Rheem RGEA16 User manual

92-21916-79-01
SUPERSEDES 92-21916-79-00
PACKAGE GAS ELECTR C
FEATUR NG EARTH-FR ENDLY R-410A REFR GERANT
RGEA16 UP TO 16 SEER (2-5 TONS)
NSTALLAT ON NSTRUCT ONS
ISO 9001:2008
U.L. recognized fuel gas and CO (carbon monoxide) detectors are recommended in all
applications, and their installation should be in accordance with the manufacturer’s
recommendations and/or local laws, rules, regulations, or customs.
refrigerant
(14 SEER &
ABOVE)
Seasonal Energy Efficiency Ratio (SEER)
Annual Fuel Utilization Efficiency -
AFUE
HIGHMID
16.0
81.0%
RGEA16
THIS MODEL
10.6—
Uses least energy
➞
16.05
78% 82% 88% 97%

2
TABLE OF CONTENTS
I. Safety Information .................................................................................................3
II. Introduction............................................................................................................6
III. Checking Product Received..................................................................................6
IV. Specifications ........................................................................................................6
A. General .............................................................................................................6
B. Major Components............................................................................................6
C.R-410A Refrigerant ...........................................................................................6
D.Comfort Alert System........................................................................................7
1. Comfort Alert.................................................................................................7
2. High Pressure Control...................................................................................8
3. Low Pressure Control....................................................................................8
4. Comfort Alert With Active Protection.............................................................8
V. Unit Dimensions ..................................................................................................10
VI. Installation ...........................................................................................................12
A. General ...........................................................................................................12
1. Pre-Installation Check................................................................................12
2. Location Considerations.............................................................................12
B. Outside Installation..........................................................................................12
C.Attaching Exhaust and Combustion Air Inlet Hoods .......................................13
D.Cover Panel Installation/Conversion Procedure .............................................14
1. Horizontal to Downflow ...............................................................................14
2. Downflow to Horizontal ...............................................................................14
E. Clearances......................................................................................................14
. Rooftop Installation .........................................................................................16
G.Ductwork.........................................................................................................16
H.Return Air........................................................................................................18
I. ilters...............................................................................................................19
VII. Gas Supply, Condensate Drain and Piping.........................................................21
A. Gas Connection ..............................................................................................21
B. LP Conversion Two Stage Gas Heat..............................................................22
C.NOx Models ....................................................................................................22
D.Adjusting or Checking urnace Input..............................................................23
E. Condensate Drain...........................................................................................24
VIII. Wiring ..................................................................................................................24
A. Power Supply..................................................................................................24
B. Hook Up..........................................................................................................25
C.Internal Wiring.................................................................................................26
D.Thermostat......................................................................................................26
IX. urnace Section Controls and Ignition System ...................................................27
A. Normal urnace Operating Sequence Two Stage Gas Heat..........................27
B. Operating Instructions.....................................................................................28
C.Burners............................................................................................................29
D.Manual Reset Overtemperature Control .........................................................29
E. Pressure Switch..............................................................................................29
. Limit Control....................................................................................................29
X. System Operating Information.............................................................................29
A. Advise the Customer.......................................................................................29
B. urnace Section Maintenance ........................................................................30
C.Lubrication.......................................................................................................31
D.Cooling Section Maintenance .........................................................................31
E. Replacement Parts..........................................................................................32
. Charging..........................................................................................................32
XI. Units with ECM Blower Motors (RGEA16 Models Only) .....................................33
A. ECM Motor Interface Control and Settings (RGEA16 Units Only)..................33
B. Transformer Protection ...................................................................................34
C.Using the Onboard LED to Determine Blower C M........................................34
D.Unit Operation with Two-Stage Cooling..........................................................35
E. Cooling Airflow Adjustments ...........................................................................35
. Heating Airflow Adjustments...........................................................................38
G.Cooling Delay Profiles.....................................................................................38
H.Cooling Mode Dehumidification ......................................................................39
I. On Demand Dehumidification Airflow Adjustment ..........................................39
XII. General Data..................................................................................................41-44
XIII. Miscellaneous......................................................................................................45
XIV. Airflow Performance Data....................................................................................46
XV. Wiring Diagrams.............................................................................................47-48
XVI. Charge Charts................................................................................................49-56
XVII. Troubleshooting..............................................................................................57-58
XVIII. Comfort Alert Diagnostic Chart............................................................................59

I. SAFETY INFORMATION
3
!WARNING
THE MANUFACTURER’S WARRANTY DOES NOT COVER ANY DAMAGE OR
DEFECT TO THE A R COND T ONER CAUSED BY THE ATTACHMENT OR USE
OF ANY COMPONENTS, ACCESSOR ES OR DEV CES (OTHER THAN THOSE
AUTHOR ZED BY THE MANUFACTURER) NTO, ONTO OR N CONJUNCT ON
W TH THE A R COND T ONER. YOU SHOULD BE AWARE THAT THE USE OF
UNAUTHOR ZED COMPONENTS, ACCESSOR ES OR DEV CES MAY
ADVERSELY AFFECT THE OPERAT ON OF THE A R COND T ONER AND MAY
ALSO ENDANGER L FE AND PROPERTY. THE MANUFACTURER D SCLA MS
ANY RESPONS B L TY FOR SUCH LOSS OR NJURY RESULT NG FROM THE
USE OF SUCH UNAUTHOR ZED COMPONENTS, ACCESSOR ES OR DEV CES.
!WARNING
UN TS ARE NOT DES GN CERT F ED TO BE NSTALLED NS DE THE STRUC-
TURE. DO NG SO CAN CAUSE NADEQUATE UN T PERFORMANCE AS WELL
AS PROPERTY DAMAGE AND CARBON MONOX DE PO SON NG RESULT NG
N PERSONAL NJURY OR DEATH.
!WARNING
D SCONNECT ALL POWER TO UN T BEFORE START NG MA NTENANCE.
FA LURE TO DO SO CAN CAUSE ELECTR CAL SHOCK RESULT NG N PER-
SONAL NJURY OR DEATH.
!WARNING
THESE UN TS ARE DES GNED CERT F ED FOR OUTDOOR NSTALLAT ON
ONLY. NSTALLAT ON NS DE ANY PART OF A STRUCTURE CAN RESULT N
NADEQUATE UN T PERFORMANCE AS WELL AS PROPERTY DAMAGE.
NSTALLAT ON NS DE CAN ALSO CAUSE REC RCULAT ON OF FLUE PROD-
UCTS NTO THE COND T ONED SPACE RESULT NG N PERSONAL NJURY
OR DEATH.
!WARNING
TH S UN T MUST NOT BE NSTALLED D RECTLY ON WOOD FLOOR NG, CLASS
A, CLASS B OR CLASS C ROOF COVER NG MATER ALS, OR ANY OTHER COM-
BUST BLE STRUCTURE EXCEPT AS SPEC F ED N F GURE 15. FA LURE TO
ADHERE TO TH S WARN NG CAN CAUSE A F RE OR EXPLOS ON RESULT NG
N PROPERTY DAMAGE, PERSONAL NJURY OR DEATH.
!WARNING
DO NOT, UNDER ANY C RCUMSTANCES, CONNECT RETURN DUCTWORK TO
ANY OTHER HEAT PRODUC NG DEV CE SUCH AS F REPLACE NSERT,
STOVE, ETC. UNAUTHOR ZED USE OF SUCH DEV CES MAY RESULT N F RE,
CARBON MONOX DE PO SON NG, EXPLOS ON, PERSONAL NJURY, OR
PROPERTY DAMAGE.
!WARNING
PROPOS T ON 65: TH S FURNACE CONTA NS F BERGLASS NSULAT ON.
RESP RABLE PART CLES OF F BERGLASS ARE KNOWN TO THE STATE OF
CAL FORN A TO CAUSE CANCER. EXHAUST GAS FROM TH S FURNACE
CONTA NS CHEM CALS, NCLUD NG CARBON MONOX DE, KNOWN TO THE
STATE OF CAL FORN A TO CAUSE B RTH DEFECTS OR OTHER REPRODUC-
T VE HARM.

!WARNING
NEVER ALLOW PRODUCTS OF COMBUST ON OR THE FLUE PRODUCTS TO
ENTER THE RETURN A R DUCTWORK, OR THE C RCULAT NG A R SUPPLY.
ALL RETURN DUCTWORK MUST BE ADEQUATELY SEALED AND SECURED
TO THE FURNACE W TH SHEET METAL SCREWS, AND JO NTS TAPED. ALL
OTHER DUCT JO NTS MUST BE SECURED W TH APPROVED CONNECT ONS
AND SEALED A RT GHT.
FA LURE TO PREVENT PRODUCTS OF COMBUST ON FROM BE NG C RCU-
LATED NTO THE L V NG SPACE CAN CREATE POTENT ALLY HAZARDOUS
COND T ONS, NCLUD NG CAROBON MONOX DE PO SON NG THAT COULD
RESULT N PERSONAL NJURY OR DEATH.
!WARNING
DO NOT USE AN OPEN FLAME TO CHECK FOR LEAKS. THE USE OF AN OPEN
FLAME CAN RESULT N F RE, EXPLOS ON, PROPERTY DAMAGE, PERSONAL
NJURY OR DEATH.
!WARNING
TH S UN T S EQU PPED AT THE FACTORY FOR USE ON NATURAL GAS ONLY.
CONVERS ON TO LP GAS REQU RES A SPEC AL K T SUPPL ED BY THE D S-
TR BUTOR OR MANUFACTURER. MA L NG ADDRESSES ARE L STED ON THE
FURNACE RAT NG PLATE, PARTS L ST AND WARRANTY. FA LURE TO USE
THE PROPER CONVERS ON K T CAN CAUSE F RE, CARBON MONOX DE PO -
SON NG, EXPLOS ON, PERSONAL NJURY, PROPERTY DAMAGE OR DEATH.
!WARNING
TURN OFF THE MA N ELECTR CAL POWER AT THE BRANCH C RCU T D SCON-
NECT CLOSEST TO THE UN T BEFORE ATTEMPT NG ANY W R NG. FA LURE
TO DO SO CAN CAUSE ELECTR CAL SHOCK RESULT NG N PERSONAL
NJURY OR DEATH.
!WARNING
DO NOT ATTEMPT TO MANUALLY L GHT TH S FURNACE W TH A MATCH OR
ANY OPEN FLAME. ATTEMPT NG TO DO SO CAN CAUSE AN EXPLOS ON OR
F RE RESULT NG N PROPERTY DAMAGE, PERSONAL NJURY OR DEATH.
!WARNING
F YOU DO NOT FOLLOW THESE NSTRUCT ONS EXACTLY, A F RE OR
EXPLOS ON MAY RESULT CAUS NG PROPERTY DAMAGE, PERSONAL
NJURY OR LOSS OF L FE.
!WARNING
THE SPARK GN TOR AND GN T ON LEAD FROM THE GN T ON CONTROL
ARE H GH VOLTAGE. KEEP HANDS OR TOOLS AWAY TO PREVENT ELEC-
TR CAL SHOCK. SHUT OFF ELECTR CAL POWER BEFORE SERV C NG ANY
OF THE CONTROLS. FA LURE TO ADHERE TO TH S WARN NG CAN RESULT
N PERSONAL NJURY OR DEATH.
!WARNING
SHOULD OVERHEAT NG OCCUR OR THE GAS SUPPLY FA L TO SHUT OFF,
SHUT OFF THE MANUAL GAS VALVE TO THE APPL ANCE BEFORE SHUT-
T NG OFF THE ELECTR CAL SUPPLY. FA LURE TO DO SO CAN RESULT N
AN EXPLOS ON OR F RE CAUS NG PROPERTY DAMAGE, SEVERE PERSON-
AL NJURY OR DEATH!
4

!WARNING
DO NOT JUMPER TH S DEV CE! DO NOT reset the overtemperature control
without taking corrective action to assure that an adequate supply of combus-
tion air is maintained under all conditions of operation. Failure to do so can
result in carbon monoxide poisoning or death. Replace this control only with
the identical replacement part.
!WARNING
HOLES N THE EXHAUST TRANS T ON OR HEAT EXCHANGER CAN CAUSE
TOX C FUMES TO ENTER THE HOME. THE EXHAUST TRANS T ON OR HEAT
EXCHANGER MUST BE REPLACED F THEY HAVE HOLES OR CRACKS N
THEM. FA LURE TO DO SO CAN CAUSE CARBON MONOX DE PO SON NG
RESULT NG N PERSONAL NJURY OR DEATH.
!WARNING
D SCONNECT MA N ELECTR CAL POWER TO THE UN T BEFORE ATTEMPT-
NG MA NTENANCE. FA LURE TO DO SO MAY RESULT N ELECTR CAL
SHOCK OR SEVERE PERSONAL NJURY OR DEATH.
!WARNING
LABEL ALL W RES PR OR TO D SCONNECT ON WHEN SERV C NG CON-
TROLS. W R NG ERRORS CAN CAUSE MPROPER AND DANGEROUS OPER-
AT ON RESULT NG N F RE, ELECTR CAL SHOCK, PROPERTY DAMAGE, PER-
SONAL NJURY OR DEATH.
!WARNING
LABEL ALL W RES PR OR TO D SCONNECT ON WHEN SERV C NG THE UN T.
W R NG ERRORS CAN CAUSE MPROPER AND DANGEROUS OPERAT ON
RESULT NG N F RE, ELECTR CAL SHOCK, PROPERTY DAMAGE, SEVERE
PERSONAL NJURY OR DEATH.
!WARNING
D SCONNECT MA N ELECTR CAL POWER TO THE UN T BEFORE ATTEMPT-
NG TO CHANGE BLOWER SPEEDS. FA LURE TO DO SO MAY RESULT N
ELECTR CAL SHOCK OR SEVERE PERSONAL NJURY OR DEATH.
!WARNING
D SCONNECT ALL POWER TO UN T BEFORE SERV C NG. CONTACTOR MAY
BREAK ONLY ONE S DE. FA LURE TO SHUT OFF POWER CAN CAUSE ELEC-
TR CAL SHOCK RESULT NG N PERSONAL NJURY OR DEATH.
!
CAUTION
R-410A systems operate at higher pressures than R-22 systems. Do not use
R-22 service equipment or components on R-410A equipment.
5

6
II. INTRODUCTION
This booklet contains the installation and operating instructions for your combination gas
heating/electric cooling unit. There are some precautions that should be taken to derive
maximum satisfaction from it. Improper installation can result in unsatisfactory operation
or dangerous conditions.
Read this booklet and any instructions packaged with separate equipment required to
make up the system prior to installation. Give this booklet to the owner and explain its
provisions. The owner should retain this booklet for future reference.
III. CHECKING PRODUCT RECEIVED
Upon receiving the unit, inspect it for any damage from shipment. Claims for damage,
either shipping or concealed, should be filed immediately with the shipping company.
MPORTANT: Check the unit model number, heating size, electrical characteristics, and
accessories to determine if they are correct.
IV. SPECIFICATIONS
A. GENERAL
The Combination Gas Heating/Electric Cooling Rooftop is available in 60, 80 and 100
BTU/Hr. heating inputs and cooling capacities of 2, 3, 4 and 5 nominal tons of cooling.
Units are convertible from end supply and return to bottom supply and return by reloca-
tion of supply and return air access panels. See cover installation detail.
The units are weatherized for mounting outside of the building.
The information on the rating plate is in compliance with the TC and DOE rating for sin-
gle phase units. The following information is for three phase units which are not covered
under the DOE certification program.
1. The energy consumption of the ignition system used with this unit is 9 watts.
2. The efficiency rating of this unit is a product thermal efficiency rating determined
under continuous operating conditions independent of any installed system.
B. MAJOR COMPONENTS
The unit includes a hermetically-sealed refrigerating system (consisting of a compressor,
condenser coil, evaporator coil with thermostatic expansion valve), a circulation air blow-
er, a condenser fan, a heat exchanger assembly, gas burner and control assembly,
combustion air motor and fan, and all necessary internal electrical wiring. The cooling
system of these units is factory-evacuated, charged with R-410A refrigerant and perfor-
mance tested. Refrigerant amount is indicated on rating plate.
C. R410A REFRIGERANT
All units are factory charged with R-410A refrigerant.
1. Specification of R-410A:
Application: R-410A is not a drop-in replacement for R-22; equipment designs must
accommodate its higher pressures. It cannot be retrofitted into R-22 units.
Pressure: The pressure of R-410A is approximately 60% (1.6 times) greater than R-
22. Recovery and recycle equipment, pumps, hoses and the like need to have design
pressure ratings appropriate for R-410A. Manifold sets need to range up to 800 psig
high-side and 250 psig low-side with a 550 psig low-side retard. Hoses need to have a
service pressure rating of 800 psig. Recovery cylinders need to have a 400 psig service
pressure rating. DOT 4BA400 or DOT BW400.
Combustibility: At pressures above 1 atmosphere, mixture of R-410A and air can
become combustible. R-410A and air should never be mixed in tanks or supply
lines, or be allowed to accumulate in storage tanks. Leak checking should never
be done with a mixture of R-410A and air. Leak checking can be performed safely
with nitrogen or a mixture of R-410A and nitrogen.
!WARNING
MPORTANT: ALL MANUFACTUR-
ER PRODUCTS MEET CURRENT
FEDERAL OSHA GU DEL NES FOR
SAFETY. CAL FORN A
PROPOS T ON 65 WARN NGS ARE
REQU RED FOR CERTA N PROD-
UCTS, WH CH ARE NOT COVERED
BY THE OSHA STANDARDS.
CAL FORN A'S PROPOS T ON 65
REQU RES WARN NGS FOR PROD-
UCTS SOLD N CAL FORN A THAT
CONTA N, OR PRODUCE, ANY OF
OVER 600 L STED CHEM CALS
KNOWN TO THE STATE OF
CAL FORN A TO CAUSE CANCER
OR B RTH DEFECTS SUCH AS
F BERGLASS NSULAT ON, LEAD
N BRASS, AND COMBUST ON
PRODUCTS FROM NATURAL GAS.
ALL “NEW EQU PMENT” SH PPED
FOR SALE N CAL FORN A W LL
HAVE LABELS STAT NG THAT THE
PRODUCT CONTA NS AND/OR
PRODUCES PROPOS T ON 65
CHEM CALS. ALTHOUGH WE HAVE
NOT CHANGED OUR PROCESSES,
HAV NG THE SAME LABEL ON ALL
OUR PRODUCTS FAC L TATES
MANUFACTUR NG AND SH PP NG.
WE CANNOT ALWAYS KNOW
“WHEN, OR F” PRODUCTS W LL
BE SOLD N THE CAL FORN A
MARKET.
YOU MAY RECE VE NQU R ES
FROM CUSTOMERS ABOUT CHEM -
CALS FOUND N, OR PRODUCED
BY, SOME OF OUR HEAT NG AND
A R-COND T ON NG EQU PMENT,
OR FOUND N NATURAL GAS USED
W TH SOME OF OUR PRODUCTS.
L STED BELOW ARE THOSE CHEM-
CALS AND SUBSTANCES COM-
MONLY ASSOC ATED W TH S M -
LAR EQU PMENT N OUR NDUS-
TRY AND OTHER MANUFACTUR-
ERS.
• GLASS WOOL (F BERGLASS)
NSULAT ON
• CARBON MONOX DE (CO)
• FORMALDEHYDE
• BENZENE
MORE DETA LS ARE AVA LABLE
AT THE WEBS TES FOR OSHA
(OCCUPAT ONAL SAFETY AND
HEALTH ADM N STRAT ON), AT
WWW.OSHA.GOV AND THE STATE
OF CAL FORN A'S OEHHA (OFF CE
OF ENV RONMENTAL HEALTH
HAZARD ASSESSMENT), AT
WWW.OEHHA.ORG. CONSUMER
EDUCAT ON S MPORTANT S NCE
THE CHEM CALS AND SUB-
STANCES ON THE L ST ARE
FOUND N OUR DA LY L VES. MOST
CONSUMERS ARE AWARE THAT
PRODUCTS PRESENT SAFETY AND
HEALTH R SKS, WHEN MPROPER-
LY USED, HANDLED AND MA N-
TA NED.
!WARNING
UN TS ARE NOT DES GN CERT F ED TO BE NSTALLED NS DE THE STRUC-
TURE. DO NG SO CAN CAUSE NADEQUATE UN T PERFORMANCE AS WELL
AS PROPERTY DAMAGE AND CARBON MONOX DE PO SON NG RESULT NG
N PERSONAL NJURY OR DEATH.

2. Quick Reference Guide For R-410A
• R-410A refrigerant operates at approximately 60% higher pressure (1.6 times) than R-
22. Ensure that servicing equipment is designed to operate with R-410A.
• R-410A refrigerant cylinders are pink.
• R-410A, as with other H C’s is only compatible with POE oils.
• Vacuum pumps will not remove moisture from POE oil.
• R-410A systems are to be charged with liquid refrigerants. Prior to March 1999, R-
410A refrigerant cylinders had a dip tube. These cylinders should be kept upright for
equipment charging. Post March 1999 cylinders do not have a dip tube and should
be inverted to ensure liquid charging of the equipment.
• Do not install a suction line filter drier in the liquid line.
• A liquid line filter drier is standard on every unit.
• Desiccant (drying agent) must be compatible for POE oils and R-410A
3. Evaporator Coil / TXV
The thermostatic expansion valve is specifically designed to operate with R-410A. DO
NOT use an R-22 TXV. The existing evaporator must be replaced with the factory
specified TXV evaporator specifically designed for R-410A.
4. Tools Required For Installing & Servicing R-410A Models
Manifold Sets:
-Up to 800 PSIG High side
-Up to 250 PSIG Low Side
-550 PSIG Low Side Retard
Manifold Hoses:
-Service Pressure Rating of 800 PSIG
Recovery Cylinders:
-400 PSIG Pressure Rating
-Dept. of Transportation 4BA400 or BW400
D. COMFORT ALERT™ SYSTEM (2-STAGE MODELS ONLY)
1. Comfort Alert™
The Comfort Alert™ diagnostics module is for troubleshooting air conditioning sys-
tem failures. By monitoring and analyzing data from the compressor and the ther-
mostat demand, the module can accurately detect the cause of electrical and sys-
tem-related failures without any external sensors. A flashing LED indicator commu-
nicates the ALERT code and guides the service technician more quickly and accu-
rately to the root cause of a problem.
POWER LED (Green): indicates voltage is present at the power connection of the
module.
ALERT LED (Yellow): communicates an abnormal system condition through a
unique flash code. The ALERT LED will flash a number of times consecutively,
pause and then repeat the process. The number of consecutive flashes, defined
as the lash Code, correlates to a particular abnormal condition. Detailed
descriptions of specific ALERT lash Codes are shown in the Comfort Alert
Diagnosis Chart in this manual.
TR P LED (Red): indicates there is a demand signal from the thermostat but no
current to the compressor is detected by the module. The TRIP LED typically
indicates the compressor internal overload protector is open or may indicate
missing high voltage supply power to the compressor.
When an abnormal system condition occurs, the Comfort Alert module displays the
appropriate ALERT and/or TRIP LED. The yellow ALERT LED will flash a number
!
CAUTION
R-410A systems operate at higher pressures than R-22 systems. Do not use
R-22 service equipment or components on R-410A equipment.
F GURE 1
LED DESCR PT ON
7

of times consecutively, pause and then repeat the process. To identify a lash
Code number, count the number of consecutive flashes.
MPORTANT: Every time the module powers up, the last ALERT lash Code that
occurred prior to shut down is displayed for one minute. The module will continue to
display the flash code until the condition returns to normal or if 24VAC power is
removed from the module.
The control box cover allows access to the Comfort Alert™ status LEDs. An abbre-
viated Comfort Alert™ diagnostic chart is provided on the control box cover.
2. High Pressure Control (HPC)
The high pressure control (HPC) keeps the compressor from operating in pressure
ranges, which can cause damage to the compressor. This is an auto-reset control that
opens near 610 PSIG and closes once the system pressure drops below 420 PSIG.
The high pressure control is wired in the 24VAC side of the control circuitry.
3. Low Pressure Control (LPC)
The low pressure control (LPC) keeps the compressor from operating in pressure
ranges that can cause damage to the compressor. This is an auto-reset control that
opens near 90 PSIG and closes once the system pressure rises above 135 PSIG.
The low pressure control is wired in the common side of the control circuitry.
. Comfort Alert With Active Protection
A two-stage cooling thermostat is required for proper unit operation.
Manufacturer recommends the use of thermostats that provide active compressor pro-
tection via the L terminal when the Comfort-Alert module on the unit is connected to the
L terminal on the thermostat.
The Comfort Alert diagnostics module diagnoses system and electrical problems in
the air conditioning system. Abnormal conditions are indicated by flashing
ALERT codes on the yellow LED on the Comfort Alert module. The flash codes are
transmitted to the thermostat when the Lterminal on the Comfort Alert Module is
connected to the Lterminal on the thermostat. The compatible thermostat displays a
CHECK SYSTEM icon that flashes at the same rate as the yellow ALERT LED on the
Comfort Alert module.
NOTE: The Comfort Alert™ module does not provide safety protection! It does not dis-
connect power from the unit.
Comfort Alert™ lash Codes
1 – Long Run Time
2 – System Pressure Trip
3 – Short Cycling
4 – Locked Rotor
5 – Open Circuit
6 – Open Start Circuit (single phase) – missing phase (3-phase)
7 – Open Run Circuit (single phase) – reverse phase (3-phase)
8 – Welded Contactor
9 – Low Voltage
See igures 42 and 43 (Comfort Alert Diagnostic Charts) for more troubleshooting infor-
mation.
F GURE 2
8

Active protection occurs under the following conditions:
1) lash Code 2 - System Pressure Trip
Condition: our consecutive compressor protector trips occur where the
average run time until trip is between 1 minute and 15 minutes
Possible causes:
Low suction pressure
• Low pressure switch is open
• Low system charge
Blocked condenser coil
Restricted condenser air flow
Active Thermostat Reaction:
The thermostat will cycle the system ON for 5 minutes and O for
five minutes to verify system fault. If this ON/O cycling repeats for
30 ten-minute cycles, the thermostat concludes there is a system
problem and implements a hard lockout.
2) lash Code 3 - Short Cycling
Condition: A pattern of short cycling emerges where the run time for the
previous four cycles is less than three minutes each.
Possible causes:
High head pressure
• High pressure switch is open
• System overcharged
• Non-condensables in system
aulty thermostat
Intermittent contactor
Active Thermostat Reaction:
The thermostat will cycle the system ON for 5 minutes and O for
five minutes to verify the system fault. If this ON/O cycling repeats for
30 ten-minute cycles, the thermostat concludes there is a system
problem and implements a hard lockout.
3) lash Code 4 - Locked Rotor
Condition: The compressor internal overload trips where the average run
time is less than 15 seconds.
Possible causes:
Bad run capacitor
Low line voltage
Excessive liquid refrigerant in compressor
Compressor bearings are seized
aulty hard start components
Active Thermostat Reaction:
The thermostat implements a hard lockout once this error is sensed.
4) lash Code 6 - Open Start Circuit
Condition: Current is detected in the run circuit but not in the start circuit.
Possible causes:
Bad run capacitor
Open circuit in compressor start wiring or connections.
Compressor start winding is damaged
Active thermostat reaction:
The thermostat implements a hard lockout after 3 hours.
5) lash Code 7 - Open Run Circuit
Condition: Open circuit in compressor run wiring or connections.
Compressor run winding is damaged.
Active Thermostat Reaction:
The thermostat implements a hard lockout after 3 hours.
9

V. UNIT DIMENSIONS
FOR CLEARANCES
SEE FIGURE 3.
OUTDOOR COIL
PROTECTIVE GRILLE
OUTDOOR AN GRILLE
AND COMPRESSOR ACCESS
IELD CONTROL
WIRE ENTRANCE
LUE EXHAUST
HOOD
COMBUSTION AIR
INLET HOOD
BOTTOM
RETURN
DUCT
OPENING
BOTTOM
SUPPLY
DUCT
OPENING
OUTDOOR AN
GRILLE & COMPRESSOR
ACCESS
BLOWER/EVAPORATOR
ACCESS PANEL SIDE SUPPLY DUCT
OPENING
SIDE
RETURN
DUCT
OPENING
LUE
EXHAUST
IELD POWER
WIRE ENTRANCE
LIQUID PRESSURE
SERVICE PORT
THREADED
PVC CONDENSATE
DRAIN CONNECTION
(3/4 NPT)
SUCTION PRESSURE
SERVICE PORT
TOP V EW BOTTOM V EW
F GURE 3
479⁄16”
5013⁄16”
313⁄16”49⁄10”
33⁄16”
497⁄16”
INSIDE
11⁄2”
TYP.
141⁄4”
TYP.
13⁄16”
TYP.
451⁄16”
INSIDE
191⁄2”153⁄8”
30% ± 2%
29% ± 2%
20% ± 2%
21% ± 2%
CORNER WEIGHTS
% O TOTAL UNIT
WEIGHT
10

11
ILTER ACCESS PANEL
( OR UNIT MOUNTED ILTER
ACCESSORY)
SIDE
SUPPLY
DUCT
OPENING
SIDE
RETURN
DUCT
OPENING
OUTDOOR
COIL PROTECTIVE
GRILLE
LUE
EXHAUST
HOOD
GAS
SUPPLY
ENTRANCE
BLOWER/
EVAPORATOR
ACCESS PANEL
S DE V EW
FRONT V EW BACK V EW
S DE V EW
F GURE 3 (CONT NUED)
“A”
HE GHT
SHOWN WITH DUCT COVERS REMOVED.
207⁄8”
227⁄8”
1315⁄16”
75⁄16”
2211⁄16”
471⁄2”
3515⁄16”
39⁄16”
3515⁄16”
131⁄4”
21⁄2”
47⁄16”
81⁄2”
TYP.
143⁄16”
TYP.
133⁄4”
TYP.
47⁄8”
191⁄8”
15”
41
1015⁄16”
111⁄16”
527⁄16”
MODEL
RGEA16
024
036, 048,
060

12
VI. INSTALLATION
A. GENERAL
1. PRE-INSTALLATION CHECK-POINTS — Before attempting any installation, care-
fully consider the following points:
Structural strength of supporting members
(Rooftop Installation)
Clearances and provision for servicing
Power supply and wiring
Gas supply and piping
Air duct connections and sizing
Drain facilities and connections
Location for minimum noise and vibration
2. LOCATION CONSIDERATIONS (CORROSIVE ENVIRONMENT)
The metal parts of this unit may be subject to rust or deterioration if exposed to a
corrosive environment. This oxidation could shorten the equipment’s useful life.
Corrosive elements include, but are not limited to, salt spray, fog or mist in seacoast
areas, sulphur or chlorine from lawn watering systems, and various chemical conta-
minants from industries such as paper mills and petroleum refineries.
f the unit is to be installed in an area where contaminants are likely to be a
problem, give special attention to the equipment location and exposure.
1. Avoid having lawn sprinkler heads spray directly on the unit cabinet.
2. In coastal areas locate the unit on the side of the building away from the water-
front.
3. Shielding by a fence or shrubs may give some protection.
1. requent washing of the cabinet, fan blade and coil with fresh water will remove
most of the salt or other contaminants that build up on the unit.
2. Regular cleaning and waxing of the cabinet with a good automobile polish will pro-
vide some protection.
3. Use a good liquid cleaner several times a year to remove matter that will not wash
off with water.
Several different types of protective coatings are offered in some areas. These coatings
may provide some benefit, but the effectiveness of such coating materials cannot be ver-
ified by the equipment manufacturer.
The best protection is frequent cleaning, maintenance and minimal exposure to
contaminants.
B. OUTSIDE INSTALLATION
(Typical outdoor slab installation is shown in igure 4.)
1. Select a location where external water drainage cannot collect around unit.
!WARNING
D SCONNECT ALL POWER TO UN T BEFORE START NG MA NTENANCE.
FA LURE TO DO SO CAN CAUSE ELECTR CAL SHOCK RESULT NG N PER-
SONAL NJURY OR DEATH.
!WARNING
THESE UN TS ARE DES GNED CERT F ED FOR OUTDOOR NSTALLAT ON
ONLY. NSTALLAT ON NS DE ANY PART OF A STRUCTURE CAN RESULT N
NADEQUATE UN T PERFORMANCE AS WELL AS PROPERTY DAMAGE.
NSTALLAT ON NS DE CAN ALSO CAUSE REC RCULAT ON OF FLUE PROD-
UCTS NTO THE COND T ONED SPACE RESULT NG N PERSONAL NJURY
OR DEATH.

13
2. Provide a slab sufficiently high enough above grade to prevent surface water from
entering the unit. Where snowfall is anticipated, mount the unit above the anticipat-
ed maximum snow depth for your area. Do not locate unit in an area where exces-
sive snow drifting may block combustion air inlet.
3. Pitch the slab approximately 1⁄2” so that the unit will be pitched toward the drain. See
igure 5.
4. The location of the unit should be such as to provide proper access for inspection
and servicing as shown in igure 11.
5. Locate unit where operating sounds will not disturb owner or neighbors. The slab
should be isolated from the foundation wall.
6. Locate unit so roof runoff water does not pour directly on the unit. Provide gutter or
other shielding at roof level.
C. ATTACHING EXHAUST AND COMBUSTION AIR INLET HOODS
MPORTANT: Do not operate this unit without the exhaust and combustion air inlet
hood properly installed. These hoods are shipped in a carton in the return air compart-
ment inside the unit and must be attached when the unit is installed. See Figure 6.
To attach exhaust and combustion air inlet hood:
1. Remove 3 screws securing filter access panel and remove filter access panel. or loca-
tion of filter access panel, see igure 3.
2. Remove both exhaust and combustion air inlet hoods from their carton, located inside
the return air compartment.
3. Attach filter access panel.
4. Attach the combustion air inlet hood and the exhaust hood each with 4 screws as shown
in igure 6. Screws are in parts bag shipped in the burner compartment.
5. Vent the unit using the flue exhaust hood, as supplied from the factory, without alteration
or addition. The only exception is with factory approved additions. Consult your local util-
ity or other authority having jurisdiction for accepted venting techniques.
F GURE 4
OUTS DE SLAB NSTALLAT ON. CLOSET D STR BUT ON SYSTEM. SLAB FLOOR
CONSTRUCT ON

14
D. COVER PANEL INSTALLATION/CONVERSION PROCEDURE
1. HORIZONTAL TO DOWN LOW
a. Remove screws and covers from the supply and return bottom sections. NOTE:
Rotate the supply cover 90° and remove.
b. Install gasket (supplied with parts bag) around perimeter of cover on the insulated
side. See igure 8.
c. Secure covers to the side of the unit using existing screws and those supplied in
the parts bag.
2. DOWN LOW TO HORIZONTAL
a. Remove screws and covers from the supply and return bottom sections.
b. Install gasket (supplied with parts bag) around perimeter of cover as illustrated in
igure 7.
c. Install covers in the unit bottom with the insulated side up. NOTE: Supply cover
must be inserted through supply opening with narrow side toward unit. Once
cover is through opening, rotate 90° and slip back flange of cover under tab at the
back of bottom duct opening. See igure 10.
d. Secure supply cover to base of unit with 2 screws, engaging prepunched holes in
raised duct opening flange.
e. Secure return covers to base of unit with screws engaging prepunched holes in
raised duct opening flange.
E.CLEARANCES
The following minimum clearances must be observed for proper unit performance and
serviceability. See igure 11.
1. Provide 48” minimum clearance at front of the unit. Provide 24” minimum clearance
on right side of unit. If economizer is used, a 24” minimum clearance is required on
EXHAUST
HOOD W/(4)
SCREWS
COMBUSTION
AIR INLET
HOOD W/(4)
SCREWS
!WARNING
TH S UN T MUST NOT BE NSTALLED D RECTLY ON WOOD FLOOR NG, CLASS
A, CLASS B OR CLASS C ROOF COVER NG MATER ALS, OR ANY OTHER COM-
BUST BLE STRUCTURE EXCEPT AS SPEC F ED N F GURE 15. FA LURE TO
ADHERE TO TH S WARN NG CAN CAUSE A F RE OR EXPLOS ON RESULT NG
N PROPERTY DAMAGE, PERSONAL NJURY OR DEATH.
F GURE 5
P TCH NG UN T TO NSURE PROPER CONDENSATE DRA NAGE.
I655
F GURE 6
COMBUST ON A R NLET HOOD & EXHAUST HOOD
NSTALLAT ON

15
FIGURE 5
COVER GASKET DETAIL FOR UNITS SHIPPED FOR DOWNFLOW
APPLICATION BEING CONVERTED TO SIDE DISCHARGE
TAPE
AROUND FLANGE
SUPPLY/RETURN
AIR COVER
R
FIGURE 6
COVER GASKET DETAIL FOR UNITS SHIPPED FOR SIDE DISCHARGE
APPLICATION BEING CONVERTED TO DOWNFLOW
TAPE
AROUND FLANGE
SUPPLY/RETURN
AIR COVER
I654
FIGURE 7
DUCT COVER INSTALLATION SIDE MOUNTING
I264
RETURN
DUCT COVER
(ATTACH WITH 6 SCREWS)
SUPPLY
DUCT COVER
(ATTACH WITH 6 SCREWS)
I
FIGURE 8
DUCT COVER INSTALLATION BASE PAN MOUNTING
I265
BASE PAN
SUPPLY DUCT
COVER
*
(INSULATION
SIDE UP),
ATTACH WITH
TWO SCREWS.
RETURN
DUCT
COVER
(INSULATION
SIDE UP,
ATTACH
WITH 4
SCREWS)
SUPPLY DUCT
COVER
* ROTATE SUPPLY COVER 90°AFTER IT IS INSERTED
THROUGH OPENING. SLIP FLANGE OF COVER
UNDER LANCE AT BACK OF BOTTOM SUPPLY DUCT
OPENING. SEE DETAIL AT LEFT. THEN SECURE
COVER BY INSTALLING 2 SCREWS USING HOLE
NEAREST THE OUTSIDE OF UNIT.
LANCE AT BACK OF BOTTOM
SUPPLY DUCT OPENING
F GURE 7
COVER GASKET DETA L FOR UN TS SH PPED FOR DOWNFLOW
APPL CAT ON BE NG CONVERTED TO S DE D SCHARGE
F GURE 8
COVER GASKET DETA L FOR UN TS SH PPED FOR S DE D SCHARGE
APPL CAT ON BE NG CONVERTED TO DOWNFLOW
F GURE 9
DUCT COVER NSTALLAT ON S DE MOUNT NG
F GURE 10
DUCT COVER NSTALLAT ON BASE PAN MOUNT NG

16
left side of unit. (See igure 11.) If no economizer is required, then a 12” clearance
is required on left side of unit.
2. Provide 60” minimum clearance between top of unit and maximum 3 foot overhang.
3. Unit is design certified for 2” minimum clearance between supply duct and a com-
bustible structure for the first 3 feet of duct. 0” clearance is allowed after 3 feet.
F. ROOFTOP INSTALLATION
1. Before locating the unit on the roof, make sure that the roof structure is adequate to
support the weight involved. (See electrical & physical tables in this book for weight
of unit.) TH S S VERY MPORTANT AND THE NSTALLER’S RESPONS B L TY.
2. or rigging and roofcurb details, see igures 16, 17, and 18.
3. The location of the unit on the roof should be such as to provide proper access for
inspection and servicing.
IMPORTANT: If unit will not be put into service immediately, block off supply and return
air openings to prevent excessive condensation.
G. DUCTWORK
The installing contractor should fabricate ductwork in accordance with local codes. Use
industry manuals as a guide when sizing and designing the duct system. Contact Air
Conditioning Contractors of America, 1513 16th St. N.W., Washington, D.C. 20036.
!WARNING
DO NOT, UNDER ANY C RCUMSTANCES, CONNECT RETURN DUCTWORK TO
ANY OTHER HEAT PRODUC NG DEV CE SUCH AS F REPLACE NSERT,
STOVE, ETC. UNAUTHOR ZED USE OF SUCH DEV CES MAY RESULT N F RE,
CARBON MONOX DE PO SON NG, EXPLOS ON, PERSONAL NJURY, OR
PROPERTY DAMAGE.
F GURE 11
CLEARANCES

FIGURE 10
EXCEPTION TO NON-COMBUSTIBLE FLOORING REQUIREMENT
I458
BOTH ENDS
MUST BE
OPEN FOR
DOWNFLOW
OR SIDEFLOW
DUCTWORK
TO PROVIDE
VENTILATION
COMBUSTIBLE
STRUCTURE
1” MIN.
NOMINAL
4 x 4 TIMBER
(SIDES ONLY)
SIDEFLOW
SUPPLY
PLENUM
CONNECTION
SUPPLY
PLENUM
(DOWNFLOW) RETURN PLENUM
(DOWNFLOW)
SIDEFLOW
RETURN PLENUM
CONNECTION
3-1/2” MIN.
F GURE 12
EXCEPT ON TO NON-COMBUST BLE FLOOR NG REQU REMENT
F GURE 13
FLAT ROOFTOP NSTALLAT ON, ATT C OR DROP CE L NG D STR BUT NG SYSTEM. MOUNTED ON
ROOFCURB, P TCH UN T TOWARD DRA N.
F GURE 14
P TCHED ROOFTOP NSTALLAT ON, ON ANGLE- RON STAND, S DE FLOW DUCTWORK,
ATT C OR DROP CE L NG
D STR BUT NG SYSTEM.
P TCH UN T TOWARD DRA N.
17

18
Place the unit as close to the conditioned space as possible allowing clearances as indi-
cated. Run ducts as directly as possible to supply and return outlets. Use of non-flam-
mable weatherproof flexible connectors on both supply and return connections at unit to
reduce noise transmission is recommended.
On ductwork exposed to outside temperature and humidity, use a minimum of 2” of
insulation and a vapor barrier. Distribution system in attic, furred space or crawl space
should be insulated with at least 2” of insulation. 1⁄2” to 1” thick insulation is usually suffi-
cient for ductwork inside the air conditioned space.
Provide balancing dampers for each branch duct in the supply system. Properly support
ductwork from the structure.
MPORTANT: In the event that the return air ducts must be run through an “unconfined”
space containing other fuel burning equipment, it is imperative that the user/homeowner
must be informed against future changes in construction which might change this to a
“confined space.” Also, caution the user/homeowner against any future installation of
additional equipment (such as power ventilators, clothes dryers, etc., within the existing
unconfined and/or confined space which might create a negative pressure within the
vicinity of other solid, liquid, or gas fueled appliances.
H. RETURN AIR
!WARNING
NEVER ALLOW PRODUCTS OF COMBUST ON OR THE FLUE PRODUCTS TO
ENTER THE RETURN A R DUCTWORK, OR THE C RCULAT NG A R SUPPLY.
ALL RETURN DUCTWORK MUST BE ADEQUATELY SEALED AND SECURED
TO THE FURNACE W TH SHEET METAL SCREWS, AND JO NTS TAPED. ALL
OTHER DUCT JO NTS MUST BE SECURED W TH APPROVED CONNECT ONS
AND SEALED A RT GHT.
FA LURE TO PREVENT PRODUCTS OF COMBUST ON FROM BE NG C RCU-
LATED NTO THE L V NG SPACE CAN CREATE POTENT ALLY HAZARDOUS
COND T ONS, NCLUD NG CAROBON MONOX DE PO SON NG THAT COULD
RESULT N PERSONAL NJURY OR DEATH.
F GURE 15
P TCHED ROOFTOP NSTALLAT ON, ON ROOFJACK, DOWNFLOW DUCTWORK, ATT C OR
DROP CE L NG D STR BUT NG SYSTEM. P TCH UN T TOWARD DRA N.

19
I . FILTERS
The installer must install field supplied filters in the return air duct. A field installed filter
grille is recommended for easy and convenient access to the filters for periodic inspec-
tion and cleaning. ilters must have adequate face area for the rated air quantity of the
unit. See air delivery tables for recommended filter size. A field installed internal filter kit
RXRY-B01 is available.
F GURE 16
L FT NG DETA L.

20
I342
I
RETURN PLENUM
161/2
MAX.
201/2 MAX.
163/8 MAX.
INSULATION
PANELS
NAILING
STRIP
CAULK ALL
JOINTS
WATERTIGHT
SUPPLY
PLENUM
DUCT
FLANGE
(NOT TO
EXCEED 1()
ROOFCURB
FIGURE 15
ROOFCURB
I255
**BY CONTRACTOR
**FOR INSTALLATION OF DUCTAS SHOWN, USE RECOMMENDED
DUCT SIZES FROM ROOFCURB INSTALLATION INSTRUCTIONS. FOR
DUCT FLANGEATTACHMENT TO UNIT, SEE UNIT INSTALLATION
INSTRUCTIONS (FIGURE 1) FOR SIZE OF DUCT OPENINGS.
ROOFTOP UNIT
TIE DOWN SCREW *
ROOFCURB
ROOF FLASHING *
ROOFING *
CANT STRIP *
ROOF DECK *
GASKET
NAILING STRIP
INSULATION *
INSULATION *
** DUCT *
FIGURE 16
ROOFCURB
F GURE 17
ROOFCURB F GURE 18
ROOFCURB
F GURE 20
RES DENT AL ROOFTOP DUCTWORK NSTALLAT ON DETA L.
F GURE 19
DUCTWORK COVER NSTALLAT ON DETA L