Ruskin AMS050 Instruction Manual

Air Quality Solutions
Installation & Maintenance Manual
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ALL STATED SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE OR OBLIGATION. © Ruskin August 2018II-AMS050-818/Replaces II-AMS050-912

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T ble of Contents
Pro uct Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Key Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Construction Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
I eal Installations Air Measurement Station Placements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Duct Diameter Equivalents Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Stan ar R4-274-R2-VDC Trans ucer Wiring Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Optional Control Panel Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Full Factory Controls I/O Chart Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Optional AMS070V Controller Wiring Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
The Air Measuring Station (AMS050) is designed to be used in any application that requires accurate airflow
measurement at velocities between 300 and 5,000 feet per minute (1.5 and 25 m/s). Unit may be installed in the
duct or in an air handling unit and can be used to measure outside air, return air, discharge air or exhaust air flows
into or out of a building or air handling unit.
Combines Ruskin’s exclusive anodized aluminum step sensor with a 3" (76mm) deep 3000
series aluminum honeycomb air straightener for accurate measurement to maximize perfor-
mance and offer repeatable and accurate results.

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#()"")!$#(30"'4="0,>@=492'?,?4:9B4?39?02=,7/,8;0=,9/:;?4:9,7/424?,7.:9?=:770=;,9078,D>34;49>0;,=,?0.:9?,490=>%70,>0A0=41D?3,?D:@3,A0=0.04A0/0A0=D?34929:?0/:9?30;,.6492>74;;=4:=?:;=:.00/492B4?3?3049>?,77,?4:9&08:A0?30"'1=:84?>>34;;492.:9?,490=,9/49>;0.?1:=/,8,20=@>?:=.:==:>4:9,=08@>?-0?,609493,9/7492?30@94?7B,D>3,9/70?30"'-D4?>1=,80:9:?741?4?-D?30-7,/07496,20,C708:?:=:=5,.6>3,1?:9:?/=:;/=,2>?0;:9:=,;;7D0C.0>>4A0-09/492?B4>?492:==,.64927:,/>?:?30"'';0.4,7.,=0>3:@7/-0@>0/?:;=:?0.??303:90D.:8->?=,423?090=9>;0.??30/@.?B:=6,9/:=:;09492B30=0?30"',>>08-7DB477-049>?,770/1:=,9D:->?=@.?4:9:=4==02@7,=4?40>?3,?8423?49?0=10=0B4?3-7,/0:=7496,20=:?,?4:9:=:;?4:9,7,.?@,?:=8:@9?49214?4>?:-049>?,770/49/@.?B:=6?30/@.?B:=6>3:@7/-0>@;;:=?0/,??30,=0,:1?30"'?:;=0A09?>,22492/@0?:?30@94?>B0423?(30"'8@>?-049>?,770/B4?3?301=,80><@,=0,9/B4?3:@??B4>?492:=-09/492(30@94?8@>?-049>?,770/B4?34?>-7,/0,C4>3:=4E:9?,7(30/,8;0=-7,/0>,C70>,9/7496,208@>?-0,-70?::;0=,?0B4?3:@?-09/492(30-0>?7:.,?4:91:=?300C?09/0/>3,1?:=5,.6>3,1?8@>?-0/0?0=8490/-01:=049>?,77492?30/,8;0=(30/,8;0=8,D-0=:?,?0//02=00>?:20??300C?09/0/>3,1?:9?30.:==0.?>4/0:1?30/@.?B:=61?0=?30/,8;0=4>49>?,770/?30>3,1?7:.,?4:9.,99:?-0.3,920/B4?3:@?=08:A492?30/,8;0=(305,.6>3,1?4149>?,770/B477,7B,D>-049?3070,A492,4=>?=0,8(30"'3,>,>;0.4140/4970?,9/:@?70?(30:@?>4/0,4=:=:?30=.:9?=:770/,4=>?=0,809?0=>?30@94??3=:@23?30,4=>?=,423?09492>0.?4:9,9/0C4?>1=:8?30/,8;0=>4/0)>0,;;=:;=4,?0>348>-0?B009?30/,8;0=1=,80,9//@.?:;09492?:;=0A09?/4>?:=?4:9:1?301=,80-D1,>?090=>3:7/4924?49;7,.01.=0,?492,8@7?4>0.?4:9,>>08-7D-0>@=0?3,?,77?30>0.?4:9>,=01,>?090/?:20?30=:9-:?3>4/0>1?30,.?@,?:=7496,20:=>3,1?492;=0>09?,;=:-7081:=49>?,77,?4:9;70,>0.:9>@7?D:@=7:.,7&@>649=0;=0>09?,?4A0:=?30&@>6491,.?:=D(30"'>3:@7/-0.D.70?0>?0/,1?0=49>?,77,?4:9?:,>>@=0;=:;0=:;0=,?4:91?0=49>?,77492?30,>>08-7D49?30/@.?B:=6:=8:@9?4923:70.,@76,=:@9/?30/,8;0=1=,80?:49>@=0?3,??30=04>9:70,6,20:=-D;,>>,4=,=:@9/?30,4=80,>@=492>?,?4:9(30:;?4:9,7"':9?=:7@94?4>1,.?:=D.,74-=,?0/,9/?0>?0/49:=/0=?:;0=1:=8.:==0.?7D494?>5:->;0.414.,;;74.,?4:9(30424?,7:9?=:7@94?4>?D;4.,77D>34;;0/7::>049,#"070.?=4.,709.7:>@=0,9/8@>?-049>?,770/B4?349100?:1?30"'49,909A4=:9809?,77D.:9?=:770/>;,.0B4=492>.308,?4.7,-074>7:.,?0/:9?30.:A0=;7,?01:=1@?@=0=010=09.0,9/49?34>/:.@809?(3009.7:>@=08@>?-0>0.@=07D,??,.30/?:,17,?>:74/>@=1,.0>@.3,>,B,77:=,4=3,9/7492@94?.,>492&010=?:B4=492>.308,?4.,9/.:9?=:7>>0.?4:9:1?34>/:.@809?1:=90.0>>,=D1407/;:B0=.:990.?4:9>&010=?:;,201:=4/0,7,;;74.,?4:9>;0.414.,4=80,>@=492;=:/@.?;7,.0809?:;?4:9>:9>@7?D:@=7:.,7=0;=0>09?,?4A0B4?3<@0>?4:9>,-:@?;7,.0809?
4
The optional AMS Control unit is factory calibrated and tested in order to perform correctly in its
job-specific application. The Digital Control unit is typically shipped loose in a NEMA 1 electrical
enclosure and must be installed within 100 feet (30.5m) of the AMS050 in an environmentally
controlled space. A wiring schematic label is located on the cover plate for future reference and
in this document. The enclosure must be securely attached to a flat solid surface, such as a wall
or air handling unit casing.

5
Air Me surement St tion Pl cements for Ide l Inst ll tions

(:/0?0=8490?30;7,.0809?:1,9,4=80,>@=492>?,?4:9?3,?4>7:.,?0//:B9>?=0,8:1,IA,90/07-:B,>>3:B949?30/0?,47,-:A01:77:B?30/@.?B4/?3/:B9?:?30/@.?30423?(309@8-0=,??34>49?0=>0.?4:9=0;=0>09?>/4>?,9.04949.30>C,8;70(30<@4A,709?:1,GCG/@.?GC,8;70(30>,80GCG/@.?49>?,770/,>>3:B949/0?,47B:@7/-0GC#:?0>779@8-0=>,=00C;=0>>0/4949.30>CC0?.
6
1. All numbers are expressed in inches.
2. 2D = 1D x 2, 3D = 1D x 3, etc.
3. Equivalent round duct diameter = SQRT ([4 x H x W] ÷ 3.1416)

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(30@94?4>49>?,770/49?30:@?>4/0,4=:;09492,9/1@=94>30/B4?3,8,9@,77:.64923,9/<@,/=,9?,9/,9&);=0>>@=0?=,9>/@.0=)9/0=17:B?30?=,9>/@.0=:@?;@?4>.30.60/B4?3,A:7?80?0=,9/.:8;,=0/?:?30;=0>>@=0.3,=?%"'(30/,8;0=4>8,9@,77D,/5@>?0/@9?47?30A:7?,20:@?;@?4>0<@,7?:?30/0>4=0/"17:B(30&)?=,9>/@.0=:@?;@?>429,7.,9-0B4=0/?:?30'?:;=:A017:B".,9-0/0?0=8490/-D=010=09.492?30.3,=?:=-D@?474E492?301:77:B4921:=8@7,:?3 ,,9/!8A,7@0>,=0.:9>?,9?>:=?30"' ,4>,9/!84>(30@94?4>49>?,770/49?30:@?>4/0,4=:;09492,9/1@=94>30/B4?3,9&)?=,9>/@.0=,9/,/,8;0=,.?@,?:=)9/0=17:B?30?=,9>/@.0=:@?;@?;=:/@.0>,A:7?,20>429,7?:?30@47/492@?:8,?4:9'D>?08'(30'.,7.@7,?0>?30"-,>0/:9?301:=8@7,,9/A07:.4?D;=0>>@=0%"'(30'>09/>,.:9?=:7>429,7?:?30"',.?@,?:=?:8:/@7,?0?30/0>4=0/"17:B(30@94?4>49>?,770/49?30:@?>4/0,4=:;09492,9/1@=94>30/B4?3,/,8;0=,.?@,?:=1,.?:=D.,74-=,?0/.:9?=:7;,907B4?384.=:;=:.0>>:=,9/49?02=,7;=0>>@=0?=,9>/@.0=8:/07"'*.:9?=:7>429,70<@,7?:?30/0>4=0/17:B=010=09.0>,8;70%"'.3,=?4>>09??:?30"'.:9?=:7;,907(3084.=:;=:.0>>:=.:8;,=0>?3049;@?>429,7B4?3?30,.?@,717:B,9/;:>4?4:9>?30/,8;0=,.?@,?:=?:8,49?,49?30>;0.4140/":=0C,8;7041,A/.>429,74>>09??:?30.:9?=:770=?30/,8;0=B:@7/-0.:9?=:770/?:=0>?=4.?:=49.=0,>017:B@9?47"H4>=0;:=?0/:=1@=?30=/0?,47>=010=09.0?30"'*+4=492>.308,?4.
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
7
Sequence of Oper tion
CFM can be determined by referencing the chart and utilizing the for-
mula below. Both a and L/m values are constants. See the PAMS
chart provided with your unit for a and l/m for your specific unit.
The unit is installed in the outside air opening and furnished with a damper actuator, factory calibrated
control panel with microprocessor and integral pressure transducer (model AMS070V). A control signal
equal to the desired air flow (reference sample I/O chart on Page 10), is sent to the AMS050 control panel.
The microprocessor compares the setpoint input signal with the actual flow and positions the damper
actuator to maintain the specified CFM. For the example on Page 10, if a 3 VDC signal is sent to the con-
troller, the damper would be modulated to restrict or increase flow until 5,200 CFM ±5% is reported. For
further details reference the AMS070V Wiring schematic.

Standard RU-274-R2-VDC Transducer Dip Switch Settings and Wiring Details
The Default Settings for S1, S2, and S3 are, 1-ON, 2-OFF
For other settings and pressure ranges consult transducer product data sheet
Notice: The AMS050 is available with multiple control solutions. If the AMS050 unit on you project has
something other than the solutions specified in this document, consult your local representative or the
company that provided this air measurement station.
Follow the steps below to set up the standard RU-274-R2-VDC low-pressure transducer. The default
settings are shown above for a 0-10VDC output and a 0-1.0 inwc pressure range. Normal power
source is 24VAC however 12 to 40VDC or 12 to 35VAC are also acceptable.
1. The terminal block can be wired by carefully unplugging it from the circuit board.
2. Locate the (+) (-) and the (O) terminal markings on the circuit board.
3. Attach the power wires to the respective (+) and (-) terminals. Note: the (-) terminal is also the
negative output termination point.
4. Connect the (O) terminal, which is the positive VDC output terminal, to the BAS input.
5. Verify the VDC output with a digital volt meter connected to the (O) and (-) terminals.
6. Voltage output signal and differential pressure range are dipswitch selectable. Reference the
installation instructions for the low-pressure transducer for additional information.
8
Follow the steps below to set up the standard RU-274-R2-VDC low-pressure transducer. The default
settings are shown above for a 0-10VDC output and a 0-1.0 inwc (249 Pa) pressure range. Normal
power source is 24VAC however 12 to 40VDC or 12 to 35VAC are also acceptable.

Controls
The AMS050 Air Measuring Station can be purchased with or without full factory controls. When purchased
without factory controls the AMS050 will be shipped with a Ruskin low-pressure transducer. The standard
transducer is a Ruskin RU-274-R2-VDC and is factory configured for 0-1.0 inwc (0-249 Pa) corresponding
to a 0-10VDC output. The transducer requires a power source of either 12-40VDC or 12-35VAC. Optional
transducers with LCD displays or 0-20mA output are also available.
The formula provided on the PAMS (Pressure Across Measuring Station) chart must be applied to convert
the output from the low-pressure transducer into a CFM value. Each unit is provided with a PAMS chart
developed specifically for that unit. Applying other formulas may result in greater air measurement error
and unacceptable results.
When the optional AMS070V full factory controls are ordered the AMS050 unit will ship with floating
damper actuators that are driven by two triac outputs from the controller. The AMS070V controller is fac-
tory programmed to the customer's specific requirements and accepts a 0-5V CFM setpoint input from the
building automation system (BAS). The controller will produce a 4-20MA output signal corresponding to the
actual air flow at any point in time. The controller will modulate the damper position to maintain the set-
point CFM value. The controller is equipped with an internal pressure transducer that converts the differ-
ential pressure from the air measurement station into the measured air flow value. The AMS070V controller
is housed in a 12" x 12" x 6" (305 x 305 x 152 mm) NEMA1 enclosure with a 120/208/240VAC to 24VAC
transformer. Each controller is shipped with an input output chart showing the input and output scaling for
that specific unit. Contact Ruskin with the control number to obtain the calibration charts for your specific
unit.
Option l AMS070V Control P nel Inst ll tion
1. The controller enclosure should be mounted securely on an adjacent wall or attached to the air
handling unit. The panel should be mounted within 100 feet (30.5 m) of the AMS050 to assure proper
pressure signal function. If the enclosure must be mounted more than 100 feet (30.5 m) from the
AMS050, please consult your local Ruskin representative or the company that you purchased the
device from.
2. Loosen the enclosure cover screws and remove the cover.
3. Remove the appropriate knock-outs for connection of the field wiring to the enclosure's terminal
blocks.
4. Fasten the enclosure to the wall or flat surface using the four mounting holes in the back of the
panel enclosure.
Wiring nd Piping Connections
1. Connect 120/208/240VAC power supply to the AMS050 control panel L1 and L2.
2. Connect the three actuator wires as shown (see page 9). Connect the bl ck (com) wire to
controller terminal 24H. Connect the red wire to controller terminal 24G (com) terminal.
Please note actuator wiring is as listed above, red 24G, black 24H.
3. Connect 0-5VDC signal from the BAS to UI (universal input) and common. Observe polarity.
4. Connect 4-20mA analog output AO and Common from the controller to the BAS system.
Observe polarity.
5. Connect pressure tubing from the controller to the airflow sensing blade, connecting the low
pressure port to the blade side nearest the damper and the high pressure port to the blade side
nearest the air straightener.
6. Optional Un-Occupied signal – connect dry contact between DI and Comm. Close contact to drive
damper closed when building is unoccupied. Open contact for normal operation.
9

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0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VOLTAGE DC INPUT
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CFM
4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0
MA OUTPUT

11
WHITE 120V
RED 208V
ORANGE 240V

AMS070V Controller (option l)
Power 120/208/240 VAC
Inputs 0-5 VDC (CFM Setpoint)
Pressure (low and high ports)
Option l Dry Contact between DI and Comm to close damper
Outputs 4-20mA analog signal (CFM (m/s) Measured)
Enclosure Painted NEMA 1 Enclosure 12" x 12" x 6" (305 x 305 x 152 mm) Deep
Oper ting R nge -22°F to 140°F (-30°C to 60°C)
Memory Nonvolatile EPROM
1. Semi-annually the damper tie-bar linkage and the jackshaft (if used) or extended shaft
bearings should be lubricated with silicone free lubricant.
2. Damper blade axle bearings do not normally require lubrication.
3. When dampers are installed where they are exposed to heavy dust-laden air, frequent
flushing of the damper axle bearings with water is recommended for extended bearing life.
4. Disconnect the sensing tubes between the damper and the pressure transducer or controller.
Apply a clean pressurized air source to the air piping connections at the AMS050 frame in
order to blow out the sensing ports in the fixed sensing blades of the AMS050. DO NOT
connect this ir source to the pressure tr nsducer or control modules. This will
d m ge the instruments. Replace tubing to the equipment in reverse order of removal.
5. The air straightener section of the AMS050 and the air sensing blades should be annually
inspected for particulate build-up. Use a damp cloth to wipe clean the sensing blade surface.
Water may be used to clean and flush the air straightening section and the sensing blades of
the AMS050. Using pressurized air for purging the sensing blades of water is recommended.
M inten nce
Specific tions
RU-274-R2-VDC Tr nsducer (low pressure tr nsducer)
Power 12-40 VDC or 12-35 VAC
Outputs 0-10 VDC (0-5 VDC field selectable)
Optional 4-20 mA Order AMS810 Transducer
Enclosure Painted NEMA 4 (IP-65)
Approv ls AMCA Certified +/-5%
Oper ting R nge 0°F to 175°F (-18°C to 80°C)
3900 Dr. Greaves Rd.
ansas City, MO 64030
[phone]
FAX [phone]
www.ruskin.com