M1218 Air Handler - The Unico System

Bulletin 20-18 / March 2011
M1218 Air Handler
FEATURES AND CONTROLS
The following table shows a comparison of the various
features.
Applications
The Unico System is a complete indoor comfort system
that includes an indoor fan coil unit and small duct
system. The fan coil unit and duct system were designed
to operate together to provide the proper airflow in every
installation. The conditioned air is supplied through a
series of two-inch diameter ducts as a stream of air that
entrains and mixes with the room air. This process of
aspiration produces a more even temperature distribution
in the room than a conventional system.
The Unico M1218 Fan Coil unit is a single packaged unit.
The cooling and heating coils are contained within the
same cabinet. The unit can be mounted in a verticalupflow or horizontal-flow configuration. The coils can be
combined as a heating-only, cooling-only, or heating and
cooling fan coil unit.
For cooling, the M1218 is designed for R-410A
refrigerant (both A/C and Heat Pump) or a chilled water
coil. For heating, the M1218 offers an optional hot water,
or you may use the installed heat pump coil or chilled
water coil (using hot water), or you may use an electric
heater (WON 0502 or WON 0752).
The M1218 is designed to deliver up to 350 CFM (0.17
m3/s) of air with a static pressure of 1.5 inches of water
(373 Pa). The minimum airflow for refrigerant systems is
200 CFM per nominal ton (27 L/s per nominal kW)
Cabinet Construction
The cabinet is fully insulated with closed cell insulation.
There is no exposed fiberglass inside the cabinet. The
cabinet is constructed of 22 gauge (0.7-mm) galvanized
steel with removable access panels on both sides for ease
of service. See Dimension drawing.
INT
ERTEK
CM
US
C
LISTED
CERTIFIED TO UL STD 1995
CONFORMS TO CAN/CSA STD
C22.2 NO. 236
Control Box Configuration
Balanced wheels
Direct drive motor
Shaft key connection
Recessed control panel
Control voltage transformer
Screw terminal connections
Heat pump AFS bypass
Boiler relay
Number of modes of operation
Adjustable low airflow mode
Efficient ventilation mode
Adjustable restrictor plate
Point-to-point wiring
Electric heater fan interlock
Electric heater stage 3 lockout protection
Chilled water relay
Air cycle feature
EAC, HRV, or ERV relay
Potable water circulation
Humidifier compatibility
UniChiller Leader/Follower control
Soft-start and Soft-stop
Constant airflow
Low airflow indicator
Preset airflow settings
Laptop configurable
Laptop troubleshooting
Optimized for zone damper systems
Optimized for efficiency and sound
STD
ACB
ECx







**

2












2

























6



















** with separate relay included in cooling module
Balanced wheels – All blower wheels are individually
balanced.
Direct drive motor – The wheel is mounted directly to the
motor shaft to improve drive efficiency and lower costs.
Shaft key – The wheel is attached to the motor shaft using
a square keyway which is more secure than a simple set
screws.
Recessed control panel – The control panel is recessed in
the cabinet on the connection side. Knockouts are
available for incoming power. All control panels include
the following features:
Control voltage transformer – a 50VA 24-volt
transformer which provides control voltage power to
the thermostat, electric heaters, and other optional
equipment.
81037
© Copyright 2011 Unico, Inc.
Bulletin 20-18 — Page 2
Screw terminal connections – terminal blocks with
large screws and wire washers to securely connect the
control wires.
as part of a domestic water system to prevent the
formation of stagnant water.
Heat pump AFS bypass – removes the anti-frost switch
(AFS) from the circuit during heat pump heating mode
which eliminates nuisance shutdowns during defrost
mode.
Humidifier compatibility (ACB and EC) – The control
board includes the ability to connect a humidistat and a
humidifier so that the humidistat turns on the humidifier
when needed. The user may choose whether the fan with
humidifier operates at high or low HEAT airflow setting.
Boiler relay (ACB, EC) – The ACB and SCB includes a
separate dry-contact relay to turn on the boiler, boiler
pump, or hot water coil valve. (The STD control box
includes room for a relay to be added.)
UniChiller Leader/Follower control (ACB and EC) – The
control allows one air handler to be set the UniChiller
mode of operation as the ‘Leader’ with all other air
handlers dependent (‘Follower’).
Modes of operation – Both the STD and ACB controls
allow for high and for low airflow modes. The EC control
has 6 modes (FAN-ONLY, LOW-COOL, HIGH-COOL,
LOW-HEAT, HIGH-HEAT, and EMERGENCY HEAT).
The STD control allows the user to adjust the low airflow
amount but is not very efficient. The EC control allows
adjustability for every mode maintaining high efficiency.
The ACB cannot be adjusted but provides high efficiency
ventilation.
Soft-start and soft-stop (ACB and EC) – For quieter
operation, the unit will slowly ramp the motor from stop
to full speed, and vice versa.
Adjustable restrictor plate (STD, ACB models only) – The
patented restrictor plate provides a low cost solution to
finely adjust the airflow using a single or two-speed
motor. The movable restrictor plate is accessible from the
exterior of the front of the unit even with the duct
installed.
Point-to-point wiring (ACB and EC) – The control boards
have separate terminals for the thermostat, electric heater,
outdoor condenser, and other options for easy wiring and
troubleshooting.
Electric heater stage 3 lockout (ACB and EC) – The
control board includes a lockout feature to prevent the
third stage of the electric heater from turning on if the
heat pump is also on. This prevents nuisance shutdowns
from overheating the electric heater. This feature is
available with the STD control box by using an outside
thermostat.
Chiller relay (ACB and EC )– The control box includes a
separate dry-contact relay (ColdW) to turn on a chiller or
zone pump.
Air cycle (ACB and EC) – The control board includes a
separate switch to provide periodic cycling of the fan to
reduce the chance for water to collect in the ducts if
located in a cold space and not used, or to provide
periodic fresh air if connected to a fresh air source.
EAC, ERV, or HRV (ACB and EC) – For the optimum in
indoor equality, the control board includes a dry-contact
relay to turn on an electronic air cleaner, energy recovery
ventilator, or heat recovery ventilator any time the fan is
on.
Potable water circulation (ACB and EC) – For improved
health safety, the control provides a switch selectable
feature to turn on the boiler pump periodically if installed
© Copyright 2011 Unico, Inc.
Constant airflow (EC only) – The EC control will deliver
the airflow requested without any user adjustments to the
duct system, or requiring the user to measure the
amperage.
Low airflow indicator (EC only) – The S.M.A.R.T.
control board (SCB) includes an indicator light that
informs the user that the desired airflow is not being met,
usually caused by a restrictive duct system or too few
outlets.
Pre-set air flow rate (EC only) – The SCB is preprogrammed for two different air flow rates for HIGHCOOL that can be selected with a board mounted switch.
Each of the six different modes are a fixed percentage of
this airflow.
Laptop adjustable (EC only) – The airflow for each mode
of operation is adjustable to any value between the blower
minimum and maximum using the ECMconfig software
(available for download at www.unicosystem.com) and
an ordinary USB cable.
Laptop troubleshooting (EC only) – The ECMconfig
software will also provide the user with feedback
indicating
the
actual
airflow,
motor
speed,
communications between the boards and the motor, and
the state of various inputs and outputs.
Optimized for zoning with hydronic systems (EC only) –
The ECMconfig software provides an additional feature
that allows the user to specify the maximum motor speed
so that the motor does not over speed when zone dampers
are closed. This prevents the need for bypass loops and
pressure switch controls and reduces noise at the outlets
caused by the blower trying to maintain a constant airflow
with fewer outlets. Setting a maximum airflow to
approximate constant static pressure should not be used
with a single speed condensing unit. Refer to the Unico
Tech Bulletin on zoning for more information.
Optimized for efficiency and sound (EC only) – The EC
control will use the lowest motor speed to achieve the
required airflow, which minimizes sound and maximizes
electrical efficiency.
Bulletin 20-18 — Page 3
All dimensions in inches (mm)
Blower Capacity Data – 1 ph / 230V / 60 Hz
Motor
Speed
Static Pressure, inches of water (Pa)
1.0 (248)
2-Spd
Standard
3
1.25 (310)
3
1.5 (372)
3
1.75 (435)
3
2.0 (496)
3
CFM (m /s )
Amps
CFM (m /s )
Amps
CFM (m /s )
Amps
CFM (m /s )
Amps
CFM (m /s )
Amps
High
450 (0.21)
1.82
420 (0.20)
1.73
385 (0.18)
1.65
345 (0.16)
1.56
300 (0.14)
1.44
Med.
400 (0.19)
1.55
372 (0.18)
1.46
340 (0.16)
1.36
300 (0.14)
1.24
226 (0.11)
1.05
Low
350 (0.17)
1.41
325 (0.15)
1.32
295 (0.14)
1.22
245 (0.12)
1.06
—
—
High
465 (0.22)
1.59
441 (0.21)
1.45
398 (0.19)
1.35
352 (0.17)
1.28
274 (0.13)
1.19
Low
EC
Low-speed airflow is half of rated high speed airflow at 1.0 amp with static pressure less than 0.5 inches of water (125 Pa)
The EC Motor adjusts RPM to maintain a desired airflow. Refer to page 8 for the performance map.
Hot Water Coil Performance
Entering
Water
Temperature
°F
GPM
(L/s)
2
(0.13)
120
(48.9)
4
(0.25)
6
(0.38)
2
(0.13)
130
(54.4)
4
(0.25)
6
(0.38)
2
(0.13)
140
(60)
4
(0.25)
6
(0.38)
2
(0.13)
150
(65.5)
4
(0.25)
6
(0.38)
2
(0.13)
160
(71.1)
4
(0.25)
6
(0.38)
2
(0.13)
170
(76.7)
4
(0.25)
6
(0.38)
Minimum Number of Outlets
© Copyright 2011 Unico, Inc.
°C
3
Water
Flow rate
Airflow, SCFM (m /s)
200 (0.09)
Capacity
MBH
(KW)
9.9
(2.87)
10.5
(3.05)
10.6
(3.07)
11.9
(3.45)
12.6
(3.65)
12.8
(3.71)
14.0
(4.06)
14.7
(4.26)
14.9
(4.32)
16.0
(4.79)
16.9
(4.98)
17.1
(5.02)
18.1
(5.25)
19.0
(5.51)
19.2
(5.57)
20.1
(5.83)
21.1
(6.12)
21.4
(6.21)
6
300 (0.14)
Capacity
MBH
(KW)
12.9
(3.74)
14.3
(4.15)
14.8
(4.29)
15.6
(4.52)
17.3
(5.02)
17.8
(5.16)
18.3
(5.31)
20.2
(5.86)
20.8
(6.03)
21.0
(6.50)
23.2
(7.05)
23.9
(7.22)
23.7
(6.87)
26.1
(7.57)
26.9
(7.80)
26.4
(7.66)
29.1
(8.44)
29.9
(8.67)
9
400 (0.19)
Capacity
MBH
(KW)
15.1
(4.38)
17.4
(5.05)
18.2
(5.28)
18.2
(5.28)
20.9
(6.06)
21.9
(6.35)
21.4
(6.21)
24.5
(7.11)
25.7
(7.45)
24.6
(7.75)
28.1
(8.75)
29.4
(9.10)
27.8
(8.06)
31.7
(9.19)
33.2
(9.63)
31.0
(8.99)
35.4
(10.27)
36.9
(10.70)
12
WPD
ft. water
(KPa)
0.8
(2.39)
3.2
(9.57)
7.0
(20.93)
0.8
(2.39)
3.2
(9.57)
6.9
(20.63)
0.8
(2.39)
3.1
(9.27)
6.9
(20.63)
0.8
(2.39)
3.1
(9.27)
6.8
(20.33)
0.8
(2.39)
3.1
(9.27)
6.8
(20.33)
0.8
(2.39)
3.1
(9.27)
6.7
(20.03)
Bulletin 20-18 — Page 4
Chilled Water Coil Performance (Cooling Mode)
Entering
Water
Temperature
3
Water
Flowrate
Airflow, SCFM (m /s)
200 (0.09)
300 (0.14)
Capacity
Capacity
°F
°C
GPM
(L/s)
MBH
(KW)
SHR
MBH
(KW)
2
(0.13)
11.1
(3.25)
0.62
14.1
(4.13)
4
(0.25)
11.9
(3.48)
0.61
15.8
(4.63)
40
(4.4)
6
(0.38)
12.5
(3.66)
0.60
17.2
(5.04)
2
(0.13)
8.6
(2.52)
0.66
10.7
(3.14)
4
(0.25)
10.1
(2.96)
0.63
13.3
(3.90)
45
(7.2)
6
(0.38)
10.6
(3.11)
0.62
14.5
(4.25)
2
(0.13)
6.9
(2.02)
0.72
8.7
(2.55)
4
(0.25)
8.1
(2.37)
0.68
10.7
(3.14)
50
(10.0)
6
(0.38)
8.5
(2.49)
0.67
11.6
(3.40)
2
(0.13)
5.3
(1.55)
0.83
6.9
(2.02)
4
(0.25)
6.0
(1.75)
0.77
8.0
(2.34)
55
(12.8)
6
(0.38)
6.3
(1.84)
0.76
8.6
(2.52)
Minimum Number of Outlets
6
9
*Entering Air Temperature 80°F (26.7°C) dry bulb / 67°F (19.4°C) wet bulb
Entering
Water
Temperature
SHR
0.67
0.64
0.62
0.75
0.68
0.65
0.82
0.74
0.71
0.92
0.85
0.82
WPD
ft. water
(KPa)
1.2
(3.60)
4.6
(13.80)
9.9
(29.70)
1.1
(3.30)
4.5
(13.50)
9.9
(29.70)
1.1
(3.30)
4.5
(13.50)
9.8
(29.40)
1.1
(3.30)
4.5
(13.50)
9.7
(29.10)
SHR
0.72
0.70
0.68
0.82
0.76
0.73
0.92
0.85
0.82
1.00
1.00
1.00
WPD
ft. water
(KPa)
1.2
(3.60)
4.6
(13.80)
9.9
(29.70)
1.1
(3.30)
4.5
(13.50)
9.9
(29.70)
1.1
(3.30)
4.5
(13.50)
9.8
(29.40)
1.1
(3.30)
4.5
(13.50)
9.8
(29.40)
3
Water
Flowrate
Airflow, SCFM (m /s)
200 (0.09)
300 (0.14)
Capacity
Capacity
°F
°C
GPM
(L/s)
MBH
(KW)
SHR
MBH
(KW)
2
(0.13)
9.1
(2.66)
0.67
11.7
(3.42)
4
(0.25)
9.7
(2.84)
0.66
12.9
(3.77)
40
(4.4)
6
(0.38)
10.1
(2.95)
0.65
14.0
(4.09)
2
(0.13)
6.8
(1.99)
0.74
8.6
(2.52)
4
(0.25)
7.9
(2.37)
0.70
10.5
(3.07)
45
(7.2)
6
(0.38)
8.2
(2.46)
0.69
11.3
(3.30)
2
(0.13)
5.2
(1.56)
0.83
6.8
(2.00)
4
(0.25)
5.9
(1.73)
0.78
8.0
(2.34)
50
(10.0)
6
(0.38)
6.2
(1.82)
0.77
8.5
(2.49)
2
(0.13)
3.7
(1.09)
1.00
5.0
(1.47)
4
(0.25)
4.0
(1.18)
0.96
5.6
(1.65)
55
(12.8)
6
(0.38)
4.1
(1.21)
0.95
5.8
(1.71)
Minimum Number of Outlets
6
9
*Entering Air Temperature 75°F (23.9°C) dry bulb / 63°F (17.2°C) wet bulb
© Copyright 2011 Unico, Inc.
SHR
0.64
0.62
0.61
0.71
0.65
0.64
0.78
0.71
0.69
0.88
0.81
0.79
400 (0.19)
Capacity
MBH
(KW)
16.0
(4.68)
18.7
(5.47)
20.9
(6.11)
12.2
(3.58)
15.7
(4.61)
17.5
(5.14)
10.1
(2.96)
12.7
(3.72)
14.0
(4.09)
8.2
(2.40)
9.7
(2.84)
10.5
(3.07)
12
SHR
0.70
0.68
0.66
0.79
0.73
0.71
0.88
0.82
0.79
1.00
1.00
0.97
400 (0.19)
Capacity
MBH
(KW)
13.5
(3.95)
15.3
(4.48)
17.0
(4.98)
10.0
(2.93)
12.5
(3.66)
13.7
(4.01)
8.1
(2.37)
9.6
(2.81)
10.4
(3.04)
5.9
(1.73)
7.0
(2.05)
7.3
(2.14)
12
Bulletin 20-18 — Page 5
Chilled Water Coil Performance (Heating Mode)
Entering
Water
Temperature
°F
(L/s)
200 (0.09)
Capacity
MBH
300 (0.14)
Capacity
400 (0.19)
Capacity
MBH
(KW)
MBH
2
(0.13)
4.9
(1.44)
4
(0.25)
4.9
(1.44)
6
(0.38)
4.9
(1.44)
2
(0.13)
7.9
(2.30)
4
(0.25)
7.9
(2.30)
110
(43)
6
(0.38)
7.9
(2.30)
2
(0.13)
9.8
(2.85)
4
(0.25)
9.8
(2.85)
120
(49)
6
(0.38)
9.8
(2.85)
2
(0.13)
13.8
(3.99)
4
(0.25)
13.8
(3.99)
140
(60)
6
(0.38)
13.8
(3.99)
2
(0.13)
17.7
(5.14)
4
(0.25)
17.7
(5.14)
160
(71)
6
(0.38)
17.7
(5.14)
2
(0.13)
21.8
(6.38)
4
(0.25)
21.8
(6.38)
180
(82)
6
(0.38)
21.8
(6.38)
Minimum Number of Outlets
6
*Entering Air Temperature 70°F (21°C) dry bulb
6.7
7.2
7.3
10.9
11.6
11.7
13.7
14.5
14.6
19.4
20.4
20.5
25.1
26.3
26.4
30.8
32.2
32.3
(1.97)
(2.12)
(2.14)
(3.20)
(3.39)
(3.41)
(4.01)
(4.21)
(4.23)
(5.68)
(5.92)
(5.94)
(7.35)
(7.63)
(7.65)
(9.02)
(9.34)
(9.37)
8.0
9.1
9.3
13.1
14.7
14.9
16.6
18.4
18.7
23.5
25.9
26.4
30.4
33.4
34.0
37.4
40.8
41.6
(35)
GPM
Airflow, SCFM (m /s)
(KW)
95
°C
3
Water
Flowrate
9
(KW)
(2.35)
(2.67)
(2.73)
(3.84)
(4.30)
(4.36)
(4.86)
(5.34)
(5.41)
(6.88)
(7.51)
(7.73)
(8.90)
(9.70)
(9.87)
(10.86)
(11.85)
(12.08)
12
WPD
ft.
water
1.1
4.3
9.3
1.1
4.2
9.2
1.1
4.2
9.1
1.1
4.1
8.9
1.1
4.0
8.7
1.1
3.9
8.6
WARNING – To prevent injury from high temperatures, do not install
floor outlets when operating with water above 160°F.
© Copyright 2011 Unico, Inc.
(KPa)
(3.28)
(12.84)
(27.75)
(3.28)
(12.43)
(27.45)
(3.28)
(12.43)
(27.15)
(3.28)
(12.19)
(26.55)
(3.28)
(11.98)
(25.95)
(3.28)
(11.60)
(25.65)
Bulletin 20-18 — Page 6
Engineering Specifications
Unico Part No.
Construction
Dimensions, inch (mm):
Shipping weight, lb (kg):
Cabinet Type:
Insulation:
Drain pan:
Drain pan connection:
Standard Return Duct ID, in (mm):
Standard Plenum ID, in (mm):
12 H x 20 W x 38 L (305H x 508W x 965L)
92 (42)
Galvanized
1 inch (25 mm) closed cell vinyl nitrile
Stainless Steel
1/2 inch FPT
12 (305)
7.0 (178)
Electrical
Type:
PSC (STD & ACB)
EC (SCB)
Fan Relay:
Transformer:
1 ph - 60/50 Hz - 208/230V
1 ph - 60/50 Hz - 100/120V
1 ph - 60/50 Hz - 208/230V
Snap acting with inherent time-delay
50 VA, 230/208V-24V
A00175-G10
A00175-G07
A00056-G02
A00057-G02
1/3 (0.25)
½ (0.37)
A00331-001 Standard
A00974-001 Two-speed
A01426-002
Motor
Size, hp (kW):
PSC
EC (variable speed)
Motor Speed, RPM
PSC
EC (variable speed)
FLA:
RLA:
Bearing Type:
1700/1550/1350
1800/VAR
1.9 (PSC), 5.6 (EC@120V), 3.2 (EC@230V)
Refer to Amperage Chart
Permanently Lubricated Ball
Blower Wheel
3
Airflow, CFM (m /s):
Static Pressure**, in. wc (Pa)
Type:
Nom. Diameter, inch (cm):
Width, inch (cm):
See table
See table
SISW Forward Curved
9.5 (24)
1.5 (3.8)
A00137-003
Refrigerant Coil (AC or HP option)
Nominal Capacity, tons (kW):
3
Rated Airflow, CFM (m /s):
3
Min. Airflow, CFM/ton (m /s•kW):
Refrigerant Type:
Face Area, ft² (m²):
Number of Rows:
Number of Circuits:
Fin Density, fins/in. (fins/cm):
Fin Type and pattern, in. (mm):
Tube Diameter, in (mm):
Tube Type:
Expansion Device:
Liquid Line Connection OD, in. (mm):
Suction Connection OD, in. (mm) :
1 to 1.5 (3.5 to 5)
400 (0.189)
200 (0.027)
R407C, R410A
1.167 (0.108)
6
3
15 (6)
Corrugated, 1 x 0.625 (25.40 x 15.88)
3/8 (9.53)
Rifled
TXV with Bleed Port and Check Valve
3/8 (9.53)
5/8 (15.88)
Chilled Water Coil (CW option)
Fluid Type
2
2
Face Area, ft (m ):
Number of Rows:
Number of Circuits:
Fin Density, fins/in. (fins/cm):
Fin Type and pattern, in. (mm):
Tube Diameter, in (mm):
Connection OD SWT, in (mm):
Water or Glycol-Water Solution
1.167 (0.108)
6
6
15 (6)
Corrugated, 1 x 0.625 (25.40 x 15.88)
3/8 (9.53)
5/8 (15.87)
Hot Water Coil (HW option)
Fluid Type
Face Area, ft² (m²)
Number of Rows
Number of Circuits
Fin Density, fins/in. (fins/cm):
Fin Type and pattern, in. (mm):
Tube Diameter, in (mm):
Connection OD SWT, in (mm):
Water or Glycol-Water Solution
1.0 (0.093)
4
6
10 (4)
Raised Lance, 1 x 0.866 (25.40 x 22.00)
3/8 (9.53)
5/8 (15.87)
A00326-001
A00366-002 (R410A)
A00397-001
HW-1218
** Static pressure across unit without hot water coil, using 6 inch ID plenum. Motor speed factory default is medium. Static pressure will be greater
© Copyright 2011 Unico, Inc.
when using 7 inch ID plenum.
Bulletin 20-18 — Page 7
Blower Capacity Data (PSC motors)
Wheel: FC950-200D
Housing: 950M
Motor: 1/3 HP, 1700 RPM (Dayton Model 9DM89)
Equip: M1218+AC
Supply: Metal duct, 7" dia., 5 feet to tee, then horseshoe configuration
Return: UPC-104-1218 (12" flex) connected to UPC-01-1218 (14 x 20" filter) with two 90° bends
Temperature: 66.2°F dry bulb
L/s
50
100
150
L/s
200
0
1700
1700
1600
1600
1500
1500
RPM
RPM
0
Wheel: FC950-200D
Housing: 950M
Motor: 1/3 HP, 1700 RPM (Dayton Model 9DM89)
Equip: M1218+AC
Supply: Metal duct, 7" dia., 5 feet to tee, then horseshoe configuration
Return: UPC-104-1218 (12" flex) connected to UPC-01-1218 (14 x 20" filter) with two 90° bends
Temperature: 66.2°F dry bulb
M1218
60Hz
High Speed
1400
50
100
M1218
60Hz
Medium Speed
150
200
1400
1300
400
V
8
230 20
1300
400
V
250
V
230
V
V
250
300
Watts
Watts
300
200
200
208V
100
2.0
100
2.0
V
208 230V
8V
20
Amps
Amps
1.5
1.0
1.0
0.5
0.5
500
2.0
1.5
300
Pa
400
1.0
300
1.0
0
50
100
150
200
250
300
350
400
Airflow, CFM
50
100
500
0
0
50
100
150
200
250
300
350
400
Airflow, CFM
0
1600
1600
1500
1500
RPM
1700
1400
1400
1300
400
1300
50
300
500
M1218+CB
60 Hz
208-250V
L/s
200
1700
450
R0301 _ Catalog
Graph3
1/15/2003
Tested by: J. Riley
Approved by: C. Messmer
Wheel: Revcor BC950-150S
Housing: Revcor 950M
Motor: 1/3 HP, 1625 RPM, Dayton A19844
Equip: M1218 + AC
Supply: 7" sheet metal duct to 9" sheet metal, straight to 1 tee, horse shoe
Return: 12" with filter across the duct opening (no grille)
Temperature: 68.9F, 32.4% RH
M1218
60Hz
Low Speed
150
100
0.0
R0301 _ Catalog
Graph1
1/15/2003
Tested by: J. Riley
Approved by: C. Messmer
Wheel: FC950-200D
Housing: 950M
Motor: 1/3 HP, 1700 RPM (Dayton Model 9DM89)
Equip: M1218+AC
Supply: Metal duct, 7" dia., 5 feet to tee, then horseshoe configuration
Return: UPC-104-1218 (12" flex) connected to UPC-01-1218 (14 x 20" filter) with two 90° bends
L/s
Temperature: 66.2°F dry bulb
0
450
200
0.5
0
0.0
400
1.5
0V
25
0V
23
0V
25
100
500
8V
V
08
0V 2
23
0.5
200
600
Pa
2.5
20
Static Pressure, in. wc
2.0
600
Static Pressure, in. wc
2.5
RPM
V
230
V
250
V
250
1.5
100
150
200
High Speed
Watts
Watts
300
200
200
100
Low Speed
230V
250V
208V
100
2.0
0
2.0
8V
20
V
230
V
250
1.5
1.0
1.0
0.5
Low Speed
0.5
2.5
600
1.5
300
1.0
200
0.5
100
100
150
200
250
300
Airflow, CFM
© Copyright 2011 Unico, Inc.
350
0V
50
400
0V
25
V
0
23
8
20
0.0
450
0
500
R0301 _ Catalog
Graph2
1/15/2003
Tested by: J. Riley
Approved by: C. Messmer
Pa
400
Static Pressure, in. wc
500
2.0
600
High Speed
2.0
500
400
1.5
300
1.0
200
Low Speed
0.5
100
0.0
0
0
50
100
150
200
250
300
Airflow, CFM
350
400
450
500
0337
Graph7
01/15/2004
Tested by: J. Riley
Approved by: C. Messmer
Pa
2.5
Static Pressure, in. wc
High Speed
Amps
Amps
1.5
Bulletin 20-18 — Page 8
Blower Capacity Data (EC motor)
0.02
0.04
0.06
0.08
0.10
0.16
0.18
0.22
0.24
Default Settings
A: 300 CFM, 1.2" , 165 W
B: 400 CFM, 1.2" , 240 W
2.8
2.6
W
Max RPM 1800
2.2
0.70
0.65
0.55
0.50
0
25
2.0
W
1600
0.45
0
15
1.8
0.26
0.60
0
20
2.4
W
1.6
0.40
0W
30
Static Pressure (IN WC)
0.20
1.4
1400
10
0
0.35
W
A
1.2
B
0.30
1200
1.0
0.8
Static Pressure (kPa)
0.00
U1218L-1EC1,1EC2
3
m /s
0.12 0.14
0.25
0.20
1000
0.6
0.15
50
W
800
0.4
600
0.2
0.10
25 W
0.05
400
0.0
0
50
100
150
200
250
300
350
400
450
Flow Rate (CFM)
R1014- Operating Envelope
M1218EC
Rev. AR
* Shaded Area Represents the Operating Range
Transmission Loss for Common Construction, dB
ACOUSTICAL DATA
Frequency, Hz
Sound is always present in our lives and is important to
comfort. Understanding how sound is defined is essential
to understanding how to design a proper Unico System.
Sound is defined as a physical disturbance in pressure that
is detectable by the human ear. Sound is usually presented
as Sound Pressure Level (SPL) in decibels (dB), but can
also be presented as Sound Power Level (SWL). Sound
pressure is what you hear so it is the only value that is
important to the occupant. However, determining the
value is difficult because it is dependent on the
surroundings and distance from the sound source. For
instance, a carpeted room is much quieter than a room
with wood floors.
The data shown in this catalog was measured in a large
room with hard surfaces for the walls and floor. It is
considered to be the worst case (i.e. loudest) situation.
The sound level in the occupied space will always be
considerably less than this, depending on where the unit
is located. To determine the actual sound level, subtract
the TL for the barrier from the sound data of the unit. The
table below shows typical TL values for common
construction configurations. Subtract these values from
the Unico air handler data.
© Copyright 2011 Unico, Inc.
1k
2k
4k
R
Sheet Metal, 24 GA
125 250 500
13
17
20
27
34
39
18
Ceiling Tile, mineral fiber
13
21
27
31
35
40
20
Gypsum Frame wall
12
23
31
38
42
37
20
Gypsum Frame wall, insul. 15
30
32
43
46
38
23
Wood Floor, uninsulated
22
28
37
43
46
43
25
Wood Floor, insulated
29
40
51
57
60
58
26
Concrete Block, 190-mm
38
41
43
50
55
61
26
Concrete, 100-mm (4 in.)
41
41
45
52
56
64
26
Ref: Handbook of Acoustical Measurements and Noise Control, 1998
R = Overall Loss for typical Blower Module (based on MB4260H-50HZ)
M1218
90
50 Hz
60 Hz
80
Sound Pressure Level, dB re 20 Pa
For the Unico System, it is also important to consider
sound transmission losses through ceilings and walls. The
blower is never placed in the occupied room so the sound
is always less than the published value. This reduction in
sound level depends on the construction of the ceiling or
wall. For instance, a ceiling structure made of gypsum
board with insulation above it will have a much greater
sound transmission loss (TL) than a dropped ceiling
without insulation.
0.00
550
500
300 CFM
(142 L/s)
70
60
NC-60
NC-55
50
NC-50
NC-45
40
NC-40
NC-35
30
NC-30
Measured 3 ft. (1 m) from unit
(side opposite control box)
21 ft. x 35 ft. lab (school classroom).
Tested 9/12/2002 and 2/26/2004
20
10
31.5
63
125
250
500
1k
NC-25
2k
Octave Band Center Frequency, Hz
4k
8k

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project