Remington IM 812-2 Instruction Manual

Installation & Maintenance Data IM 812-2
Group: PTAC/PTHP
Date: April 2006
McQuay/Remington
Packaged Terminal Air Conditioners and Heat Pumps – C Vintage
®
©2006 McQuay International

IM 812 / Page 2 of 28
General Description ............................................................ 2
Warning ............................................................................... 2
Inspection ........................................................................... 2
Nomenclature...................................................................... 3
Control Features .............................................................. 4-5
Wall Opening Requirements and Unit Dimensions ............. 6
Installation of Optional Condensate Drain Kit ..................... 7
Subbase Installation............................................................ 8
Power Supply and Control Wiring....................................... 8
Wall Sleeve Installation
Thin Wall Construction ................................................. 9
Medium Thick Wall Construction ............................... 10
Table of Contents
The installer must determine and follow all applicable
codes and regulations. This equipment presents hazards
of electricity, rotating parts, sharp edges, heat and weight.
Failure to read and follow these instructions can result in
property damage, severe personal injury or death. This
equipment must be installed by experienced, trained
personnel only.
Thick Wall Construction ............................................. 11
Wall Sleeve Extension and Louver Frame......................... 12
Outdoor Louvers ............................................................... 13
Installation of Louvers and Chassis .................................. 14
Equipment Start-up .......................................................... 15
Remote Mounted Thermostat ........................................... 17
Wiring Diagrams........................................................... 18-20
Scheduled Maintenance ................................................... 21
Spare Parts ....................................................................... 21
Shipping Weights .............................................................. 22
Refrigeration Cycle ........................................................... 22
Trouble Shooting .......................................................... 23-25
General Description
McQuay®/Remington®Packaged Terminal Air Conditioners and
Heat Pumps are designed and built for through-the-wall
installation in either new or existing buildings. The self-con-
tained refrigerant system delivers cooling to the desired space.
Heating can be accomplished with electric resistance or with
reverse cycle technology (heat pump models only). Generally,
an estimate for capacity selection is 35 BTUH per square foot
of floor space (cooling) and 4 BTUH (1.25 watts) per cubic
foot (heating). The architect or engineer must verify the selec-
tion. Note that the heat pump reverse cycle generates ap-
proximately 10 BTUs per electrical watt as compared to 3.4
BTUs per watt with resistance electric heat. The unit will re-
start at its last setting after a power interruption. A complete
unit consists of the following components, ordered and
shipped separately.
1. Heating/Cooling Chassis and Front Panel.
2. Wall Sleeve.
3. Outdoor Louver.
4. Subbase – Optional for 208V and 230V units but manda-
tory for all 265V.
5. Separate plug-in power cord (selects heater size).
NOTE: Some units with fixed heaters are also available
with factory installed power cords.
6. Electrical receptacle – Optional for 208V and 230V units
but mandatory for all 265V.
7. Plug cord cover – Optional for 208V and 230V units but
mandatory for all 265V.
WARNING
!
This product was carefully packed and thoroughly
inspected before leaving the factory. Responsibility
for its safe delivery was assumed by the carrier upon
acceptanceoftheshipment. Claims for loss or damage
sustained in transit must therefore be made upon the
carrier, as follows:
VISIBLE LOSS OR DAMAGE
Any external evidence of loss or damage must be
noted on the freight bill or carrier’s receipt, and signed
by the carrier’s agent. Failure to adequately describe
such external evidence of loss or damage may result
in the carrier’s refusal to honor a damage claim. The
form required to file such a claim will be supplied by
the carrier.
CONCEALED LOSS OR DAMAGE
Concealed loss or damage means loss or damage
which does not become apparent until the product
has been unpacked. The contents may be damaged in
transit due to rough handling even though the carton
may not show external damages. When the damage is
discovered upon unpacking, make a written request
for inspection by the carrier’s agent within fifteen (15)
days of the delivery date. File a claim with the carrier
since such damage is the carrier’s responsibility.
Inspect unit nameplate to be certain the voltage is the
same as the voltage that will be delivered to the unit. The
receptacle must match the plug on the unit cord. Improper
electrical wiring can cause property damage, severe per-
sonal injury or death.
NOTICE
WARNING
!
Hazardous Voltage!
Disconnect all electric power including remote
disconnects before servicing. Failure to discon-
nect power before servicing can cause severe
personal injury or death.
Use copper conductors only. Unit terminals are not de-
signed to accept other types of conductors.
Failure to do so can damage equipment.
WARNING
!
CAUTION
!

IM 812 / Page 3 of 28
Figure 1. Exploded View of Complete Unit (Shown without subbase)
Product Nomenclature
PTAC 07 C208 F 3 C
Now that you have made an investment in modern, efficient McQuay®/Remington®equipment, its care and
operation should be a high priority. For training information on all McQuay HVAC products, please visit us at
www.mcquay.com and click on Training or phone [phone] and ask for the Training Department.
PTAC = Packaged Terminal Air Conditioner1
PTHP = Packaged Terminal Heat Pump1
07 = 7,000 Nominal BTUH Cooling
09 = 9,000 Nominal BTUH Cooling
12 = 12,000 Nominal BTUH Cooling
15 = 15,000 Nominal BTUH Cooling
C=“C” Design Vintage
208 =208-230V
265 =265V
F=FixedCord Heat2
U=Universal Cord Heat3
0= 0.0 kW No Electric Heat4
2= 2.4 Nominal kW Electric Heater5
3= 3.5 Nominal kW Electric Heater6
5= 5.0 Nominal kW (30A) Electric Heater7
Z= 5.0 Nominal kW (20A/265V) Electric Heater8
C=Chassis Mounted Control9
W=Wall Mounted Control10
Notes
1.
All chassis ship with an Installation Manual and mounting screws.
2. Factory-installed. Check notes 5 & 6 for availability.
3. Field-installed. Check notes 5 & 6 for availability.
4. Available on size 12 & 15 units only. Order Universal Power Cord
for “Cooling Only”.
5. Available with fixed cord for all 208-230V PTAC/PTHP size 07 &
09 units and for 265V PTHP size 09. Available with universal
power cord for all PTAC/PTHP size 12 & 15.
6. Available with fixed power cord on all PTAC/PTHP units.
Available with universal power cord on all PTAC/PTHP size
12 & 15.
7. Universal power cord with 30A plug for PTAC/PTHP size
12 & 15 only.
8. Universal power cord with 20A plug for 265V PTAC/PTHP size
12 & 15 only.
9. Includes control pad and mounting frame.
10. Wall Mounting Kit & Control Pad or 24V Wall thermostat &
Control Blank Off must be ordered separately. See accessory
tables.
▲
▲
▲▲
▲
▲
▲
Louver
Wall Sleeve
Chassis
Front Panel
▲
▲
▲
▲

IM 812 / Page 4 of 28
CAUTION
!
Control Features
Standard Control
Control Pad - Can be unit-mounted or can be remote wall
mounted. Remote mounting requires an accessory 35´ or 50´
low-voltage wire harness and snap-in decorative cover. The
mounting location must be away from cold drafts, discharge
air, outside walls, etc., because the room temperature sensor
is mounted in the control pad (if dip switch #2 of 4, behind the
access cover on front of the control box, is “ON”). A wireless
hand-held remote controller is also available as an accessory,
which allows control of the conditioner from anywhere in the
room.
Heat – Select by pressing the ON/OFF key to “ON” and the
MODE key to “HEAT.” Use the 왕
+or 왓
-key to set the desired
room temperature (60-85OF).
NOTE: Heat pumps will not operate in reverse cycle un-
less temperature setting is within 2oF of room tempera-
ture. Otherwise, unit will heat with electric heaters until
satisfied. The next call for heat will be reverse cycle, pro-
vided the outdoor temperature is above the 30-40oF range.
When the outdoor temperature is less than 25oF, most of
the heating will be with electric resistance. Between 25oF
and 40oF, the primary heat will be reverse cycle with occa-
sional resistance heat as required to maintain room tem-
perature. Above 40oF, all heating will be by reverse cycle.
Cool – Select by pressing the ON/OFF key to “ON” and the
MODE key to “COOL.” Use the 왕
+or 왓
-key to set the desired
room temperature (60-85OF).
Fan Only – Select by pressing the ON/OFF key to “ON” and
the MODE key to “FAN”. Press the FAN key to select high or
low speed. In this mode, only the indoor fan will operate and
there will be no heating or cooling.
Cool/Dry – Press the ON/OFF key to “ON” and the MODE key
to “COOL”. Press and hold the MODE key for 15 seconds to
activate “COOL/DRY”. Use the 왕
+or 왓
-key to set the desired
room temperature. Select this mode when the standard Cool
mode does not provide sufficient dehumidification. The com-
pressor and indoor low fan will cycle together and will operate
for longer periods of time to provide up to 70% more dehu-
midification. As a result, the room temperature differential may
increase slightly.
NOTE: COOL/DRY can not be used with SLEEP.
Fan Speed – Select fan speed by pressing the FAN key to
“AUTO”, “HIGH” or “LOW” while the unit is operating in
“HEAT”, or “COOL” mode. “AUTO” gives high fan if unit set-
ting is more than 2oF above or below room temperature and
low fan if less than 2oF above or below room temperature.
Continuous/Cycle Fan – When dip switch #8, located on front
of the control box, behind the access cover, is in the “OFF”
position, the indoor fan will operate continuously. When dip
switch #8 is in the “ON” position, the indoor fan will cycle on
and off with the compressor or heater. In cycle fan, (dip switch
#8 “ON”) the fan will start every 7 minutes to sample the room
temperature. Fan will turn off again after 2 minutes unless heat-
ing or cooling is required.
Room Freeze Protection – When dip switch #4 of 4 (located
behind the access cover on front of the control box) is "OFF",
a unit-mounted sensor will be activated to bring on the elec-
tric heater and indoor fan as required to maintain a 40o-50oF
minimum temperature. This will override “OFF”, remote “OFF”,
“COOL”, “COOL/DRY”, “FAN” and “UNOCCUPIED” modes.
When dip switch #4 of 4 is “ON”, there is no freeze protection.
Also, if using a 24V wall stat, there is no freeze protection (un-
less provided by the wall stat).
IMPORTANT NOTE: When dip switch #4 of 4 is "ON", there
is no freeze protection.
Absence of freeze protection can result in equipment and
property damage. Make certain dip switch #4 of 4 is “OFF”,
if freeze protection is required.
Wired Remote ON/OFF –The unit may be turned on by open-
ing, or off by closing, a set of dry contacts located up to 325´
from the unit using a pair of 22 ga. low voltage wires. The 22
ga. wires are connected to the unit using a plug and recep-
tacle connection under the small access cover on the front of
the control box. (A plug with 2 short wires is shipped with the
chassis and plugs into “F. DESK” receptacle) The dry con-
tacts can be a toggle switch at the front desk, a time clock,
etc. When the dry contact is closed, the unit control goes to
memory P1 which is set from the factory at 75oF in COOL
mode and high fan. If desired, P1 can be programmed for a
different setting. See instructions under “Motion Sensor & Door
Switch”, page 5. When the dry contact is opened and the unit
restarts, the control will automatically index to a Heat setting
of 68oF (if room temperature is below 68oF) or a Cool setting of
75oF (if the room temperature is above 68oF. )
NOTE: If the unit has been turned OFF by remote dry con-
tacts and the room occupant presses the ON/OFF key on
the control pad, the indicator lights will come on and the
control will start beeping but the unit will not heat or cool.
Temperature Limiting – The control temperature range as
shipped from the factory is from 60o-85oF. By using dip switches
#1-#4 of 8 (located behind the access cover on front of the
control box), the range can be changed per the following charts:
NOTE: After the limits have been set, the control display
will still show the full range of 60-85oF, however, the unit
will not heat or cool past the limits.
Min. Set Point SW #1 SW #2
60oFOFF OFF
64oFONOFF
68oF OFF ON
72oFONON
Max. Set Point SW #3 SW #4
75oFONON
78oF OFF ON
82oFONOFF
85oFOFF OFF

IM 812 / Page 5 of 28
Dip Switch Description (located behind
access cover on front of control box)
Dip SWI #1–#8
#1–#4 = Temperature Limiting – see charts, page 4.
#5–#6 = Approximate outdoor temperature when unit will au-
tomatically change from reverse cycle heating to electric heat.
#5-OFF & #6-OFF = 35oF (factory setting)
#5-ON & #6-OFF = 30oF
#5-ON & #6-ON = 25oF
#7-OFF = Normal HP operation, ON = electric heat only.
#8-OFF = Constant indoor fan, ON = Cycle
Dip SW2 #1–#4
#1-OFF = Control pad activated, ON = 24V wall stat activated.
#2-OFF = Room temperature sensor on chassis, ON = sensor
on control pad.
#3-OFF = Motion & Door sw. activated, ON = Timer and Sleep
activated.
#4-OFF = Room freeze protection is activated, ON = deacti-
vated.
NOTE: All dip switches ship from factory in the OFF posi-
tion except #8 of 8 and #3 of 4 which are shipped turned
ON. Any switch changes must be followed by unplugging
and plugging in the power cord to activate the change.
Quick Heat & Cool – This feature provides extra comfort for
the occupant during start up of an unconditioned space. When
off for more than 2 hours, the unit setting will automatically
raise 2oF in Heat or drop 2oF in Cool to offset the radiation felt
from the cold or warm walls, ceiling and floor. The 2oFoffset is
maintained for the first cycle only. After that, the setting re-
verts to that shown on the digital display.
Motion Sensor & Door Switch – (activate by dip switch #3 of
4 turned OFF) – Two receptacles under the access cover on
front of control box provide connections for the motion sen-
sor and door switch. (Motion sensor and door switch are avail-
able from your sales representative. The motion sensor is cus-
tom-made for McQuay with both “ON” & “OFF” having no
time delay. Motion sensors by others will not work.) Two plug
and wire assemblies are included with each chassis. Connect
receptacle “MOTION” to motion sensor and “DOOR” to door
switch.
While room is occupied, the motion sensor keeps the control
“normal” so the occupant has full control of the unit. Fifteen
minutes after the occupant leaves the room, the unit goes into
memory P2. 14 hours later, if no one has entered the room,
the unit goes into memory P1. Both P1 and P2 come factory
set in COOL mode @ 75oF. They can be reprogrammed for
temperature and mode by using a G11 hand held remote con-
troller available from your sales representative.
Programming P1 using the G11 control – press and hold
the upper + button for 3 seconds until P1 starts flashing on
the G11 display. While P1 is still flashing, press the buttons to
select temperature, fan speed, and mode for P1. Wait 15 sec-
onds until P1 stops flashing, then press and release the upper
+ button to send the P1 program to the unit control. P1 will
flash on the unit display to show it was accepted.
Programming P2 using the G11 control – press and hold
the upper - button for 3 seconds until P2 starts flashing. While
P2 is still flashing, select temperature, fan speed, and mode
desired for P2. Wait 15 seconds until P2 has stopped flash-
ing, then press and release the upper - button to send the P2
program to the unit control. P2 will flash on the unit display to
show it was accepted.
Control Lockout – The unit control has an electrical lockout
feature to prevent anyone from changing the mode, tempera-
ture or fan speed. To activate this lockout, press and hold the
unit FAN key for 10 seconds until LO shows on display. To
unlock the control, press and hold the FAN key for 10 sec-
onds until UL shows.
Remote Wall Thermostat
General – Remove the control pad from the unit by unsnap-
ping it from its base and unplugging it from the receptacle on
the control box front. The snap-in decorative cover (ordered
separately) now mounts in place of the control pad. To modify
the controls for Remote Wall Thermostat, slide dip switch #1
of 4 to ON. Also, unplug the power cord from the receptacle
and plug back in again to reset the circuit. Four to seven low-
voltage wires, as determined by the wall thermostat selected,
connect to the 7 pin receptacle CN2, behind the access cover,
on the control box front. Use the 7 pin plug and wire assembly
provided. Mount the thermostat on an inside wall. Avoid unit
discharge air, direct sunlight and cold drafts.
Operation – The 24V wall thermostat should have the normal
R, W, Y, and G terminals plus C if it requires 24V AC power
from the unit. By using all 7 low voltage connections, wall stats
with 2 stage heat & fan speed selection can also be used.
Stats can be MCO, ACO, MCO/ACO or programmable. With
the exception of “wired Remote ON/OFF”, the control fea-
tures listed for the standard control pad will not be available
with the wall thermostat. Low fan speed is standard for stats
without speed selection.