Page 1
MicroTech
TM
Unit Ventilator Controller
AAF-HermanN elson Classroom Unit Ventilator
Model AVS, AVH, Floor Mounted
Model AVF, AHF, Ceiling Mounted
Program UV7: Chilled Water Cooling Only
Chilled Water Cooling and Electric Heating
Operation Manual
OM 107-1
Group: Unit V entilator
Part No.: 106101801
Date: July 1999
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Software ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Chilled Water Cooling Only, Valve Control . . . . . . . . . . 2
Description of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Occupied or Tenant Override Operating Mode . . . . . . 3
Unoccupied Operating Mode . . . . . . . . . . . . . . . . . . . . 3
Discharge Air Low Limit Control . . . . . . . . . . . . . . . . . 3
Safeties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Sequence Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chilled Water Cooling Only, Damper Control . . . . . . . . 5
Description of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Occupied or Tenant Override Operating Mode . . . . . . 5
Unoccupied Operating Mode . . . . . . . . . . . . . . . . . . . . 5
Discharge Air Low Limit Control . . . . . . . . . . . . . . . . . 5
Chilled Water Cooling and Electric
Heating, Valve Control . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Description of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Occupied or Tenant Override Operating Mode . . . . . . 7
Unoccupied Operating Mode . . . . . . . . . . . . . . . . . . . . 8
Discharge Air Low Limit Control . . . . . . . . . . . . . . . . . 8
Safeties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Sequence Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chilled Water Cooling and Electric
Heating, Damper Control . . . . . . . . . . . . . . . . . . . . . . . 10
Description of Operation . . . . . . . . . . . . . . . . . . . . . . . . . 10
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Occupied or Tenant Override Operating Mode . . . . . 10
Unoccupied Operating Mode . . . . . . . . . . . . . . . . . . . 10
Discharge Air Low Limit Control . . . . . . . . . . . . . . . . 11
Sequence Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Sequence Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Page 2
Introduction
This manual describes the sequences of operation for MicroTech
controlled AAF-HermanNelson Unit V entilators equipped with chilled
water cooling and electric hating, or chilled water cooling only. Unit
Ventilators with these heating and cooling configurations could be
AAF-HermanNelson models AVV, AVS, AHF or AHV. Regardless of
General Information
Software ID
The Unit Ventilator Controller software must be compatible with the Unit
V entilator heating and cooling configuration. The softw are is identified by
a program code and “software model” number printed on a small label
attached to the controller. Models AVV, AVS, AHF, or AHV with chilled
water cooling only or both chilled water cooling and electric heating use
program UV7***. The first wild card character defines the UVC
communication type as follows: S = stand-alone , M = master/slav e, and
N = network code. The last two wild card char acters denote the software
version (numeric) and revision lev el (alphabetical) respectiv ely . Progr am
UV7*** comprises four software models: MDL15 through MDL18. Each
software model is for a diff erent unit configuration. Refer to Table 1.
Table 1. Program UV7 Unit Ventilator Configurations
Program Software Model Configuration Description
MDL15 Chilled Water Only, Valve Control
UV7***
MDL16 Chilled Water Only, Damper Control
MDL17 Chilled Water and Electric Heat, Valve Control
MDL18 Chilled Water and Electric Heat, Damper Control
the AAF model type, the Unit Ventilator Controller (UVC) provided
with these units uses program UV7***.
For more information on the MicroTech Unit Ventilator Controller,
refer to Bulletin No. IM613, “MicroTech Unit Ventilator Controller.”
Setpoints
Most UVC setpoints are either “hardware” or “software” adjustable.
Hardware adjustable means there is an on-board potentiometer used
for adjustment. Software adjustable means a PC equipped with Monitor
software and proper cable connection is required to make an adjustment.
Default software adjustable v alues are shown on the sequence charts.
Hardware adjustable values sho wn on the charts are for example only.
Several UVC setpoints are defined b y offsets relative to other setpoints.
Table 2 summarizes these setpoints and offsets.
Table 2. UVC Setpoints
Setpoint
Description Abbreviation Defined By Label
Occupied cooling setpoint OCS Hardware setpoint Room Setpoint -Ventilation cooling setpoint VCS Software offset (below OCS) Vent Clg Offset 2oF
Occupied heating setpoint OHS Software offset (below OCS) Occ RmT Spt Difl 6oF
Unoccupied heating setpoint UHS Hardware offset (below OHS)
Unoccupied cooling setpoint UCS Hardware offset (above OCS)
Ventilation cooling lockout VCLO Software setpoint OAT Vent Clg Lkout 64oF
Ventilation cooling discharge air low limit VCLL Software setpoint DAT Vent Clg Low 55oF
Chilled water cooling discharge air low limit CWLL Software setpoint DAT CW Clg Low 45oF
Outdoor air lockout OALO Software setpoint OALO Setpoint 35oF
Unocc Offset --
Chilled Water Cooling Only, Valve Control
Description of Operation
Definitions
Control T emperature
In order to maintain more stable room temperature control, the
MicroTech Unit Ventilator Controller (UVC) uses the concept of a
“Control Temperature.” During the occupied or tenant override
operating modes, the Control T emperature is a weighted v alue equal
to 19/20 room temperature and 1/20 discharge air temperature.
During the unoccupied operating mode, the Control Temperature is
set equal to the room temperature.
OM 107-1 / Page 2 (Rev. 7/99)
Setpoint Abbreviations
OCS Occupied cooling setpoint
VCS Ventilation cooling setpoint
OHS Occupied heating setpoint
UHS Unoccupied heating setpoint
UCS Unoccupied cooling setpoint
VCLO Ventilation cooling outdoor air lockout setpoint
VCLL Ventilation cooling discharge air low limit setpoint
CWLL Chilled water cooling discharge air low limit setpoint
OALO Outdoor air lockout setpoint
Software ID
Program: UV7***
Software Model: MDL15
Default
Value
Page 3
Occupied or Tenant Override Operating Mode
The supply fan will run continually in the occupied or tenant override
operating modes.
When the UVC is first energized it will perform a self-calibration
procedure upon the OA damper and valv e actuators. The calibr ation
procedure will take approximately 5-minutes to perf orm during which
time the supply fan will not operate.
An outdoor air lockout setpoint has been provided to force the OA
damper closed when the OA temperature goes below the OALO
setpoint (software adjustable).The OALO setpoint must not be set
below the freeze point of the liquid being used within the building
water loop. In order to lower the OALO setpoint below the default
value glycol must be added to the building water loop in sufficient
concentration to ensure freezing will not occur. However, the O ALO
setpoint can be lowered if steam heat is used.
If provided, the optional exhaust fan output will energize when the
OA damper opens and de-energize when the OA damper closes.
If provided, the optional ventilation lock out feature can ov erride UVC
temperature control and keep the OA damper closed as required.
If provided, the optional auxiliary heat output will operate a normally
open device. The auxiliary output will energize (close the device)
when the Control Temperature is above the OHS. The auxiliary output
will de-energize (open the device) when the Control Temperature is
o
F below the OHS.
3
The same UVC output is used for both the auxiliary heat output
feature and the exhaust f an output f eature. Therefore, both features
cannot be used together.
Note: When switching from unoccupied-to-occupied mode the OA
damper will remain closed for the first 5-minutes of occupied operation.
Morning Start
If the space is cool and heating is required, the outdoor air (OA)
damper will remain closed and room air will be circulated until the
Control Temperature rises to within 3
will be opened to minimum position.
If the space is warm and cooling is required, the unit will operate as
described in “Cooling Operation” below. If the outdoor air is not
suitable for free cooling, the OA damper will remain closed until the
Control Temperature falls to within 3
will be opened to minimum position.
Cooling Operation
When the Control Temperature is greater than the OHS setpoint and
less than the VCS setpoint, the OA damper will be held at its minim um
position setpoint (hardware adjustable). As the Control Temperature
rises and cooling becomes necessary, the UVC will decide whether
the outdoor air is suitable for free cooling by comparing the outdoor
air temperature (dry bulb) to the VCLO setpoint.
If the OA temperature is less than or equal to the VCLO setpoint,
the economizer will modulate as required to maintain the VCS
setpoint (default = 2
o
F less than OCS). The Control Temperature will
rise if the outdoor air is too warm to satisfy the cooling load. If the
OA damper is more than 85% open, the chilled water valve will
modulate as required to maintain the OCS setpoint.
If the OA temperature is warmer than the VCLO setpoint, the chilled
water valve will modulate as required to maintain the OCS setpoint.
The OA damper will be held to the minimum position setpoint, except
when the Control Temperature is 3
unlikely situation, the OA damper will be closed.
As the Control Temperature falls, the chilled water valve will modulate
closed. If the v alve is less than 15% open when the Control T emperature
falls below the VCS setpoint, the OA damper will modulate closed.
Note: Regardless of the economizer state, its operation is subject
to discharge air low limit control.
o
F of the OHS setpoint. Then it
o
F of the OCS setpoint. Then it
o
F or more above the OCS. In this
Heating Operation
The OA damper will maintain its minimum position when the Control
Temperature is within 3
Temperature falls to 3
Certified Drawing
o
F of the OHS setpoint. If the Control
o
F or more below the OHS, the OA damper
will be closed and room air will be circulated.
Unoccupied Operating Mode
The outdoor air damper will always be closed when the unit is in the
unoccupied operating mode. The indoor fan will remain off when the
unit is in the unoccupied operating mode unless heating or cooling
are required (see note below).
Note: During the unoccupied mode, if the fan remains off continually
for 60-minutes, it will start and run for 5-minutes.
Cooling Operation
If the Control Temperature rises to the UCS setpoint, the chilled
water valve will be fully opened and the fan will be energized.
o
When the Control Temperature falls 1
the fan will be de-energized. When it f alls 2
F below the UCS setpoint,
o
F below the UCS setpoint,
the valve will be closed.
Heating Operation
If the Control Temperature falls below the UHS setpoint, the fan will
be energized and room air will be circulated.
The fan will be de-energized when the Control Temperature rises
above the UHS setpoint.
Discharge Air Low Limit Control
There are two discharge air low limit functions: the “CW cooling” low
limit and the “vent cooling” low limit. The vent cooling low limit function
prevents the discharge air (D A) temperature from falling below the VCLL
setpoint whenever chilled water cooling is not necessary; when chilled
water cooling is necessary , the vent cooling low limit function is disabled.
The CW cooling low limit function prevents the DA temperature from
falling below the lower CWLL setpoint whene ver the unit is in the chilled
water cooling mode (chilled water valv e > 15% open).
Vent Cooling Low Limit (CW Cooling Inactive)
If the DA temperature f alls below the VCLL setpoint, the OA damper
will modulate toward fully closed. When the DA temper ature rises to
the VCLL setpoint, normal operation will resume.
CW Low Limit (CW Cooling Active)
If the DA temperature falls below the CWLL setpoint, the chilled
water valve will be closed.
If the DA temperature rises abov e the CWLL setpoint before the actual
valve position is less than 15% open, normal operation will resume.
If the DA temperature remains below the CWLL setpoint until the
actual valve position is less than 15% open (unlikely), the O A damper
will be closed by the vent cooling low limit function (see above).
Safeties
Low Water Coil Leaving Air Temperature
A normally closed low temperature switch is provided to detect low
leaving air temperature conditions on the indoor air coil. The low
temperature switch cut out is 38
When the UVC detects the possibility of low leaving air temperatures
for longer then 5-seconds (fixed), the following will occur:
• The OA damper is closed
• The chilled water valv e is opened to 25% if the DA temperature
is above the VCLL setpoint
• The chilled water valve is opened to 100% if the D A temperature
is less than or equal to the VCLL setpoint
When the alarm conditions are gone, the fault will automatically reset.
o
F +/– 2 and the cut in is 45oF +/– 2.
OM 107-1 / Page 3 (Rev. 7/99)
Page 4
Sequence Charts
12345678901234
4
12345678901234
5
5
123
123
123
123
The following charts graphically summarize the expected sequences
of operation for this Unit Ventilator configuration. The charts are all
based upon factory default setpoints. The output states indicated on
the charts will typically exist for a particular control temperature,
howev er, e xceptions will occur when other control features are active
or when alarm conditions exist or when factory defaults are changed.
Brief descriptions of the control feature exceptions are noted on the
Outdoor Air Temperature Dependent Functions
charts. Refer to bulletin No. IM613, “MicroTech Unit Ventilator
Controller” for more information.
Software ID
Program: UV7***
Software Model: MDL015
Outdoor Air Temperature (
o
F)
UVC
Function
Indicated
State
Notes
OALO VCLO
34 35 36 63 64 65
Economizer Cooling Available 1,3,4
Outdoor Air Lockout Available 2
Indicated state
(default setpoints)
Indicated state dependent on
differential (default setpoints)
Outdoor Air Temperature Dependent Function Notes:
1. Economizer cooling will be unavailable when OA is above VCLO
2. OA lockout feature is enabled from the factory in UV Model 15, when enabled the O A damper will be forced closed if O A temperature is below OALO
3. In very humid locations VCLO can be lowered to limit the economizer function
4. In locations where humidity is of no concern, VCLO can be raised slightly to allow additional economizer cooling
Occupied Mode
o
F)
1234567890123
UVC
Output
Indicated
State
Notes
Cooling Valv e Modulating 2,6
Economizer 1,2,4
OA Damper Minimum Pos. 1,3,5
Control T emper ature (
OHS VCS OCS
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
Closed 1,3,5
234
Indicated state
(default setpoints)
Indicated state dependent on
differential (default setpoints)
Indicated state dependent on OA
234
temperature (default setpoints)
Occupied Mode Notes:
1. The vent cooling discharge air low limit function can affect OA damper position
2. In economizer mode, when cooling is required, the OA damper must be greater than 85% open before hydronic cooling is enabled
3. Control temperature can affect OA damper operation
4. Valve must be less than 15% open before OA damper will begin closing
5. The outdoor air lockout option, if enabled, can affect OA damper position
6. Valve operation can be affected by the CW low limit function
Unoccupied Mode
Control T emper ature (
UVC
Output
Cooling Valv e Fully Open 1
Indoor Fan Off 2
Indicated state
(default setpoints)
Unoccupied Mode Notes:
1. Valve operation can be affected by the CW low limit function
2. The indoor fan will remain off in unoccupied mode when heating and cooling are not required
Indicated
State
Notes
Indicated state dependent on
differential (default setpoints)
UHS UCS
58 59 60 61 62 84 85 86 87
o
F)
OM 107-1 / Page 4 (Rev. 7/99)
Page 5
Chilled Water Cooling Only, Damper Control
Description of Operation
Definitions
Control T emperature
In order to maintain more stable room temperature control, the
MicroTech Unit Ventilator Controller (UVC) uses the concept of a
“Control Temperature.” During the occupied or tenant override
operating modes, the Control Temperature is a weighted value equal
to 19/20 room temperature and 1/20 discharge air temperature.
During the unoccupied operating mode, the Control Temperature is
set equal to the room temperature.
Setpoint Abbreviations
OCS Occupied cooling setpoint
VCS Ventilation cooling setpoint
OHS Occupied heating setpoint
UHS Unoccupied heating setpoint
UCS Unoccupied cooling setpoint
VCLO Ventilation cooling outdoor air lockout setpoint
VCLL Ventilation cooling discharge air low limit setpoint
CWLL Chilled water cooling discharge air low limit setpoint
OALO Outdoor air lockout setpoint
Software ID
Program: UV7***
Software Model: MDL16
Occupied or Tenant Override Operating Mode
The supply fan will run continually in the occupied or tenant override
operating modes.
When the UVC is first energized it will perform a self-calibration
procedure upon the OA damper and the face-and-bypass damper
actuators. The calibration procedure will take approximately 5minutes to perform during which time the supply fan will not operate.
If enabled, and outdoor air lockout setpoint has been provided to
force the OA damper to close when the OA temper ature goes below
the OALO setpoint (software adjustable). This feature is typically
used only on valve control h ydronic heat and/or h ydronic cool units.
This feature is disabled by default in UV Models 16 and 18.
If provided, the optional ventilation lockout feature fan can override
UVC temperature control and keep the OA damper closed as
required.
If provided, the optional exhaust fan output will energize when the
OA damper opens and de-energize when the OA damper closes.
If provided, the optional auxiliary heat output will operate a normally
open device. The auxiliary output will energize (close the device)
when the Control Temperature is above the OHS. The auxiliary output
will de-energize (open the device) when the Control Temperature is
o
3
F below the OHS.
The same UVC output is used for both the auxiliary heat output
feature and the exhaust f an output f eature . Therefore, both features
cannot be used together.
Note: When switching from unoccupied-to-occupied mode the OA
damper will remain closed for the first 5-minutes of occupied operation.
Morning Start
If the space is cool and heating is required, the outdoor air (OA)
damper will remain closed and room air will be circulated until the
Control Temperature rises to within 3
will be opened to minimum position.
If the space is warm and cooling is required, the unit will operate as
described in “Cooling Operation” below. If the outdoor air is not
suitable for free cooling, the OA damper will remain closed until the
Control Temperature falls to within 3
will be opened to minimum position.
o
F of the OHS setpoint. Then it
o
F of the OCS setpoint. Then it
Certified Drawing
Cooling Operation
When the Control Temperature is greater than the OHS setpoint and
less than the VCS setpoint, the OA damper will be held at its minim um
position setpoint (hardware adjustable). As the Control Temperature
rises and cooling becomes necessary, the UVC will decide whether
the outdoor air is suitable for free cooling by comparing the outdoor
air temperature (dry bulb) to the VCLO setpoint.
If the OA temperature is less than or equal to the VCLO setpoint, the
economizer will modulate as required to maintain the VCS setpoint
(default = 2
o
F less than OCS). The Control Temperature will r ise if
the outdoor air is too warm to satisfy the cooling load. If the OA
damper is more than 85% open, the face-and-bypass damper will
modulate as required to maintain the OCS setpoint.
If the OA temperature is warmer than the VCLO setpoint, the faceand-bypass damper will modulate as required to maintain the OCS
setpoint. The OA damper will be held to the minimum position
setpoint, except when the Control T emper ature is 3
o
F or more above
the OCS. In this unlikely situation, the OA damper will be closed.
As the Control Temperature falls, the face-and-bypass damper will
modulate toward bypass. If the f ace-and-bypass damper is less than
15% open to face when the Control Temperature falls below the
VCS setpoint, the OA damper will modulate closed.
Note: Regardless of the economizer state, its operation is subject to
discharge air low limit control.
Heating Operation
The face-and-bypass damper will be in the full b ypass position. The
OA damper will maintain its minimum position when the Control
Temperature is within 3
T emperature f alls to 3
o
F of the OHS setpoint. If the Control
o
F or more below the OHS, the OA damper will
be closed and room air will be circulated.
Unoccupied Operating Mode
The outdoor air damper will always be closed when the unit is in the
unoccupied operating mode.
The indoor fan will remain off when the unit is in the unoccupied operating
mode unless heating or cooling are required (see note below).
Note: During the unoccupied mode, if the fan remains off continually
for 60-minutes, it will start and run for 5-minutes.
Cooling Operation
If the Control Temperature rises to the UCS setpoint, the face-andbypass damper will be fully opened to face and the f an will be energized.
When the Control Temperature falls 1
fan will be de-energized. When it falls 2
o
F below the UCS setpoint, the
o
F below the UCS setpoint,
the face-and-bypass damper will be closed to face.
Heating Operation
The face-and-bypass damper will be in the full bypass position. If
the Control Temperature falls below the UHS setpoint, the fan will be
energized and room air will be circulated.
The fan will be de-energized when the Control Temperature rises
above the UHS setpoint.
Discharge Air Low Limit Control
There are two discharge air low limit functions: the “CW cooling” low
limit and the “vent cooling” low limit. The vent cooling low limit function
prevents the discharge air (D A) temperature from falling below the VCLL
setpoint whenever chilled w ater cooling is not necessary; when chilled
water cooling is necessary , the vent cooling low limit function is disabled.
The CW cooling low limit function prevents the DA temperature from
falling below the lower CWLL setpoint whene ver the unit is in the chilled
water cooling mode (face-and-bypass damper > 15% open to face).
OM 107-1 / Page 5 (Rev. 7/99)
Page 6
Vent Cooling Low Limit (CW Cooling Inactive)
4
4
6
5
0
If the DA temperature f alls below the VCLL setpoint, the OA damper
will modulate toward fully closed. When the D A temperature rises to
the VCLL setpoint, normal operation will resume.
CW Low Limit (CW Cooling Active)
If the DA temperature falls below the CWLL setpoint, the face-andbypass damper will be closed to face.
Sequence Charts
The following charts graphically summarize the expected sequences
of operation for this Unit Ventilator configuration. The charts are all
based upon factory default setpoints. The output states indicated on
the charts will typically exist for a particular control temperature,
however, exceptions will occur when other control features are
active or when alarm conditions exist or when factory defaults are
changed. Brief descriptions of the control feature exceptions are
Outdoor Air Temperature Dependent Functions
UVC
Function
Indicated
State
Notes
If the DA temperature rises above the CWLL setpoint before the
actual face-and-bypass damper position is less than 15% open to
face, normal operation will resume.
If the DA temperature remains below the CWLL setpoint until the
actual face-and-bypass damper position is less than 15% open to
face (unlikely), the OA damper will be closed b y the vent cooling lo w
limit function (see above).
noted on the charts. Refer to bulletin No. IM613, “MicroTech Unit
Ventilator Controller” for more information.
Software ID
Program: UV7***
Software Model: MDL016
o
Outdoor Air Temperature (
F)
OALO VCLO
34 35 36 63 64 65
Economizer Cooling Available 1,3,4
Outdoor Air Lockout Available 2
Indicated state
(default setpoints)
Indicated state dependent on
differential (default setpoints)
Outdoor Air Temperature Dependent Function Notes:
1. Economizer cooling will be unavailable when OA is above VCLO
2. OA lockout feature is disabled from the f actory in UV Model 16, when enabled the O A damper will be f orced closed if O A temper ature is belo w OALO
3. In very humid locations VCLO can be lowered to limit the economizer function
4. In locations where humidity is of no concern, VCLO can be raised slightly to allow additional economizer cooling
Occupied Mode
Control T emper ature (
UVC
Output
F&BP Damper Modulating 2,6
OA Damper Minimum Pos. 1,3,5
Indicated state
(default setpoints)
Occupied Mode Notes:
1. The vent cooling discharge air low limit function can affect OA damper position
2. In economizer mode, when cooling is required, the OA damper must be greater than 85% open before hydronic cooling is enabled
3. Control temperature can affect OA damper operation
4. F&BP damper must be less than 15% open to face before OA damper will begin closing
5. The outdoor air lockout option, if enabled, can affect OA damper position
6. F&BP damper operation can be affected by the CW low limit function
Indicated
Notes
State
Economizer 1,3,4
Closed 1,3,5
Indicated state dependent on
differential (default setpoints)
OHS VCS OCS
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
23
Indicated state dependent on OA
23
temperature (default setpoints)
o
F)
234567890123456789
2345678901234
2345
OM 107-1 / Page 6 (Rev. 7/99)
Page 7
Unoccupied Mode
Control T emper ature (oF)
UVC
Output
F&BP Damper 100% Face 1
Indoor Fan Off 2
Indicated state
(default setpoints)
Unoccupied Mode Notes:
1. F&BP damper operation can be affected by the CW low limit function
2. The indoor fan will remain off in unoccupied mode when heating and cooling are not required
Indicated
State
Notes
58 59 60 61 62 84 85 86 87
Indicated state dependent on
differential (default setpoints)
Certified Drawing
UHS UCS
Chilled Water Cooling and Electric Heating, Valve Control
Description of Operation
Definitions
Control T emperature
In order to maintain more stable room temperature control, the
MicroTech Unit Ventilator Controller (UVC) uses the concept of a
“Control Temperature.” During the occupied or tenant override
operating modes, the Control Temperature is a weighted value equal
to 19/20 room temperature and 1/20 discharge air temperature.
During the unoccupied operating mode, the Control Temperature is
set equal to the room temperature.
Setpoint Abbreviations
OCS Occupied cooling setpoint
VCS Ventilation cooling setpoint
OHS Occupied heating setpoint
UHS Unoccupied heating setpoint
UCS Unoccupied cooling setpoint
VCLO Ventilation cooling outdoor air lockout setpoint
VCLL Ventilation cooling discharge air low limit setpoint
CWLL Chilled water cooling discharge air low limit setpoint
OALO Outdoor air lockout setpoint
Software ID
Program: UV7***
Software Model: MDL17
Occupied or Tenant Override Operating Mode
The supply fan will run continually in the occupied or tenant override
operating modes.
When the UVC is first energized it will perform a self-calibration
procedure upon the OA damper and valv e actuators. The calibr ation
procedure will take approximately 5-minutes to perf orm during which
time the supply fan will not operate.
An outdoor air lockout setpoint has been provided to f orce the OA damper
closed when the OA temperature goes below the OALO setpoint (softw are
adjustable).The OALO setpoint must not be set below the freez e point of
the liquid being used within the building water loop . In order to lo wer the
OALO setpoint below the default v alue glycol must be added to the building
water loop in sufficient concentration to ensure freezing will not occur.
Howev er, the OALO setpoint can be lowered if steam heat is used.
If provided, the optional exhaust fan output will energize when the
OA damper opens and de-energize when the OA damper closes.
If provided, the optional ventilation lock out feature call ov erride UVC
temperature control and keep the OA damper closed as required.
If provided, the optional auxiliary heat output will operate a normally
open device. The auxiliary output will energize (close the device)
when the Control Temperature is above the OHS. The auxiliary output
will de-energize (open the device) when the Control Temperature is
o
3
F below the OHS.
The same UVC output is used for both the auxiliary heat output
feature and the exhaust f an output f eature . Therefore, both features
cannot be used together.
Note: When switching from unoccupied-to-occupied mode the OA
damper will remain closed for the first 5-minutes of occupied operation.
Morning Start
If the space is cool and heating is required, the unit will operate as
described in “Heating Operation” belo w. The outdoor air (OA) damper
will remain closed until the Control Temperature rises to within 3
o
of the OHS setpoint. Then it will be opened to minimum position.
If the space is warm and cooling is required, the unit will operate as
described in “Cooling Operation” below. If the outdoor air is not
suitable for free cooling, the OA damper will remain closed until the
Control Temperature falls to within 3
o
F of the OCS setpoint. Then it
will be opened to minimum position.
Cooling Operation
When the Control Temperature is greater than the OHS setpoint and
less than the VCS setpoint, the OA damper will be held at its minim um
position setpoint (hardware adjustable). As the Control Temperature
rises and cooling becomes necessary, the UVC will decide whether
the outdoor air is suitable for free cooling by comparing the outdoor
air temperature (dry bulb) to the VCLO setpoint.
If the OA temperature is less than or equal to the VCLO setpoint, the
economizer will modulate as required to maintain the VCS setpoint
(default = 2
o
F less than OCS). The Control Temperature will r ise if
the outdoor air is too warm to satisfy the cooling load. If the OA
damper is more than 85% open, the chilled water valve will modulate
as required to maintain the OCS setpoint.
If the OA temperature is warmer than the VCLO setpoint, the chilled
water valve will modulate as required to maintain the OCS setpoint.
The OA damper will be held to the minimum position setpoint, except
when the Control Temperature is 3
o
F or more above the OCS. In this
unlikely situation, the OA damper will be closed.
As the Control Temperature falls, the chilled water valve will modulate
closed. If the v alve is less than 15% open when the Control Temperature
falls below the VCS setpoint, the OA damper will modulate closed.
Note: Regardless of the economizer state, its operation is subject to
discharge air low limit control.
F
OM 107-1 / Page 7 (Rev. 7/99)
Page 8
Heating Operation
When the Control Temperature is greater than the OHS setpoint,
and less than the VCS setpoint, the OA damper will be held at its
minimum position setpoint.
If the Control Temperature falls below the OHS setpoint, the two or
three (optional) stages of electric heat will be energized as required
using a “stage-up” interstage delay timer (default = 30 seconds).
When the Control Temperature rises to the OHS setpoint, the electric
heat stages will be de-energized using a “stage-down” interstage
delay timer (default = 30 seconds).
The OA damper will maintain its minimum position when the Control
Temperature is within 3
falls to 3
o
F or more below the OHS, the OA damper will be closed.
o
F of the OHS. If the Control Temperature
Unoccupied Operating Mode
The outdoor air damper will always be closed when the unit is in the
unoccupied operating mode.
The indoor fan will remain off when the unit is in the unoccupied operating
mode unless heating or cooling are required (see note below).
Note: During the unoccupied mode, if the fan remains off continually
for 60-minutes, it will start and run for 5-minutes.
Cooling Operation
If the Control Temperature rises to the UCS setpoint, the chilled
water valve will be fully opened and the fan will be energized.
When the Control Temperature falls 1
fan will be de-energized. When it falls 2oF below the UCS setpoint,
the valve will be closed.
Heating Operation
The fan will be energized when the Control T emper ature falls below the
UHS setpoint. If the Control Temperature falls below the UHS setpoint,
the two or three (optional) stages of electric heat will be energized as
required using a “stage-up” interstage dela y timer (default = 30 seconds).
When the Control Temperature rises to 2
the electric heat stages will be de-energized using a “stage-down”
interstage delay timer (default = 30 seconds). If the Control
Temperature is between the stage-up and stage-down points, no
staging action will occur.
The fan will be de-energized when the Control Temperature rises
above the UHS setpoint; however, it is interlocked so that it will not
stop before all electric heat stages are off.
o
F below the UCS setpoint, the
o
F above the UHS setpoint,
Vent Cooling Low Limit (CW Cooling Inactive)
If the DA temperature falls below the VCLL setpoint, the following
sequence will occur:
1. The OA damper modulates toward (or remains at) minimum
position
2. If the actual OA damper position is less than or equal to the
minimum setpoint, the electric heat will stage up as required to
prevent the DA temperature from falling below the VCLL
setpoint. The stage-up interstage dela y timer (default = 30 seconds) must expire bef ore each subsequent stage is energized
3. If the OA temperature is less than or equal to the VCLO setpoint
and the DA temperature remains below the VCLL setpoint after all electric heat stages have been energized (unlikely), the
OA damper will be closed
If the DA temperature rises to the VCLL setpoint at any time, the
above sequence will be executed in reverse until normal operation
resumes. (Electric heat stages will be de-energiz ed using the stagedown interstage timer.)
Note: The vent cooling discharge air low limit function is disabled
during the unoccupied mode.
CW Low Limit (CW Cooling Active)
If the DA temperature falls below the CWLL setpoint, the chilled
water valve will be closed.
If the DA temperature rises above the CWLL setpoint bef ore the actual
valve position is less than 15% open, normal operation will resume.
If the DA temperature remains below the CWLL setpoint until the
actual valve position is less than 15% open (unlik ely), the vent cooling
low limit function will be enabled (see above).
Safeties
Low Water Coil Leaving Air Temperature
A normally closed low temperature switch is provided to detect low
leaving air temperature conditions on the indoor air coil. The low
temperature switch cut out is 38
When the UVC detects the possibility of low leaving air temperatures
for longer than 5-seconds (fixed), the following will occur:
• The OA damper is closed
• First stage of electric heat is energized (only with fan on)
• The chilled water valve is closed
When the alarm conditions are gone, the fault will automatically reset.
o
F +/– 2 and the cut in is 45oF +/– 2.
Discharge Air Low Limit Control
There are two discharge air low limit functions: the “CW cooling” low
limit and the “vent cooling” low limit. The v ent cooling low limit function
prevents the discharge air (D A) temperature from falling below the VCLL
setpoint whenever chilled water cooling is not necessary; when chilled
water cooling is necessary , the vent cooling low limit function is disabled.
The CW cooling low limit function prevents the DA temperature from
falling below the lower CWLL setpoint whene ver the unit is in the chilled
water cooling mode (chilled water valv e > 15% open).
Sequence Charts
The following charts graphically summarize the expected sequences
of operation for this unit ventilator configuration. The charts are all
based upon factory default setpoints. The output states indicated on
the charts will typically exist for a particular control temperature,
howev er, e xceptions will occur when other control features are active
or when alarm conditions exist or when factory defaults are changed.
Brief descriptions of the control feature exceptions are noted on the
OM 107-1 / Page 8 (Rev. 7/99)
Brownout
If the UVC detects low line voltage conditions that persist for at least
10 seconds, all electric heat stages will be immediately de-energized
and the “Brownout” fault will be indicated. The brownout alarm setpoint
is equivalent to approximately 85% of the nameplate v oltage v alue .
The Brownout fault will automatically reset when the line voltage
remains at or above 90% of the nameplate value for at least 5minutes.
Note: The four brownout parameters above are PC adjustable;
however, it is recommended that they not be changed.
charts. Refer to bulletin No. IM613, “MicroTech Unit Ventilator
Controller” f or more information.
Software ID
Program:UV7***
Software Model: MDL017
Page 9
4
Outdoor Air Temperature Dependent Functions
4
4
6
UVC
Function
Economizer Cooling Available 1,3,4
Outdoor Air Lockout Available 2
Indicated
State
Notes
Outdoor Air Temperature (
Certified Drawing
OALO VCLO
34 35 36 63 64 65
o
F)
Indicated state
(default setpoints)
Indicated state dependent on
differential (default setpoints)
Outdoor Air Temperature Dependent Function Notes:
1. Economizer cooling will be unavailable when OA is above VCLO
2. OA lockout feature is enabled from the factory in UV Model 15, when enabled the OA damper will be forced closed if OA tempera ture is below O ALO
3. In very humid locations VCLO can be lowered to limit the economizer function
4. In locations where humidity is of no concern, VCLO can be raised slightly to allow additional economizer cooling
Occupied Mode
Control T emper ature (oF)
UVC
Output
Electric Heat Staging 6,9
Cooling Valv e Modulating 2,7
OA Damper Minimum Pos. 1,5,8
Indicated state
(default setpoints)
Indicated
Notes
State
Economizer 2,3,4
Closed 1,5,8
Indicated state dependent on
differential (default setpoints)
OHS VCS OCS
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
234567890123
2345
23
Indicated state dependent on OA
23
temperature (default setpoints)
Occupied Mode Notes:
1. The vent cooling discharge air low limit function can affect OA damper position
2. Economizer cooling when available, will work in conjunction with compressorized cooling dependent upon control temperature
3. In economizer mode, when cooling is required, the OA damper must be greater than 85% open before hydronic cooling is enabled
4. Valve must be less than 15% open to face before OA damper will begin closing
5. Control temperature can affect OA damper operation
6. Electric heat can be made active by the vent cooling discharge air low limit function
7. Valve operation can be affected by the CW low limit function
8. The outdoor air lockout option, if enabled, can affect OA damper position
9. When within the areas indicated above, electric heat will be staging up or will be on; outside the areas indicated, electric heat will be staging down or
will be off
Unoccupied Mode
Control T emper ature (
UVC
Output
Electric Heat Staging
Cooling Valv e Fully Open 1
Indoor Fan Off 2
Indicated state
(default setpoints)
Unoccupied Mode Notes:
1. Valve operation can be affected by the CW low limit function
2. The indoor fan will remain off in unoccupied mode when heating and cooling are not required
Indicated
State
Notes
Indicated state dependent on
differential (default setpoints)
UHS UCS
58 59 60 61 62 84 85 86 87
o
F)
OM 107-1 / Page 9 (Rev. 7/99)
Page 10
Chilled Water Cooling and Electric Heating, Damper Control
Description of Operation
Definitions
Control T emperature
In order to maintain more stable room temperature control, the
MicroTech Unit Ventilator Controller (UVC) uses the concept of a
“Control Temperature.” During the occupied or tenant override
operating modes, the Control Temperature is a weighted value equal
to 19/20 room temperature and 1/20 discharge air temperature.
During the unoccupied operating mode, the Control Temperature is
set equal to the room temperature.
Setpoint Abbreviations
OCS Occupied cooling setpoint
VCS Ventilation cooling setpoint
OHS Occupied heating setpoint
UHS Unoccupied heating setpoint
UCS Unoccupied cooling setpoint
VCLO Ventilation cooling outdoor air lockout setpoint
VCLL Ventilation cooling discharge air low limit setpoint
CWLL Chilled water cooling discharge air low limit setpoint
OALO Outdoor air lockout setpoint
Software ID
Program: UV7***
Software Model: MDL18
Occupied or Tenant Override Operating Mode
The supply fan will run continually in the occupied or tenant override
operating modes.
When the UVC is first energized it will perform a self-calibration
procedure upon the OA damper and the face-and-bypass damper
actuators. The calibration procedure will take approximately 5minutes to perform during which time the supply fan will not operate.
If enabled, and outdoor air lockout setpoint has been provided to
force the OA damper to close when the OA temper ature goes below
the OALO setpoint (software adjustable). This feature is typically
used only on valve control h ydronic heat and/or h ydronic cool units.
This feature is disabled by default in UV Models 16 and 18.
If provided, the optional ventilation lock out feature can ov erride UVC
temperature control and keep the OA damper closed as required.
If provided, the optional exhaust fan output will energize when the
OA damper opens and de-energize when the OA damper closes.
If provided, the optional auxiliary heat output will operate a normally
open device. The auxiliary output will energize (close the device)
when the Control Temperature is above the OHS. The auxiliary output
will de-energize (open the device) when the Control Temperature is
o
3
F below the OHS.
The same UVC output is used for both the auxiliary heat output
feature and the exhaust f an output f eature . Theref ore , both f eatures
cannot be used together.
Note: When switching from unoccupied-to-occupied mode the OA
damper will remain closed for the first 5-minutes of occupied operation.
Morning Start
If the space is cool and heating is required, the unit will operate as
described in “Heating Operation” belo w. The outdoor air (OA) damper
will remain closed until the Control Temperature rises to within 3
of the OHS setpoint. Then it will be opened to minimum position.
If the space is warm and cooling is required, the unit will operate as
described in “Cooling Operation” below. If the outdoor air is not
suitable for free cooling, the OA damper will remain closed until the
Control Temperature falls to within 3
o
F of the OCS setpoint. Then it
will be opened to minimum position.
o
Cooling Operation
The cooling end-of-cycle (EOC) valve will be open whenever all
electric heat stages are off.
When the Control Temperature is greater than the OHS setpoint
and less than the VCS setpoint, the OA damper will be held at its
minimum position setpoint (hardware adjustable). As the Control
Temperature rises and cooling becomes necessar y, the UVC will
decide whether the outdoor air is suitable for free cooling by
comparing the outdoor air temperature (dry bulb) to the VCLO
setpoint (default = 68
o
F).
If the OA temperature is less than or equal to the VCLO setpoint, the
economizer will modulate as required to maintain the VCS setpoint
(default = 2
o
F less than OCS). The Control Temperature will rise if
the outdoor air is too warm to satisfy the cooling load. If the OA
damper is more than 85% open, the face-and-bypass damper will
modulate as required to maintain the OCS setpoint.
If the OA temperature is warmer than the VCLO setpoint, the faceand-bypass damper will modulate as required to maintain the OCS
setpoint. The OA damper will be held to the minimum position
setpoint, except when the Control T emper ature is 3
o
F or more above
the OCS. In this unlikely situation, the AO damper will be closed.
As the Control Temperature falls, the face-and-bypass damper will
modulate toward bypass. If the f ace-and-bypass damper is less than
15% open to face when the Control Temperature falls below the
VCS setpoint, the OA damper will modulate closed.
Note: Regardless of the economizer state, its operation is subject to
discharge air low limit control.
Heating Operation
When the Control Temperature is greater than the OHS setpoint
and less than the VCS setpoint, the OA damper will be held at its
minimum position setpoint.
If the Control Temperature falls below the OHS setpoint, the two or
three (optional) stages of electric heat will be energized as required
using a “stage-up” interstage dela y timer (default = 30 seconds). When
the first stage of heat is energized, the face-and-bypass damper will
be fully opened to face and the cooling EOC valv e will be closed.
When the Control Temperature rises to the OHS setpoint, the electric
heat stages will be de-energized using a “stage-down” interstage
delay timer (default = 30 seconds). When the last stage of heat is
de-energized, the face-and-bypass damper will modulate toward
bypass and the cooling EOC valve will be opened.
The OA damper will maintain its minimum position when the Control
Temperature is within 3
o
F of the OHS. If the Control Temperature
falls to 3oF or more below the OHS, the OA damper will be closed.
Unoccupied Operating Mode
The outdoor air damper will always be closed when the unit is in the
unoccupied operating mode.
The indoor fan will remain off when the unit is in the unoccupied operating
mode unless heating or cooling are required (see note below).
Note: During the unoccupied mode, if the fan remains off continually
for 60-minutes, it will start and run for 5-minutes.
Cooling Operation
If the Control Temperature rises to the UCS setpoint, the face-and-
F
bypass damper will be fully opened to face, the cooling EOC valve
will be opened, and the fan will be energized.
When the Control Temperature falls 1
EOC valve will be closed and the fan will be de-energized. When it
o
falls, 2
F below the UCS setpoint, the face-and-bypass damper will
be closed to face.
o
F below the UCS setpoint, the
OM 107-1 / Page 10 (Rev. 7/99)
Page 11
Heating Operation
The fan will be energized when the Control Temperature falls below
the UHS setpoint. If the Control Temperature falls below the UHS
setpoint, the two or three (optional) stages of electric heat will be
energized as required using a “stage-up” interstage delay timer
(default = 30 seconds). When the first stage of heat is energiz ed, the
face-and-bypass damper will be fully opened to face.
When the Control Temperature rises to 2
o
F above the UHS setpoint,
the electric heat stages will be de-energized using a “stage-down”
interstage delay timer (default = 30 seconds). If the Control
Temperature is between the stage-up and stage-down points, no
staging action will occur. When the last stage of heat is de-energiz ed,
the face-and-bypass damper will modulate toward bypass.
The fan will be de-energized when the Control Temperature rises
above the UHS setpoint; however, it is interlock ed so that it will not
stop before all electric heat stages are off.
Discharge Air Low Limit Control
There are two discharge air low limit functions: the “CW cooling” low
limit and the “vent cooling” low limit. The v ent cooling low limit function
prevents the discharge air (D A) temperature from falling below the VCLL
setpoint whenever chilled w ater cooling is not necessary; when chilled
water cooling is necessary , the vent cooling low limit function is disabled.
The CW cooling low limit function prevents the DA temperature from
falling below the lower CWLL setpoint whene ver the unit is in the chilled
water cooling mode (face-and-bypass damper > 15% open to face).
Vent Cooling Low Limit (CW Cooling Inactive)
If the DA temperature falls below the VCLL setpoint, the following
sequence will occur:
1. The OA damper modulates toward (or remains at) minimum
position
2. If the actual OA damper position is less than or equal to the
minimum setpoint, the electric heat will stage up as required to
prevent the D A temperature from falling belo w the VCLL setpoint.
The stage-up interstage delay timer (default = 30 seconds) m ust
expire before each subsequent stage is energized. When the
first stage is heat is energized, the face-and-bypass damper will
be fully opened to face and the cooling EOC valv e will be closed
3. If the OA temperature is less than or equal to the VCLO setpoint
Certified Drawing
and the DA temperature remains below the VCLL setpoint after all electric heat stages have been energized (unlikely), the
OA damper will be closed
If the DA temperature rises to the VCLL setpoint at any time, the
above sequence will be executed in reverse until normal operation
resumes. (Electric heat stages will be de-energiz ed using the stagedown interstage timer.)
Note: The vent cooling discharge air low limit function is disabled
during the unoccupied mode.
CW Low Limit (CW Cooling Active)
If the DA temperature falls below the CWLL setpoint, the face-andbypass damper will be closed to face.
If the DA temperature rises above the CWLL setpoint
before the actual face-and-b ypass damper position is less than 15%
open to face, normal operation will resume.
If the DA temperature remains below the CWLL setpoint until the actual
face-and-bypass damper position is less than 15% open to face
(unlikely), the vent cooling low limit function will be enab led (see above).
Brownout
If the UV detects low line voltage conditions that persist for at least
10 seconds (2 seconds for electric heat), all electric heat stages will
be immediately de-energized and the “Brownout” fault will be
indicated. The brownout alarm setpoint is equivalent to appro ximately
85% of the nameplate voltage value.
The brownout fault will automatically reset when the line voltage
remains at or above 90% of the nameplate v alue for at least 5 minutes.
Note: The four brownout parameters above are PC adjustable;
however, it is recommended that they not be changed.
Sequence Charts
The following charts graphically summarize the expected sequences
of operation for this unit ventilator configuration. The charts are all
based upon factory default setpoints. The output states indicated on
the charts will typically exist for a particular control temperature,
howev er, e xceptions will occur when other control features are activ e
or when alarm conditions exist or when factory defaults are changed.
Brief descriptions of the control feature exceptions are noted on the
Outdoor Air Temperature Dependent Functions
UVC
Function
Economizer Cooling Available 1,3,4
Outdoor Air Lockout Available 2
Indicated state
(default setpoints)
Outdoor Air Temperature Dependent Function Notes:
1. Economizer cooling will be unavailable when OA is above VCLO
2. OA lockout feature is disabled from the f actory in UV Model 18, when enabled the O A damper will be f orced closed if O A temper ature is belo w OALO
3. In very humid locations VCLO can be lowered to limit the economizer function
4. In locations where humidity is of no concern, VCLO can be raised slightly to allow additional economizer cooling
Indicated
State
Notes
Indicated state dependent on
differential (default setpoints)
charts. Refer to bulletin No. IM613, “MicroTech Unit Ventilator
Controller” f or more information.
Software ID
Program: UV7***
Software Model: MDL018
o
Outdoor Air Temperature (
F)
OALO VCLO
34 35 36 63 64 65
OM 107-1 / Page 11 (Rev. 7/99)
Page 12
Occupied Mode
UVC
Output
EOC Valv e Off (Open) 9
Electric Heat Staging 5,6
Indicated
State
Notes
o
Control T emper ature (
F)
OHS VCS OCS
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
F&BP Damper
OA Damper Minimum Pos. 1,3,7
Indicated state
(default setpoints)
Occupied Mode Notes:
1. The vent cooling discharge air low limit function can affect OA damper position
2. In economizer mode, when cooling is required, the OA damper must be greater than 85% open before hydronic cooling is enabled
3. Control Temperature can affect OA damper operation
4. F&BP damper must be less than 15% open to face before OA damper will begin closing
5. Electric heat can be made active by the vent cooling discharge air low limit function
6. F&BP damper will be 100% face before electric heat operation
7. The outdoor air lockout option, if enabled, can affect OA damper position
8. F&BP damper operation can be affected by the CW low limit function
9. EOC valve is not directly controlled b y the UVC, the v alv e (if used) is hardwired so that it will be open whenever the f an is on and all electric heat stages are off
100% Face 6
Modulating 2,8
Economizer 1,2,4
Closed 1,3,7
Indicated state dependent on
differential (default setpoints)
Indicated state dependent on OA
temperature (default setpoints)
Unoccupied Mode
o
F)
UVC
Output
Indicated
State
Notes
Control T emper ature (
UHS UCS
58 59 60 61 62 63 84 85 86 87
EOC Valv e Off (Open) 3
Electric Heat Staging 2
F&BP Damper
Indoor Fan Off 4
Indicated state
(default setpoints)
Unoccupied Mode Notes:
1. F&BP damper operation can be affected by the CW low limit function
2. F&BP damper will be 100% face before electric heat operation
3. EOC valve is not directly controlled by the UVC , the v alv e (if used) is hardwired so that it will be open whene ver the f an is on and all electric heat stages are off
4. The indoor fan will remain off in unoccupied mode when heating and cooling are not required
100% Face 2
100% Face 1
Indicated state dependent on
differential (default setpoints)
AAF-HermanNelson Incorporated
4900 Technology Park Boulevard, Auburn, New York 13021-9030 USA (315) 253-2771
Printed on recycled paper containing at least 10% post-consumer recycled material.
©1999 AAF – McQuay Incorporated
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