MITSUBISHI ELECTRIC LOSSNAY LGH-15RVX-E (01) PDF Document

You must follow these warnings to prevent death or serious injury:

• Do not turn the unit on or off when flammable gas has leaked. It could catch fire or cause an explosion with sparks released from the electric contractor. Open windows to ventilate.

• Do not modify or disassemble the unit. It could cause fire, electric shock, or injury.

• Do not apply water to the unit and remote controller. Electrical shock can result.

• Do not poke your fingers or sticks into the air intake and outlet while the product is operating. Failure to heed this warning may result in injury.

• Do not operate with wet hands. Electrical shock can result.

• Use the specified power supply and voltage. Use of incorrect power supply could cause fire or electric shock.

• Make sure the power supply isolator is turned off on the power distribution panel before starting maintenance. It could cause electric shock or injury if it is turned on.

• When any abnormal conditions (burning smell, or others) are observed, stop operation, turn off the power supply isolator on the power distribution panel and consult your dealer. Continuing operation under such conditions could cause, electric shock, fire, or damage.

Please observe the following cautions:

• Do not place a burning appliance in a place where it is exposed directly to the wind from the Lossnay. It could cause an accident as a result of incomplete combustion.

• Do not operate with the “BY-PASS” when heating the room in winter. Condensed water may drip from the unit and wet the surface of the ceiling.

• Do not use at a place where exposed to high temperatures (40°C or higher), naked flames, or in an environment with heavy fumes. It could cause fire.

• Do not use in an environment such as a chemical factory, where hazardous gases such as acidic gases, alkaline gases, organic solvent fumes, paint fumes, or gases containing corrosive components are generated. It could malfunction.

• Securely install parts after maintenance. It could cause injury if parts fall.

• Put on gloves during maintenance. It could cause injury.

• Make sure the power supply isolator is turned off on the power distribution panel when the Lossnay is not used for a long period of time. It could cause electric shock, power leakage, or fire as a result of deteriorated insulation.

• This appliance 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 appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.

• This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.

When not connected to an external device, you can run the MITSUBISHI ELECTRIC LOSSNAY LGH-15RVX-E using the optional Lossnay remote controller (PZ-61DR-E). If two remote controllers are used, the last controller to be used has priority (Last Command).

If an external device is connected, the “On/Off” function of this device will also control the Lossnay operation.

• If you would like to turn ON the Lossnay alone while the external device is OFF, operate it by the Lossnay remote controller.

• The fan speed is on Fan speed 3 or Fan speed 4.

• The ventilation mode is “Auto Ventilation Mode”.

In this setting, both fresh air supply and return air pass through the energy recovery cores. Energy recovery ventilation makes the fresh air temperature close to the indoor temperature in the winter and the summer season.

In the By-pass Ventilate setting, the fresh air passes through the Lossnay cores, and the return room air is exhausted directly. This setting is normally operated during the spring/autumn season.

The automatic ventilation mode automatically provides the correct ventilation for the conditions in the room. The “By-pass” ventilation will have the following effects under various conditions:

1. Reduces cooling load

If the air outside is cooler than the air inside the building during the cooling season (such as early morning or at night), “By-pass” ventilation will draw in the cooler outside air and reduce the cooling load on the system.

2. Night purge

“By-pass” ventilation can be used to release hot air from inside the building that has accumulated in buildings during the hot summer season.

3. Office equipment room cooling

During the cold season, fresh air can be drawn in and used as is to cool rooms where the temperature has risen due to the use of office equipment.

CAUTION

• In the case of “By-pass” ventilation, the supply air temperature slightly rises more than the outside air temperature because of the heat effect around the ducts or the unit motors.

• When set to auto ventilation mode while using the pre-heater function, the outdoor temperature may be detected as higher and the mode may change to by-pass mode, even in winter.

To prevent a deterioration in the Lossnay functions, remove all dust and dirt on air filters and Lossnay cores at regular intervals. The guideline is as follows:

• Clean the air filters once a year (or when indicated on the remote controller).

• Clean the Lossnay cores once every two years. (Clean the Lossnay cores once a year if possible.)

Frequency should be increased depending on the extent of dirt.

1) Maintenance cover

1. Remove the black screw.

2. Slide the fix piece to the outside.

3. Open the hinge wire.

Note: Models LGH-150 and 200RVX-E have 2 fix pieces.

2) Lossnay cores

Take hold of the handle and draw the Lossnay cores out from the main unit.

3) Air filters

After pulling out the Lossnay cores, undo filter guides, then remove the air filters, located at the bottom left and right of the Lossnay cores.

CAUTION

• Bow filter stoppers a little to remove them from the filter guide.

• Take filter stoppers carefully not to break them.

1) Air filters

Use a vacuum cleaner to remove light dust. To remove stubborn dirt, wash in a mild solution of detergent and lukewarm water (under 40°C).

CAUTION

• Never wash the filters in very hot water and never wash them by rubbing them.

• Do not dry the filters by exposing them to a flame.

2) Lossnay cores

Use a vacuum cleaner to suck up the dust and dirt on the exposed surfaces of the Lossnay cores. Use a soft brush only to clean exposed surface areas. Do NOT wash in water.

CAUTION

• Do not use the hard nozzle of the vacuum cleaner. It may damage the exposed surfaces of the Lossnay cores.

• Under no circumstances should the Lossnay cores be washed in water.

Bearing in mind the following points, assemble the parts following the sequence for their removal in reverse.

• Arrange the Lossnay core with the air filter side downward.

• The filter for LGH-15 and 35RVX-E has a front and back side. Set the “FRONT” (printed) side of the filter on the outer side.

Note: If maintenance indicators are shown on the remote controller, turn off the indication after maintenance.

* The above values apply during Lossnay ventilation when the fan speed is set to Fan speed 4 at the rating pressure loss and 230 V / 50 Hz.

* For the specifications at the other frequency or voltages, contact your dealer.

* The values given in the table for the noise level reflect the levels measured at a position 1.5 meters immediately below the unit in an anechoic chamber.

* Noise change or increase may occur because of the Bypass-Automatic function or Automatic fan speed change by timer setting and/or other functions.

* Temperature Exchange efficiency (%) are based on winter condition.

* Mitsubishi Electric measures products according to Japan Industrial Standard (JIS B 8628), therefore Q-H curves are measured by chamber method.

* On-site commissioning measurements by pitot tube method could be as much 20% difference from JIS test room conditions. If the measuring point is close to sources of turbulence like bends, contractions and dampers etc, it is difficult to measure air volume correctly. A straight duct length more than 10D (D=duct diameter) from the source of turbulence is recommended for correct measurement. On-site measurement should therefore be measured in accordance with BSRIA guideline (Commissioning Air System. Application procedures for buildings AG3/89.3(2001)).

If you hear strange sounds, if no air is blown out, or if some other trouble occurs, switch off the power and contact your dealer. You should perform an attentive inspection if you notice any of the following:

• Fan does not run when the unit is turned on.

• Abnormal noises or vibrations while the unit is running.

• Retarded or irregular rotations. (Motors are components which require maintenance.)

• Burnt odor.

• Corroded or damaged installation section.

If you notice these signs, stop running the unit and turn it off. Then, contact your dealer for prevention of failure or hazard. The dealer should appraise the possible cost.