Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 81

Model
100VN～140VN
100VNX
125VNX,140VNX
100VS～140VS
100VSX～140VSX
●
The specifications shown in the above table are for units without heaters. For units with heaters, refer to the installation instructions or the construction
In the case of a rigid (clutch) type
instructions of the indoor unit.
● Switchgear or Circuit breaker capacity which is calculated from MAX. over current should be chosen along the regulations in each country.
With a conventional tool
●
The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than three cables contained in a conduit and a
voltage drop is 2%. For an installation falling outside of these conditions, follow the internal cabling regulations. Adapt it to the regulation in effect in each
country.
0〜0.5 0.7〜1.3
5. TEST RUN
Gas side
operation valve Indoor unit
Check joint
1) Test run method
(1) A test run can be initiated from an outdoor unit by using SW3-3 and SW3-4 for on-site
(2) Switching SW3-3 to ON will start the compressor.
(3) The unit will start a cooling operation, when SW3-4 is OFF, or a heating operation, when SW3-4 is ON.
(4) Do not fail to switch SW3-3 to OFF when a test run is completed.
2) Checking the state of the unit in operation
Use check joints provided on the piping before and after the four-way valve installed inside the outdoor
unit for checking discharge pressure and suction pressure.
As indicated in the table shown on the right, pressure detected at each point will vary
depending on whether a cooling or heating operation has been selected.
3) Setting SW3-1, SW3-2, on-site
(1) Defrost control switching (SW3-1)
Installation's pipe length (m)
covered without additional
(2) Snow guard fan control (SW3-2)
refrigerant charge
30
4) Failure diagnosis in a test run
Error indicated on the
●
5) The state of the electronic expansion valve.
The following table illustrates the steady states of the electronic expansion valve.
Valve for a cooling operation
Valve for a heating operation
6) Heed the following on the first operation after turning on the circuit breaker.
Pipe cover (accessory)
This outdoor unit may start in the standby mode (waiting for a compressor startup), which can continue up to 30 minutes, to prevent the oil
level in the compressor from lowering on the first operation after turning on the circuit breaker. If that is the case, do not suspect a unit failure.
6. UTILIZATION OF EXISTING PIPING.
Exterior tape
Check whether an existing pipe system is reusable or not by using the following flow chart.
Gas piping
insulation
Power source MAX. over current (A) Cable length (m)
Power cable thickness(mm 2 )
Single phase 3 wire
24 25
220-240V 50Hz
5.5
220V 60Hz
26 23
3 phase 4 wire
3.5 15 27
380V 50Hz
●
Before conduct a test run, do not fail to make sure that the operation valves are closed.
WARNING
●
Turn on power 6 hours prior to a test run to energize the crank case heater.
●
In case of the first operation after turning on power, even if the unit does not move for 30 minutes, it is not a breakdown.
● Always give a 3-minute or longer interval before you start the unit again whenever it is stopped.
●
Removing the service panel will expose high-voltage live parts and high-temperature parts, which are quite dangerous.
Take utmost care not to incur an electric shock or burns. Do not leave the unit with the service panel open.
●
When you operate switches (SW3, SW5) for on-site setting, be careful not to touch a live part.
CAUTION ●
You cannot check discharge pressure from the liquid operation valve charge port.
●
The 4-way valve (20S) is energized during a heating operation.
●
When power supply is cut off to reset the unit, give 3 or more minutes before you turn on power again after power is cut
off. If this procedure is not observed in turning on power again, "Communication error between outdoor and indoor unit"
may occur.
setting.
・ When this switch is turned ON, the unit will run in the defrost mode more frequently.
・ Set this switch to ON, when installed in a region where outdoor temperature falls below zero during the season the unit is run for a heating
operation.
・ When this switch is turned on, the outdoor unit fan will run for 10 seconds in every 10 minutes, when outdoor temperature falls to 3℃ or
lower and the compressor is not running.
・ When the unit is used in a very snowy country, set this switch to ON.
Printed circuit board LED(The cycles of 5 seconds)
Failure event
remote control unit Red LED
Green LED
Open phase
E34 Blinking once Blinking continuously
63H1 actuation or operation with operation valves shut
E40 Blinking once Blinking continuously
(occurs mainly during a heating operation)
Low pressure error or operation with operation valves shut
Blinking once
E49 Blinking continuously
(occurs mainly during a cooling operation)
If an error code other than those listed above is indicated, refer to the wiring diagram of the outdoor unit and the indoor unit.
When the unit comes to a normal stop
When power is turned on
During a cooling operation During a heating operation
Complete shut position Complete shut position
Full open position Full open position Complete shut position
START
Are an outdoor unit and an indoor unit connected to the NO
existing pipe system to reuse?
YES
Which of the following refrigeration oils
NO
Are the existing units our products? does the existing unit use?
Suniso, MS, Barrel Freeze, HAB, Freol,
YES YES
ether oil, ester oil
Does the existing pipe system to reuse satisfy all of the following?
(1) The pipe length is 50m or less.
(2) The pipe size conforms to the table of pipe size restrictions.
(3) The elevation difference between the indoor and outdoor units NO
conforms to the following restrictions.
Where the outdoor unit is above: 30m or less
※Check with the flow chart developed for a case where
Where the outdoor unit is below: 15m or less
an existing pipe system is reused for a
YES
twin-triple-double-twin model published as a
technical data sheet.
YES
※
At the connection with the duct type indoor unit.
Indoor-outdoor wire thickness × number
Grounding wire thickness Model Power source
100VN,100VNX
125VN
Single phase 3 wire
φ1.6mm x 3
φ1.6mm
140VN
220-240V 50Hz
220V 60Hz
125VNX
140VNX
100VS,100VSX
3 phase 4 wire
125VS,125VSX 380-415V 50Hz
380V 60Hz
140VS,140VSX
A failure to observe these instructions can result in a compressor breakdown.
SW-3-3 SW-3-4
OFF Cooling during a test run
ON
ON Heating during a test run
OFF - - - -
Normal or After the test operation
Charge port of the
Check joint of the pipe
gas operation valve
Cooling Discharge pressure Suction pressure
operation (High pressure) (Low pressure)
Heating Suction pressure Discharge pressure
operation (Low pressure) (High pressure)
Action
Check power cables for loose contact or disconnection
1. Check whether the operation valves are open.
2. If an error has been canceled when 3 minutes have elapsed
since a compressor stop, you can restart the unit by
effecting Check Reset from the remote control unit.
When the unit comes to an abnormal stop
During a cooling operation During a heating operation
Full open position Full open position Full open position
Full open position Full open position
<Table of pipe size restrictions>
◎:Standard pipe size ○:Usable
△:Restricted to shorter pipe length limits ×:Not usable
Additional charging amount of refrigerant per 1m
Liquid pipe
Pipe size
Gas pipe
Can't
NO Use Usability
Make an inquiry
for reusability. 100VN
Maximum one-way pipe length
100VS
Length covered without additional charge
Can Use
Usability
125VN
Maximum one-way pipe length
125VS
Length covered without additional charge
Usability
140VN
Maximum one-way pipe length
140VS
Length covered without additional charge
Change is impossible.
MAX. over current (A) Cable length (m) Grounding wire thickness
Power cable thickness(mm 2 )
25 24
5.5
27 22
28 32
8
29 31
φ1.6mm
30 30
16 26
18 23
3.5
19 21
● When you leave the outdoor unit with power supplied to it,
Items to checkbefore a test run
be sure to close the panel.
Item No.used in the
Item Check item
installation manual
If brazed, was it brazed under a nitrogen gas flow?
Were air-tightness test and vacuum extraction surely performed?
Refrigerant
2
Are heat insulation materials installed on both liquid and gas pipes?
plumbing
Are operation valves surely opened for both liquid and gas systems?
Have you recorded the additional refrigerant charge volume and refrigerant pipe length on the panel's label?
Is the unit free of cabling errors such as uncompleted connection, an absent or reversed phase?
Are properly rated electrical equipments used for circuit breakers and cables?
Doesn't cabling cross-connect between units, where more than one unit are installed?
Aren't indoor-outdoor signal wires connected to remote control wires?
Electric
Do indoor-outdoor connecting cables connect between the same terminal numbers?
4
wiring
Are either VCT cabtyre cables or WF flat cables used for indoor-outdoor connecting cables?
Does grounding satisfy the D type grounding (type III grounding) requirements?
Is the unit grounded with a dedicated grounding wire not connected to another unit's grounding wire?
Are cables free of loose screws at their connection points?
Are cables held down with cable clamps so that no external force works onto terminal connections?
Is indoor unit installation work completed?
ー
Indoor unit
Where a face cover should be attached onto an indoor unit, is the face cover attached to the indoor unit?
Test run procedure ● Always carry out a test run and check the following in order as listed.
Turn The contents of operation
①
Open the gas side operation valve fully.
②
Open the liquid side operation valve fully.
③
Close the panel.
④
Where a remote control unit is used for unit setup on the installation site, follow instructions for unit setup on the installation site with a remote control unit.
SW3-3 ON / SW3-4 OFF: the unit will start a cooling operation.
⑤
SW3-3 ON / SW3-4 ON: the unit will start a heating operation.
⑥
When the unit starts operation, press the wind direction button provided on the remote control unit to check its operation.
⑦
Place your hand before the indoor unit's diffuser to check whether cold (warm) winds come out in a cooling (heating) operation.
⑧
Make sure that a red LED is not blinking.
⑨
When you complete the test run, do not forget to turn SW3-3 to the OFF position.
⑩
Where options are used, check their operation according to the respective instruction manuals.
SWITCHES FOR ON-SITE SETTING
SW5
ON
1 2 3 4
All set to OFF for shipment
0.06kg/m 0.08kg/m Additional charging amount of refrigerant per 1m
φ 9.52 φ 9.52 φ 12.7 φ 12.7
Liquid pipe
Pipe size
φ 15.88 φ 19.05 φ 15.88 φ 19.05
Gas pipe
◎ ○※1 △ △※1
Usability
100VNX
50 50 25 25 Maximum one-way pipe length
100VSX
30 30 15 15 Length covered without additional charge
◎ ○※1 △ △※1
Usability
125VNX
50 50 25 25 Maximum one-way pipe length
125VSX
30 30 15 15 Length covered without additional charge
◎ ○※1 △ △※1
Usability
140VNX
50 50 25 25 Maximum one-way pipe length
140VSX
30 30 15 15 Length covered without additional charge
PSB012D955F
Indoor-outdoor wire thickness × number
φ1.6mm x 3
Check
Check
SWITCHES FOR ON-SITE SETTING
SW3
ON
1 2 3 4
All set to OFF for shipment
0.08kg/m
0.02kg/m 0.06kg/m
φ 6.35 φ 9.52 φ 9.52 φ 12.7 φ 12.7
φ 15.88 φ 15.88 φ 19.05 φ 15.88 φ 19.05
△ ◎ ○※1 △ △※1
20 100 100 50 50
10 30 30 15 15
△ ◎ ○※1 △ △※1
20 100 100 50 50
10 30 30 15 15
△ ◎ ○※1 △ △※1
20 100 100 50 50
10 30 30 15 15