Unico IS12MPA iSeries User manual

Bulletin 30-122.2014.04.006 1 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
INSTALLATION INSTRUCTIONS
- High-wall indoor unit -
OPERATING LIMITS
Cooling Maximum conditions
Outdoor temperature : 122 °F (50°C) D.B.
Room temperature : 90 °F (32°C) D.B.
73 °F (23°C) W.B.
Heating Maximum conditions
Outdoor temperature : 75 °F (24°C) D.B.
65 °F (18°C) W.B.
Room temperature : 91 °F (27°C) D.B.
Cooling Minimum conditions
Outdoor temperature : 5 °F (-15°C) D.B.
Room temperature : 50 °F (10°C) D.B.
17 °F (6°C) W.B.
Heating Minimum conditions
Outdoor temperature : -25 °F (-32°C) D.B.
Room temperature : 41 °F (5°C) D.B.
Item
Qty
Description
1
1
Remote control
2
2
AAA batteries
1
2
A - B - C - D = indoor unit size
Size
Indoor Unit Model Number
A
IS12MPA
B
IS24MPB
ACCESSORIES SUPPLIED WITH THE WALL MOUNT INDOOR UNIT
Power Supply:
208-230V, 1 ph, ~ 60 Hz
Outdoor - Indoor unit combinations:
See Outdoor unit installation manual.

Bulletin 30-122.2014.04.006 2 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
IMPORTANT!
Please read before installation
This air conditioning system meets strict safety and operating
standards.
For the installer or service person, it is important to install
or service the system so that it operates safelyand efficiently.
For safe installation and trouble-free operation, you
must:
•Carefully read this instruction booklet before beginning.
•Follow each installation or repair step exactly as shown.
•Observe all local, state and national electrical codes.
•Pay close attention to all warning and caution notices
given in this manual.
•The unit must be supplied with a dedicated electrical
line.
WARNING
This symbol refers to a hazard or unsafe practice which
can result in severe personal injury or death.
CAUTION
This symbol refers to a hazard or unsafe practice which
can result in personal injury or product or property damage.
If necessary, get help
These instructions are all you need for most installation
sites and maintenance conditions.
If you require help for a special problem, contact our
sale/service outlet or your certified dealer for additional
instructions.
In case of improper installation
Themanufacturer shall in no way be responsible for improper
installation or maintenanceservice, including failure to follow
the instructions in this document.
SPECIAL PRECAUTIONS
•During installation, connect before the refrigerant system
and then the wiring one; proceed in the reverse order
when removing the units.
WARNING
When wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED ELECTRICIAN
SHOULD ATTEMPT TO WIRE THIS SYSTEM
•Do not supply power to the unit until all wiring and tubing
are completed or reconnected and checked, to ensure
the grounding.
•Highly dangerous electrical voltages are used in this
system. Carefully refer to the wiring diagram and these
instructions when wiring.
Improper connections and inadequate grounding can cause
accidental injury and death.
•Ground the unit following local electrical codes.
•TheYellow/Green wire cannot be used for any connection
different from the ground connection.
•Connect all wiring tightly. Loose wiring may cause
overheating at connection points and a possible fire
hazard.
•Do not allow wiring to touch the refrigerant tubing,
compressor, or any moving parts of the fan.
•Do not use multi-core cable when wiring the power supply
and control lines. Use separate cables for each type of line.
When transporting
Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your knees
when lifting to reduce strain on your back. Sharp edges or
thin aluminum fins on the air conditioner can cut your fingers.
When installing...
... In a ceiling or wall
Make sure the ceiling/wall is strong enough to hold the unit-
weight. It may be necessary to build a strong wooden or
metal frame to provide added support.
... In a room
Properly insulate any tubing run inside a room to prevent
"sweating", which can cause dripping and water damage to
walls and floors.
... In moist or uneven locations
Use a raised concrete base to provide a solid level
foundation for the outdoor unit.
This prevents damage and abnormal vibrations.
... In area with strong winds
Securely anchor the outdoor unit down with bolts and a
metal frame. Provide a suitable air baffle.
... In a snowy area (for heat pump-type systems)
Install the outdoor unit on a raised platform that is higher than
drifting snow. Provide snow vents.
When connecting refrigerant tubing
•Keep all tubing runs as short as possible.
•Use the flare method for connecting tubing.
•Apply refrigerant lubricant to the matching surfaces of
the flare and union tubes before connecting them; screw
by hand and then tighten the nut with a torque wrench
for a leak-free connection.
•Check carefully for leaks before starting the test run.
NOTE:
Depending on the system type, liquid and gas lines may
be either narrow or wide. Therefore, to avoid confusion, the
refrigerant tubing for your particular model is specified as
narrow tube for liquid, wide tube for gas.
When servicing
•Turn the power OFF at the main power board before
opening the unit to check or repair electrical parts and
wiring.
•Keep your fingers and clothing away from any moving
parts.
•Clean up the site after the work, remembering to check
that no metal scraps or bits of wiring have been left inside
the unit being serviced.
•Ventilate the room during the installation or testing the
refrigeration system; make sure that, after the installation,
no gas leaks are present, because this could produce
toxic gas and dangerous if in contact with flames or heat-
sources.

Bulletin 30-122.2014.04.006 3 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
Installation site selection - Indoor unit
AVOID
•Direct sunlight.
•Nearby heat sources that may affect unit
performance.
•Areas where leakage of flammable gas may be
expected.
•Locations where large amounts of oil mist may occur
(such as in kitchen or near factory equipment) because
oil contamination can cause operation problems and
may deform plastic surfaces and parts of the unit.
•Unsteady locations that will cause noise or possible
water leakage.
•Locations where the remote control unit will be
splashed with water or affected by dampness or
humidity.
•To make holes in areas where electrical wiring or
conduits are located.
DO
•Select an appropriate position from which every corner
of the room can be uniformly cooled.
•Select a sufficiently strong location to support the
weight of the unit.
•Select a location where tubing and drain hose have
the shortest run to the outside.
•Allow access for operation and maintenance as well
as unrestricted air flow around the unit.
Installation site selection - Outdoor unit
AVOID
•Heat sources, exhaust fans.
•Direct sunlight.
•Damp, humid or uneven locations.
•To make holes in areas where electrical wiring or
conduits are located.
DO
•Choose places as cool as possible and well
ventilated.
•use lug bolts or equal to bolt down the unit, reducing
vibration and noise.
•Deoxidized annealed copper tube for refrigerant tubing connecting the units of the system; it has to be insulated with
foamed polyethylene, minimum thickness 5/16 inch (8 mm).
INDOOR UNIT SIZE
SMALL TUBE (LIQUID LINE)
LARGE TUBE (VAPOR LINE)
OUTER DIAMETER
MIN. THICKNESS
OUTER DIAMETER
MIN. THICKNESS
A
0.25" (6,35 mm)
0.031" (0,8 mm)
0.375" (9,52 mm)
0.031" (0,8 mm)
B
0.25" (6,35 mm)
0.031" (0,8 mm)
0.500" (12,70 mm)
0.031" (0,8 mm)
•Refrigerant: R410A (if length exceeds standard pre-charge amount)
•Drain line (if needed): Plastic tubing (I.D. 3/4 inch [18 mm]).
•Lubrication oil for flare connections (about 1 oz. [30g]).
•Communication cable: 2-wire shielded cable, 18 ga. (minimum)
•Electric wire: use insulated copper wires per local codes.
•Tubing insulation
Tools required for installation (not supplied)
1. Standard screwdriver
7. Hacksaw
12. Tube flaring tool
2. Phillips head screwdriver
8. Drill bits 5/16" (8 mm) dia.
13. Torque wrench
(Yellow Jacket #60650 or equal)
3. Knife or wire stripper
9. Hammer
14. Adjustable Wrench
4. Tape measure
10. Drill
15. Reamer (for de-burring)
5. Level
11. Tube cutter
16. Hex. key
6. Sabre saw or hole saw
See Outdoor unit installation manual
ADDITIONAL MATERIAL REQUIRED FOR INSTALLATION (NOT SUPPLIED)
TUBING DESIGN LIMITS

Bulletin 30-122.2014.04.006 4 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
Minimum operation and maintenance area.
Remove and discard the set screw on the rear panel.
Press the 2 marks on the frame cover and disengage
the stationary tabs from the frame.
The unit can be connected in five directions: right-
rear, left-rear, left-side and right-downward.
Tubing connections from the rear. Use the rear panel
as a template. Check the horizontal position with the
level. Mark the holes to be made.
Drill a 2.5 inch (65 mm) diameter hole. Insert a 2 inch
PVC pipe and secure in place.
Prepare wall for attachment of rear panel. Use
anchors (not included) as appropriate.
Use the screws to fix the rear panel to the wall. Make
sure the panel is flush against the wall and level. Any
space between the wall and unit will cause noise and
vibration.
6.0 (150)
B
A
6.0
(150)
10.0 (250)
2.0
(50)
80.0 (2000) 6.0
(150)
67.0 (1700)
43.7 (1110) 30.0 (760)
A B
A ll d im e n s io n s in in c h e s (m m ).
ø 3/16"
(5 mm)
NO NO
YES
INDOOR UNIT
A
B
E
C
F
G
H
D

Bulletin 30-122.2014.04.006 5 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
The indoor unit can be installed without removing the
front panel. If necessary, remove the set screws
placed under the two little covers.
Disengage the front panel through a screwdriver
pressing the three shown marks. Remove the front
panel by sliding it up.
To install the front panel again, insert it in the lower
side of the unit and align it with the blocking points.
Then push lightly on the shown marks (arrows).
Tubing connections on right or left side. Cut a corner
of the frame.
The refrigerant tubes and drain hose are on the right
side of the unit. The drain tray is supplied with two
outlets with tube on the right side and rubber plug on the
left side.
How to reverse the drain hose position. Remove the
drain hose by turning it counterclockwise, then
remove the rubber plug on the other side of the unit.
Replace them inverting their position, use a screwdriver to
place the plug correctly.
Running power wires plus ground wire from indoor to
outdoor unit (use table to determine wire size).
60°
TO SLIP ON
TO REMOVE
I
J
K
L
M
N
O

Bulletin 30-122.2014.04.006 6 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
Open the front panel of the unit. Remove the cover
plate screw to reach the terminal strip.
Insert the wires from the back, secure them with a conduit
connector mounted in the knockout, and connect them to
the power terminals.
There are two conduit connection holes on the rear of the
unit. Use the ¾ inch (22 mm) hole for the power lines and
use the ½ inch (12.7 mm) hole for the communication
cable.
RIGHT REAR TUBING
Insert refrigerant tubes and drain hose of the unit into the
hole in the wall then hang the unit on the panel previously
mounted on the wall.
Connect the line set to the refrigerant tubing on the outside
of the wall (refer to outdoor unit installation manual for
instructions for making flare connections).
LEFT REAR TUBING
Insert the tubes connecting the units from the outside, then
bend them right and remove the interior removable part of
the frame. Hang the unit and extend the support on the
back of indoor unit to make the connection easier.
Make a flare on the end of the line set and connect the
line set (refer to the outdoor unit installation manual for
instructions for making flare connections).
Push lightly to fix the unit to the rear panel.
P
Q
R
S

Bulletin 30-122.2014.04.006 7 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
Prepare the terminals of the wire to connect to the
terminal strip, connect them and secure the wiring
with clamp provided. (See wiring diagrams).
WARNING
Loose wiring may cause the terminal to overheat or result
in unit malfunction. A fire hazard may also exist. Therefore,
be sure all wiring is tightly connected.
Install the condensate drain to the outside with a
positive slope. The condensate can then be carried
away in a channel or collected into a reservoir so that it will
evaporate. A trap may be installed in the condensate line to
prevent air movement in the line.
Remove the front panel.
Fill the tube and verify that the condensate can flow
correctly. Reassemble the grille according to “L”.
T
U
V
W

Bulletin 30-122.2014.04.006 8 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
Cable B must be shielded cable, 18 AWG (minimum)
Outdoor units
MODEL
Power Supply
Full Load
Current
Minimum Circuit
Ampacity (MCA)
Maximum
Overcurrent
Protection (MOP)
IS18G50
1 phase, 60 Hz
208-230 V
10.0
13
20
IS24G65
12.5
16
25
IS30G80
16.0
20
35
IS36G110
22.0
28
50
Indoor units
MODEL
Power Supply
Full Load
Current
Minimum Circuit
Ampacity (MCA)
Maximum
Overcurrent
Protection (MOP)
IS12MPA
1 phase, 60 Hz
208-230 V
0.5
*
*
IS24MPB
0.5
*
*
* Not fused separately. Connect directly to outdoor unit.
TO OUTDOOR UNIT
POWER SUPPLY
AC 208-230V
1 PHASE 60 Hz
A
B
WIRE LENGTH, SIZE
WIRING DIAGRAM

Bulletin 30-122.2014.04.006 9 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
To ensure that the air conditioner operates correctly, DO NOT install the remote control unit in the following places:
In direct sunlight.
Behind a curtain or other places where it is covered.
More than 25 ft (8 m) away from the air conditioner.
In the path of the air conditioner’s airstream.
Where it may become extremely hot or cold.
Where it may be subject to electrical or magnetic noise.
Where there is an obstacle between the remote control unit and the air conditioner
Wall Mounted Position
Momentarily place the remote control unit in the desired mounting position.
Verify that the remote control unit can operate from this position.
Fix the support at the wall with two screws and hang the remote control unit.
To reset the indoor unit to default (factory) setting, set the remote control as follows:
Filter: ON
Night Mode / High Power Mode: OFF
Operation mode: AUTO
Flap: AUTO
Set-point: 50 °F (10°C)
After setting the remote, press the FAN and IFEEL keys for more than 5 seconds, then release them
while pointing the remote control towards the indoor unit. If the setting is correct you will hear the
indoor unit beep 4 times. To enable the reset values, cycle the power by switching the unit OFF and
ON the air conditioner to enable. This completes the process and the unit will continue to function with the default factory
settings.
Pump down means collecting all refrigerant gas in the system back into the outdoor unit without losing gas. Pump down is
used when the unit is to be moved or before servicing the refrigerant circuit.
REMOTE CONTROL INSTALLATION
DEFAULT SETTING RESET
PUMP DOWN (See outdoor unit installation instruction)

Bulletin 30-122.2014.04.006 10 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
The remote communicates to the indoor unit with one of four different channels. Both need to be set to the same channel to
talk. The default is channel 1. If you have two indoor units in the same room and want to control them separately with their
own controller, they must each use a different channel. Set the remote controller as shown in the table.
WARNING
Disconnect the power
1. Disconnect the power of indoor unit.
2. Remove the batteries from the remote control unit.
3. Set the micro switches (see table). The switches are located in the battery compartment.
4. Insert the batteries in the remote control unit.
5. Set the channel in the indoor unit to match the same channel (see table).
REMOTE CONTROLLER
WALL MOUNT UNIT
CHANNEL
1
FACTORY
DEFAULT
1=OFF 2=OFF 3= OFF
4=OFF 5=ON 6=ON
SW1:
3=OFF
4=OFF
CHANNEL
2
1=ON 2=OFF
SW1:
3=ON
4=OFF
CHANNEL
3
1=OFF 2=ON
SW1:
3=OFF
4=ON
CHANNEL
4
1=ON 2=ON
SW1:
3=ON
4=ON
OFF
SW3
SW1
OFF
SW3
SW1
OFF
SW3
SW1
OFF
SW3
SW1
REMOTE CONTROL UNIT/INDOOR UNIT CHANNEL

Bulletin 30-122.2014.04.006 11 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
Set the circuit number of the indoor unit to match the circuit number the refrigerant lines are connected to. Set the
communication channel using the micro switches on the circuit board inside the control box.
Disconnect the power of indoor unit.
Set the micro switches (see table below).
Switch on the indoor unit.
At this point the system will operate with the new address.
OUTDOOR
UNIT
CIRCUIT
(PORT)
WALL MOUNT UNIT
CONTROL BOARD
FACTORY
DEFAULT
SW1:
1=OFF
2=OFF
SW1:
1=ON
2=OFF
SW1:
1=OFF
2=ON
SW1:
1=ON
2=ON
OFF
SW3
SW1
OFF
SW3
SW1
OFF
SW3
SW1
OFF
SW3
SW1
OUTDOOR UNIT REFRIGERANT CIRCUIT NUMBER (Method A –Using DIP switches)

Bulletin 30-122.2014.04.006 12 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
The circuit number can also be set by using the iSERIES remote. To set the circuit, follow these steps:
1. Power the indoor unit ON (or outdoor unit if power is from the outdoor unit).
2. Set the remote controller according to the table below.
3. Press the FAN and IFEEL keys of the remote controller at the same time and hold for more than 5 seconds, then
release them while pointing the remote control towards the indoor unit to be set.
If the setting is correct, you will hear 4 BEEPS as confirmation and the indoor unit starts operating with the new address.
After the wiring and piping is complete, verify that the system is fully communicating to each device.
1. Power ON the system.
2. Set the remote controller of unit 1as follows (units 2, 3, and 4must be OFF):
Mode: cooling
Filter: ON
Set point: 90 °F (32 °C)
3. Press FAN + IFEEL button for at least 5 seconds, pointing the remote control unit directly at the air conditioner
receiver.
System starts and runs for 3 minutes.
During this operation TIMER LED is flashing, while OPERATION LED is ON.
After 3 minutes operation:
If the setting is right, the unit switches to COOL mode and stops (set point: 90 °F [32 °C]). The system is ready to
operate.
If the setting is wrong, the STANDBY lamp flashes; check the setting of indoor units and the connections of the
refrigerant circuits.
button settings to select the Circuit number
Circuit 1Circuit 2Circuit 3Circuit 4
ON
OFF
AUTO
52 °F (11 °C) 54 °F (12 °C) 55 °F (13 °C) 57 °F (14 °C)
ON ON ON
OFF OFF OFF
AUTO AUTO AUTO
AUTO AUTO AUTO AUTO
filter
night mode / high mode
operating mode (COOL- HEAT)
set point
flap
CIRCUIT NUMBER (Method B –Using the iSERIES Remote)
VERIFY COMMUNICATIONS

Bulletin 30-122.2014.04.006 13 Copyright © 2014 Unico, Inc.
(SAC xx.xxxx.xxx.xx)
It is possible to change the temperature units from Celsius (°C) to Fahrenheit (°F) or back
again.
1. Press the GREEN button to turn ON the remote.
2. Next, press and hold the Filter/Shift button for 6 seconds to enter the Special
Functions mode. You will see the word “Filter” appear on the remote control display.
3. Press the “+” button until the number displayed reaches 77. The “-” button can also be
used to reach 77, but this will not change the display from Celsius to Fahrenheit, or vice-
versa.
4. To finish the switch, press and hold the Filter/Shift button for 6 seconds. This will cause the
remote to exit the Special Functions mode. The display should now have switched between
Celsius and Fahrenheit.
5. Repeating this process will cycle between Fahrenheit and Celsius display modes.
“°F” is not shown when displaying the temperature using Fahrenheit units.
“°C” will show only when temperature is in Celsius units.
Refer to the Operation manual for the remote control features and functions.
TEMPERATURE DISPLAY (UNIT OF MEASURE)
REMOTE CONTROL FUNCTIONS