EMI WLHG09 User manual
WLCG/WLHG
High-Efciency Ductless Split System High-Wall Air Handlers
Straight cool / Heat pump nominal capacities
WLHG09 WLHG12 WLHG24 Units
9,000 12,000 18,000 23,800 Btuh
2.6 3.5 5.3 7.0 kW
Straight cooling only
WLCG30 WLCG36 Units
28,200 33,600 Btuh
8.3 9.8 kW
Installation, Operation and
Maintenance Manual
ECR International Inc
2201 Dwyer Ave.
Utica, NY 13501
www.enviromaster.com
An ISO 9001-2008 Certified Company
P/N 240008111, Rev. G [06/18/10]
WLCG/WLHG
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 2P/N 240008111, Rev. G [06/18/10]
Contents
To the Installer
Retain this manual and warranty for
future reference. Before leaving the prem-
ises, reviewthis manualtobesuretheunit
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 aer the installation
of this unit, contact your local representa-
tive. For a local representative listing, visit
our web site:
www.enviromaster.com
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 ___________
IMPORTANT
Shipping damage MUST
be reported to the carrier
IMMEDIATELY.
Examine the exterior. Remove
cover and examine piping for
signs of damage.
NOTICE
The EMI series high efficiency air
handler is backed by EMI and ECR
International is tested, rated, and certi-
ed in accordance with AHRI Standard
210/240-2008 and UL-1995.
Due to ongoing product development,
product designs and specications may
change without notice.
Please contact the factory for more
information.
Contents . . . . . . . . . . . . . . . . . . . . . . 2
Read Before Proceeding . . . . . . . . . . . . 3
Verify Unit Before Installing . . . . . . . . . . 4
Piston/Orifice Replacement
(when required). . . . . . . . . . . . . . . . . . 6
Mounting the Unit . . . . . . . . . . . . . . . . 7
Electrical Wiring. . . . . . . . . . . . . . . . . . 9
Refrigerant Piping . . . . . . . . . . . . . . . 14
Refrigerant Processing . . . . . . . . . . . . 17
Reassemble the WLCG/WLHG Cabinet . . 18
Initial Start-Up. . . . . . . . . . . . . . . . . . 19
WLCG/WLHG Controller Overview . . . . . 20
Setting the Controller . . . . . . . . . . . . . 22
Unit-Mounted Controller Operation . . . . 25
Wall Thermostat Operation . . . . . . . . . 29
Controller Features. . . . . . . . . . . . . . . 32
Controller Fault Conditions . . . . . . . . . 33
Maintenance. . . . . . . . . . . . . . . . . . . 34
Troubleshooting . . . . . . . . . . . . . . . . 36
Frequently Asked Questions . . . . . . . . . 40
Specifications and Dimensions . . . . . . . 42
WLCG/WLHG System Options . . . . . . . . 44
Test Unit Performance Data Sheet . . . . . 46
EMI’s Product Line . . . . . . . . . . . . . . . 47
Indoor Units . . . . . . . . . . . . . . . . . . . 47
Outdoor Units . . . . . . . . . . . . . . . . . . 47
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 3
Read Before Proceeding
Recognize this symbol as an indication of
important safety information.
WARNING
Completely read all instructions
prior to assembling, installing, oper-
ating, or repairing this product.
Inspect all parts for damage prior to
installation and start-up. e EMI se-
ries high eciency air handler must be
installed ONLY by qualied installation
personnel.
DANGER
Tampering with this unit is danger-
ous. Tampering voids all warranties.
DO NOT aempt to modify or change
this unit in any way.
DANGER
e EMI series must:
Be connected to a properly grounded•
electrical supply with the proper
voltage as stated on the rating plate.
Have proper overcurrent protection•
(time-delay fuse/HACR Breaker) as
listed on the rating plate.
Failure to follow these instructions can
result in a re, explosion, or electrical
shockcausingpropertydamage,personal
injury, or death.
Safety Instructions
is manual is intended as an aid to quali-
ed service personnel for proper installa-
tion, operation, and maintenance of the
EMI series high efficiency air handler.
Read these instructions thoroughly and
carefully before aempting installation or
operation.
Failure to follow these instructions may
result in improper installation, operation,
service, or maintenance, possibly resulting
in re, electrical shock, property damage,
personal injury, or death.
Read all instructions before using this
unit. Install or locate this unit only in ac-
cordance with these instructions. Use this
unit only for its intended use as described
in this manual.
Check the rating plate on the unit before
installation to make certain the voltage
shown is the same as the electric supply to
the unit. e rating plate is located on the
top panel only.
This unit must be connected only to a
properly grounded electrical supply. Do
not fail to properly ground this unit.
Turn o the electrical supply before servic-
ing the unit.
Do not use the unit if it has damaged wir-
ing, is not working properly, or has been
damaged or dropped.
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 4P/N 240008111, Rev. G [06/18/10]
NOTICE
Check equipment for damage prior
to installation, if damaged contact the
wholesale distributor.
Product description
The WLCG/WLHG is available as a•
(DX) direct expansion straight cool or
heat pump.
It offers a contemporary design in a•
ductless type air handler and combines
aractive appearance with high eciency
conditioning for small to medium size
commercial or residential spaces.
The WLCG/WLHG is equipped with•
unit mounted infrared compatible con-
trols which also supports 24V wall ther-
mostat operation. Optional handheld
remote is available.
Heat pump models provide up to•
24,000 Btuh of cooling and 20,600 Btuh
of heating. Electric heat options are
available for up to 5 kW of supplemental
heat.
is air handler oers ease of installation,•
operation, and service.
It can be matched with EMI’s:•
Single-zone condensing units –
S1CG/S1HG 09–24 and S1CG
30-36.
Dual-zone condensing units –
S2CH/S2HH side discharge.
Multi-zone, top discharge condens-–
ing units T2CG/T2HG, T3CG/
T3HG, or T4CG/T4HG.
All EMI air handlers are backed by ECR•
International Inc. and are tested, rated,
and certied in accordance with AHRI
standards 210/240-2008 and UL 1995.
Verify Unit Before Installing
Controls and components
(Factory-installed or supplied)
Large LCD Backlit Display•
Single unit-mounted control package,•
congurable to either unit mount or wall
thermostat operation, increasing installa-
tion exibility.
NOTICE
Unit mount control — If the control is
congured for unit mount control DO
NOT connect a wall thermostat to the
unit. See Figure 28, Page 22.
Unit mount control can be used in cool-•
ing only, cooling with electric heat, heat
pump, or heat pump with second stage
electric heat applications.
Operational range set point temperature•
adjustable between 55°F(13°C) and 90°F
(32°C)in one-degree increments.
Infrared-compatible controller allows use•
of optional IR hand held controller.
NOTICE
Unit-mounted controls are fully func-
tional without the handheld remote.
Operation modes include Heat, Cool,•
Dry, Fan and Auto Change-over.
Fan Operation – Auto/On. High or Low•
speed fan
Fan Purge – Fan remains on for 60 sec-•
onds aer Heat/Cool call is dropped for
improved eciency (Auto mode only)
Room air sampling Selectable time•
intervals ensure the fan will cycle on peri-
odically, in Auto Fan Mode to help elimi-
nate room temperature stratication.
SelectableFahrenheit(°F)orCelsius (°C)•
temperature scale.
Drymode– Operatescoolingandelectric•
heat simultaneously to remove humidity.
Optional electric heat must be selected.
Anti-Short Cycle Compressor Protec-•
tion.
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 5
Verify Unit Before Installing (continued)
Minimumon timefor heatingandcooling•
Helps eliminate room temperature droop
and system short cycling.
Freeze Protection – Prevents air handler•
freeze up.
Test operation – Allows ease of testing af-•
ter installation (all timers are reduced).
Non-volatile back-up memory will main-•
tain control seings for an indenite pe-
riod during a power outage. When power
is restored the equipment will resume
operation aer a three-minute compres-
sor time delay.
7-day programmable with copy feature.•
Filter change indicator: A timer feature•
indicateswhenthe ltershouldbecleaned
according to the selected time.
Motorized supply louver with optional•
sweep or six stationary seings.
Modular design – reduces parts required•
for control package. Deco panel, relay
board, ribbon cables and microprocessor
are combined into one package.
Integral condensate pump safety-switch•
connection where-by the microproces-
sor monitors the condensate pump safety
switch and displays an error code when a
fault occurs. (Applies only with optional
condensate pump)
CEC (California Energy Commission)•
compliant
Condensate drain pan over ow protec-•
tion
Cabinet Features:
Durable ABS plastic cabinet with a galva-•
nized steel sub-chassis.
Easily accessible, washable, reusable,•
nylon mesh lter.
Horizontal discharge louver, constructed•
of high temperature ABS plastic, that can
be set to oscillate, or can be parked in six
pre-set positions.
Manually adjustable vertical discharge•
ns.
Easy access to pipe chase area from cabi-•
net boomallowspipingconnections and
condensate pump installation with the
unit mounted on the wall.
Easily removable end-cap for access to•
control area for installation and service.
Condensate drain pan constructed of gal-•
vanizedsteel (G90U), withanti-corrosion
coating.
Modular snap-in, 7-day programmable•
control with large backlit LCD display,
a “Change lter” display feature and se-
lectable Fahrenheit (°F), or Celsius (°C)
temperature scale.
Optional Equipment
Condensate pump (eld installed only)•
24V wall thermostat•
Electric heat with automatic reset high•
temperature cutout and redundant high
temperature fuse link (when heat option
is selected, factory installed only)
Hand-held infrared controller.•
Installer Supplied Items
Low voltage wiring (18 AWG minimum•
required)
High voltage power supply wiring•
Mounting screws and fasteners•
Condensate piping•
Refrigerant piping (if not supplied)•
Refrigerant (for interconnect charge)•
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 6P/N 240008111, Rev. G [06/18/10]
Piston/Orifice Replacement (when required)
NOTICE — WLHG24 ONLY
Piston/ Orifice replacement e factory-installed piston/orice must be replaced on
Air-Handler / Condenser combitnations noted in table below . All other applications are
to use the factory-installed orice. To replace the orifce in the noted models use instruc-
tions and chart as follows.
Replacing the piston/orifice
Follow the instructions on page 9 to remove the le end cap.1.
e piston orice (Figure 1, pg. 6) is located in the upper le corner of the unit.2.
Disassemble the orice joint, remove the factory-installed orice, and replace with the3.
orice listed in Figure 1 (supplied in the Kit Bag). Make sure o-ring is in good condition
and properly installed.
e end cap can remain o while mounting and installing the unit.4.
Piston/orifice replacementFigure 1
Model Condenser Factory-installed orifice size
(Inches)
Replacement orifice size
(Inches)
WLH_24 T2C/T2HG2400
T2C/T2HG4400
T3C/T3HG2240 0.054” 0.056”
WLH_24 T2C/T2HG9800
T2C/T2HG8800
T3C/T3HG9980 0.054” 0.049”
WLHA12
T2C/T2HG2400
T3C/T3HG2240
T3C/T3HG2220
T4C/T4HG9992
T4C/T4HG9922
T4C/T4HG2222
0.042” 0.044”
WLH_24 S1C/S1HG8000 0.054” 0.047”
To Air
Handler
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 7
Mounting the Unit
Before installing, consider:
Determinethebestlocationformounting•
the unit for room air circulation.
Locate outdoor and indoor units as close•
together as possible.
Determine how power wire (high and•
low voltage) condensate drainage, and
refrigerant piping may be run to and from
the unit.
WLCG/WLHG - Ensure that intercon-•
nect tubing is within the limits given in
(Table 1, pg. 7)
Tubing specificationsTable 1
S1CG
or
S2CG
Model
Max.
Length
Equivalent
Feet
Max.
Lift
Max.
Trap
Height
Liquid
Line
Suction
Line
“H” “P” O.D. O.D.
09 50’
(15 m)
20’
(6 m)
15’
(5 m)
1/4" 1/2"
12 1/4" 1/2"
18
100’
(30 m)
35’
(11 m)
20’
(6 m)
3/8" 5/8"
24 3/8" 3/4"
30 3/8" 3/4"
36 3/8" 3/4"
To ensure serviceability and proper air•
distribution, the unit should be posi-
tioned as close as possible to the center
(left-to-right) of the wall. Minimum
distance from the ceiling is stated on the
template provided with the unit packag-
ing. e cabinet le and right end caps
must be accessible for removal without
obstruction. (See Figure 2, Page 7.)
Site preparation
eWLCG/WLHGmustbemountedplumb
and level to a vertical surface to prevent unit
vibration and/or unwanted noise. It is recom-
mended that the unit be mounted directly to a
NOTICE
If excessive noise or vibration is experi-
enced from a unit mounted to a masonry
block wall, check to ensure the unit is
plumb and level. If noise or vibration per-
sists, contact the wholesale distributor.
Minimum service clearancesFigure 2
CEILING
WALL
WALL
4” Minimum
10”
Minimum 6”
Min.
Mounting templateFigure 3
NOTICE
Piping may be roughed in before wall-
board or panels are placed in new con-
struction. PVC pipe (3” or 4” I.D.) may
be used as a pipe chase.
smooth surface such as Sheetrock® wallboard
or similar material. If mounting to a masonry
block wall, there should be a smooth bar-
rier between the unit and the masonry block
surface to absorb any potential vibration and
prevent the formation of condensate on the
wall.
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 8P/N 240008111, Rev. G [06/18/10]
Mounting the Unit (continued)
Unit Mounting Instructions
Aer determining the best location for1.
the unit, use the cardboard template
provided in the packaging (Figure 3,
Page 7).
Mark where the piping, electrical wiring2.
and condensate drain should penetrate
the wall.
Determine the appropriate hole size and3.
cut through the wall.
Use the supplied wall bracket. For4.
shipping purposes, the wall bracket is
fastened to the back of the unit.
Secure the bracket to the wall with5.
the appropriate screws (for wood) or
anchors (for masonry). Ensure the
bracket is mounted in a manner that will
support the weight of the unit (Figure 4,
Page 8).
To mount the unit to the bracket, align6.
the mounting slot on the back of the
unit over the bracket and make certain
it ts properly (Figure 5, Page 8).
WARNING
Replace all panels aer installation or
servicing. Panels must remain on the
unit at all times while powered and in
operation.
Wall hanging bracketFigure 4
Remove and discard
these screws
NOTICE
e wall hanging bracket is not located
in the center of the unit.
Mounting to wall bracketFigure 5
Mounting
slot Slot for piping
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 9
Electrical Wiring
Before removing end capFigure 6
Helpful Tip:
Prior to remov-
ingthe end
capand
bottom
use a
small
board to
propthe unit
away from the wall.
Removing end cap
Figure 7
Rotate louver down to exposeFigure 8
screw
NOTICE
All electrical wiring must be run accord-
ing to NEC and local codes.
Site preparation for wiring
WARNING
Electrical shock hazard Make sure the
power is o before proceeding.
Check the unit rating plate for minimum1.
circuit ampacity and breaker or time delay
fuse size. Use only HACR type breakers.
Select the proper wire for the ampacity
rating.
Each unit must have a separate branch2.
circuit protected by a time delay fuse or
breaker. Refer to the unit rating plate for
the proper wire and breaker or time delay
fuse size.
Inspect the existing wiring for any defects3.
such as cut or frayed wires. Replace if any
such wiring if found.
e le end cap of the unit needs to be4.
removed to access wiring diagram and
electrical wiring. is requires removal
of three screws (Figure 6, Page 9 and
Figure 7, Page 9).
Rotate louver down to expose the third5.
screw (Figure 8, Page 9).
Once the screws are removed, slide the6.
le end cap o to expose control box and
locate the wiring diagram on the inside
of the end cap.
NOTICE
On units rated 208/230V, the primary
side of the transformer is factory wired
for 230V. For a 208V power supply,
the transformer tap must be changed
from orange to red. Refer to the wiring
diagram located on the inside of the le
end cap of the unit.
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 10 P/N 240008111, Rev. G [06/18/10]
Electrical Wiring (continued)
Wiring diagram locationFigure 9
Control box Remove screw
Wiring connectionsFigure 10
Low Voltage
Connections
Ground
L1
L2
Connect wiring
To access High and Low volt wiring re-1.
move the screw on the front of the control
box. (Figure 9, pg. 10)
High voltage electrical wiring
Refertothewiring diagramtoconnectthe1.
power wire to Black L1 and the other wire
to Red or White (115V) L2 at the power
connector location. (Figure 10, pg. 10)
Connect the ground wire to the ground2.
lug or lead at the same location in the
control box.
WARNING
Terminate ALL unused wires with a wire
nut or crimp connector.
Low voltage electrical wiring
(for unit-mounted controls)
The 24V control transformer is located1.
in the air handler. is provides low Volt
control power to both the air handler
and condenser. Depending on the mod-
els selected, the low volt interconnect
control wiring may be eected. (Figure
10, pg. 10)
NOTICE
All low voltage interconnect wiring must
be at least 18 AWG.
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 11
Electrical Wiring (continued)
Units with or without heat
NOTICE
All low voltage interconnect wiring must
be at least 18 AWG.
Cooling-only
Cooling only units utilize two low volt in-
terconnecting wires between the indoor and
outdoor units.
Wires designated “Y” (yellow) and “C”
(brown) of the air handler should be con-
nected to the corresponding “Y” (yellow)
and “C” (brown) wires or terminals of the
condenser (Figure 11, Page 11).
Other wires or terminals such as “R” (red) or
“O” (orange) may not be needed and should
be protected by a wire nut from making
contact with the junction box or other metal
surfaces.
Heat pump connection
Heat Pump Connection: In addition to the
“Y” and“C” connectionsrequiredfor cooling,
heat pumps require a reversing valve control
wire “O” (orange) that is energized in the
cooling mode.
If the indoor unit has an electric heater, then
a ”W” (white) wire connection will also be
needed to energize the indoor electric heat.
If a wall thermostat is used.
Heat pumps models require an “R” connec-
tion between the indoor and outdoor unit to
provide power to the defrost control board in
the condenser (Figure 12, Page 11).
Unit-mounted controls —Figure 11
cooling only
Unit-mounted controls —Figure 12
heat pump connection, two-
stage heating
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 12 P/N 240008111, Rev. G [06/18/10]
Electrical Wiring (continued)
Wall thermostat controls
For remote wall mounted thermostat layout see -
(Figure 13, pg. 12)
NOTICE
All low voltage interconnect wiring must
be at least 18 AWG.
NOTICE
Unit mount control — If the control
is configured for unit mount control
DO NOT connect a wall thermostat to
the unit.
The 24V control transformer is located in the
air handler unit.isprovideslowvolt control
power to both the air handler and condenser.
Depending on the models selected, the inter-
connect control wiring may be eected.
NOTICE
For wall thermostat mode, the key pad
will have limited operation (see Se-
quence of Operation Wall-mounted
thermostat, page 29).
Choosing a remote wall-mounted
thermostat
See page 29 for wall thermostat selection
information.
Depending on the thermostat required or se-
lected, air handlers may utilize four to six low
voltinterconnectingwiresbetweenthe indoor
unit, thermostat and outdoor unit.
Some thermostats do not require the use of
the “C” (brown) connection. In this case,
ensure that any unused wires are insulated
with a wire nut to prevent them from making
contact with the junction box or other metal
surfaces.
Wall-mounted thermostatFigure 13
configuration —
cooling only
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 13
Electrical Wiring (continued)
Electric heat applications
(Figure 14, Page 13)
If the indoor unit has electric heat then a “W”
connection is required between the thermo-
stat and indoor unit.
Some thermostats do not require the use of
the “C” (brown) connection.
Heat pump applications
(Figure 15, Page 13)
Heatpumpoperationrequirestheconnection
ofthe“O”(orange)terminal from theoutdoor
unit to the thermostat.
e reversing valve is energized in the cool-
ing mode for EMI models S1HG heat pump
condensers.
NOTICE
Heat pumps only: Two-stage heating
requires the combination of a heat pump
condenser and an indoor unit that is
equipped with an electric strip heater.
e indoor electric heater will energize
as the second stage heat source (the tem-
perature is dependent on the thermostat
selected) and also during the defrost
mode for all heat pump models.
Finishing
Ensure that any unused wires are insulated
with a wire nut to prevent contact with the
junction box or other metal surfaces.
Once certain all electrical connections are
made replace control box cover.
Control box Replace screw
Wall-mounted thermostatFigure 14
configuration —
cooling + electric heat
Wall-mounted thermostatFigure 15
configuration —
cooling + heat pump
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 14 P/N 240008111, Rev. G [06/18/10]
Refrigerant Piping
CAUTION
Avoid piping on wet and rainy days.•
Use only clean, refrigeration-grade•
copper tubing.
Use tubing benders to guard against•
kinking.
Be certain no burrs remain on the•
ings.
Cap ends of lines until ready for con-•
nections. Be certain that plastic end
caps remain in place when inserting
through wall openings.
Insulate the suction line.•
Isolate tubing from transmiing vibra-•
tion to the building or unit and avoid
contact with sharp edges.
Wrap refrigeration valves with a wet•
rag “heat sink” to protect valves while
brazing. (See Figure 14, Page 15.)
DO NOT use a suction line size larger•
than the condenser service valve con-
nection. is can harm the compres-
sor. Install a reducer, when used, only
on the inside connection.
Preparing for piping
With the unit mounted and leveled per1.
instructions beginning on page 7.
Leave the le end cap o of the unit to2.
allow removal of the boom panel.
Remove the Phillips-heads screws on the3.
boomofthe unit and removethe boom
panel (Figure 16, Page 14).
See (Figure 17, Page 14) for locations of4.
the piping connections in the WLCG/
WLHG unit.
Removing bottom panelFigure 16
Piping connections at unitFigure 17
Suction line
(When a reducing bushing is required, install
only here, at the indoor suction-line connec-
tion.)
Liquid line
Condensate drain
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 15
Refrigerant Piping (continued)
Clean ends of tubingFigure 18
Place wet rag “heat shield” overFigure 19
valves plus a sheet metal shield
to protect paint
Wet rag heat sink Shield
NOTICE
e WLCG/WLHG is equipped with
a Flo Rater piston expansion device or
TXV. Connections are sweat type.
Line sizing
Size lines per (Table 7, Page 43).1.
e suction line size must match the con-2.
denser service valve connection.
When matching the WLHG24 witha.
an 18,000-Btuh condenser, you must
use a 5/8-inch suction line, with a
reducer installed as shown in (Fig-
ure 17, Page 14).
Refrigerant piping
Clean the ends of tubing and insert into1.
ings (Figure 18 page 15).
Before brazing (Figure 19 page 15):2.
Protect valves bywrapping with a weta.
rag “heat sink” before brazing.
Use a shield to protect the paint asb.
shown. (e shield can be made from
scrap metal.)
Braze tubing into ings, using a continu-3.
ous nitrogen purge.
e suction line must be insulated the4.
entire length with closed cell, foam tube
insulation.
Do not insulate the liquid line.5.
Connect the outdoor unit according to6.
the instructions supplied with unit.
All horizontal piping runs must be level7.
and without dips to trap the oil.
CAUTION
Pressure test all eld installed piping with nitrogen. Using a suitable vacuum pump,
evacuate the tubing and indoor unit to 500 microns or less, with service valves remaining
front seated (closed).
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 16 P/N 240008111, Rev. G [06/18/10]
Refrigerant Piping (continued)
Refrigerant processing
Aach manifold set (Figure 20 page 16).1.
Evacuate line to 500 microns or less to2.
ensure all moisture has been removed and
there are no leaks.
Once certain of a good evacuation and3.
leak free joints, back-seat the valves
(counter-clockwise) to open and allow
factory charge to ll lines and indoor unit
(Figure 21, Page 16).
NOTICE
Refer to refrigerant charge table for speci-
ed charge.
Use only R410A refrigerant. Add and4.
remove only liquid, never vapor.
Charge to proper weight, charge based on5.
feet of interconnect (Figure 22, Page 16).
See tables on page 17.
CAUTION
Refer to the charts in the condenser
manual to “fine tune” the refrigerant
charge.
WLCG30 and WLCG36 utilize a TXV
(thermo expansion valve), which should
be set at 15°F.
CAUTION
Charging should be done with a dial-a-
charge or weighed in with a scale.
WARNING
It is illegal to discharge refrigerant into
the atmosphere. Use proper reclaiming
methods & equipment when installing
or servicing this unit.
Manifold set connections at unitFigure 20
S1CG
Shown
Manifold set up for evacuationFigure 21
A
BC
S1CG
Shown
ManifoldA Vacuum pumpB
Micron gageC
Charging the unit
Figure 22
S2CGS1CG
Refrigerant
S1CG
Shown
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 17
S1CG/S1HG, S2CG/S2HG and top discharge R410A refrigerant charge table
Table 2
Condenser Wall Unit
pairing
Line charge
per foot
Factory
charge Top discharge, Multi-zone
S1CG9 WLHG09 .25 oz./ft
(23 g/m)
39.5 oz.
(1119 g)
Circuit capacity Wall Unit
Paring
Line charge
per foot
Factory
charge
S1CG2 WLHG12 .25 oz./ft
(23 g/m)
33.75 oz.
(956 g)
S1CG8 WLHG24 .64 oz./ft
(59 g/m)
65.25 oz.
(1764 g) 9,000 Btuh WLHG09 .25 oz./ft
(23 g/m)
46.5 oz.
(1318 g)
S1CG4 WLHG24 .64 oz./ft
(59 g/m)
63.0 oz.
(1786 g) 12,000 Btuh WLHG12 .25 oz./ft
(23 g/m)
45.25 oz.
(1282 g)
S1CG3 WLCG30 .64 oz./ft
(59 g/m)
97.5 oz.
(2764 g) 18,000 Btuh WLHG24 .64 oz./ft
(59 g/m)
96.75 oz.
(2742 g)
S1CG6 WLCG36 .64 oz./ft
(59 g/m)
80.0 oz.
(2267 g) 24,000 Btuh WLHG24 .64 oz./ft
(59 g/m)
78.5 oz.
(2225 g)
S1HG9
WLHG09
.25 oz./ft
(23 g/m)
51.52 oz.
(1460 g) Side Discharge Multi-zone
S1HG2
WLHG12
.25 oz./ft
(23 g/m)
45.75 oz.
(1296 g) Circuit capacity Wall Unit
Paring
Line charge
per foot
Factory
charge
S1HG8
WLHG24
.64 oz./ft
(59 g/m)
63.0 oz.
(1786 g) 9,000 WLHG09 .25 oz./ft
(23 g/m)
44 oz.
(1247 g)
S1HG4
WLHG24
.64 oz./ft
(59 g/m)
60.75 oz.
(1722 g) 12,000 WLHG12 .25 oz./ft
(23 g/m)
39 oz.
(1105 g)
Refrigerant Processing
NOTICE – to find charge adjustment
To nd the charge adjustment and system charge for any air handler and tubing1.
length:
Line Adjustment = (Line Charge/FT) x Line Length
System Total = Factory Charge + Line Adjustment
Round to the nearest ounce and allow for gauges and hoses.2.
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 18 P/N 240008111, Rev. G [06/18/10]
Reassemble the WLCG/WLHG Cabinet
CAUTION
Verify the system is leak-free and all pip-
ing has been properly installed before
reassembling the cabinet.
Reassemble the cabinet
Figure 23, Page 18
Replace the boom panel.1.
Fasten the right end cap rst using the2.
Phillips head screw.
Replace and tighten the remaining screws3.
across the boom panel.
Figure 24, Page 18
Replace the le end cap.4.
Once end cap is properly seated, tighten5.
the screw on the right.
Tighten the boom end cap screw.6.
Figure 25, Page 18
Replace the grille.7.
Tighten the top screw on the left end8.
cap.
Replace bottom panelFigure 23
1 2
3
Replace left end capFigure 24
4 5
6
Replace grilleFigure 25
7
8
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008111, Rev. G [06/18/10] 19
Initial Start-Up
Unit-mounted controller
operation
Select Remote ermostat OFF in the con-
guration. For operating details, see informa-
tion beginning on page 25.
eEMISeriescontrollercanoperate the unit
in cooling, heating (when equipped) or auto
changeover mode. Setpoint temperature can
be either manually set or allowed to follow
pre-programmed (7-day) seings. (See Fig-
ure 29, Page 23) for more information.
e controller provides diagnostics with an-
nunciation and includes sensors to prevent
short cycling and other benets as explained
on page 32.
Adjust and congure the unit using the key-
pad (see Figure 26, Page 20).
e unit can be operated with either the key-
pad or the optional infrared remote control
(Figure 27, Page 21).
Before operating the unit, use the informa-
tion in (Figure 28, Page 22) and (Figure 29,
Page 23) to congure and set up the control-
ler.
Wall thermostat operation
Select Remote ermostat ON in the congu-
ration. (Figure 28, pg. 22)
See page 29 for setup and operation when
using a wall thermostat.
e unit must be congured for wall ther-
mostat operation as described in (Figure 28,
Page 22.
NOTICE
Operation of the unit depends on the
room temperature. It may be necessary
to warm the room before testing the
unit’s cooling abilities.
Before starting the unit
NOTICE
Check the outdoor unit’s start-up in-
structions for specic requirements and
procedures.
Remove any tools or other obstructions.1.
Be sure the lter is in place.2.
Verify that the unit is level and plumb.3.
Separate any refrigerant lines that contact4.
each other.
Replace the cabinet end cap and the grille5.
front of the unit.
Test each power and circuit connection6.
before powering up the system.
Congure the controller per Figure 28,7.
Page 22.
Make set-up adjustments as needed us-8.
ing Figure 29, Page 23. Use Test mode if
desired to reduce start-up time.
Use the unit-mounted electronic con-9.
troller to start the system. (Set remote
thermostat to OFF in the controller con-
guration, Figure 28, Page 22.)
Connect wall thermostat wiring (if used)10.
after initial start-up. (This requires re-
setting the remote thermostat option
to the “ON” configuration, Figure 28,
Page 22.)
Cycle the unit several times in each mode11.
to ensure the system and components are
operating correctly.
WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts 20 P/N 240008111, Rev. G [06/18/10]
WLCG/WLHG Controller Overview
Ductless Series unit-mounted controller — chassis-mounted keypad/displayFigure 26
ON/OFF Press to turn on or o.
MODE Press to change operating mode toggles between Cool, Heat, Auto changeover,
Dry or Fan modes.
FAN Press briey to toggle fan speed between High, Low and Auto.
Press and hold for three seconds to set louver position (see Figure 29, Page 23).
PROG
During operation press to enter/exit pre-programmed mode (see Figure 29,
Page 23).
During conguration press to move backwards in menus.
TIME With the unit ON, press and hold 3 seconds to enter time set mode sets current
time of day.
TIMER With the unit ON, press to enter or exit sleep timer mode. In sleep timer mode, the
unit will operate for 30 minutes, then turn OFF. e display will show TIMER.
During operation use to increase or decrease the setpoint temperature.
During conguration, setup, etc. use to increase or decrease the seing.
Holding the buon will cause rapid change.
MODE + FAN FILTER CHECK reset Press both buons and hold for 3 seconds to clear FILTER
CHECK (see Figure 28, Page 22).
FAN + PROG QUICK COPY Press both buons and hold for 3 seconds during 7-day program-
ming to copy the current day’s seings to all days (see Figure 29, Page 23).
PROG + TIME 7-DAY PROGMMING Press both buons and hold for 3 seconds to enter
7-day programming mode (see Figure 29, Page 23).
MODE + PROG CONFIGUTION MODE Press both buons and hold for 10 seconds to enter
conguration mode (see Figure 28, Page 22).
ON/OFF +
PROG + TIME
TEST MODE Press all three buons and hold for 3 seconds to enter test mode
(see Figure 29, Page 23).
This manual suits for next models
2
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