ECR International WLC Series General instructions

Enviromaster International LLC
5780 Success Dr.
Rome, NY 13440
www.enviromaster.com

INSTALLATION,OPERATIONANDMAINTENANCEMANUAL
P/N240006021,Rev.1.2[09/06]
Thismanualisintendedasanaidtoaqualifiedservicepersonnelforproperinstallation,
operation,andmaintenanceofEMIAmericaSerieshighefficiencyevaporators. Carefully
read these instructions before attempting installation or operation. Failure to follow
these instructions may result in improper installation, operation, service, or maintenance,
possibly resulting in fire, electrical shock, property damage, personal injury, or death.
(1) Retain this manual and warranty for future
reference.
(2) Before leaving the premises, review this
manual to be sure the unit has been
installed correctly and run the unit for
one complete cycle to make sure it
functions properly.
To obtain technical service or warranty
assistance during or after the installation
of this unit, check our website @ www.
enviromaster.com or call your installing
contractor or distributor. Our technical
service department may be contacted at
1-800-228-9364.
When calling for assistance, please have
the following information ready:
• Model Number
• Serial Number
• Date of installation
DANGER
'_' Read all instructions before using the
EMI AmericaSeries high efficiency
evaporator. Install or locate this
unit only in accordance with these
instructions. Use this unit only for
its intended use as described in
this manual.
Check the rating plate on the EMI
AmericaSeries evaporator before
installation to make certain the
voltage shown is the same as the
electric supply to the unit.
The EMI AmericaSeries evaporator
must be connected only to a properly
grounded electrical supply. Do not
fail to properly ground this unit.
Turn off the electrical supply before
servicing the EMI AmericaSeries
evaporator.
Do not use the EMI AmericaSeries
evaporator if it has damaged wiring,
is not working properly, or has been
damaged or dropped.
[Save These Instructions]

The AmericaSeries WLC/WLH is avail-
able as a (Dx) direct expansion straight cool
and heat pump. It offers a contemporary
design in a ductless type evaporator and
combines attractive appearance with high
efficiency conditioning for small to medium
size commercial or residential spaces. The
WLC/WLH is equipped with unit mounted
infrared compatible controls which also sup-
ports 24V remote wall thermostat operation.
Optional hand held remote is available.
Heat Pump models provide up to
23,000 Btuh of cooling and 20,600 Btuh of
heating. Electric heat options are available
for up to 5KW of supplemental heat.
This American-made evaporator offers
ease of installation, operation, and service.
It can be matched with EMl's $1C/81H
09-24 and S1C 30-36 Btuh Single-Zone
Condensing Units, the $2C side discharge
Dual-Zone Condensing Unit, or the T2C,
T3C, and T4C top discharge Multi-Zone
Condensing Units.
All EMI Air Handlers are backed by
Enviromaster International LLC and are
tested and rated in accordance with ARI
standards 210/240 and UL 1995.
ote: If the control is configured for_
nit mount control do NOT connect I
wall thermostat to the unit. .J
•Large LCD Backlit Display
•Single unit mounted control pack-
age, configurable to either unit mount
or remote wall thermostat operation,
reducing model number or 8KU's
required.
•Universal control can be used in
cooling only, cooling with electric heat,
heat pump, or heat pump with second
stage electric heat applications.
•Operational range set point tem-
perature adjustable between 55°F and
90°F in one-degree increments.
•Infra red compatible control allows
use of optional IR hand held controller.
!uOte: Unit mounted controls are_
Ily functional without the handheld|
emote. J
•Operation modes include Heat, Cool,
Dry, Fan and Auto Change-over.
•Fan Operation-AutolOn. High or Low
speed fan
•Fan Purge - Fan remains on for
60 seconds after Heat/Cool call is
dropped for improved efficiency (Auto
mode only)
•Room air sampling: Selectable time
intervals ensure the fan will cycle
on periodically, in Auto Fan Mode
to help eliminate room temperature
stratification.
•Selectable Fahrenheit (°F) or Cesius
(°C) temperature scale.
•Dry mode - Operates cooling and
electric heat simultaneously to remove
humidity. Optional electric heat must
be selected.
•Anti-Short Cycle Compressor Pro-
tection.
•Minimum on time for heating and
cooling Helps eliminate room temper-
ature drop and system short cycling.
•Freeze Protection - Prevents evapo-
rator freeze up.
•Test operation - Allows ease of test-
ing after installation (all timers are
eliminated).
•Non-volatile back-up memory will
maintain control settings for an indefinite
period during a power outage. When
power is restored the equipment will
resume operation after a three-minute
compressor time delay.
• 7-day programmable with copy feature.
•Filter change indicator: A timer fea-
ture indicates when the filter should be
changed according to the selected time.
•Motorized supply Iouverwith optional
sweep or six stationary settings.

•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 mi-
croprocessor 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 flow
protection
A_ Cabinet Features:
• Durable ABS plastic cabinet with a
galvanized steel sub-chassis.
• Easily accessible, washable, reusable,
nylon mesh filter.
• Horizontal discharge louver, construct-
ed of high temperature ABS plastic,
that can be set to oscillate, or can be
parked in six pre-set positions.
• Manually adjustable vertical discharge fins.
• Easy access to pipe chase area from
cabinet bottom allows piping connec-
tions 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
galvanized steel (Gg0U), with anti-cor-
rosion coating.
• Modular snap-in, 7-day programmable
control with large backlit LCD display,
a "Change filter" display feature and
selectable Fahrenheit (F°), or Celsius
(C °) temperature scale.
NOTE: Unit mounted controls are fully fun_-_
OTE: If the control is configured for unit_
ount control do NOT connect a wall ther- )
£stattotheun!t_ _/
• Condensate pump (field installed only)
• 24V remote wall thermostat
• Electric heat with automatic reset high
temperature cutout and redundant
high temperature fuse link (when heat
option is selected)
• Hand held infrared controller.
•Low voltage wiring (18 awg required)
• High voltage power supply wiring
• Mounting screws and fasteners
• Condensate piping
• Refrigerant piping (if not supplied)
•Refrigerant (for interconnect charge)
O" ® I " _ •
• ._ Determine the best location for mount-
ing the unit for room air circulation.
_ Locate outdoor and indoor units as
close together as possible.
,t_" Determine how power wire (high and
low voltage) condensate drainage,
and refrigerant piping may be run to
and from the unit.
,_ WLC/WLH - Ensure that intercon-
nect tubing is within the maximum
allowable length of 100' including a
maximum 35' lift.
,_'¢ To ensure serviceability and proper
air distribution, the unit should be
positioned 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. The cabinet left and right end caps
must be accessible for removal without
obstruction. (See below)
CEILING
4" Minimum
Minimum
]
d
J

The WLC/WLH must be mounted
plumb and level to a vertical surface to
prevent unit vibration and/or unwanted
noise. It is recommended that the unit
be mounted directly to a smooth surface
such as Sheetrock ® wallboard or similar
material. If mounting to a masonry block
wall, there should be a smooth barrier
between the unit and the masonry block
surface to absorb any potential vibration
and prevent the formation of condensation
on the wall.
"NOTE: If excessive noise or vibration is ex-_
perienced from a unit mounted toa masonry I
block wall, check to ensure the unit is plumb I
and level. If noise or vibration persists, con- I
_act the Wholesale Distributor. ,._
1. After determining the best location for 5. Secure the bracket to the wall with the
the unit, use the cardboard template appropriate screws (for wood) or an-
provided in the packaging, chors (for masonry). Ensure the bracket
is mounted in a manner that will support
the weight of the unit.
NoOte: The wall hanging bracket slot is NOT_
cared in the center of the unit. J
2. Mark where the piping, electrical wiring
and condensate drain should penetrate
the wall.
3. Determine the appropriate hole size and
cut through the wall. slot
4. Use the supplied wall bracket. For
shipping purposes, the wall bracket is
fastened to the back of the unit. 6. To mount the unit to the bracket, align the mounting slot on the back of the
unit over the bracket and make certain
it fits properly.
(_NOTE: Piping may be roughed in before'_
wallboard or panels are placed in new I
construction. PVC pipe (3 or 4 LD.) I
_, may be used as a pipe chase. J
_NOTE: Panels should remain on the unit_
at all times, while powered and in opera-
tion. Service should be performed by a
QUALIFIED service agency. An annual
system check by aqualified service tech-
_nician is recommended.
lJ
these screws

F
All wiring should be in accordance with the
National Electric Code (NEC) and the local
building codes.
1. Make sure power is off.
2. Check the unit rating plate for circuit am-
pacity and breaker or time delay fuse size.
Use only HACR type breakers. Select
the proper wire for the ampacity rating.
3. Each unit must have a separate branch
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.
4. Inspect the existing wiring for any defects
such as cut or frayed wires. Replace if
any such wiring if found.
fNOTE: 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 left
k_. end cap of the unit. .J
2. Lift and remove the front grill to expose
the third screw.
unit
1. The left end cap of the unit needs to be
removed to access wiring diagram and
electrical wiring. This entails removal of
three screws.
3. Once the screws are removed,
slide the left end cap
off to expose control
box and locate the
wiring diagram on
the inside of the
end cap.
Control box Remove screw

4. To access High and Low wiring remove
the screw on the front of the control box.
5. Refer to the wiring diagram to connect
the power wire to Black L1 and the other
wire to Red or White (115V) L2 at the
power connector location.
6. Connect the ground wire to the ground
lug or lead at the same location in the
control box.
The 24V control transformer is located
in the evaporator. This provides low Volt
control power to both the evaporator and
condenser. Depending on the models se-
lected, the low Volt interconnect control
wiring may be effected.
Note: All low Volt interconnect *_
rWiHng must be at least 18 awg. J
L2
Voltage
Connections
Cooling only units utilize two low Volt
interconnecting 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. (See Figure 1A)
* 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: in addition to the
"Y" and "C" connections required for cool-
ing, heat pumps require a reversing valve
control wire "0" (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 remote 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. (See Figure 1B)

Unit mount control oonfiguration
Straight Cool Appitcation
__*®1................I'__ _°_i
_ J
Low Volt interconnect diagram intercon-
nect diagram FiL_ure IA and Figure IB
for unit mounted controls.
Unit mount control configuration
Heat Pump App#eadon
_le_et¢ heat @p#@t_
_., .J
When connecting to a defrosting heat
pump, such as EMI model S1H, indoor
units with electric heat utilize five intercon-
necting low Voltwires between the indoor
and outdoor units.
The 24V control transformer is
located in the air handler unit. This
provides low Volt control power to
both the air handler and condenser.
Depending on the models selected,
the interconnect control wiring may
be effected.
_NOTE: All low Volt interconnect_
wiring must be at least 18 awg. J
fNoTE: For remote thermostat mode_
the key pad will have limited opera- I
tion -Sequence of Operation -Wall I
_.Mounted Thermostat, page 21. .t)
Choosing a Remote Wall Mounted
Thermostat: See "Wall Thermostat
Control" section page 21.
Remote wall mounted thermostat configuration
Straifht Cool Appfeattoo
...... q........F{;o=°-
Se_ thermostats de net t_e
_C* termlnat J

Low Volt interconnect diagram interconnect diagram Fiqures 2A. 2B & 2C for remote wall thermostat control.
Depending on the thermostat re-
quired or selected, air handlers may
utilize four to six low Volt intercon-
necting wires between the indoor
unit, thermostat and outdoor unit.
Some thermostats do not require
the use of the "C" (brown) connec-
tion. In this case, ensure that any
unused wires are insulated with a
wire nut to prevent them from mak-
ing contact with the junction box or
other metal surfaces.
If the indoor unit has electric heat
then a "W" connection is required be-
tween the thermostat and indoor unit.
NOTE: If the control is con- _
figured for unit mount con- I
trot do NOT connect awa!l I
thermostat to the unit. J
Refer to low Volt interconnect
diagram interconnect diagram
Fiures 2A 2B & 2C for remote
wall thermostat controls.
• Some thermostats do not require
the use of the "C" (brown) con-
nection.
• Heat pump operation requires
the connection of the "0" (or-
ange) terminal from the outdoor
unit to the thermostat.
The reversing valve is energized
in the cooling mode for EMI models
S1H heat pump condensers.
Ensure that any unused wires are
insulated with a wire nut to prevent
contact with the junction box or other
metal surfaces.
Once certin all electrical con=
netions are made replace control
box cover,
Replace screw
Remote wait meunt_ thermostat configuration
Cooling/Electric Heat Application
I
_C__rrI_nat
Remote waft meonted thermostat oonfig#ratien
Heat Pomp Appfioa#en
_<'_°°=®-i ........i---__;:__®--i----*---{-"® <"_=
_*_=__ ...................... @ ............... @
........ J I
a _" tertctlia_
fSINGLE-ZONE 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.
The 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 models S1H.

- - _® • _ Be The WLC/WLH is equipped with a
Fie-Rater/Piston Expansion device. Con-
, Avoid piping on a rainy day. nections are sweat type.
• Use refrigerant grade copper tubing.
• Use a tubing bender and avoid unnec-
essary bending.
• Cap ends of lines until ready for final
connections. J
Once the unit is mounted and level
the WLC/WLH piping connections can be
made by removing the left end cap and
bottom panel:
Note: The left end cap must_
be removed prior to remov- I
ing the bottom. Follow the I
instructions on page 6 for I
removing the end cap. .]j,
The suction line (large) must be insulated
the entire length with closed cell, foam tube
insulation. Do not insulate the liquid line
(small). Connect the outdoor unit according
to the instructions supplied with unit.
All horizontal piping runs must be level and
without dips to trap the oil.
2. Exposed piping and condensate drain
connections. (See table on page 36 for
connection size per unit capacity.)
1. Remove the Philips-
head screws on bot-
tom of unit and lift
bottom panel off. Liquid line Suction line -_
Condensate drain
When matching a the WLH24 with an 18,000
Btuh condenser circuit, the interconnecting
suction line needs to be 5/8" O.D. to match
the condenser service valve connection.
Therefore the 3/4" O.D. suction connection
of the WLH24 unit needs to be reduced to
5/8" at the WLH24 unit connection.

Anychangeinthediameterofthetubing
must be made at the indoor connection.
Line-set diameter is determined by the
condenser service valve size.
Use ofa larqer diameter liquid or suc-
tion line can harm the compressor!
Reducing bushing goes here for "_
18,000 Btuh system match
Important: Replace the existing piston (before instafling the unit) with the piston
supplied in Kit Bag when any:
•WLHA24 evaporator is matched with a S1CAS_000 or $1 HA8000 condenser which has
an 18,000 Btuh compressor ("8"in the capacity decoding field). The piston will need
relacement only on the 18,000 Btuh zone.*
Your EMI evaporator unit contains the appropriate piston for your model. Refer to this
document to determine if a change is required based on your condenser rating. If your
match is not fisted below no piston change is required. (See chart below)
*"8" in the capacity decoding field = 18,000 Btuh

WARNING! 4.Brazetubingintofittings.
5.Attachmanifoldset.
ManifoldVacuumPumpMicron Gage
Finish a!l _ eonnectinq before
roceedin to char in the s stem.
Follow the instructions in the outdoor
unit for line evacuation, opening service
valves, and final charge adjustments. Op-
eration charts and charge tables can be
found in the EMi Condenser IOMs.
1. Clean the ends of tubing and insert into
fittings.
6. Evacuate line to 500 microns or less to
ensure all moisture has been removed
and there are no leaks.
2. Protect the valves by wrapping with a
wet rag "heat sink" before brazing.
Heat sink Shield
7. Once certain of a good evacuation and
leak free joints, back-seat the valves
(counter-clockwise) to open and allow fac-
tory charge to fill lines and indoor unit.
(_Refer to Charts in condenser manual t_
3. We recommend the use of a shield (can L"fine tune" the refrigerant charge.
be made from some scrap metal) to --"
protect the paint.

8. Chargeto properweight,charge
basedon yourfeetof interconnect
(seebelow).
IMPORTANT NOTES:
I. To find the charge adjustment and system charge for any evaporator and tubing length:
Line Adjustment =(Line Chg/Ft) x Line Length
System Total =Factory Charge + Line Adjustment
2. Round to the nearest ounce and allow for gauges and hoses.
3. Use R22 refrigerant.
09 25 oz. 28 oz
12 25 oz. 30 oz
18 56 oz. 48 oz
24 56 oz. 60 oz
S1CA9 WLHA09 25 oz. 37 oz.
S1CA2 WLHA12 25 oz. 40 oz.
S1CA8 WLHA24 56 oz. 51 oz.
S1CA4 WLHA24 56 oz. 65 oz.
S1CA3 WLCA30 56 oz. 72 oz.
S1CA6 WLCA36 56 oz. 90 oz.
S1HA9 WLHA09 25 oz 41 oz.
$1 HA2 WLHA12 25 oz 44 oz.
$1 HA8 WLHA24 56 oz 53 oz.
$1 HA4 WLHA24 56 oz 67 oz.
S2CA99 WLHA09 .25 oz. 28 oz./28 oz.
$2CA22 WLHA12 .25 oz. 33 oz./33 oz.
S2CA92 WLHA09+WLHA12 .25 oz. 28 oz./33 oz.

When satisfied that the system is leak free reinstall the bottom and left end cap in the precise
order shown below:
1. Replace the bottom panal.
5. Once end cap is
properly seated
tighten the screw
as shown above.
6. Thighten bottom
end cap screw.
3. Next replace and
tighten the re-
maining screws
across the bot-
tom panel.
4. Replace left
left end cap.
7. Replace the grille,
ensure it's seated
properly on the
unit.
8. Tighten the top
scew on the left
end cap.

"MODE"button=selectmodeofoperation,Cool,
Heat,Autochangeover(ACO),DryorFanmode.
"UP"arrowbutton=increaseset
pointtemp.,also=incrementset-
tingsinConfig.,TimeSet+Prog.
modes.
"ON/OFF"buttonpressonce=
unitonoroff.
"DOWN"arrowbutton=
setpointtemp.also=decrement
settingsinConfig.,TimeSet+Prog.
modes.
"TIMER"button=enterorexit
SleepTimermode.
"TIME"button=enterorexitSet
Timemode.
"PROG"button= enterorexit
Pre-prog.Runmode.
"FAN"button=selectfanspeed,
High,LoworAuto.
"FAN/LOUVER"
buttonpress&holdfor3seconds="LOU"onLCD,thenUP&DOWNARROW=positions
"FILTERCHECK" Is flashing: press "MODE"
+ "FAN" buttons simultaneously for 3 sec. =
clear warning.
"QUICK COPY" = 7-Day Prog. mode, press
"FAN" + "PROG" buttons simultaneously for 3
sec. to copy selected day to rest of week.
TEST MODE: In Oft mode, press "ON/OFF' +
"PROG *'+ "TIME" buttons simultaneously for 3
sec. = Test mode. Press "ON/OFF" + "PROG"
+ "TIME *' buttons simultaneously again = exit
Test mode.
7-DAY PROGRAM: In Off or Run mode, press
"PROG" + "TIME" buttons simultaneously for
3 sec. = 7-Day Prog. mode. Press "PROG" +
"TIME" buttons again or if left idle for 20 sec. =
exit 7-Day prog. mode.
CONFIGURATION MODE: in Off mode, press
"MODE" + "PROG" buttons simultaneously
for 10 sec. = Config. mode. Press "MODE" +
"PROG" buttons again or if left idle for 20 sec. =
exit Config. mode.
Pressing the "ON/OFF" The "MODE" button allows
button once will switch the unit either on the selection of the mode of operation,
or off. Cool, Heat, Auto changeover (ACO), Dry
or Fan mode.

The"FAN"buttonwillselect
thefanspeed,High,LoworAuto.High
andlowareconstantfanspeedsettings
andcanbeselectedinallmodesexcept
Drymode.InDrymode,thefanwillop-
erateconstantlyatlowspeed.Autofan
modeisnotavailableinFan(only),Dry
andRemotewallthermostatmodes.
vermode.Toenterthelouvermodepress
andholdtheFan/Louverbuttonforthree
seconds.Whilein louversetmodethe
word"Lou"willdisplayontheLCD.
The"PROG"buttonisused
to enterorexitthePre-programRun
mode.ThePre-programRunmodecan
beenteredwhilethecontrolisin"Cool",
"Heat"or"Auto"modes.Pre-programRun
modecannotbeenteredwhileinDry,
FanorOffmodes.Whilethecontrolisin
Pre-program Run mode the word "PRO-
GRAM" will be displayed on the LCD.
The "TIME" button is used
to enter or exit the Set Time mode. The Set
Time mode can be entered while the con-
trol is in any mode including Off mode. To
enter the Set Time mode, press and hold
the "TIME" button in for three seconds. To
exit press the "TIME" button momentarily.
The "TIMER" button is used
to enter or exit the Sleep Timer mode.
When the "FILTER CHECK" indicator
warning is flashing on the LCD, pressing the
"MODE" and "FAN" buttons simultaneously
for three seconds will clear the warning.
While in 7-day programming mode, press-
ing the "FAN" and "PROG" buttons simul-
taneously for three seconds will copy the
selected day to the rest of the week.
When the unit is either in the Off or Run
mode, pressing the "PROG" and "TIME"
buttons simultaneously for three seconds
will enter the 7-Day Programming mode.
Pressing the "PROG" and "TIME" buttons
again or if left idle for 20 seconds, will exit
the 7-Day program mode.
The "UP" arrow button is used to increase
the set point temperature. Also, the "UP"
arrow button is used to increment settings
in the Configuration, Time Set, Program
and Louver Set modes.
When the unit is in the Off mode, pressing
the "MODE" and "PROG" buttons simulta-
neously for 10 seconds will enter the Con-
figuration mode. Pressing the "MODE" and
"PROG" buttons again or if left idle for 20
seconds, will exit the Configuration mode.
The "DOWN" arrow button is used to de-
crease the set point temperature. Also,
the "DOWN" arrow button is used to dec-
rement settings in the Configuration, Time
Set, Program and Louver Set modes.
The Fan/Louver button is
used to enter the louver mode. The louver
mode allows selection of six different fixed
louver positions or auto (oscillation) Iou-
When the unit is in the Off mode, pressing
the "ON/OFF", "PROG" and "TIME" but-
tons simultaneously for three seconds will
enter Test mode. Pressing the "ON/OFF",
"PROG" and "TIME" buttons simultaneously
again will exit Test mode
fCAUTION:
Do not cycle the unit on and_'_
off repeatedly while in Test mode as this I
will cause damage to the compressor. Do I
not leave the unit in Test mode. ]

For unit mounted key pad operation
the control must be configured through
the Configuration mode. Be sure to select
Remote - OFF in the configuration menu.
(See Configuration mode)
ote: When power is first applied to the_
ontrol or after a power outage there is I
three minute delay before the corn- I
ressor or electric heat will energize. I
is is to protect the unit from short cy- I
ng due to loss of power. ,j
Pressing the "ON/OFF" button once
will switch the unit either on or off. In the
Off mode, the LCD will display the time of
day and day of the week. In the On mode
the LCD display will also display the room
temperature and the mode of operation
Cool, Heat, Auto (Auto changeover), Dry
or Fan mode. While in the On mode, the
set point temperature will display momen-
tarily with the push of any button except
the ON/OFF button.
The FAN button will allow the selection of
the desired fan setting in all modes except
Dry mode. In Dry mode, the fan will oper-
ate constantly at low speed. The LCD will
indicate fan speed selection.
High and Low are constant fan settings.
The fan will operate continuous regardless
of set point or room temperatures. Auto
mode is for cycling fan operation.
Auto Fan mode can only be selected if
the unit is in Heat, Cool or Auto Change-
over modes. In Auto Fan mode the fan
will cycle with the call for Heat or Cool.
Fan speed will be determined by the mi-
croprocessor and speed adjustment will
be made according to room and setpoint
temperatures. The fan will switch to High
speed when room temperature deviates by
more than two degrees from setpoint. The
fan will switch to Low speed if the devia-
tion is one degree or less. When the room
temperature reaches setpoint temperature
the heat/cool call will then be dropped. The
fan will stay on for an additional 60 sec. to
purge unit of any residual energy.
If the Room Air Sampling feature has
been enabled in the Configuration mode
(see Configuration mode), after the fan
has been off for the selected time, it will
then cycle on for 60 seconds. The unit will
circulate room air to remove any temper-
ature stratification by the unit so the mi-
croprocessor can determine an accurate
room temperature. After the 60 second
room air sample time has elapsed, and
if the setpoint temperature remains satis-
fied, the fan will cycle off.
When the unit is in Dry mode the fan
speed will remain constant at Low speed.
While the unit is in Fan mode, Auto is by-
passed and only High or Low are available.
The "MODE" button allows the se-
lection of the mode of operation, Cool,
Heat, Auto changeover (ACO). Dry or
Fan mode. In Fan mode either "HIGH" or
"LOW" will be displayed on the LCD.
The indoor unit utilizes a two-speed
motor with three operational fan modes.
When the control is in the Off mode the
louver will remain in the closed position.
When the unit is turned on via the ON/OFF
button the louver will open and operate ac-
cording to the setting selected in the Lou-
ver Configuration mode.
To enter the Louver Configuration
mode, press and hold the Fan/Louver
button in for three seconds. This will enter
the Louver Configuration mode and "Lou"
will display on the LCD. Pressing the Up

orDownarrowbuttonswillallowselection
ofsixdifferentfixedlouverpositionsor
auto(oscillation)mode.Thesequenceis
01,02,03,04,05,06andAuto.Oncethe
desiredsettingisselected,presstheFan/
Louverbuttonmomentarilyorletidlefor
10secondstoexitthelouversetmode.
WhilethecontrolisintheOnmode,
thelouverwillremainin theselected
louverposition.IfAutolouveroperation
isselected,thelouverwilloscillateonly
whenthefanisrunning.Whenthecontrol
isturnedoffviatheON/OFFbuttonthe
louverwillreturntotheclosedposition.
Forcoolingoperationfirstturntheunit
onviatheON/OFFbutton.SelectCool
modeviatheMODEbutton.Theroom
temperatureandsetpointtemperature
willbedisplayed.Thesetpointtempera-
turecanbechangedwitheachsucces-
sivepressoftheUporDownarrowbut-
tonsorbyholdingthebuttonin.
Placethesetpointtemperaturebelow
theroomtemperature.Thecompressor
willstartandcoolingwillcontinuefora
minimumoftwominutesandaslongas
thesetpointremainsbelowroomtemper-
ature.Oncetheroomtemperatureissat-
isfiedforatleast60secondsandthetwo-
minuteminimumruntimehaselapsed
thecompressorwillcycleoff.Thefanwill
operateasdescribedin"FanOperation".
OTE:Once the compressor is_'_
witched off, or after a power outage |
here is a three-minute delay before |
he compressor will re-start. J
J
_,_Optional Electric Heat Operation
(Non Heat pump condenser units only):
For operation with electric heat the
control must first be configured properly
(Heat source - "ON", Heat pump -"OFF").
See: Configuration Interface mode.
For electric heat operation, first turn the
unit on via the ON/OFF button. Then se-
lect Heat mode via the MODE button. The
room temperature and setpoint tempera-
ture will be displayed. Press either the
Up or Down arrow buttons to change the
setpoint temperature. The setpoint tem-
perature will change by one degree with
each successive press of the Up or Down
arrow buttons. Holding the button in will
change the temperature rapidly.
Place the setpoint temperature above
room temperature. The electric heat will
energize and heating will continue as
long as the setpoint remains above room
temperature. When the room temperature
has been satisfied for at least 60 seconds
and the two minute minimum on time has
expired, the electric heat will switch off.
The fan will operate as described in "Fan
Operation".
_'_ Optional Heat Pump With Electric
Heat (2-stage heating):
For heat pump operation with electric
heat the control must first be configured
properly (Heat source - "ON", Heat pump -
"ON"). See: Configuration Interface mode.
For heat pump operation with backup
electric heat, first turn the unit on via the
ON/OFF button. Then select Heat mode
via the Mode button.
The room temperature and setpoint
temperature will be displayed. Press either
the Up or Down arrow buttons to change
the setpoint temperature. The setpoint
temperature will change by one degree
with each successive press of the Up or
Down arrow buttons. Holding the button in
will change the temperature rapidly.
Place the setpoint temperature above
the room temperature by one degree. The
compressor will start and heating will con-
tinue for a minimum of two minutes and as
long as the setpoint remains above room
temperature. When the room temperature
has been satisfied for at least 60 seconds
and the minimum on time has elapsed,
the compressor will switch off. The fan will
operate as described in "Fan Operation".
Next, place the setpoint temperature
above the room temperature by at least
two degrees. The compressor will start
and, the electric will also energize after a
30 second delay, thus two-stage heating.
The electric heat will run for a minimum
of two minutes and until the deviation

betweenroomtemperatureandsetpoint
temperatureislessthantwodegrees.At
thattimetheelectricheatwillswitchoff
andtheheatpump(compressor)willtake
overtheheatingdemand.Theelectric
heaterwillnotre-startuntilathreeminute
delayhaselapsed.Oncetheroomtem-
peratureissatisfiedandthetwo-minute
minimumruntimehaselapsed,thecom-
pressorwillcycleoff.Thecompressorwill
notre-startuntilathreeminutedelayhas
elapsed.Thefanwilloperateasdescribed
in"FanOperation".
peraturebytwodegrees,heatingwillstop
andcoolingwillcontinuetobringtheroom
temperaturebackdowntosetpointtemper-
ature.Thefanwilloperatecontinuouslyat
lowspeedwhileinDryMode.
Inordertopreventshortcyclingthere
isatwominuteminimumontimeforboth
coolingandheating.Theminimumofftime
is3minutes.Alsothereisa30secondde-
laybetweenthestartofthecompressor
andthestartoftheheatsource.
ForDryModeoperationtheunitmust
haveanelectricheater.Alsothecontrol
mustfirstbeconfiguredproperly(Heat
source-"ON").See:ConfigurationInter-
facemode.
Drymodewillremovehumidityfrom
theairwhilemaintainingaspecificsetpoint
temperature.Thisisdonebyenergizingthe
compressorincoolingalongwiththeelectric
heater.Drymodewillnotmaintainaspecific
humiditylevel.Theunitmustbeequipped
withanoptionalelectricheatelement.
ForDryModeoperation,firstturnthe
unitonviatheON/OFFbutton.SelectDry
modeviatheMODEbutton.Theroom
temperatureandsetpointtemperaturewill
bedisplayed.PresseithertheUporDown
arrowbuttonstochangethesetpointtem-
perature.Thesetpointtemperaturewill
changebyonedegreewitheachsucces-
sivepressoftheUporDownarrowbut-
tons.Holdingthebuttoninwillchangethe
temperaturerapidly.
Placethesetpointtemperatureata
desiredroomtemperature.Dependingon
thedifferencebetweenroomtemperature
andsetpointtemperaturethecompressor
and/orheatsourcewillenergize.Ifthe
roomtemperatureandsetpointtempera-
turearethesamethecompressorwillop-
erateincoolingandtheelectricheatwill
alsoenergize.
Shouldtheroomtemperaturefallbe-
lowthesetpointtemperaturebytwode-
grees,thecompressorwillstopandheating
willcontinuetoboosttheroomtemperature
backuptosetpointtemperature.Iftheroom
temperaturerisesabovethesetpointtern-
ForAutoChangeoverMode(ACO)
theunitmusthaveaheatsource.Alsothe
controlmustfirstbeconfiguredproperly
(Heatsource- "ON").See:Configuration
Interfacemode.
AutoChangeovermodewilloperate
eitherCoolingmodeorHeatingmode.
Thecontrolwillselectthemodeofopera-
tiondependingonthesetpointtempera-
ture,roomtemperatureandthedifferen-
tialsettingselectedintheConfiguration
mode(SeeConfigurationmode).
ForAutoChangeovermode,firstturn
theunitonviatheON/OFFbutton.Select
AutomodeviatheModebutton.Theroom
temperatureandsetpointtemperaturewill
bedisplayed.PresseithertheUporDown
arrowbuttonstochangethesetpointtem-
perature.Thesetpointtemperaturewill
changebyonedegreewitheachsucces-
sivepressoftheUporDownarrowbut-
tons.Holdingthebuttoninwillchangethe
temperaturerapidly.
Placethesetpointtemperaturebe-
lowtheroomtemperaturebythedead
bandamountselectedintheconfigura-
tionmode.Thecompressorwillstartand
theunitwillruncoolingoperationasde-
scribedunder"CoolMode".
Ifthesetpointtemperatureisabove
theroomtemperaturebythedeadband
amountselectedin the configuration
mode,theunitwillrunheatingoperation
asdescribedunder"HeatMode"
The"TIME"buttonisusedtoenter
orexittheSetTimemode.TheSetTime
modecanbeenteredwhilethecontrolisin

anymodeincludingtheOffmode.Toen-
tertheSetTimemode,pressthe"TIME"
buttonin for threeseconds.Pressing
the"PROG"(NEXT)buttonwilladvance
tothenextitem.Theorderis(1)Dayof
week,(2)Hourand(3)Minute.Pressing
the"MODE"(BACK)buttonwillreturnto
thepreviousitem.Thetimeofdayand
dayofweekcanbechangedusingtheup
ordownarrowbuttons.
Whenthe"TIME"buttonispressed
againorleftidlefor20seconds,thecon-
trolshallsavethenewsettingsandreturn
tothepreviousmode.
The7-dayprogrammingmodeisused
tostorethesettingsforthePre-program
Runmode.
WhentheunitisineithertheOfforRun
mode,the7-DayProgrammingmodecan
beenteredbypressingthe"PROG"and
"TIME"buttonssimultaneouslyforthree
seconds.Whenthe"PROG"and"TIME"
buttonsarepressedsimultaneouslyagain
orleftidlefor20seconds,thecontrolshall
savethenewsettingsandreturntothe
previousinterfacemode.
Whileinthe7-Dayprogrammingmode,
usetheupordownarrowstochangethe
time,temperatureorperiodsettings.Use
the"MODE"(BACK)or"PROG"(NEXT)
buttonstoselectthemodetobechanged.
Settingsfor(1)Dayofweek,(2)Pe-
riodofday,(3)Hour,(4),Minute,(5)Cool
setpointtemperature,(6)Heatsetpoint
temperatureand(7)Autosetpointtem-
peraturecanbeentered.
Quickcopyisafeatureofthe7-day
programmingmode.Itisusedtocopythe
settingsofanydaytotherestoftheweek.
Whilein7-dayprogramming,selectthe
daytobecopied.Then,pressthe"FAN"
and"PROG"buttonssimultaneouslyfor
threeseconds.Theselecteddaywillbe
copiedtotherestoftheweek.
Thisisnormaloperating(nonpre-pro-
gramrun)mode.Settingsfortemperature,
modeandfanspeedareselectedbythe
userandwillnotchangewiththepassing
oftime.Theword"PROGRAM"doesNOT
displayontheLCD.
Thisfeatureallowsthesetpointtem-
peraturetobechangedaccordingtothe
pre-programmedsetpointandtimeofday
settings.Thesetpointandtimesettings
areprogrammedintothecontrolthrough
the7-dayprogramminginterface.
ThePre-programmedRunmodecan
beenteredfromCool,HeatorAutomodes
only.Pre-programmedrun modecan-
notbeenteredfromDryorFanmodes.
Pressingthe"PROG"buttonmomentari-
lywillenterorexitthePre-programrun
mode.Theword"PROGRAM"willappear
intheLCDdisplay.Then,withthepass-
ingoftime,thesetpointwillchangetothe
programmedsettingatthetimeselected.
Toaidinfiltermaintenance,themicro-
processorwillkeeptrackoftheunitsrun
time.Then,afterthefilterchecktimehas
elapsed,a"FILTERCHECK"warningwill
appeartheLCDdisplay.Thefiltercheck
timeisselectablethroughtheconfigura-
tionmode.Availablesettingsare250,
500,750,1000,and1250hours.Alsoif
fourevaporatorfreezeupsoccurwithina
24hourperiod,(SeefaultconditionE03)
thefiltercheckindicatorwillappear.
Afterfiltermaintenancehasbeenper-
formed,pressthe"MODE"and"FAN"but-
tonssimultaneouslyforthreesecondsto
clearthefiltercheckwarning.