Armstrong PWC18E9.2-1, PWC18E7.2-1 Owner’s Manual

Page 1
INSTALLATION AND
MAINTENANCE INSTRUCTIONS
PWC Series "Magic-Pak"
Self-Contained Heat Pump
[ WARNING
Improper installation, adjustment, alteration, service or maintenance can cause injury
or property damage. Refer to this manual. For assistance or additional information,
consult a qualified installer or service agency.
For your safety, do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance. Such
actions could result in property damage, per- sonal injury or death.
TABLE OF CONTENTS
INSTALLATION ....................................... 2
OPERATION .......................................... 5
MAINTENANCE ..................................... 6
Installation and servicing of air conditioning equipment can be hazardous due to internal
refrigerant pressure and live electrical compo- nents. Only trained and qualified service
personnel should install or service this equip- ment. Installation and service performed by
unqualified persons can result in property damage, personal injury or death.
] A CAUTION I These units are not approved for mobile home applications. Such use could result in prop-
erty damage, p_rsonal injury or death.
WIRING DIAGRAMS .............................. 7
WARRANTY ......................................... 10
ManufacturedBy
A.A.C.
A Lennox International Company
421 MonroeStreet
Bellevue,OH 44811
IIIIIIIIIIII)llllllllllllllllllllllllll}lilllllll
I A CAUTION [
The installation of this appliance must conform to the requirements of the National Fire Protection Associa- tion; the National Electrical Code, ANSl/NFPA No. 70 (latest edition) in the United States; the Canadian
Electrical Code Part 1, CSA 22.1 (latest edition) in Canada; and any state or provincial laws or local ordi- nances. Local authorities having jurisdiction should be consulted before installation is made. Such appli-
cable regulations or requirements take precedence over the general instructions in this manual.
Save these instructions for future reference
Page 2
INSTALLATION
General
=.seinstructions explain the recommended method of
,llation of the PWC heat pump unit and associated
e_uctricalwiring.
the unit inside the carton ifthe carton isdamaged. File a cfaimwith the transportation company. If any damages
are discovered and reported to the carrier DO NOT INSTALL THE UNIT, as claim may be denied.
Check the unit rating p'late to confirm specifications are as ordered.
This unit is designed and approved for use as a self- contained air to air heat pump system.
These instructions, and any instructions packaged with mating components and/or accessories, should be carefully read prior to beginning installation. Note particularly any
CAUTIONS or WARNINGS in these instructions and all la- bels on the units.
These instructions are intended as a general guide only, for use by qualified personnel and do not supersede any
national or local codes in any way. Compliance with all local, state, provincial or national codes pertaining to this
type of equipment should be determined priorto installa- tion.
Inspection
Upon receipt of equipment, carefully inspect itfor possible
shipping damage. If damage is found, it should be noted
on the carrier's freight bill. Take special care to examine
PWCInstallation
Location
The design is certified for through-the-wall installation only. The interior portions of the unit may be surrounded by a
closet with clearances to combustible material held to 0" at sides, 0" top and 0" front ofthe plenum.
The grille side of the unit may be flush with, or extend
beyond, the face of the exterior wall, but should not be recessed more than 2" from the face of the building and
should not be obstructed with trees, landscape materials
or building structure.
There is no minimum clearance required on locating the unit to an interior corner of a building. If the unit is to be enclosed, provisions should be made allowing access to
the indoor side of the unit for changing filters and for
inspection. At least 33" of unobstructed space should be provided infront of the indoor side, whether enclosed or
not, to permit removal of the cooling chassis should repairs or inspection be required.
Fin-re 1
Sleeve
F MinimumOpening to
Align with Return Air Opening
In Unit.
VibrationIsolating Matedal
{TopLayer)
Page 3
If the unitis installed in a residential garage, it must be
located or protected to avoid physical damage by vehicles.
The unit must be installed so that no electrical compo-
nents are exposed to water.
I
[A CAUT,ON]
This unit must be installed level to allow for
proper drainage of the chassis base pan and unit drain pan.
Installing With a Wall Sleeve
.
Seal the space between the unit and building opening using a non-hardening caulking compound. The seal
mustbe weathertight to prevent entrance of moisture
and water into the building. Make sure the drain holes in the base are not plugged withcaulking,
Condensate Drain
Install the plastic drain tube (furnished) over the 5/8" O.D.
fitting welded to the center ofthe condensate pan. Con-
nect the other end of the drain tube to trapped drain line
(see Figure 2). The plastic drain connection to the chassis
base is provided so that it may be disconnected from the
permanent drain tubing in the base of unitin the event it
becomes necessary to remove the chassis assetnbly.
[ _, CAUTION l
The sleeve is not intended as the sole support for the unit. An additional support must be
provided near the return opening on the unit
for adequate support. The use of vibration
isolation material between the unit and the support is recommended.
Refer to the installation instructions packed with the wall sleeve and Figure 1 for guidance in assembly and mount-
ing using a wall sleeve.
Make sure the gaskets attached to the sleeve are not damaged.
Seal the space between the wall sleeve and-the building opening with non-hardening caulking compound. The seal
must be weathertight to prevent entrance of moisture and water into the building.
Assure that the unit is completely seated against the gaskets on the wall sleeve.
The drain line should pitch gradually downward at least 1" per 10feet of horizontal run to the open drain.
Be certain that the plastic drain tubing has free drainage and is not crimped or flattened at any bend.
PWC Drain Installation
Drain Pan_
Installing Without a Wall Sleeve
Refer to the following directions and Figure I for guidance
in installing the unit without a wall sleeve:
.
Measure the size of the unit and provide an opening in
an outside wall that will accept the unit. Local ordi- nances may require a steel lintel to support the wall
above the opening. The opening must be square in all 4 corners.
,
Position the unit so that the grilles on the outside face
of the unit are flush or extend beyond the face of the exterior wall, but not recessed more than 2" from the face of the building. Provide a support under the
unit, inside the building. Make sure that the inside
support does not block the return air. The unit should
be installed level
Figure 2
Limitations
The unit should be installed in accordance with all national and local safety codes.
Limitations of the unit and appropriate accessories must also be observed.
The unit must not be installed with any ductwork in the outdoor air stream. The outdoor fan is not designed to
operate against any additional static pressure.
Minimum and maximum operation conditions must be observed to assure maximum system performance with minimum service required. Refer to Table 1 onpage 4 for
the application limitations of the unit.
Page 4
Application Limitations AirFilter
Outdoor Ambient Air Temperature °F
Minimum DB - Cooling Maximum DB
65
Indoor Ambient Air Temperature °F I
Minimum Maximum
DB/WB DB DB,_VB DB
Cool Heat Cool Heat
62/57 50 90/72 80
Table t
Cool Heat
125 75
All indoor return air must be filtered. A permanent-type filter is furnished with the unit, located directly behind the
access panel. Removing the panel permits access to the filter.
The filter should be cleaned at least three times during each of the heating and cooling seasons, or more fre- quently if unusual conditions are encountered. To clean the permanent filter, shake filter to remove excess dirt
and/or use a vacuum cleaner. Wash filter in soap or detergent water and replace after filter is dry. It is not necessary to oil the permanent filter after washing.
If an installation is.made in which it is more desirable to mount the filter exterior to the unit, in the return duct work
or elsewhere, the permanent filter can be used or re- placed with a disposable filter. If a disposable filter is used, use the information provided in Table 2 when sizing
the disposable filter.
Ductwork
Ductwork should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of America (ACCA).
It is recommended that supply and return duct connec-
-'_s at the unit be made with flexible joints.
1ne supply and return air duct systems should be de- signed for the CFM and static requirements of the job.
They should not be sized to match the dimensions of the duct connections on the unit.
Supply duct flanges are shipped flat and must be bent up before attaching the supply duct.
To connect the return duct to the unit, use a straight piece of duct 22" wide by 7" deep. Insert the duct into the return
opening in the bottom of the unit. Flange the duct over the
existing flanges around the opening inside unit. Make sure that all sides of the duct are flanged over to permit removal of cooling chassis if required. Use a flexible
connection to attach remainder of return duct. The return duct should be sealed to the unit casing and terminate
outside the space contai_ningthe furnace.
The return duct must allow for the unit drain pan connections and drain tube.
[ ACAUTION J
no not screw intothe side of the drain pan.
Minimum Required Surface Area
for Disposable Filters
Model Number Filter Area (minimum)
PWC183 - 480 square inches PWC24,3 480 square inches
Table 2
Thermostat
The room thermostat should be located on an inside wall where it will not be subject to drafts, sun exposure or heat
from electrical fixtures or appliances. Follow the manufacturer's instructions enclosed withthe thermostat
for general installation procedures. Color coded insulated
wires (#18 AWG) should be used to connect the thermo- stat to the unit.
Electrical Connections
All wiring must be done In accordance with the
National Electrical Code (NEC), ANSl/NFPA No. 70 (latest edition); Canadian Electrical Code CSA C22.2 Part I (latest edition); or local codes, where they prevail. Any alteration of internal wiring will void certification and warranty.
Units are factory wired for a 230 volt power supply. If power supply is 208 volts, it will be necessary to change a wire connection on unit transformer from
240 volt terminal to 208 volt terminal as shown on the wiring diagram.
Page 5
Usewiringwithatemperaturelimitation of 75 =C mini-
mum. Run the 208 or 230 volt, 60 hertz electric power supply through a fused disconnect switch to the control
box of the unit and connect as shown in the wiring dia- gram located onthe inside of the control access panel.
The unit must be electrically grounded in accordance with local codes or, in the absence of local codes, with the
National Electrical Code ANSI/NFPA No. 70 (latest edition) or CSA C22.2 Part 1 (latest edition).
is time/temperature initiated and temperature terminated
with a maximum defrost time (time-out) of 10 minutes.
Time between defrost cycles is preset at 60ominute
intervals at the factory, but can be field adjusted between
30, 60 or 90 minutes. To field adjust time between defrost cycles, place defrost time plug in the proper position (see
Figure 3). For best performance in Region IV, the PWC243 defrost interval should be adjusted to 30 min-
utes.
Power supply to the unit must be NEC Class 1 and must comply with all applicable codes. A fused disconnect switch should be field provided for the unit. The switch must be separate from all other circuits. If any of the wire supplied with the unit must be replaced, replacement wire must be of the type shown on the wiring diagram.
Electrical wiring must be sized to minimum circuit ampacity marked on the unit. Use copper conductors
only. Each unitmust be wired with a separate branch circuit and be properly fused.
OPERATION
Sequence of Operation
Cooling
When the thermostat is in the cooling mode, the O circuit
is powered which energizes the reversing valve. Upon cooling demand, the thermostat closes circuit R toY and
G. Closing R to Y closes the unit contactor, starting the compressor and outdoor fan. The thermostat automati- cally closes R to G circuit which also brings on the indoor
blower at the same time. Upon satisfying cooling demand, the thermostat will open the above circuits and open the
main contactor, stopping the compressor and outdoor fan.
If the unit is equipped with a time delay, the blower will
continue to operate for 90 seconds which improves
system efficiency.
Defrost controlwill initiate a defrost cycle ifthe time period
has elapsed and the defrost sensor sees a temperature
below freezing. At the start of a defrost cycle, the defrost
control will energize the reversing valve solenoid, shifting the reversing valve and de-energizing the outdoor fan.
The defrost relay will also close, energizing auxiliary heat for increased comfort during defrost. The unit will remain
in defrost mode until the defrost sensor has determined
that the frost has been removed from the coil or a 10-
minute time period has elapsed.
The defrost control is also equipped with a setof pins to
aid in troubleshooting of the defrost system (see Figure 3).
The following is a brief outline of the testing of the defrost
system.
. Defrost sensor must be closed, 32°F or below. If
temperatures are such that switch will not close,
jumper between defrost sensor terminals on the
defrost control,
2. Start system in heating operation.
.
Jumper test pins, A 1/4" quick connect terminal crimped onto a solid wire orbrazing rod works well for
test jumper. Closing test pins speeds up time interval by a factor of 256.
Defrost Control
Heating
Upon heating demand, the thermostat closes circuit R to
Y, which closes the unit contactor, starting the compressor
and outdoor fan. The reversing valve is not energized in
the heating mode. -The thermostat again automatically
brings on the indoor fan at the same time. The second
stage of the thermostat closes circuit R to W, which closes
the unit sequencers, bringing the auxiliary electric heat on.
Upon satisfying heating demand, the thermostat opens
the above circuits and stops unit operation.
Defrost Cycle
Ifthe outdoor ambient conditions are such that frost forms
on the outdoor coil, the defrost control monitors the need for and initiates and terminates defrost cycles as neces- sary to maintain system performance. The defrost control
Defrost
TestPins.,,,=i
Defro=/
TimePlug
Defrost Control Setting Defrost Test Cycle Time
30 minutes 7 seconds
60 minutes 14 seconds
90 minutes 21 seconds
FinHr
Page 6
After closing test pins and appropriate cycle time has elapsed, the reversing valve should shiftto defrost mode and the outdoor fan should stop. After 2 seconds of
defrost operation, the reversing valve should shift back to
",tingoperation and the outdoor fan should start.
System Performance
For maximum performance of this heat pump system, the operating temperatures and pressures should be checked
and superheat determined at Standard ARI test conditions of 82°F outdoor - 80°F indoor dry bulb/67°F wet bulb. If superheat measured deviates from the values given in Table 3, refrigerant charge should be adjusted accordingly for maximum performance.
Motors
The indoor and outdoor fan motors are permanently
lubricated and require no maintenance.
Outdoor Coil
Foreign material should notbe allowed to accumulate on the outdoor coil surface or other parts in the air circuit.
Cleaning should be as often as necessary to keep the coil clean. Use a brush, vacuum cleaner attachment or other
suitable means. Be sure power to unit is shut off before using water to clean the coil.
Care should be used when cleaning the coils so that the coil fins are not damaged.
Suction Superheat
Outdoor
Unit
Model
PWC183 18° - 20° F PWC243 17° - 19° F
Suction Superheat
@ ARI Conditions
82 ° OD
80° IDDB/67 ° IDWB
Table 3
MAINTENANCE
Shutoff all electrical power to the unit before conducting any maintenance procedures. Failure to do so could cause personal injury.
Outdoor Base Drain
Foreign material should not be allowed to clogthe drain hole. inspect and clear drain opening priorto heating season.
Periodic inspection and maintenance normally consists of changing or cleaning filters and (under some conditions) cleaning the coils.
Filter
Inspect the filter once a month. Replace disposable filter
or clean the permanent-type filter as necessary (a mini-
mum ofthree times each heating or cooling season is recommended). Do not replace permanent-type filter with a disposable filter unless an installation was made in which the filter was mounted exterior to the unit (see Air
Filter section on page 4).
Page 7
POWERSUPPLYWITHMIN.
208/230-1-60
75"CCOPPERWIRE
I CIRCUIT1I I (lo_cO_L'qCIRCUIT2I
•; ..; : :
P_D
BLACK
LOWER MOTORvloI_rr
UNE VOLTAGE-FACTORY UNE VOLTAGE-RELD
........ UNE VOLTAGE-RELD (IF USED)
LOW VOLTAGE-FACTORY
.......... LOWVOLTAGE-FIELD
BLUE
7 AND 10 PWC ONLY
I
BLOWER
(
NOTE:
IF ANY OF THE ORIGINAL WIRES ARE REP_, THE
SAME SIZE AND TYPE WIRE MUST BE USED.
CONNECTOR
CONDENSER FAN
BLACK
BROWN
RED
M1
CAPACr_R-RUN
REV
VALVE
©
DEFROST
SENSOR
Connection Diagram
PWC with 5, 7 or 10 KW Heat Strip
Part #41164-3
Fin.r== 4
Page 8
208/230-1-60
:OWER SUPPLY WITH MIN.
75"C COPPER WIRE
I CIRCUIT 1 I CIRCUIT 2
: i : :
:
..... LINE VOLTAGE-RELD
UNE VOLTAGE-FACTORY
........ LINE VOLTAGE-FIELD (IF USED)
LOW VOLTAGE-FACTORY
.......... LOW VOLTAGE-R ELD
BLUE
NOTE:
IF ANY OF THE ORIGINAL
WIRES ARE REPLACED, THE SAME SIZE AND TYPE WIRE
MUST BE USED.
RED
F_
UMrT
BLOWER
m
NT
CAPACITOR-RUN
CONNECTOR
BLOCK
CONDENSER FAN
E_CK
¥
I
I
RED
REV
VALVE
O
DEFROST
Connection Diagram
PWC with 15 KW Heat Strip
Part #42203-2
Page 9
POWER SUPPLY WITH MIN.
208/230-1-60
75"C COPPER WIRE
BLOWER MOTOR
..... UNE VOLTAGE-FIELD
........ UNE VOLTAGE-FIELD (IF USED)
.......... LOWVOLTAGE-FIELD
NOTE:
LINE VOLTAGE-FACTORY
LOWVOLTAGE-FACTORY THERMOSTAT
IF ANY OF THE ORIGINAL WIRES ARE REPLACED, THE
SAME SIZE AND TYPE WIRE MUST BE USED.
BLOWER
CONDENSER FAN
_-RUN
I_)
RE)
RED
BROWN
: : °
!
, POTENTIAL
RELAY
pFUSe_
I
Connection Diagram
PWC with No Heat Strip
Part #45322-1
Fin-r== 6
Page 10
I
Limited Warranty
August 1, 1997
Thiswarran(ygivesyou specificlegalrightsand you may have otherrights
which vary from state/provincetostate/province.
Warrantor: Armstrong Air Conditioning Inc., 421 Monroe St., Bellevue, OH 44811
Armstrong Air Conditioning Inc products are available under the following names: Air Ease, Armstrong Air, American Airs, Concord
Subject to the limitafions.stated in this warranty, we warrant to the first buyer for use the residential heating, cooling or heat pump unit, when installed, operated and maintained as required by this warranty, to be free of defects in workmanship or material for a pehod of five years (two years
for commercial equipment) from the time of installation. We will replace any defective component without cost or expense to you except for the costs of delivery and labor for removal and replacement of the defective component.
Warranty Begins
The warranty period begins when the installafion is complete and the product is ready to operate. You must be able to verity this date whenever a warranty claim is made. Original bill of sale, installer's invoice or other similar document will suffice..If the beginnir_g date cannot be Verified. we will
consider warranty coverage to begin six months after the date the product was shipped from our factory.
Limitations on Implied Warranties
Implied warranties of merchantability or, to the extent applicable, fitness for a particular purpose are timited to five years, the same duration as the basic limited written warranty provided herein. Some states/provincas do not allow limitations on how tong an implied warranty of merchantability or
fitness lasts, so the above limitations dr exclusions may not apply to you.
Only Warranty
This written Limited Warranty is the only warranty made by the warrantor; this warranty is in lieu of and excludes all other warranties, express or
implied. The warrantor does not authorize any person to provide any other warranty or to assume for it any further obligation in connection withthe
warranted product.
What is NOT Covered
I. Cabinets or cabinet pieces.
2. Normal maintenance items such as filters, fan belts, fuses or other consumable items. 3 Damage caused by misuse, failure to maintain properly, accidents or acts of God. 4 External wiring, piping, venting or attachment of accessory products not integral to our product, including without limitation, humidifier,
air cleaner, vent damper, thermostat or other mechanical devices not manufactured by the warrantor.
5 Products that have been operated in a corrosive atmosphere where e concentration of acids, halogenated hydrocarbons or other
corrosive elements causes deterioratfon to metsi surfaces or integral components. NOTE: Operation in a corrosive atmosphere is considered abuse and voids this warranty
6 Products that have NOT been installed in accordance with our published installation instructions, applicable focal, state/provincial or
national codes, ACCA published standards.
7 Products that have NOT been installed by competent, qualified installers. 8 Products that have been moved from their odginai place of installation.
Warranty on Replacement Components
Any replscement component furnished by us will assume the remaining (unused) portion of the Limited Warranty.
Consequential Damages
The warrantor shall not be responsible for any consequential damages caused by any defect in the product. Some state/provinces do not allow the
exclusion or limitations of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
NOTE: After the first year, in the event that a gas or oil heat exchanger is no longer being manufactured by the warrantor, the warrantor will allow a
credit equal to the then current wholesale price of an equivalent heat exchanger towards the purchase of a new Armstrong gas or oil furnace.
This product must be installed, used and cared for in accordance with the instructiott manual You are responsible for required pedodic maintenance or service, such as changing or cleaning of air filters and lubrication or cleaning of components. Failure to properly install, operate or maintain your
unit voids this warranty.
!
Model #
, INSTALLED BY:
Address Telephone #
I ealer
Owner Record
Serial # Installation Date
License #
Page 11
INSTALLATION INSTRUCTIONS
Wall Sleeve Kit CA239
For Use With
HW/HWC/EWC/PWC Series
Magic-Pak Thru-the-Wall Unit
_WARNING
age_
General
Parts List
The wall sleeve isdesignedto facilitatethe installationof
Quantity Description
1 TopPanel 1 BottomPanel
1 Right Side Panel 1 LeftSide Panel
Magic-Pakunits by providingan accurateopeningduring buildingconstruction.The use ofa wall sleeveallowsunits toremain off-siteuntilbuildingconstructionapproaches
completion.
The wall sleeve iscomprisedof four assemblies (top,bottom,and rightand left sides) which easily slip
togetheron the job toform a rectangularbox correctly
sizedto receive a Magic-Pak unit.
2 Squaring Braces
1 TopSupportAngle
2 Side SupportAngles
24 #8 x 3/8" Screws
1 InstallationInstructions
Manufactured By
A.A.C.
A Lennox International Company
421 Monroe Street
Bellevue,OH 44811
Save these instructionsforfuture reference
When inplace and securely fastened, the wall sleeve openingprovideseasy access to the finishedwall pedm-
efarfor caulksealing.
The weather-seal caulkingiseasier to performwhen the sleeveprotrudesbeyondthe finishedwall by 3/8" to 1".
Inspection of Shipment Ifany damage tothe contentsof this kitis found at the
timeof delivery,propernotificationshouldbe made onthe carrier's freight bill.Damage claimsshouldbe filedwith
thecarrierat once. Claimsofshortage shouldbe filedwith the manufacturerwithin 5 days.
1111111Ill1111111111IllIllIIIIIIIIIRillIIIIIIII
Page 12
INSTALLATION
Wall Sleeve Assembly
Toassemble the wall sleeve, refer to the followinginstruc- tionsand Figure 1.
4.
Attachthe supportanglesto top and side panels usingthe #8 x 318"screwsprovided.Two sets of holes are providedin the panels for attaching the support
angles. Use the rowof holes nearest thefront of the sleeveto attach the support anglesfor 1"spacing or the secondset of holesfor 3-3/4" spacing.
1. Slidetop panel over side panels untilretaining clips
are engaged in slottedopenings.
2_
Place side and top assemblydown withthe front
flange againstfloorand slide bottom panel intoside
panelslip strips untiltabs on bottom panels are locked inplace.
3. Attach squaring bracesto top and side panels using
existingholes. (Do not remove braces untilwall sleeve issecured to building.)
Wall Sleeve Assembly
P/N33021B000
Frontof
TopPanel
The wall sleeve must be square in opening before securing sleeve to building. This is requiredto
assure the Magic-Pak unitwill slide intothe sleeve.
8.
Caulk all seams where the bottompaneljoins tothe side panels includingthefront corners ofthe bottom
panel and the top of side panel slipjoints.Caulk sealing is bestaccomplishedafterthe wall sleeve is
assembledbutbefore Risplaced inthe wall opening. Remainingfinalcaulk sealing can be done just after
the sleeve issecured intothe wall opening, if desired, to avoidbreakingthe seal duringhandling.
RightSide Panel P/N 33024B002-
Side SupportAngle PIN 33027BG00- 2 Side=
Squaring
Braces
P/N33048B000
Figure I
LeftSide Panel P/N 33024B001
Page 13
Furthersealing againstair infiltrationmustbe done alter the Magic-Pak unitis installedin the wall sleeve and utility
connectionshavebeen completed (see Sealing/Weath-
erproofing Wall Sleeves section).
sleeveopening. However,if the wall openingcan be larger
inverticaldimensionthan the wall sleeve sothat the bottomcan rest ona sill that isat least 2" higher thanthe bottomof thewall opening,some recessing is permitted.
Wall Sleeve Installation
The wall sleeve may be installedfrom either the insideor outsideofthe building.
Some builderswillattach the wall sleeve to the support wallthroughthe side supportangleswhether they are
insertingthesleeve fromthe outsideor the inside.Othem willuse the side angles simplyas a locating"stop"to achievethe appropriatedimensionwhileshootingfasten- ersthroughthe sides ofthe wallsleeve intothesupporting wall.In either case,the wall sleeve must be fastened to
the supporting wall and notto thefinishedwall.
The sleeve may extend farther than 1"beyondthe finished wall,but reachingtheperimeter ofthe openingfrom inside
for sealing becomes increasinglydifficult.In any case, adequate safety precautionsmust beconsideredto
protectpersonnel.
Instailing Wall Sleeve from Inside
The most popular method of installingthe wallsleeve is from the inside of the buildingwiththe weather seal
appliedfrom the outsideas the finishwall is applied.
Instalflng Wall Sleeve from Outside
Thissillshouldbe recessed further than the sleeve by3/8"
to 1"to permitweather-seal caulking along the bottom
edge withoutpluggingthe drain holes in the sleeve.
The topof the wall opening shouldbe above the topof the
wall sleevebya dimensionequal to or greater than the
amountof the recess in orderto avoid restrictionof the condenserdischargeair.
Sealing/Weatherproofing Wall Sleeves
A highgrade non-hardeningcaulkingcompoundapproved forexterioruse mustbe appliedoutsidearoundthe
perimeterofthe wall sleeveand the finishedwall. Caulk shouldalso beapplied around the sleeve's perimeter and
thefinishedinteriorwall.
Final sealingagainst air infiltrationmust be donealter the Magic-Pakunit is installedin thewall sleeve. For additional
protection,the space between the unit and the wall sleeve shouldbe sealed on all sideswith a bead of sealant.
Wall Sleeve Dimensions (in.)
<.. 1or 3_/4
In manyhigh-rise constructionapplications,contractors insertthe wall sleevesfrom the outsidewhilethewall is
beingconstructed.The two-sidedsupport anglesshould then be attached to the wall sleeve sides at a locationthat
willexceed the thicknessofthe outsidefinish wall bythe
recommended3/8" to 1"dimension.
Forexample, ifthe supportingwall isconcreteblockwith a brickfacing, there is usuallya space betweenthe block and the brick.This space dimensionmust be addedto the widthof the brick (plus3/8" to 1") so thatwhen the sleeve
is inserted intothe blockwall opening, up to the angles and fastened to the blockwallbefore the brickisinstalled,
the sleevewilt protrudebeyondthe finishedbrickby 3/8" to 1",as needed for caulk sealing.
The same applies if the supportingwall iswoodframe.
One may insertthe sleevefromthe outside upto the angleslocated on each side,allowingforthe thicknessof sheathing,finishsiding,and caulk sealing.
Recessed Sleeves
In someapplications,where either the buildingwallsare verythick(over 16") or architecturaldesign dictates,units
can berecessed. Avoidrecessingthewall sleeve ifthe wallopening is requiredto be the same size as the wall
2--I=
I.---- z9- -,4
Flar_es may b_ assembl_l
1"or 5_/4"from this e_e ofthe elc_v_
Figure 2
-$--
I
i
45
I
I
_t._
.16,.._15 or 12_
!
Page 14
I
I_A_T_°.I 4"948°96----I
INSTALLATION
ANDMAINTENANCE
INSTRUCTIONS
PWCSERIES
SELF-CONTAINEDHEATPUMP
ManufacturedBy
ARMSTRONG AIR CONDITIONING INC.
A LENNOXInternationalInc. Company
421 MonroeStreel
Page 15
I PART.OI .,,,,RO..I OATE12''0 I SUPERSEOESI I PAGE2OF,0
GENERAL
Theseinstructionsexplainthe recommendedmethodof installationof the PWCheatpumpunit and associatedelec- tricalwiring.
This unit is designed and approvedfor use as a self-containedairto air heat pump system.
These instructions,and anyinstructions packagedwith maling componentsand/or accessories,shouldbe carefully read priorto beginning installation.Note parliculady anyCAUTIONSor NOTESin theseinstructions andall labels on
the unit.
Theseinstructionsare intendedasa generalguideonly.for use byqualifiedpersonnel,anddo notsupersedeanyna- tionalor localcodesinanyway. Compliancewithalllocal,state, provincial,or nationalcodespertainingtothistypeof
equipmentshouldhe determinedprior to installation.
INSPECTIONOFSHIPMENT
Uponreceiptof equipment,carefullyinspectit forpossibleshippingdamage.Ifdamageis found,it shouldbe noted
on the carder's freightbill. Take specialcareto examinethe unit insidethecartonif the cartonis damaged.File a
claimwith the transportationcompany.
If any damagesare discoveredand reportedto the carrierDONOTINSTALLTHE UNIT as claim may be denied.
Checkthe unitrating plate to confirmspecificationsare as ordered.
CAUTION:INSTALLATIONANDSERVICINGOFAIR CONDITIONINGEQUIPMENTCANREHAZARDOUSDUETO IN- TERNALREFRIGERANTPRESSUREAND LIVE ELECTRICALCOMPONENTS.ONLYTRAINEDANOQUALIFIEDSER-
VICE PERSONNELSHOULDINSTALL,REPAIR,OR SERVICETHIS EQUIPMENT.
WARNING
FORYOURSAFETY DONOTSTOREOR USEGASOLINEOROTHERFLAMMABLEVAPORSANDLIQUIDSINTHE VICINITYOFTHIS ORANY OTHERAPPLIANCE.
NOMENCLATURE:
10 PWC 242 A-1A
1 2 3 4 5
1. ELECTRICHEATING
5 = 5kW 7 = .7kW
10 = 10kW 15 = 15kW
4. ElectricalRatingCode: A=208/230 volts; OOHz; 1 phase,
5. RevisionCode
2. PWC=(HEAT) PUMPWITH COOLING
3. COOLINGCAPACITYTONNAGE 182 = TON
242 = 2 TON 302 = TON
Page 16
PARTNO. I 41194BOg6I DATE I 2-1-96 I SUPERSEDESI 411940094 I PAGE3OFIO
I
LOCATION
Thedesigniscertifiedfor through-the-wallinstallationonly. Theinteriorportionsof theunitmay besurroundedbya closetwith clearancestocombustiblematerial heldto 0" at sides, 0" top and O" frontof the plenum.
Thegrillesideofthe unitmay be flushwith orextendbeyondthe faceof theexteriorwall, butshouldnotberecessed
morethan two(2) inchesfrom the face of the buildingand shouldnotbe obstructedwithtrees, landscapematerials, or buildingstructure.
Thereis nominimumclearancerequiredonlocatinga unittoaninteriorcornerofa building. If theunitisto beenclos- ed, provisionsshouldbemadeallowingaccesstothe indoorsideof the unitfor changingfilters.and forinspection.At least33" of unobstructedspace shouldbeprovidedin front of the indoorside. whetherenclosedor noL to permit removalof the coolingchassisshouldrepairsor inspectionbe required.
If this unit is installedina residentialgarage it mustbe locatedor protectedtoavoidph_,sicaldamageby vehicles. Thisunit must be installedso that no electricalcomponentsare exposedto water.
INSTALLATION
CAUTION:THESLEEVEISNOTINTENDEDASTHESOLESUPPORTFORTHEUNIT. ANADDITIONALSUPPORTMUST BE PROVIDEDNEARTHE RETURNOPENINGON THE UNIT FOR ADEQUATESUPPORT.THE USE OF VIBRATION
ISOLATIONMATERIALBETWEENTHE UNIT ANDTHE SUPPORTIS RECOMMENDED, CAUTION:THIS UNITMUST BEINSTALLEDLEVELFORPROPERDRAINAGEOFTHE CHASSISBASEPANANDUNIT
DRAINPAN. WITHOUTWALLSLEEVE
Measurethesizeoftheunit andprovideanopeninginanoutsidewallthat will accepttheunit. Localordinancesmay require a steellintel tosupportthe wall abovethe opening. This openingmust be squarein all corners.
Positiontheunitsothat the grilleson the outsidefaceofthe unitare flush or extendbeyondthe faceof the exterior wall,but notrecessedmorethantwo(2) inchesfromthefaceof the building. PROVIOEA SUPPORTUNDERTHE UNIT
INSIDETHE BUILDING.Makesure thattheinsidesupportdoesnotblockthereturnair. The unitshouldbe installed
level.
Sealthe spacebetweentheunit and the buildingopeningusinga non-hardeningcaulkingcompound.Thesealmust beweather-tighttoprevententranceof moistureandwater intothe building.Make sure the drainholesin the base
are notpluggedwith caulking.
WITH WALL SLEEVE
Seethe installationinstructionspacked with Ihe wall sleeveto assembleand mountin a wall. Make sure that the
gasketsattachedtothe sleeveare notdamaged.Assurethatthe unit is completelyseatedagainstthegasketsonthe wall sleeve.
Sealspacebetweenwall sleeveand buildingopeningusingnon-hardeningcaulkingcompound.Thisseal must be watertight.
CONDENSATEDRAIN
Install theplasticdraintube(furnished)overthe5/8" O.O.fittingweldedto the condensatepan. Connectotherend
ofthe draintubeto trappeddrain line(See Figure2). Theplasticdrain connectiontothechassisbaseis providedso thatit may bedisconnectedfromthe permanentdrain tubingin the baseof unit in theeventit becomesnecessaryto
removethe chassisassembly.
L
The drain line should pitch gradualtydownwardat least 1" per 10 footof horizontalrun to theopendrain.
Be certainthat the plasticdrain tubing has treedrainageand is notcrimpedor flattenedat any bend.
Page 17
PA.T.O.I ,,,,_,,.0_,I 0','_ I _'"_ I SU"ERSEOESI ""_"00_"I PA_E,'O_,O
FIGURE1
INSTRUCTIONFORSUPPORTINGPWCUNITS
Wall Sleeve
7 x 22 Min. OpeningTo
A#ignwith'Return Air
Openingin Unit.
FIGURE2
DRAINPAN
%
VibrationIsolatingMaterial
Plywood
5/8 " I.D. PLASTIC
(FURNISHED)
CHASSISDRAIN
'ASSEMBLY
(FURNISHED)
5/8" I,O. PLASTIC
TU"BE(FURNISHEO]
RETURN
AIR DUCT\
5/8" O.O. DRAIN
\
_LINEAND TRAP
(iNSTALLERSUPPLIED)
Page 18
.ARTNO.I "f9"Bog I OATEI 2"t'g6I .SUPERSEOESI 4119'0094[ PAGESOFtO
LIMITATIONS
The unit shouldbe installedin accordancewith all nationaland local safetycodes.
Limitationsof the unitand appropriateaccessoriesmustalso beobserved.
The unitmustNOTbe installedwithany ductwork in theoutdoorairstream,Theoutdoor fanisnotdesignedtooperate
againstany additionalstaticpressure.
Minimum and maximum operating conditionsmust be observedto assure maximumsystem performancewith
minimum servicerequired,
TABLE1 - APPLICATIONLIMITATIONS
OUTDOORAMBIENTAIR TEMP. OF INDOORAMBIENTTEMP. °F
MIN, DB- COOL MAX, DB MIN. MAX.
65 COOL HEAT OB/WB DB DB/WB DO
125 75
COOL HEAT COOL HEAT
62/57 50 90/72 80
DUCTWORK
Ductwork shouldbe designedand sized accordingto applicablemethods fromthe Air ConditioningContractorsof
America(ACCA).
It is recommendedthat supplyand return duct connectionsat the unit bemadewith flexible joints.
' The supplyand return airductsystemsshouldbe designedfortheCFM staiicrequirementsofthejob. Theyshould
NOT be sized Io match the dimensionsol the duct connectionson the unit.
NOTE:SUPPLYDUCTFLANGESARESHIPPEDFLATANDMUSTBEBENTUP BEFOREAFI'ACHINGTHESUPPLYDUCT,
ToconnectthereturnducttotheunJt,useastraightpieceofduct22" wideby 7" deep. Insert theductintothe return openingin thebottomoftheunit. Flangetheductovertheexistingflangesaroundtheopeninginsideunit. Makesure
thatall sidesoftheductare flangedoverto permitremovalofcoolingchassisif required.Usea flexibleconnectionto
attachremainderofreturnduct.The returnductshouldbesealedto theunitcasingand terminateoutsidethe space
containingthe furnace,
NOTE:THE RETURNDUCTMUST ALLOWFORTHE UNIT DRAINPANCONNECTIONSAND DRAINTUBE.
CAUTION:00 NOTSCREWINTOTHE SIDEOF THE DRAIN PAN.
AIR FILTER
Allindoorreturn airmustbefiltered.Apermanent-type filter is furnished withtheunit. locateddirectly behindtheac- cess panel. Removingthe panelpermitsaccessto the filter.
The tiltershouldbecleanedatleastthreetimesduringeachofthe heatingandcoolingseasons,ormorefrequently if unusualconditionsare encountered.To cleanthe permanentfiller, shakefilterto removeexcessdirt and/or use
vacuumcleaner. Washtilter in soapor detergentwaterand replacealter filteris dry.
The filter suppliedneed not be oiledalter washing.
Page 19
I PA.TNoI .tt9..o96I DATE12196 I SUPERSEDESI ,rig.DO9.I PAGE,O.tO
It an installation is madein which it is moredesirableto mount the filter exterior totheunit, in the return duct work, or olherwise, either the permanent filter supplied or a disposablefilter maybe used. If a disposable filter is used, the
minimum area required is as follows:
MOOELNO. FILTERAREA(MtN.)
PWC 182 480 sq. in.
PWC242 480 sq. in. PWC302 480 sq. in.
THERMOSTAT
The room thermostatshouldbe locatedonan insidewall whereit wilt not be subjecttodrafts, sun exposureor heat
from electricalfixturesorappliances.Followthemanufacturer'sinstructionsenclosedwiththe thermostatforgeneral installationprocedures.Colorcodedinsulatedwires(#18 AWG)shouldbeusedtoconnectthethermostattothe unit.
POWERAND CONTROLWIRING ELECTRICALCONNECTIONS
ALLWIRINGSHOULDBEDONEIN ACCORDANCEWITH NATIONALELECTRICALCODE,ANSI/NFPA NO.70 (LATEST
EDITION).IN CANADA(_SAC22.2 Part 1 (LATESTEDITION),ORWITH LOCAL CODES,WHERETHEY PREVAIL. NOTE:UNITSAREFACTORYWIREDFORA 230 VOLTPOWERSUPPLY.IF POWERSUPPLYIS 208 VOLTS.IT WILL
BENECESSARYTOCHANGEAWIRE CONNECTIONONUNIT TRANSFORMERFROM240VTERMINALTO20SV TER- MINALAS SHOWNON WIRING DIAGRAM.
Usewiringwitha temperaturelimitationof 75°C rain. Runthe208 or 230 volt,60 hertzelectricpowersupplythrough
a fuseddisconnectswitchtothe controlboxof theunitandconnectas showninthewiringdiagramlocatedon the in-
sideof the controlaccesspanel. The unitmustbe electricallygroundedin accordancewith local codesor in the absenceof localcodeswith the Na-
tionalElectricCodeANSI/NFPA No. 70 (latestedition)or CSAC22.2 Part 1 (latestedition).
Powersupplyto the unit must be N.E.C. Class1, and must complywithall applicablecodes.A fused disconnect switchshouldbe field providedfor the unit. The switchmust be separatefromall othercircuits.If anyofthe wire
suppliedwith the unit must be replaced, replacementwiremustbe of the type shownon the wiring diagram.
Electricalwiringmust besized tominimumcircuitampacitymarkedonthe unit. USECOPPERCONDUCTORSONLYI Eachunit must bewired with a separatebranchcircuitand be properlyfused.
SEQUENCEOFUNIT OPERATION
COOLING- WhenthethermostatisIn the coo[ingmode,theOcircuitis poweredwhichenergizesthereversing valve.
Uponcoolingdemand,thethermostatclosescircuitRtoYand G.ClosingR toY closesthe unitcontactor,startingthe
compressorandoutdoorfan. ThethermostatautomaticallyclosesRto Gcircuitwhichalsobringsonthe indoorblower at thesametime. Uponsatisfyingcoolingdemand,thethermostatwillopentheabovecircuitsandopenthemaincon-
tactor,stoppingthe compressorand outdoorfan. If theunitis equippedwith a timedelay,the blowerwill continueto operate.for 90 secondswhich improvessystemefficiency.
HEATING- Uponheatingdemandthe thermostatclosescircuit R to Y closingthe unitcontactor,startingthe com- pressorandoutdoorfan. The reversing valveis notenergizedin the heating mode.Thethermostatagainautomatical-
ly bringsonthe indoorblower at thesametime. Thesecondstageofthethermostatclosescircuit RtoW closingthe unitsequencers,bringthe auxiliaryelectricheaton.Uponsatisfyingheatingdemandthethermostatopensabovecir-
cuits and stopsunit operation.
DEFROSTCYCLE- If outdoor ambientconditionsare such that frost formson theoutdoorcoil, the defrost control monitorsthe need for andinitiates and terminatesdefrost cyclesasneccessary to maintain system performance.The
defrost controlis time/temperatureinitiated and temperature terminated with a maximum defrost time (time-out)of
10 minutes. Timebetweendefrost cyclesis pre-set at 60 minuteintervalsat thefactory, but canbefield adjustedto
30, 60, or 90 minutes.See illustrationfor field adjustmentofdefrosttiming. For bestperformancein RegionIV, the PWC242defrostinterval shouldbeadjustedto30 minutes.
Page 20
PA...o,I .,,9.o09.I
AN MAINTENANCE
IDNSTALLATION
INSTRUCTIONS
PWCSERIES
SELF-CONTAINEDHEATPUMP
PARTNO.] 4,,94°O94I OA_E] 4-,5-94I SU_RSEOESI .EWI _'AGE_O_IOI
Manulaclured By
ARMSTRONG AIR CONDITIONING INC,
A LENNOXInternationalInc. Company
421 Monroe Slreel
Bellevue, OH44811
Page 21
!
PART NO.
I 4,tg4ooB4I DATEI 4lsg, I SUPERSEOESI NEWI PAGE2OFlO
GENERAL
Theseinstructionsexplainthe recommendedmethodof installationof the PWChealpumpunitandassociatedelec-
trical wiring.
This unil is designed and approvedfor use as a self-contained air Io air heat pump system.
Theseinstructions, andany instructions packaged wilh mating componen[sandlor accessories,should becarefully read prior to beginning inslallation, Nole parlicularly anyCAUTIONSor NOTESin these instructions and all labelson
the unit.
Theseinslructions areintended asa generalguideonly, foruse byqualifiedpersonnel, andtie notsupersedeanyna-
tionalorlocalcodesinanyway. Compliancewithall local, state,provincial,ornationalcodespertainingtothistypeof equipmentshouldbe determinedpriorto instaltalion.
INSPECTIONOFSHIPMENT
Uponreceiptof equipment,carefullyinspectil for possibleshippingdamage. If damageis found, itshouldbenoied
on the carrier'sfreight bill. Take specialcare to examinetheunitinsidethe cartonif thecartonis damaged. Filea claimwilh thetransportationcompany,
If anydamagesarediscovered and reportedtothe carrierDONOTINSTALLTIlE UNIT as claimmaybe denied.
Checkthe unitrating plateto confirmspecifications are asordered. CAUTION:INSTALLATIONAND SERVICINGOFAIR CONDITIONINGEQUIPMENTCAN BEHAZARDOUSDUETOIN-
TERNALREFRIGERANTPRESSUREAND LIVE ELECTRICALCOMPONENTS.ONLYTRAINEDANDQUALIFIEDSER- VICE PERSONNELSHOULDINSTALL,REPAIR,ORSERVICETHIS EQUIPMENT.
FORYOURSAFETY
DONOTSTOREORUSEGASOLINEOROTHERFLAMMABLEVAPORSANDLIQUIDSIN THEVICINITYOFTHIS
I WARNING
ORANY OTHERAPPLIANCE.
NOMENCLATURE:
10 PWC 242 A-1A
1 2 3 4 5
1. ELECTRICHEATING 4. ElectricalRatingCode: 5 = 5kW A=208/230 volts;60 Hz; 1 phase 7 = 7kW
10 = lOkW 5. RevisionCode
15 = 15kW
2. PWC=(HEAT) PUMPWITH COOLING
3. COOLING CAPACITYTONNAGE 182 = 1'IzTON 242 = 2 TON 302 = 2'/2TON
Page 22
I PA,,NO.I ,, g,o094I DATEI '-fS-g'I SUPERSEDESI ,EW I PAGE3OF,O
LOCATION
Thedesign iscertifiedfor through-the-wallinstallationonly.The interiorportionsoftheunit may be surroundedbya cJosetwith clearancesto combustiblematerial heldto O" at sides, 0" topand 0" frontof the plenum.
Thegrille sideofthe unit maybe flush with or extendbeyond thefaceof theexteriorwall,but shouldnotberecessed
more than two (2) inchesfrom the face of thebuilding andshould notbeobstructed with trees, landscapematerials, or building structure.
Thereis no minimum clearancerequired on locatinga unit to an interior cornerof a building. If the unit is tobeenclos- ed, provisionsshouldbe madeallowing accessto the indoorside of the unit tot changingfilters andfor inspection. At
least 33" ol unobstructed space should be provided in fronl of the indoorside, whether enclosed or not, to permit removalof the coolingchassis shouJdrepairs or inspection be required,
If this unit is installed in a residential garageit must be located or protectedto avoidphysical damageby vehicles.
This unit must beinstalled so that no electrical componentsare exposedtowater.
INSTALLATION CAUTION:THESLEEVEIS NOTINTENDEDASTHESOLESUPPORTFORTHEUNIT.ANADDITIONALSUPPORTMUST
BEPROVIDEDNEARTHE RETURNOPENINGONTHE UNITFORADEQUATESUPPORT.THE USE OF VIBRATION ISOLATIONMATERIALBETWEENTHE UNIT AND THESUPPORTIS RECOMMENDED.
CAUTION:THISUNITMUSTBE INSTALLEOLEVELFORPROPERDRAINAGEOFTHECHASSISBASEPANAND UNIT DRAINPAN.
WITHOUTWALLSLEEVE
Measurethesizeofthe unit andprovideanopeningin an outsidewallthat willaccepttheunit. Localordinancesmay require a steel lintelto supportthe wall abovethe opening.This opening must besquare in all corners.
Positionthe unitsothatthe gritles on theoutsideface oftheunit areflush or extendbeyondthe faceof theexterior
wall, but notrecessedmorethan two (2) inchesfromtheface ofthe building. PROVIDEA SUPPORTUNDERTHEUNIT
INSIDETHE BUILDING.Makesure that theinsidesupport does not block thereturn air. The unitshouldbe installed
level.
Sealthespacebetweenthe unitandthebuildingopening usinga non-hardeningcaulkingcompound.Thesealmust be weather-tight toprevententrance ol moisture andwaterinto thebuilding. Make surethe drainholesin thebase
are not plugged with caulking.
WITH WALL SLEEVE
Seethe installationinstructionspacked with the wall sleeveto assembleandamountin a wall. Makesurethat the gaskets attachedtothe sleevearenot damaged. Assurethat the unit iscompletelyseatedagainst the gaskets onthe
wall sleeve.
Sealspacebetweenwail sleeveand building opening using non-hardeningcaulkingcompound.This seal must be
watertight,
CONDENSATEDRAIN
Install theplastic drain tube(furnished) over the5/8" O.D. fitting weldedtothe condensatepan. Connectotherend of the drain tubetotrapped drain line (See Figure2). Theplastic drain connectionto thechassisbaseis providedso that it may be disconnected from thepermanentdrain tubingin the baseof unitin theeventit becomesnecessaryto
remove the chassis assembly.
The drain lineshouldpitch gradually downward at least 1" per 10 loot of horizontal run to the open drain.
Be certainthat the plaslic drain tubing has free drainage and is not crimpedor flattened at any bend,
Page 23
NEW [
I PART.O.I "(940094[ DArEI 4-_5-9'I SUPERSEDES
FIGURE1
INSTRUCTIONFORSUPPORTINGPWCUNITS
WallSleeve
7 x 22 Mio. OpeningTo
Align with ReturnAir
Opening _nUnit.
]
PAGE4 OF 10
FIGURE2
L_
VibrationisolatingMaterial
%
5/8 "I.D. PLASTIC
(FURNISHED)
CHASSISDRAIN
(FURNISHED)
5/8" I.D. PLASTIC
TUBE(FURNISHED)
RETURN
NR DUCT
518" O.O. DRAIN
\
\ \
\
"-UNE AND TRAP
(INSTALLERSUPPLIED)
Page 24
PA,TNOI 4tt94OOB4I DA EI 41594]SUPERSEDESI NEWI PAGE OFtO
LIMITATIONS
The unitshouldbe installedin accordancewith all national and localsafetycodes.
Limitationsofthe unit and appropriateaccessoriesmust alsobe observed.
TheunitmustNOTbeinstalledwithany ductworkin theoutdoorairstream.Theoutdoorfan is notdesignedto operate againstany additionalstatic pressure.
Minimumand maximum,operatingconditionsmust be observed to assure maximumsystem performancewith minimum servicerequired.
TABLE1 - APPLICATIONLIMITATIONS
OUTDOORAMBIENTAIR TEMP. OF
MIN. OB" COOL MAX. OB
65 COOL HEAT
125 75
DUCTWORK
Ductworkshouldbe designed_lndsized accordingtoapplicablemethodsfrom theAir Conditioning Contractorsof
America(ACCA).
It is recommendedthatsupplyand return duct connectionsat the unit be madewith flexible joints.
The supptyandreturn air ductsystemsshouldbedesignedfor the CFMstaticrequirementsof the job. Theyshould NOTbe sizedtomatch the dimensionsof the ductconnectionsonthe unit,
NOTE:SUPPLYDUCTFLANGESARESHIPPEDFLATANDMUSTBEBENTUPBEFOREATTACHINGTHESUPPLYDUCT.
Toconnectthe returnducttotheunit.usea straightpieceof duct 22"wideby 7" deep.Insertthe ductintothereturn openinginthebottomoftheunit. Flangetheductovertheexistingflangesaroundtheopeninginsideunit. Make sure thatallsidesofthe ductare flangedovertopermitremovalofcoolingchassisif required.Usea flexible connectionto attachremainderofreturnduct.Thereturnductshouldbesealedtothe unit casingandterminateoutsidethespace
containingthefurnace.
DB/WB DB DB/WB DB
COOL HEAT COOL HEAT
62/57 50 90/72 80
INDOORAMBIENTTEMP. OF
MIN. MAX.
NOTE:THE RETURNDUCTMUST ALLOWFORTHE UNIT DRAINPANCONNECTIONSAND DRAINTUBE.
CAUTION:DONOTSCREWINTOTHE SIDEOFTHEDRAINPAN.
AIR FILTER
Allindoor return airmust befiltered.A permanent-typefilter isfurnished withthe unit,locateddirectly behindtheac- cess panel. Removingthe panel permits access to the filter.
Thefiltershouldbe cleanedat leastthreetimesduring eachof the heatingandcoolingseasons,ormorefrequently if
unusual conditionsare encountered. To clean the permanent filter, shake filter to removeexcessdirt and/or use
vacuum cleaner. Wash filter in soap or detergent water and replace after filter is dry.
.
The filtersupplied neednot be oiled afterwashing.
Page 25
PARTNO. ] 41194D094 ] DATE ] 4-15-94 ] SUPERSEDES ] NEW ] PAGE6 OF 10
If aninstallation is madein which it is more desirabletomount thefilter exterior totheunit, in the return duct work, or
otherwise, either the permanent filter suppliedor a disposable filter may be used. If a disposable filter is used, the
minimum area required is as follows:
MODELNO, FILTERAREA(MIN.)
PWC182 480 sq. in, PWC242 480 sq. in.
PWC302 480 sq. in.
THERMOSTAT
The roomthermostatshouldbe locatedonan insidewallwhereit willnot be subject todrafts, sun exposureor heat
fromelectrical fixtures or appliances. Followthemanufacturer's instructions enclosedwith thethermostat for general installationprocedures. Color codedinsulated wires (# !8 AWG)should be usedto connectthethermostat to the unit.
POWERANDCONTROLWIRING
ELECTRICALCONNECTIONS
ALL WIRINGSHOULDBEDONEIN ACCORDANCEWITHNATIONALELECTRICALCODE,ANSI/NFPANo. 70 (LATEST
EDITION).IN CANADACSAC22.2 Part 1 (LATESTEDITION),ORWITH LOCALCODES,WHERETHEYPREVAIL:
Usewiringwithatemperaturelimitationof75°C rain. Runthe 208or 230 volt,60 hertzelectric powersupplythrough a fused disconnectswitch to thecontrolboxof the unit andconnectas showninthe wiringdiagramlocatedon the in-
side ofthe control access panel.
The unitmust beelectricallygrounded in accordancewithlocal codesor in theabsenceof localcodeswith the Na-
tional Electric CodeANSI/NFPA No. 70 (latest edition)or CSAC22.2 Part 1 (latest edition).
Powersupplyto the unit must be N.E.C. Class1, and mustcomplywith all applicable codes.A fused disconnect switch should be field providedfor the unit. Theswitchmust be separatefrom all othercircuits. If any ofthe wire supplied with the unit must be replaced, replacementwire must be of the type shown onthe wiringdiagram.
Electricalwiringmust be sized tominimumcircuitampacitymarked on theunit. USECOPPERCONDUCTORSONLY. Eachunit must bewiredwith a separatebranchcircuitand be properlyfused.
SEQUENCEOFUNIT OPERATION
COOLING- Whenthe thermostatis inthe coolingmode,the 0 circuitispoweredwhichenergizesthereversing valve. Uponcoolingdemand,the thermostat closescircuitRto YandG. ClosingRtoY closesthe unit contactor,startingthe
compressorandoutdoorfan. Thethermostatautomatically closesRtoGcircuitwhichalsobrings onthe indoor blower
atthe sametime. Uponsatisfying coolingdemand,the thermostatwill openthe abovecircuitsand openthe maincon- tactor, stoppingthe compressorandoutdoorfan. If the unit is equippedwith a time delay, the blower will coritinueto operatefor 90 seconds which improvessystemefficiency.
HEATING- Uponheating demand the thermostatclosescircuitRto Y closingthe unit contactor,starting the com- pressor andoutdoorfan. Thereversingvalveis.no.t-energizedin the heating mode.Thethermostatagainautomatical- ly brings on the indoorblowerat the sametime. Thesecondstage of thethermostatclosescircuftRto W closingthe
unit sequencers, bring theauxiliary electric heaton. Upon satisfying heating demandthethermostat opensabovecir-
cuitsand stops unit operation.
i
DEFROSTCYCLE- if outdoor ambient conditions are such that frost forms on theoutdoorcoil,the defrost control monitorsthe need for andinitiatesandterminates defrost cycles as neccessarytomaintain systemperformance. The
defrost controlis time/temperature initiated and temperatureterminatedwith a maximum defrost time (time-out) of
10 minutes. Timebetweendefrost cycles is pre-set at 60 minute intervals at the factory, but can be field adjusted to 30, 80, or 90 minutes. Seeillustralion for field adjustment of defrost timing. For best performance in RegionIV, the
PWC242defrost interval should be adjusted to 30 minutes.
Page 26
PA,T,O.I ,tt,,O0,,( [ l SUPERSEOESI NEW l PAGE OFtO
The defrost controlwill initiatea defrosl cycle if the time period haselapsedand the defrost sensordetectsa temperature below freezfng. At the slart of the defrost cycle, Ihe defrost ControlwUIenergize the reversing valve
solenoid,shift(ng the reversing valve and de-energizingthe outdoorfan. Thedefrost reraywilt alsoclose, energizing auxiliary heat for increasedcomfortduring defrost. Theunit will remain in thedefrost mode until the defrost sensor
hasdetermined that lhe frost has been removedfrom the coil or a 10 minute time periodhas elapsed.
FIGURE3
OEFROST
TEST PINS
OEFROST
TIMEJUMPER
T2 = 60 MINUTES
T1 = 30 MINUTES
T3 = 90 MINUTES
Thedefrost controlis alsoequippedwitha setof testpinsto aidintroubleshootingof thedefrost system.Thefollow-
ing is a briefoutline of the testing of the defrost system.
Thedefrostsensorwilt be closedat 32° F or below.If temperaturesare suchthat the switchis notclosed,jumper
between the defrostsensorterminalson the defrostcontrol.
Start the systemin heating operation.
Jumper testpins. A 1/4" quick connectterminalcrimpedontoa solidwireor brazing rod workswellfor testjumper. Closing test pins speedup time intervalby a factor of 256.
DEFROSTCONTROLSETTINGDEFROSTTESTCYCLETIME
T1-30 minutes 7 seconds T2-60 minutes 14 seconds
T3-90 minutes 21 seconds
Afterclosingtest pinsand appropriatecycletimehaselapsed,the reversingvalveshouldshifttodefrostmodeand theoutdoor fan should stop. Aftertwo secondsof defrostoperation, the reversing valveshouldshift back to heating
operation and the outdoor fan shouldstart.
SYSTEMPERFORMANCE
For maximumperformanceof this heatpumpsystem,theoperatingtemperaturesand pressureshouldbechecked
and superheat determined at StandardARItestconditionsof 82°F outdoor- 80°F indoordry bulb/67°F wet burb. If the superheatmeasureddeviatesfrom thevalues in the tablebelow,the refrigerant chargeshouldbe adjustedaccor-
dinglyfor maximum performance.
PWCSUCTIONSUPERHEAT -TABLE2
OutdoorUnit Model
PWC182
PWC242
SuctionSuperheat@ A.R.I. Conditions
18° . 20OF 17° - 19%
Page 27
PARTNOI 4t_g4DOg4I DATE] 4iS-g,I SUPERSEOESI NEWI RAGE8OF_O
[
MAINTENANCE
NORMALMAINTENANCE
WARNING: PRIORTO ANY OF THE FOLLOWING MAINTENANCE PROCEDURESSHUT OFF ALL ELECTRICALPOWERTO THE UNIT. FAILTURETO DOSOCOULDCAUSEPERSONALIN- JURY.
Periodic inspectionand maintenancenormallyconsistsof changing or cleaningfilters and (under someconditions)
cleaning the coils.
FILTER- supplied. Inspectonceamonth.Replacedisposable,or clean permanenttypeasnecessary. DONOTreplace
permanenttypewith disposable.
MOTORS- indoorand outdoortan motors are permanentlylubricatedand requirenomaintenance.
OUTDOORCOIL- Foreignmaterialshouldnot beallowedtoaccumulateontheoutdoor coilsurfaceor otherparts inthe
air circuit. Cleaningshould beasoftenas necessaryto keepthe coil clean. Usea brush,vacuumcleanerattachment, or other suitable means. If wateris used to cleanthecoil, be sure power to the unit is shutoff prior tocleaning.
NOTE:CARESHOULDBE USEDWHENCLEANINGTHE COILSSOTHATTHE COILFINSARENOTDAMAGED.
OUTDOORBASEDRAIN- Foreignmaterial shouldnotbeallowedtoclogthe drain hole.Inspect andclear'drain open-
ingprior to heatingseason.
PHYSICALANDELECTRICALDATA
1/4 _/4
Page 28
I _,,9_Do9.I OA_El .-_5-g_l SU_E.SEOESl .EW I ,_GEgOF,O
llllll llllll
?AND 10 PVC 0NLY
RED
CAP.
_EE EV.OV_
UOI'CR VZOI.[T
Rm
HIGH
U
m.L0W
>(
CmTm
C/P/Z:IT_-RIJ_
eTI
O
/
lira
RE9
8L_X
B.UE
CONNECTION DIAGRAM
V/I.VE
©
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Page 29
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Page 30
,!
PWC
SELF CONTAINED
THRU-THE-WALL HEAT PUMP
Part No. 30790F08g Date 6-1-69
Supersedes 30790G082 Page_of 12
Installation and
Maintenance Instructions
_O,MSTP_,
Page 31
Part N_ 30790F089
Date. 6-1-89
$upereedes 30790G082
FORWARD
This is a self-contained heat pump designed for Installation through an exterior wall. The unit is Underwriters' Laboratories listed under heat pumps and is in compliance with Underwriters Standard, UL 559.
The unit is also certified to the Air Conditioning and Refrigeration Institute as complying to ARI Standard 240. To simplify the proper Installation and to assure that the unit will operate tn conformity with general ac-
cepted safety regulations, you should read carefully the instructions outlined In this manual. Failure to comply with the Installation Instructions, Operating Instructions or Maintenance Instructions, or Alterations of internal widng or parts not specifically outlined within this manual will void the Agency Listing's
and Manufacturer's limited warranty.
KEEP THIS MANUAL IN A SAFE PLACE FOR READY REFERENCE.
Page2__2__of 12
Page 32
PartNo. 307SOF089
Date 6-1-89
Supersedes 30790G082
INTRODUCTION
This manual is intended to familiarize the installer, serviceman, and the user with the installation, operation
and maintenance of this thru-the-wall heat pump. This unit is shipped from the factory in one package completely assemblied and wired. A specially designed
trap assembly is shipped, secured to the air return area in lower front of unit. Check the rating plate to confirm heating and cooling capacities are as ordered and are as shown on the
packaging label.
When this unit is unpacked, a check should be made for any damage. If any damages are discovered, DO
NOT INSTALL THE UNIT. Notify the transportation company and make proper notation on the carders freiaht bill. Damage claims must be filed with the carrier at once.
The manufacturer can assume no responsibility for damages which Occur in transit or for improper Opera- tion of the unit as a result of shipping damages.
Page _of 12
Page 33
Part No. 30?90F089 Date 6-149
Supersedes 30790G082 ,, Page _of 12
TABLE OF CONTENTS "
INSTALLATION
Site Preparation ............................ 5
Condensate and Defrost Drain ................. 6
Electrical Connections ........................ 7-8
Thermostat ............................... 9
Air Filter ......... ; ...................... 9
Duct Work ............................... 9
Unit Checkout Procedure ..................... 10
OPERATION INSTRUCTIONS
Heating Operation .......................... 11
Cooling Operation .......................... 11
System Shutdown .......................... 11
Page
MAINTENANCE AND SERVICE
Air Filter ................................. 12
Chassis Removal ........................... 12
Page 34
Part No. 307g0F089
Date. 6-1-89
Supersedes 30790G082
INSTALLATION
Site Preparation
Tills unit is approved for thru-the.wall installation, with zero clearance to combustible material. The unit must
be installed within a conditioned space to prevent freezing of defrost water in trap assembly and to avoid jacket heat loss and surface condensation problem.
This unit must be installed with the wall sleeve specified for this unit. Refer to the manufacture's specifica- tion sheet for complete information and demensions.
Assemble the wall sleeve in accordance with the instructions furnished with each wall sleeve. Install the wall sleeve level and square in all comers. It is to extend a minimum of 114"to 3/8" maximum
beyond finished wall to permit caulking all around the sleeve without blocking drain holes at bottom front of sleeve.
Before installing unit, Inspect wall sleeve. Make sure the gaskets located on the inside of the outer flanges are firmly attached to the sleeve and are not damaged. Damage or loose gaskets must be repaired before installing unit.
The sleeve is not intended as the sole support for the thru-the-wail unit. An additional support must be pro- vided beneath the front of the unit for adequate support, The use of vibration insulation matedai between the unit and the support is recommended. See Figure 1.
Page_of 12
Wall Sleeve Seal space between wall sleeve and building opening
using non-hardening caulking com-
pound. The seal must be water tight+
g"x 22" rain. opening to align with return
air opening in unit.
Hole for drain. Ddll hole on left
or dgtht side
through base after unit is installed.
FIGURE 1.
Celotex, or equivalent
Plywood
Page 35
Part No. 30790F089 Date 6-1-89
Supersedes 30790G082 Page_of 12
INSTALLATION
Before sliding unit into sleeve, remove 5 screws and washers from top panel. Slide unit into sleeve until the
angle on top of the unit lines up with the top flange of the sleeve, and should almost touch. Fasten unit to sleeve with the 5 screws and washers above.
Condensate and Defrost Drain The condensate drain trap furnished with the unit is a copper tube assembly and is furnished with three
pieces of plastic tubing. To install condensate drain (Reference Figure 2.), connect one of the plastic tube ends over the 5/8" O.D.
fitting welded to the center of indoor condensate drain pan and another end to.the 5/8" O.D. fitting on the chassis base. Connect the third plastic tube end to the open drain trap,
The drain line should pitch gradually downward at least 1 inch per foot of horizontal run to open drain trap.
Be certain that plastic drain tube has free drainage and Is not cdmpad or flattened at any bend. Test drainage by pouring water into drain pan under indoor coil and see that It Is removed rapidly through the drain tubing.
The plastic drain connection Is provided so that tt may be disconnected from the permanent drain tubing in the building without unsoldering tn the event It becomes nceccesaary to remove the refrigeration drawer
assembly. TOTAL DEFROST DRAIN SYSTEM MUST BE LOCATED IN THE CONDITIONED AREA TO AVOID
FREEZING.
FIGURE 2.
Retum air duct (if used)
One 5/8" O.D. copper trap & plastic tubes (3) (furnished)
i,ii_ II
I
I
r-w
|
Drain line must not
be above lowest drain pan fitting.
Alternate route through
return air duct.
/
Indoor coil Drain pan
Chassis base
Use hole provided
on either side of base to exit unit.
5/8" rain. O.D. copper or alum. drain tube
(shaded Item. Pitch 1 In. per ft. Installer supplied)
Open drain trap in conditioned
space to prevent freezing and
damage.
Page 36
PanNo. 307g0F089
Date 6-1_9
Supemedes 30790G082
INSTALLATION
Electrical Connections All wiring to unit must comply with the national Electrical Code NFPA No. 70 or local codes, where they prevail.
ANY ALTERNATION OF INTERNAL WIRING CAN VOID UNDERWRITER'S APPROVAL, ARI CER- TIFICATION AND MANUFACTURE'S LIMITED WARRANTY.
The series and rating plates indicate the operating voltages, phase, ampacities and maximum fuse size and electric heater ratings. Units must never be installed where voltage exceeds 110% of higher voltage indicated on rating plate, or less than the minimum operating voltage on rating plate,
Ratings and BTU output are based on 230 V, 60 HZ supply. Voltages other than this rated voltage will alter the BTU output of this unit. For specific ratings at voltages or frequencies other than that designated con- tact your distributor or the manufacture.
FAILURE OF THE COMPRESSOR AS A RESULT OF OPERATION ON IMPROPER VOLTAGE VOIDS THE COMPRESSOR REPLACEMENT WARRANTY.
Multiple power supply connections must be used when total unit amp draw Is over 48 amps. If multiple power supply connections are used, separate fused disconnects must be Installed for each circuit between the
main panel and the supply terminals In the unit. Circuit No. 1, terminals L1 and L2 on the terminal block Is always used to supply power to the heat pump
section. See Figure 3, 4, and 5.
Page T of 12
Circuit No. 2, terminals L3 and L4 on terminal block (units up to 11.0 KW) or fuse block (units over 11.0 is always used to supply power to electdc heaters.
Single entry supply may be used on units, when total amp draw, (heat pump plus heaters) Is less then 48 amps, and is not In violation of prevailing electrical codes.
Units with 7.2 KW heaters or less are supplied with Internal jumpers between 1.1& 1.3,and L2 & L4 for single entry supply. Remove jumpers between L1 & I..3 and 1.2 & L4 when multiple entry supply is to be used.
Fuse and wire sizing must be in accordance with prevailing electrical codes. See Product Specification sheets or Unit Sedes and Rating Plate for ampacities end maximum fuse.
Page 37
Part No. 30790F089
Date 6-1-89
FIGURE 3.
SINGLE ENTRY SUPPLY
Remove internal for multiple entry Supply.
[]
Supersedes 30790G082
208-230 voit
1 Ph. power supply
I I
I
Page_ of 12
208-230V
1 Ph. power supply
t-_ Circuit I"_
ICircuit
I No.I No.2 I
FIGURE 4,
MULTIPLE ENTRY
SUPPLY
PWC18E4.8, PWGI8E7.2
PWC24E4.8, PWC24E7.2
r I Circuit
I
I
I
I
I
MULTIPLE ENTRY
208.230V
1 Ph power supply
Circuit
No. 2
! No.1
FIGURE 5.
SUPPLY
PWC18E9.2, PWC18E10.7
PWC24Eg.2, PVVC24ElO.7
PWC18E14.7
PWC24E14.7
Page 38
Part No. 30790F089 Date 6-1-89 Supersedes 30790G082 Page_of 12
Thermostat
This unit requires special thermostat for operation. See product specification sheets or label on unit for manufacture's part number. Install the thermostat according to directions furnished with It. Select a loca- tion in a room having the most wall or window area exposed to the outsid_ Locate on an inside wall, away from drafts, sunlight or any heat producing appliances. Connect thermostat wires to pigtail leads on unit
with wire nuts following wire diagrams attached to unit.
Air Filter This unit is supplied with a permanent type high filtration filter, located in front of the indoor coil. If an In-
tallation is made in which it Is more desirable to mount the filter extedor to the unit In the return duct, the
permanent filter supplied can be used or a disposable filter may be used. If a different filter or filters are used the minimum total filter area required is 375 eq. in. of nominal 112inch thick media, if a remote filter
is Installed, the permanent filter supplied with this unit must be removed.
Duct Work Provide duct work sufficiently large enough to handle the air volume at the total external static pressure
not exceeding the rating of the unit published in the Product Specification sheet for the rated cooling air volume.
Connect supply duct to top of unit using canvas connections or other flexible connection to prevent sound transmission Into the duct system.
To connect the return duct to the unit, use e straight piece of duct 21 _" by 9".
Insert duct into return opening in bottom of unit and flange duct over existing flanges around opening In- side unit. Make sure that all sides of the duct are flanged over to permit removal of cooling chassis If re-
quired. Use a flexible connection to attach remainder of return air duct.
Adjustments No adjustments are required or should be attempted regarding any of the components of the heat pump
chassis and supplementary electdc heaters.
The unit should be checked to see that none of the wiring is loose or missing. The plug-in electrical connec.
tors between the cooling chassis and the main control compartment should be checked to make sure the plugs are firmly seated and none of the wires are loose.
Page 39
Part No. 30790F089
Date 6-1-89
Supersedes 30790G082
INSTALLATION
A. Unit Check-Out Procedure - IMPORTANT
1. Filter(s) must be clean and in place as to filter all air passing over
2. Set thermostat to "OFF" position.
3. Check that correct size fuses are installed for unit.
4. All panels must be in place.
5. Turn on main power to unit.
B. Heating Check
1. Set fan switch to "AUTO".
2. Set thermostat lever to lowest temperatuf'e.
3. Set thermostat switch to "HEAT" position (if indoor ambient temperature is near or colder
than thermostat setting, heat pump will start immediately).
4. Slowly adjust thermostat to warmer temperature until first stage heat is activated (com- pressor will start).
5. If'possible, check outdoor fan to make sure it's rotating (this is especially important If heat
pump has been installed for sometime and not running in the winter such that the outdoor fan plenum could be clogged with snow or ice build-up).
6. Check indoor air outlet to verify indoor fan is blowing air and getting warmer.
7. Adjust thermostat lever to at least 5"F warmer temperature So that second stage heat will
activate.
8. Check indoor air outlet for increased heating (higher temperature).
indoor coil,
Page 10 of 12
C. Cooling Check
1. Set thermostat switch, to "OFF" position for minimum of 5 minutes to allow heat pump
pressures to equalize.
2. Set thermostat lever to lowest temperature for cooling
3. Set thermostat switch to "COOl." position (compressor should start unless indoor ambient
is near or colder than thermostat setting).
D. Blower Operation
1. Set thermostat switch to "OFF" position.
2. Set fan switch to "ON". Indoor fan only will operate.
3. Return fan switch to "AUTO". Indoor fan will stop.
Page 40
Part No. 30790F089
Date. 6-1-89
Supersedes 30790G082
OPERATION INSTRUCTIONS
The following instructions are to be followed to obtain years of trouble free operation of your year-around comfort system.
To start unit turn on main power (may have two disconnect switches). If the outdoor temperature is below
indoor temperature, the main power should be turned on 24 hours before starting unit in order to assure no liquid refrigerant is in the compressor crankcase, and to prevent valve damage of compressor.
Operation of this unit is automatic and will provide heating or cooling depending on the setting of the thermostat.
Heating Operation
1. Set thermostat system switch to "HEAT;',
2. Set thermostat lever to desired temperature.
3. Set fan switch to "ON" for continuous indoor blower operation or to "AUTO" for indoor
blower to cycle corresponding with thermostat cycling.
Cooling Operation
1. Set thermostat system switch to "COOU'.
2. Set thermostat lever to desired temperature.
3. Set fan switch to "ON" for continuous indoor blower operation or to "AUTO" for indoor
blower to cycle corresponding with thermostat cycling,
Page 11 of 12
System Shutdown
1. For temporary or short periods of shut.down, set thermostat system to 'OFF" and fan switch to "AUTO".
2. For a prolonged period of shut-down, set thermostat system switch to "OFF" and fan switch to "AUTO". Tum off electdc power supply. (Two disconnect switches may supply unit.)
Page 41
Part No. 30790F089
Date, 6-1o89
Supersedes 30790G082
OPERATION INSTRUCTIONS
The following instructions are to be followed to obtain years of trouble free operation of your year-around comfort system.
To start unit turn on main power (may have two disconnect switches). If the outdoor temperature is below
indoor temperature, the main power should be turned on 24 hours before starting unit in order to assure no liquid refrigerant is in the compressor crankcase, and to prevent valve damage of compressor.
Operation of this unit is automatic and will provide heating or cooling depending on the setting of the thermostat.
Heating Operation
1. Set thermostat system switch to "HEAT".
2. Set thermostat lever to desired temperature.
3. Set fan switch to "ON" for continuous indoor blower operation or to "AUTO" for indoor
blower to cycle corresponding with thermostat cycling.
Cooling Operation
1. Set thermostat system switch to "(_OOU'.
2. Set thermostat lever to desired temperature.
3. Set fan switch to "ON" for continuous indoor blower operation or to "AUTO" for indoor
blower to cycle corresponding with thermostat cycling.
Page 11 of 12
System Shutdown
1. For temporary or short periods of shut-down, set thermostat system to 'OFF" and fan
switch to "AUTO".
2. For a prolonged period of shut-down, set thermostat system switch to "OFF" and fan switch to "AUTO". Turn off electric power supply. (Two disconnect switches may supply unit.)
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