Mitsubishi Electric LGH-15RVX3-E User manual

Warning:
Repair work must be performed by the manufacturer, its service
agent or a similarly qualified person in order to avoid hazards.
LOSSNAY ENERGY RECOVERY VENTILATOR
HANDBOOK
MODELS
LGH-15RVX3-E
LGH-25RVX3-E
LGH-35RVX3-E
LGH-50RVX3-E
LGH-65RVX3-E
LGH-80RVX3-E
LGH-100RVX3-E
LGH-160RVX3-E
LGH-200RVX3-E
May 2023 No. U318
Remote controller (Optional)
PZ-62DR-EA
PZ-62DR-EB
PZ-43SMF-E
Filter (Optional)
PZ-15RF3-E PZ-15RFP3-E PZ-15RFM3-E PZ-15RFH3-E
PZ-25RF3-E PZ-25RFP3-E PZ-25RFM3-E PZ-25RFH3-E
PZ-35RF3-E PZ-35RFP3-E PZ-35RFM3-E PZ-35RFH3-E
PZ-50RF3-E PZ-50RFP3-E PZ-50RFM3-E PZ-50RFH3-E
PZ-65RF3-E PZ-65RFP3-E PZ-65RFM3-E PZ-65RFH3-E
PZ-80RF3-E PZ-80RFP3-E PZ-80RFM3-E PZ-80RFH3-E
PZ-100RF3-E PZ-100RFP3-E PZ-100RFM3-E PZ-100RFH3-E
Nameplate
<LGH-15 to 100RVX3-E>
Nameplate
<LGH-160 and 200RVX3-E>

Contents
─ 2 ─
Contents
1. Safety precautions .......................................................................... 3
2. Changed points............................................................................... 4
3. Specifications.................................................................................. 4
4. Outside dimensions ........................................................................ 6
5. Electrical wiring diagrams ............................................................. 10
6. Circuit board diagrams.................................................................. 12
7. Troubleshooting ............................................................................ 14
7-1 Service flowchart ....................................................................................14
7-2 Check Details .........................................................................................15
8. Overhauling procedures................................................................ 40
9. Parts catalog ................................................................................. 58
LGH-15RVX3-E ............................................................................................59
LGH-25RVX3-E ............................................................................................67
LGH-35RVX3-E ............................................................................................75
LGH-50RVX3-E ............................................................................................83
LGH-65RVX3-E ............................................................................................91
LGH-80RVX3-E ............................................................................................99
LGH-100RVX3-E ........................................................................................107
LGH-160RVX3-E ........................................................................................115
LGH-200RVX3-E ........................................................................................123
3
4
4-5
6-9
10-11
12-13
14-39
14-15
15-39
40-57
58-130
59-66
67-74
75-82
83-90
91-98
99-106
107-114
115-122
123-130

─ 3 ─
Read the following precautions thoroughly before the maintenance, and then inspect and repair the product in a
safe manner.
The types and levels of danger that may arise if the product is handled improperly are described with the warning
symbols shown below.
Warning
Modification is prohibited
Do not modify the unit.
( Failure to observe this warning may
result in electric shock, fire and/or injury. )
Electric shock
If you must inspect the circuitry while the power is
on, do not touch the live parts.
(Failure to observe this warning may
result in electric shock.)
Check insulation
Upon completing repair work, always measure the
insulation resistance. Verify that it is at least 10 MΩ
(with a 500-V DC insulation resistance tester), and
then turn on the power.
(Inadequate insulation may result in
electric shock.)
Improper handling of the product may
result in serious injury or death.
Caution
Improper handling of the product may result in injury or
damage to properties including buildings and equipment.
Proper electric work
Qualified electricians shall conduct electric work in
accordance with your local electric work regulations
and the installation manuals.
( Improper connection or wiring installation
may result in electric shock and/or fire. )
Replace damaged and/or degraded parts
Be sure to replace the power cord and lead wires if
they are damaged and/or degraded.
(Failure to observe this warning may
result in electric shock and/or fire.)
Use proper parts and tools
For repair, be sure to use the parts listed in the parts
catalog of the applicable model and use the proper
tools.
( Failure to observe this warning may result
in electric shock, fire and/or injury. )
Caution against
electric shock
Prohibited
Be sure to follow
this instruction.
Turn off the power supply
Be sure to shut off the power supply isolator before
disassembling the unit for repair.
(Failure to observe this warning may
result in electric shock.)
Make sure that the product operates properly upon completion of repair. Clean the product and the surrounding
area, and then notify the customer of the completion of repair.
Caution for injury
Do not work at a location where you do not have a
sure footing.
(Failure to observe this caution may
result in a fall.)
Notes for servicing
● Inspect the earth condition, and repair it if it is incomplete. Make sure that a power supply isolator and an over-
load protection device are installed. If they are not installed, recommend the customer to install them.
Be sure to follow
this instruction.
Wear gloves
Wear gloves when servicing.
(Failure to observe this caution may result
in injury to your hands from sharp metal or
other edges.)
1. Safety precautions
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Prohibited

─ 4 ─
2. Changed points
New model Former model Changes from the former model
LGH-15RVX3-E LGH-15RVX-E 1
• The product can be installed vertically.
• The fixing method for the maintenance cover is changed.
• The control circuit board is changed.
• The DC motors are changed.
• The motor fix plates are changed.
• The centrifugal fans are changed.
• The holding structure for the filters is changed.
Before the change After the change
The filter was fixed with the filter stoppers
on the Lossnay core.
The filter is fixed by inserting into the
Lossnay core holders (LR).
Lossnay core
Handle
Main unit
Air filter
Filter stopper
Lossnay core
Air filter
Lossnay core
holder (LR)
<For LGH-160RVX3-E>
The 150 type is changed to the 160 type.
(Air volume specification is changed from 1500 m3/h to 1600 m3/h.)
LGH-25RVX3-E LGH-25RVX-E 1
LGH-35RVX3-E LGH-35RVX-E 1
LGH-50RVX3-E LGH-50RVX-E 1
LGH-65RVX3-E LGH-65RVX-E 1
LGH-80RVX3-E LGH-80RVX-E 1
LGH-100RVX3-E LGH-100RVX-E 1
LGH-160RVX3-E LGH-150RVX-E 1
LGH-200RVX3-E LGH-200RVX2-E
3. Specifications
Model name LGH-15RVX3-E, LGH-25RVX3-E, LGH-35RVX3-E, LGH-50RVX3-E, LGH-65RVX3-E,
LGH-80RVX3-E, LGH-100RVX3-E, LGH-160RVX3-E, LGH-200RVX3-E
Heat exchange system Energy recovery ventilating system
Heat exchanger material Special treated paper plate heat exchanger
Cladding Galvanized steel sheet
Heat insulation material Self-extinguishing urethane foam
Motor EC motor
Filter Non-woven fabrics filter (Coarse 60% (ISO 16890 ))
Surrounding air condition Shall be between 0°C and 40°C, 80%RH or less
Suction air condition Shall be lower than 40°C, 80%RH
Supply fan operation under
low outdoor temperature
-10°C to -15°C : Intermittent operation 60 min ON, 10 min OFF
-15°C or less: Sensing operation 55 min OFF, 5 min ON
Function Energy recovery ventilation/Bypass ventilation, Fan speed 1, 2, 3, 4
Electrical power supply Single phase 220-240 V/50 Hz, 220 V/60 Hz
Insulation resistance 10 MΩ or more
Dielectric strength 1000 V AC 1 minute

─ 5 ─
Model name Input power
(W)
Air volume External static pressure
(Pa)
Temperature exchange efficiency
(%)
Noise
(dB)
Weight
(kg)
(m3/h) (L/s)
LGH-15RVX3-E 55 150 42 120 73.5 27.0 20
LGH-25RVX3-E 75 250 69 120 75.5 30.5 22
LGH-35RVX3-E 120 350 97 160 75.0 30.5 30
LGH-50RVX3-E 185 500 139 150 70.5 35.0 33
LGH-65RVX3-E 245 650 181 150 72.5 37.5 41
LGH-80RVX3-E 343 800 222 170 75.0 39.0 47
LGH-100RVX3-E 438 1000 278 190 75.5 40.0 53
LGH-160RVX3-E 687 1600 444 170 75.0 41.0 96
LGH-200RVX3-E 855 2000 556 170 76.5 41.5 108
* The above values apply during energy recovery 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, see the spec. sheets.
* The values given in the table for the noise level reflect the levels measured at a position 4.9 feet (1.5 m) immedi-
ately 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 (%) is based on a winter condition.
* On-site commissioning measurements by pitot tube method could be as much 20% different from ISO 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 10 D (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)).
Remote controller
Model name PZ-62DR-EA, PZ-62DR-EB PZ-43SMF-E
Power supply requirement 12 V DC (Supplied from Lossnay unit)
Power consumption 0.3 W
Transmission cable Non polarized 2-core cable (0.3 mm2(AWG22) sheathed cable)
Total wiring length 200 m maximum
The number of controllable
Lossnay units 15 Lossnay units maximum (Max. 2 remote controllers installable)
Environmental condition Temperature: 0°C to 40°C, Humidity: 30% to 90% relative humidity (no condensation)
Size 120 x 120 x 19 mm 120 x 70 x 15 mm
Weight 0.25 kg 0.10 kg
Color Grayish white White

─ 6 ─
4. Outside dimensions
LGH-15RVX3-E, LGH-25RVX3-E, LGH-35RVX3-E, LGH-50RVX3-E, LGH-65RVX3-E, LGH-80RVX3-E,
LGH-100RVX3-E
N
J
JA
F
C
F
K L
B
E
D
M
20
M
φG φH
N
115
EA
(exhaust air outlet)
Air exhaust fan
OA
(outside air intake)
Core, air filter, High-
Efficiency filter, fan,
maintenance space
More than 600
Position where duct direction
change is possible
Air filters
Lossnay core
Inspection
opening
450 x 450 or more
Control box
Maintenance cover
Air supply fan
RA
(return air)
SA
(supply air)
By-pass damper plate
Position where duct direction change is possible
High-Efficiency filter (sold separately) attachment position
Ceiling suspension fixture
(4-13 X 20 oval)
Power supply
cable opening
150 to 250
The space surrounded by
chained line is also necessary
for vertical installed units during
it is put horizontal for servicing.
Model Dimensions
Ceiling suspension fixture pitch
Nominal
diameter
Duct connecting flange Duct pitch
Weight
(kg)
A B C D E F G H J K L M N
LGH-15RVX3-E 780 610 289 768 658 65 100 97.5 110 54 450 80 119 50 20
LGH-25RVX3-E 780 735 289 768 782 65 150 142 160 64 530 102.5 102 30 22
LGH-35RVX3-E 888 874 331 875 921 85 150 142 160 64 650 112 124 55 30
LGH-50RVX3-E 888 1016 331 875 1063 85 200 192 208 79 745 135.5 124 30 33
LGH-65RVX3-E 908 954 404 895 1001 70 200 192 208 79 692 131 124 40 41
LGH-80RVX3-E 1144 1004 404 1131 1051 77 250 242 258 79 690 157 165 40 47
LGH-100RVX3-E 1144 1231 404 1131 1278 77 250 242 258 79 917 157 165 40 53
Unit: (mm)

─ 7 ─
LGH-160RVX3-E, LGH-200RVX3-E
1010
C D B A
1144 7944
700
40
270
ø242
ø258
404
808
26
115
ø258
ø242
270
4040
Ceiling suspension fixture
(4-15 x 30 oval)
SA
(supply air)
RA
(return air)
EA
(exhaust air outlet)
OA
(outside air intake)
Core, air filter,
High-Efficiency
filter,
fan,
maintenance
space
Lossnay cores
Air exhaust fan
By-pass damper plate
Air supply fan
Maintenance cover
Inspection
opening
450 x 450 or more
Air filters
More than 600
Power supply cable
opening
Control box
High-Efficiency filter (sold separately) attachment position
150 to 250
Model Dimensions Weight
(kg)
A B C D
LGH-160RVX3-E 1004 690 690 1045 96
LGH-200RVX3-E 1231 917 917 1272 108
Unit: (mm)

─ 8 ─
PZ-62DR-EA, PZ-62DR-EB PZ-43SMF-E
120
19
120
70 15
120
Unit: (mm) Unit: (mm)
PZ-15RF3-E, PZ-25RF3-E, PZ-35RF3-E, PZ-50RF3-E, PZ-65RF3-E, PZ-80RF3-E, PZ-100RF3-E
A
B
C
* The filters are comprised of one set of the same filters as those built in the product.
* Two filters each make up one set of filters.
* Two sets of filters can be installed in one Lossnay unit (LGH-160 and 200 types).
Model Dimensions Applicable model
ABC
PZ-15RF3-E 549 125 20 LGH-15RVX3-E
PZ-25RF3-E 654 151 15 LGH-25RVX3-E
PZ-35RF3-E 784 178 15 LGH-35RVX3-E
PZ-50RF3-E 926 178 15 LGH-50RVX3-E
PZ-65RF3-E 852 213 15 LGH-65RVX3-E
PZ-80RF3-E 890 238 15 LGH-80RVX3-E, LGH-160RVX3-E
PZ-100RF3-E 1117 238 15 LGH-100RVX3-E, LGH-200RVX3-E
Unit: (mm)

─ 9 ─
PZ-15RFP3-E, PZ-25RFP3-E, PZ-35RFP3-E, PZ-50RFP3-E, PZ-65RFP3-E, PZ-80RFP3-E, PZ-100RFP3-E
AC
B
* Two filters each make up one set of filters. (For PZ-25 to 100RFP3-E)
Model Dimensions Applicable model
ABC
PZ-15RFP3-E 542 104.5 25 LGH-15RVX3-E
PZ-25RFP3-E 322 128.5 25 LGH-25RVX3-E
PZ-35RFP3-E 390 158.5 25 LGH-35RVX3-E
PZ-50RFP3-E 461 158.5 25 LGH-50RVX3-E
PZ-65RFP3-E 423 197.5 25 LGH-65RVX3-E
PZ-80RFP3-E 442 215.5 25 LGH-80RVX3-E, LGH-160RVX3-E
PZ-100RFP3-E 554 215.5 25 LGH-100RVX3-E, LGH-200RVX3-E
Unit: (mm)
PZ-15RFM3-E, PZ-25RFM3-E, PZ-35RFM3-E, PZ-50RFM3-E, PZ-65RFM3-E, PZ-80RFM3-E, PZ-100RFM3-E,
PZ-15RFH3-E, PZ-25RFH3-E, PZ-35RFH3-E, PZ-50RFH3-E, PZ-65RFH3-E, PZ-80RFH3-E, PZ-100RFH3-E
A
B
C
* Two filters each make up one set of filters. (For PZ-25 to 100RFM3-E and PZ-25 to 100RFH3-E)
Model Dimensions Applicable model
ABC
PZ-15RFM3-E 542 125 13 LGH-15RVX3-E
PZ-25RFM3-E 322 151 13 LGH-25RVX3-E
PZ-35RFM3-E 390 178 13 LGH-35RVX3-E
PZ-50RFM3-E 461 178 13 LGH-50RVX3-E
PZ-65RFM3-E 423 213 13 LGH-65RVX3-E
PZ-80RFM3-E 442 238 13 LGH-80RVX3-E, LGH-160RVX3-E
PZ-100RFM3-E 554 238 13 LGH-100RVX3-E, LGH-200RVX3-E
PZ-15RFH3-E 542 104.5 25 LGH-15RVX3-E
PZ-25RFH3-E 322 128.5 25 LGH-25RVX3-E
PZ-35RFH3-E 390 158.5 25 LGH-35RVX3-E
PZ-50RFH3-E 461 158.5 25 LGH-50RVX3-E
PZ-65RFH3-E 423 197.5 25 LGH-65RVX3-E
PZ-80RFH3-E 442 215.5 25 LGH-80RVX3-E, LGH-160RVX3-E
PZ-100RFH3-E 554 215.5 25 LGH-100RVX3-E, LGH-200RVX3-E
Unit: (mm)

─ 10 ─
5. Electrical wiring diagrams
LGH-15RVX3-E, LGH-25RVX3-E, LGH-35RVX3-E, LGH-50RVX3-E, LGH-65RVX3-E, LGH-80RVX3-E, LGH-100RVX3-E
* Wiring for TM1, TM2, TM3, TM4, and TB5 shown in dotted lines are field work.
* Be sure to connect the earth wire.
* An all pole electric leakage isolator must be installed.
* Always use an isolator for the main power connection.
9
10
S
A
B
1
2
1
2
NL
NL
CN12
CN119
CN114
CN10
LED6
TAB1 TAB2
TM1
Power supply terminal
SW5
SW6
SW2
TM2
TB5
TM4
TM3
PZ-62DR-EA/EB
LED3
LED2
LED1
Y
Z
Supply fan motor
Exhaust fan motor
(For LGH-15 and 25 RVX3-E types)
Monitor output
12 V or 24 V DC
Mr. Slim (non-polar)
Volt-free contact
M-NET transmission cable
2nd remote controller
(Max. 2 controllers)
2nd Lossnay unit
(Max. 15 units)
Isolator (Field supply)
POWER SUPPLY
220–240 V/50 Hz
220 V/60 Hz
LINE FILTER
Shielded Wire
X11
Power circuit boardControl circuit board
CN113
REACTOR
M
2
GM
LED4
CN19
CN14
CN35 CN5 CN7CN34
SW12 SW11
LINE FILTER
Lossnay unit
LED5
CN23
CN3
CN9
M
1
TH1
(OA)
TH2
(RA)
CN32
CN20CN105
CN50 CN26 CN17
Definition of symbols
M1: Motor for exhaust fan
M2: Motor for supply fan
GM: Motor for Bypass damper
TH1: Thermistor for outdoor air
TH2: Thermistor for return air
SW2, 5: Switch (Function selection)
SW6: Switch (Model selection)
TM1: Terminal block (Power supply)
TM2: Terminal block (External control input)
TM3: Terminal block (Monitor output)
TM4:
Terminal block (Remote controller transmission cable)
TB5: Terminal block (M-NET transmission cable)
TAB1, TAB2: Connector (Power supply)
X11: Relay contact
CN3: Connector (Reactor)
CN5: Connector (Thermistor RA)
CN7: Connector (Thermistor OA)
CN9: Connector (Fan motor)
CN10: Connector (Fan motor)
CN12: Connector (Damper motor)
CN17: Connector (Fan speed 1/2/3/4)
CN14: Connector
CN113: Connector
CN114: Connector
CN19: Connector
CN119: Connector
CN20: Connector (Dx-coil unit)
CN23: Connector (CO2sensor power supply)
CN26: Connector (Bypass switching/CO2sensor input)
CN32: Connector (Remote control selection)
CN34: Connector (CO2sensor output)
CN35: Connector (CO2sensor input)
CN50: Connector (Optional components: External
monitor output)
CN105: Connector (For IT communication)
SW11: Address setting rotary switch (ones digit)
SW12: Address setting rotary switch (tens digit)
LED1: Inspection indicator lamp
LED2: M-NET indicator lamp
LED3:
Remote controller power supply indicator lamp
LED4, LED6: Power supply indicator lamp
LED5: CO2sensor power supply indicator lamp
(When the CO2sensor is connected)
SYMBOL : Terminal block, : Connector on PCB
Select proper isolator according to the electrical current information in the chart below.
Model LGH-15RVX3-E LGH-25RVX3-E LGH-35RVX3-E LGH-50RVX3-E LGH-65RVX3-E LGH-80RVX3-E LGH-100RVX3-E
Maximum current when operating [A] 0.57 0.81 1.37 1.76 2.37 3.23 3.77
* Make sure that the current leakage breaker is one compatible with higher harmonics.
* Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
* The use of an inadequate breaker can cause the incorrect operation of inverter.