Friedrich HAZARDGARG R-410A User manual

R-410A Models
Service Manual
2010
HG-ServMan (4-10)
SH15M30A
SH20M30A
Cool Only
Hazardous Duty
Room Air Conditioner

Table Of Contents
Important Safety Information ..................................................................................................................... 2-4
Introduction ................................................................................................................................................... 4
Unit Identication .......................................................................................................................................... 5
Hazardgard Application ................................................................................................................................ 6
Performance Specications and Installation Data ........................................................................................ 7
Electrical Data .............................................................................................................................................. 8
HazardGard Special Features ...................................................................................................................... 9
Component Denitions ............................................................................................................................... 10
Component Testing ................................................................................................................................ 11-12
R-410A Sealed System Repair Considerations .......................................................................................... 13
Sealed Refrigeration System Repairs ................................................................................................... 14-17
Refrigerant Charging ............................................................................................................................. 14-17
Compressor Checks .............................................................................................................................. 18-19
Compressor Replacement ..................................................................................................................... 19-20
Routine Maintenance ............................................................................................................................. 21-22
Performance Test Data Sheet ..................................................................................................................... 23
Troubleshooting ..................................................................................................................................... 24-26
Wiring Diagram and Schematic .................................................................................................................. 27
Warranty ..................................................................................................................................................... 28
Technical Assistance ................................................................................................................................... 29
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 operation and installation manual 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.)
Discharge Air Plenum
Slot
Tab
Latches
Return air grille
Latch
Slot
Tab
Return Air Grille

Serial Number
Decade Manufactured
L=0 C=3 F=6 J=9
A=1 D=4 G=7
B=2 E=5 H=8
A K A 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 M 3 0 A
RAC Serial Number Identication Guide
UNIT IDENTIFICATION
5

UL Listed for use in Class I, Division 2, Groups A, B, C
andD hazardous locations.
Hazardgard is specically designed to cool living quarters, storage areas
and otherenclosures situated in hazardous locations, where specic volatile
ammable liquids or gases are handled or used within enclosed containers
or systems.
For more than30 years, the FriedrichHazardgard has endured someofthe
toughest and most unforgiving operating conditions imaginable. Time-tested
in the eld where it counts, Hazardgard is trusted by professionals who have
to get the job done. Robust engineering withdesign details like 33%thicker
ns extend the life of the coil. Diamonblue
Technology, our anti-corrosive treatment,
provides added endurance andprotection
in coastal or corrosive environments.
Oshore oil rigs, on-shore oil company
ofces and reneries
Petrochemical sites and propane ll-up
stations
Paint and varnish storageor processing
plants
Grain alcohol processors or storage sites
Plant areas using strong solvents or
chemicals
Munitions plants or armories
PVC or plastics plants and processing
points
Recycling plants
Furniture renishing/stripping
workshops
Fertilizer plants
Ofce complexes where methane is a
by-product
Hazardous materials storage
Ideal applications
|HAZARDOUS DUTY |
Application
6
HAZARDGARD APPLICATION

SPECIFICATIONS AND PERFORMANCE DATA
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-410A REF.
Voltage
BREAKER
FUSE
Discharge
Air Temp. Drop F. Suction Discharge Amps Cool Amps Heat Locked Rotor Amps Charge in OZ. 60 Hertz Amps
SH15M30A 54 26 127 186 67 18 35 137 480 6.9 - 43 50 208 / 230 15
SH15M30A 54 26 185 124 68 15 38 137 485 9.1 - 43 42.7 208 / 230 15
7
Due to continuing engineering research and technology, specifications are subject to change without notice. Manufactured under U.S. Design Patent
DES 368, 306 decorative front; Utility Patent 5, 622, 058. MAXIMUM outdoor ambient operating temperature is 130°F. MAXIMUM TEMPERATURE
RATING FOR CLASS I, DIVISION 2, GROUPS A,B,C,D.
OPERATING TEMPERATURE CODE T3B
Specications
Installation Information
Model
Cooling Capacity Electrical Characteristics (60 Hertz)
Energy
Efciency
Ratio AHAM
Moisture
Removal
Air Direction
Controls
Room Side Air
Circulation
(BTU/Hr.- AHAM) Volts Rated Amps AHAM Watts EER (Pints/ Hr.) CFM
SH15M30A 14500/14000 230/208 6.9/7.4 1495/1443 9.7/9.7 6.0 8-way 375
SH20M30A 19500/19000 230/208 9.1/10.0 2074/2021 9.4/9.4 4.0 8-way 375
Model
Dimensions
(Inches) WindowWidth
(Inches)
Thru-The-Wall
Finished Hole (Inches)
Circuit Rating
Breaker or
T- D Fuse
Weight
(Lbs.)
Height Width
Depth
Overall
Depth J Box
to Louvers
Minimum
Extension
Into Room
Minimum
Extension
Outside Min.Max .Height Width Max. Depth Volts - Amps Net Shipping
SH15M30A 15 15/16 25 15/16 27 3/86 3 1/
16 16 15/16 27 7
/842 16 3/
16 26 3/ 16 6 250V - 15A 156 168
SH20M30A 17 15/16 25 15/16 27 3/86 3 1/
16 16 15/16 27 7
/842 18 3/
16 26 3/ 16 6 250V - 15A 160 174
(A)
Front
SIDE VIEW
(A)
Junction
Box
Max.
Wall
Depth
S TANDARD ON ALL MODEL S .
This advanced corrosion protection
treatment protects the outdoor coil
against deterioration and extends
the life of the unit especially in harsh
coastal environments.
All models use
environmentally
friendly R-410A
refrigerant.
R-410A
7

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
electrically 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
8

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 relay 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.
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
9