YMGI VRFI-07EW-D2B(55)5, Installer'S Instruction & User'S Manual

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Safety Precautions
1.
Follow these instructions to complete the necessary installation process. Carefully read this manual before
installation and unit startup or servicing.
2.
Wire size of power cord should be properly sized to meet the required electrical loads. Should the power cord
get damaged, the power cord should be replaced with a manufacturer approved cable.
3.
After connecting the power cord, attach the electric box cover and secure properly.
4.
Always meet the nitrogen charge requirements when welding pipes.
5.
Never short-circuit or cancel the pressure switch as this will result in damage to the unit.
6.
Connect the wired controller before energizing, otherwise the wired controller cannot be used.
7.
Before using the unit, verify the piping and wiring are correct. This will avoid water leakage, refrigerant leakage,
electric shock, or fire etc.
8.
Do not insert fingers or objects into the air outlet or inlet grille.
9.
Open a door or window for ventilation for allowing fresh air to enter the room to avoid depleting the oxygen while
gas/oil supplied heating equipment is used during the installation.
10.
Never start up or shut off the unit by means of directly plugging into or unplugging the power cord from the power
outlet.
11.
Turn off the unit after it runs at least five minutes, otherwise it will influence the oil return of the compressor.
12.
Do not allow children to operate this unit.
13.
Do not operate this unit with wet hands.
14.
Turn off the unit or disconnect the power supply before cleaning the unit. This will avoid possible electric shock
or personnel injury.
15.
Never spray or splash water towards the unit. This can cause a malfunction in the unit or can result in electric
shock.
16.
Do not expose the unit to moist or corrosive environments.
17.
While operating in cooling mode, do not set the indoor units room temperature too low. keeping the temperature
difference between indoor and outdoor unit within 41
℉
(5
℃)
.
18.
YMGI Group recommends that only properly trained and authorized personnel be allowed to repair or service
the unit. Improper repairs or servicing can result in electric shock or fire hazards. Please contact YMGI Group if
you need help locating a qualified repair or service technician.
19.
Before installation, check the power supply to ensure it is sufficient to meet and is in accordance with the
requirements specified on the nameplate of the unit. Ensure the power overload is functioning correctly and
make sure it is properly maintained.
20.
Installation must be performed only by an authorized installer or HVAC professional in accordance with the
requirements set by the NEC and CEC. Do not attempt to install the unit yourself. Improper handling may result
in water leakage, electric shock, fire, and voiding of the warranty.
21.
Be sure to use only approved accessories and parts to prevent water leakage, electric shock and fire.
22.
Make sure the unit is grounded properly prior to connecting to power source, to avoid electric shock. Do not
connect the ground wire to a gas pipe, water pipe, lightning rod or telephone line.
23.
Energize the unit for 8 hours before operation. Turn off or disconnect the power within 24 hours to prevent short-
cycling (to protect the compressor).
24.
If refrigerant leakage happens in a confined space during installation, ventilate immediately. Poisonous gases
can occur if the refrigerant gas is exposed to fire.
25.
Volatile liquids, such as paint thinners or solvents if exposed to
the unit’s surface will cause damage to the
surface finish. Only use a soft cloth along with a mild non-abrasive detergent to clean the outer casing of the
unit.
26.
If the unit does not operate normally or if you notice any type of burning odor, power off the unit and turn off the
main power supply, then immediately contact your YMGI authorized repair service center or HVAC professional.