Sanyo Stw 2 Series User Manual

OWNER’S MANUAL  
PACKAGED TERMINAL AIR CONDITIONER  
Cool / Heat Model  
STW-2 Series  
Operating Instructions  
Contents  
Page  
Alert Symbols ........................................................... 1  
Installation Location ................................................ 2  
Electrical Requirements .......................................... 2  
Safety Instructions................................................... 2  
Names of Parts ......................................................... 2  
Control Panel and Operation Functions ................ 2  
Front Grille................................................................ 3  
Other Features.......................................................... 3  
Care and Cleaning.................................................... 4  
Tips for Energy Saving............................................ 5  
Troubleshooting ....................................................... 5  
Installation Instructions  
Contents  
Model No.  
Page  
STW-2 Series  
IMPORTANT!  
Power Source:  
Please Read Before Starting................................... 6  
1. NAMES OF PARTS............................................. 7  
2. WALL CASE AND REAR GRILLE..................... 7  
3. INSTALLATION................................................... 7  
4. PERMANENT CONNECTION............................. 8  
4-1. For 230/208V Units...................................... 8  
4-1-1. Preparation ........................................ 8  
60 Hz, single-phase, 230/208V & 265V  
Alert Sym bols  
The follow ing symbols used in this manual alert you to potential-  
ly dangerous conditions to users, service personnel or the appli-  
ance:  
4-1-2. Installation.......................................... 8  
4-2. For 265V Units............................................. 8  
4-2-1. Preparation ........................................ 8  
This sym bol refers to a hazard or  
unsafe practice w hich can result in  
severe personal injury or death.  
WARNING  
4-2-2. Installation.......................................... 8  
5. AIR LOUVERS.................................................... 9  
6. TEMPERATURE LIMITING................................. 9  
7. REMOTE CONTROL ........................................ 10  
8. FRONT DESK CONTROL ................................ 10  
PRODUCT INFORMATION............................... 11  
This sym bol refers to a hazard or  
unsafe practice w hich can result in  
personal injury or product or prop-  
erty dam age.  
CAUTION  
85164119653000  
© SANYO 2001  
SANYO Electric Co., Ltd.  
Osaka, Japan  
W
Operation:  
Front grille  
1. Set the m ode selector for fan, cooling or heating opera-  
Louver screws  
tion.  
2. Set the therm ostat to the desired position. (Refer to the  
Setting Tem perature Guide on page 2.)  
NOTE  
The tem peratures at the Setting Tem perature Guide on  
Page 2 are provided for reference only, and m ay differ  
from the actual tem perature of the room .  
How to stop the air conditioner:  
Set the m ode selector to OFF position.  
The direction of the heated or cooled air m ay be adjusted  
by rem oving and turning the louvers around.  
How to restart the air conditioner:  
Set the m ode selector to the desired position.  
Front Grille  
To rem ove:  
Additional controls are located behind the front grille.  
Pull out to release it from the tabs. Then lift up.  
37° OFF VERTICAL  
20° OFF VERTICAL  
2
Other Features  
Front grille  
Ventilation Control  
The ventilation control lever is located at the upper left  
side of the unit, behind the front grille.  
1
This knob is set to CLOSE at the factory. When in this  
position, the vent door is closed and only indoor air is cir-  
culated by the air conditioner. Switching the knob to  
OPEN opens the vent door to allow outdoor air to enter  
the room . However, leaving the vent door at OPEN  
reduces heating or cooling effectiveness and increases  
operating costs.  
To reinstall:  
Place the tabs over the top rail. Push inward until it snaps  
into place.  
1
2
Air Louvers  
Ventilation control lever  
To change the louver direction, rem ove the front grille and  
2 louver screws that hold the louvers in place. Turn the  
louver section 180° (end for end), replace the screws and  
replace the front grille. The textured face of the louver  
section m ust be facing toward the room side.  
Rem ote Control  
Rem ote controlling is available with the optional Class 2  
Rem ote Controller and Interface kit. See the Installation  
Instructions.  
3
Fan Cycle Sw itch  
Care and Cleaning  
Turn off the air conditioner before cleaning.  
Air Filters  
The air filters should be cleaned at least once every two  
weeks. Clogged filters reduce cooling, heating and air  
flow.  
The Fan Cycle Switch is located under the control panel  
behind the front grille. This switch is set to CONT at the  
factory to provide continuous fan operation in cool or  
heat m odes. Leaving the switch at the CONT setting  
allows continuous circulation of room air and will keep  
the room tem perature at stable condition. If you want the  
fan to cycle on and off with the com pressor or electrical  
heater, set the switch to CYCLE.  
Keeping these filters clean w ill:  
• Decrease cost of operation.  
Save energy.  
• Prevent clogged heat exchanger coils.  
• Reduce costly com pressor problem s.  
THERM  
OS  
TAT  
SELECT  
OR  
N
OFF  
LO  
T
HIGH  
FA  
W
LO  
W
HEA  
To rem ove the air filters:  
COOL  
HIGH  
COOL  
HEA  
T
W
ARMER  
COOLER  
Pull up  
2 air filters  
Knob  
Front  
Control panel  
THERMOST  
AT  
SELECT  
FAN  
OR  
To clean the air filters:  
Vacuum off heavy dirt.  
OFF  
LOW  
LOW  
COO  
HEAT  
L
HIGH  
HEA  
HIG  
COO  
H
T
L
WA  
RM  
ER  
COOLER  
• Run water through the filters.  
• Dry thoroughly before replacing.  
To reinstall the air filters:  
CYCLE  
CONT  
Push  
down  
Fan cycle switch  
Freeze Protection  
Freeze Protection helps prevent plum bing dam age due to  
sub-freezing tem peratures — even if you have turned the  
m ode selector switch to OFF. The unit autom atically turns  
on the heater and fan if the room tem perature falls to  
about 46°F.  
NOTE  
Do not operate the air conditioner without the filters in  
place. If a filter becom es torn or dam aged it should be  
replaced im m ediately. Operating the unit without the fil-  
ters in place or with dam aged filters will allow dirt and  
dust to reach the indoor coil and reduce the efficiency of  
the unit.  
You do not have to do anything to activate the Freeze  
Protection. It will work as long as power to the unit has  
not been interrupted.  
Replacem ent filters (STK01AF) are available from the deal-  
er or installer.  
Front Grille & Wall Case  
Wash the front grille and wall case finish with m ild soap  
or detergent and lukewarm water.  
4
Control Panel  
Troubleshooting  
The control panel is shipped with a protective plastic  
film . This film can be left on or rem oved. To clean, use a  
dam p cloth and m ild detergent.  
PROBLEM  
POSSIBLE CAUSE  
AIR CONDITIONER • The power cord is not plugged in or  
DOES NOT  
OPERATE  
circuit breaker is tripped.  
Outdoor Coil  
The coil on the outdoor side of the unit should be  
checked periodically and cleaned if clogged with dirt or  
soot from the atm osphere. If extrem ely dirty, it m ay need  
to be professionally steam cleaned.  
AIR CONDITIONER • The unit is waiting for the compressor  
DOES NOT COOL  
OR HEAT AS IT  
SHOULD”  
overload protector to reset.  
• Curtains, blinds or furniture blocking  
the front of the air conditioner are  
restricting the air flow.  
Base Pan  
In som e installations, dirt or other foreign m atter m ay be  
blown into the unit from the outside and settle in the  
base pan (the bottom of the unit). Check the base pan  
periodically and clean it out, if necessary.  
• Thermostat control may not be set  
high/low enough. Turn the control to a  
lower or higher position. (NOTE: In  
some installations, the thermostat  
control cannot be turned all the way to  
the highest end or lowest end. This is  
normal. Do not attempt to force the  
control beyond its stopping points.)  
Tips for Energy Saving  
Do not  
• A dirty air filter is blocking air flow.  
The filter should be cleaned at least  
once every 2 weeks. See the instruc-  
tions in the cleaning section.  
Block the air intake and outlet of the unit. If they are  
obstructed, the unit w ill not w ork w ell, and m ay be  
dam aged.  
• Let direct sunlight into the room . Use sunshades,  
blinds or curtains. If the walls and ceiling of the room  
are warm ed by the sun, it will take longer to cool the  
room .  
• The room m ay have been very hot or  
very cold when the air conditioner  
was first turned on. Allow tim e for it  
to cool down or warm up.  
• The ventilation control m ay be set to  
the OPEN position, allowing outside  
air to enter the room .  
Do  
• Keep the air filter clean. (Refer to “Care and  
Cleaning.”)  
• Dust on the surface of the electrical  
heater can cause a “burning” odor at  
the beginning of the heating opera-  
tion. This odor should quickly fade.  
BURNING” ODOR  
AT START OF  
HEATING  
A clogged filter will im pair the perform ance of the unit.  
To prevent conditioned air from escaping, keep win-  
dows, doors and any other openings closed.  
• Keep the ventilator closed for econom y and m axim um  
cooling.  
OPERATION  
• Relay clicks m ay be heard when the  
com pressor or fan cycles on and off.  
This is norm al.  
OPERATING  
SOUNDS  
• The fan runs continuously when the  
unit is operating unless the Fan Cycle  
Switch under the control panel is set  
to CYCLE. In this case, the fan cycles  
on and off with the electrical heater  
or com pressor.  
AIR IS NOT  
• The Fan Cycle Switch m ay be set to  
Fan Cont (continuous). This causes  
the fan to blow room air even when  
the com pressor is off. The continuous  
air flow provides better overall tem-  
perature control.  
ALWAYS COOL  
DURING COOLING  
OPERATION  
• The Fan Cycle Switch m ay be set to  
Fan Cont (continuous). This causes  
the fan to blow room air even when  
the electrical heater is off. The contin-  
uous air flow provides better overall  
tem perature control.  
AIR IS NOT  
ALWAYS HOT  
DURING HEATING  
OPERATION  
5
INSTALLATION INSTRUCTIONS  
• DO NOT turn the air conditioner on and off by plugging  
and unplugging. Use the Operation switch (SELEC-  
TOR).  
IMPORTANT!  
Please Read Before Starting  
• Follow National Electrical Code (NEC) and local codes,  
ordinances and regulations. All wiring — including  
installation of receptacles, must be in accordance with  
these codes.  
This air conditioner meets strict safety and operating stan-  
dards. As the installer or service person, it is an important  
part of your job to install or service the system so it oper-  
ates safely and efficiently.  
• The NEC requires permanent connection for installa-  
tions over 250 volts.  
For safe installation and trouble-free operation, you  
must:  
• Protective devices (fuses or circuit breakers) accept-  
able for this air conditioner are specified on the name-  
plate of each unit.  
Carefully read this OWNER’S MANUAL before installa-  
tion and service.  
• Aluminum building wiring may pose special problems  
— consult a qualified electrician.  
Follow each installation or service step exactly as shown.  
Observe all local, state, and national electrical codes.  
When Transporting  
Pay close attention to all warning and caution notices  
given in this manual.  
Be careful when picking up and moving the air conditioner.  
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.  
This symbol refers to a hazard or  
unsafe practice which can result  
in severe personal injury or death.  
WARNING  
This symbol refers to a hazard or  
unsafe practice which can result  
When Servicing  
CAUTION  
in personal injury or product or  
property damage.  
• Turn the power OFF at the main power box (mains)  
before opening the unit to check or repair electrical  
parts and wiring.  
If Necessary, Get Help  
• Keep your fingers and clothing away from any moving parts.  
These instructions are all you need for most installation  
sites and maintenance conditions. If you require help for a  
special problem, contact our sales/service outlet or your  
certified dealer for additional instructions.  
• Clean up the site after you finish, remembering to  
check that no metal scraps or bits of wiring have been  
left inside the unit being serviced.  
Tools Needed  
SPECIAL PRECAUTIONS  
When Wiring  
Phillips screwdriver  
Flat blade screwdriver  
Others  
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSON-  
AL INJURY OR DEATH. ONLY A QUALIFIED, EXPERI-  
ENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE  
THIS SYSTEM.  
CAUTION  
• All wiring must conform to local electrical codes.  
• Before starting the installation, the power to the direct  
connect wiring should be set to OFF.  
• Each unit must be properly grounded with a ground (or  
earth) wire or through the supply wiring.  
• DO NOT, under any circumstances, cut or remove the  
third (ground) prong from the power cord plug.  
• Ventilate any enclosed areas when installing or testing the  
refrigeration system. Escaped refrigerant gas, on contact  
with fire or heat, can produce dangerously toxic gas.  
• Never use an extension cord with this air conditioner.  
• DO NOT use a damaged power cord, plug, or wall out-  
let. Replace them immediately.  
• Confirm upon completing installation that no refrigerant  
gas is leaking. If escaped gas comes in contact with a  
stove, gas water heater, electric room heater or other  
heat source, it can produce dangerously toxic gas.  
• DO NOT change the internal wiring or any part of the  
system.  
6
1. NAMES OF PARTS  
3. INSTALLATION  
1) Rem ove the front grille by pulling out at the bot-  
tom to release it, then lift it up to clear the rail  
along the chassis top.  
Rear grille/louver**  
Wall case**  
Front grille*  
Chassis  
2
1
* Shipped with the chassis  
** Check essential components list on chassis  
2) Slide the chassis into the wall case and secure  
with four screws through the chassis flange  
holes.  
2. WALL CASE AND REAR GRILLE  
1) The STK01WC wall case m ust be properly  
installed according to the instructions packed with  
the case.  
Wall  
2) Rem ove the corrugated stiffener and the outdoor  
protective panel. Use the slit in the outdoor panel  
as a grip and push out.  
3) Install the rear grille from the room side according  
to the instructions packed with the grille.  
Slit  
Protective panel  
Wall case  
3) Reinstall the front grille by hooking the top over  
the rail along the chassis top, then pushing it in  
at the bottom .  
Stiffener  
1
2
7
4. PERMANENT CONNECTION  
Screw A  
4-1. For 230/ 208V Units  
Electrical  
junction box  
The 230/208V m odel is equipped for connection  
with a power cord according to the unit capacity  
at the tim e of shipm ent.  
Power cord  
Should local codes or special requirem ents speci-  
fy perm anent connection of this unit, use optional  
adapter kit (Cover plate and Bottom plate)  
STK02J B.  
Screw B  
Bottom plate  
A power cord is supplied with 230/208V units. For  
direct-connect applications, the power cord is cut  
and a wire nut connection is m ade to the building  
power supply. The cover plate and bottom plate  
are the junction box kit. The conduit and wire  
nuts are supplied by the installer.  
Conduit  
Cover plate  
4-1-1. Preparation  
4-2. For 265V Units  
1) The electrical rating m arked on the previously  
installed air conditioner m ust be the sam e as the  
supply branch circuit.  
All 265V units are direct connected and com e  
with the cover plate (junction box) and bottom  
plate. The conduit is field-supplied by the  
installer.  
2) The m odification kit provides for connection of  
1/2" trade size electrical conduit and connection to  
a wiring system in accordance with the National  
Electric Code, ANSI/NFPA No. 70-1999.  
4-2-1. Preparation  
1) The electrical rating m arked on the previously  
installed air conditioner m ust be the sam e as the  
supply branch circuit.  
4-1-2. Installation  
1) Rem ove the Front Grille from the chassis by lift-  
ing out and up.  
2) The unit provides for connection of 1/2 trade size  
electrical conduit and provision for connection to  
a wiring system in accordance with the National  
Electrical Code ANSI/NFPA No. 70-1993.  
2) Cut the power cord approxim ately 6" from the  
Electrical J unction Box.  
4-2-2. Installation  
Cut  
1) Remove the front grille from the chassis by lifting  
out and up to clear mounting brackets. (See “Front  
Grille” on page 3.)  
Approx. 6"  
2) Rem ove the “A” screw and cover plate from the  
m ounting plate.  
Power plug  
Electrical junction box  
Screw A  
3) Split and strip the wires as shown above.  
4) Install the Bottom Plate using the provided field  
supplied conduit and power supply conductors to  
the unit with screw “B”.  
Screws  
5) Connect Power Supply wires to the stripped inner  
wires with the wire nuts.  
6) Dress the wiring inside the com partm ent and  
attach the cover plate with screw “A”.  
7) Reinstall the Front Grille.  
Cover plate  
Bottom plate  
8
3) Attach the field-supplied conduit to the  
bottom plate.  
6. TEMPERATURE LIMITING  
The norm al range of the therm ostat control is  
approxim ately 55°F to 88°F. The control range m ay  
be narrowed by the use of the Tem perature Lim iting  
screws located behind the control panel.  
4) Connect the power supply conductors to  
the Term inal block and the Grounding  
screw.  
5) Attach the cover plate.  
Repositioning the screw on the left will lim it the  
m axim um tem perature about 3.7°F for each hole in  
a clockwise rotation; the screw on the right will lim it  
the m inim um tem perature when m oved counter-  
clockwise. Lim iting the m axim um and m inim um set-  
tings prevents users from turning the controls to  
extrem e positions. Restrictions to full rotation of the  
therm ostat knob m ay require explanation to the  
room occupant that the unit will provide com fort-  
able conditions at the settings allowed.  
Terminal block  
Grounding screw  
Cover plate  
Bottom plate  
Conduit  
To access the lim iting screws, rem ove the front  
grille, the therm ostat knob and the operation knob  
by pulling each knob off its shaft and the control  
panel. (See the illustration “Fan Cycle Switch” on  
page 4.) Set the lim iting screws to the desired set-  
ting, and replace the control panel and the control  
knobs. If the settings do not allow sufficient room  
tem perature control, the lim iting screws m ay have  
to be repositioned.  
6) Reinstall the front grille. (See “Front  
Grille” on page 3.)  
Stop link  
Tapped holes (10)  
5. AIR LOUVERS  
The direction of the heated or cooled air m ay be  
adjusted by rem oving and turning the louvers  
around.  
Thermostat  
shaft  
(Warmest)  
(Coldest)  
Temperature limiting screws (location at shipment)  
When the lim iting screws are relocated, it is recom -  
m ended that the screws be set no higher than the  
second hole from the original bottom position. This  
provides an operating range between approxim ately  
58°F and 80°F. In order to m axim ize the benefit of the  
tem perature lim iting, it m ay be necessary to adjust  
the lim iting screws seasonally, m aintained at m oder-  
ate tem peratures (i.e., heating season tem peratures  
lim ited between 60°F and 75°F; cooling season tem -  
peratures lim ited between 85°F and 65°F).  
To change the louver direction, rem ove the front  
grille and 2 louver screws that hold the louvers in  
place. Turn the louver section 180° (end for end),  
replace the screws and replace the front grille. The  
textured face of the louver section m ust be facing  
toward the room side.  
Front grille  
Louver screws  
9
7. REMOTE CONTROL  
8. FRONT DESK CONTROL  
The unit m ay be controlled either by the unit-m ount-  
ed controls (Control Panel) or by optional Class 2 ther-  
m o controller (SC2001 for Cool/Heat Model and  
SC2201 for Heat Pum p Model) with optional Interface  
kit (STK02LVC). Detailed instructions are included in  
the kit.  
The unit m ay be connected to a switch at the front  
desk to control on and off operation of the com pres-  
sor or heater from the front desk with the optional  
interface kit. (See the picture below.) When the switch  
is set to OPEN, the unit is operable. When the switch  
is set to CLOSED, the unit is m ade inoperative.  
Detailed hook-up instructions are in the interface kit.  
Follow the recom m ended wire sizing in the table  
below. Two wires m ust be used from each FDC switch  
to each individual unit.  
FDC  
Class 2 Remote  
Good wiring practices (e.g. twisted pairs, SEPARA-  
TION FROM POWER CIRCUITS) m ust be followed to  
m inim ize induced voltages which m ay harm the con-  
trol system . Do not use a com m on line in the FDC  
wiring.  
Low voltage  
Terminals on Interface kit  
A 24V A/C transform er is contained within the unit  
and no external voltage should be applied to the unit  
through the FDC switch. The Freeze Protection  
rem ains in active m ode to help protect against low  
tem perature dam age even though the unit m ay be  
OFF by FDC.  
Recom m ended Wire Size for Front Desk Control  
Installation  
Wire Size #AWG  
Maxim um Allow able Length  
#22  
#20  
#18  
#16  
600 ft.  
900 ft.  
1500 ft.  
2000 ft.  
Interface kit  
(optional)  
Terminals  
10  
Product Inform ation  
If you have problem s or questions concerning your Air Conditioner, you will need the following inform ation.  
Model and serial num bers are on the nam eplate of the cabinet.  
Model No.  
Serial No.  
Date of purchase  
Dealers address  
Phone num ber  
11  
SANYO FISHER COMPANY  
In Canada  
A DIVISION OF SANYO NORTH AMERICA CORPORATION  
21605 plummer Street, Chatsworth, CA 91311 U.S.A.  
SANYO Canada Inc.  
300 Applewood Crescent, Concord, Ontario, L4K 5C7, Canada  

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