DOMETIC Air Conditioning Roof Unit CoolAir RT780 Instruction Manual

AIR CONDITIONERS
COOLAIR RT780, SP950T

CoolAir RT780, SP950T
Please read this instruction manual carefully before installation and first use, and store it in a safe place. If you pass on the product to another person, hand over this instruction manual along with it.

Explanation of symbols

WARNING!
Safety instruction: Failure to observe this instruction can cause fatal or serious injury.
CAUTION!
Safety instruction: Failure to observe this instruction can lead to injury.
NOTICE!
Failure to observe this instruction can cause material damage and impair the function of the product.
NOTE
Supplementary information for operating the product.

Safety instructions

The manufacturer accepts no liability for damage in the following cases:

• Faulty assembly or connection
• Damage to the product resulting from mechanical influences and excess voltage
• Alterations to the product without express permission from the manufacturer
• Use for purposes other than those described in the operating manual

2.1 Using the device

• The freedom of movement of semi-trailers (of the outer edges of the semitrailer when turning or jackknifing) and other vehicle attachments must not be restricted.

• Only use the air conditioning roof unit for the purpose specified by the manufacturer and do not make any alterations or structural changes to the device.

• Do not use the air conditioning roof unit if it is visibly damaged.

• The air conditioning roof unit must be installed safely so that it cannot tip over or fall down.

• Installation, maintenance, and repair work may only be carried out by qualified personnel from a specialist company who are familiar with the risks involved and the relevant regulations.

• Do not use the air conditioning roof unit near flammable fluids and gases.

• Do not operate the air conditioning roof unit if the ambient temperature is below 0 °C.

• Do not undo the upper cover of the air conditioning roof unit in the event of a fire. Use approved extinguishing agents instead. Do not use water to extinguish fires.

• Please inform your vehicle manufacturer if the height entered in your vehicle documents needs to be altered due to the installation of the air conditioning
  roof unit:
  • RT780 height: 166 – 188 mm
  • SP950 height: 60 mm

• Disconnect all power supply lines when working on the air conditioning roof unit (cleaning, maintenance, etc).

2.2 Handling electrical cables

• Use cable ducts to lay cables through walls with sharp edges.
• Do not lay loose or bent cables next to electrically conductive materials (metal).
• Do not pull on the cables.
• Attach and lay the cables in such a manner that they cannot be tripped over or damaged.
• The electrical power supply may only be connected by a specialist workshop.
• Fit a fuse of 25 amps to the connection to the vehicle’s power supply.
• Never lay power supply lines (battery leads) in the vicinity of signal or control cables.

Target group

This installation manual contains the essential information and instructions for installing the parking cooler. It is intended for competent installer technical staff who are familiar with the guidelines and safety precautions to be applied when installing lorry accessories.
This installation manual should always be kept with the unit to which it relates.

Intended use

NOTICE!

• The device is not suitable for installation in construction machines, agricultural machines, or similar equipment. They will not work properly if exposed to strong vibrations.
• Operating the device with voltages other than those specified can result in damage to the device.

NOTE
The device is only designed for ambient temperatures of up to 43 °C.
4.1 RT780
The installation kit enables the installation of an air conditioning roof unit CoolAir RT780 in a roof ventilation opening (hatch) provided at the plant in an HGV driver cab.
4.2 SP950
The installation kit enables the installation of a CoolAir SP950T roof evaporator unit in a roof ventilation opening (hatch) provided at the plant in an HGV driver cab.
The CoolAir SP950T roof evaporator unit can only be operated in combination with a CoolAir SP950C condenser unit. Both components together form the CoolAir SP950 parking cooler.

Scope of delivery

5.1 RT780
CoolAir RT780 installation kit for
universal installation with perforation system attachment

5.2 SP950
CoolAir SP950T installation kit for
universal installation with perforation system attachment

Accessories

Available as accessories (not included in the scope of delivery):

Installation

CAUTION!
Improper installation of the air conditioning roof unit can result in irreparable damage to the device and put the safety of the user at risk.
The manufacturer will not be held liable for claims if the air conditioning roof unit is not installed according to this installation manual. That applies to malfunctions and the safety of the air conditioning roof unit, in particular to injuries and damage to property.
NOTICE!

• The air conditioning roof unit may only be installed by qualified personnel from a specialist company. The following information is intended for technicians who are  familiar with the guidelines and safety precautions to be applied.
• The manufacturer only assumes liability for parts included in the scope of delivery. The validity of the warranty expires if the device is installed together with third-party parts.
• Check whether the roof of the vehicle is able to support the weight of a person before climbing onto it. Ask the vehicle manufacturer about the permitted roof loads.

7.1 Notes on installation
The following tips and instructions must be observed wile installing the air conditioning roof unit:
WARNING!
Make sure that all electrical components are electrically discharged before carrying out work on them.
Before installing the parking cooler, disconnect all connections to the vehicle battery.

• Before installing the parking cooler, check whether any vehicle components could be damaged or have their function impaired as a result of the installa- tion.
  Check the dimensions of the system to be installed (fig. 2 ).
  The dotted line indicates the middle of the roof hatch opening.

• Before installation, find out (by consulting the manufacturer of the vehicle) whether the construction is designed for the static weight and the loads of the parking cooler when the vehicle is in motion. The manufacturer of the air conditioning roof unit assumes no liability whatsoever.

• The roof inclination of the mounting surface may not exceed 8° in the direction of travel.

• The supplied assembly parts must not be modified during installation.

• The ventilation slots (grill) may not be covered (minimum distance from other attachment parts: 10 cm).

• You can connect the unit to the battery via the lorry’s terminal block or directly. The terminal block is to be preferred for the connection. On some vehicles, larger consumers connected to the terminal block are switched off after a short while if the power requirement is too high. Ask your vehicle manufacturer for the specifications of the terminal block.

• When installing the system and making the electrical connections, observe the guidelines from the body manufacturer.

• Pay attention to the connection plan for the device:
  RT780

SP950

NOTE
After installing the unit, the specified parameters of the unit software must be checked (chapter “Configuration of unit software” on page 15).
7.2 Removing the sunroof
Proceed as follows (fig. 6 ):

• Remove all screws and fixtures of the existing sunroof.
• Take out the sunroof.
• Remove the sealant around the opening, so that the surface is clean and free of grease.

NOTE
Dispose of all waste material, glue, silicone and seals separately. Observe the local disposal guidelines.
7.3 Preparing the unit fastening

• If necessary:
  Enlarge the existing ∅ 6.5 mm drill holes for fastening the sunroof to a diameter of 8.5 mm (fig. 7 ).

7.4 Attaching the seal for the cab roof
NOTICE!
Ensure that the adhesive surface for the seal between the unit and the cab roof is clean (free of dust, oil, etc.).

• Stick the insulating tape to the cab roof (fig. 8):
  • 10 x 20 mm for the most common installation environments
  • 35 x 20 mm (optional for RT780), if more space is required between the unit and the cab roof

• Provide the abutting edge and the top edge of the insulating tape with an unhardened plastic butyl sealing compound (e.g. SikaLastomer-710).

7.5 Preparing the unit (RT780 only)
NOTICE!

• During preparatory work on the surfaces, secure the unit from falling down.
• Make sure that the work surface is clean and level to ensure that the unit is not damaged.
• Do not exceed the specified torque under any circumstances. This is the only way to ensure that the thread inserts are not torn out.

Proceed as follows (fig. 9 ):

• Place the air conditioning roof unit on a work surface with the housing facing down.
• Screw in the self-threading thread inserts in the corresponding blind holes.

7.6 Installing the unit in the sunroof

• Set the unit down centrally aligned and in the direction of travel (fig. 10 ) on the sunroof opening.

NOTE
Make sure the air conditioning roof unit is centred perfectly. The seal must be applied continuously around the air conditioning roof unit after being placed on the roof of the vehicle. This is the only way to ensure a tight seal.
NOTICE!
Do not exceed the specified torque under any circumstances. This is the only way to ensure that the thread inserts are not torn out.

• Fix the parking cooler in place as illustrated (fig. 11 )
• SP950T only: After tightening the screws, check whether the spacer sleeves can still be turned. If this is the case, use M8 x 40 screws.

7.7 Installing the electrical supply lines
WARNING!

• The electrical power supply may only be performed by qualified personnel with specialist knowledge.
• Make sure there is no voltage present on electrically operated components before carrying out work on them!

NOTICE!

• Fit a fuse of 25 amps to the connection to the vehicle’s power supply.
• The battery must be able to supply the required current and voltage (chapter “Technical data” on page 20).
• Cut the connection cable to the shortest possible length. Otherwise the voltage drop is increased and thereby the air conditioning roof unit‘s performance reduced.

NOTE
The unit is equipped as standard with a 4 m long cable with a cross-section of 6mm 2 . If longer cable lengths are required, then the cable cross-section must be increased by an authorised specialist workshop: In this case cut off the cable as closely as possible to the unit (max. 0.5 m) and then establish a suitable connection with a larger cable cross-section.
When the cable is extended by 4 m to 6 m in length, the manufacturer recommends using a cross-section of at least 8 mm 2 . You can connect the unit to the battery via the lorry’s terminal block or directly. The terminal block is to be preferred for the connection. Ask your vehicle manufacturer for the specifications of the terminal block.
Proceed as follows (fig. 5):

• Lay the supply line and connect it to the vehicle (red line to plus, black line to minus).
• Plug in the supply line plug into the socket of the air conditioning roof unit supply line.
• To relieve strain on the supply line, secure it with a cable tie, e.g. to the cab roof.

7.8 Installing supply lines to the condenser unit (SP950Tonly)
Observe the following instructions when installing the supply lines:

• Also observe the installation instructions for the condenser unit.
• The maximum cable length between the evaporator and condenser unit is 4.20 m (fig. 15).
• When installing and bending supply lines, avoid narrow radii. Use a suitable round object as a bending aid. A radius which is too narrow will buckle the refrigerant line, and the parking cooler will be inoperable.
  • Shorten any supply line which is not needed by bending a curve.
  • Apply packing compound (fig. 15) to prevent water entering between the rear wall of the truck and the clip.

NOTE
If you wish to avoid damaging the rear wall of the truck (drilling a hole), you can also apply the clip using a suitable adhesive. Observe the instructions provided by the adhesive manufacturer.

• Fasten the supply lines to the rear wall of the truck using the clips provided (fig. 15).
• Insert the corrugated piping in the holder provided (fig. 15.2).
• Put the cover on (fig. 15.4).

7.9 Adjusting the cover frame
When installed, the outlet unit must protrude approx. 6 mm over the cover frame.

• Cut the cover frame to suit the properties of the vehicle (fig. 13).

7.10 Fastening the cover frame
NOTICE!
Screw the screws in carefully order not to damage the cover frame.

• Fix the cover frame in place as illustrated (fig. 14).

Configuration of unit software

Before you first start up the unit, the controls can be adapted to suit the installation conditions. This must be done by the person installing the unit.
In configuration mode, the following unit software parameters must be set at the control panel (fig. 4 ):

Menu level

| Parameter| Meaning|

Default setting

---|---|---|---
1| Set temperature| The unit starts at the temperature defined here.| 20 °C (68 °F)
2| Low voltage cut-off| The battery monitor shuts down the unit at the voltage defined here.| Characteristic figure 4 = 22,8 V
3| Operating mode| The unit starts with the operating mode
defined here.| 0 = Automatic mode
4| Default settings| Parameters 1 – 3 can be reset to the
default settings.|

—

5| Temperature unit display| The temperature can be displayed in °C
or °F.| °C

NOTE
Configuration mode can still be activated if the undervoltage protection mechanism has switched off the unit and only residual voltage is available.
8.1 Starting and ending configuration mode
The adjustable parameters can be changed in configuration mode:

• When using the button to switch on the unit, hold both buttons + and – pressed until the compressor LED flashes.
  ✓ You are now in configuration mode.
  ✓ The display version (e. g. “3.1S”) appears in the display for 2 seconds.
  ✓ The first digit of the display shows the menu level and the second and third digits show the parameters which can be set, e.g. 1.17 for menu level 1 and a set target value of 17 °C.

NOTE
If you make no entry on the control panel for 60 seconds, the unit quits configuration mode and shuts down.

• Press the button to quit configuration mode.

8.2 Menu level 1: Set temperature
The unit always starts with a defined value for the room temperature. This
parameter can be configured between 17 and 30 °C (62 and 86 °F).

• Start configuration mode (chapter “Starting and ending configuration mode” on page 15).
  ✓ The first digit of the display shows the menu level and the second and third show the parameter which can be set.

• Press the button to change the parameters.

• Use the + and – buttons to select the target value (in °C) at which the unit should start operation.
  ✓ The digits in the display flash until the parameter you entered is confirmed.

• Press the button to confirm your entry.
  ✓ The set value is saved and is then used when the unit is restarted.
  ✓ You are now in menu level 1 again and can use the + and – buttons to switch between menu levels.

8.3 Menu level 2: Low voltage cut-off
The battery monitor protects the battery from excessive discharging.
NOTICE!
When the battery monitor switches the device off, the battery only has part of its charging capacity. Avoid starting repeatedly or operating electrical consumers. Make sure that the battery is recharged. As soon as the required voltage is available again, the unit can be operated again.
If only the set power supply is available here for the air conditioning roof unit, the unit is switched off.

• Start configuration mode (chapter “Starting and ending configuration mode” on page 15).
  ✓ The first digit of the display shows the menu level and the second and third show the parameter which can be set.

• Press the + button once to switch to menu level 2.

• Press the button to change the parameter.
  ✓ The digits in the display flash until the parameter you entered is confirmed.

• Use the + and – buttons to set the value for low voltage shutdown. The characteristic figures at second and third place on the display represent the voltage (V) at which the unit is shut down:
  Characteristic figure| Low voltage shutdown
  ---|---
  1| 22.2
  2| 22.4
  3| 22.6
  4| 22.8
  5| 22.9
  6| 23
  7| 23.1
  8| 23.2
  9| 23.4
  10| 23.6

• Press the button to confirm your entry.
  ✓ The set value is saved and is then used when the unit is restarted.
  ✓ You are now in menu level 2 again and can use the + and – buttons to switch between menu levels.

8.4 Menu level 3: Operating mode
The unit always starts with a defined operating mode for room temperature. This parameter can be configured:

• Start configuration mode (chapter “Starting and ending configuration mode” on page 15).
  ✓ The first digit of the display shows the menu level and the second and third show the parameter which can be set.

• Press the + button twice to switch to menu level 3.

• Press the button to change the parameters.
  ✓ The digits in the display flash until the parameter you entered is confirmed.

• Use the + and – buttons to set the mode with which the unit starts up:
  Characteristic figure| Automatic mode
  ---|---
  1| Operating mode 1
  2| Operating mode 2
  3| Operating mode 3

• Press the button to confirm your entry.
  ✓ The set value is saved and is then used when the unit is restarted.
  ✓ You are now in menu level 3 again and can use the + and – buttons to switch between menu levels.

8.5 Menu level 4: Default setting
You can reset the parameters you set in configuration mode on menu levels 1 to 3 to the default settings:

• Start configuration mode (chapter “Starting and ending configuration mode” on page 15).
  ✓ The first digit of the display shows the menu level and the second and third show the parameter which can be set.

• Press the + button three times to switch to menu level 4.
  ✓ The display shows –.

• Press the button, to reset the unit to the factory settings.
  ✓ — flashes in the display.

• Press the + button.
  ✓ The display shows 00.

• Press the button to confirm your entry.
  ✓ The parameters set in configuration mode are reset to the default setting.
  ✓ You are now in menu level 4 and can use the + and – buttons to switch between menu levels.

8.6 Menu level 5: Temperature unit display
The system can display the room temperature in °C or °F. This parameter can be
configured:

• Start configuration mode (chapter “Starting and ending configuration mode” on page 15).
  ✓ The first digit of the display shows the menu level and the second and third show the parameter which can be set.

• Press the + four times to switch to menu level 5.

• Press the button to change the parameters.
  ✓ The digits in the display flash until the parameter you entered is confirmed.

• Use the + and – buttons to select the temperature unit that the system should display.

• Press the button to confirm your entry.
  ✓ The set value is saved and is then used when the unit is restarted.
  ✓ You are now in menu level 5 again and can use the + and – buttons to switch between menu levels.

Technical data

|

Air conditioning roof unit CoolAir RT780

---|---
Cooling capacity:| 820 W
Rated input voltage:| 24 Vg
Input voltage range:| 22.5 Vg – 30 Vg
Max. current consumption:
:| 22 A
Low voltage shutdown:| Configurable (chapter “Menu level 2: Low voltage cut- off” on page 17)
Dimensions (L x B x H):| 635 x 830 x 188 mm
Weight| approx. 21 kg
|

CoolAir SP950 parking cooler with SP950T roof evaporator unit

Cooling capacity:| 850 W
Rated input voltage:| 24 Vg
Input voltage range:| 22.5 Vg – 30 Vg
Max. current consumption:
Low voltage shutdown:| 22 A
Dimensions (L x B x H in mm)
Evaporator unit:
Condenser unit:| Configurable (chapter “Menu level 2: Low voltage cut-off” on page 17)
577x779x60mm
156 x 346 x 490 mm
Weight:
Evaporator unit:
Condenser unit:| approx. 15 kg
approx. 12 kg

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References

• Dometic | Dometic Australia
• Contact Us | Support for You | Dometic USA
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