Fujitsu UTZ-BD035B User manual

DTO_ERV002E_01
2013.04.26
DESIGN & TECHNICAL MANUAL
UTZ-BD025B
UTZ-BD035B
UTZ-BD050B
UTZ-BD080B
UTZ-BD100B
ENERGY RECOVERY VENTILATORS

CONTENTS
1. SPECIFICATIONS
1-1. SPECIFICATIONS ........................................................................ 01-01
2. DIMENTIONS
2-1. UTZ-BD025B ................................................................................ 01-03
2-2. UTZ-BD035B ................................................................................ 01-05
2-3. UTZ-BD050B ................................................................................ 01-07
2-4. UTZ-BD080B ................................................................................ 01-09
2-5. UTZ-BD100B .................................................................................01-11
3. WIRING DIAGRAMS
3-1. UTZ-BD025B ................................................................................ 01-13
3-2. UTZ-BD035B, UTZ-BD050B ........................................................ 01-13
3-3. UTZ-BD080B, UTZ-BD100B ........................................................ 01-14
3-4. INTERLOCKED CONNECTION TO AIR CONDITIONER............ 01-15

4. DESIGN SECTION
4-1. ABOUT HEAT EXCHANGE UNIT ................................................ 01-17
4-1-1. BASIC ENGIN......................................................................................... 01-17
4-1-2. INTERNAL STRUCTURE .......................................................................01-18
4-1-3. HEAT EXCHANGE VENTILATION AND NORMAL VENTILATION....... 01-19
4-2. NEEDS FOR VENTILATION......................................................... 01-20
4-2-1. OBJECTIVES AND EFFECTS OF VENTILATION................................. 01-20
4-3. METHODS OF VENTILATION...................................................... 01-21
4-4. DESIGN PRECAUTIONS ............................................................. 01-22
4-4-1. CAUTION ON SAFETY........................................................................... 01-22
4-4-2. INSPECTION OPENING AND INSTALLATION MODELS ..................... 01-23
4-4-3. USE ENVIRONMENTS ........................................................................... 01-24
4-4-4. HEAT EXCHANGE EFFICIENCY ...........................................................01-25
4-4-5. DUST COLLECTION EFFICIENCY........................................................ 01-27
4-4-6. NOISE ..................................................................................................... 01-28
4-4-7. NOISE CONTROL................................................................................... 01-29
4-5. VENTILATION DESIGN................................................................ 01-31
4-5-1. QUANTITY, DYNAMIC PRESSURE / STATIC PRESSURE .................... 01-31
4-5-2. HOW TO CALCULATE REQUIRED VENTILATION VOLUME.................01-32
4-6. DUCT DESIGN.............................................................................. 01-33
4-6-1. CALCULATION OF PRESSURE LOSSES DUE TO VENTILATION
THROUGH DUCT .................................................................................... 01-33

- (01-01) -
1. SPECIFICATIONS
1-1. SPECIFICATIONS
Model No.
Item UTZ-BD025B
Power Source 220–240V~ 50Hz
Ventilation Mode Heat Exchange Ventilation Normal Ventilation
Notch (Extra high) High Low (Extra high) High Low
Input (W) 112-128 108-123 87-96 112-128 108-123 87-96
Air Volume (m3/h) 250 250 190 250 250 190
External Static Pressure (Pa) 105 95 45 105 95 45
Sound Pressure Level (dB) 30.0-31.5 29.5-30.5 23.5-26.5 30.0-31.5 29.5-30.5 23.5-26.5
Temperature Exchange
Efciency (%) 75 75 77 — — —
Dimensions (mm)
(H x W x D)
Net 270 x 882 x 599
Gross 349 x 1132 x 795
Weight (kg) Net 29
Gross 35
Outlet Duct Diameter (mm) 150
Operation Range (°C) -10 to 40
Maximum Humidity (%) 85
Model No.
Item UTZ-BD035B
Power Source 220–240V~ 50Hz
Ventilation Mode Heat Exchange Ventilation Normal Ventilation
Notch (Extra high) High Low (Extra high) High Low
Input (W) 182-190 178-185 168-175 182-190 178-185 168-175
Air Volume (m3/h) 350 350 240 350 350 240
External Static Pressure (Pa) 140 60 45 140 60 45
Sound Pressure Level (dB) 32.5-33.0 30.5-31.0 22.5-25.5 32.5-33.0 30.5-31.0 22.5-25.5
Temperature Exchange
Efciency (%) 75 75 78 — — —
Dimensions (mm)
(H x W x D)
Net 317 x 1050 x 804
Gross 396 x 1250 x 1000
Weight (kg) Net 49
Gross 57
Outlet Duct Diameter (mm) 150
Operation Range (°C) -10 to 40
Maximum Humidity (%) 85
Model No.
Item UTZ-BD050B
Power Source 220–240V~ 50Hz
Ventilation Mode Heat Exchange Ventilation Normal Ventilation
Notch (Extra high) High Low (Extra high) High Low
Input (W) 263-289 204-225 165-185 263-289 204-225 165-185
Air Volume (m3/h) 500 500 440 500 500 440
External Static Pressure (Pa) 120 60 35 120 60 35
Sound Pressure Level (dB) 36.5-37.5 34.5-35.5 31.0-32.5 36.5-37.5 34.5-35.5 31.0-32.5
Temperature Exchange
Efciency (%) 75 75 76 — — —
Dimensions (mm)
(H x W x D)
Net 317 x 1090 x 904
Gross 396 x 1290 x 1100
Weight (kg) Net 57
Gross 66
Outlet Duct Diameter (mm) 200
Operation Range (°C) -10 to 40
Maximum Humidity (%) 85

- (01-02) -
Model No.
Item UTZ-BD080B
Power Source 220–240V~ 50Hz
Ventilation Mode Heat Exchange Ventilation Normal Ventilation
Notch (Extra high) High Low (Extra high) High Low
Input (W) 387-418 360-378 293-295 387-418 360-378 293-295
Air Volume (m3/h) 800 800 630 800 800 630
External Static Pressure (Pa) 140 110 55 140 110 55
Sound Pressure Level (dB) 37.0-37.5 36.5-37.0 33.5-34.5 37.0-37.5 36.5-37.0 33.5-34.5
Temperature Exchange
Efciency (%) 75 75 76 — — —
Dimensions (mm)
(H x W x D)
Net 388 x 1322 x 884
Gross 467 x 1552 x 1170
Weight (kg) Net 71
Gross 82
Outlet Duct Diameter (mm) 250
Operation Range (°C) -10 to 40
Maximum Humidity (%) 85
Model No.
Item UTZ-BD100B
Power Source 220–240V~ 50Hz
Ventilation Mode Heat Exchange Ventilation Normal Ventilation
Notch (Extra high) High Low (Extra high) High Low
Input (W) 437-464 416-432 301-311 437-464 416-432 301-311
Air Volume (m3/h) 1000 1000 700 1000 1000 700
External Static Pressure (Pa) 105 80 75 105 80 75
Sound Pressure Level (dB) 37.5-38.5 37.0-37.5 33.5-34.5 39.5-40.5 39.0-39.5 35.5-36.5
Temperature Exchange
Efciency (%) 75 75 76 — — —
Dimensions (mm)
(H x W x D)
Net 388 x 1322 x 1134
Gross 467 x 1552 x 1420
Weight (kg) Net 83
Gross 98
Outlet Duct Diameter (mm) 250
Operation Range (°C) -10 to 40
Maximum Humidity (%) 85
(Note) This noise of the product is the value which was measured at the acoustic room.
Actually, in the established condition, that undergo inuence by the echoing of the room and so that become bigger
than the display numerical value.

- (01-03) -
2. DIMENTIONS
2-1. UTZ-BD025B
NO. Parts Name Qty. Material Remarks
1 Frame 1 Galvanized sheets
2 Adapter 4 ABS
3 Electrical Equipment Box 1
4 Inspection Cover 1 Galvanized sheets
5 Fan 2 ABS
6 Motor 2
7 Heat Exchange Element 1 Special paper + Resin
8 Filter 2 Nylon-Polyester Fiber Collection Efciency AFI 82%
9 Damper 1
10 Damper Motor 1
11 Ceiling Suspension Fixture 4 Galvanized sheets

BE CAREFUL OF DEWING AND
FROSTING
As shown in the Figure, suppose a high temp absorbing air condition
A and a low temp absorbing air condition B are plotted on the air line
gure, then a high temp air A is heat-exchanged by the unit and goes
out of the saturation curve as shown by Point C.
In this case, the unit will be dewed or frosted.
To aboid this, you are required to heat a low temp air B up to B’ so as
to get C’ below the saturation curve, before using the unit.
saturationcurve
Dry-bulb temperature(˚C)
Absolite humidity (kg/kg’)
C’
C
BB’
A

REFERENCE SKETCH
Pipe Hood
Outside Intake Duct
Ceilling Suspension Bolts
Supply Air Duct
EA
(Exhaust
Air)
OA
(Outside intake Air)
RA
(Room Air)
SA
(Supply Air)
Inside Supply Opening
(Supply/Exhaust Air Grill)
Room Intake Opening
(Supply/Exhaust Air Grill)
Room Intake Duct
Heat Insulation Material
Exhaust Air Duct
The two outside ducts(the Outside Intake Duct and the
Exhaust Duct)must be insulated to prevent condensation.
(Material; Glass wool, Thickness; 25)
 Duct size (Nominal Diameter): ø150
 The above dimensions do not include the thickness of
the insulasion material on the unit body.
② ⑤ ⑥ ⑩ ⑨
①⑦⑪
599600
142 315 142
EA
OA
(Exhaust Air)
(Outside Air)
810
Maintenance Space
Inspection Opening □450
(For the inspection of the lters, heat exchange elements, fans, motors, and damper)
4-13×30 Oval hole · Suspension Fittings
1965519
RA
SA
(Room Air)
(Supply Air)
An inspection opening is necessary to
clean the heat exchange element and
lter once or twice a year.
270
247
159
135
12
80
④
⑧
③
882
414
95
95
Wiring Diagram
Earth Terminal
Ø219 Ø164 Ø144
67
157

- (01-04) -

SPECIFICATIONS
Model
No.
Power
Source Notch Frequency
Heat Exchange Ventilation Normal Ventilation
Product
Weight
Input Current Air
Volume
External
Static
Pressure
Temperature
Exchange
Efciency
Enthalpy
Exchange
Efciency (%)
Noise Input Current Air
Volume
External
Static
Pressure
Noise
(Hz) (W) (A) (m3/h) (Pa) (%) Cooling Heating (dB) (W) (A) (m3/h) (Pa) (dB) (kg)
UTZ-
BD025B
220-240V
a.c.
Extra High
50 112-128 0.51-0.53 250 105 75 63 70 30.0-31.5 112-128 0.51-0.53 250 105 30.0-31.5
29
High
50 108-123 0.49-0.51 250 95 75 63 70 29.5-30.5 108-123 0.49-0.51 250 95 29.5-30.5
Low
50 87-96 0.40-0.41 190 45 77 65 72 23.5-26.5 87-96 0.40-0.41 190 45 23.5-26.5
 This noise of the product is the value which was measured at the acoustic room. Actually, in the established condition, that undergo inuence
by the echoing of the room and so that become bigger than the display numerical value .

PERFORMANCE
Use conditions
Outdoor air conditions
Temperature range -10˚C ~ 40˚C
Relative humidity 85% or less
Indoor air conditions
Temperature range -10˚C ~ 40˚C
Relative humidity 85% or less
Installation requirements
Same as the indoor air conditions
*
Indoor air here means air in air-conditioned
living rooms.
Its use in refrigerators or other places
where temperature can uctuate greatly is
prohibited even if a temperature range is
acceptable.
Example Indoor air conditions
During cooling period
Temperature 27˚C
Relative humidity 50%
During heating period
Temperature 20˚C
Relative humidity 40%
• The Input, the current and the exchange
efficiency are values at the time of the
mentioned air volume.
• The noise level shall be measured 1.5m
below the center of the unit.
• The temperature exchange efficiency
averages that of when cooling and when
heating.

MOTOR
SPECIFICATIONS
Type 4 Poles open type
induction motor
Rating Cont.
Insulation Class class E
Temperature Rise under 75 K
Sorrounding Temperature -10˚C ~ 40˚C
Insulation Resistance over 1MΩ (by DC500V)
Withstand Voltage AC 1,500V for 1min
300
0 50 100 150 200 250 300 350
50
100
150
200
250
0 20 40 60 80 100 120 140 160 180 200 220
Air Volume (m3/h)
Air Volume (ft3/min)
External Static Pressure (Pa)
80
50
60
70
Exchange Efciency (%)
Duct resistance Curve
P-Q Curve
220 - 240V ~ 50HzEfciency Curve
T
e
m
pe
ra
t
u
r
e
E
nt
h
al
p
y
(i
n
h
e
a
t
i
n
g
)
E
nt
h
al
p
y
(i
n
c
o
o
li
n
g
)
Extra High
Equivalent pipe length
High
Low  When friction coefcient of pipe (duct) : =0.02
100m
80
60
20
40

- (01-05) -
2-2. UTZ-BD035B
NO. Parts Name Qty. Material Remarks
1 Frame 1 Galvanized sheets
2 Adapter 4 ABS
3 Electrical Equipment Box 1
4 Inspection Cover 1 Galvanized sheets
5 Fan 2 ABS
6 Motor 2
7 Heat Exchange Element 2 Special paper + Resin
8 Filter 2 Nylon-Polyester Fiber Collection Efciency AFI 82%
9 Damper 1
10 Damper Motor 1
11 Ceiling Suspension Fixture 4 Galvanized sheets

BE CAREFUL OF DEWING AND
FROSTING
As shown in the Figure, suppose a high temp absorbing air condition
A and a low temp absorbing air condition B are plotted on the air line
gure, then a high temp air A is heat-exchanged by the unit and goes
out of the saturation curve as shown by Point C.
In this case, the unit will be dewed or frosted.
To aboid this, you are required to heat a low temp air B up to B’ so as
to get C’ below the saturation curve, before using the unit.
saturationcurve
Dry-bulb temperature(˚C)
Absolite humidity (kg/kg’)
C’
C
BB’
A

REFERENCE SKETCH
Pipe Hood
Outside Intake Duct
Ceilling Suspension Bolts
Supply Air Duct
EA
(Exhaust
Air)
OA
(Outside intake Air)
RA
(Room Air)
SA
(Supply Air)
Inside Supply Opening
(Supply/Exhaust Air Grill)
Room Intake Opening
(Supply/Exhaust Air Grill)
Room Intake Duct
Heat Insulation Material
Exhaust Air Duct
The two outside ducts(the Outside Intake Duct and the
Exhaust Duct)must be insulated to prevent condensation.
(Material;Glass wool, Thickness;25)
Duct size (Nominal Diameter): ø150
 The above dimensions do not include the thickness of
the insulasion material on the unit body.
978
② ⑤ ⑥ ⑩⑨
①⑦⑪
804600
112 580 112
EA
OA
(Exhaust Air)
(Outside Air)
Maintenance Space Inspection Opening □450
(For the inspection of the lters, heat exchange elements, fans, motors, and damper)
4-13×30 Oval hole · Suspension Fittings
1986019
RA
SA
(Room Air)
(Supply Air)
An inspection opening is necessary to
clean the heat exchange element and
lter once or twice a year.
317
247
182
159
35
80
④
⑧
③
1050
470
70
70
Wiring Diagram
Earth Terminal
Ø162 Ø144
122
157

- (01-06) -

SPECIFICATIONS
Model
No.
Power
Source Notch Frequency
Heat Exchange Ventilation Normal Ventilation
Product
Weight
Input Current Air
Volume
External
Static
Pressure
Temperature
Exchange
Efciency
Enthalpy
Exchange
Efciency (%)
Noise Input Current Air
Volume
External
Static
Pressure
Noise
(Hz) (W) (A) (m3/h) (Pa) (%) Cooling Heating (dB) (W) (A) (m3/h) (Pa) (dB) (kg)
UTZ-
BD035B
220-240V
a.c.
Extra High
50 182-190 0.63-0.65 350 140 75 66 69 32.5-33.0 182-190 0.63-0.65 350 140 32.5-33.0
49
High
50 178-185 0.59-0.60 350 60 75 66 69 30.5-31.0 178-185 0.59-0.60 350 60 30.5-31.0
Low
50 168-175 0.56-0.57 240 45 78 71 73 22.5-25.5 168-175 0.56-0.57 240 45 22.5-25.5
 This noise of the product is the value which was measured at the acoustic room. Actually, in the established condition, that undergo inuence
by the echoing of the room and so that become bigger than the display numerical value .

PERFORMANCE
Use conditions
Outdoor air conditions
Temperature range -10˚C ~ 40˚C
Relative humidity 85% or less
Indoor air conditions
Temperature range -10˚C ~ 40˚C
Relative humidity 85% or less
Installation requirements
Same as the indoor air conditions
*
Indoor air here means air in air-conditioned
living rooms.
Its use in refrigerators or other places
where temperature can uctuate greatly is
prohibited even if a temperature range is
acceptable.
Example Indoor air conditions
During cooling period
Temperature 27˚C
Relative humidity 50%
During heating period
Temperature 20˚C
Relative humidity 40%
• The Input, the current and the exchange
efficiency are values at the time of the
mentioned air volume.
• The noise level shall be measured 1.5m
below the center of the unit.
• The temperature exchange efficiency
averages that of when cooling and when
heating.

MOTOR
SPECIFICATIONS
Type 4 Poles open type
induction motor
Rating Cont.
Insulation Class class E
Temperature Rise under 75 K
Sorrounding Temperature -10˚C ~ 40˚C
Insulation Resistance over 1MΩ (by DC500V)
Withstand Voltage AC 1,500V for 1min
350
0 100 200 300 400 500 600
50
100
150
200
300
0 50 100 150 200 250 300 350
Air Volume (m3/h)
Air Volume (ft3/min)
External Static Pressure (Pa)
80
50
60
70
Exchange Efciency (%)
Duct resistance Curve
P-Q Curve 220 - 240V ~ 50HzEfciency Curve
T
e
m
p
e
r
a
t
u
r
e
E
n
t
h
a
l
p
y
(
i
n
h
e
a
t
i
n
g
)
E
n
t
h
a
l
p
y
(
i
n
c
o
o
l
i
n
g
)
Extra High
Equivalent pipe length
High
Low
 When friction coefcient of pipe (duct) : =0.02
60m 40
20
250
10

- (01-07) -
2-3. UTZ-BD050B
NO. Parts Name Qty. Material Remarks
1 Frame 1 Galvanized sheets
2 Adapter 4 Galvanized sheets
3 Electrical Equipment Box 1
4 Inspection Cover 1 Galvanized sheets
5 Fan 2 ABS
6 Motor 2
7 Heat Exchange Element 2 Special paper + Resin
8 Filter 2 Nylon-Polyester Fiber Collection Efciency AFI 82%
9 Damper 1
10 Damper Motor 1
11 Ceiling Suspension Fixture 4 Galvanized sheets

BE CAREFUL OF DEWING AND
FROSTING
As shown in the Figure, suppose a high temp absorbing air condition
A and a low temp absorbing air condition B are plotted on the air line
gure, then a high temp air A is heat-exchanged by the unit and goes
out of the saturation curve as shown by Point C.
In this case, the unit will be dewed or frosted.
To aboid this, you are required to heat a low temp air B up to B’ so as
to get C’ below the saturation curve, before using the unit.
saturationcurve
Dry-bulb temperature(˚C)
Absolite humidity (kg/kg’)
C’
C
BB’
A

REFERENCE SKETCH
Pipe Hood
Outside Intake Duct
Ceilling Suspension Bolts
Supply Air Duct
EA
(Exhaust
Air)
OA
(Outside intake Air)
RA
(Room Air)
SA
(Supply Air)
Inside Supply Opening
(Supply/Exhaust Air Grill)
Room Intake Opening
(Supply/Exhaust Air Grill)
Room Intake Duct
Heat Insulation Material
Exhaust Air Duct
The two outside ducts(the Outside Intake Duct and the
Exhaust Duct)must be insulated to prevent condensation.
(Material;Glass wool, Thickness;25)
Duct size (Nominal Diameter): ø200
 The above dimensions do not include the thickness of
the insulasion material on the unit body.
②⑤⑥⑩⑨
①⑦⑪
904600
132 640 132
EA
OA
(Exhaust Air)
(Outside Air)
1018
Maintenance Space Inspection Opening □450
(For the inspection of the lters, heat exchange elements, fans, motors, and damper)
4-13×30 Oval hole · Suspension Fittings
1996019
RA
SA
(Room Air)
(Supply Air)
An inspection opening is necessary to
clean the heat exchange element and
lter once or twice a year.
317
159
182
247
35
80
④
⑧
③
1090
470
127
70
Wiring Diagram
Earth Terminal
Ø210 Ø194
157
70