Page 1
PACKAGED TERMINAL AIR CONDITIONERS
STRAIGHT COOL
Nominal Capacities:
9,000 - 12,000 &
15,000 Btuh
SINGLE MOTOR
RC/RH30
RC/RH25
RC40
Enviromaster International LLC
5780 Success Dr.
Rome, NY 13440
Phone: 1-800-228-9364
Fax: 1-800-232-9364
Email: info@retroaire.com
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
An ISO 9001-2000 Certified Company
P/N# 240003989, Rev. 1.5 [02/05]
Page 2
SINGLE MOTOR PACKAGED TERMINAL AIR CONDITIONERS
INST ALLA TION, OPERA TION & MAINTENANCE MANUAL
P/N# 240003989, Rev. 1.5 [02/05]
Shipping Damage MUST be Reported to the Carrier IMMEDIATELY!!!
Examine the exterior. Remove cover and examine compressor and piping for signs of damage.
This manual is intended as an aid to qualified service
personnel for proper installation, operation, and
maintenance of the RetroAire Single Motor Packaged
Terminal Air Conditioner (PTAC). Read these instructions
thoroughly and carefully before attempting installation or
operation. Failure to follow these instructions may result
in improper installation, operation, service, or
maintenance, possibly resulting in fire, electrical shock,
property damage, personal injury, or death.
TO THE INSTALLER
(1) Retain this manual and warranty for future reference.
(2) Before leaving the premises, review this manual to be
sure the unit has been installed correctly and run the
unit for one complete cycle to make sure it functions
properly.
To obtain technical service or warranty assistance
during or after the installation of this unit, contact
your local representative. Visit our website
www.retroaire.com for a local representative
listing. For further assistance call 1-800-228-9364.
When calling for assistance, please have the
following information ready:
• Model Number_________________________
• Serial Number_________________________
• Date of Installation______________________
SAFETY INSTRUCTIONS
Read all instructions before using the RetroAire
Single Motor PTAC. Install or locate this unit only
in accordance with these instructions. Use this
unit only for its intended use as described in this
manual.
Check the rating plate on the RetroAire Single Motor
PT AC before installation to make certain the voltage
shown is the same as the electric supply to the unit.
The RetroAire Single Motor PTAC must be
connected only to a properly grounded electrical
supply. Do not fail to properly ground this unit.
Turn off the electrical supply before servicing the
RetroAire Single Motor PTAC.
Do not use the RetroAire Single Motor PTAC if it
has damaged wiring, is not working properly, or
has been damaged or dropped.
When turning the selector switch on the RC/RH30
for mode of operation, it is very important to make
sure the switch position is “SEATED” directly on
a mode of operation (clicks into position). Do not
mistakenly place between two positions. This can
result in a potential fan failure while the system is
in a cooling or heating operation. A fan failure could
result in the unit overheating (smoke) in an electric
heating mode, or freezing coil in a cooling mode.
[Save These Instructions]
DANGER
!
Do not use the RetroAire Single Motor PTAC with
any electrical supply voltage other than the one
listed on the rating plate.
Check the rating plate on the unit for the correct
voltage rating. Failure to use the correct voltage
may result in death, serious bodily injury or property
damage. If you have any questions or doubts,
consult the factory before installing this unit.
The Right Fit For Comfort
!
Recognize this symbol as an indication
!
2
of important safety information
www.retroaire.com
!
Page 3
TABLE OF CONTENTS
WARNING
!
!
To the Installer and Safety Instructions ..............2
Warnings and Installer Responsibilities ............ 3
Single Motor PTAC Family.................................4
Controls and Components .................................4
Preparation for Installation.................................4
Electrical Wiring .................................................4
RC/RH25 Replacement Chassis ................... 5-6
RC/RH30 Replacement Chassis ................... 7-8
RC40 Replacement Chassis ....................... 9-10
Final Inspection and Start-Up ..........................10
PTAC Operation ..........................................11-14
Cleaning and Maintenance........................ 14-15
Troubleshooting ...............................................15
Warranty ...........................................................16
INST ALLER RESPONSIBILITIES
This manual has been prepared to acquaint you with the
installation, operation and maintenance of this RetroAire
Single Motor PTAC and to provide important safety
information in these areas.
We urge you to read all of the instructions thoroughly before
attempting the installation or operation of this unit. This
manual should be kept for future reference.
The manufacturer of this unit will not be liable for any
damages caused by failure to comply with the installation
and operating instructions outlined in this manual.
A rating plate identifying this RetroAire Single Motor PTAC
can be found on the unit. When referring to your unit, always
have the information listed on the rating plate readily
available.
Completely read all instructions prior to
assembling, installing, operating, or repairing
this product. Inspect all parts for damage prior to
installation and start-up. The RetroAire Single
Motor PTAC must be installed ONLY by qualified
installation personnel.
MODIFICA TION AND TAMPERING
DANGER
!
Tampering with the RetroAire Single Motor
PTAC is dangerous and may result in serious
injury or death. T ampering voids all warranties.
Do not attempt to modify or change this unit in
any way.
IMPORTANT SAFETY FEATURE
Power Cord With Intergral Safety Protection
All PT ACs rated 250V or less that are cord connected
to the power supply are equipped with a power cord
with intergral safety protection as standard. Providing
personal shock protection as well as arcing and fire
prevention, the device is designed to sense any
damage in the line cord and disconnect power before
a fire can occur. Tested in accordance with
Underwriters Laboratories, the cord set also offers
a unique “passive” operation, meaning the unit does
not require resetting if main power is interrupted.
!
DANGER
!
The RetroAire Single Motor PTAC must:
Be connected to a properly grounded
electrical supply with the proper voltage as
stated on the rating plate.
Have proper over current protection (i.e.
time- delay fuse/HACR-Breaker) as listed on
the Rating Plate.
Failure to follow these instructions can result
in a fire, explosion, or electrical shock causing
property damage, personal injury, or death.
The Right Fit For Comfort
!
WARNING - A DAMAGED POWER SUPPLY CORD
MUST BE REPLACED WITH A NEW CORD FROM
THE MANUFACTURER, AND NOT REPAIRED.
Each power cord should be checked before every
use. Follow the instructions in the order listed on
the device.
WARNING - DO NOT USE THE PRODUCT IF THE
UNIT FAILS THE TEST.
3
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Page 4
SINGLE MOTOR PT AC FAMIL Y
PREP ARATION FOR INST ALLA TION
The RetroAire Single Motor Packaged Terminal Air
Conditioner family consists of:
RC/RH25 – A straight cool/heat pump replacement
for Friedrich/Climate Master model ET packaged
terminal units.
RC/RH30 – A straight Cool/Heat Pump replacement
for ZoneAire & Keeprite C/CHP series, and Carrier
51P/PH series packaged terminal units.
RC40 – A straight cool ONLY replacement for the
Fedders model CMEA packaged terminal units.
The RetroAire Single Motor PT AC family of air conditioners
is available in nominal sizes of 9,000 Btuh, 12,000 Btuh,
and 15,000 Btuh.
All RetroAire products are backed by Enviromaster
International LLC and are rated in accordance with ARI
standards 310 and 380 and UL standard 484. A full service
parts inventory is always available.
STANDARD CONTROLS AND COMPONENTS
Controls and components installed at the factory or supplied
for field installation include:
1. Remove old unit from wall sleeve and dispose of properly .
IMPORTANT: It is illegal to discharge refrigerant
into the atmosphere. Use proper reclaiming methods
and equipment when installing or servicing a
RetroAire Single Motor PT AC.
2. Inspect wall sleeve for rust or damage. Clean, replace or
repair as necessary .
3. Remove or repair old weather seals and note locations
for installation of new seals. Contact factory for weather
seals if needed.
4. Make sure wall sleeve is pitched a minimum of 5° (at
least ½”) to the outside, this will insure proper drainage.
5. Check that the drain holes are clear and free of debris.
6. Inspect exterior louver and remove any obstructions.
7. Inspect indoor supply and return air sections and
remove any obstructions (draperies, bedspreads, etc.)
that may cause an air restriction during operation.
IMPORTANT: Do not place any objects on the
supply air grille.
1. Unit mounted operating controls
• Thermostat
• Fan speed control
• Heat/cool switch (where applicable)
2. Baffle(s)
3. Fan cycle switch
4. Normally open/closed switch (hydronic heat only)
5. Foam strip seal for supply air duct
6. Removable washable mesh filters
OPTIONS & ACCESSORIES
• Long life 3, 3.5, or 5 KW electric heat element with
redundant safety controls (not RC 40)
• Continuous/cycling fan control switch
• Motorized fresh air damper with positive pressure seal
and override switch
• 1 15 Volt (RC/RH 25 only)
• Wall sleeve extension for 13” cabinets (RC/RH 30 only)
• 4” and 6” cabinet front (RC/RH 30 only)
• Hydronic heat (RC/RH 30 only)
• Long life 3.2 KW electric heat element with redundant
safety controls
• Hydronic heat, 1-row coil (RC 40 only)
• Remote thermostat (RC 40 only)
(RC 40 only)
ELECTRICAL WIRING
1. Inspect existing wiring for any deficiencies such as cut
or frayed wires.
2. All electrical wiring must be run according to NEC and
local codes. Check the unit rating plate for circuit
ampacity and breaker or fuse size. USE ONLY HACR
TYPE BREAKERS OR TIME-DELA Y FUSES. Select
the proper wire for the ampacity rating.
3. If plug and receptacle are used, be sure to check for
proper fit.
The Right Fit For Comfort
4
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Page 5
RC/RH25 REPLACEMENT CHASSIS
INSTALLATION INSTRUCTIONS
RC/RH25 BAFFLE & FOAM INST ALLATION KIT
The RetroAire RC/RH25 is available as a cooling only model
or, for those who wish to upgrade to a heat pump, the RH25
heat pump chassis will fit the existing wall sleeve. The
heat pump version will reduce energy costs during periods
of outdoor temperature ranging down to as low as 40° F.
The RC/RH25 uses a high-efficiency rotary compressor
protected under a 5-year warranty and an enhanced highefficiency heat exchanger to make the replacement of worn
out and inefficient units a very attractive option.
Whisper quiet operation improves the room ambience and
the 20 gauge G-90U galvanized steel construction of the
chassis ensures long service life.
The RetroAire RC/RH25 offers two fan speeds with
override switch and has an optional motorized fresh air
feature with a positive pressure seal, and positive
condensate re-evaporation to improve efficiency.
• 1 Installation Manual
• 1 Lt. & Rt. Baffles
• Screws
• 1/2” x 1/2” Open Cell Foam Tape
• Filter (foam)
1. Remove baffles from kit bag supplied with unit. Attach
the supplied baffles to the condenser coil front using
the existing holes in the unit. Make sure the baffles
are pointed toward the center of the condenser coil
and fasten with the screws provided. (Figure 1)
Figure 1
BAFFLES
OUTDOOR
LOUVER
CONTROL
PANEL
CONDENSER
PTAC
SUPPLY VENT
1
/2”x 1/2”
OPEN CELL
POLYFOAM
2. Install ½” X ½” open cell polyfoam around the supply
vent. (Figure 1)
3. Also install ½” X ½” open cell polyfoam (provided)
around chassis flange between wall sleeve and cooling
chassis to prevent outside air from entering around
the chassis into the room from the sides and top of the
cabinet. (Figure, 2 page 6)
4. Slide the RC/RH25 into wall sleeve until the supply duct
is flush with supply vent on room cabinet.
5. See Final Inspection and Start-up on page 11 .
Consult factory for custom wall sleeve kit information and
availability.
The Right Fit For Comfort
5
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Page 6
RC/RH25 SPECIFICATIONS AND PERFORMANCE
IMPORTANT: Due to ongoing product development, designs, specifications, and performance are subject to change without
notice. Please consult factory for further information.
Figure 2
SUPPLY VENT
Straight Cool Only
RC/RH 25 Electrical Specifications
Mode l
Num be r FLA RLA
9
12
15
Voltage/hz/ph
208/230/60/ 1 1. 1 3.8 4.9 5.9 15 197 6-15P
265/60/1 1.1 3.3 4.4 5.2 15 240 7-20P
208/230/60/ 1 1. 1 4.8 5.9 7.1 15 197 6-15P
265/60/1 1.1 4.2 5.3 6.4 15 240 7-20P
208/230/60/ 1 1. 1 7.6 8.7 10.6 15 197 6-15P
265/60/1 1.1 6.3 7.4 9. 0 15 240 7-20P
Fan M otor Com pressor
Hp
0.18 20
0.25 18.6
0.18 26.3
0.25 28
0.18 45
0.25 32
LRA
Total
amps
MCA
Max
Fuse
Min
Voltage
Line Cord
RC/RH 25 Optional Electric Heat
Heater No. Voltage MCA Ma x Fuse Line Cord
2
3
4 (3.5)
5
208 12.9 15 6-15P
230 14.1 15 6-15P
265 16.1 20 7-20P
208 15.8 20 6-20P
230 17.4 20 6-20P
265 18.8 20 7-20P
277 19.6 20 7-20P
208 18.3 20 6-20P
230 20.1 20 6-20P
265 23.0 25 7-30P
208 25.7 30 6-30P
230 28.3 30 6-30P
NEMA Specifications Non-Locking/Receptacles
Watts Btuh Amps Total Heat Amps
1963 6700 9.4
2400 8200 10. 4 11.5
3186 10900 12.0
2454 8400 11. 8 12.9
3000 10300 13.0
3752 12900 14.2 15.3
4100 14000 14.8 15.9
2862 9800 13. 8
3500 12000 15.2 16.3
4646 15900 17.5 18.6
4089 14000 19.7
5000 17100 21.7 22.8
MODEL
9 9,200 9.8 8,600 3.2 410/305 40/35
12 12,300 9.7 11,800 3.2 410/305 40/35
15 15,100 8 13,700 2.6 410/305 55/45
10.5
13.1
14.1
14.9
20.8
COOLING
BTUH
RC/RH25 P ERF ORM ANCE DATA
EER
HEATING
BTUH
COP
EVAP CFM
HIGH/LOW
FRESH AIR
CFM
The Right Fit For Comfort
6
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Page 7
RC/RH30 REPLACEMENT CHASSIS
INSTALLATION INSTRUCTIONS
RC/RH30 INST ALLATION KIT
• 1 Installation Manual
The RetroAire RC/RH30 is available as a cooling only model
or, for those who wish to upgrade to a heat pump, the RH30
heat pump chassis will fit the existing wall sleeve. The heat
pump version will reduce energy costs during periods of
outdoor temperature ranging down to as low as 40° F.
The RC/RH30 uses a high-efficiency rotary compressor
protected under a 5-year warranty and an enhanced highefficiency heat exchanger to make the replacement of worn
out and inefficient units a very attractive option.
Whisper quiet operation improves the room ambience and
the 20 gauge G-90U galvanized steel construction of the
chassis ensures long service life.
The RetroAire RC/RH30 with override switch offers three
fan speeds, and has an optional motorized fresh air feature
with a positive pressure seal, and positive condensate reevaporation to improve efficiency.
HYDRONIC
• 1ea. 2-Position Connector & Pin Mate
ONLY
• 14AWG Yellow Wire
IMPORT ANT : The RC/RH30 comes with a factory installed
indoor supply louver and one factory installed baffle.
1. Please verify that the baffle is installed so that it points
to the middle of the condenser coil. (Figure 3)
Figure 3
15” X 3¼” BAFFLE
OUTDOOR
LOUVER
PT AC
CONTROL
PANEL
2. Slide the RC30 into the wall sleeve until the supply
duct is flush with the supply louver on the room cabinet.
Hydronic Only: Remove the 2-position connector
assembly from kit bag supplied with unit (this will have
2 yellow wires attached). Connect this 2-position
connector to the 2-position connection located on the
bottom of the control box panel.
T o Connect Aquastat:
A. Remove the black jumper wire located on the
bottom panel of the control box (this is also
terminated with a 2-position connector).
B. Cut the jumper wire in the middle and splice the
Aquastat to the jumper.
C. Place the connecter back into original location.
Refer to wire diagram on the unit for details.
Cabinet fronts are available to match with various wall
sleeve depths. (See chart on page 8)
The Right Fit For Comfort
3. See Final Inspection and Startup on page 11.
RC/RH30 SAFETY NOTE: When turning the selector
knob on the RC/RH30 for mode of operation, it is very
important to make sure the knob position is
“SEATED” directly on a mode of operation (clicks
into position). Do not mistakenly place between two
positions. This can result in a potential fan failure while
the system is in a cooling or heating operation. A fan
failure could result in the unit overheating (smoke) in
an electric heating mode, or freezing coil in a cooling
mode. (See page 11)
7
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Page 8
RC/RH30 SPECIFICATIONS AND PERFORMANCE
IMPORTANT: Due to ongoing product development, designs, specifications, and performance are
subject to change without notice. Please consult factory for further information.
EXISTING WALL SLEEVE DEPTH!
PLEASE NOTE
• For 13” sleeve, use wall sleeve
extension and 6” cabinet front.
• For 15” sleeve, use 6” cabinet
front only.
• No accessories are required for a
17” wall sleeve.
COOLING
MODEL
9 9,400 10.3 8,500 3.1 305/275/260 40/35
12 11,400 9 10,800 3.1 305/275/260 40/35
15 13,500 8.6 12,700 2.8 305/275/260 40/35
RC/RH30 PERFORMANCE DATA
BTUH
EER
HEATING
BTUH
NEMA Specifications Non-Locking/Receptacles
COP
EVAP CFM
HI/MED/LOW
FRESH AIR
CFM
RC/RH 30 Electr i cal Specifications
Model
Number FLA RLA
9
12
15
Voltage/hz/ph
115/60/1 2 7.4 9.4 11.3 15 104 5-15P
208/230/60/1 0.8 3.8 4.6 5.6 15 197 6-15P
265/60/1 1.1 3.3 4.4 5.2 15 240 7-20P
115/60/1 2 9.7 11.7 14.1 20 104 5-15P
208/230/60/1 0.8 4.8 5.6 6.8 15 197 6-15P
265/60/1 1.1 4.2 5.3 6.4 15 240 7-20P
208/230/60/1 0.8 6.4 7.2 8.8 15 197 6-15P
265/60/1 1.1 5.4 6.5 7.9 15 240 7-20P
Fan Motor Compressor Total
Hp LRA
0.125 44
0.125 20
0.25 18.6
0.125 54
0.125 26.3
0.25 28
0.125 38
0.25 32
amps
MCA
Max
Fuse
Min
Voltage
Line Cord
RC/RH 30 Optional Elect r i c Heat
Heater No. Voltage MCA Max Fuse Line Cord
2
2 (2.4)
3
4 (3.5)
5
208 10.6 15 6-15P
230 11.7 15 6-15P
265 13.6 15 7-20P
208 12.6 15 6-15P
230 13.8 15 6-15P
265 16.1 20 7-20P
208 15.5 20 6-20P
230 17.1 20 6-20P
265 18.8 20 7-20P
277 19.6 20 7-20P
208 18.0 20 6-20P
230 19.8 20 6-20P
265 23.0 25 7-30P
208 25.4 30 6-30P
230 28.0 30 6-30P
Wa tts Btuh Amps Total Heat Amps
1636 5600 7.9
2000 6900 8.7 9.5
2655 9100 10.0
1963 6700 9.4 10.2
2400 8200 10.4 11.2
3186 10900 12.0 13.1
2454 8400 11.8
3000 10300 13.0 13.8
3752 12900 14.2 15.3
4100 14000 14.8 15.9
2862 9800 13.8
3500 12000 15.2 16.0
4646 15900 17.5 18.6
4089 14000 19.7
5000 17100 21.7 22.5
8.7
11.1
12.6
14.6
20.5
The Right Fit For Comfort
8
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Page 9
RC40 REPLACEMENT CHASSIS
INSTALLATION INSTRUCTIONS
1. T o test the alignment, slide the RC40 into the wall sleeve
until the supply duct is flush with the supply louver on
the room cabinet.
2. Slide unit out of wall sleeve.
Figure 4
SIDE BAFFLES
RC40 BAFFLE & FOAM INST ALLATION KIT
• 1 Installation Manual
• 1 Right Baffle
• 1 Left Baffle
• 1” x 1” Open Cell Foam Tape
HYDRONIC
ONLY
• 1ea. 2-Position Connector & Pin Mate
• 14AWG Yellow Wire
• 1/4” Varflex, Non-Fray Sleeving
• 1/2” x 1/2” Open Cell Foam Tape
• Screws
• 2 Sets Of Baffles Are Supplied
W/15,000 Btuh Units Only*
The RetroAire RC40 is a cooling only replacement chassis
designed to upgrade room comfort through higher efficiency
and enhanced reliability .
The RetroAire RC40 uses a high-efficiency rotary compressor
protected under a 5-year warranty and an enhanced highefficiency heat exchanger to make the replacement of worn
out and inefficient units a very attractive option.
Whisper quiet operation improves the room ambience and
the 20 gauge G-90U galvanized steel construction of the
chassis ensures long service life.
The RetroAire RC40 9,000, 12,000 and 15,000 Btuh units
are all available in a 21" chassis. *Depending on wall-sleeve
depth, the RC 15,000 Btuh may need deeper baffles installed for proper operation (baffles supplied in kit bag).
The 9,000 and 12,000 Btuh units are single motor applications, while the 15,000 Btuh unit is a dual-motor application. All three capacities have two fan speeds and come
equipped with a fan cycle switch.
All three capacities come equipped with a fan cycle switch.
These units offer an optional motorized fresh air feature with
a positive pressure seal, and positive condensate reevaporation which improves efficiency .
CONDENSER COIL
PT AC
TOP VIEW
CONTROL
PANEL
OUTDOOR
LOUVER
3. Remove baffles from the kit bag supplied with unit.
Condenser baffles must be secured tightly to the
condenser coil and the baffles need to come in contact
with the outdoor louver . To install the baffles point both
baffles toward the center of the condenser and fasten
using the existing holes and screws provided. (Figure 4)
4. ½” X ½” open cell polyfoam must be placed around the
supply air duct on top of the cooling chassis. Failure
to do so will result in re-circulation of the conditioned
air around the wall sleeve and through the unit, causing
the unit to short cycle. (Figure 5 page 10)
5. 1” X 1” open cell polyfoam is provided to prevent outside
air from entering around the chassis to the room from
the sides and top of the cabinet. Install between well
sleeve and cooling chassis. (Figure 5 page 10)
Hydronic Only: Remove the 2-position connector
assembly from kit bag supplied with unit (this will have
2 yellow wires attached). Connect this 2-position
connector to the 2-position connection located on the
bottom of the control box panel.
To Connect Aquastat:
A. Remove the black jumper wire located on the
bottom panel of the control box (this is also
terminated with a 2-position connector).
B. Cut the jumper wire in the middle and splice the
Aquastat to the jumper.
C. Place the connector back into original location.
Refer to wire diagram on the unit for details.
6. See Final Inspection and Startup on page 11.
The Right Fit For Comfort
9
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Page 10
RC40 SPECIFICATIONS AND PERFORMANCE
IMPORTANT: Due to ongoing product development, designs, specifications, and performance are subject to change without notice.
Please consult factory for further information.
5
/
8
15
”
SUPPLY AIR DUCT
21”
Figure 5
25
1
/
2
”
RC40 PERF ORM ANCE DAT A
Cooling
Model
Btuh
09 8,700 9.0 305/275 40/35
12 11,000 8.5 305/275 55/45
15 14,300 8.0 305/275 55/45
EER
EVAP CFM
High/Low
FreshAir
CFM
RC40 OPTIONAL ELECT RIC HEAT SP ECI F I C AT I O NS
Total Heat
AMPS
MCA Max FuseHeater Voltage
Line Cord
3 (3. 2 )
Watts Btuh
208 2,617 9,000 12.6 13.4 16.5 20 6-20P
230 3,200 11,000 13.9 14.7 18.2 20 6-20P
AMPS
RC 40 Electr ical Sp ecifications
Model Total Max Min Line
Number FLA Hp FLA Hp RLA LRA amps Fuse Voltage Cord
Voltage/hz/ph
09 208/230/60/1 0.8 1/8 N/A N/A 4.1 20 4.9 5.9 15 197 6-15P
12 208/230/60/1 0.8 1/8 N/A N/A 5.1 28 5.9 7.2 15 197 6-15P
15 208/230/60/1 0.8 1/8 0.71 0.09 6.4 38 7.9 9.5 15 197 6-15P
Evap Motor Cond Motor Compressor
MCA
The Right Fit For Comfort
NEMA Specifications
Non-Locking/Receptacles
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Page 11
FINAL INSPECTION AND START-UP
1. Make sure the chassis is level. Check by pouring
water into the drain pan and making certain it flows
through the drain hoses to the condenser side of
the unit.
2. Plug or hard wire line voltage to unit.
IMPORTANT: Follow the information provided on the
rating plate for voltage and amperage/fuse size for proper
supply .
3. Turn the power on.
4. Check for proper operation (i.e., cooling, optional
fresh air, and heating if supplied).
RETROAIRE PT AC OPERATION
UNIT MOUNTED AND REMOTE
THERMOST AT CONTROLS
RetroAire units can be equipped with unit mounted or
remote controlled thermostats. Turning the unit
mounted thermostat knob to the far left will produce
the warmest room temperature while turning it all the
way to the right will produce the coolest. These settings
can be adjusted for personal comfort.
Units with remote thermostats will require operation
according to standard thermostat settings. Refer to the
operating instructions for the specific thermostat used.
CHOOSING A THERMOSTAT
EMI offers a thermostat that is compatible with your PT AC/
PTHP unit. Select EMI part number 240-2960 from the
latest Retroaire price list for this option. This is a single
stage, cool/heat, mercury bulb thermostat that can be used
in all Retroaire cooling, heating or heat pump applications.
The thermostat has an adjustable set-point range of
between 55°F and 95°F. There are two independent,
adjustable stops that can limit the heating or cooling range
of the thermostat. If a non-mercury, electronic thermostat
is needed, then choose EMI part number 240-3926.
SELECTING A THERMOSTAT “By Others”
When selecting a thermostat other than those offered by
EMI, it is important to choose a single stage heat/cool,
24V thermostat. For models 09-17, do NOT select a
thermostat that requires connection to a “C” terminal since
these units do not have provisions for connecting to a “C”
terminal. Only models 19 and 24 have provisions for
connecting a “C” terminal to the unit.
Figure 6
COLDHEA T
TEMPERATURE
RC/RH30 SAFETY NOTE
When turning the selector knob on the RC/RH30 for
mode of operation, it is very important to make sure
the knob position is “SEATED” directly on a mode of
operation (clicks into position). Do not mistakenly
place between two positions. This can result in a
potential fan failure while the system is in a cooling
or heating operation. A fan failure could result in the
unit overheating (smoke) in an electric heating mode
or freezing coil in a cooling mode.
RIGHT WRONG
If a thermostat without a “C” terminal is used in a models
19 or 24, then it is important to insulate the unused
BROWN “C” low volt wire to prevent it from shorting at the
thermostat.
COOLING ONLY WITH ELECTRIC HEAT OR
HYDRONIC HEAT
Select a thermostat that is compatible with a cooling electric heat system. The thermostat should have “R”,
“Y”, “W” and “G” terminals
HEAT PUMP WITH ELECTRIC HEAT (RH - PTHP’S)
Select a thermostat that is compatible with a cooling single stage heat - heat pump system. The thermostat
should have “R”, “Y”, “O” and “G” terminals. Retroaire units
are single stage heating only. The electric heat and heat
pump will not operate simultaneously.
FAN OPERATION
Some thermostats are equipped with an auto/on fan
switch. When this switch is placed in the on position the
indoor fan will run continuous. When the switch is in the
auto position the indoor fan will cycle with the call for
heating or cooling.
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Page 12
RETROAIRE PTAC OPERATION (Continued)
FAN PURGE (Optional)
After the room thermostat has been satisfied, the purge
feature allows the indoor fan to remain on for an additional
60 seconds. This increases efficiency by pulling the
remaining energy from the unit.
COOLING OPERATION
After connecting the thermostat to the unit place the system
switch in cool mode. Adjust the set-point temperature
below the room temperature. The compressor and fan
motors will start and cooling will begin. Place the set-point
temperature above the room temperature. The compressor
and condenser fan will stop and the indoor fan will remain
on for an additional sixty seconds.
the set-point remains above room temperature. Next place
the set-point temperature below room temperature. The
Electric heater will switch off and the indoor fan will remain
on for an additional sixty seconds.
HYDRONIC HEAT OPERATION (Optional)
An optional hydronic heat package may be selected in
lieu of electric heat. Heating operation is essentially the
same as that of units with electric heat. With the thermostat
system switch set to heat and the set-point temperature
above room temperature, the hydronic valve will open
allowing water to flow through the coil. The indoor fan will
also switch on and warm air will flow from the unit. Heating
will continue so long as the set-point remains above room
temperature. Place the set-point temperature below room
temperature. The hydronic valve will close and indoor fan
will switch off after the sixty-second purge time has
elapsed. The hydronic valve is a 24Vac normally open
valve. Should power be lost to the unit, the valve will default
to the open position.
HEAT PUMP (Cooling Mode)
HEAT PUMP (Heating Mode)
Heat pump units are “Limited Range” equipped with backup electric resistance heat. Limited Range heat pumps
are designed to operate when outdoor temperatures are
between 75°F and 40°F and with a maximum indoor
temperature of 80°F. When the outdoor temperature falls
below approximately 40°F the unit will switch from heat
pump to electric resistance heat. Electric heat will then
remain as the heat source until the outdoor temperatures
rise above 50°F. Retroaire heat pumps (RH – PTHP) are
single-stage heating units. The electric heat and heat pump
will NOT operate simultaneously.
To operate the unit in heating mode, it must first be
connected to an appropriate heat pump thermostat. (See
choosing a thermostat). Select heat on the thermostat
system switch. Then, adjust the set-point temperature
above the room temperature. The compressor and fan
motors will start and heating will begin. If the outdoor
temperature is below approximately 40°F the heat pump
system will not operate. Electric heat will then take over
the heating demand. Heating will continue so long as the
set-point temperature remains above the room
temperature. Place the set-point temperature below the
room temperature. The heating mode will cease and the
indoor fan will remain on for an additional sixty seconds.
NOTE: The start of the compressor will not take place
until the anti-short/random start time period has elapsed.
HEAT PUMP (Emergency Heat)
WARNING!
!
Before accessing the control compartment, disconnect power to the unit. Failure to do so could result in
serious injury or electrical shock.
!
Cooling operation in a heat pump unit is described in
“Cooling operation” above. The unit is equipped with a
reversing valve that is energized for cooling and deenergized in heating mode.
The Right Fit For Comfort
Should the heat pump system fail, it is possible to force
the control board into electric heat mode. This is a temporary solution until the heat pump system can be repaired.
Locate the circuit board in the control section of the unit.
Locate the terminals where the outdoor sensor connects to
the circuit board. Using a small needle nose type pliers,
disconnect one side of the sensor from the circuit board.
This will appear to the circuit board as an outdoor coil
freeze condition there-by energizing the electric resistance
heater on the call for heat.
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Page 13
RETROAIRE PTAC OPERATION (Continued)
HEA T PUMP
(Thermostatic Drain Pan Valve)
Heat pump units are equipped with a thermostatic drain
valve that will open when outdoor temperatures fall below
50°F. This keeps the base pan free of condensate water
where it may otherwise freeze during colder outdoor temperatures. As p art of its normal operation, the unit will produce condensate and collect it in the base pan of the unit.
There it will be picked up by the condenser fan slinger
ring and deposited onto the condenser coil. During the
cooling season, this improves the unit’s efficiency by maintaining adequate refrigeration system pressures.
ANTI-SHORT CYCLE TIMER
Random Start Feature (Optional)
This feature will prevent compressor short cycling and also
prevent multiple units in a single facility from simultaneously starting following a power outage. This delay on
break feature ensures that the compressor remains off,
between cycles, until the three-minute time delay period
has elapsed allowing system pressures to equalize before re-starting.
Figure 1
HEAT PUMP
STRAIGHT COOL
STRAIGHT COOL/HEAT PUMP JUMER
The second is a set of two pins labeled “TEST”. When these
two pins are jumped together, all timers are eliminated (i.e.
anti-short, purge, ect.). This is mainly used for production
line testing however it may also be useful for field-testing as
well. The units are shipped with the “TEST” jumper on only
one of the pins. Please, do not leave a unit with the test
jumper in the test mode. (Figure 2)
Figure 2
The random start feature, initiated after a power failure,
will add a random time delay (between 5-120 seconds) to
the three-minute anti short cycle time following a power
outage. This will stagger the starting of multiple units in a
single facility allowing a building to slowly go back on line
when power is restored.
INDOOR COIL FREEZE PROTECTION (Optional)
This feature will prevent the indoor coil from freeze up in
the cooling mode. Indoor coil freeze up can occur due to
a dirty air filter, low refrigerant charge or low room or outdoor temperatures. This in turn can cause compressor
damage. Should a freeze condition be detected, the compressor and condenser fan will be switched off for a minimum of three minutes and until the freeze condition is
satisfied. During this time the indoor fan will continue
to run to aid in the defrost process.
AJ4004 CONTROL BOARD (Optional)
There are two sets of jumper pins on the control board
that are factory set so there should no need to set them
later on in the field. The first is a set of three pins labeled
“HP” for selection of either a “Straight Cool” or “Heat Pump”
unit. For “Straight Cool” the center pin and outer most pin
(usually on the top) are to be jumped together. For Heat
Pump units the center pin and the pin closest to the relay
are to be jumped together. (Figure 1)
TEST JUMPER POSITION FOR
NORMAL OPERATION
The LED Blink Codes Are As Listed In Below.
1 Blink Normal Operation
2 Blinks Compressor Lockout (ASCT)
3 Blinks Outdoor freeze condition
4 Blinks Indoor freeze condition
5 Blinks Simultaneous W & Y Call
Important Sensor Resistances
Are As Follows
77 °F - 10K ohms
50 °F - 19.9K ohms
35 °F - 30K ohms
30 °F - 34.4K ohms
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Page 14
RETROAIRE PTAC OPERATION (Continued)
MOTORIZED FRESH AIR DAMPER (Optional)
The optional motorized damper allows fresh air to be brought
into the room. By moving the “Fresh Air” switch to the Yes
position, outside air will be brought into the room when the
indoor fan is circulating air. To circulate indoor air without
fresh air, set the “Fresh Air” switch to the No position.
CLEANING AND MAINTENANCE
WARNING
!
RetroAire Single Motor PTACS are designed and constructed for reliability and long life with minimal maintenance but service or repairs should only be performed
by qualified service personnel.
CLEANING THE INTERIOR OF THE UNIT
1. Disconnect power from unit.
2. Remove access panels and do a visual
inspection of the unit, making sure to check for
obvious problems such as broken wires, damaged
coils, or evidence of extended wear on any moving
part.
3. Check for unusual odors, oil leaks, or stains on
or around the coil and refrigerant lines. The
presence of oil here may indicate a potentially
serious problem such as a refrigerant leak.
4. Inspect all electrical connections. Look for
frayed wires and poor connections. Terminal ends
that are loose will eventually fail, causing a loss
of performance or worse.
5. Check fan motors and blower assemblies.
Some units may require a drop of light oil to motors
and/or bearing assemblies (look for oil cups).
Check setscrews and motor mounting hardware,
making sure they are tight.
!
CHANGEOVER T -STA TS (Heat pump only)
On units with a changeover thermostat, the compressor will
run until just above freezing (40
heat will then energize and assume the heating demand
until the temperature of the outdoor air rises to approximately
50
° F.
IMPORTANT: The Single-Motor PTAC is equipped
with a permanently lubricated motor. Although oiling
is not necessary , adding a few drops through the oiling
ports twice yearly will extend the life of the motor. Do
NOT over oil!!
6. Brush and/or vacuum the centrifugal fan blades and
blower cage assemblies. These parts must be clean
to operate efficiently.
7. Inspect and clean the indoor and outdoor coils, using a
fin comb, if necessary , to straighten any damaged fins.
These coils must be clean for proper operation.
IMPORTANT: Do not use a solvent-based cleaner
when cleaning the indoor or outdoor coils. Some
solvents can produce a noxious odor when starting
the fan or electric heat.
8. Inspect and clean the drain pan and drain line (if any).
Use of an anti-fungicide tablet is recommended to keep
the condensate system free from bacterial
contaminants.
9. Check the pitch of the unit and wall sleeve. Over time,
the building and equipment may settle, causing a shift
in the direction of the condensate flows. Ideally, the
unit should pitch a minimum of 5° (at least ½”) to the
outside to allow for proper drainage.
10. Replace panels and reconnect electrical power.
° F) and then shut off. Electric
The Right Fit For Comfort
11. Test unit operation.
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Page 15
CLEANING AND MAINTENANCE (Continued)
CLEANING THE EXTERIOR OF THE UNIT
1. Clean the air filter at least once a month by removing it
from the unit and washing or vacuuming any dust from
its surface. Allowing dust to collect on the filter will
cause the PTAC to lose efficiency and eventually
malfunction.
2. When cleaning the filter, be sure to vacuum any dust
from the return air grille surface as well.
3. Clean the exterior of the cabinet as desired with a mild
soap or household cleaner.
TROUBLESHOOTING
NO HEA T OR COOLING: Check to see if the unit has power
and if the thermostat is satisfied. If the thermostat is not
satisfied, refer to the wiring diagram and check control
components for continuity.
DANGER
!
Before servicing the RetroAire Single Motor PT AC,
be sure to turn off electrical power to the unit.
Failure to do so can result in a fire, explosion or
electrical shock causing property damage,
personal injury, or death.
!
The Right Fit For Comfort
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Page 16
ALL PRODUCT LIMITED WARRANTY
Enviromaster International LLC (EMI) warrants to the purchaser/owner that EMI products will be free
from defects in material and workmanship under the normal use and maintenance for a period of
twelve months for all components and sixty months on unit compressors from the date of original
installation, or fifteen months for all components and sixty-three months on unit compressors from the
date of manufacture, whichever comes first.
WHAT WE WILL COVER
EMI will replace any defective part returned to EMI's approved service organization with a new or
rebuilt part at no charge. The replacement part assumes that unused portion of this warranty.
WHAT WE DON'T COVER
THIS WARRANTY DOES NOT INCLUDE LABOR or other costs incurred for repairing, removing,
installing, shipping, servicing, or handling of either defective or replacement parts.
EMI IS NOT RESPONSIBLE FOR:
• Normal maintenance
• Damage or repairs required as a consequence of faulty installation or application by others.
• Failure to start due to voltage conditions, blown fuses, open circuit breakers, or other damages
due to the inadequacy or interruption of electrical service.
• Damage or repairs needed as a consequence of any misapplication, abuse, improper servicing,
unauthorized alteration, or improper operation.
• Damage as a result of floods, winds, fires, lightening, accidents, corrosive atmosphere, or other
conditions beyond the control of EMI.
• Parts not supplied or designated by EMI.
• Products installed outside the United S t ates or Canada.
• Any damages to person or property of whatever kind, direct or indirect, special or consequential,
whether resulting from use or loss of use of the product.
LIMITATION OF WARRANTIES
This warranty is exclusive and in lieu of any implied warranties of merchantability and fitness for a
particular purpose and all other warranties express or implied. The remedies provided for in this warranty
are exclusive and shall constitute the only liabilities on the part of EMI including any statements made
by any individual which shall be of no effect.
FOR SERVICE OR REPAIR:
(1) Contact the Installer
(2) Call the Nearest Distributor
(3) Call or Write:
ENVIROMASTER INTERNATIONAL LLC
5780 Success Dr., Rome, NY 13440
Phone: 1-800-228-9364
FAX: 1-800-232-9364
Email: info@retroaire.com
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