Dometic 620515.326, 620525.326, 620515.421, 620525.321, 620525.421 Installation Instructions Manual

USA

C

S

SERVICE OFFICE
Dometic Corporation
509 South Poplar Street
LaGrange, IN 46761
260-463-4858

RECORD THIS INFORMATION

FOR FUTURE REFERENCE BEFORE

INSTALLING THE UNIT:

Model Number
Serial Number
Date Purchased
Place of Purchase

MODEL

620515, 620525, 620526

Roof Top Air Conditioner &

630515, 630516

Roof Top Heat Pump

USED WITH

3106615 Air Distribution Box Kit and

TM

3109228.001 Duo-Therm Comfort Control Center

This Unit Is Designed For OEM Installation. All Initial

Installations Must Be Approved By Dometic Corporation

CANADA

Dometic Distribution
866 Langs Drive
Cambridge, Ontario
CANADA N3H 2N7
[phone]

For Service Center
Assistance Call:

800-544-4881

INSTALLATION

INSTRUCTIONS

REVISION

Form No. 3109529.069 1/04
(Replaces 3109529.051)
(French 3109604.060)
©2004 Dometic Corporation
LaGrange, IN 46761

U

This manual must be read and un­derstood before installation, ad­justment, service, or maintenance
is performed. This unit must be in­stalled by a qualified service tech­nician. Modification of this product
can be extremely hazardous and
could result in personal injury or
property damage.

Important: These Instructions

must stay with unit.
Owner read carefully.

1

Lire et comprendre ce manuel avant de
procéder à l'installation, à des réglages,
de l'entretien ou des réparations.
L'installation de cet appareil doit être
effectuée par un réparateur qualifié.
Toute modification de cet appareil peut
être extrêmement dangereuse et
entraîner des blessures ou dommages
matériels.

MODELS

620515.321

620515.326

620515.421

620525.321

620525.326

620525.421

620526.321

620526.326

630515.321

630515.326

630515.421

630516.321

630516.326

620515, 620525, 620526, 630515 & 630516 Installation Instructions

SAFETY INSTRUCTIONS

This manual has safety information and instructions
to help users eliminate or reduce the risk of acci­dents and injuries.

RECOGNIZE SAFETY INFORMATION

!

This is the safety-alert symbol. When you see this
symbol in this manual, be alert to the potential for
personal injury .

Follow recommended precautions and safe oper­ating instructions.

UNDERSTAND SIGNAL WORDS

A signal word , WARNING OR CAUTION is used
with the safety-alert symbol. They give the level of
risk for potential injury .

WARNING

!

ous situation which, if not avoided, could result in
death or serious injury .

CAUTION

!

ous situation which, if not avoided may result in
minor or moderate injury .

CAUTION

symbol indicates, a potentially hazardous situa­tion which, if not avoided may result in property
damage.

Read and follow all safety information and instruc­tions.

indicates a potentially hazard-

indicates a potentially hazard-

used without the safety alert

GENERAL INFORMATION

A. Product features or specifications as described or illus-

trated are subject to change without notice.

B. This Air Conditioner Is Designed For:

1. Installation on a recreational vehicle during the time
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 recre­ational vehicle. Alternate installation methods will
allow forroofs more than 4.00 inches thick.

C. The ability of the air conditioner 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 air conditioner. During extremely
high outdoor 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

Operation on High Fan/Cooling mode will give optimum or
maximum efficiency in high humidity or high outside tem­peratures.

Starting the air conditioner early in the morning and giving it
a "head start" on the expected high outdoor ambient will
greatly improve its ability to maintain the desired indoor
temperature.

For a more permanent solution to high heat gain, accesso­ries like A&E outdoor patio and window awnings will reduce
heat gain by removing the direct sun. They also add a nice
area to enjoy company during the cool of the evening.

D. Condensation

Note: The manufacturer of this air conditioner 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 air conditioner re­moves this moisture from the air during normal operation.
Keeping doors and windows closed when this air conditioner
is in operation will minimize condensed moisture on cold
surfaces.

2

620515, 620525, 620526, 630515 & 630516 Installation Instructions

SPECIFICATIONS

620515.321 620526.321

620515.326 620526.326

620515.421 620525.321 630516.321 630515.321

MODEL NUMBER 620525.421 620525.326 630516.326 630515.421 630515.326

Nominal Capacity (BTU/HR) * 13,500 13,500 15,000 13,500 13,500
Electrical Rating 115 VAC, 60 Hz., 1 PH.
Compressor Rated Load Amps 11.5 12.4 12.0 12.0 12.4
Fan Motor Rated Load Amps 3.1 3.1 3.3 3.1 3.1
Compressor Locked Rotor Amps 50.0 60.0 64.0 50.0 60.0
Fan Motor Locked Rotor Amps 8.8 8.8 8.5 8.8 8.8
SCFM - High Speed Max./Min. 335/250 380/250 335/250
Refrigerant (R22) oz. 17 15.5 21.5 19.5 24.5
Minimum Wire Size ** 12 AWG Copper up to 24 ft.
AC Circuit Protection 20 Amp Time Delay Fuse or
(User Supplied) HACR Circuit Breaker
DC Circuit Protection Installation must comply with all National,
(User Supplied) State, Province and/or Local Electrical Codes
Installed Weight (Pounds) 102 102 104 102 102
Minimum Generator 1 UNIT 3.5 KW
Size *** 2 UNITS 5.0 KW

* Maximum unit performance achieved at full rated voltage.
** For lengths over 24 ft., consult the National Electrical Code.
*** Dometic Corporation gives general guidelines for generator requirements. These guidelines come from experiences people have

had in actual applications. When sizing the generator, the total power usage of your recreational vehicle must be considered. Also
keep in mind generators lose power at high altitudes and from lack of maintenance.

INSTALLATION INSTRUCTIONS

A. Precautions

Improper installation may damage equipment/
could endanger life, cause serious injury and/
or property damage.

1. Read Installation and Operating Instructions care­fully before attempting to start your air conditioner
installation.

2. Dometic Corporation will not be liable for any dam­ages or injury incurred due to failure in following
these instructions.

3. Installation must comply with the National Electrical
Code ANSI/NFPA-70 and CSA Standard C22.1
(latest edition and any State or Local Codes or
regulations.

4. DO NOT add any devices or accessories to this air
conditioner except those specifically authorized by
Dometic.

5. This equipment must be serviced by qualified per­sonnel and some states require these people to be
licensed.

B. Choosing Proper Location For The Air

Conditioner

This air conditioner 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.

1. Normal Location-The air conditioner is designed to
fit over an existing roof vent opening. When the vent
is removed, it normally creates a 14-1/4" X 14-1/4"

(±1/8") opening.

FIG. 1

Roof Vent
Opening

2. Other Locations-When no roof vent is available or
another location is desired, the following is recom­mended:
a. For one unit installation: The air conditioner

should be mounted slightly forward of center
(front to back) and centered from side to side.

3

620515, 620525, 620526, 630515 & 630516 Installation Instructions

b. For two unit installations: Install one Air Condi-

tioner 1/3 and one Air Conditioner 2/3’s from
front of RV and centered from side to side.

FIG. 2

1/2 L

L

2/3 L

L

1/3 L

It is preferred that the air conditioner be installed in a relatively
flat and level roof section measured with the RV parked on
a level surface.
Note: A 8° slant to either side, or front to back, is acceptable
for 620515, 620525, 620526, 630515 and 630516 series.

3. After Location Has Been Selected:
a. Check for obstructions in the area where air

conditioner will be installed. See FIG. 3 & 4.

b. The roof must be designed to support 130

poundswhen the RV is in motion. Normally a
200 lb. static load design will meet this require­ment.

FIG. 4

4-1/8”

(±1/8”) OPENING

KEEP THESE AREAS
FREE OF OBSTRUCTIONS

2 7/8

4

4"

7-1/8”

14-1/4" x 14-1/4”

7-1/8”

2 7/8

21-3/8”

Center Line
of Unit

4

4"

REAR
OF
UNIT

12"

+

-

1/8

CAUTION

It is the responsibility of the installer of this
air conditioner system to ensure structural
integrity of the RV roof. Never create a low
spot on the roof where water will collect. Wa­ter standing around the air conditioner may
leak into the interior causing damage to the
product and the RV.

c. Check inside the RV for air box obstructions

(i.e. door openings, room dividers, curtains,
ceiling fixtures, etc.) See FIG. 3 & 4.

FIG. 3

9-1/2"

9-1/2"

28-3/4"

28-3/4"

20"

39"

39"

2-1/2"

22"

C. Roof Preparation

1. Opening Requirements - Before preparing the ceil­ing opening, the type of system options must be
decided upon. If a remote sensor is to be used,
provision must be made for it. If the load shed option
is to be used, wires must be run from the load shed
control to the Dometic A/C. If a furnace is to be
connected, wires must be run from the furnace to the
Dometic A/C. Read all of the following instructions
before beginning the installation.
If a roof vent opening will not be used a 14-1/4" x 14­1/4" (±1/8") opening must be cut through the roof and
ceiling of the RV. This opening must be located
between the roof reinforcing members.

There may be electrical wiring between the
roof and the ceiling. Disconnect 115 volt AC
power cord and the positive (+) 12 volt DC ter­minal at the supply battery. Failure to follow
this instruction may create a shock hazard
causing death or severe personal injury.

4

The 14-1/4" x 14-1/4" (±1/8") opening is part of the
return air system of the Air Conditioner and must be
finished in accordance with NFPA Standard 501C
Section 2.7.2.

2. Roof Vent Removal
a. Unscrew and remove the roof vent.
b. Remove all caulking compound around open-

ing.

FIG. 5

c. Seal all screw holes and seams where the roof

gasket is located. Use a good grade of all
weather sealant.

d. If the opening exceeds 14-3/8" x 14-3/8", it will

be necessary to install spacers.

e. If the opening is less than 14-1/8" x 14-1/8", it

must be enlarged.

3. New Opening-(Installation Other Than Vent Open­ing)
a. Mark a 14-1/4" x 14-1/4" (±1/8") square on the

roof and carefully cut the opening.

b. Using the roof opening as a guide, cut the

matching hole in the ceiling.

d. The opening created must be framed to provide

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 supplies, fur­nace wiring, 4-conductor control cable, remote
sensor and load shed (Energy Management
System) options as desired.

FIG. 6

Do Not Cut Roof
Structure Or
Rafters

Leave Access for Power
Supply Wiring

Good-Rafters
Supported By
Cross Beams

3/4" Min.

Frame Opening So It
Won't Collapse When
Bolting Down

Good Location­Between Roof
Rafters

15" min.

620515, 620525, 620526, 630515 & 630516 Installation Instructions

CAUTION

It is the responsibility of the installer of this
air conditioner system to ensure structural
integrity of the RV roof. Never create a low
spot on the roof where water will collect. Wa­ter standing around the air conditioner may
leak into the interior causing damage to the
product and the RV.

D. Wiring Requirements

1. Route a copper 12 AWG, with ground, 115 VAC
supply line from the fuse or circuit breaker 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") opening.

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
easy connection at the junction box.

d. Wiring must comply with all National, State and

Local Wiring Codes.

e. Use a steel sleeve and a grommet or equivalent

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 or battery 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") opening.

b. Make sure that at least 15" of supply wire

extends into the roof opening.

c. In a multiple zone installation, this wiring

is required in only one of the 14-1/4" x 14­1/4" (±1/8") openings.

3. If a Remote Temperature Sensor is used, the
connector end must be routed 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 two
furnace thermostat leads must be routed to the roof
opening of the air conditioner 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 be
managed. The signal required for this function is
normally open relay contact. When the EMS calls
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.

5

6. Route a 4-conductor control cable from the Comfort

Insert Screwdriver
under Tab

Insert Screwdriver
under

Tab

M

ODE

MODE

FAN

UP

DOWN

OFFONOFF

ON

ZONE

TE

M

P

TEMP

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 mounting
position of the Comfort Control Center™. See
Section E-2.

7. In the event that other Air Conditioners are installed
(additional zones) an additional 4-conductor control
cable must be routed to the other Air Conditioners.
Make sure that at least 15" of the wire extends into
the roof opening. See FIG. 21.

8. If an automatic generator start kit (AGS) will be
installed, a 4-conducter control cable must be
routed from the last air conditioner to location of
AGS kit. Follow AGS kit instructions for installation.

E. Dometic Comfort Control Center™ & Cable

Installation

1. Location
a. If the system is to be used WITHOUT a Re-

mote Temperature Sensor, the proper loca­tion of the Comfort Control Center™ is very
important to ensure that it will provide a comfort­able RV temperature. Observe the following
rules when selecting a location:

• Locate the Comfort Control Center™ 54"

above the floor.

• Install the Comfort Control Center™ on a

partition, not on an outside wall.

• NEVER expose it to direct heat from lamps,

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 any-

where that is convenient in the coach. Try to
avoid hard to reach and hard to see areas.

• Refer to the instructions provided with the

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

A 4-conductor control cable must be routed from the 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 Com-

fort Control Center

6" of cable extending through the wall. See
Section D-6.

TM

location selected. Leave

b. The control cable that should be used is a flat,

4-conductor telephone cable.

620515, 620525, 620526, 630515 & 630516 Installation Instructions

c. The control cable must be terminated with two

(2) RJ-11 telephone connectors. Refer to the
crimp tool manufacture for crimping instruc-

tions.

Important: RJ-11 connectors must be installed as

shown in FIG. 7A & 7C.

FIG. 7A

FIG. 7B

FIG. 7C

3. Comfort Control Center
a. Carefully remove the base plate from the Com-

fort Control CenterTM. This may be accom-

plished by inserting a small screwdriver under
the tab on thebottom edge of the front cover
and gently prying. See FIG. 8.

FIG. 8

b. Insert the control cable through the hole in the

base plate and mount the plate to the wall with
two (2) screws provided. Check the alignment to
ensure level installation.

c. Install the control cable RJ-11 connector into

the back of the Comfort Control Center™ and
gently press onto the base plate.

6

Pin 1

RJ-11 Connector

Flat Four Conductor Cable

TM

Installation

620515, 620525, 620526, 630515 & 630516 Installation Instructions

T

E

R

F. Placing the Air Conditioner On The Roof

1. Remove the air conditioner from the carton and
discard carton.

2. Place the air conditioner on the roof.

FIG. 9

This unit weighs approximately 100 pounds.
To prevent back injury, use a mechanical hoist
to place Air Conditioner on roof.

3. Lift and place the unit over the prepared opening
using the gasket on the unit as a guide.

CAUTION

Do not slide the unit. This may damage the
neoprene gasket attached to the bottom and
may create a leaky installation.

FIG. 11

UPPER
DUCT

SIDE W ITHOU
TAB T O R EAR
OF A PPLIANC

LOWER
DUCT

c. Remove the upper duct from the ceiling tem-

plate and locate it over the blower discharge.
Note: The edge without the flange installs toward the rear of
the RV.

d. Use two (2) #10 x 3/8" screws to hold the duct

to the base pan. The holes are pre-punched in

the pan foreach location.

e. Check gasket alignment over roof opening and

adjust if necessary. Unit may be moved from
below by slightly lifting. See FIG. 12.

FIG. 12

Center Unit From Below

FIG. 10

FRONT

4. Place the Air Box Kit inside the RV. This box
contains mounting hardware for the air conditioner
and will be used inside the RV.

This completes the outside work. Minor adjustments

can be done from the inside of the RV if required.

G . Installing The Air Conditioner

1. Discharge Duct & Ceiling Template Installation.
a. Remove the air box and mounting hardware

from their carton. The upper duct is shipped
inside the lower duct which is part of the ceiling
template.

b. Locate the three 8" x 1/4" x 20 unit mounting

bolts, junction box cover and Romex connector
in the 3107180.006 bolt kit.

Roof
Gasket

f. Reach up into the return air opening and pull the

electrical cord down.

g. Mount the junction box to the ceiling in the

following location. See FIG. 13.

• Locate the junction box near ceiling tem-

plate. Locate opposite discharge duct end
and on same side as discharge duct. See
FIG. 14

• Center long side of junction box on center of

mounting bolt.

• Place edge of box approximately 1/2" from

edge of ceiling template.

• Attach junction box to ceiling of coach

using two(2) #10 x 1/2" screws provided.

7

620515, 620525, 620526, 630515 & 630516 Installation Instructions

CAUTION

CAUTION

FIG. 13

Gasket

Low Voltage Wires

Junction Box

h. Install the Romex connector in the junction box.

FIG. 14

Junction Box

Junction

Ceiling

Air Conditioner

Remote Sensor

Control Cables

Discharge Air

14-1/4" x 14-1/4" (±1/8")

j. Take the ceiling template and slide the lower

duct over the upper duct.

FIG. 16

k. Hold the ceiling template with one hand and with

the other, install the three 1/4" mounting bolts
through the template and into the base pan.

• Finger-tighten the (3) bolts and check align-

ment. There should be an equal opening on
each side and the rear flange must be tight
against the roof opening.

• EVENLY tighten the bolts to a torque of

40 to 50 inch pounds. This will com­press the roof gasket to approximately
1/2". The bolts are self locking so over

tightening is not necessary.

i Measure the ceiling thickness:

• If the distance is 2" to 3" remove the

perforated tabs from the bottom duct only.

• If the distance is 3" to 4" install ducts as

received.

• If the distance is 4" to 6" (maximum thick-

ness),optional Duct and Bolt Kits are avail­able:

Duct (Part No. 318556.000)
Bolts (Part No. 3100895.006)

FIG. 15

CENTER A/C
FROM BELOW

GASKET

MEASURE

CEILING

THICKNESS

If bolts are left loose there may not be an ad­equate roof seal or if over tightened, damage
may occur to the air conditioner base or ceil­ing template. Tighten to torque specifications
listed in this manual.

H. Wiring Of System

Reach up into the return air opening and pull the remaining
wires down. See FIG. 13.

1. Connection Of Low Voltage Wires

Disconnect the positive (+) 12 volt DC termi­nal at the supply battery. Damage to equip­ment could occur if the 12 volt DC is not shut
off.

a. Route Remote Temperature Sensor cable, if

applicable, and attach it to the connector that
matches its color protruding from the return air
opening.

8

C

620515, 620525, 620526, 630515 & 630516 Installation Instructions

b. Connect the previously run 12 VDC to the red

and black wires protruding from the return air
opening. (In multiple zone installations, this
needs to be doneat only one zone.) Connect
+12 VDC to the red wire; –12 VDC to the black
wire.

c. Connect the previously run furnace thermostat

wires (if applicable) to the blue wires protruding
from the return air opening. The polarity of these
connections does not matter.

d. Connect the previously run Energy Manage-

ment System wires (if applicable) to the yellow
wires protruding from the return air opening. The
polarity of these connections does not matter.

e. Terminate the 4-conductor control cable(s) pro-

truding into the 14-1/4" x 14-1/4" (±1/8") roof
opening. The cable(s) must be terminated with
a telephone RJ-11 connector. Refer to the crimp
tool manufacturer for crimping instructions.

Important: RJ-11 connectors must be installed as

shown in FIG. 7A & 7C.

f. Plug the control cable(s) into the telephone

jack(s) protruding from the return air opening. (It
does not matter which one.)

2. Connection Of 115 Volt Power Supply

FIG. 17

Junction Box

Junction
Box Cover

Ceiling
Template

Air Conditioner
Mounting bolts

Discharge Air
Duct

14-1/4" x 14-1/4" (±1/8")
Opening

I . Air Box Installation

1. Remove the two filter-grilles from the air box.

2. Slide the air box over the ceiling template.

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. These are only required where an uneven ceiling
does not allow proper fitting of the air box.

4. Install the filter-grilles by pushing them into place.
See FIG. 18.

FIG. 18

CEILING TEMPLATE

ELING TEMPLATE

AIR BOX

AIR BOX

Disconnect 1 15 volt AC. Failure to follow these
instructions could create a shock hazard
causing death or severe personal injury.

a. Route power supply line through Romex con-

nector and into junction box on side away from
the ceiling template. Tighten connector.

J. System Configuration, Reset & Check Out

This product is equipped with a 3-wire
(grounded) system for protection against
shock hazard. Make sure that the prduct is
wired into a properly grounded 115 volt AC
circuit and the polarity is correct. Failure to do
so could result in death, personal injury or
damage to the equipment.

b. Connect white to white; black to black; and

green to green or bare copper wire using appro­priate sized twist connectors.

c. Tape the twist wire connectors to the supply

wire to assure they don't vibrate off.
d. Push the wires into the box.
e. Install the cover onto the junction box.

Now that the system is installed, it is necessary to check all
operations and then configure the electronics. Refer to the
operating manual for a description of the air conditioner
operation.

1. Electronic Control Kit Configuration
Depending on the equipment options installed by the
recreational vehicle manufacturer, the appropriate dip

switches will need to be switched to the "ON" position.
See FIG. 19. Placing the switch in the "ON" position

selects that option.
Note: Dip switches are in the "OFF" position when shipped
from the factory except for models supplied with the heat strip
factory installed, (620515).For this model , the #1 dip switch
will be in the "ON" position. To gain access to the dip
switches, theshroud must be removed from the unit. Remove
the four mounting screws around the perimeter of the unit.
Next remove the electrical box cover. (The electrical box will
be on the curb side of the RV after installation).

9

FIG. 19

DIP
SWITCHES

a. Zone selection - when two or more units are

installed and controlled by one Comfort Con-

trol 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.

ON

12 345

HEAT STRIP

ZONE 2
ZONE 3

ZONE 4
FURNACE

678

DIFFERENTIAL
STAGE
GEN START

DIP
SWITCHES

620515, 620525, 620526, 630515 & 630516 Installation Instructions

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" position.
b. Simultaneously depress and hold the MODE

an d ZONE push-buttons while turning the ON/
OFF switch to "ON". FF should appear in LCD
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
We recommend that power be supplied to the air
conditioner and check for proper operation. Verify
that all features of the installed system work. See
Comfort Control Center™ Operating Instructions.
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 Board.

b. Heat strip selection - For units with a heat strip

installed at the factory (Model 620515), the #1
dip switch will be in the "ON" position. All other
models will have the dip switches in the "OFF"
position.

c. Furnace selection - when a furnace has been

connected to a zone, place the furnace dip
switch "ON" for that zone.

d. Differential - differential is the temperature differ-

ence between the "ON/OFF" cycle of the thermo­stat. The normal differential is preset in the
circuit board with the 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 Differential will not maintain your
comfort zone. If this occurs, the Differential can
be shortened by placing the Differential dip

switch to the "ON" position.
Note: Setting the Differential dip switch should only be
required when installation conditions are less than desirable
and is not covered under the limited warranty.

e. Stage selection - stage is not used on these

units. Leave in the "OFF" position.

f. Gen start selection - leave in the "OFF" position.
g. Replace the unit electrical box cover.
h. Replace the shroud.
i. Repeat this procedure for each additional zone.

10

REAR REMOTE SENSOR
(Required

with Second

Air

Conditioner)

14-1/4" x 14-1/4"
(±1/8”)

OPENING

14-1/4" x 14-1/4"
(±1/8”)

OPENING

OPTIONAL
FURNACE

FURNACE
2

WIRES

OPTIONAL FRONT
REMOTE

SENSOR

12V DC INPUT
2

WIRES

4-CONDUCTOR
CONTROL CABLE

BREAKER BOX

115V AC
REAR A/C

4-CONDUCTOR
CONTROL CABLE

115VAC
FRONTA/C

FURNACE

2

WIRES

DOMETIC COMFORT
CONTROL

CENTER

620515, 620525, 620526, 630515 & 630516 Installation Instructions

FIG. 20

Roof Mount Assembly

14-1/4" x 14-1/4" (±1/8")

Unit Mounting Bolts

Mounting Legs

Opening

Air Conditioner

Rear

Front

Upper Discharge Air Duct
Roof Line

Roof Reinforcement
Member
Framing, Return Air Duct

Lower Discharge Air Duct
(Attached to Ceiling Template)

Ceiling Template
Mounting Legs

Air Box

FIG. 21

DOMETIC COMFORT
CONTROL CENTER

FURNACE
2 WIRES

4-CONDUCTOR
CONTROL CABLE

BREAKER BOX

14-1/4" x 14-1/4"
(±1/8”) OPENING

4-CONDUCTOR
CONTROL CABLE

12V DC INPUT
2 WIRES

115V AC
REAR A/C

FURNACE

OPTIONAL FRONT
REMOTE SENSOR

REAR REMOTE SENSOR
(Required with Second
Air Conditioner)

14-1/4" x 14-1/4"
(±1/8”) OPENING

OPTIONAL
FURNACE

FURNACE
2 WIRES

115VAC
FRONTA/C

11

12V -

SOLAR OR

IF USED

DIRTY FILTER

12V +

60 Hz,

115 VAC

USE COPPER

RJ-11CABLE
TO COMFORT

LOAD SHED

LOAD SHED

RUN CAP

REVERSING VALVE

FIELD WIRING

SPLICE CAP

MOTOR

GRN/YEL

COMPRESSOR

O.L.

TO COMFORT

RJ-11 CABLE

LOAD SHED

IF USED

SOLAR OR

12V +

12V -

FIELD

WIRING

SPLICE

CAP

LOAD SHED

HEATER ELEMENT

USE COPPER

60 Hz,

115 VAC

ON SOME

RUN CAP

620515, 620525, 620526, 630515 & 630516 Installation Instructions

WIRING DIAGRAM FOR MODELS

620515.321, 620515.326, 620515.421, 620525.321,

620525.326, 620525.421, 620526.321 & 620526.326

PASSED

DIELECTRIC

P3

FIELD WIRING

BLK

F1

FACTORY WIRING

YEL

BLU

RED

K6

3 AMP

FUSE

YEL

COM

NO

SPLICE CAP

LOAD SHED

LOAD SHED

FURNACE
FURNACE

12V -

12V +

SOLAR OR

DIRTY FILTER

INDICATORS

IF USED

3106682.036

REMOTE
SENSOR

CABLE

WHITE

P4

BLU

BLK

BLK

A/C

POWER

MODULE

BOARD

FREEZE

CONTROL

WHITE

P5

T5

P6

T3

RJ-11 CABLE
TO COMFORT

CONTROL

BLK

BLK

P1

P2

BLK

K1

COM

NO

T1

T2

RED

YEL

BLK

BLK

BLK

MOTOR

WHT

GRN/YEL

WHT

GRN/YEL

WHT

BRN

WHT

WHT

LIMIT SWITCH

BLK

GRN/YEL

BLK

WHT

RUN CAP

FAN

C

HERM

WHT

HEATER ELEMENT

O.L.

R

RED

START CAP

BLK

COMPRESSOR

S

C

RED

PTCR

RED

NOT USED

ON SOME

MODELS

115 VAC

60 Hz,

1O

USE COPPER

CONDUCTORS
ONLY

WIRING DIAGRAM FOR MODELS

EARLY VERSION

630515.321, 630515.326

630515.421

630516.321, 630516.326

RJ-11CABLE

FIELD WIRING

LOAD SHED
LOAD SHED

FURNACE
FURNACE

12V ­12V +

3106613.023

FACTORYWIRING

SPLICE CAP

A/C
POWER
MODULE
BOARD

REMOTE
SENSOR

CABLE

WHITE

P3

P4

F1

3AMP
FUSE

YEL

YEL

BLU

BLU

BLK

RED

COM

K6

NO

BLK

BLK

TO COMFORT

CONTROL

BLK BLK

P2

P5

AMBIENT

SENSOR

T5

P6

K1

NO

T3

T2

P1

BLK

COM

T1

RED

YEL

BLK

BLK

MOTOR

WHT

GRN/YEL

WHT

BLK

GRN/YEL

BRN

WHT

WHT

BLK

RUN CAP

FAN

C

HERM

BLK

BLK

GRN/YEL

WHT

WHT

O.L.

R

S

C

RED

STARTCAP

REVERSING VALVE

COMPRESSOR

RED

PTCR

115 VAC
60 Hz,

USE COPPER
CONDUCTORS
ONLY

WIRING DIAGRAM FOR MODELS

LATER VERSION

630515.321, 630515.326

630516.321, 630516.326

PASSED

DIELECTRIC

A/C
POWER
MODULE
BOARD

RED

1o

LOAD SHED
LOAD SHED

FURNACE
FURNACE

SOLAR OR

DIRTY FILTER

INDICATORS

IF USED

12V ­12V +

REMOTE
SENSOR

CABLE

WHITE

P3

P4

F1

3 AMP
FUSE

YEL

YEL

BLU

BLU

BLK

RED

COM

K6

NO

BLK

BLK

FREEZE

CONTROL

WHITE

T5

RJ-11CABLE
TO COMFORT

CONTROL

RED

BLK

BLK

P1

P2

P5

AMBIENT
SENSOR

BLK

P6

K1

COM

NO

T1

T3

T2

MOTOR

YEL

BLK

BLK

WHT

BLK

GRN/YEL

WHT

BLK

12

GRN/YEL

BRN

WHT

WHT

BLK

REVERSING VALVE

RUN CAP

FAN

C

HERM

GRN/YEL

BLK

WHT

STARTCAP

O.L.

R

RED

COMPRESSOR

S

C

RED

PTCR

FIELD WIRING

FACTORYWIRING

SPLICE CAP

115 VAC
60 Hz,

USE COPPER
CONDUCTORS
ONLY

RED

1o

3106613.049