DCS RF24-D User manual

1
DCS REFRIGERATED DRAWERS
SERvICE mAnuAl
moDEl
RF24D

1
1. Introduction
1.1 Unit Specications 3
1.2 Serial Nameplate 3
1.3 Before Servicing 3
1.4 Basic Refrigeration Tools 4
1.5 Installation 4
1.6 Electrical Requirements 4
2. Installation
2.1 Essential Requirements -Power 5
2.2 Essential Requirements -Select Location 5
2.3 Essential Requirements -Cabinet Clearance 5
2.4 Essential Requirements -Stability 5
2.5 Essential Requirements -Before Placing Food in the Fresh Food Compartments 6
2.6 Electrical Connection 7
2.7 Grounding Method 7
2.8 Power Requirements 7
2.9 Select Location 8
2.10 Cabinet Clearance 8
2.11 Side Trim Installation 8
2.12 Installing Drawers 8
2.13 Anti-tip Installation - Floor Mount 9
2.14 Anti-tip Installation - Wall Mount 10
3. Sealed System
3.1 Introduction 11
3.2 Low Side Leaks 11
3.3 High Side Leaks 11
3.4 Restricted Capillary Tube 11
3.5 Access Valves 11
3.6 Evaporator Frost Pattern 12
3.7 Pressure and Temperature 12
3.8 Re-charging 13
4. Sealed System Components
4.1 Access to Mechanical Baseplate 14
4.2 Compressor 15
4.3 Condenser 17
4.4 Evaporator 18
5. System Components
5.1 Condenser Fan 19
5.2 Thermistors 20
6. User Interface and Control System Refrigeration Monitor
6.1 Introduction 22
6.2 Starting the Unit 22
6.3 Setting the Temperature Mode 22
6.4 Adjusting the Temperature Mode 22
6.5 Interior Light and Switch 22
6.6 Holiday Mode 23
6.7 Warning Alarms 23
6.8 Resetting the Alarms 23
6.9 Show Room Mode 24
6.10 Error Code Detection 24
6.11 Service Diagnostics Mode 24
TABLE OF CONTENTS

7. Interior Components
7.1 Lights 26
7.2 Drawers (for Refrigerated Drawers) 26
7.3 Glides (for Refrigerated Drawers) 26
7.4 Divider/Center Section (for Refrigerated Drawers) 26
7.5 Heater Strip (for Refrigerated Drawers) 27
7.6 Circulation Fan Assembly 27
8. Wiring Diagram 28
9. Ordering Parts 29
10. Troubleshooting Guide 30
12. Warranty 32
TABLE OF CONTENTS

3
1.1 UNIT SPECIFICATIONS
Table A: Refrigerated Drawers Unit
Cabinet Dimensions (in) Weight
(lbs)
Capac-
ity
Gross
(cu. ft.)
Electrical
Require-
ments
Power
Cord
Length
(ft)
Com-
pressor
Speci-
cations
Refrig-
erant
Charge
(oz)
Refrig-
erant
Type
System
Refrig-
erant
Control
Temperature
Control
Condenser
Fan Motor
Evapora-
tor Fan
Motor
UL
Height Width Depth
34 29-7/8 24-1/4 195 5.8
120VAC/
60 Hz
3.3 Amp
7
Piston
type
120Vac
60 Hz
3.6 134A Capillary
tube
Electronic
Control with
LED display,
thermistor
input, and
Control
System
120 Vac
2.3 W
1300 RPM
12VDC SA6813
1.2 SERIAL NAMEPLATE
The serial nameplate is located inside of the unit on the upper left hand wall. The serial number will need to be
given when inquiring about the unit or ordering parts. See Figure 1.1 below for a sample serial tag with manu-
facturing date code logic.
Figure 1.1
1.3 BEFORE SERVICING
Always disconnect power to any DCS product before attempting to service it. Always verify that power has•
been disconnected.
If the unit has been running, use caution around the condenser, compressor, and copper tubing. These areas•
may be very hot.
Use caution around the evaporator, condenser fins and baseplate edges. These areas are sharp.•
Refrigerant is under high pressure. Always evacuate any system before attempting to open it.•
Reasonable care and safe work methods should be practiced when working on any DCS product. Never work•
with energized electrical equipment in wet or damp areas.
Use an appropriate work area and location when performing repairs. You will find that it is easier to repair•
undercounter units if they are set on a raised platform or workbench.
Always wear protective safety glasses and gloves when working on any DCS product.•
Any refrigerant, whether CFC, HCFC, or HFC (R-12, R-22, or R-134a), must be recovered. Federal regulations•
prohibit the intentional venting or release of refrigerants during the service repair or disposal of an appliance.
INTRODUCTION
SERIAL NUMBER:
20080313119R
2008 03 13 119 R
year month day No. built that
day
Refrig-
eration

4
1.4 BASIC REFRIGERATION TOOLS
The following list contains some of the tools required for basic refrigeration repairs:
Hoses with R-134a couplers (must meet standards for handling R-134a refrigerant)1.
Approved and certied recovery system for R-134a2.
Manifold gage set for R-134a3.
Charging cylinder with R-134a4.
Weight scale (preferably in ounces to the nearest tenth of an ounce)5.
Access valves6.
Small and large tubing cutter7.
Brazing torch8.
Swaging tools9.
Multimeter10.
Leak detection equipment for detection of R-134a11.
Standard hand tools (assorted Phillips and standard screwdrivers, sockets, allen wrenches, adjustable wrenches, etc.)12.
Rivet gun and assorted rivets13.
Drill motor and assorted metal drills14.
Vacuum pump15.
1.5 INSTALLATION
Unit can be installed freestanding or built-in. The front of the unit must be unobstructed for proper air circulation•
and operation at all times.
Unit must be on a LEVEL surface capable of supporting the loaded weight of the unit.•
1.6 ELECTRICAL REQUIREMENTS
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow these requirements could result in personal injury, electrical shock, or re.
120 VAC, 60 Hz., single phase power is needed•
Use an outlet with a 15 amp circuit. A ground fault circuit interrupter (GFI) electrical receptacle is to be used to supply•
electrical power to the refrigerated drawer.
It is recommended that a single circuit receptacle be used for this unit only. DO NOT USE AN EXTENSION CORD.•
INTRODUCTION

5
INSTALLATION  ESSENTIAL REQUIREMENTS
2.1 POWER
The appliance must be installed so the power plug is accessible.•
To ensure that the appliance is not accidentally switched off, connect your refrigerated drawer to its own power point.•
Do not plug in any other appliance at this power point or use extension cords, or double adapters, as the combined
weight of both power cords can pull the double adapter from a wall outlet socket.
For power requirements, refer to the information on the serial plate located at the upper left side, inner wall when the•
door is open.
It is essential that the appliance be properly grounded (earthed) with a three prong receptacle. Never cut or break off•
the grounding prong to fit a two-prong outlet.
2.2 SELECT LOCATION
The proper location will ensure peak performance of your appliance. Choose a location where the unit will be out of•
direct sunlight, away from heat sources and moisture.
Units with fan cooled condensers can be built into an under counter cabinet or freestanding.•
Your refrigerated drawer should be operated in a properly ventilated area with ambient temperatures not to exceed•
below 40 degrees and above 100 degrees Fahrenheit.
Installation should be such that the unit can be moved for servicing if necessary.•
2.3 CABINET CLEARANCE
Ventilation is required from the bottom front section of the unit. Keep this area open and clear•
of any obstructions.
The adjacent cabinets and counter top can be built around the unit as long as no top trim or•
counter top is installed lower than the top of the upper drawer.
2.4 STABILITY
It is important that all four corners of the refrigerated drawer base are supported firmly on a solid level surface to elimi•
nate any cabinet movement.
Installing the appliance on a soft or uneven or unlevel floor may result in twisting of the cabinet and poor sealing of the•
doors. If the doors do not seal properly, warm air will enter the food storage areas causing the temperature to increase,
resulting in food spoilage and food loss.
Position your refrigerated drawer. Turn front leveling legs clockwise (Fig. 2.1) to lower the front leveling leg. Raise the•
front of the appliance until it is stable and level.
The front leveling legs should take the majority of the weight of the cabinet and the cabinet should be stable, i.e. cabinet•
should not rock or wobble.
WARNING
A free standing refrigerated drawer must have an anti-tip device installed for safety.
Figure 2.1 Leveling Leg

6
INSTALLATION  ESSENTIAL REQUIREMENTS
See anti- tip bracket installations (page 9 and 10).•
2.5 BEFORE PLACING FOOD IN THE FRESH FOOD COMPARTMENTS
Remove all packaging. Ensure that all transit tape is removed from the refrigerated drawer.•
Clean the inside of the appliance with warm water and a little liquid detergent to remove manufacturing and transporta-•
tion dust.
Allow the refrigerated drawer to run empty for 2 - 3 hours to allow each compartment to cool to the appropriate temper-•
ature.
The appliance may have an odor on its initial operation, but this will go away when the refrigerated drawers have•
cooled sufficiently.

7
INSTALLATION
HOW TO INSTALL YOUR OUTDOOR REFRIGERATED DRAWER
2.6 ELECTRICAL CONNECTION
Check serial plate for correct power supply. Use only electrical power supply as specified on your appliance serial
nameplate. Do not use an extension cord!
WARNING!
Do not splash or spray water from a hose onto the refrigerated drawer!
Doing so may cause an electrical shock, which may result in severe injury or death.
2.7 GROUNDING METHOD
This product is factory equipped with a power supply cord that has a three-pronged grounded plug. It must be plugged
into a mating grounding type receptacle in accordance with the National Electrical Code and applicable local codes and
ordinances. If the circuit does not have a grounding type receptacle, it is the responsibility and obligation of the customer
to exchange the existing receptacle in accordance with the National Electrical Code and applicable local codes and
ordinances. The third ground prong should not, under any circumstances, be cut or removed. All UL listed refrigerated
products are equipped with this type of plug.
A ground fault circuit interrupter (GFI) electrical receptacle is to be used to supply electrical power to the refrigerated drawer
for outdoor applications. Contact an electrician if you need to install one to supply electrical power to your outdoor refriger-
ated drawer.
2.8 POWER REQUIREMENTS
24” Outdoor Refrigerated Drawer
120V 60Hz•
1800 watt•
3 wire outlet•
15 amp circuit•
AC Interface
Grounding Type
Wall Receptacle
Power Supply Cord
with 3-Prong
Grounding
Plug
NOTE: the plug show is for 120V units
Figure 2.2 Figure 2.3

8
INSTALLATION
HOW TO INSTALL YOUR OUTDOOR REFRIGERATED DRAWER
2.9 SELECT LOCATION
The proper location will ensure peak performance of your appliance. Choose a location where the unit will be out of direct
sunlight, away from heat sources and moisture. Units with fan cooled condensers can be built in. Unit should be operated
in a properly ventilated area with ambient temperatures above 40 degrees and below 100 degrees Fahrenheit.
Installation should be such that the cabinet can be moved for servicing if necessary.
2.10 CABINET CLEARANCE:
Ventilation is required from the bottom front section of the unit. Keep this area open and clear of any obstructions.•
The adjacent cabinets and counter top can be built around the unit as long as no top trim or counter top is installed•
lower than the top of the upper drawer. See Fig. 2.5.
2.11 SIDE TRIM INSTALLATION
Prior to installation, align trim with the refrigerated drawer height and mark the screw hole locations. Attach side trim to
the inner side of the cabinet so that the trim faces outward (away from the appliance’s door) and fasten with appropriate
screws suitable for the type of cabinet material (Fig. 2.6).
2.12 INSTALLING DRAWERS
Place the unit in front of the counter opening. Make sure that the floor is protected when sliding the drawer unit into•
place.
Determine the minimum height of the counter top opening (Fig. 2.5).•
Lower the front and rear leveling legs (Fig. 2.5) so the top of the drawer cabinet is 1/8” lower in the back of the•
cabinet and 1/2” lower in the front of the cabinet than the counter top opening.
Make the electrical connection by plugging the unit into the power outlet and locating the power cord so it will not be•
damaged when the refrigerated drawer is installed.
Slide the refrigerated drawer into cabinet location and adjust the front legs until the unit is level and there is the same•
amount of load on each leg.
24” Outdoor Refrigerated Drawers
15-1/8
15-1/8
3-1/2” 24-1/8
Dimensions Island Preparation Side Trim Installation
Mounting
screw not
provided
Figure 2.4 Figure 2.5 Figure 2.6

9
INSTALLATION
ANTITIP INSTALLATION INSTRUCTIONS
A free standing refrigerated drawer must have an anti-tip device installed as per these instructions. If the drawer is removed
from its location for any reason, make sure that the device is properly engaged when you push the drawer back into the
original location. If device is not properly engaged, there is a risk of the drawer tipping over, causing property or personal
injury if you or a child stand, sit, or lean on an open drawer.
2.13 FLOOR MOUNT INSTALLATION:
The anti-tip bracket can be located on the floor in the left or right rear corner
of the refrigerated drawer.
Step by step instructions for locating the position of the bracket:
1. Decide where you want to place the Drawer. Make a temporary line on
the floor in line with the drawer face, “A” as shown in Figure 06.
2. At the center point where the drawer will be, draw a center line “B”
(Fig. 2.7) perpendicular to line “A” to the rear of the unit. Make a mark
on line “B “ 24-1/2 inches from line “A”.
3. Then make another perpendicular line “C”at this mark.
Make a mark on line “C” 11-1/2 inches from line “B”
either right or left.
4. At this mark, drill 1/8” diameter pilot hole in the floor.
5. Fasten the bracket to the floor thru the slotted hole (see
Fig. 2.8) using the appropriate fasteners for the type of
floor.
6. Position the unit so that the leveling leg engages into the
anti-tip bracket (Fig. 2.8).
7. Check for proper installation of the drawer and anti-tip
device by grasping the back of the unit and carefully
attempting to tilt the drawer forward.
WARNING
• ALL DRAWERS CAN TIP
• INJURY COULD RESULT
• INSTALL ANTI-TIP
BRACKET PACKED
WITH UNIT
• SEE INSTRUCTIONS
11-1/2”
24-1/2”
23-7/8”
Center line
24”
11-1/2”
CE
NT
ER LINE
PE
R
P
E
ND
I
C
ULA
R LI
NE
BOTTOM VIEW OF DRAWER
Front
Refrigerated
Drawer
Anti-tip
Bracket
A
B
B
C
Leveling Leg Slotted hole
for floor
installation
Open slot
Figure 2.7
Figure 2.8

10
INSTALLATION
ANTITIP INSTALLATION INSTRUCTIONS
2.14 WALL MOUNT
1. Remove the bracket from its original shipping position on the back of the
unit (Fig. 2.9 and 2.10).
2. Reattach the bracket to the back of the unit using the existing screws from
the unit’s back panel (Fig 2.11).
3. Push the unit against the wall so the bracket is flush with the wall
adjacent to the back panel.
4. Using a pencil and the bracket as a template, trace the bracket on the
wall, making sure 2 of the screw holes are aligned with a stud in the
wall.
5. Pull the unit away from the wall.
6. Remove the screws that connect the upper and lower sections of the
Anti-Tip Bracket. Mount the lower section of the bracket that is not
attached to the unit to the wall where you had marked and drilled pilot
holes in the wall/wall stud for mounting. Attach the lower bracket to
wall.
7. Push the unit back against the wall and align the upper section with
the lower section of the Anti-Tip Bracket such that you can refasten the
original screws that secure the upper and lower sections of the Anti-Tip
Bracket (Fig. 2.12). Your installation is now complete.
Figure 2.9
Figure 2.10
Figure 2.12
Figure 2.11
To Drawer
Refrigerator
To wall
SIDE VIEW
Adjacent wall
Drawer Refrigerator

11
3.1 INTRODUCTION
The following should always be practiced with any sealed system that has been opened. ONLY OPEN THE SEALED
SYSTEM AS A LAST RESORT AND AS A FINAL DIAGNOSIS. Always check other areas of operation such as wiring, airow,
thermostat, etc. before opening up the sealed system. Many times these areas can resemble sealed system problems.
The diagnosis of a sealed system can be determined by accurate pressure and temperature measurements. Also, check-
ing the evaporator frost pattern is a great way to tell if a charge is adequate within a system.
Use a leak detection system that will detect R-134a refrigerant. Leaks need to be found on any leaking system BE-1.
FORE the repair takes place.
The drier must be replaced anytime the sealed system is opened. Always use a DCS drier. Failure to do so may cause2.
repeated system failure in the future.
Limit time the system is opened. DO NOT EXPOSE THE OPEN SYSTEM FOR MORE THAN 15 MINUTES. This will result3.
in sealed system failure. Leave replacement parts sealed and/or pressurized until ready to install.
The compressor must be replaced if there is a low side leak. Moisture has been drawn into the system if the unit has4.
been running for an extended period of time. Be sure to ush the system with dry nitrogen gas and evacuate to 50
microns before re-charging (see Section 2.2, Low Side Leaks).
A new evaporator assembly must be ordered if the capillary tube is found to be plugged or severely restricted. Re-5.
strictions cannot be ushed out.
Be sure to purge the system with dry nitrogen gas after nal brazing. This will ush out any air or moisture that may6.
have entered the system before being absorbed into the ester oil.
3.2 LOW SIDE LEAKS
Low side leaks consist of a break in the system at the evaporator, low side (suction) return line, or accumulator. If a leak is
found in any of these areas, moisture has probably entered the system. The compressor and drier will have to be replaced
and the system will need to be ushed thoroughly with nitrogen gas and evacuated to 50 microns before re-charging.
3.3 HIGH SIDE LEAKS
High side leaks consist of a break in the system at the condenser, high side tubing, drier, or capillary tube. If a leak is
found in any of these areas, the drier must be replaced and the system can be ushed with nitrogen gas, evacuated to 50
microns, and re-charged.
3.4 RESTRICTED CAPILLARY TUBE
Moisture or other contaminants that enter the system can cause deposits in the system. These deposits will usually col-
lect in the capillary tube and form a restriction that cannot be completely removed by ushing. If the capillary tube is
found to be restricted, the evaporator, compressor, condenser, and drier should all be replaced.
3.5 ACCESS VALVES
A temporary access valve can be used to service or evaluate the system. From these access valves, you can evacuate,
charge, and recover the system. The access valve can be installed on the compressor’s process tube (this will also be a
low pressure side). Be sure to cap o access valve while servicing. This will prevent contamination of the system and/or
refrigerant from leaking. After servicing, the access valve should be removed. A pinch-o tool can be used to close the
system to remove the access valve and then braze the hole for the access valve to seal the system. Be sure to leak check
after brazing.
SEALED SYSTEM

12
3.6 EVAPORATOR FROST PATTERN
Checking the evaporator frost pattern is a good way to quickly diagnose simple sealed system problems. This can
be done by allowing the unit to run (at least 10 minutes) with the door open for at least 5 minutes. This will help
speed up the normal frosting of the evaporator plate. By visually inspecting the evaporator and feeling it with your
hands, you will see and feel frost across the plate. It is absolutely necessary for the frost to cover the entire evapora-
tor plate. This will ensure the system has been charged to its specified amount or does not have a leak. A partial
frost pattern may lead to excessive run times or even 100% run mode. This is because the frost does not reach the
area of the evaporator thermistor thus it does not sense the temperature required to cycle the unit off.
3.7 PRESSURE AND TEMPERATURE
There are a couple of ways to measure temperature of the evaporator plate:
Use a thermocouple to measure the temperature of the evaporator plate. The thermocouple must be secured to the1.
evaporator when taking the measurement.
If it has been determined that there is proper contact between the thermistor and evaporator plate, the thermistor2.
resistance value can be corresponded to the temperature (see Table C in Section 5.2, Thermistors for values).
NOTE: The temperature and pressure reading must be taken while the unit is on and running. Use gage pressure read-
ings from the compressor’s process tube (low side) access valve.
Table B: Refrigeration Temperature-Pressure Chart for R-134a
Degrees F Pressure (psi) R-134a Degrees F Pressure (psi) R-134a
-12 1.1 36 31.3
-8 2.8 38 33.2
-4 4.5 40 35.1
0 6.5 42 37.0
2 7.5 44 39.1
4 8.5 46 41.1
6 9.6 48 43.3
8 10.8 50 45.5
10 12.0 52 47.7
12 13.1 56 52.3
14 14.4 60 57.5
16 15.7 64 62.7
18 17.0 68 68.3
20 18.4 72 74.2
22 19.9 76 80.3
24 21.4 80 86.8
26 22.9 84 93.6
28 24.5 88 100.7
30 26.1 92 108.2
32 27.8 96 116.1
34 29.5 100 124.3
Pressure will vary depending upon the ambient temperature and current stage of operation for the unit. For example,
the unit will have pressure between 0 and 5 psi just before entering the o cycle. Normal running pressures on the low
side will average 5 to 10 PSI.
SEALED SYSTEM

13
If low side pressure is below pressure in Table B, check for the following:
A system leak1.
Capillary tube or evaporator is restricted2.
Insucient compressor (does not pump properly)3.
If low side pressure is above pressure in Table B, check for the following:
Restricted air ow1.
Dirty condenser coil2.
Overcharged system3.
Low side leak4.
Inecient compressor5.
3.8 RE-CHARGING
Re-charging of the unit should be done only after diagnosing and repairing the system. Be sure to ush the system with dry nitro-
gen gas and evacuate to 50 microns before re-charging.
The method for re-charging the unit is by weight using vapor refrigerant. Using manifold gage set-up, hook up charge hoses to
the access valve on the compressor’s process tube. If any access valve is attached to the high side process tube, remove it and
then seal the tube by brazing before charging. Charge the unit to specied amount (see Section 1.1, Unit Specications for charge
specications per model).
After re-charging the system, check pressures and refer to Table B for corresponding temperatures and pressures. If pressures are
incorrect, check the sealed system, recover the charge, repair, evacuate, and then re-charge.
It is normal to have some condensation or slight frost on the suction line. Typically this will occur towards the end of a run cycle. If
the frost continues down the suction line to the compressor, the system is overcharged. It is important that the insulation re-
mains on the suction line and the capillary tube together after any repair and that it is sealed on both ends. Be sure to replace the
refrigeration putty in the hole of the foam where the refrigerant lines go through the back of the unit. Spread the putty out evenly
lling in the cracks to prevent air from leaking in and out.
SEALED SYSTEM

14
4.1 GAINING ACCESS TO MECHANICAL BASEPLATE
The mechanical baseplate is located in the rear of the unit. Most major mechanical and electrical components on the
unit mount directly to the baseplate. This creates easy access for servicing of the sealed system and mechanical/electri-
cal components. To gain access to the mechanical baseplate, remove the screws that hold the lower shroud in place
and then remove the shroud (see Figure 4.1). To facilitate working on any component mounted to the mechanical base,
remove the screws that hold the baseplate to the chair frame and slide out the baseplate enough to allow working room
required (see Figures 4.2 and 4.3).
Figure 4.1
Remove screws.
Figure 4.2
Remove screws securing
the mechanical baseplate.
Figure 4.3
Slide out the mechanical
baseplate.
SEALED SYSTEM COMPONENTS

15
4.2 COMPRESSOR
The compressor is the heart of the refrigeration system (see Figure 4.4). However, it relies on other parts of the system to function.
Make certain that the other parts of the system are functioning correctly before determining that the compressor is faulty.
Figure 4.4
Compressor
Drier
The following should be observed before concluding the compressor is faulty:
Low high side pressures, warm evaporator plate, cool condenser coil, or little or very low current draw from the unit will indi-1.
cate a faulty compressor.
Check for continuity between the compressor terminals and the shell of the compressor. If continuity is found, the compres-2.
sor is faulty and will need to be replaced.
Check for resistance between all compressor terminals. The resistance will vary from terminal to terminal and from compres-3.
sor to compressor due to age and use. If no resistance is found, the compressor is faulty and will need to be replaced.
Removing the Compressor:
Disconnect power to the unit.1.
Remove the back panel and lower shroud (see Figure 4.1).2.
Remove the screws that hold the baseplate to the chair frame of the unit and slide out the mechanical baseplate (see Figures3.
4.2 and 4.3).
Install sealed system access valve(s) and recover refrigerant. After recovering, be sure to cap o the access valve(s) to prevent4.
contamination of the system.
Remove the cap from the rear of the compressor to expose the starter and overload (see Figures 4.5 and 4.6).5.
Disconnect the PTC starter and overload from the compressor by pulling o. Disconnect the wires from the starter and over-6.
load.
Un-braze and remove capillary tube from drier assembly (see Figure 4.4).7.
Un-braze and remove suction line at compressor (see Figure 4.7).8.
Un-braze high side line from the compressor going to the condenser (see Figure 4.7).9.
Remove compressor by removing the three lock nuts on the mounting plate of the compressor (see Figure 4.7). Lift the com-10.
pressor o of the carriage bolts.
SEALED SYSTEM

16
Installing the Compressor:
Install the four rubber grommets in the bottom of the new compressor and install the three sleeves where the carriage bolts1.
will be located. Mount the new compressor and install the three washers and lock nuts and tighten to 45 in-lbs. DO NOT
REMOVE THE RUBBER PLUGS AT THE TUBE STUBS ON THE COMPRESSOR AT THIS TIME.
Install and braze new drier assembly to condenser. Then install and braze capillary tube to drier. Remove the plug for the2.
high side line to condenser. Install and braze the line to the compressor.
Remove the plug for the process tube on the compressor. Install and braze process tube. Be sure to cap o end to prevent3.
any contamination.
Remove the plug for the suction line on the compressor. Install and braze the suction line from the evaporator. BE SURE TO4.
ALSO REINSTALL THE SUCTION LINE AND TUBING HARNESS INSULATION TUBES.
Reinstall the PTC starter and overload and wire according to the wiring diagram (see page 28, Wiring).5.
Reinstall the compressor cap.6.
Reinstall the screws that secure the baseplate to the chair frame of the unit. Be sure to fasten down the ground wire to the7.
baseplate.
Charge the unit (see Section 3.8, Re-charging).8.
Reinstall back panel and lower shroud to complete installation.9.
Figure 4.5 Figure 4.6
Figure 4.7
Process tube
High side tubing going to the
condenser.
Suction line tubing going to the
evaporator.
Compressor lock-nut
SEALED SYSTEM

17
4.3 CONDENSER
The condenser is a steel tube serpentine with copper alloy ns that removes heat from hot, high pressure vapor from the com-
pressor (see Figure 4.8). The most common trouble is lack of airow from either a restricted intake or exhaust opening in the front
of the unit. Lint, dust, hair, and dirt build-up needs to be removed from the condenser periodically to allow the unit to perform
properly.
Figure 4.8
It is possible that the condenser might need replaced because of an unrepairable leak or a restriction that cannot be ushed out.
System high side pressures and temperatures will verify if this is the case.
Removing the Condenser:
Disconnect power to the unit.1.
Remove back panel and lower shroud (see Figure 4.1).2.
Remove the screws that hold the baseplate to the chair frame of the unit and slide out the mechanical baseplate (see Figures3.
4.2 and 4.3).
Install sealed system access valve(s) and recover refrigerant. After recovering, be sure to cap o the access valve(s) to prevent4.
contamination of the system.
Remove the condenser fan by removing the four screws on the fan mounting bracket at the baseplate. The fan wire leads can5.
be left connected. Set the fan assembly to the side out of the mechanical.
Remove the condenser fan shroud.6.
Un-braze capillary tube from drier assembly.7.
Un-braze high side tubing from the compressor.8.
Remove the condenser and drier assembly.9.
Installing the Condenser:
Reverse the removal procedure for installation (see above). Always install a new drier after opening the sealed system. Be sure to
ush the system and evacuate to 50 microns before weight charging. If contamination was found or determined, the evaporator
should also be replaced at this time.
SEALED SYSTEM

18
4.4 EVAPORATOR
The evaporator uses evaporating refrigerant to remove heat from the inside of the unit ultimately making the interior cold. The
shape and size of the evaporator may vary among the models covered by this service manual but the fundamentals are the same
(see Figures 4.9). The RF24D uses a vertical right angle evaporator plate.
It is normal for the evaporator to frost up during its run cycle. This frost will dissipate once the unit reaches its “cut out” tempera-
ture and the compressor and fan stop. This condensate water will ow to the rear of the machine in a condensate pan where it will
be evaporated from compressor and fan heat. It is very important that the evaporator frosts in a uniform pattern across the plate
(see Section 3.6, Evaporator Frost Pattern). A partial frost pattern can lead to excessive run times and cooling issues.
Figure 4.9:
Evaporator plate used in the RF24D
SEALED SYSTEM