Delfield 18RC62R Service Manual

F18 SERIES

Service and Installation Manual

Please read this manual completely before attempting to install or operate this equipment! Notify carrier of damage! Inspect all components immediately.

Refrigerated Work Tables, Salad Tables & Freezer Bases

Important Information

Read Before Use

Please Save These Instructions!

July 2013

F18 Series Service and Installation Manual

Important Warning And Safety Information

WARNING Read This Manual Thoroughly Before Operating, Installing, Or Performing Maintenance On The Equipment.

WARNING Failure To Follow Instructions In This Manual Can Cause Property Damage, Injury Or Death.

WARNING Do Not Store Or Use Gasoline Or Other Flammable Vapors Or Liquids In The Vicinity Of This Or Any Other

Appliance.

WARNING Unless All Cover And Access Panels Are In Place And Properly Secured, Do Not Operate This Equipment.

WARNING This Appliance Is Not Intended For Use By Persons Who Lack Experience Or Knowledge, Unless They Have

Been Given Supervision Or Instruction Concerning Use Of The Appliance By A Person Responsible For Their Safety.

WARNING This Appliance Is Not To Be Played With.

WARNING Do Not Clean With Water Jet.

WARNING Do Not Use Electrical Appliances Inside The Food Storage Compartment Of This Appliance.

CAUTION Observe the following:

• Minimum clearances must be maintained from all walls and combustible materials.

• Keep the equipment area free and clear of combustible material.

• Allow adequate clearance for air openings.

• Operate equipment only on the type of electricity indicated on the specification plate.

• Unplug the unit before making any repairs.

• Retain this manual for future reference.

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delﬁeld.com

Contents

Receiving & Inspecting .........................................................3

Serial Number Location ........................................................4

Warranty Information ............................................................4

Regulatory Certifications .......................................................4

Specifications .................................................................... 5-7

Installation ............................................................................8

Operation ..............................................................................9

Temperature Settings ..........................................................10

Maintenance .................................................................. 11-12

Wiring Diagrams ........................................................... 13-16

Replacement Part Lists ................................................. 17-20

Replacement Part Assemblies ...................................... 21-24

F18 Series Service and Installation Manual

Standard Labor Guidelines ..................................................25

Notes ............................................................................ 26-27

Receiving and Inspecting the Equipment

Even though most equipment is shipped crated, care should be taken during unloading so the equipment is not damaged while being moved into the building.

1. Visually inspect the exterior of the package an skid or container. Any damage should be noted and reported to the delivering carrier immediately.

2. If damaged, open and inspect the contents with the carrier.

3. In the event that the exterior is not damaged, yet upon opening, there is concealed damage to the equipment notify the carrier. Notification should be made verbally as well as in written form.

4. Request an inspection of the concealed equipment. This should be done within 10 days from receipt of the equipment.

5. Check the lower portion of the unit to be sure legs or casters are not bent.

6. Also open the compressor compartment housing and

7. Freight carriers can supply the necessary forms upon

8. Retain all crating material until an inspection has been

Uncrating the Equipment

First cut and remove the banding from around the crate. Remove the front of the crate material, use of some tools will be required. If the unit is on legs remove the top of the crate as well and lift the unit off the skid. If the unit is on casters it can be "rolled" off the skid.

visually inspect the refrigeration package. Be sure lines are secure and base is still intact.

request.

made or waived.

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delﬁeld.com

F18 Series Service and Installation Manual

Serial Number Location

The serial number on all self-contained F18 Series refrigerated work tables and freezer bases is located on the electrical specifications tag affixed inside the compressor section next to the pressure control.

On remote refrigerated bases with doors, the tag is inside the unit on the coil side. On remote refrigerated bases with drawers, the tag is affixed to the drawer divider. On remote freezer bases, the tag is located on the inside back of the unit.

Always have the serial number of your unit available when calling for parts or service. A complete list of authorized Delfield parts depots is available at www.delfield.com.

Warranty Information

Visit http://www.delfield.com/minisite/service/warranty_info to:

• Register your product for warranty.

• Verify warranty information.

• View and download a copy of your warranty.

Regulatory Certifications

Models are certiﬁed by:

National Sanitation Foundation (NSF)

Underwriters Laboratories (UL) Underwriters Laboratories of Canada (ULC)

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delﬁeld.com

F18 Series Service and Installation Manual

Specifications

Remote Refrigerated Work Tables

Model # Of Doors

F18WR31 (1) 19” 70 7.56 2.56 115/60/1 3.0 383 120/3°

F18WR39 (1) 27” 124 10.23 3.95 115/60/1 3.0 465 120/4°

F18WR44 (2) 19” 70 12.14 5.12 115/60/1 3.0 605 120/5°

F18WR52 (1) 19” & (1) 27” 70/124 15.12 6.51 115/60/1 3.0 686 120/6°

F18WR60 (2) 27” 124 18.10 7.90 115/60/1 3.0 768 120/6°

F18WR70 (2) 32” 140 21.23 9.64 115/60/1 3.0 869 120/7°

F18WR79 (2) 27” & (1) 19” 124/70 24.48 10.29 115/60/1 6.0 1050 240/4°

F18WR87 (3) 27” 124 27.46 11.85 115/60/1 6.0 1131 240/5°

Shelf Max Load (lbs)

Self-Contained Refrigerated Work Tables

Model # Of Doors

F18WC39 (1) 19” 70 7.56 2.56 115/60/1 8.0 383 1462 16 1/5 5-15P

F18WC47 (1) 27” 124 10.23 3.95 115/60/1 8.0 465 1462 16 1/5 5-15P

F18WC52 (2) 19” 70 12.14 5.12 115/60/1 8.0 605 1462 16 1/5 5-15P

F18WC60 (1) 19” & (1) 27” 70/124 15.12 6.51 115/60/1 8.0 686 1462 16 1/5 5-15P

F18WC68 (2) 27” 124 18.10 7.90 115/60/1 10.0 768 1462 16 1/4 5-15P

F18WC78 (2) 32” 140 21.23 9.64 115/60/1 10.0 869 1994 16 1/4 5-15P

F18WC87 (2) 27” & (1) 19” 124/70 24.48 10.29 115/60/1 10.0 1050 2261 16 1/4 5-15P

F18WC95 (3) 27” 124 27.46 11.85 115/60/1 10.0 1131 2261 16 1/4 5-15P

Shelf Max Load (lbs)

Base Volume

Shelf

Area FT

Shelf

Area FT

Volts/Hertz/

Phase Amps BTU Load EVAP. BTU/°TD

Volts/Hertz/

Phase Amps BTU Load BTU System Cap.

R-404A

oz. H.P.

NEMA

Plug

Remote Refrigerated Mega Top Salad Tables

Model # Of Doors

F18MR31A (1) 19” 70 4.14 6 115/60/1 3.0 280/265 120/2°/12/22°

F18MR44A (2) 19” 70 7.15 6 115/60/1 3.0 444/265 120/4°/12/22°

F18MR44D (2) 19” 70 7.15 12 115/60/1 3.0 444/529 120/4°/22/25°

F18MR52A (1) 19” & (1) 27” 70/124 8.97 6 115/60/1 3.0 515/265 120/4°/12/22°

F18MR52D (1) 19” & (1) 27” 70/124 8.97 12 115/60/1 3.0 515/529 120/4°/22/25°

F18MR52E (1) 19” & (1) 27” 70/124 8.97 18 115/60/1 3.0 515/794 120/4°/31/26°

Shelf Max Load (lbs)

Base Volume

# of Pans

Volts/Hertz/

Phase Amps

BTU Load Base/Rail

EVAP. BTU/°TD

Base/Rail

Self-Contained Refrigerated Mega Top Salad Tables

Model # Of Doors

F18MC39A (1) 19” 70 4.14 6 115/60/1 10.0 280/265 1903/925 16 1/4 5-15P

F18MC39D (1) 19” 70 4.14 12 115/60/1 10.0 280/529 1903/1156 16 1/4 5-15P

F18MC52A (2) 19” 70 7.15 6 115/60/1 10.0 444/265 1903/925 16 1/4 5-15P

F18MC52D (2) 19” 70 7.15 12 115/60/1 10.0 444/529 1903/1156 16 1/4 5-15P

F18MC52E (2) 19” 70 7.15 18 115/60/1 10.0 444/794 1903/1321 16 1/4 5-15P

F18MC60A (1) 19” & (1) 27” 70/124 8.97 6 115/60/1 10.0 515/265 2314/864 16 1/4 5-15P

F18MC60D (1) 19” & (1) 27” 70/124 8.97 12 115/60/1 10.0 515/529 2314/1141 16 1/4 5-15P

F18MC60E (1) 19” & (1) 27” 70/124 8.97 18 115/60/1 10.0 515/794 2314/1361 16 1/4 5-15P

F18MC60F (1) 19” & (1) 27” 70/124 8.97 24 115/60/1

Shelf Max Load (lbs)

Base Volume

# of Pans

Volts/Hertz/

Phase Amps

BTU Load Base/Rail

10.0 515/1058 2314/1540 16 1/4 5-15P

BTU System Cap.

Base/Rail

R-404A

oz. H.P.

NEMA

Plug

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delﬁeld.com

F18 Series Service and Installation Manual

Specifications

Remote Refrigerated Salad Top Tables

Model # Of Doors

F18SR31A (1) 19” 70 4.14 6 115/60/1 3.0 280/265 120/2°/13/21°

F18SR44A (2) 19” 70 7.15 6 115/60/1 3.0 491/441 120/4°/13/21°

F18SR44B (2) 19” 70 7.15 8 115/60/1 3.0 491/441 120/4°/16/22°

F18SR44C (2) 19” 70 7.15 10 115/60/1 3.0 491/441 120/4°/19/23°

F18SR52A (1) 19” & (1) 27” 70/124 8.97 6 115/60/1 3.0 532/529 120/4°/13/21°

F18SR52B (1) 19” & (1) 27” 70/124 8.97 8 115/60/1 3.0 532/529 120/4°/16/22°

F18SR52C (1) 19” & (1) 27” 70/124 8.97 10 115/60/1 3.0 532/529 120/4°/19/23°

F18SR52D (1) 19” & (1) 27” 70/124 8.97 12 115/60/1 3.0 532/529 120/4°/23/23°

Shelf Max Load (lbs)

Self-Contained Refrigerated Salad Top Tables

Model # Of Doors

F18SC39A (1) 19” 70 4.14 6 115/60/1 10.0 280/265 1903/745 16 1/4 5-15P

F18SC39B (1) 19” 70 4.14 8 115/60/1 10.0 280/353 1903/867 16 1/4 5-15P

F18SC52A (2) 19” 70 7.15 6 115/60/1 10.0 444/265 1903/745 16 1/4 5-15P

F18SC52B (2) 19” 70 7.15 8 115/60/1 10.0 444/353 1903/867 16 1/4 5-15P

F18SC52C (2) 19” 70 7.15 10 115/60/1 10.0 444/441 1903/971 16 1/4 5-15P

F18SC52D (2) 19” 70 7.15 12 115/60/1 10.0 444/529 1903/1061 16 1/4 5-15P

F18SC60A (1) 19” & (1) 27” 70/124 8.97 6 115/60/1 10.0 515/265 2314/667 16 1/4 5-15P

F18SC60B (1) 19” & (1) 27” 70/124 8.97 8 115/60/1 10.0 515/353 2314/798 16 1/4 5-15P

F18SC60C (1) 19” & (1) 27” 70/124 8.97 10 115/60/1 10.0 515/441 2314/916 16 1/4 5-15P

F18SC60D (1) 19” & (1) 27” 70/124 8.97 12 115/60/1 10.0 515/529 2314/1023 16 1/4 5-15P

Shelf Max Load (lbs)

Base Volume

# of

Pans

# of

Pans

Volts/Hertz/

Phase Amps

Volts/Hertz/

Phase Amps

BTU Load Base/Rail

Evap. BTU/°TD

Base/Rail

BTU System

Cap. Base/Rail

R-404A

oz. H.P.

NEMA

Plug

Remote Refrigerated Reduced Height Rail

Model # Of Doors

F18DR44 (2) 19” 70 9.54 5.12 10 115/60/1 3.0 547/441 120/5°/19/23°

F18DR52 (1) 19” & (1) 27” 70/124 13.89 6.51 12 115/60/1 3.0 625/529 120/5°/23/23°

F18DR60 (2) 27” 124 16.64 7.9 16 115/60/1 5.0 703/617 120/6°/26/24°

F18DR70 (2) 32” 140 22.96 9.64 18 115/60/1 5.0 800/794 120/7°/32/24°

F18DR79 (1) 19” & (2) 27” 70/124 22.47 10.29 18 115/60/1 5.0 962/882 240/4°/36/25°

F18DR87 (3) 27” 124 25.22 11.85 22 115/60/1 5.0 1032/970 240/4°/39/25°

Shelf Max Load (lbs)

Base Volume

Shelf

Area FT

# of

Pans

Volts/Hertz/

Phase Amps

BTU Load Base/Rail

Evap. BTU/°TD

Base/Rail

Self-Contained Refrigerated Reduced Height Rail

Model # Of Doors

F18DC52 (2) 19” 70 9.54 5.12 12 115/60/1 10.0 547/529 1903/1061 16 1/4 5-15P

F18DC60 (1) 19” & (1) 27” 70/124 13.89 6.51 14 115/60/1 12.0 625/617 2314/1121 24 1/3 5-15P

F18DC68 (2) 27” 124 16.64 7.9 18 115/60/1 12.0 703/794 2314/1544 24 1/3 5-15P

F18DC82 (2) 32” 140 22.96 9.64 20 115/60/1 14.0 800/882 3097/1648 32 1/2 5-20P

F18DC91 (1) 19” & (2) 27” 70/124 22.47 10.29 22 115/60/1 14.0

F18DC99 (3) 27” 124 25.22 11.85 24 115/60/1 14.0 1032/1147 3807/1839 32 1/2 5-20P

Shelf Max Load (lbs)

Base Volume

Shelf

Area FT

# of

Pans

Volts/Hertz/

Phase Amps

BTU Load Base/Rail

962/1058 3807/1839 32 1/2 5-20P

BTU System

Cap. Base/Rail

R-404A

oz. H.P.

NEMA

Plug

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delﬁeld.com

F18 Series Service and Installation Manual

Specifications

Remote Refrigerated Reduced Height Rail

Model # Of Doors

F18RR44 (2) 19” 70 9.49 5.12 115/60/1 3.0 547/441 120/5°/19/23° 10

F18RR52 (1) 19” & (1) 27” 70/124 11.81 6.51 115/60/1 3.0 625/529 120/5°/23/23° 12

F18RR60 (2) 27” 124 14.14 7.9 115/60/1 5.0 703/617 120/6°/26/24° 16

F18RR70 (2) 32” 140 17.05 9.64 115/60/1 5.0 800/794 120/7°/32/24° 18

F18RR79 (1) 19” & (2) 27” 70/124 18.68 10.29 115/60/1 5.0 962/882 240/4°/36/25° 18

F18RR87 (3) 27” 124 21.30 11.85 115/60/1 5.0 1032/970 240/4°/39/25° 22

Shelf Max Load (lbs)

Self-Contained Refrigerated Reduced Height Rail

Model # Of Doors

F18RC52 (2) 19” 70 9.49 5.12 115/60/1 10.0 547/529 1903/1061 12 16 1/4 5-15P

F18RC60 (1) 19” & (1) 27” 70/124 11.81 6.51 115/60/1 12.0 625/617 2314/1121 14 24 1/3 5-15P

F18RC68 (2) 27” 124 14.14 7.9 115/60/1 12.0 703/794 2314/1544 16 24 1/3 5-15P

F18RC82 (2) 32” 140 17.05 9.64 115/60/1 14.0 800/882 3097/1648 20 32 1/2 5-20P

F18RC91 (1) 19” & (2) 27” 70/124 18.68 10.29 115/60/1 14.0 962/1058 3807/1839 22 32 1/2 5-20P

F18RC99 (3) 27” 124 21.30 11.85 115/60/1 14.0 1032/1147 3807/1839 24 32 1/2 5-20P

Shelf Max Load (lbs)

Base Volume

Shelf

Area FT

Shelf

Area FT

Volts/Hertz/

Phase Amps

Volts/Hertz/

Phase Amps

BTU Load Base/Rail

Evap. BTU/°TD

Base/Rail

BTU System

Cap. Base/Rail

# of

Pans

# of

Pans

R-404A

oz. H.P.

NEMA

Plug

Remote Freezer Base

Model # Of Doors

F18FR35 (1) 19” 70 5.58 2.56 115/60/1 10.0 943 160/6°

F18FR50 (2) 19” 70 12.21 5.12 115/60/1 10.0 1471 160/9°

F18FR58 (1) 19” & (1) 27” 70/124 15.00 6.51 115/60/1 10.0 1844 160/10°

F18FR66 (2) 27” 124 17.79 7.9 115/60/1 10.0 2020 160/11°

F18FR76 (2) 32” 140 21.28 9.64 115/60/1 10.0 2437 160/13°

Shelf Max Load (lbs)

Base Volume

Shelf

Area FT

Volts/Hertz/

Phase Amps

BTU Load Base/Rail Evap. BTU/°TD

Self-Contained Freezer Base

Model # Of Doors

F18FC43 (1) 19” 70 5.58 2.56 115/60/1 10.0 943 1558 1/3 24 5-15P

F18FC62 (2) 19” 70 12.21 5.12 115/60/1 12.0 1471 1776 1/2 40 5-15P

F18FC70 (1) 19” & (1) 27” 70/124 15.00 6.51 115/60/1 16.0 1647 2713 3/4 56 5-20P

F18FC78 (2) 27” 124 17.79 7.9 115/60/1 16.0 1824 2713 3/4 56 5-20P

F18FC88 (2) 32” 140 21.28 9.64 115/60/1 16.0 2045 2713 3/4 56 5-20P

Shelf Max Load (lbs)

Base Volume

Shelf

Area FT

Volts/Hertz/

Phase Amps

BTU Load Base/Rail

BTU System

Cap. Base/Rail H.P.

R-404A

oz.

NEMA

Plug

Self-Contained Dual Rails

Model # Of Doors

F18PD48 (1) 27” 124

F18PD72 (2) 27” 124

Shelf Max Load (lbs)

Base Volume

9.38 3.95

16.64 7.90

Shelf

Area FT

Volts/Hertz/

Phase Amps

115/60/1 10.0 424/1058 2001/1865 1/5, 1/3 40 5-20P

115/60/1 12.7 703/1588 2001/3174 1/5. 1/2 48 5-20P

BTU Load Base/Rail

BTU System

Cap. Base/Rail H.P.

R-404A

oz.

NEMA

Plug

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delﬁeld.com

F18 Series Service and Installation Manual

CAUTION

Installation

Location

These units are intended for indoor use only. Be sure the location chosen has a floor strong enough to support the total weight of the cabinet and contents. A fully loaded 72” (183cm) long model may weigh as much as 1500 pounds (680kg)! Reinforce the floor as necessary to provide for maximum loading.

It is very important to allow for proper air flow, both inside and outside.

Avoid hot corners and locations near stoves, ovens and other pieces of cooking equipment.

It is recommended that the unit be installed no closer than 1” (2.54cm) from any wall. Do not install the unit near any combustible material or object affected by heat or moisture.

PDL models also require 14" (36cm) clearance at the top and 6" (15cm) clearance at the bottom (casters).

Leveling

A level cabinet looks better and will perform better because the drain pan will drain properly, the doors will line up with the frames properly, and the cabinet will not be subject to undue strain.

A unit on legs will have an adjustable bullet foot on each leg, adjust each for a level unit. A unit on casters will not be adjustable. Be sure the unit is on a level floor, make necessary changes to the floor for proper level.

Lock all front casters to ensure the stability of the unit.

Plumbing

Self-contained models are standard with a condensate evaporator. If, for some reason a unit does not have a condensate evaporator, or if the evaporator fails, the unit’s drain must have an outlet to an appropriate drainage area or container. A refrigerated rail will have a 1" (2.54cm) drain which will need to be run to an appropriate floor drain or container. The drain will be stubbed to the bottom of the machine compartment. Either run drain to a floor drain or add a valve to the base of the machine compartment and drain the rail to a container when convenient. The LiquiTec option will NOT have a drain available.

Moisture collecting from improper drainage can create a slippery surface on the floor and a hazard to employees. It is the owner’s responsibility to provide a container or outlet for drainage.

Electrical connection

Refer to the specification pages amperage data, the serial tag, your local code or the National Electrical Code to be sure the unit is connected to the proper power source. A protected circuit of the correct voltage and amperage must be run for connection of the line cord, or permanent connection of the unit.

Self-contained units with a cord and plug have an ON/OFF switch located directly behind the louvered panel covering the compressor section. Simply turn the switch to ON to begin operation.

The power switch must be turned to OFF and the unit disconnected from the power source whenever performing service or maintenance functions.

Never operate the unit without the louvered panel in place!

If electrical receptacles are to be mounted in the unit’s backsplash, they must be wired independently from the existing unit wiring.

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delﬁeld.com

Refrigerator Operation

F18 Series Service and Installation Manual

Power up the unit by turning ON the unit’s ON/OFF switch. Delfield refrigerated bases are designed to maintain an operational temperature of 36°F to 40°F (2°C to 4°C). Temperature in the salad top and refrigerated rail opening is 33°F to 41°F (0°C to 5°C) with pans recessed 2” (5.1cm) on a standard wrapped refrigerated rail or flush with the LiquiTec option at 86°F (30°C) ambient room temperature.

Do not place hot pans on/against the blue ABS liner. Do not throw items into the storage area. Failure to heed these recommendations could result in damage to the interior of the cabinet or to the blower coil.

Overloading the storage area, restricting the air flow, and continuous opening and closing of the doors and drawers will hamper the units ability to maintain operational temperature.

Refrigerated rail units

Product in the rail should be removed to the refrigerated base at the end of the day. This allows you to turn the rail off at night to save energy and the rail will have time to defrost as needed. It also helps maintain product quality. The standard wrapped refrigerated units are controlled by the pressure control which is set to maintain the proper rail temperature. An on/off switch is also provided for the rail and is required to be shut off at night. The rail switch shuts off the rail only. With a LiquiTec rail a thermostat is provided to maintain rail temperature as well as the rail on/off switch. The LiquiTec rail is required to be shut off at night as well to allow for defrosting. To ensure product

quality in the rail it is recommended that product be rotated every four hours.

If adding any item to the unit, be sure to keep in mind the location of the refrigeration lines on wrapped rail units. A refrigeration leak in a rail is extremely difficult and costly to repair. In some cases it cannot be repaired at all.

Refrigerator Evaporator Fan Operation

When the refrigerator is initially powered up or immediately following a power outage the unit will begin cooling after a 3-6 minute delay. During normal operation the evaporator fan pulses independently of the compressor as dictated by the controller as follows:

1. During the cooling mode, compressor and evaporator fan run simultaneously.

2. During the compressor off mode, evaporator fan pulses three minutes on and three minutes off.

3. During an actual defrost event other than the off-cycle defrost, compressor stays off but the evaporator fan runs continuously.

Cooling Cycle Defrost Cycle

Compressor On Compressor Off Compressor Off

Evap Fan OnEvap Fan

Off

Evap Fan OnEvap Fan

Off

Cycles On 3-Min, Off

3-Min

Evap Fan OnEvap Fan

Off

Freezer Operation

Power up the unit by turning ON the unit’s ON/OFF switch. Delfield freezer bases are designed to maintain an operational temperature of 0°F (-18°C).

Overloading the storage area, restricting the air flow, and continuous opening and closing of the doors and drawers will hamper the units ability to maintain operational temperature.

Freezer Evaporator Fan Operation

The evaporator fan(s) and condenser fan will cycle off and on with the compressor to conserve energy. The temperature control will cycle the compressor and condenser fan motor and evaporator fan motor to maintain box temperature at the control setting.

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delﬁeld.com

Cooling Cycle Defrost Cycle

All Freezers

Compressor OnCompressor

Off

Evap Fan On Evap Fan Off Evap Fan Off Evap Fan Off

Self-Contained

Freezers

Compressor OnCompressor

Remote Freezers

Off

Freezer Defrost

Self-contained models use hot gas to defrost the evaporator coils. Remote freezers use electric defrost.

+ 19 hidden pages