Instructions
118A5495A - AN405821998738en-000102 | 9
© Danfoss | Climate Solutions | 2023.02 | LCA012A024
4 – Installation
Since the inverter is in the advancing phase, if an advancing capacitor is installed, the power factor drops in reverse. Never install an advancing capacitor,
because it may be broken.
Use a dedicated grounding always. Never use a common grounding with large power equipment such as a motor, or transformer. It should be avoided to
connect to other simple grounding cable for prevention of electric shock only, or steel structure.
Implement the D-type grounding (grounding resistance at 100 Ω or less).
Ground as close as possible to the condensing unit, with a cable as short as possible.
Separate lines of the power supply cable and the power cable of other devices.
Where the unit is installed close to a device that emits electromagnetic radiation, install it avoiding the radiating plane from being directed to the
electric equipment box on the unit.
Installation place (Select a place approved by the user.)
Selection of installation place
• Where air will be ventilated well.
• Sturdy foundation
• Where the suction inlet and outlet are free from obstructions.
• Where it will not subjected to heat radiation from other heat source.
• Where the air outlet will not be blown with strong winds.
• Where the unit is not regulated strictly with respect to electric noise.
• Where drain water may be discharged.
• Where noise or hot air will not be nuisance to next door house.
• Where the unit will not be buried under snow.
• Where the unit is separated more than 5 m from TV or radio. (Where there is a potential electric interference.)
NOTE:
a) Where two or more units are installed, secure sufficient suction spaces to prevent possible short-circuit in air flow particularly.
b) Avoid to install where combustible gas could be leaked.
c) When the unit is installed at a special place as follows, consult your dealer to prevent possible corrosion or failures.
• Where corrosive gas generates (a spa).
• Where it is exposed to salty winds (a coast).
• Where it becomes smoky.
• Near a machine that generates electromagnetic radiation.
Caution:
Be sure to secure installation spaces.
• It could cause failures on the compressor or electric equipment owing to short-circuit in air flow.
*Device to be connected to low pressure side
Select and connect devices (show case, etc.) to be connected to the low pressure side of condensing unit according to the following table.
Item
Specifications
Number of
connectable units
1 unit - 8 units
Load capacity
Determine the capacity of indoor units (show cases, etc,) connecting to the low pressure side of refrigeration unit, such that
the total rated nominal capacities of these units, is over 50% and below 100% of the refrigeration unit’s capacity
Minimum load during
operation
Where two or more indoor units are connected and low pressure side devices are turned off by the thermostat OFF, arrange
it such that they will operate at over 50% of refrigeration unit’s rated capacity.
Module controller
Use specific module controllers and expansion valves recommended by Danfoss
Expansion valve
Select an appropriate diameter for electronic expansion valve.
Recommended (Example) ... When 3 units of low pressure side devices are connected: AKV 10P4
Heat exchanger
specifications
Select specifications with which the refrigerant flow speed in the heat exchanger piping is within the oil returnable range
in the following figure.
Range of gas flow speed at the evaporator outlet during rated operation.
Install the earth leakage breaker on the electric circuit to provide more safe protective function. It will prevent electric shock in the event of earth
leakage.
Cleaning solution of gas cooler, or antifreeze solution, should not be disposed in a sewer, but disposed according to provisions of applicable
laws. For details, consult your dealer or the customer service desk of maker.
EEV
G (kg/s)
EVAPORATOR
v(m/s)
ρ
G
(kg/m
3
)
G=Q/Δh
v=G/(ρ
G
·
n
·
A)
G: Amount of refrigerant circulang (kg/s)
Q: capacity (kW)
Δh: enthalpy (kJ/kg)
v: flow speed per pass (m/s)
ρ
G
: refrigerant density (kg/
m
3
)
n: number of circuit
A: cross-seconal area of the pipe (m
2
)
A(
m
2
)
n
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
-45 -40 -35 -30 -25 -20 -15 -10 -5
0
5
Flow speed in pipe/
heat exchanger path v (m/s)
Evaporation temperature T (ºC)
Oil returnable range
Danf
os
s
80G8354
Fig. 7
