Dometic 641515.301 User manual

1
641515, 641516, 641535, 651515 & 651516 Installation Instructions
This manual must be read and
understood before installation,
adjustment, service, or mainte-
nance isperformed. Thisunit must
be installed by a qualified service
technician. Modification of this
product can be extremely hazard-
ous and could result in personal
injury or property damage.
INSTALLATION
INSTRUCTIONS
Important: These Instructions
must stay with unit.
Owner read carefully.
RECORD THIS UNIT INFORMATION FOR
FUTURE REFERENCE:
Model Number
Serial Number
Date Purchased
Lire et comprendre ce manuel avant
de procéder à l'installation, à des ré-
glages, de l'entretien ou des répara-
tions. L'installation de cet appareil doit
être effectuée par un réparateur quali-
fié. Toute modification de cet appareil
peut être extrêmement dangereuse et
entraîner des blessures ou dommages
matériels.
MODEL
641515, 641516, 641535
Roof Top Air Conditioners
651515, 651516
Roof-Top Heat Pump
used with
3106615 Air Distribution Box
3109228 Comfort Control CenterTM
MODELS
641515.301
641515.306
641516.301
641516.306
Form No. 3312127.000 10/08
(French 3312128.000)
©2008 Dometic, LLC
LaGrange, IN 46761
641516.331
641535.301
641535.306
651515.301
USA
SERVICE OFFICE
Dometic, LLC
2320 Industrial Parkway
Elkhart, IN 46516
574-294-2511
CANADA
Dometic, LLC
46 Zatonski, Unit 3
Brantford, ON N3T 5L8
CANADA
519-720-9578
For Service Center
Assistance Call:
800-544-4881
651515.306
651516.301
651516.306
651516.331
This Unit Is Designed For OEM Installation. All Initial
Installations Must Be Approved By Dometic, LLC

2
641515, 641516, 641535, 651515 & 651516 Installation Instructions
SAFETY INSTRUCTIONS
This manual has safety information and instruc-
tions to help users eliminate or reduce the risk
of accidents and injuries.
RECOGNIZE SAFETY INFORMATION
Thisis thesafety-alert symbol.When yousee this
symbol in this manual, be alert to the potential
for personal injury.
Follow recommended precautions and safe op-
erating instructions.
UNDERSTAND SIGNAL WORDS
Asignal word, WARNING OR CAUTION is used
with the safety-alert symbol. They give the level
of risk for potential injury.
indicatesapotentially hazard-
ous situation which, if not avoided, could result
in death or serious injury.
indicates a potentially hazard-
ous situation which, if not avoided may result in
minor or moderate injury.
used without the safety alert
symbol indicates, a potentially hazardous situa-
tion which, if not avoided may result in property
damage.
Read and follow all safety information and in-
structions.
A. Product features or specifications as described or il-
lustrated are subject to change without notice.
B. This"AirConditionr"/"HeatPump"(hereinafterreferred
to as the "unit") Is Designed For:
1. Installationonarecreationalvehicleduringthetime
the vehicle is manufactured.
2. Mounting on the roof of a recreational vehicle.
3. Roof construction with rafters/joists on minimum
of 16 inch centers.
4. Minimum of 2.00 inches and maximum of 4.00
inches distance between roof to ceiling of recre-
ational vehicle. Alternate installation methods will
allow for roofs more than 4.00 inches thick.
C. The ability of the unit to maintain the desired inside
temperature depends on the heat gain of the RV.
Some preventative measures taken by the occupants
of the RV can reduce the heat gain and improve the
performance of the unit. During extremely high out-
door temperatures, the heat gain of the vehicle may
be reduced by:
1. Parking the RV in a shaded area;
2. Using window shades (blinds and/or curtains);
3. Keeping windows and doors shut or minimizing
usage;
4. Avoiding the use of heat producing appliances.
5. Operation on High Fan/Cooling mode will give
optimum or maximum efficiency in high humidity
or high outside temperatures.
6. Starting the unit early in the morning and giving it
a "head start" on the expected high outdoor ambi-
ent will greatly improve its ability to maintain the
desired indoor temperature.
7. For a more permanent solution to high heat gain,
accessories like A&E outdoor patio and window
awningswillreduceheatgainbyremovingthedirect
sun. They also add a nice area to enjoy company
during the cool of the evening.
D. Condensation
Note:The manufacturer of this unit will not be responsible
for damage caused by condensed moisture on ceilings or
other surfaces. Air contains moisture and this moisture
tends to condense on cold surfaces. When air enters
the RV, condensed moisture may appear on the ceiling,
windows, metal parts, etc. The unit removes this moisture
from the air during normal operation. Keeping doors and
windows closed when this unit is in operation will minimize
condensed moisture on cold surfaces.
GENERAL INFORMATION

3
641515, 641516, 641535, 651515 & 651516 Installation Instructions
SPECIFICATIONS
Model
Number Nominal
Capacity
(BTU/HR)
Cooling
Electrical
Rating
Amps
Compressor
Rated
Load
Amps
Compressor
Locked
Rotor Amps
Fan
Motor Rated
Load
Amps
Fan
Motor Locked
Rotor Amps
Refrigerant
R-410A
(Oz.)
Minimum
Wire Size* AC Circuit
Protection
*** User
Supplied
Installed
Weight
(Pounds)
Minimum Generator
Size**
1 Unit/2 Units
641515.301 13,500 120VAC
60Hz.
1 Phase
12.5 61.0 3.5 10.0 17.5 12 AWG
Copper
Up To 24’
20 Amp 96 3.5 KW/5.0 KW
641515.306 13,500 12.5 61.0 3.5 10.0 17.5 20 Amp 97 3.5 KW/5.0 KW
6451516.301 High Capacity 12.3 61.0 3.3 8.5 23.0 20 Amp 105 3.5 KW/5.0 KW
6451516.306 High Capacity 12.3 61.0 3.3 8.5 23 20 Amp 106 3.5 KW/5.0 KW
6451516.331 15,000 13.2 66.0 3.3 8.5 22.5 20 Amp 105 3.5 KW/5.0 KW
641535.301 13,500 12.5 61.0 3.5 10.0 17.5 20 Amp 97 3.5 KW/5.0 KW
641535.306 13,500 12.5 61.0 3.5 10.0 17.5 20 Amp 98 3.5 KW/5.0 KW
651515.301 13,500 12.5 61.0 3.5 10.0 25.0 20 Amp 98 3.5 KW/5.0 KW
651515.306 13,500 12.5 61.0 3.5 10.0 25.0 20 Amp 99 3.5 KW/5.0 KW
651516.301 High Capacity 12.3 61.0 3.3 8.5 24.0 20 Amp 106 3.5 KW/5.0 KW
651516.306 High Capacity 12.3 61.0 3.3 8.5 24.0 20 Amp 107 3.5 KW/5.0 KW
651516.331 15,000 13.2 66.0 3.3 8.5 23.0 20 Amp 106 3.5 KW/5.0 KW
* For wire length over 24 ft., consult the National Electric Code for proper sizing.
** Dometic, LLC gives GENERAL guidelines for generator requirements. These guidelines come from experiences people have had in actual ap-
plications. When sizing the generator, the total power usage of your recreational vehicle must be considered. Keep in mind generators lose power
at high altitudes and from lack of maintenance.
*** CIRCUIT PROTECTION: Time Delay Fuse or HACR Circuit Breakers Required.
A. Precautions
Improper installationmay damageequipment,
could endanger life, cause serious injury and/
or property damage.
1. ReadInstallationandOperating Instructionscare-
fully before attempting to start your unit installa-
tion.
2. Dometic, LLC will not be liable for any damages
or injury incurred due to failure in following these
instructions.
3. Installation must comply with the National Electri-
calCodeANSI/NFPA-70andCSAStandardC22.1
(latest edition and any State or Local Codes or
regulations.
4. DONOTaddanydevicesoraccessoriestothisunit
except those specifically authorized by Dometic.
5. This equipment must be serviced by qualified
personnel and some states require these people
to be licensed.
INSTALLATION INSTRUCTIONS
B. Choosing Proper Location For The Unit
This unit is specifically designed for installation on the
roof of a recreational vehicle (RV). When determining
your cooling requirements, the following should be
considered:
• Size of RV;
• Window area (increases heat gain);
• Amount of insulation in walls and roof;
• Geographical location where the RV will be
used;
• Personal comfort level required.
• It is preferred that the unit be installed on a
relativelyflat and level roofsection measured
with the RV parked on a level surface.
Note: A 8° slant to either side, or front to back, is accept-
able for all units.
1. Foroneunitinstallation:Theunitshouldbemounted
slightly forward of center (front to back) and cen-
tered from side to side.
2. For two unit installations: Install one Unit 1/3 and
one Unit 2/3’s from front of RV and centered from
side to side.
3. After Location Has Been Selected:
a. Check for obstructions in the area where unit
will be installed. See FIG 1.
b. The roof must be designed to support 130
pounds when the RV is in motion. Normally a
200lb.staticloaddesignwillmeetthisrequire-
ment.
9-1/2"
40" 29"
FIG. 1
12" Keepthese areas Free
of Obstructions
Center Line
Of Unit
4"
4"
14-1/4" x 14-1/4"
(±1/8") Opening
Dimensions Are Nominal
Front

4
641515, 641516, 641535, 651515 & 651516 Installation Instructions
C. Roof Preparation
1. OpeningRequirements-Beforepreparingtheceil-
ing opening, the type of system options must be
decidedupon.Readallofthefollowinginstructions
before beginning the installation.
A 14-1/4" x 14-1/4" (±1/8") opening must be cut
through the roof and ceiling of the RV. This open-
ing must be located between the roof reinforcing
members.
The14-1/4"x 14-1/4"(±1/8") openingispart ofthe
return air system of the unit and must be finished
in accordance with NFPAStandard 501C Section
2.7.2.
2 New Opening
a. Marka14-1/4" x14-1/4"(±1/8") squareonthe
roof and carefully cut the opening.
b. Using the roof opening as a guide, cut the
matching hole in the ceiling.
c. Theopeningcreatedmustbeframedtoprovide
adequate support and prevent air from being
drawn from the roof cavity. Lumber 3/4" or
more in thickness must be used. Remember
to provide an entrance hole for power sup-
plies, furnace wiring, 4-conductior control
cable, remote sensor and load shed (Energy
ManagementSystem)optionsasdesired.See
FIG. 3.
FIG. 3
Do Not Cut
Roof Struc-
ture Or Raf-
Good-Rafters
Supported By
Cross Beams
Good Location-
Between Roof
Rafters
Frame Opening So It
Won't Collapse When
Bolting Down Unit
3/4" Min.
Leave Access For Power
Supply Wiring
15" Min. At
Front Of
Opening
There may be electrical wiring between the
roof and the ceiling. Disconnect 120 volt AC
power cord and the positive (+) 12 volt DC
terminal atthe supplybattery. Failure tofollow
this instruction may create a shock hazard
causing death or severe personal injury.
D. Wiring Requirements
1. 120 VAC Supply Line
Route a copper 12 AWG, with ground, 120 VAC
supplylinefromthetimedelayfuseorcircuitbreaker
box to the roof opening.
a. This supply line must be located in the front
portion of the 14-1/4" x 14-1/4" (±1/8") open-
ing.
b. The power MUST be on a separate 20 Amp
time delay fuse or HACR circuit breaker.
c. Make sure that at least 15" of supply wire
extends into the roof opening. This ensures
and easy connection at the junction box.
d. Wiring must comply with all National, State
and Local Wiring Codes.
e. Useasteelsleeveandagrommetorequivalent
methods to protect the wire where it passes
into the opening.
2. Route a dedicated 12 VDC supply line (18-22
AWG) from the RV's converter (filtered terminals)
or battery to the roof opening.
c. Check inside the RV for return air kit obstruc-
tions (i.e. door openings, room dividers, cur-
tains, ceiling fixtures, etc.) See FIG 2.
It is the responsibility of the installer of this
unit to ensure structural integrity of the RV
roof. Nevercreatea lowspot ontheroof where
water will collect. Water standing around the
unit mayleak intothe interiorcausing damage
to the product and the RV.
Front
FIG. 2
20"
3-7/8"
2-7/8"
11" 11"
Perimeter Of Air Box
14-1/4" x 14-1/4" (±1/8")
Opening
Center Line Of
Opening
3-7/8"
20"
2-1/2"
22"
Dimensions Are Nominal

5
641515, 641516, 641535, 651515 & 651516 Installation Instructions
a. This supply line must be located in the front
portion of the 14-1/4" x 14-1/4" (±1/8") open-
ing.
b. Make sure that at least 15" of supply wire
extends into the roof opening.
c. Inamultiplezoneinstallation,thiswiringis
requiredinonly oneofthe14-1/4"x 14-1/4"
(±1/8") openings.
3. If a Remote Temperature Sensor is used, the
connector end must be routed from the sensor
location to the roof opening of the system which
it will control. Make sure that at least 15" of the
sensor cable extends into the roof opening. Refer
to the Remote Sensor Instructions for details of
the installation.
4. If a furnace is to be controlled by the system, the
twofurnacethermostatleadsmustberoutedtothe
roof opening of the unit that will control it. Make
sure that at least 15" of the furnace thermostat
wires extend into the roof opening.
5. If an Energy Management System (load shed
feature) is to be used with the control, two wires
must be routed to the roof opening of the zone to
bemanaged.Thesignalrequiredforthisfunctionis
anormallyopenrelaycontact.WhentheEMScalls
for the compressor to shut off, the relay contacts
should close. Make sure at least 15" of the EMS
wires extend into the roof opening.
6. Route a 4-conductor control cable from the Com-
fort Control Center™ mounting position into the
14-1/4" x 14-1/4" (±1/8") roof opening. Make sure
that at least 15" of the wire extends into the roof
opening and 6" extend from the wall at the mount-
ingpositionoftheComfortControlCenter™.See
Section E-2.
7. Intheeventthatotherunitsareinstalled(additional
zones)anadditional4-conductorcontrolcablemust
beroutedtotheotherunits.Makesurethatatleast
15" of the wire extends into the roof opening. See
FIG. 18.
8. If an automatic generator start kit (AGS) will be in-
stalled,a4-conductorcontrolcablemustberouted
from the last unit (zone) to location of the control
box that will operate theAGS system. FollowAGS
kit instructions for installation.
E. DometicComfort ControlCenter™&Cable
Installation
1. Location
a. IfthesystemistobeusedWITHOUTaRemote
Temperature Sensor, the proper location of
the Comfort Control Center™ is very impor-
tanttoensure thatitwill provideacomfortable
RV temperature. Observe the following rules
when selecting a location:
•LocatetheComfortControlCenter™54"
above the floor.
•Install the Comfort Control Center™ on
a partition, not on an outside wall.
•NEVERexposeittodirectheatfromlamps,
sun or other heat producing items.
•Avoid locations close to doors that lead
outside, windows or adjoining outside
walls.
•Avoid locations close to supply registers
and the air from them.
b. If the system is to be used WITH a Remote
Temperature Sensor in ALL zones, the
Comfort Control CenterTM may be mounted
anywherethatisconvenientinthecoach.Tryto
avoid hard to reach and hard to see areas.
•Refer to the instructionsprovidedwiththe
Remote Temperature Sensor for details
of installation.
c. A 3/8" diameter hole will be needed to route
the cable through the wall. See Section D-3.
2. Control Cable Installation
A4-conductorcontrolcablemustberoutedfromthe
roof opening to the Comfort Control CenterTM.
a. Choose the shortest, most direct route from
the 14-1/4" x 14-1/4" (±1/8") opening to the
Comfort Control CenterTM location selected.
Leave 6" of cable extending through the wall.
See Section D-6.
b. The control cable that should be used is a flat,
4-conductor telephone cable.
c. Thecontrol cablemustbeterminatedwithtwo
(2) RJ-11-6C4P telephone connectors. Refer
to the crimp tool manufacture for crimping
instructions.
Important:RJ-11-6C4Pconnectorsmustbeinstalled
as shown in FIG. 4, 5 & 6.
FIG. 4
FIG. 5
Flat Four Conductor Cable
RJ-11-6C4P Connector
Pin 1
FIG. 6
Black
Green
Red
Yellow
Black
Green
Red
Yellow

6
641515, 641516, 641535, 651515 & 651516 Installation Instructions
FIG. 7
b. Insertthecontrolcable through the holeinthe
baseplate andmounttheplatetothewall with
two(2)screws provided. Checkthealignment
to ensure level installation.
c. InstallthecontrolcableRJ-11-6C4Pconnector
intothebackoftheComfortControlCenter™
and snap onto the base plate. See FIG. 7.
F. Placing Unit On The Roof
This unit weighs approximately 100 pounds.
Topreventbackinjury,useamechanicalhoist
to place unit on roof.
FIG. 8
FRONT
1. Remove the unit from the carton.
2. Place the unit on the roof.
3. Lift and place the unit over the prepared opening
using the gasket on the unit as a guide. See FIG.
8.
4. Place the 3106615 Air Distribution Box Kit and
3109228 Comfort Control CenterTM inside the
RV. This box contains mounting hardware for the
unit and will be used inside the RV.
This completes the outside work. Minor adjust-
ments can be done from the inside of the RV if
required.
G. Installing The Unit
1. Remove air box and mounting hardware from
carton. Theupper ductisshippedinsidethelower
duct which is part of the ceiling template.
2. Remove upper duct from ceiling template and
locate it over blower discharge. See FIG. 9.
Note: Edge without flange installs toward REAR of open-
ing.
3. Usetwo(2)sharppointed #10sheet metalscrews
toholdducttobasepan. Screwholesareprovided
in bottom of base pan for these screws.
4. Check for correct alignment and adjust the unit
as necessary (Roof Gasket centers over 14-1/4"
x 14-1/4" (±1/8") opening).
5. Reachupintoreturnairopeningoftheunitandpull
the unit electrical cord down for later connection.
6. Measure the ceiling to roof thickness:
a. If distance is 2"-3", remove perforated tabs
from bottom duct only. See FIG. 10.
Do not slide the unit. This may damage the
roof gasket attached to the bottom and may
create a leaky installation.
Rear Of Unit
Upper Discharge
Air Duct Edge Without
Flange To
Rear Of Unit
FIG. 9
3. Comfort Control CenterTM Installation
a. Carefully remove the base plate from the
Comfort Control CenterTM. This may be
accomplished by inserting a small screw-
driver under the tab on the bottom edge of
the front cover and gently prying. See FIG.
7.

7
641515, 641516, 641535, 651515 & 651516 Installation Instructions
b. If distance is 3"-4", install ducts as received.
See FIG. 10.
c. If distance is 4"-6", use optional 318556.000
Duct Adaptor and 3100895.006 Bolt Kit.
7. Install ceiling template by sliding lower duct over
upper duct. See FIG. 11.
8. Hold the ceiling template with one hand and with
the other, install the three (8" x 1/4-20) mount-
ing bolts through the template and into the base
pan.
a. Finger-tighten the bolts and check alignment.
There should be an equal opening on each
side and the rear flange must be tight against
the roof opening.
b. EVENLY tighten the three bolts to a torque
of40to50inchpounds.Thiswillcompress
the roof gasket to approximately 1/2". The
bolts are self locking so over tightening is
not necessary.
H. Wiring The System
Reach up into the return air opening and pull the re-
maining wires down.
1. Connection Of Low Voltage Wires
Hold Ceiling Template With
One Hand And Install 3
Mounting Bolts Finger Tight
FIG. 11 Slide Lower Air
Discharge Duct
Over Upper Duct
Roof Gas-
ket
Unit Return Air
Opening
If bolts are left loose there may not be an ad-
equate roof seal or if over tightened, damage
may occurto the unitbase orceiling template.
Tighten to torque specifications listed in this
manual.
a. RouteRemoteTemperature Sensorcable,if
applicable, and attach it to the connector that
matches its color in the control box.
b. Connect the previously run 12 VDC to the red
andblackwiresprotrudingfromthecontrolbox.
(Inmultiplezoneinstallations,thisneedstobe
done at only one zone.) Connect +12 VDC to
the red wire; –12 VDC to the black wire.
c. Connectthepreviouslyrunfurnacethermostat
wires (if applicable) to the blue wires protrud-
ing from the control box. The polarity of these
connections does not matter.
d. Connect the previously run Energy Manage-
mentSystemwires(ifapplicable)totheyellow
wires protruding from the control box. The po-
larity of these connections does not matter.
e. Terminate the 4-conductor control cable(s)
protruding into the 14-1/4" x 14-1/4" (±1/8")
roofopening.Thecable(s)mustbeterminated
withatelephoneRJ-11-6C4Pconnector.Refer
to the crimp tool manufacturer for crimping
instructions.
Important:RJ-11-6C4Pconnectorsmustbeinstalled
as shown in FIG. 4, 5 & 6.
f. Plug the control cable(s) into the telephone
jack(s) on the control box. (It does not matter
which one.)
g. Locate the ambient sensor plug coming from
the unit, and attach it to the connector that
matchesitscoloroncircuitboardinthecontrol
box.
2. Connection Of 120 Volt Power Supply
Disconnect 120 volt AC. Failure to follow
these instructions could create a shock haz-
ard causing death or severe personal injury.
Disconnect thepositive (+)12 voltDC terminal
at the supply battery. Damage to equipment
could occur if the 12 volt DC is not shut off.
FIG. 10
Step a
Remove At
Perforation
Step b
Use As
Packaged
Upper Discharge
Air Duct
Lower Discharge
Air Duct

8
641515, 641516, 641535, 651515 & 651516 Installation Instructions
Note:Dipswitchesareinthe"OFF"positionwhenshipped
from the factory. The dip switches are visible on the circuit
boardintheunit’supperelectroniccontrolbox.Dipswitches
canbeeitherarockerorslidingstyleofaswitch.SeeFIGS.
13, 14, 15 & 16.
1. Electronic Control Kit Configuration
Depending on the equipment options installed
by the recreational vehicle manufacturer, the ap-
propriate dip switches will need to be switched to
the "ON" position. Placing the switch in the "ON"
position selects that option. See FIGS. 13, 14, 15
& 16.
Grill
FIG. 12 Ceiling Template Air Box
Filter
FIG. 13 Dip Switches
FIG. 16
Not Correct
Use Flat Blade Screw-
driver Wider Than Dip
Switch Slot To Move Dip
Switch
DO NOT USE
BALL POINT
PEN To Move
Dip Switch
Correct
FIG. 14 FIG. 15
All Switches
"OFF" All Switches
"OFF"
This product is equipped with a 3-wire
(grounded) system for protection against
shock hazard. Make sure that the appliance
is wired into a properly grounded 120 voltAC
circuit and the polarity is correct. Failure to
do so could result in death, personal injury
or damage to the equipment.
a. Route power supply line through Romex con-
nectorandintojunctionboxonsideawayfrom
theceilingtemplate.Tightenconnectormaking
sure not to pinch or short wiring..
b. Connect white to white; black to black; and
green to green or bare copper wire using
"listed" connectors.
c. Push the wires into the box.
d. Install the cover onto the junction box.
Note: Prior to installing the cover on the junction box see
Section J. System Configuration, Reset & Check Out.
e. Install the cover onto the junction box.
I. Air Box Installation
1. Remove the two filter-grilles from the air box.
2. Place the air box onto the ceiling template and
align the 4 screw holes.
3. Install the four (4) sharp pointed screws through
the air box legs and into the pre-punched holes in
ceiling template.
Note: There are four optional mounting holes on the outer
edge of the return air opening for which no screws are
provided.Theseareonlyrequiredwhereanunevenceiling
does not allow proper fitting of the air box.
4. Install the filter-grilles by pushing them into place.
See FIG. 12.
J. System Configuration, Reset & Check
Out
Now that the system is installed, it is necessary to
configure the electronics and check all operations.
Refer to the Operating manual for a description of the
unit operation.

9
641515, 641516, 641535, 651515 & 651516 Installation Instructions
Important: Dip switch damage will occur if they are
notsetintheproper manner.Aball pointpenorsimilar
object that will slip in the switch slot, can damage the
switch causing loss of connection. Use only a small
flat blade screw driver (wider than the dip switch slot)
to move the dip switch. See FIG. 16.
a. Zoneselection:whentwoormoreunitsare in-
stalledandcontrolledbyoneComfortControl
CenterTM, the second unit becomes Zone 2,
the third unit Zone 3 and the fourth unit Zone
4. The appropriate zone dip switch must be
set in each electronic control kit for Zone 2, 3
and 4.
b. Heatstripselection:Unitswithaheatstrip,the
#1 dip switch will be in the "ON" position.
c. Furnace selection - when a furnace has been
connected to a zone, place the furnace dip
switch "ON" for that zone.
e. Differential - differential is the temperature
differencebetween the "ON/OFF" cycleofthe
thermostat in the furnace mode. The normal
differentialispresetinthecircuitboardwiththe
dip switch set to the "OFF" position. In some
situations, it may be necessary to decrease
the differential.The location of the thermostat
may create a condition where the normal dif-
ferentialwillnotmaintainyour comfortzone.If
thisoccurs,thedifferentialcanbeshortenedby
placing the differential dip switch to the "ON"
position.
Note: Setting the differential dip switch should only be re-
quired when installation conditions are less than desirable
and is not covered under the limited warranty.
f. Stage selection - stage is not used on these
units. Leave in the "OFF" position.
g. Gen start selection - leave in the "OFF" posi-
tion.
h. Replace the unit electrical box cover.
i. Repeat this procedure for each additional
zone.
2. System Reset
After setting the dip switches in the electronic
control kit, do a system reset.
a. Turn the ON/OFF switch to the "OFF" posi-
tion.
b. Simultaneously depress and hold the MODE
andZONEpush-buttonswhileturningtheON/
OFFswitchto "ON".FFshould appear inLCD
display until the mode and zone push-buttons
are released.
c. When a dip switch is turned on after initial
configuration, a system reset will need to be
done before the Comfort Control Center™
will recognize the updated selection.
3. System Checkout
Verifythatallfeaturesoftheinstalledsystemwork.
Check fan speeds, cooling mode, heat pump
mode, furnace (if connected) and heat strip. If the
features do not work, check all wiring and confirm
that the correct options have been selected on
the Electronic Control Box. See Comfort Control
Center™ Operating Instructions.
FIG. 17 Roof Mounted Assembly
Unit Rear
Upper Discharge
Duct
Roof Opening
Ceiling Template
Mounting Bolts
Air Box

10
641515, 641516, 641535, 651515 & 651516 Installation Instructions
FIG. 18
641515, 641516 & 641535 WIRING DIAGRAM

11
641515, 641516, 641535, 651515 & 651516 Installation Instructions
AIR BOX WIRING DIAGRAM
651515 & 651516 WIRING DIAGRAM