Friedrich Hazardgard SH15L30-C User manual

Service Manual
Room Air Conditioners
HG-ServMan (04-09)
Model:
SH15L30-C
SH15L30-D
SH20L30-C
SH20L30-D

FRIEDRICH AIR CONDITIONING CO.
Post Ofce Box 1540 · San Antonio, Texas 78295-1540
4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212
[phone] · FAX [phone]
www.friedrich.com
Printed in the U.S.A.
TECHNICAL SUPPORT
CONTACT INFORMATION

Table Of Contents
Important Safety Information ....................................................................................................................2-4
Introduction ..................................................................................................................................................4
Unit Identication .........................................................................................................................................5
Performance Specications and Installation Data .......................................................................................6
Electrical Data ..............................................................................................................................................7
HazardGard Special Features ......................................................................................................................8
Control Panel ................................................................................................................................................8
Component Denitions .................................................................................................................................9
Component Testing ................................................................................................................................10-11
Sealed System Refrigeration Repairs .........................................................................................................12
Refrigerant Charging .............................................................................................................................12-15
Compressor Checks ..............................................................................................................................16-17
Compressor Replacement ..........................................................................................................................18
Routine Maintenance .............................................................................................................................19-20
Troubleshooting .....................................................................................................................................21-23
Wiring Diagram and Schematic ..................................................................................................................24
Warranty .....................................................................................................................................................25
1

IMPORTANT SAFETY INFORMATION
The information contained in this manual is intended for use by a qualied service technician who is familiar
with the safety procedures required for installation and repair, and who is equipped with the proper tools and
test instruments required to service this product.
Installation or repairs made by unqualied persons can result in subjecting the unqualied person making
such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical
shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
warnings to guard against any bodily injury or property damage which may result to you or others.
PERSONAL INJURY OR DEATH HAZARDS
ELECTRICAL HAZARDS:
Unplug and/or disconnect all electrical power to the unit before performing inspections, •
maintenance, or service.
Make sure to follow proper lockout/tag out procedures.•
Always work in the company of a qualied assistant if possible. •
Capacitors, even when disconnected from the electrical power source, retain an electrical charge •
potential capable of causing electric shock or electrocution.
Handle, discharge, and test capacitors according to safe, established, standards, and approved •
procedures.
Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary •
to test or troubleshoot equipment with the power on to the unit.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read
and obey all safety messages.
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury,
and tell you what will happen if the instructions are not followed.
This is a safety Alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol with the word “WARNING”
or “CAUTION”. These words mean:
You can be killed or seriously injured if you do not follow instructions.
You can receive minor or moderate injury if you do not follow instructions.
A message to alert you of potential property damage will have the
word “NOTICE”. Potential property damage can occur if instructions
are not followed.
WARNING
CAUTION
NOTICE
2

Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel, •
and sleeve on the room side of the air conditioning unit while cleaning.
Electrical component malfunction caused by water could result in electric shock or other electrically •
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.
Never operate the A/C unit with wet hands.•
Use air conditioner on a single dedicated circuit within the specied amperage rating. •
Use on a properly grounded outlet only.•
Do not remove ground prong of plug.•
Do not cut or modify the power supply cord.•
Do not use extension cords with the unit.•
Follow all safety precautions and use proper and adequate protective safety aids such as: gloves, •
goggles, clothing, adequately insulated tools, and testing equipment etc.
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.•
REFRIGERATION SYSTEM HAZARDS:
Use approved standard refrigerant recovering procedures and equipment to relieve pressure before •
opening system for repair.
Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor •
to moderate injury.
Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s ame or hot •
surfaces can cause serious burns.
Make sure to protect personal and surrounding property with re proof materials.•
Have a re extinguisher at hand while using a torch.•
Provide adequate ventilation to vent off toxic fumes, and work with a qualied assistant whenever •
possible.
Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for •
leaks, ushing etc.
Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves, •
safety glasses, clothing etc.
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.•
MECHANICAL HAZARDS:
Extreme care, proper judgment and all safety procedures must be followed when testing, •
troubleshooting, handling, or working around unit with moving and/or rotating parts.
Be careful when, handling and working around exposed edges and corners of sleeve, chassis, and •
other unit components especially the sharp ns of the indoor and outdoor coils.
Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.•
3

PROPERTY DAMAGE HAZARDS
FIRE DAMAGE HAZARDS:
Read the Installation/Operation Manual for this air conditioning unit prior to operating.•
Use air conditioner on a single dedicated circuit within the specied amperage rating. •
Connect to a properly grounded outlet only.•
Do not remove ground prong of plug.•
Do not cut or modify the power supply cord.•
Do not use extension cords with the unit.•
Failure to follow these instructions can result in re and minor to serious property damage.•
WATER DAMAGE HAZARDS:
Improper installation maintenance, or servicing of the air conditioner unit, or not following the above •
Safety Warnings can result in water damage to personal items or property.
Insure that the unit has a sufcient pitch to the outside to allow water to drain from the unit. •
Do not drill holes in the bottom of the drain pan or the underside of the unit. •
Failure to follow these instructions can result in result in damage to the unit and/or minor to serious •
property damage.
4
INTRODUCTION
This service manual is designed to be used in conjunction with the installation manuals provided with each unit.
This service manual was written to assist the professional HVAC service technician to quickly and accurately
diagnose and repair any malfunctions of this product.
This manual, therefore, will deal with all subjects in a general nature. (i.e. All text will pertain to all models).
IMPORTANT:It will be necessary for you to accurately identify the unit you are
servicing, so you can be certain of a proper diagnosis and repair.
(See Unit Identication.)

Serial Number
Decade Manufactured
L=0 C=3 F=6 J=9
A=1 D=4 G=7
B=2 E=5 H=8
L H G R 00001
Production Run Number
Year Manufactured
A=1 D=4 G=7 K=0
B=2 E=5 H=8
C=3 F=6 J=9
Product Line
R = RAC
Month Manufactured
A=Jan D=Apr G=Jul K=Oct
B=Feb E=May H=Aug L=Nov
C=Mar F=Jun J=Sept M=Dec
1st Digit – Function
S = Straight Cool, Value Series
H = HazardGard
3rd and 4th Digit - Approximate
BTU/HR (Cooling)
Heating BTU/Hr capacity listed in the
Speci cation/Performance Data Section
8th Digit – Engineering
Major change
7th Digit – Options
0 = Straight Cool &
6th Digit – Voltage
3 = 230-208 Volts
5th Digit
Alphabetical Modier
Model Number Code
S H 15 L 3 0 A
RAC Serial Number Identication Guide
UNIT IDENTIFICATION
5

SPECIFICATIONS AND PERFORMANCE DATA
Model Height Width
Depth
Overall
Depth
Hood to
Louvers
Minimum
Extension
Into Room
Minimum
Extension
Outside
Window Width
(Inches)
Thru-The-Wall
Finished Hole
(Inches)
Circuit Rating
Breaker or
T - D Fuse
Weight
(Lbs.)
Min. Max. Height Width Volts - Amps Net Shipping
SH15L30
15 ⁄ 25 ⁄ 27 ⁄ 9 ⁄ 3 ⁄ 16 ⁄ 27 ⁄ 42 16 ⁄ 26 ⁄ 250V - 15A 140 152
SH20L30
17 ⁄ 25 ⁄ 27 ⁄ 9 ⁄ 3 ⁄ 16 ⁄ 27 ⁄ 42 16 ⁄ 26 ⁄ 250V - 15A 166 179
Installation Information
Product Specifications
Cooling Performance Data
EVAPORATOR AIR
TEMP. DEG. F CONDENSER
TEMPERATURE
DEG. F
Discharge
Temp
Suction
Temp
Super
Heat
Sub-
Cooling
OPERATING
PRESSURES ELECTRICAL RATINGS R-22 REF.
Voltage
BREAKER
FUSE
Discharge
Air Temp. Drop F. Suction Discharge Amps Cool Amps Heat Locked Rotor Amps Charge in OZ. 60 Hertz Amps
SH15L30-C 54 26 206 129 61 16 98 76 258 8.2 - 43 28.5 208 / 230 15
SH15L30-D 54 26 206 129 61 16 98 76 258 8.2 - 43 28.5 208 / 230 15
SH20L30-C 46 34 125 196 52 8 28 75 271 10.1 - 52 39.0 208 / 230 15
SH20L30-D 46 34 125 196 52 8 28 75 271 10.1 - 52 39.0 208 / 230 15
Model
Cooling Capacity
BTU/h
Electrical Characteristics (60 Hertz) Energy
Efciency
Ratio AHAM
EER
Moisture
Removal
(Pints/Hr.)
Air Direction
Controls
Room Side Air
Circulation
CFM
Volts Rated Amps AHAM Watts
SH15L30
15000/15000 230/208 7.9/8.7 1765/1765 8.5/8.5 4.0 8-way 375
SH20L30
19800/19500 230/208 10.0/10.97 2200/2167 9.0/9.0 5.7 8-way 375
OPERATING TEMPERATURE CODE T3B
Due to continuing engineering research and technology, specications are subject to change without notice.
Manufactured under U.S. Design Patent DES 368, 306 decorative front; Utility Patent 5, 622, 058
MAXIMUM TEMPERATURE RATING FOR CLASS I, DIVISION 2, GROUPS A,B,C,D
MAXIMUM outdoor ambient operating temperature is 130°F (54°C).
6

ELECTRICAL DATA
ELECTRICAL REQUIREMENTS
ELECTRIC SHOCK HAZARD
WARNING
Turn off electric power before service or
installation.
All electrical connections and wiring MUST be
installed by a qualied electrician and conform to
the National Electrical Code and all local codes
which have jurisdiction.
Failure to do so can result in personal injury or
death.
Not following the above WARNING could result in re or
electically unsafe conditions which could cause moderate
or serious property damage.
Read, understand and follow the above warning.
NOTICE
FIRE HAZARD
ALL FIELD WIRING MUST MEET THE REQUIREMENTS OF THE NATIONAL ELECTRICAL CODE (ANSI/NFPA 70)
ARTICLE 501.
THE FIELD-PROVIDED CIRCUIT PROTECTION DEVICE (HACR CIRCUIT BREAKER OR TIME DELAY FUSE)
MUST NOT EXCEED THE AMPACITY INDICATED ON THE PRODUCT NAMEPLATE.
IMPORTANT: Before you begin the actual installation of your air conditioner, check local electrical codes and the
information below.
Your air conditioner must be connected to a power supply with the same A.C. voltage and frequency (hertz) as marked
on the data plate located on the chassis. Only alternating current (A.C.), no direct current (D.C.), can be used.
An overloaded circuit will invariably cause malfunction or failure of the air conditioner therefore, it is extremely important
that the electrical power is adequate. Consult your power company if in doubt.
Model Number Connection Type Circuit Rating
Time Delay Fuse
SH15 Junction Box 250V-15 Amp
SH20 Junction Box 250V-15 Amp
7

Permanent Split-Capacitor, totally enclosed fan motor
to assure efcient operation even under adverse
electrical conditions. Motor has a special stainless
steel shaft to resist corrosion and a hermetically sealed
overload for arc-free operation.
High capacity compressor with internal hermetically
sealed overload.
Solid-state printed circuit board insulated against
corrosion on conductor paths. Contains transient
voltage suppressor to protect controls against transient
voltage spikes. Provides solid state switches for arc-
free operation.
Hot gas bypass low ambient control to permit operation
without freezing at outdoor ambient temperatures as
low as 45°F (7°C).
Environmentally sealed on-off switch and gold plated
contacts in thermostat for corrosion resistance.
Electrodeposited epoxy primer and alkyd enamel, both
oven-baked for an attractive, long-lasting nish.
• •
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Copper tubing/aluminum n coils.
Galvanized steel cabinet and base pan, all bonderized.
Slide-out chassis for easy installation in window or
through–the–wall.
Extra insulation inside, including completely insulated
plenum chamber for quieter, more efcient cooling.
Entire unit test run in environmental chamber before
crating.
Eight–way air ow control for uniform air circulation.
Patented electronic control circuit.
Condensate drain with exclusive mosquito trap.
15 amp circuit with time-delay fuse required.
Accommodates direct wiring.
Long lasting 3/8” (10mm) thick air lter, germicidally
treated, easily removed for cleaning.
Friedrich Air Conditioning quality has been proven by more than 25 years of successful experience from the Gulf
of Mexico to the searing sands of the Arabian desert.
Function Control (Power)
This switch is a double pole, single throw toggle switch.
ON - Turns everything on.
OFF - Turns everything off.
Temperature Control
The knob at the bottom is the thermostat which is a cross
ambient type used to maintain the desired comfort level.
The thermostat reacts only to a change in temperature at
the bulb location - turn the knob clockwise to set cooler,
counterclockwise for warmer.
Friedrich leads with the rst UL Listed Room Air
Conditioners designed to cool living quarters and other
enclosures situated in hazardous locations where specic
volatile ammable liquids or gases are handled or used
with enclosed containers or systems. Friedrich Hazardgard
room air conditioners are designed to meet the National
Electrical Code, Article 500 requirements for Class I,
Division 2, Groups A, B, C, D Hazardous locations, and are
the only air conditioners UL Listed for this application. THIS
UNIT IS LISTED BY UNDERWRITERS LABORATORIES
FOR USE IN CLASS I, DIVISION 2,GROUPS A, B, C, D
HAZARDOUS LOCATIONS.
Operating Temperature Code: T3B.
HAZARDGARD SPECIAL FEATURES
Control Panel
Exclusive
8