Mitsubishi Electronics LGH-F-RX3-E User Manual
LGH-F-RX3-E
1. COMPARISON OF PRIMARY BUILDING VENTILATION METHODS ....................................................................ERV-2
2. LOSSNAY® PRINCIPLES.........................................................................................................................................ERV-2
2.1. LOSSNAY® ENERGY RECOVERY VENTILATIORS - CORE .........................................................................ERV-2
2.2. LOSSNAY® CONSTRUCTION ........................................................................................................................ERV-3
2.3. CALCULATION OF TOTAL ENERGY RECOVERY EFFICIENCY ..................................................................ERV-3
2.4. UNBALANCED AIRFLOW CORRECTION .....................................................................................................ERV-4
2.5. LOSSNAY® OPERATION / VENTILATION MODES ........................................................................................ERV-4
2.6. AUTOMATIC VENTILATION SWITCHING - BYPASS DAMPER OPERATION ..............................................ERV-5
2.7. IMPORTANCE OF FILTERS ...........................................................................................................................ERV-5
2.8. ENERGY RECOVERY VENTILATION TERMINOLOGY ................................................................................ERV-7
3. LOSSNAY® MODELS AND SPECIFICATIONS ........................................................................................................ERV-8
LGH-F300RX3-E .......................................................................................................................................................ERV-8
LGH-F470RX3-E .....................................................................................................................................................ERV-10
LGH-F600RX
LGH-F1200RX3-E ...................................................................................................................................................ERV-14
4. WIRING DIAGRAMS ..............................................................................................................................................ERV-16
5. SOUND ANALYSIS ................................................................................................................................................ERV-18
5.1. SOUND ANALYSIS .......................................................................................................................................ERV-18
5.2. LGH-F-RX3-E NC CURVES ..........................................................................................................................ERV-18
6. FAN SPEED CONTROL CONSIDERATIONS........................................................................................................ERV-20
7. INSTALLATION ......................................................................................................................................................ERV-20
7.1. INSTALLATION DIAGRAMS .........................................................................................................................ERV-20
7.2. ALTERNATE INSTALLATION FOR LOSSNAY® ............................................................................................ERV-21
7.3. SELECTING DUCT ATTACHMENT DIRECTION .........................................................................................ERV-22
7.4. INSTALLATION OF SUPPLEMENTARY FAN DEVICES AFTER LOSSNAY® UNIT .....................................ERV-23
8. ELECTRICAL INSTALLATION ...............................................................................................................................ERV-23
9. SYSTEM CONTROL EXAMPLES ..........................................................................................................................ERV-24
3-E .....................................................................................................................................................ERV-12
Lossnay ERV
LGH-F-RX3-E
Performance Certied
to ARI 1060 Standard
ERV-1LGH-F-RX3-E (Feb. 2009)
1. COMPARISON OF PRIMARY BUILDING VENTILATION METHODS
There are two main ventilation methods:
LGH-F-RX3-E
Centralized Ventilation Method
This is mainly used in large buildings, with the outside air
intake being installed in one machine room. For this method,
primary treatment of the outside air, such as energy recovery
and dust removal, is performed before distribution to the build-
ing duct system.
Exhaust
Supply fan
Each unit
Air exhaust
(stale air)
Air intake
(outside air)
Filters
Lossnay
®
Independent Zoned Ventilation Method
This is mainly used in small to medium-sized buildings,
with areas being ventilated using outside air intakes from
independent ventilation devices. The rate of use of this
method has recently increased as zone conditioning and
independent control have become more feasible.
System operation with celiling cassette (recessed) air conditioner
Ceiling-cassette package air
conditioner or fan coil unit
Exhaust grill
System operation with ducted air conditioner
Ceiling-embedded-type package
air conditioner or fan coil unit
Exhaust grill
Independent operation with ceiling-suspended air conditioner
Ceiling-cassette or ceiling-suspended-type
package air conditioner or fan coil unit
Ceiling-mounted-type Lossnay or
ceiling-embedded-type Lossnay
Ceiling-recessed-type
Lossnay
Finished ceiling
Ceiling-recessedtype Lossnay
Finished ceiling
Finished ceiling
®
unit
Exhaust air
Outside air
®
Exhaust air
Outside air
Outside air
Exhaust air
®
2. LOSSNAY® PRINCIPLES
2.1. Lossnay® Energy Recovery Ventilators – Core
The sophisticated energy recovery technology of the LOSSNAY® core is constructed from a specially treated cellulose membrane
separating cross-flow air passages with a corrugated structure for strength and durability. See below, right for an illustration of the
LOSSNAY® core.
41°F (5.2°C)
32°F (0°C)
Fresh cool air (outdoor)
Stale hot air (exhaust)
68°F (20°C)
Stale warm air (indoor air)
59°F (14.8°C)
Fresh warm air (indoor supply air)
Stale air exhaust
(dirty indoor air)
Fresh air induction
(fresh air)
CITY MULTI® can integrate LOSSNAY® ERVs into the air conditioning system, providing the best overall solution to ventilation
and air-conditioning.
Outdoor unit
Fresh air exhaust
(fresh heating/cooling air)
Stale air induction
(dirty heating/cooling air)
Centralized Controller
AG-150A
ERV-2
CENTRALIZED CONTROLLER AG-150A
Remote controller
Indoor unit Indoor unit
®
Lossnay
®
LOSSNAY Remote controller PZ-52SF-E
Performance Certied
to ARI 1060 Standard
LGH-F-RX3-E (Feb. 2009)
The sophisticated energy recovery technology of the LOSSNAY® core is constructed from a specially treated cellulose membrane
separating cross-flow air passages with a corrugated structure for strength and durability. See below, right for an illustration of the
LOSSNAY® core.
CITY MULTI® can integrate LOSSNAY® ERVs into the air conditioning system, providing the best overall solution to ventilation
and air-conditioning.
Lineup of LOSSNAY
Outdoor unit
Remote controller
Indoor unit Indoor unit
Lossnay
®
32°F (0°C)
Fresh cool air (outdoor)
41°F (5.2°C)
Stale hot air (exhaust)
59°F (14.8°C)
Fresh warm air (indoor supply air)
68°F (20°C)
Stale warm air (indoor air)
Stale air exhaust
(dirty indoor air)
Fresh air exhaust
(fresh heating/cooling air)
Stale air induction
(dirty heating/cooling air)
Fresh air induction
(fresh air)
LOSSNAY Remote controller PZ-52SF-E
®
Centralized Controller
AG-150A
CENTRALIZED CONTROLLER AG-150A
®
ERV units
LGH-F300RX3-E 300 cfm 1-phase, 208/230V, 60Hz
LGH-F470RX3-E 470 cfm 1-phase, 208/230V, 60Hz
LGH-F600RX3-E 600 cfm 1-phase, 208/230V, 60Hz
LGH-F1200RX3-E 1200 cfm 1-phase, 208/230V, 60Hz
Lossnay ERV
LGH-F-RX3-E
2.2. Lossnay® Construction
Lossnay® ERVs are constructed so that the exhaust
air passage from the indoor side to the outdoor
side (RA EA) and the outside air passage from
the outdoor side to the indoor side (OA
cross. The Lossnay
the Lossnay® Core, which is installed at this cross
point and recovers the heat by conduction through
the separating medium between the airows,
and latent energy by molecular transfer through
the separation plate driven by vapor pressure
differential between the airstreams. This enables
the total energy loss during exhaust to be greatly
reduced.
2.3. Calculation of Total Energy Recovery Efficiency
The Lossnay
1. Temperature (sensible heat) recovery efciency
2. Humidity (latent heat) recovery efciency
3. Enthalpy (total heat) recovery efciency
The energy recovery effect can be calculated if two of the
above efciencies are known. (Lossnay® performance and
cost analysis can also be determined using Mitsubishi Electric
ERValue® software.
• Each recovery efciency can be calculated with the formulas
in the table.
• When the supply and exhaust air volumes are equal, the
heat recovery efciencies on the supply and exhaust sides
are the same.
• When the supply and exhaust air volumes are not equal, the
total heat recovery efciency is low if the exhaust volume is
lower, and high if the exhaust volume is higher.
®
energy recovery unit features
®
Core’s energy recovery efciency can be considered using the following three transfer rates:
SA)
Item Formula
Temperature recovery
efficiency (%)
Enthalpy recovery
efficiency (%)
OA - tSA
t
= x 100
t
[]
tOA - tRA
OA - iSA
i
= x 100
i
iOA - iRA
[]
= Efficiency (%)
t = Dry Bulb
Temperature (°F)
i = Enthalpy (Btu/lb)
SA
(Supply air diffuser)
Supply fan
RA
(Return air)
Exhaust side filter
Note: The duct inlet and outlet are arranged in-line
in the actual product.
SA = Supply Air; RA = Return Air
EA = Exhaust Air; OA = Outside Air
OUTDOORS
EA
Stale indoor
air exhaust
Transmission
plates
Outside air intake
OA
®
Lossnay
Core
ERV
Intake side filter
INDOORS
EA
(Exhaust air)
Exhaust fan
OA
(Outside air)
SA
Supply
preconditioned
outside air to
AC system
Partition plates
Return stale indoor
air
RA
Performance Certied
to ARI 1060 Standard
ERV-3LGH-F-RX3-E (Feb. 2009)
Calculation of Supply Air Condition After Passing Through Lossnay
If the Lossnay energy recovery efciency and the conditions
of the room and outdoor air are known, the conditions of the
LGH-F-RX3-E
air entering the room and the air exhausted outdoors can be
determined with the following formulas in the table.
Temperature t
Enthalpy i
Supply side Exhaust side
SA = tOA - (tOA- tRA) x ttEA = tRA + (tOA - tRA ) x t
SA = iOA - (iOA - iRA ) x iiEA = iRA + (iOA - iRA ) x i
2.4. Unbalanced Airow Correction
In unbalanced applications, it is necessary to calculate the pressure
drops of the two air streams separately using the applicable chart
and correct the efciencies using the instructions and the K-Factor
chart below.
1. In unbalanced airow applications, the external
static pressure must be calculated for each air stream
separately using the ESP curves for the applicable
product.
2. The temperature effectiveness must also be
corrected using the K-Factor chart (at right).
A. Determine which correction factor to use by
calculating the K-Factor (Air Volume Ratio).
B. Determine the balanced airow effectiveness
from the applicable product graphs using the outside
airow (CFM).
C. Correct the effectiveness for the unbalanced
airow by nding the Original Exchange Balanced
Efciency (%), then nd the appropriate K-Factor
Curve in the chart. From that point, read the
Corrected Exchange Efciency (%) on the left side of
the chart.
Energy Recovery Efficiency Correction Curve
Energy Recovery
Efficiency (%)
100
(K-Factor)
®
(K-Factor)
1.4
1.3
1.2
1.1
1.0
0.9
0.8
Corrected Exchange Efficiency (%)
2.5. Lossnay® Operation / Ventilation Modes
1. Energy Recovery — Heat Exchange
Lossnay® technology is a full enthalpic energy exchange that recovers both
sensible energy or “heat recovery” and latent energy or “moisture transfer”
between air streams.
2. Bypass — No Exchange
0.7
0.6
0.5
Original Exchange Balanced Efficiency (%)
3. Automatic — Heat Exchange: Bypass
• In cooling, the automatic mode
accomplishes an energy savings function.
When the inbound outside air is ≥7.2º F
cooler than the outbound exhaust air, the
bypass damper opens in the outbound
airstream. This increases airflow and
provides cooler air to the conditioned
space.
• In heating, the automatic mode
may not be suitable without supply-air
preheating.
ERV-4
LGH-F-RX3-E (Feb. 2009)
Performance Certied
to ARI 1060 Standard
2.6. Automatic Ventilation Switching - Bypass Damper Operation
Effect of Automatic Ventilation Mode
The automatic damper mode automatically provides the correct ventilation for the conditions in the room. It eliminates the need for manual switch
operations when setting the Lossnay ventilator to “bypass” ventilation. The following shows the effect “bypass” ventilation will have under various
conditions. For automatic operation, when the air conditioning system is in the cooling mode, the bypass damper will open if the entering outside
air temperature is 7.2°F or more lower than the exhaust air temperature.
(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),
bypass ventilation will draw in the cooler outside air and reduce the cooling load on the system.
(2) Cooling using outdoor air--During cooler season (such as between spring and summer or between summer and fall), if the people in a room
cause the temperature of the room to rise, bypass ventilation will draw in the cool outside air and use it to cool the room.
(3) Night purge--Bypass ventilation can be used to release hot air from inside the building that has accumulated during the hot summer season.
(4) Office equipment room cooling--During the cold season, outdoor air can be drawn in to cool rooms where the temperature has risen due to the
use of office equipment. (Only when interlocked with CITY MULTI
®
and Mr. Slim® indoor units.)
2.7. Importance of Filters
2.7.1. Data Regar
ding Dust
Table 1 Aerosol particle diameters and applicable ranges of various filters
Table 2 Major dust concentrations
Type Reference data
Remarks:
Lossnay ERV
LGH-F-RX3-E
Performance Certied
to ARI 1060 Standard
ERV-5LGH-F-RX3-E (Feb. 2009)
2.72. Calculation Table for Dust Collection Efficiency of each Lossnay
®
Filter
LGH-F-RX3-E
Dust
Size
MERV
Rating
(µm)*
6; 3.0-10.0 µm
6.6-8.6
less than 49.9%
* Note: MERV rating is estimation from efficiency test data of AFI Gravitational method and ASHRAE Colorimetric method.
2.7.3. Pressure Loss
The pressure loss of the filter used within the Lossnay® units is shown below, expressed in terms of collection ratio (%).
ERV-6
LGH-F-RX3-E (Feb. 2009)
Performance Certied
to ARI 1060 Standard
200 ms or more
2.8. Energy Recovery Ventilation Terminology
Lossnay ERV
LGH-F-RX3-E
Balanced Ventilation
A ventiliation strategy using both an exhaust air
blower and a supply or make-up air blower provid-
ing the same airow and pressure so as not to
pressurize or depressurize a building.
CFM
Cubic Feet per Minute, a measure of air volume.
Delayed Operation
®
The On/Off operation of the Lossnay
unit can
be delayed for 30 minutes following the opera-
tion of the indoor unit. When using PZ-41SLB-E,
the delay can be set for 10, 20, 30, 40, 50 and 60
minutes.
ESP
External static pressure, available motive force
to propel air in a duct system from a blower or
ventilator.
Enthalpy Exchange
The exchange of both sensible and latent heat
energy.
Exhaust Air (EA)
Air expelled from indoor space.
External Control Input
An On/Off input signal for operating the Lossnay
®
unit that can be sent from an external device. The
signal may be a 12V-24V DC or an uncharged
a-contact signal.
Interlocked Lossnay
Lossnay
®
unit linked to CITY MULTI® or Mr. Slim®
®
indoor units that receive signals and operates via
the indoor unit’s remote controller.
Non-interlocked Lossnay
®
Lossnay unit controlled independently of
®
CITY MULTI
Lossnay
or Mr. Slim® indoor units by the
®
remote controller and/or centralized
controller.
Outdoor Air (OA)
Air drawn from outdoors - ventilation air.
Pulse Input
When the control signal
from an external device
outputs a pulse such as
the one shown at right,
the pulse input control
®
is performed by the Lossnay
unit. (Optional DIP
switch 2-2 ON) 200 ms or more.
Remote Operation
This is used for enabling/disabling the On/Off con-
trol signal from an external device and for setting
interlocked operation of the external device and the
Lossnay unit.
ON/OFF interlock: Enables both ON OFF and
OFF ON external signals.
ON interlock: Enables OFF ON external signal.
Disables ON OFF external signal.
OFF interlock: Enables ON OFF external sig-
nal. Disables OFF ON external signal.
External priority: Same as on/off interlock but the
OFF signal from the remote controller is ignored
when the external control signal is on.
Return Air (RA)
Air drawn from indoor space.
Supply Air (SA)
Air supplied to indoor space.
Ventilation Modes
Energy Recovery – energy exchange through
Lossnay® core at all times.
Bypass – no exchange – bypass damper open.
Automatic – energy exchange or bypass as
determined by present temperature sensor in inlet
and discharge airstreams.
Performance Certied
to ARI 1060 Standard
ERV-7LGH-F-RX3-E (Feb. 2009)
3. LOSSNAY® MODELS AND SPECIFICATIONS
Model LGH-F300RX3-E Specifications Table
Position where duct direction change is possible
Model specifications and materials list for Lossnay
LGH-F-RX3-E
Model LGH-F300RX3-E
®
units
D
opening
A
®
core)
Air lters
Damper plate
Ceiling suspension xture
RA
(return air)
SA
(supply air)
7/8" E
Air supply fan
Control box
Maintenance cover
3-1/8"3-1/8"
G
H
C
K
Air exhaust fan
EA
(exhaust air)
J
B
OA
(outside air)
Maintenance space for
heat exchanger, air
lters,and fans
Ceiling suspension xture
Dimensions Ceiling suspension Nominal Duct connecting Duct pitch
Unit fixture pitch diameter flange Weight
A B C D E F
K
Inspection
23-5/8" or more
5-7/8" ~ 9-13/16"
Energy exchanger (Lossnay
K
G H J K
inches 34-15/16 40 12-1/2 31-1/8 41-1/4 1-9/16 ø8 ø7-9/16 ø8-3/16 29-5/16 4-7/8 73 lb
mm 888 1016 318 791 1048 40 ø203 ø192 ø208 745 124 33 kg
F
ERV-8
LGH-F-RX3-E (Feb. 2009)
Performance Certied
to ARI 1060 Standard
Model LGH-F300RX3-E Characteristic Curve
* Attention
1. The defrost mode must be operated at 14°F or below.
2. The current, power consumption, and efficiency are based on the above air flow rate.
3. The sound at the air outlets are the values at a 45° angle, 59 in. in front of the unit.
4. Fan speed can be switched between high and low.
The main unit switch must be used to select the extra-high fan speed.
5. Air conditions as per ARI standard 1060-2005.
*Specifications may be subject to change without notice.
Lossnay ERV
LGH-F-RX3-E
Performance Certied
to ARI 1060 Standard
ERV-9LGH-F-RX3-E (Feb. 2009)
Model LGH-F470RX3-E
Model LGH-F470RX3-E Specifications Table
LGH-F-RX3-E
(149 mm)
Air exhaust fan
5-7/8”
Position where duct direction change is possible
D
Ceiling suspension xture
EA
(exhaust air)
B
J
(149-249 mm)
OA
(outside air)
Maintenance space for
heat exchanger, air
lters, and fans
Energy exchanger
®
(Lossnay
core)
Ceiling suspension xture
Dimensions Ceiling suspension Nominal Duct connecting Duct pitch
Unit fixture pitch diameter flange Weight
A B C D E F
(149-249 mm)
5-7/8" ~ 9-13/16"
K
Inspection
opening
23-5/8" or more
A
5-7/8”
(149 mm)
Air lters
G H J K
RA
(return air)
Damper plate
E
SA
(supply air)
7/8”
(22 mm)
Air supply fan
Control box
Maintenance cover
3-1/8”3-1/8”
(79 mm)(79 mm)
G
H
inches 45-13/16 39-1/2 15-11/16 40-9/16 40-13/16 3/8 ø10 ø9-1/2 ø10-3/16 27-3/16 5-7/8 143 lb
mm 1164 1003 398 1030 1037 9.5 ø254 ø241 ø259 691 149 65 kg
3-9/16”
(90 mm)
F
C
ERV-10
LGH-F-RX3-E (Feb. 2009)
Performance Certied
to ARI 1060 Standard
Model LGH-F470RX3-E
* Attention
1. The defrost mode must be operated at 14°F or below.
2. The current, power consumption, and efficiency are based on the above air flow rate.
3. The sound at the air outlets are the values at a 45° angle, 59 in. in front of the unit.
4. Fan speed can be switched between high and low.
The main unit switch must be used to select the extra-high fan speed.
5. Air conditions as per ARI standard 1060-2005.
*Specifications may be subject to change without notice.
Model LGH-F470RX3-E Characteristic Curve
Lossnay ERV
LGH-F-RX3-E
Performance Certied
to ARI 1060 Standard
ERV-11LGH-F-RX3-E (Feb. 2009)
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