Retro Aire R15C Instruction manual

e Right Fit for Comfort
™
ECR International Inc
2201 Dwyer Avenue
Utica, NY 13501
e-mail: [e-mail]
An ISO 9001-2008 Certified Company
P/N 240008223, Rev. K [05/14/2012]
R15C - R50C - R55C
R60C/H - R65C
Packaged Terminal Air Conditioner (PTAC)
Packaged Terminal Heat Pump (PTHP)
Straight cooling nominal capacities
Btuh 9,000 12,000 15,000 18,000
kW 2.6 3.5 4.4 5.3
Model
R15C
R50C
R55C
R60C
R65C
Heat pump nominal capacities
Btuh 9,000 12,000 15,000
kW 2.6 3.5 4.4
Model R60H
Installation, Operation,
& Maintenance Manual
R15C
Replacement for:
American Air Filter series 25 & Others,
American Standard 41
R50C
Replacement for:
Dunham/Bush Newport
Models I, II, III, IV
R55C
Replacement for:
Remington EB
R60C | R60H
Replacement for:
Remington , Singer, or Mcquay K/EK
R65C
Replacement for:
Reminton, Singer,
McQuay J/EJ and others

Read This First
To the installer
Retain this manual and warranty for future reference.
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 aer the
installation of this unit, contact your local representative. Visit our web
site 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_________________________________
NOTICE
e RetroAire™ replacement PTAC/PTHP is backed by EMI
and ECR International and is tested and rated in accordance
with:
AHRI Standards 310/380
UL-484
Due to ongoing product development, product designs and
specications may change without notice.
Please contact the factory for more information.
Contents
Read This First 2-3
To the installer . . . . . . . . . . . . . . . . . 2
Inspection . . . . . . . . . . . . . . . . . . . 3
General precautions . . . . . . . . . . . . . . . 3
General Product Information 4-9
Product description . . . . . . . . . . . . . . . 4
Standard controls and components . . . . . . . . . 4
Factory-installed options (consult the factory) . . . . . . 4
Field-installed options . . . . . . . . . . . . . . 4
R15C/R15H Chassis . . . . . . . . . . . . . . . 5
R50C/R50H Chassis . . . . . . . . . . . . . . 6-7
R55C/R55H Chassis . . . . . . . . . . . . . . . 8
R60C/R60H Chassis . . . . . . . . . . . . . . . 9
R65C/R65H Chassis . . . . . . . . . . . . . . .10
PTAC/PTHP Model Coding 11-12
Features 13-14
Optional wall-mounted thermostats . . . . . . . . .14
Preparing for the Installation of the PTAC/PTHP 15
Electrical power connection . . . . . . . . . . . .15
Remove the old chassis . . . . . . . . . . . . . .15
Installation Instructions — R15C 16-19
Installation Instructions — R50C 20-21
Installation Instructions — R55C 22-23
Installation Instructions — R60C |R60H 24-25
Installation Instructions — R65C 26-27
Field Installation of Sensor Wires — R65C 28-29
Sequence of Operation 30-31
Initial Power-Up or power restoration . . . . . . . .30
R_ _C / R_ _H: Cooling Operation . . . . . . . . . .30
R_ _C / R_ _H: Heating Operation . . . . . . . . . .31
R_ _H: Mechanical Heating "Heat Pump" . . . . . . .31
R_ _H: Auxiliary Heating "Electric" or "Hydronic" . . . .31
Final Inspection & Start-up 32-37
Before operating the unit . . . . . . . . . . . . .34
Setting the control board jumpers. . . . . . . . . .34
Start Up . . . . . . . . . . . . . . . . . . . .34
Unit-mounted thermostat . . . . . . . . . . . . .34
Remote-mounted thermostat . . . . . . . . . . .34
Straight cooling PTAC's . . . . . . . . . . . . 34-35
Heat Pump PTHP's . . . . . . . . . . . . . . 35-37
Start-up . . . . . . . . . . . . . . . . . . . .37
Maintenance & Troubleshooting 38-40
Monthly inspection and maintenance . . . . . . . .38
Seasonal start-up and maintenance . . . . . . . 38-39
Heat pump units — temporary emergency heating mode 39
Troubleshooting sensors . . . . . . . . . . . . .39
Troubleshooting . . . . . . . . . . . . . . . .40
Performance Data 41
Electrical Specications 42-47
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The Right Fit for Comfort 2P/N 240008223, Rev. K [05/14/2012]

Read This First (continued)
General precautions
DANGER
Electrical Supply
Carefully read the rating plate located on the front panel.
e RetroAire replacement PTAC/PTHP must:
Be properly connected• to electrical supply with the
proper voltage as stated on the rating plate.
Be properly grounded• .
Use the properly-sized over-current protection•
device as stated on the rating plate. (time-delay fuse/
HACR Breaker)
Do not modify the RetroAire replacement PTAC/PTHP
Do not attempt to modify or change this unit in any way.
Tampering with the RetroAire replacement PTAC/PTHP is
dangerous and may result in serious injury or death. Tampering
voids all warranties.
Power Cord
The power cord supplied with the RetroAire replacement
PTAC/PTHP should be checked before every use. Follow the
instructions in the order listed on the device. Do not use the
product if the cord fails the test. A damaged power supply cord
must be replaced with a new cord from the manufacturer and not
repaired. e use of extension cords is prohibited.
Failure to follow these instructions can result in a re, explo-
sion or electrical shock causing property damage, personal
injury or death.
WARNING — Safety instructions
Save these instructions — this manual is intended as an
aid to qualied service personnel for proper installation,
operation, and maintenance of the RetroAire replacement
PTAC/PTHP.
Read all instructions thoroughly and carefully before at-
tempting installation or operation. Install or locate this unit
only in accordance with these instructions. Use this unit only
for its intended use as described in this manual.
Turn o the electrical supply before servicing the unit.
PTAC/PTHP chassis are heavy. To avoid injury, use assistance
when liing.
Do not use the unit if it has damaged wiring, is not working
properly, or has been damaged or dropped.
Failure to follow these instructions may result in improper installa-
tion, operation, service, or maintenance, possibly resulting in re,
electrical shock, property damage, personal injury, or death.
Recognize this symbol as an indication
of important safety information.
Inspection
Carefully check the shipment against the bill of lading.•
Make sure correct chassis has been received (• as well as any op-
tions).
Verify your equipment by using• “Model coding” on page 11.
Verify unit:
Unit size and type correct per submial sheet and job requirements?•
Voltage correct?•
Verify options (if any):
Capacity, electric heat if used?•
Hydronic coil included, if required? Piping located as required?•
All other factory installed options installed, if any?•
All eld installed options included, if any?•
Shipping damage MUST be reported to
the carrier IMMEDIATELY.
Examine the exterior.•
Remove cover and examine•
compressor and piping for signs
of damage.
Inspect each component for damage.•
Concealed damage must be reported to the carrier•
within 15 days of the receipt of the shipment.
e carrier must make proper notation on the delivery•
receipt of all damage identied and complete a carrier
inspection report.
e purchaser must notify ECR International’s Cus-•
tomer Service department of all damage and is respon-
sible for ling any necessary claims with the carrier.
Customer Service : [phone]
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P/N 240008223, Rev.K [05/14/2012] 3Made in USA

General Product Information
Product description
RetroAire Replacement Packaged Terminal Air Condition/Heat
Pumps units are available in straight cooling (PTAC) or as heat pump
systems (PTHP). Both the PTAC and PTHP congurations t the
wall sleeves of the units listed on the front cover. Heat pumps (PTHP)
reduce energy costs and will operate in mechanical heat mode down
to an outdoor temperature of 40°F (4.4°C), Below 40°F (4.4°C)
heating is accomplished by an auxillary heat option.
e Retroaire PTAC/PTHP units:
Use R-410A refrigerant. is refrigerant is not aected by a phase out• schedule.
Include high-eciency rotary compressors, protected by a 5-year war-• ranty.
Include an enhanced, high-eciency heat exchangers.•
Oer two fan speeds.•
Incorporate positive condensate re-evaporation to improve eciency.•
Have an optional motorized fresh-air feature with a positive pressure• seal.
RetroAire PTAC/PTHP ratings meet or exceed ASHE 90.1 Stan-
dards for energy eciency:
PTAC/PTHP units are available in nominal sizes of 9,000 Btuh, (2.6kW)• 12,000 Btuh (3.5kW) or 15,000 Btuh (4.4kW).
PTAC units (straight cooling only) are also available at 18,000 Btuh• (5.3kW).
Energy Eciency Rating (EER) as high as 10.•
Coefficient of performance (COP) ratings as high as 2.90 for heat•
pumps.
Standard controls and components
Construction
20-gauge galvanized steel construction of chassis.•
Condenser bae options to accommodate extended wall sleeve applica-• tions. (Consult the factory for special order items).
Powder-coated condenser and evaporator drain pan.•
Foam strip seal for supply air duct.•
Weather strip insulation.•
Air systems
Motors are thermally-protected PSC type.•
Air-stream surfaces are insulated with " ber-glass or " (3.2 mm)• Volara™.
e indoor fan is a foward-curved type, directly mounted to the motor• sha.
Unit mount controls include a eld selection switch to control indoor fan by• either cycling with compressor operation or continuously with the unit.
Condensate removal
e outdoor fan incorporates condensate slinger ring  Condensate• is thrown onto the coil, where it evaporates, improving system perfor-
mance.
ermostatic drain pan valve for condensate elimination when outdoor• temperature drops below 60°F (15°C) (heat pump units only).
Controls
Unit-mounted operating controls include thermostat, fan speed control,• heat/cool switch, fan cycle switch, fresh air switch (if equipped)
Ability to utilize 1-stage or 2-stage thermostat. 2 stage thermostat is capable• of activating emergency heat if an auxiliary heat source is available.
Low ambient protection  see "Microprocessor control board" for• details.
Ability to control a normally-open or normally-closed motor valve switch• (on hydronic heat units only). Valve controls must be ordered for 24V
or line voltage.
All hydronic heat units include molex plugs for connection of hydronic• valve motor.
Remote mount controls include fan speed control and fresh air switch (if• equipped)
All units are equipped with manual reset high pressure switch which• prevents abnormal high pressure operation, increasing compressor reli-
ability.
Microprocessor control board
e universal control board is used in straight cooling, electric resistance• heat, hydronic heat, or cooling/heat pump applications.
Random start timer prevents multiple units from simultaneous startups• aer power interruption or on initial power-up.
Fan purge  fan remains on for 60 seconds aer heat/cool is satised.•
Anti-short-cycle compressor protection prevents the compressor from• rapid cycling, increases compressor reliability.
Freeze-protection prevents evaporator coil freeze up, improving compres-• sor reliability.
Low ambient lockout prevents compressor operation in outdoor tem-• peratures less than 40°F (4.4°C). (On PTHP units supplied with unit-
mounted control, the control causes automatic changeover to auxiliary
heat, if installed.)
Test operation  all timers are temporarily suppressed to allow ease of• testing or troubleshooting.
Control board LED provides self-diagnostic troubleshooting codes, see• "Sequence of operation."
Factory-installed options (consult the factory)
265/277V(12 and 15 only)•
115V (09 &12 Models Only)•
Corrosion-resistant coil option  used for seacoast and harsh-envi-• ronment usage; coated aluminum n/copper tube condenser coil.
Motorized fresh-air damper•
Supplemental electric heat  see heat options on• “Model coding” on
page 11.
Hydronic heat controls•
Front air intake•
Field-installed accessories
Hydronic heat  the coil assembly is shipped loose for eld installation.•
Remote wall thermostat  digital 1-stage or 2-stage available.•
Wall sleeves, louvers, and cabinets•
Aquastat - delays fan start-up until coil reaches 100°F (38°C) to virtually• eliminate "cold" blow condition.
Hydronic control valve , Water 2 way & 3 way•
Hydronic control valve, Steam 2 way•
Hydronic Isolation valve, 1/2 in Sweat Connection.•
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The Right Fit for Comfort 4P/N 240008223, Rev. K [05/14/2012]

R15C | R15H chassisFigure 1
General Product Information (continued)
Rating
Plate
Electrical
Diagram
Found on
Inside
of Panel
Thermostat
Fan
Speed
Switch
(FSS)
System
Switch
(SS)
Control
Box
Blower
Chassis
High Pressure
Switch (HPS)
Fan Cycle
Switch (FCS)
Fresh Air
Switch (FAS)
Electrical
Diagram
Line
Cord
Hydronic
NO/NC Switch
T41 Bracket
Remote Controls
Unit Mount Controls
Fan
Speed
Switch
(FSS)
T25 Bracket
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P/N 240008223, Rev.K [05/14/2012] 5Made in USA

Hydronic
NO/NC Switch
Valve Orientation
Switch (VOS)
High
Pressure
Switch
(HPS)
Fan
Cycle
Switch
Manual
Fresh Air
5-POS
Molex
4-POS
Molex
6-POS
Molex
5-POS
Molex
2-POS
Molex
3-POS
Molex
Power
Connections
UM or RMT
Connections
Hydronic Motor
Connections
R50C ChassisFigure 2
Removeable Control
Box Cover
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The Right Fit for Comfort 6P/N 240008223, Rev. K [05/14/2012]

4 -POS
Fan Motor
Power and Fan
Speed
Fan
Speed
Switch
(FSS)
System
Switch
(SS)
Thermostat
Thermostat
Remote
Connections
Elec HT
Power
Plug
R50C Blower SectionFigure 3
R50C Control BoxFigure 4
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P/N 240008223, Rev.K [05/14/2012] 7Made in USA

R55CFigure 6 |R55H chassis
Thermostat
Thermostat
Fan
Speed
Switch
(FSS)
System
Switch
(SS)
Aquastat
W/ Jumper
Line
Cord
High
Pressure
Switch
(HPS)
Hydronic
NO/NC Switch
Valve Orientation
Switch (VOS)
C55
Control
Unit
B55
Blower
Unit
R55
Base
Unit
Replacement Packaged Terminal Air-Conditioning / Heat Pum
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The Right Fit for Comfort 8P/N 240008223, Rev. K [05/14/2012]

R60CFigure 7 |R60H chassis
Wire Diagram
Wire Diagram
located on back
located on back
side of cover
side of cover
Rating
Plate
Thermostat
Fan
Speed
Switch
(FSS)
System
Switch
(SS)
C60
Control
Unit
B60
Blower
Unit
R60
Base
Unit
High Pressure
Switch (HPS)
Fan Cycle
Switch (FCS)
Fresh Air
Switch (FAS)
Line
Cord
Hydronic
NO/NC Switch
Valve Orientation
Switch (VOS)
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P/N 240008223, Rev.K [05/14/2012] 9Made in USA

R65CFigure 8 |R65H chassis
Thermostat
Fan
Speed
Switch
(FSS)
System
Switch
(SS)
Fan Cycle
Switch (FCS)
C65 Control
Unit Mount Remote
C65 Control Panel
B65 Blower
R65 Chassis
Hydronic
NO/NC Switch
Valve Orientation
Switch (VOS)
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The Right Fit for Comfort 10 P/N 240008223, Rev. K [05/14/2012]

PTAC/PTHP Model Coding
Model codingFigure 9
Remote thermostat Sea Coast Coated Coils (Factory Installed, consult factory)
Hydronic Heat
Wall Sleeves. Louvers, & Cabinet (Consult Factory)
Field Installed Accessories [items to be selected during the ordering process]
Chassis coding
[verify with rating plate]
Product Series:
R__C - Straight Cool Unit (15,50,55,60,65 ONLY)
R__H - Heat Pump Unit (Only 60)
Design Revision:
A= Revision level
Replacement Options:
A=Standard or("A"Series C90)or(No Receptacle C50)(R65-Standard)
B=(Type 41-B or C15 Only)or("B" Series C90)or(Flat Top B or C60)
or (20amp recept - 2.5kw@230v or 3.5kw@277v - C50 Only)
C=(Type 25-B or C 15 Only) or ("C" Series C90) or
(Slope Top B or C60) or (30amp recept - 3.9kw
Condender Coil/Hydronic Options:
A=Standard
B=LT Supply/LT Return(R60 Only)
C=LT Supply/RT Return or RT Supply/LT Return(R60 Only)
D=RT Supply/RT Return(R60 Only)
E=No Heat or with Elect Heat and Coated Coil(R60 Only)
F=LT Supply/LT Return and Coated Coil(R60 Only)
G=LT Supply/RT Return or RT Supply/LT Return and
Coated Coil(R60 Only)
H=RT Supply/RT Return and Coated Coil(R60 Only)
Compressor Codes:
A= TECH
L= LG
T= TOSHIBA*
Standard/Special:
0= Standard
A-Z = Special option
Air Options:
A=No fresh air damper
B=With fresh air damper
Heat Options (230 Volts):
0= No Elect Heat
2 = 2 KW Elect Heat
3 = 3 KW Elect Heat
4 = 4 KW Elect Heat
5 = 5 KW Elect Heat
6 = Hydronic Heat - 1 ROW STEAM COIL (Factory Install 60 Only)
7 = OPEN
8 = Hydronic Heat - 1 ROW HYD COIL (Factory Install 60 Only)
9 = Hydronic Heat - 2 ROW HYD COIL (Factory Install 60 Only)
Control Options:
0= (UM) unit-mount with elec. heat or no elec. heat
1 = (RMT) remote tstat with elec. heat or no elec. heat
2 = (UM) unit-mount hyd. heat N/O or N/C valve (line volt.)
3 = (RMT) remote tstat hyd. heat N/O or N/C valve (line volt.)
4 = (UM) unit-mount hyd. heat N/O or N/C valve (24 volt.)
5 = (RMT) remote tstat hyd. heat N/O or N/C valve (24 volt.)
123 546789101112131415
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Voltage Option:
A - 115 - 1 - 60(15,50,65 Only)
D - 208/230 - 1 - 60(15,50,55,60,65 Only)
E - 265/277 - 1 - 60 TBD(15,50,60 Only)
Cooling Capacity (Btuh):
09-09,000 Btuh (15,50,55,60,65 Only)
12-12,000 Btuh (15,50,55,60,65 Only)
15-15,000 Btuh (15,50,60 Only)
18-18,000 Btuh (Straight Cool 15,50,60 Only)
* Toshiba compressor subject to factory availability
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P/N 240008223, Rev.K [05/14/2012] 11 Made in USA

Blower/Control Section Modular PTAC - 15,50,55,60,65,90
Product Series:
B or C_ _ "B" for Blower Section
"C" for Control Section
Replacement Options:
A = Standard or("A"Series C90)or(No Receptacle C50)
B = (Type 41-B or C15 Only) or ("B" Series C90) or (Flat Top B or C60)
or (20amp recept - 2.5kw@230v or 3.5kw@277v - C50 Only)
C = (Type 25-B or C 15 Only) or ("C" Series C90) or
(Slope Top B or C60) or (30amp recept - 3.9kw@230v - C50 Only)
Hydronic Options:
A = Standard
B = LT Supply/LT Return(B60 Only)
C = LT Supply/RT Return - STEAM OR HYD or
RT Supply/LT Return - HYD Only (B60 Only)
D = RT Supply/RT Return (B60 Only)
E = RT Supply/LT Return (B60 STEAM Only)
Open Options:
A= Standard
Standard/Special:
0= Standard
A-Z = Special option
Air Options:
A = No fresh air damper (C_ _ Only)
B = With fresh air damper (C_ _ Only)
U = Blower Section Only
Heat Options (230 Volts):
0= No Elect Heat
2 = 2 KW Elect Heat
3 = 3 KW Elect Heat
4 = 4 KW Elect Heat
5 = 5 KW Elect Heat
6 = Hydronic Heat - 1 ROW STEAM COIL (Factory Install 60 Only)
7 = OPEN
8 = Hydronic Heat - 1 ROW HYD COIL (Factory Install 60 Only)
9 = Hydronic Heat - 2 ROW HYD COIL (Factory Install 60 Only)
A = Control Box Model Only
Control Options:
0= (UM) unit-mount with elec. heat or no elec. heat
1 = (RMT) remote tstat with elec. heat or no elec. heat
2 = (UM) unit-mount hyd. heat N/O or N/C valve (line volt.)
3 = (RMT) remote tstat hyd. heat N/O or N/C valve (line volt.)
4 = (UM) unit-mount hyd. heat N/O or N/C valve (24 volt.)
5 = (RMT) remote tstat hyd. heat N/O or N/C valve (24 volt.)
A = Blower Section Only
123 45678910111213
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Voltage Option:
A - 115 - 1 - 60(15,50,65,90 Only)
D - 208/230 - 1 - 60(15,50,55,60,65,90 Only)
E - 265/277 - 1 - 60 TBD(15,50,60,90 Only)
Straight Cool or Heat Pump:
C - Straight Cool Control Box for
(15,50,55,60,65 Only)
H - Heat Pump Control Box (Only 60,90)
U - Blower Section Only
Design Revision:
A= Revision Level
PTAC/PTHP Model Coding
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The Right Fit for Comfort 12 P/N 240008223, Rev. K [05/14/2012]

Features
Indoor coil freeze protection (standard)
is feature will prevent the indoor coil from freeze up in the cooling
mode.
Indoor coil freeze up can occur due to a dirty air lter, restricted• or poor air ow, low refrigerant charge or low room or outdoor
temperatures.
is in turn can cause compressor damage.•
Should a freeze condition be detected, the compressor and outdoor• fan will be switched o for a minimum of three minutes until the
freeze condition is satised.
During this time the indoor fan will continue to run to aid in the•
defrost process.
Condensate removal (standard)
e RetroAire replacement unit (cooling operation) is designed to
eliminate condensate by slinging it onto the outdoor coil.
Condensate drains through the bulkhead to the area near the• outdoor fan.
As part of its normal operation, the unit will produce condensate• and collect it in the base pan of the unit. ere it is picked up by
the outdoor fan slinger ring and deposited onto the condenser coil.
During the cooling season, this improves the unit’s eciency by
maintaining reduced refrigeration system pressures.
Base pan has overow notches, if too much condensate is produced• notches allow condensate to ow out of the basepan and into the
wallsleeve out of the building.
Thermostatic drain pan valve (standard on heat pump units)
On heat pump models (PTHP), condensate can accumulate in the
outdoor drain pan during the heat pump cycle.
PTHP units include a thermostatic drain valve that opens when• outdoor temperatures fall below 60°F (15°C).
When the drain valve opens, condensate ows from the drain pan• onto the boom of the wall sleeve, where it drains to the outside.
is keeps the base pan free of condensate water, which could•
otherwise freeze during colder outdoor temperatures.
Random start feature (standard)
e random start feature is initiated on initial power-up or aer a
power interruption.
e controller adds a random time delay (from 5–120 seconds) on• start-up, preventing the compressor from starting.
is staggers the starting of multiple units in a single facility,• preventing a large surge that might occur if all units started at the
same time.
Anti-short cycle timer (standard)
e microprocessor control uses this timing to prevent short-cycling
of the compressor.
When the compressor cycles o on a heating or cooling call, the• controller starts a 180-second timer.
e compressor will not be allowed to start until this time has• elapsed.
On initial power-up or aer a power failure, this timing occurs aer•
the random start timing.
Power cord with integral safety protection
(standard)
All PTAC/PTHP units rated 250v or less are equipped with a
power cord with integral safety protection as standard.
Providing personal shock protection as well as arcing and re• prevention, the device is designed to sense any damage in the line
cord and disconnect power before a re can occur.
Tested in accordance with Underwriters Laboratories, the cord set• also oers a unique “passive” operation, meaning the unit does not
require reseing if main power is interrupted.
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Heat pump
Heat pump units are “Limited Range” and should be equipped with
back-up electric resistance or hydronic heat. Limited Range heat
pumps are designed to operate when outdoor temperatures are
between 75°F(24°C) and 40°F(4.4°C) and with a maximum indoor
temperature of 80°F(26.6°C). e unit is equipped with a reversing
valve that is energized for cooling and de-energized in heating mode.
Electric heating or hydronic heat will operate using the onboard con-
trol logic below the operating conditions of the heat pump.
Hydronic heating (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.
Aquastat connection(optional)
All replacement PTAC/PTHP's with hydronic heat are supplied with
a standard line volt Aquastat connection. e eld installed Aquastat
delays the fan operation until the hydronic coil reaches a temperature
of 100°F (38°C).
Motorized fresh air damper (optional)
e optional motorized fresh air damper allows fresh air into the space
to be conditioned. When the Fresh Air switch is in the "YES" posi-
tion the damper door is open and allows fresh air into the space. is
feature is only available when the indoor fan is on. When the damper
door switch is in the "NO" position, the damper door is closed and
does not allow air in the space.
Optional wall-mounted thermostats
Thermostats available from EMI
EMI oers a thermostat that is compatible with your PTAC/PTHP
unit.
Select EMI part number 240008208 from the latest RetroAire price• list for this option. is is a single stage, cool/heat, thermostat
that can be used in all RetroAire cooling, heating or heat pump
applications.
The thermostat has an adjustable setpoint range of between• 45°F(7°C) and 90°F(32°C).
For heat pumps another option is EMI part number 240008209.• is is a 2 stage heat/cool thermostat which allows for emergency
heat.
Selecting a thermostat (by others)
When selecting a thermostat other than one oered by EMI, choose
a single stage heat/cool, 24v thermostat.
Straight cooling with electric heat or hydronic heat (R10C
— PTAC's)
Select a thermostat that is compatible with a cooling/electric heat
system.
e thermostat should have “R”, “Y”, “W”, "C" and “G” terminals.
Heat pump with electric heat (R__H - PTHPs)
Select a thermostat that is compatible with a cooling/single-stage
heat/heat pump system.
e thermostat should have "R", "Y", "O" and "G" terminals. RetroAire-
units are single stage heating only.
e eleactric heat and heat pump will not operate simultaneously.
Features
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The Right Fit for Comfort 14 P/N 240008223, Rev. K [05/14/2012]

Preparing for the Installation of the PTAC/PTHP
WARNING
Moving parts can cause personal injury. Avoid contact with
moving parts when testing or servicing the unit.
Verify existing wall sleeve/enclosure:
RetroAire replacement PTAC/PTHP's are to be used with
metal wall sleeves.
e existing front panels must be secured by screws that prevent
contact with all parts.
Minor dimensions of openings must not exceed ½ inch
(12.5mm).
e indoor air discharge grill must have dimensions not less than
26” x 4”. e grill must separate the top surface of the chassis
from the top surface of the discharge grill by a minimum of 1
in (25.4mm).
For all models, the outdoor openings must prevent contact
of all moving parts by means of louvers or grills, with minor
dimension not exceeding 1 in (25.4mm).
Electrical supply
Each unit must have a separate branch circuit protected by a fuse
or breaker. Refer to the unit rating plate for the proper wire and
breaker or fuse size. Use of extension cords is prohibited.
DO NOT connect the RetroAire unit to a circuit with an
incorrectly-sized overcurrent-protection device.
All cord-connected 265-volt units must be plugged into recep-
tacles within the unit subbase or chassis.
Electrical shock hazard  Before opening the existing
unit:
Open the power supply disconnect switch. Secure it in an open
position during installation. Aach a sign stating, " DO NOT
TURN ON. "
On a plug and receptacle connection, unplug the existing unit at
the wall outlet. DO NOT plug in the new unit until installation is
complete and the start-up checklist has been completed.
Failure to comply with the above could result in severe personal
injury, death or substantial property damage.
NOTICE
All wiring should be in accordance with both the National
Electric Code (NEC) and the local building codes.
UNITS RATED 208/230V  the RetroAire unit is wired for
230v primary voltage from the factory. e transformer must
be rewired by the installer if the jobsite voltage is 208v. Change
the transformer tap from orange to red. See the wiring diagram
for details.
Electrical power connection
Check the RetroAire unit rating plate for circuit ampacity and1.
required breaker or fuse size.
Verify that the existing breaker or fuse is the correct size.2.
Replace the breaker or fuse if incorrectly-sized.a.
Breakers must be type HACR only.b.
Cord-connected units  verify that the wall outlet is the correct3.
rating. e outlet's blade conguration must match that of the
cord supplied with the RetroAire unit.
Hard-wired units  verify that the power wiring is correctly sized.4.
Inspect the existing wiring for any deciencies, such as cuts or
frayed wires. Replace such wiring if found.
Remove the old chassis
Disconnect power or unplug cord before proceeding.1.
See WARNING at le.
Remove the front of the existing room enclosure to expose the2.
old chassis.
Loosen any tie-down bolts or screws and remove the old chassis.3.
NOTICE
Dispose of the old chassis following existing state and federal
regulations.
Inspect the wall sleeve/cabinet for any rust, holes, or damage.4.
Clean the wall sleeve of any dirt.a.
Repair any damage.b.
Ensure proper drainage of condensate or rainwater to exteriorc.
of building.
Remove or repair the old weather seals and make note of the5.
location for the installation of any new seals.
Check the wall sleeve/cabinet to ensure all drain holes are open6.
and that:
e wall sleeve/enclosure is level le to righta.
e back is pitched to the outside by ½in (12.5mm) maxi-b.
mum.
Before installing the new chassis, inspect the outdoor louver for a7.
minimum free area of 70% and remove any obstructions. Obstruc-
tions will restrict air ow over the condenser coil and may cause
serious damage to the chassis. It will also void the warranty.
See the instructions for the specic RetroAire unit on the fol-8.
lowing pages.
DO NOT9. connect power to the unit or plug in the cord until all
instructions in this manual have been followed.
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Installation Instructions — R15C
Installation
Verify the existing wall thickness1.  e distance from the
condenser coil to the outdoor louver varies with sleeve depth,
unit(s) ship standard with several sets of baes. In addition, EMI
stocks an optional condenser-side air bae kit for chassis instal-
lation in deeper-than-standard wall sleeves. For fast, trouble-free
installation, know your wall sleeve depth when ordering.
Install the baes2.  Remove sets of baes from the kit bag
supplied with unit. Install only one set of le and right side baes
on the condenser coil by completing steps below :
Choose the proper ing baes for your application by verifying•
selected baes come in contact with the outdoor louver.
Install Top bae•
Make sure the baes are directed inward toward the center of•
coil (see Figure 11).
Secure baes tightly into the existing holes of the condenser coil•
using the screws provided.
Contents of Install Kit
(1) Top Bae
(2) Size 1 left and right baes only
(2) Size 2 left and right baes
(2) Size 3 left and right baes
(2) Size 4 left and right baes
Install Thermostat Bulb and lter3. 
Insert grommets into clips.•
Insert Sensing bulb into grommets.•
Insert ermostat Bulb assembly into middle section of indoor•
coil. (see gure 12)
Fasten lter using velcro strips.•
Install the foam tape4.  Apply ” x ” open-cell foam strips
to both weather angles, this prevents outside air from entering
around the chassis to the room from the sides (see Figure 13).
Install 1" x 1" open cell foam to back of unit above condenser coil.
It is imperative to have a solid air seal between the wall sleeve and
the chassis. Failure to do so will result in air leakage from outdoor
to indoor causing system problems(example — coils eezing, short
cycling, and constant running of unit). If there is a need for more
foam than supplied in kit, consult the factory.
Contents of install kit
(3ft) 1"x 1" Open cell foam
(5ft) 1/2" x 1/2" Open cell foam
(6.6ft) 1" x 1/2" Open cell foam
Connecting the optional hydronic coil controls5.  If the
hydronic heat option has been ordered, then the hydronic coil
will need to be eld installed on the new unit. Hydronic coils
are not factory installed and need to be ordered. e coil with
the old unit can be located in the subbase, under the chassis in a
special aachment, or above the chassis in a special aachment.
It is necessary to know where the coil is to be located and the
physical size of the coil so the new coil can be veried if ordered
for replacement. e new coil should be installed in the same
manner as the coil it is replacing.
Remove the 4-position connector assembly from kit bag supplied•
with unit (this will have 2 yellow wires aached).
Connect this 4-position connector to the 4-position connection•
located on the front of the unit.
Splice the yellow wires to the valve motor using 2-crimp pop-•
corns.
Connecting the accessory Aquastat6.  If the accessory
Aquastat has been ordered then it will need to be eld installed.
Remove the black jumper wire located on the front of the unit•
(this is terminated with a 2-position connector).
Cut the jumper wire in the middle and splice the Aquastat to the•
jumper., using 2-crimp popcorns.
Place the connector back into original location. Refer to the wir-•
ing diagram on the unit for details.
Secure the chassis7.  Ensure all seals are in the proper loca-
tions, the correct baesareaached to the condenser coil, and in
the proper orientation, then slide the unit into nal position and
tighten any tie down bolts or screws as necessary.
Hard-wired units8.  If the unit is hard wired, follow the in-
structions on page15 to verify existing wiring and overcurrent
protection. Remove the line cord wires from the PTAC/PTHP
power entrance terminals. Route the power supply wiring through
a strain-relief bushing and connect leads to the power entrance
terminals. Secure the strain-relief clamp. (If wiring is through
conduit, insert the conduit through the control box knockout
and secure in place.) DO NOT turn on power until completing
instructions in "Final Inspection and Startup" on page 32.
DO NOT PLUG IN the line cord, if in used condition9. .Follow
instructions in "Final Inspection and Startup" on page 32.
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

LQ
PP


LQ
PP
LQ
PP
LQ
PP






LQ
PP
LQ
PP
LQ
PP
Baes
Installation Instructions — R15C (continued)
Foam open cell 1/2" x 1/2" Both Sides of
unit (type41 weather angle shown)
Foam open cell
1" x 1"
Figure 10 R15C/R15H chassis and installation kit con-
tents
Figure 11 Baes
Weather angles can be reversed to change osetFigure 12
Figure 13 Direction of baes and foam installation
Top View of Baes
Sensing
Bulb
Type 25
Weather-
Angle Type 41
Weather-
Angle
Size 1
Size 3
Size 2
Size 4
Velcro
strips
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P/N 240008223, Rev.K [05/14/2012] 17 Made in USA

1. Remove existing wire ties holding shown wires on blower deck
2. Guide wire harness and 4 position molex from B15 into R15 chassis plenum as show bellow
Installation Instructions — B15C
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The Right Fit for Comfort 18 P/N 240008223, Rev. K [05/14/2012]

3. Rear view of installed B15 wire harness and 4 position molex
4. Front view of R15 Unit with installed B15 wire harness and 4 position molex
YELLOW
WIRE TO
CAPACITOR MOTOR
WIRES
GREEN
GROUND
WIRE
Installation Instructions — B15C (continued)
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P/N 240008223, Rev.K [05/14/2012] 19 Made in USA

INSTALLATION FOR NEW CONSTRUCTION
Installation Instructions — R50C |R50H
Installation kit con-
tents
Installation manual•
(Size 1) le & right baes•
(Size 2) le & right baes•
” x ” open-cell foam tape•
1” x 1” open-cell foam tape•
Screws 4•
Optional hydronic heat
controls
(1) 2-position connector•
(2) Pin mate•
Optional Aquastat
Connection (Hydronic
heat option only) -
(1) 14 AWG black wire•
R50CFigure 14 |R50H chassis and installation kit contents
Installation
Verify the existing wall thickness1.  e distance from the
condenser coil to the outdoor louver varies with sleeve depth. Two
sets of air baes are included with each unit to accommodate most
installation requirements. Other air bae kits are available from
the factory (unique for applications). Know the wall sleeve depth
when ordering to ensure proper bae size.
Verify Weather Angle2.  Slide the unit into the wall sleeve.
If the supply duct on the cooling chassis does not line up with
the supply vent on the room cabinet, it is possible that factory
installed the weather angles on the top and the sides will have to
be reversed. is will allow approximately 1” of adjustment for
alignment with the supply vent when mounting the unit to the
wall sleeve (see Figure 14 and Figure 15). Slide the unit back in
the wall sleeve to verify proper t.
BaesFigure 15
Weather Angle reversed to change offset
Install the baes3.  Slide the unit back out of the wall sleeve.
Remove both sets of baes from the kit bag supplied with unit.
Install only one set of le and right side baes on the condenser
coil by completing steps below :
Choose the proper ing baes for your application by verifying• selected baes come in contact with the outdoor louver.
Make sure the baes are directed inward toward the center of• coil (see Figure 16).
Secure baes tightly into the existing holes of the condenser coil•
using the screws provided.
Adjustable Weather Angle
Dimension "A" 8 5/8” 7 7/8” 9 11/16” (1) 8” (2)
Dimension "B" 9 1/2” 10 1/4” 8 7/16” (1) 10 1/8” (2)
Dimensions are calculated without foam gaskets.
(1) Standard position — Factory installed.
(2) Position for Climate Master 702 and 703.
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The Right Fit for Comfort 20 P/N 240008223, Rev. K [05/14/2012]