand your question. Sounds like you 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 exist replaced?

Respond:

Bob, filter-drier canisters do not lose refrigerant and are replaced as per discussed in the commodity above. If the HVACR technician follows good process while connecting her test equipment, gauges, charging cylinder etc. to the system refrigerant is not "lost" in the procedure such that adding refrigerant would be needed.

Question: annoying whistling sound from AC at start-up and close downward in cooling style

(June ii, 2022) Dave said:

I have a rheum heat pump installed new in 09 was fine till terminal twelvemonth. Unit started making a whistle dissonance only on ac start up and shutdown not rut mode. Had 410a charge checked and about a pound was added. Racket was at present less merely he came back and added a piffling more 410a --- no change in noise.

So ran heat pump a few months later and it shutdown on high pressure---suspect too much 410a ? Came back and let some out using the estimate set. Runs on heat pump now and air-conditioning but still brand noise. Unit is in a condo / coil & or evaporator gas noise surging in line till it equalizes ? Very annoying at dark. Did not practise this for the commencement 3 years any ideas ? He doesn't know what to do & either exercise I.

Reply:

Dave

Take a await at

inspectapedia.com/noise_diagnosis/HVAC_Noise_Descriptions_5.php#Whistle

and permit me know if that helps.

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

(June ix, 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? Can the compressor be saved? Cheers!

Answer:

Grace:

A Suction Line filter drier is installed to protect the compressor confronting damage and its installation is good practice. After a compressor exhaustion, considering there is extra adventure of contaminants in the refrigeration pipe organisation, 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 hazard is that we contaminate, impairment, or reduce the life of the new compressor.

At this bespeak of discovery of the fault you cite, the right motility is to install the proper filter dryer. If the system is working normally that's the best nosotros can do, though you might discuss a dealer-supported extended warranty if the installer accepts responsibilty for the original error.

Question: filter dryer installed backwards

6/17/2014 edmund magras said:

A company installed a dry filter astern. It went united nations-noticed for about a year before it was replaced should I be concerned
ejmagras@hotmail.com

Reply:

Edmund,

The backwards drier itself won't crusade damage to your system, simply 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 be working properly

Therefore my Stance is that if the drier is at present installed properly you're ok.

...

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REFRIGERANT DRIERS & FILTERS at InspectApedia.com - online encyclopedia of building & ecology inspection, testing, diagnosis, repair, & trouble prevention advice.

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