DOMETIC 3317887.000 Rooftop Air Conditioner Instruction Manual

DOMETIC 3317887.000 Rooftop Air Conditioner

Product Information

Specifications

The Climate Control FreshJet 4 series is a rooftop air conditioner equipped with FreshJet return air grille and wall thermostat controls.

• Model: FreshJet 4 series
• Installation: Rooftop
• Controls: Wall thermostat

Product Usage Instructions

• Pre-installation
  Before installation, ensure you determine your cooling needs, prepare the thermostat opening, RV roof opening, and route the supply wiring to the roof opening. Position the rooftop component and prepare to work inside the RV.

• Installation
  Install and wire the thermostat and optional sensor, install the electronic control box, configure the electronic control box, and install the return air grille.

• System Check
  Reset the system if needed and perform a thorough check of the system to ensure proper functionality.

• Operation
  Follow the provided instructions for operating the rooftop air conditioner effectively.

• Maintenance
  Regularly clean the air filter, return air grille, and service the blower to maintain optimal performance.

• Troubleshooting
  Refer to the troubleshooting section in case of any issues with the rooftop air conditioner.

• Disposal
  Properly dispose of the product following the guidelines provided in the user manual.

FAQ

• Q: How often should I clean the air filter?
  A: It is recommended to clean the air filter regularly, ideally every 1-2 months depending on usage.

• Q: What should I do if the system is not cooling effectively?
  A: Check for any blockages in the air filter or return air grille. Ensure proper installation and contact customer support if issues persist.

CLIMATE CONTROL FRESHJET

• WARNING
• Cancer and Reproductive Harm www.P65Warnings.ca.gov
• Form No. 4445104235 3317887.000 2024-01-23

Rooftop air conditioner (FreshJet return air grille, wall thermostat controls)

Copyright
© 2024 Dometic Group. The visual appearance of the contents of this manual is protected by copyright and design law. The underlying technical design and the products contained herein may be protected by design, patent or be patent pending. The trademarks mentioned in this manual belong to Dometic Sweden AB. All rights are reserved.

Placing the rooftop component

Service center & dealer locations

• Visit: www.dometic.com
• Please read these instructions carefully and follow all instructions, guidelines, and warnings included in this product manual in order to ensure that you install, use, and maintain the product properly at all times. These instructions MUST stay with this product.
• By using the product, you hereby confirm that you have read all instructions, guidelines, and warnings carefully and that you understand and agree to abide by the terms and conditions as set forth herein. You agree to use this product only for the intended purpose and application and in accordance with the instructions, guidelines, and warnings as set forth in this product manual as well as in accordance with all applicable laws and regulations. A failure to read and follow the instructions and warnings set forth herein may result in an injury to yourself and others, damage to your product, or damage to other property in the vicinity. This product manual, including the instructions, guidelines, and warnings, and related documentation, may be subject to changes and updates. For up-to-date product information, please visit www.dometic.com.

Related documents

• Find the installation and operation manual on-line in French at http://qr.dometic.com/beIv4k
• Find the installation and operation manual on-line in Spanish at http://qr.dometic.com/beIv6E

Explanation of symbols and safety instructions

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

1. Recognize safety information
   This is the safety alert symbol. It is used to alert you to potential physical injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

2. Understand signal words
   A signal word will identify safety messages and property damage messages, and also will indicate the degree or level of hazard seriousness.

   • DANGER!
     Indicates a hazardous situation that, if not avoided, will result in death or serious injury.

   • WARNING
     Indicates a hazardous situation that, if not avoided, could result in death or serious injury.

   • CAUTION
     Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.

   • NOTICE: Used to address practices not related to physical injury.

   • Indicates additional information that is not related to physical injury.

3. Supplemental directives
   To reduce the risk of accidents and injuries, please observe the following directives before proceeding to install, operate, or service this product:

   • Read and follow all safety information and instructions.

   • Read and understand these instructions before installing, operating, or servicing this product.

   • The installation must comply with all applicable local or national codes, including the latest edition of the following standards:
     U.S.A.

   • ANSI/NFPA70, National Electrical Code (NEC)

   • ANSI/NFPA 1192, Recreational Vehicles Code

   • Canada

   • CSA C22.1, Parts l & ll, Canadian Electrical Code

   • CSA Z240 RV Series, Recreational Vehicles

4. General safety messages

   • WARNING: ELECTRICAL SHOCK, FIRE, AND/OR EXPLOSION HAZARD. Failure to obey the following warnings could result in death or serious injury:
   • Use only Dometic replacement parts and components that are specifically approved for use with the product.
   • Avoid improper installation, adjustment, alterations, service, or maintenance of the product. Installation, service, and maintenance must be done by a qualified service person only.
   • Do not modify this product in any way. Modification can be extremely hazardous.
   • Use care when diagnosing and/or adjusting components on a powered product.
   • This product is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the product by a person responsible for their safety.
   • Children should be supervised to ensure that they do not play with the product.

Intended use

• The FreshJet Rooftop Air Conditioner ( FreshJet Return Air Grille, Wall Thermostat Controls), hereinafter referred to as the “product” or “unit,” is designed and intended for installation on the roof of a Recreational Vehicle, hereinafter referred to as the “RV,” during or after the time it is manufactured. The product is comprised of three main components: the rooftop component,
  the internal return air grille, and the wall thermostat, hereinafter referred to as the “thermostat.” This product is only suitable for the intended purpose and application in accordance with these instructions.

• This manual provides information that is necessary for proper installation of the product. Poor installation and/or improper operating or maintenance will result in unsatisfactory performance and a possible failure. The manufacturer accepts no liability for any injury or damage to the product resulting from:

  • Incorrect assembly or connection, including excess voltage
  • Incorrect maintenance or use of spare parts other than original spare parts provided by the manufacturer
  • Alterations to the product without express permission from the manufacturer
  • Use for purposes other than those described in this manual

• Dometic reserves the right to change product appearance and product specifications.

General information

• This section provides general information about the unit and its components.
• The images used in this document are for reference purposes only. Components and component locations may vary according to specific product models. Measurements may vary ±0.38 in. (10 mm).

Tools and materials
Dometic recommends that the following tools and materials be used.

Recommended tools and materials

Framing wood| All-weather caulk
Knife/box cutter| Screwdrivers
Electrical connectors| 3/8 in. Torque wrench socket
Basic electrical connection Tools| Torque wrench

(22.2 in. lbs /2.5 N·m)

RJ-45 crimping tool|
Optional parts

Part name| Dometic part number
2-pin Molex Mini-Fit Jr. Receptacle| Not applicable

Model identification
The model identification labels are located as follows:

• The rooftop component and serial numbers are found on the identification label located on the bottom of the base pan. To view the identification label, remove the return air assembly.
•  The return air grille component model and serial numbers are found on the rating plate located on the ceiling template. To view the rating plate, look through the filter opening.
• Have this information ready before contacting Dometic for service.

Thermostat compatibility
This section identifies the thermostat displays compatible with this product.

Rooftop component dimensions
This section provides the external dimensions and clearance measurements of the rooftop component.

1. Rooftop components (FreshJet 4 series)
2. 14.4 in. (351 mm)
3. 29.6 in. (752 mm)
4. 27.6 in. (701 mm)
5. Front of unit
6. Roof opening
7. Center line of unit
8. Air flow clearance area (shaded)
9. 18.0 in. (457 mm) Clearance

Return air grille components
This section identifies the main return air grille components.

Return air grille components

1. Return air grille cover
2. Washer
3. Screw, stainless steel
4. Magnet
5. Screw, 4 x 16 mm
6. Mesh filter
7. Mounting bolt
8.  Washer, stainless steel
9. Ceiling template
10. LED light strip (if equipped)
11. Duct divider
12. Quick cool switch

Return air grille component dimensions
This section provides the internal dimensions of the return air grille component.

Dimension measurements

1. Front of unit
2. 0.8 in. (19 mm)
3. 17.0 in. (432 mm)
4. 17.0 in. (432 mm)
5. 17.0 in. (432 mm)
6. 17.0 in. (432 mm)
7. 1.3 in. (86 mm)
8. 1.5 in. (38 mm)
9. 1.8 in. (32 mm)
10. 1.5 in. (38 mm)
11. Roof opening

Placement requirements
This section describes factors to consider when placing the rooftop component and the thermostat.

1. Planning the rooftop location
   The rooftop component is specifically designed for installation on the roof of an RV. To determine where to place the rooftop component, consider these items.

   • A 14.3 in. x 14.3 in. (363 mm x 363 mm) [±0.1 in. (3 mm)] square opening and hereinafter referred to as “roof opening” is required. The roof opening is part of the return air system of the rooftop component and must be finished in accordance with NFPA 1192.
   • The rafter/joist support frames must be spaced no greater than 16.0 in. (406 mm) on center. The rooftop component is designed to fit over an existing roof vent opening.
   • The distance between the roof and the RV ceiling must be between 1.5 in. (38 mm) and 6.0 in. (152 mm).
   • When no roof vent is available or when another location is desired, an opening must be cut through the roof and ceiling of the RV. This opening must be located between the roof reinforcing members. Consider these recommendations along with your cooling needs:
   • For a single rooftop component: mount the rooftop component slightly forward of the RV’s center (front to back) and centered from side to side.
   • For two rooftop components: measuring from the front of the RV and centering from side to side, mount the first rooftop component at 1/3 the length of the RV and the second rooftop component at 2/3 the length of the RV.

2. Tilt requirements
   When measuring for placement, perform the following actions.

3. Make all measurements while the RV is parked on a level surface.

4. Install the rooftop component on a flat and level roof section.

5. Use the tilt allowance table to determine the maximum acceptable roof tilt.

Tilt allowance

Model number| Maximum tilt (all directions)
FreshJet 4 series| 15°

Planning the return air grille  location
The return air grille requires unobstructed airflow to operate properly. Make sure the installation location inside the RV is free of obstructions such as, door openings, room dividers, curtains, ceiling fixtures, etc.
Planning the thermostat location
The proper location of the thermostat is important to ensure the unit provides a comfortable RV temperature. To determine where to place the thermostat, consider these items:

• Locate the thermostat 54.0 in. (1.4 m) above the floor.
• Install the thermostat on a partition, not on an outside wall.
• Never expose the thermostat to direct heat from lamps, the 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.

For thermostats installed with an optional indoor temperature sensor in all zones, consider these additional items:

• The thermostat may be mounted anywhere in the RV that is convenient.
• Avoid hard to reach and hard to see areas.
• See the instructions provided with the indoor temperature sensor for installation details.

For multiple, single zone thermostats, consider these additional items:

• Install each individual thermostat in the room that the AC is responsible for cooling.
• This configuration will prevent the air conditioners from attempting to turn on at the same time and overloading the breaker.

Air distribution system sizing and design
NOTICE: Make sure ductwork will not bend or collapse during and after installation, and that it is correctly insulated and sealed. Otherwise, damage to the roof structure and ceiling could occur.
This section describes the sizing and design requirements; and, a recommended configuration for the air distribution ductwork.
Ductwork requirements

Return air grille kit

| FRESHJET, RAG- PLAIN PREM, WHT 9610003699
---|---
FRESHJET, RAG-PLAIN PREM, WHT, LED 9610003700
Roof cavity depth| 1.5 in. (38 mm) —

6.0 in. (152 mm)

Duct cross sectional area| 21.0 sq in. (53 cm) minimum
Duct depth| 1.5 in. (4 cm) —

2.5 in. (6 cm)

Duct width| 7.0 in. ( 18 cm) —

10.0 in. (25 cm)

Duct total (short run)| One-third total duct length
Duct length total| 15.0 ft ( 4.6 m) —

40.0 ft (12.2 m)

Number registers required| Four minimum
Supply register free air area| 14 sq in. (36 sq cm)
Return register free air area (including the filter)| 40 sq in. (102 sq cm) minimum
Distance from duct end| 5.0 in. (13 cm) —

8.0 in. (20 cm)

Distance from elbow| 15 in. (38 cm)
Total system static air pressure, blower at high speed, filter and grille in place| 0.5 — 1.1 in. WC

The following additional requirements must be met for the unit to operate properly:

Duct insulation

1. Duct
2. Roof opening
3. Ceiling
4. Roof
5. Insulation

• All ducts and their joints must be properly insulated (R-7 minimum) and sealed to prevent condensation from forming on their surfaces or adjacent surfaces during operation of the unit.
• Return air to the unit must be filtered to prevent dirt accumulation on the unit cooling surface.

Air distribution system configuration

1. Register
2. Front of RV
3. Return air
4. Air conditioner

Dometic Corporation recommends this basic configuration for installing the air distribution system. We have found by testing, that this configuration works best in most applications.

• If multiple air conditioners are being used, Dometic Corporation recommends the above configuration for each air conditioner zone.
• The installer of this system must design the air distribution system for their particular application after reviewing the RV floor plan to determine the following:
  • Duct size
  • Duct layout
  • Register Size
  • Register location
  • Thermostat location
  • Indoor temperature sensor location, if applicable.

Alternate configurations and methods may be used which will allow the unit to operate properly; however, these alternate configurations and methods must be approved by Dometic Corporation in writing.

Specifications

This section provides the electrical specifications by model.

FreshJet model| Nominal capacity cooling (BTU hr)| Electrical rating| Compressor amps| Fan motor amps (dual motors, high speed)| Refrigerant R-410A

(oz)

| Minimum wire size 1| AC circuit protection 2 **(installer supplied)| Minimum generator size 3**

(1 unit/

2 units)

---|---|---|---|---|---|---|---|---
Rated load (max)| Locked rotor (max)| Rated load| Locked rotor
FJX4373EHEWHASL| High Efficiency| 115 VAC,

60 HZ,

1 ph

| 9| 73| 2.2,

.87

| 3.0, 1.8| 13.4| 12 AWG| 15 Amp| 3.5 kW/

5.0 kW

---|---|---|---|---|---|---|---|---|---|---
FJX4373EHEBKASL
FJX4473EWHASL| 13,500| 115 VAC,

60 HZ,

1 ph

| 13| 73| 2.2,

.87

| 3.0, 1.8| 12.7| 12 AWG| 20 Amp| 3.5 kW/

5.0 kW

FJX4473EBKASL
FJX4573EWHASL| 15,000| 115 VAC,

60 HZ,

1 ph

| 13| 73| 2.2,

.87

| 3.0, 1.8| 13.4| 12 AWG| 20 Amp| 3.5 kW/

5.0 kW

FJX4573EBKASL
FJX4573EHPWHASL4
FJX4573EHPBKASL4

1. The wiring size indicated is for copper wiring up to 24 ft (7.3 m) in length. For wire lengths over 24 ft (7.3 m), consult the National Electrical Code for proper sizing.

2. Circuit protection: a time delay fuse or circuit breaker is required.

3. 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 RV must be considered. Generators may lose power at high altitudes and from lack of maintenance.

4. This model includes a heat pump.

Wiring diagram

This section provides the wiring diagram for the product.1

FreshJet 4 series

• Field wiring
• Factory wiring
• Line splice
• Wiring diagram definitions; 115 VAC; 60 Hz 1 PH; use copper conductors only

Pre-installation

WARNING : FIRE OR ELECTRICAL SHOCK HAZARD. Failure to obey these warnings could result in death or serious injury.

• Shut off the gas supply, disconnect the 115 VAC power from the RV, and disconnect the positive (+) 12 VDC terminal from the supply battery before drilling or cutting into the RV.
• Make sure there are no obstacles such as wires or pipes inside the RV’s roof.
• Provide grounding in compliance with all applicable electrical codes.
• CAUTION: LIFTING HAZARD.
• Use proper lifting technique and control when lifting the rooftop component. Two people are required to lift the rooftop component. to the roof. Failure to obey this caution could result in minor or moderate injury.
• NOTICE: Failure to follow these notices could result in damage to the rooftop component and/or the RV.
• Never create a low spot on the RV roof.
• Maintain the structural integrity of the RV roof. The roof must be designed to support 130 lbs (59 kg) when the RV is in motion. Normally, a 200 lb (91 kg) static load design will meet this requirement.
•  Read this entire section before beginning the installation.
• This section describes how to install and set up the unit.

Determining your cooling needs
When determining your cooling requirements, consider the following items:

• The size of the RV
• The RV window area (which could increase heat gain)
• The amount of insulation in the walls and the roof
• The geographical location where the RV will be used
• The personal comfort level required

Preparing the thermostat opening

1.  Confirm the gas supply is shut off, and the 115 VAC power from the RV and the positive (+) 12 VDC terminal from the supply battery are disconnected.
2. Consider the dimensions and placement for a new opening or modifying an existing opening. See “Placement requirements” on page 7.

Thermostat cutout dimensions

1. 4.4 in. (112 mm)
2. 2.6 in. (67 mm)
3. Create the opening for the thermostat.
4. Create a minimum 0.6 in. (16 mm) diameter hole in the opening as required for the thermostat wiring.

Preparing the RV roof opening
NOTICE: The roof opening must be structurally framed to provide adequate support and to prevent air from being drawn from the roof cavity. Framing stock with 0.75 in. (19 mm) or more thickness must be used.

• Remember to provide an entrance hole for power supplies at the front of the opening.
• This section describes how to prepare the RV roof opening.

Using an existing roof vent opening

• If the roof does not have an existing roof vent, go to
• “Making a new roof opening” on page 12.

This section describes how to prepare the RV roof when using an existing vent.

1. Shut off the gas supply, disconnect the 115 VAC power from the RV, and disconnect the positive (+) 12 VDC terminal from the supply battery.

2. Unscrew and remove the roof vent.

3. Remove the caulking compound around the opening.

4. Seal the screw holes and seams where the roof gasket will be located. Use a good grade of all-weather sealant.

5. Measure the roof opening (review “Placement requirements” on page 7). If the roof opening is within specifications, go to “Routing the supply wiring to the roof opening” on page 13.

6. If the opening needs to be resized, proceed to
   “Making a new roof opening” on page 12.

   • If the opening exceeds 14.4 x 14.4 in. (366 x 366 mm), it will be necessary to reduce the size of the opening.
   • If the opening is less than 14.1 x 14.1 in. (358 x 358 mm), it will be necessary to enlarge the opening.

Making a new roof opening
I If the roof has an existing roof vent, see “Using an existing roof vent opening” on page 12.
This section describes how to prepare the RV roof when making a new roof opening.

1. Shut off the gas supply, disconnect the 115 VAC power from the RV, and disconnect the positive (+) 12 VDC terminal from the supply battery.
2. Carefully mark the required roof opening. See
   “Placement requirements” on page 7.

Structure for a new roof opening

1. Incorrect
2. Correct
3. Correct

Make sure the new opening does not compromise the roof’s structural integrity.

• Do not cut the roof structure or the rafters.
• The rafters should remain supported by a cross beam.
•  The opening should be between the rafters.

Carefully cut the required roof opening.

Structural framing for a new roof opening

1. 0.8 in. (20 mm) Minimum width for the framing stock
2. 0.3 in. (8 mm) Minimum width for access hole
3. 15.0 in. (381 mm) Exposed length of 115 VAC power supply wire

Frame the opening so it will not collapse when bolting the rooftop component down.

• At the front of the frame opening, leave or create an access hole to allow for the length of exposed 115 VAC power supply wiring required to complete the installation.
• Using the roof opening as a guide, cut a matching hole in the ceiling of the RV interior.

Routing the supply wiring to the roof opening

• The power must be on an appropriately-sized separate time-delay fuse or circuit breaker. See “Specifications” on page 10.
• This section describes how to route the wiring for the rooftop component.

Routing the VAC power supply wire

1. Position the copper 115 VAC power supply wire, with ground, in the front portion of the roof opening.

2. Route the 115 VAC power supply wire from the time-delay fuse or circuit breaker box to the roof opening. Use a listed/certified non-metallic sheathed single strand cable. See “Specifications” on page 10.
   If an AC or a vent fan were removed, the existing power supply wire may be used provided it is of the proper type, size, and location, and if it is correctly fused.

3.  Make sure at least 15.0 in. (381 mm) of the 115 VAC power supply wire extends into the roof opening to ensure an easy connection at the junction box.

Routing the VDC power supply wire

1. Choose one of the following options to route the 18 to 22 AWG VDC power supply wire:
   • For an independent 12 VDC power supply, route the wire from the filtered side of the RV converter or from the battery to the roof opening.
   • For an RV-C 12 VDC power supply, route the wire from the vehicle RV-C bus to the front portion of the roof opening.
2. Make sure that at least 15.0 in. (381 mm) of the 12 VDC supply wire extends into the roof opening.

Routing the thermostat communication cable

1. Route an 8-conductor, RJ-45 communication cable from the roof opening to the thermostat mounting location.
   For RV-C bus communication, where a multiplexer will control the AC, route two 18 to 22 AWG conductors to the roof opening from the bus.

2. Make sure at least 15.0 in. (381 mm) of the cable extends into the roof opening and 6.0 in. (152 mm) extends from the wall at the thermostat mounting location. See “Preparing the thermostat opening” on page 11.

RV structure

1. Air conditioner
2. Thermostat
3. Furnace (optional)
4. Thermostat communication cable
5. Breaker box y 12 VDC input
6. Temperature sensor (optional)
7. Furnace wires

If you use more than one rooftop component to manage multiple zones with an INC2015RD thermostat, you must also complete the following actions:

• Route an additional 8-conductor, RJ-45 communication cable to the roof opening for each additional rooftop component.
  For RV-C bus communication, where a multiplexer will control multiple air conditioner devices: route two 18 to 22 AWG conductors from the bus to the roof opening of each AC.

• Make sure that at least 15.0 in. (381 mm) of the wire extends into the roof opening.

Protect all the wires where they pass into the opening, according to local and national standards.

Routing the furnace wire
If your system includes a gas furnace, you must complete the following steps:

1. Route two 18 AWG wires from the furnace to the roof opening of the rooftop component that will control the furnace.
2. If your system will use more than one furnace, route a second set of 18 AWG wires from the second furnace to the second rooftop component.

Routing the indoor temperature sensor wire (optional)
If your system includes an indoor temperature sensor, you must complete the following actions:

1. Route the optional indoor temperature sensor wire from the roof opening to the indoor temperature sensor location.
2. Route the 2-pin connector end of the wire to the roof opening.
3. Follow the indoor temperature sensor’s installation instructions for proper installation.

Routing the load shed wire (optional)
If you will use an Energy Management System (EMS), or load shed feature, with the thermostat, you must complete the following:

1. Route two EMS wires to the roof opening of the zone to manage.

2. Terminate each wire with a 2-pin Molex Mini-Fit Jr. receptacle.
   The signal normally required for this function is an open relay contact. When the EMS calls for the compressor to shut off, the relay contacts should close.

3.  Make sure that at least 15.0 in. (381 mm) of the EMS wire extends into the roof opening.

Routing an automatic generator start (AGS) feature via RV-C (optional)
If installing an AGS feature, you must complete one of the following actions:

• If the generator is equipped with RV-C communication capabilities and an AGS device:
  1. Ensure that the generator and AGS device are configured on the network.
  2. Set the values relevant to the AGS as prescribed by the RV-C specifications.
• If the generator is equipped with RV-C communication capabilities but not equipped with an AGS device:
  1. Install an RV-C compliant AGS interface device on the network.
  2. Set the values relevant to AGS as prescribed by the RV-C specifications.
• The generator can be configured on the RV-C network without an AGS.
  1. Install an RV-C interface device on the network.
  2.  Set the values relevant to GENERATOR_COMMAND.

Positioning the rooftop component
NOTICE: Do not slide the rooftop component along a surface or damage to the gasket on the bottom of the rooftop component could occur and cause a leak.

1. Remove all the contents from the carton and discard the carton.
2. Place all the return air grille kit contents in the RV. The return air grille kit contains mounting hardware for the return air grille that will be installed inside the RV.
3. Move the rooftop component to the roof.

Placing the rooftop component

1. Front of the rooftop component
2. Roof opening

Peel the adhesive backer off the gasket.
Lift and place the rooftop component over the prepared opening using the gasket on the rooftop component as a guide.
I The outside work is complete. Minor adjustments  can be made from inside the RV if required.

Preparing to work inside the RV
This section describes the interior preparation.

1. Confirm the return air grille kit is inside the RV. Centering the rooftop component from inside the RV
2. Roof gasket
3. From inside the RV, check the gasket alignment of the rooftop component over the roof opening. If necessary, adjust the rooftop component from below by gently pushing up.

13 Return air opening

1.  Wiring harness
2. Ceiling thickness
3.  Reach up into the return air opening of the rooftop component and pull down the rooftop component’s electrical cord and wiring harness.
4. If the rooftop component has a built-in board, complete the following:
5. Mount the junction box to the framing in front of the roof opening, using the installer-supplied screws.
6. Install the strain relief.

Installation

WARNING: FIRE OR ELECTRICAL SHOCK HAZARD. Failure to obey these warnings could result in death or serious injury.

• Shut off the gas supply, disconnect the 115 VAC power from the RV, and disconnect the positive (+) 12 VDC terminal from the supply battery before drilling or cutting into the RV.
• Provide grounding in compliance with all applicable electrical codes.

This section describes how to install and mount the wall thermostat and optional sensor.
Installing and wiring the thermostat and optional sensor
To install the wall thermostat, choose one of the following options based on the type of wiring.

• “Using independent RJ-45 wire to supply communication to the thermostat” on page 16, or
• “Using RV-C BUS and multiplexer to supply CAN communication to the AC” on page 17.

Using independent RJ-45 wire to supply communication to the thermostat
If installing non-RJ-45 wiring, go to “Using RV-C BUS and multiplexer to supply CAN communication to the AC” on page 17.

14 Connecting the RJ-45 plugs to the communication cable(s) q Pin 1

1. Terminate the previously run 8-conductor communication cable with two RJ-45 plugs using a crimping tool. Refer to the crimping tool manufacturer for instructions. See “Routing the thermostat communication cable” on page 13.
   The pins of both RJ-45 plugs must match: pin 1 must connect to pin 1 on the other connector, pin 2 must connect to pin 2 on the other connector, and continuing for all remaining pins. Pins 3 and 6 must be twisted at minimum rate of 25 twists per 39 in. (1 m). 15 Wiring to the thermostat

2. Insert the 8-conductor communication cable through the hole in the base plate. 16 RJ-45 connector
   RJ-45 cable connector

3. Insert the RJ-45 connector into the RJ-45 jack on the back of the thermostat.

4. Go to “Mounting the thermostat” on page 17 to install the thermostat onto the wall.

Using RV-C BUS and multiplexer to supply CAN communication to the AC
If installing RJ-45 wiring, go to “Using independent

1.  Cut back the outer cable shield 3.0 in. (76 mm) and    strip 0.3 in. (7.6 mm) of insulation from each wire.17 Connecting the thermostat communication cable plug to the thermostat terminal block

2. Thermostat   terminal block

3. Thermostat communication cable

4. Terminate the wires into a 4-pin Molex Mini-Fit Jr. receptacle using the correct pin assignments below:
   Connect Pin 1 to the (+) 12 V terminal.
   Connect Pin 2 to the GND terminal.
   Connect Pin 3 to the CAN_H (CAN Hi) terminal.
   Connect Pin 4 to the CAN_L (CAN Lo) terminal.

5. 3. Inspect all the connections to make sure they are tight and not touching any other terminals or wires.

Mounting the thermostat

1. Avoid pinching or bending the connected wiring cable(s) and tuck the cable(s) into the wall opening.
   18 Mounting the thermostat

2. Insert the top edge of the display into the cutout.
   Applying pressure over the Dometic logo, push the bottom edge of the display until the entire display is flush with the edges of the cutout. The display should fit tightly into the cutout.

3. To install the optional indoor temperature sensor, refer to the instructions provided with the indoor temperature sensor.

Installing the electronic control box
This section describes how to connect the power supply and low-voltage wiring to the electronic control box.
Connecting the 115 VAC power supply to the electronic control box

1. Route the previously run 115 VAC power supply wire from the rooftop component through the strain relief and into the junction box.
2.  Tighten the strain relief making sure not to damage the wires. Leave enough wire inside the junction box to connect to the rooftop component’s 115 VAC wires.
3. Connect the white neutral wires together, using appropriately-sized connectors.
4. Connect the black live wires to each other, using appropriately-sized connectors.
5.  Connect the bare copper wire to the green/yellow wire, using appropriately-sized connectors.
6. Ensure the connectors to the 115 VAC power supply wire are secured so they do not vibrate loose.

Connecting the low voltage wire to the electronic control box
NOTICE: Make sure the positive (+) 12 VDC terminal is disconnected from the supply battery. Otherwise, damage to the unit could occur.

1. If using independent RJ-45 wire:
2. Connect the previously run (+) 12 VDC supply wire protruding from the roof opening to the (+) 12 VDC red wire at the electronic control box.
3. Connect the previously run (–) 12 VDC supply wire protruding from the roof opening to the (–) 12 VDC black wire at the electronic control box.
4. If using the RV-C BUS and multiplexer, plug the 4-pin receptacle into the 4-pin plug labeled CAN-BUS on the electronic control box. See “Using RV-C BUS and multiplexer to supply CAN communication to the AC” on page 17.
5. Connect the previously run furnace thermostat wires protruding from the roof opening (if applicable) to the blue wires at the electronic control box. The polarity of these connections does not matter.
6. If you performed “Using independent RJ-45 wire to supply communication to the thermostat” on page 16, plug the RJ-45 cable into either RJ-45 jack on the electronic control box labeled as CAN/CMC. If more than one zone is used, the second jack is used to join each additional zone.
7. Plug the indoor temperature sensor cable (if applicable) into the 2-pin plug labeled ROOM SENSOR on the electronic control box.
8. If equipped with an Energy Management System, terminate the previously run Energy Management System wires with a 2-pin Molex Mini-Fit Jr. receptacle.
9. Plug the 2-pin Molex Mini-Fit Jr. receptacle into the 2- pin plug labeled as LOAD SHED on the electronic control box. The polarity of this connection does not matter.

Configuring the electronic control box
This section describes how to set the DIP switches for your unit’s electronic control box and to complete the system reset.
Locating the DIP switches 19 Electronic control box DIP switch location

1. DIP switch
2. Electronic control box

The electronic control box is located at the return air opening on the base of the AC and the DIP switches are visible through the opening.
The DIP switches are set to the Off position when shipped from the factory, except for heat pump models. Placing the switch in the On position selects that option.
Setting the DIP switches
This section describes the appropriate electronic control box DIP switch settings. The position should be set to the appropriate On or Off position based on the equipment options installed by the RV manufacturer.

1. On or closed switch position
2. Off or open switch position

If your RV has more than one electronic control box installed, configure each electronic control box with the appropriate DIP switch settings.
If necessary, press each switch On (Closed) or Off (Open) according to the following configuration table.

DIP switch setting configuration

DIP location| Description
1| Zone 2|

• Each thermostat can have up to four zones. If only one rooftop component is installed, it becomes zone 1 by default and DIP switch settings for zones 2, 3, or 4 are not required.
• If more than one rooftop component is installed, assign each rooftop component a separate zone (2 through 4). Each rooftop component must have a different zone setting.

2| Zone 3
3| Zone 4
4| Stage| For applications requiring two rooftop components to work together in the same zone, set the Stage DIP switch to the On position. Otherwise, leave in the Off position.
5| Furnace1| If a Furnace/hydronic heating system has been connected to this rooftop component, set the Furnace DIP switch to the On position, otherwise, leave in the Off position.
6| Gen Start1| To configure the Automatic Generator Start for a new installation, refer to “Routing an automatic generator start (AGS) feature via RV-C (optional)” on page 15. Leave this

DIP switch in the Off position, unless it is required for backwards compatibility using the CMC protocol.

7| Heat strip1| Leave this DIP switch in the Off position, unless it is required for backwards compatibility using the CMC protocol.
8| Heat pump2| For Heat Pump models, this DIP switch is set in the On position from the factory.

For non-Heat Pump models, change this DIP switch to the Off position.

9| Dehumidify1| The Dehumidify is not used on this rooftop component.

Leave this DIP switch in the Off position, unless it is required for backwards compatibility using CMC protocol.

10| 120 ohm CAN termination resistor 1,3| This DIP switch is in the On position from the factory to enable RV-C (CAN BUS) communication. Only the first and last devices on the CAN bus should enable the 120 ohm termination resistor.

1. Climate Module Communication (CMC) only
2. Current or CMC communication only
3. ON by default for RV-C

Installing the return air grille

This section describes how to install the duct divider, ceiling template, and return air grille cover.

1. Installing the duct divider
   Roof thicknesses vary among RVs and the return air grille installation may require cutting the duct divider to fit.
   This section describes how to determine if cutting the duct divider to fit is required, how many rows to remove, and the installation method.

1. Ceiling opening
2. Rooftop model unit basepan
3.  Roof thickness
4. Inspect the return air grille kit placed inside the RV at the beginning of “Preparing to work inside the RV” on page 15. See “Thermostat compatibility” on page 5 for the parts configuration.
5. Measure the roof thickness, from a flat surface of the installed rooftop component’s basepan to the ceiling opening inside the RV.
6. Using the table in “Number of rows to cut based on roof thickness” on page 20, determine the number of rows to cut off based on the roof thickness.

Number of rows to cut based on roof thickness

No . rows to cut

| Ceiling thickness
---|---
Min .| Max .
0| 6.0 in. (152 mm)| 6.5 in. (165 mm)
1| 5.5 in. (140 mm)| 6.0 in. (152 mm)
2| 5.0 in. (127 mm)| 5.5 in. (140 mm)
3| 4.5 in. (114 mm)| 5.0 in. (127 mm)
4| 4.0 in. (102 mm)| 4.5 in. (114 mm)
5| 3.5 in. (90 mm)| 4.0 in. (102 mm)
6| 3.0 in. (76 mm)| 3.5 in. (90 mm)
7| 2.5 in. (64 mm)| 3.0 in. (76 mm)
8| 2.0 in. (51 mm)| 2.5 in. (64 mm)
9| 1.5 in. (38 mm)| 2.0 in. (51 mm)

Cut off the indicated number of rows.

1. Ceiling template
2. Duct divider
3.  Bend here

• Place the ceiling template face down on a stable,  protected, flat surface.
• Bend the ends of the duct divider to match the plastic base (35 degree angle).
•  Press the duct divider into the molded channel on the top of the ceiling template.

Wiring the LED strip
If equipped, the LED light strip is already installed in the unit.
Connect the LED light strip wire into the port labeled Internal Light on the electronic control box.
Securing the ceiling template
NOTICE: Overtightening could damage the base pan or ceiling template. Not enough torque will cause an inadequate roof seal, and could cause a leak.

• All models in this manual use a four-bolt pattern to secure the return air grill assembly.
• This section describes how to secure the ceiling template to the roof.

1. Ceiling template

2.  Hold the ceiling template with the duct divider installed up to the roof opening. Position so the largest part of the duct divider faces the rear of the RV.

3. Use the following figures to determine the proper mounting pattern (A, B, C, D) and bolt location.

4. Ceiling template

5. Mounting bolts

6.  Start each mounting bolt by hand, through the ceiling template and up into the rooftop component base pan.

7.  Tighten all four mounting bolts evenly at 22.2 in. lbs (2.5 N·m).

The roof gasket will compress to approximately 0.8 in. (19 mm).

Installing the freeze control sensor
The freeze control sensor comes pre-installed from the factory.

Installing the return air cover

1. Return air cover
2. Ceiling template
3. Align the tabs on the mesh filter with the notches in the ceiling template and snap into place.
4. Place the return air cover on the ceiling template aligning so the cover snaps to the magnets.
5. Reconnect the 12 VDC and 120 VAC power supplies and turn on the power.
6. If necessary, reconnect the gas supply.

System check

This section describes how to reset and/or complete a final check of the system.

1. Resetting the system
   During a system initialization, the factory default settings are restored. All events are restored to the factory default settings. The Schedule events (if applicable) and the Timer (if applicable) are inactive. See the thermostat product manual for details.

When a DIP switch is turned On after the initial configuration, you must perform a system reset before the thermostat will recognize the updated selection.

1.  Be sure to complete the DIP switch setting configuration first in “Setting the DIP switches” on page 19.

2.  If the INC1015RD thermostat is installed, complete these actions to initialize the system:

3. Ensure the thermostat is Off.

4.  Simultaneously, press and hold the Mode and the (+) button for three seconds.
   The LED display will show ‘- -’ and the thermostat will transmit instructions to the controlled devices to return to their original factory default settings.

5. Release the Mode and the (+) button.

6.  To exit, press the On/Off button, which causes the thermostat to enter Low/Power mode.

7. Go to “Checking out the system” on page 22.

8. If the INC2015RD thermostat is installed, complete these actions to initialize the system:

9.  Ensure both the thermostat and the thin film transistor (TFT) display are Off.

10. Simultaneously, press and hold the Favorite and Confirm buttons. The TFT will show INIT and the zones that are available on the system.

11. Release the Favorite and Confirm buttons.

12. To exit, press the On/Off button.

13.  Continue to “Checking out the system” on page 22.

Checking out the system
See the thermostat operating instructions for  details.

1. Verify the system features function properly.
2.  Verify the operation of all applicable modes, including: Auto, Cool, Fan, and Heat.
3. If a feature does not work correctly:
   • Disconnect the 120 VAC and 12 VDC power supplies.
   • Verify all the wiring is correct and the correct DIP switches are set to the On position.
   • Perform a system reset.

Operation

See the thermostat operating instructions for your model to learn how to use the thermostat.

Maintenance

This section describes routine activities to maintain properly-working system components.

1. Cleaning the air filter
   NOTICE: Never run the unit without the return air filter in place. Otherwise, dirt will accumulate and may substantially degrade the performance of the unit over time.
   This section describes how to maintain a clean air filter.

2. Periodically (or at a minimum of every two weeks of operation) remove the return air filter located behind the return air vent grille and wash it with soap and warm water.

3. Let the return air filter dry completely before placing the return air filter back into position.

4. Cleaning the return air grille
   NOTICE: Never use furniture polish or scouring powders to clean the outside shell of the return air grille.
   Clean the outside shell of the return air grille with a soft cloth dampened with a water and mild detergent solution.

5. Servicing the blower
   The blower motor in the rooftop component is factory-lubricated and requires no service.

Troubleshooting

The following table describes common occurrences that are not a result of defective workmanship or materials.

Disposal

Place the packaging material in the appropriate recycling waste bins, whenever possible. Consult a local recycling center or specialist dealer for details about how to dispose of the product in accordance with all applicable national and local regulations.

LIMITED ONE-YEAR WARRANTY

• LIMITED ONE-YEAR WARRANTY AVAILABLE AT DOMETIC.COM/EN-US/TERMS-AND-CONDITIONS-CONSUMER/WARRANTY.
• IF YOU HAVE QUESTIONS, OR TO OBTAIN A COPY OF THE LIMITED WARRANTY FREE OF CHARGE, CONTACT:
• DOMETIC CORPORATION
• CUSTOMER SUPPORT CENTER
• 5155 VERDANT DRIVE
• ELKHART, INDIANA, USA 46516
• 1-800-544-4881 OPT 1
• dometic.com
• YOUR LOCAL DEALER
  • dometic.com/dealer
• YOUR LOCAL SUPPORT
  • dometic.com/contact
• YOUR LOCAL SALES OFFICE
  • dometic.com/sales-offices

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