Temspec VUD 1200 Manual

Temspec Unit Ventilator IOM 2023-07-05
Operation & Maintenance Manual
Unit Ventilators
© 2023 TEMSPEC INCORPORATED
IMPORTANT: Read and save this manual for future reference.
This manual is to be left with the equipment owner

Temspec Unit Ventilator IOM 2023-07-05
[1]
INTRODUCTION...................................................................................................................................................................2
About the Unit Ventilator ............................................................................................................................................................................................................2
NOMENCLATURE FOR NON-COMPRESSORIZED UNIT VENTILATORS............................................................................................................................2
SAFETY WARNINGS ...........................................................................................................................................................3
ELECTRICAL CONNECTIONS.............................................................................................................................................4
Line Voltage Connections ..........................................................................................................................................................................................................4
Type and Ratings of Fuses and Circuit Breakers......................................................................................................................................................................4
Grounding...................................................................................................................................................................................................................................4
Low Voltage Connections ..........................................................................................................................................................................................................4
TYPICAL LAYOUTS .............................................................................................................................................................5
VUD 1200...................................................................................................................................................................................................................................5
VUD 1600...................................................................................................................................................................................................................................6
VUD 2000...................................................................................................................................................................................................................................7
VUF 1200 ...................................................................................................................................................................................................................................8
VUF 1500 ...................................................................................................................................................................................................................................9
VDF 1200 .................................................................................................................................................................................................................................10
HCD 1200.................................................................................................................................................................................................................................11
HCD 1600.................................................................................................................................................................................................................................12
VER 1800.................................................................................................................................................................................................................................13
VGB 1600.................................................................................................................................................................................................................................14
HGB 1600.................................................................................................................................................................................................................................15
VUD Face and Bypass.............................................................................................................................................................................................................16
OPERATION.......................................................................................................................................................................17
Typical Modes of Operation .....................................................................................................................................................................................................17
Standard Piping........................................................................................................................................................................................................................18
Dampers...................................................................................................................................................................................................................................22
Powered Exhaust .....................................................................................................................................................................................................................22
Filtration....................................................................................................................................................................................................................................22
VER ERW Balancing Procedure..............................................................................................................................................................................................23
MAINTENANCE..................................................................................................................................................................24
Servicing the Unit .....................................................................................................................................................................................................................24
Maintenance Schedule.............................................................................................................................................................................................................24
Changing the Filters .................................................................................................................................................................................................................24
Cleaning the Coils ....................................................................................................................................................................................................................25
Motors.......................................................................................................................................................................................................................................25
Cleaning the Energy Recovery Wheel.....................................................................................................................................................................................25
Maximum Operating Conditions..........................................................................................................................................27
TROUBLESHOOTING........................................................................................................................................................27
Accessories Instructions .....................................................................................................................................................28
Block-off Panel .........................................................................................................................................................................................................................28
Side Pipe Cover .......................................................................................................................................................................................................................29
Top Extension ..........................................................................................................................................................................................................................30
Top Plenum –Free Discharge.................................................................................................................................................................................................31
Top Acoustical Plenum ............................................................................................................................................................................................................32
Raised Base.............................................................................................................................................................................................................................33
Rear Plenum.............................................................................................................................................................................................................................34
Wall Assembly..........................................................................................................................................................................................................................36
REPLACEMENT PARTS....................................................................................................................................................37
Limited Warranty......................................................................................................................................................................................................................37
Part Sales.................................................................................................................................................................................................................................37

Temspec Unit Ventilator IOM 2023-07-05
[2]
INTRODUCTION
About the Unit Ventilator
The Temspec unit ventilator is designed as a means for providing heating, cooling, and ventilation to
the classroom. Our goal is to help create an enhanced learning environment by focusing on the
following points when designing our equipment:
•Cooling, Heating, Humidity And Ventilation Control
•Air Distribution
•Sound Attenuation
By installing the vertical unit ventilator into the classroom, superior control can be obtained for each
room. Because the unit can be ducted, an even distribution of air can be achieved throughout the
room. The unit ventilator is constructed with heavy gauge metal and sound absorbing insulation for
optimal sound attenuation.
By applying sound engineering principles and thorough testing, we ensure the highest quality of
performance of our unit ventilators.
NOMENCLATURE FOR NON-COMPRESSORIZED UNIT VENTILATORS
V=Vertical Unit
H=Horizontal
UD = Upflow Ducted Unit Ventilator
UF = Upflow Freeblow (direct discharge) Unit Ventilator
CD = Horizontally Ducted Unit Ventilator
DF = Downflow Unit Ventilator
ER = Energy Recovery Unit Ventilator
GB = Dual Coil Dehumidifying Air Handling Unit
1200 = up to 1200 cfm
1500 = up to 1500 cfm
1600 = up to 1600 cfm
1800 = up to 1800 cfm
2000 = up to 2000 cfm
1200
UD
V

Temspec Unit Ventilator IOM 2023-07-05
[3]
SAFETY WARNINGS
Read the manual thoroughly before installing and using the appliance. This will ensure the best
results and maximum safety.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Field wires on the line side of the disconnect located inside the unit remain live, even when the
disconnect switch is off. Service and maintenance to incoming wiring cannot be performed until
the main remote disconnect is turned off, locked out and tagged.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety.
“Children should be supervised to ensure that they do not play with the appliance.”
WARNING
This appliance may contain UV-C LEDs
DO NOT OPERATE UV-C LAMPS OUTSIDE THE APPLIANCE
UV Light Hazard. Harmful to skin and eyes. Can cause temporary or permanent loss of vision.
Never look at the lamp while illuminated. To prevent exposure to ultraviolet light, be sure the
power is disconnected before servicing.
DO NOT touch UVC LEDs with bare hands
CAUTION
This appliance may contain an Ionizer
Ionizer generates high voltage. Make sure power is disconnected before cleaning the ionizer
brush heads.
Remove any accumulated dirt on the ionizer brush heads to prevent risk of flashover or fire.

Temspec Unit Ventilator IOM 2023-07-05
[4]
ELECTRICAL CONNECTIONS
Use Copper Supply Wires Only
Use Supply Wires Suitable for 90◦C
Our unit Ventilators are available in the following voltages: 120/1/60, 208/1/60, 240/1/60,
277/1/60, 208/3/60, 480/3/60, 480/3/60 + N
The electrical circuit in the unit ventilator is highly dependent on the controller and control sequence
that is being utilized. A copy of the electrical schematic can be found folded in a pouch inside of the
unit ventilator or in the final job submittal.
Access to power is through the top of the unit (unless ordered differently). The unit has a single point
connection at the junction box (comes with disconnect switch) located inside the unit either above or
below the electrical box. Junction box may be located on the rebate inside the unit if the electrical
enclosure is door mounted. A circuit breaker may be used instead of the disconnect depending on
the amperage.
The electrical wiring must be in accordance with the current applicable national and local codes. A
qualified electrician must carry out the work. The electrical power to the unit should be disconnected
by opening the remote disconnect device prior to opening the access panel. The wiring diagram shall
be followed thoroughly when making connections to the unit.
A conduit is to be field installed in the unit such that hazardous voltage wiring is protected until it is
terminated. In the junction box or electrical enclosure.
Line Voltage Connections
Connect power leads from the field disconnect to the pigtails provided with the disconnect at the
junction box located inside the appliance and ground at the green screw located inside the junction
box.
If a circuit breaker is used, terminate the field provided line leads directly at the circuit breaker. The
neutral line to be terminated at the power distribution block and ground at the lug located beside the
circuit breaker inside the electrical enclosure.
Type and Ratings of Fuses and Circuit Breakers
Up to 30A time delay fuses are used. Up to 3 pole 100A circuit breakers are used.
Grounding
The unit Ventilator must be grounded for field connections wires up to #10 AWG using the green
ground screw inside the junction box. If the field connection wires are larger than # 10 AWG, the
grounding point is a ground lug installed in the electrical enclosure.
Low Voltage Connections
There is a sheet metal barrier between line voltage and extra low voltage circuits inside the
electrical enclosure. Low voltage connections are to be made to the terminal block or a controller
mounted on the low voltage side of the electrical enclosure. The unit is equipped with 1/2 inch flex
metal conduit to segregate wires entering unit. A conduit termination port is provided on the
electrical enclosure.

Temspec Unit Ventilator IOM 2023-07-05
[5]
TYPICAL LAYOUTS
VUD 1200
CW
O.A. Outdoor Air
1. Supply air fan.
2. Hot water coil. Optional electric or steam
coil available.
3. DX cooling coil.
4. Drain pan.
5. Outdoor air damper.
6. Spring return mixed air damper actuator.
7. Filters.
SIDE SECTION
(Hot Water /
Chilled Water)
SIDE SECTION
(Split System DX)
6
S.A. Supply Air
21.5"
R.A.
8
21.5"
O.A.
5
4
3
2
1
7O.A.
9
HW
S.A.
8. Return air damper.
9. 2 pipe or 4 pipe (hot water coil can be
in the reheat position).
10. Ceiling tile.
11. Top extension (optional).
12. Coil access panel.
13. Hinged filter access panel.
14. Heavy duty return air grille.
FRONT ELEVATION
14
R.A.
R.A. Return Air
28"
Duct By
Others
10
11
12
13
4
S.A.
93"
H
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied.

Temspec Unit Ventilator IOM 2023-07-05
[6]
VUD 1600
CW
O.A. Outdoor Air
1. Supply air fan.
2. Hot water coil. Optional electric or steam
coil available.
3. DX cooling coil.
4. Drain pan.
5. Outdoor air damper.
6. Spring return mixed air damper actuator.
7. Filters.
SIDE SECTION
(Hot Water /
Chilled Water)
SIDE SECTION
(Split System DX)
6
S.A. Supply Air
23"
R.A.
8
23"
O.A.
5
4
3
2
1
7O.A.
9
HW
S.A.
8. Return air damper.
9. 2 pipe or 4 pipe (hot water coil can be
in the reheat position).
10. Ceiling tile.
11. Top extension (optional).
12. Coil access panel.
13. Hinged filter access panel.
14. Heavy duty return air grille.
FRONT ELEVATION
14
R.A.
R.A. Return Air
33"
Duct By
Others
10
11
12
13
4
S.A.
93"
H
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied.

Temspec Unit Ventilator IOM 2023-07-05
[7]
VUD 2000
O.A. Outdoor Air
S.A.
8
5
S.A. Supply Air
1. Dual supply air fans.
2. DX cooling coil.
3. Filters.
4. Spring return mixed air damper actuator.
5. Outdoor air damper.
6. Hot water coil. Optional electric or steam
coil available.
7. Drain pan.
SIDE SECTION
(Split System DX)
O.A.
23"
O.A.
R.A.
SIDE SECTION
(Hot Water /
Chilled Water)
23"
4
1
2
3
9
7
6CW
HW
S.A.
R.A. Return Air
8. Return air damper.
9. 2 pipe or 4 pipe (hot water coil can be
in the reheat position).
10. Ceiling tile.
11. Top extension (optional).
12. Coil access panel.
13. Hinged filter access panel.
14. Heavy duty return air grille.
FRONT ELEVATION
R.A. 14
44"
13
12
11
10
Duct By
Others
93"
H
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied.

Temspec Unit Ventilator IOM 2023-07-05
[8]
VUF 1200
O.A. Outdoor Air
SIDE SECTION
(Hot Water /
Chilled Water)
S.A. Supply Air
1. Hot water coil. Optional electric or steam
coil available.
2. DX cooling coil.
3. Drain pan.
4. Supply air fan.
5. Outdoor air damper.
6. Spring return mixed air damper actuator.
7. Filters.
SIDE SECTION
(Split System DX)
21.5"
R.A.
21.5"
3
5
6
O.A.
4
1
2
O.A.
7
8
S.A.
9
HW
CW
R.A. Return Air
8. Return air damper.
9. 2 pipe or 4 pipe (hot water coil can be
in the reheat position).
10. Double deflection supply air grille.
11. Coil access panel.
12. Hinged filter access panel.
13. Heavy duty return air grille.
FRONT ELEVATION
13
R.A.
28"
10
11
12
3
S.A. S.A.
93"
S.A.
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied.

Temspec Unit Ventilator IOM 2023-07-05
[9]
VUF 1500
S.A.
O.A. Outdoor Air
R.A.
S.A. Supply Air
1. DX cooling coil.
2. Dual supply air fans.
3. Filters.
4. Spring return mixed air damper actuator.
5. Outdoor air damper.
6. Hot water coil. Optional electric or steam
coil available.
7. Drain pan.
SIDE SECTION
(Split System DX)
O.A.
23"
O.A.
R.A.
SIDE SECTION
(Hot Water /
Chilled Water)
23"
4
2
1
3
58
7
6
S.A.
9
HW
CW
R.A. Return Air
8. Return air damper.
9. 2 pipe or 4 pipe (hot water coil can be
in the reheat position).
10. Double deflection grilles.
11. Coil access panel.
12. Hinged filter access panel.
13. Heavy duty return air grille.
FRONT ELEVATION
13
44"
12
11
10
S.A.
93"
S.A.
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied.

Temspec Unit Ventilator IOM 2023-07-05
[10]
VDF 1200
HW
O.A. Outdoor Air
SIDE SECTION
(Hot Water /
Chilled Water)
CW
SIDE SECTION
(Split System DX)
1. Return Air damper.
2. Outdoor air damper.
3. Supply air fan.
4. Hot water coil. Optional electric or
steam coil available.
5. Spring return mixed air damper actuator.
6. Filters.
7. Slab type DX cooling coil.
S.A. Supply Air
21.5"
8
7
21.5"
4
3
2
O.A.
1
6
5
R.A.
9
O.A.
8. Drain pan.
9. 2 pipe or 4 pipe (hot water coil can be
in the reheat position).
10. Heavy duty return air grille.
11. Hinged filter access panel.
12. Coil access panel.
FRONT ELEVATION
8
R.A. Return Air
S.A.
28"
S.A.
11
12
10
R.A.
93"
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied.

Temspec Unit Ventilator IOM 2023-07-05
[11]
HCD 1200
SIDE SECTION
O.A.
O.A. Outdoor Air
93"
Duct By
Others
OPTIONAL TOP O.A.
INTAKE DETAIL
1. Outdoor air damper.
2. Spring return mixed air damper actuator.
3. Return air damper.
4. Filters.
5. Heavy duty return air grille or duct collar.
6. Split DX or hot water/chilled water coil
(2 pipe or 4 pipe).
7. Drain pan. Drain pan is removable when
option for bottom access panels is selected.
R.A.
S.A. Supply Air
3
Duct By
Others
O.A.
31
1O.A.
5
R.A.
42
10" x 12"
Supply Air
Opening
ISOMETRIC VIEW
(shown with left side access panel)
8. Hot water coil for spilt system DX or heating
only units. Optional steam and electric
heater also available.
9. Supply air fan.
10. Mounting brackets (4 per unit).
11. Left or Right side hinged filter access panel.
Bottom hinged access panel also available.
12. Left or Right side hinged coil access panel.
Bottom hinged access panel also available.
R.A.
10
11
R.A. Return Air
12
10
28"
Duct By
Others
7 9
Optional
O.A. intake
location
6 8
Suspension
Rods By
Others
S.A. 21.5"
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied.

Temspec Unit Ventilator IOM 2023-07-05
[12]
HCD 1600
SIDE SECTION
O.A.
O.A. Outdoor Air
93"
Duct By
Others
OPTIONAL TOP O.A.
INTAKE DETAIL
1. Outdoor air damper.
2. Spring return mixed air damper actuator.
3. Return air damper.
4. Filters.
5. Heavy duty return air grille or duct collar.
6. Split DX or hot water/chilled water coil
(2 pipe or 4 pipe).
7. Drain pan. Drain pan is removable when
option for bottom access panels is selected.
R.A.
S.A. Supply Air
3
Duct By
Others
O.A.
3
1
1O.A.
5
R.A.
42
12" x 10"
Supply Air
Opening
ISOMETRIC VIEW
(shown with left side access panel)
8. Hot water coil for spilt system DX or heating
only units. Optional steam and electric
heater also available.
9. Supply air fan.
10. Mounting brackets (4 per unit).
11. Left or Right side hinged filter access panel.
Bottom hinged access panel also available.
12. Left or Right side hinged coil access panel.
Bottom hinged access panel also available.
R.A.
10
11
R.A. Return Air
12
10
33"
S.A.
Duct By
Others
7 9
Optional
O.A. intake
location
6 8
Suspension
Rods By
Others
S.A. 23"
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied.

Temspec Unit Ventilator IOM 2023-07-05
[13]
VER 1800
SA = Supply Air
VA = Ventilation Air
ECA = Economizer Air
RA = Return Air
EA = Exhaust Air
ITEM NO.
DESCRIPTION
ITEM NO.
DESCRIPTION
ITEM NO.
DESCRIPTION
1.
Evaporator Coil
8.
ERV Exhaust Filter
15.
Hot Water Coil
2.
Drain Pan
9.
Powered Exhaust Damper and Actuator
16.
Supply Air Fan
3.
100% Economizer OA Damper
10.
ERV O.A. Filter
17.
LH Hinged Access Panel
4.
Modulating damper actuator.
11.
RA Actuator
18.
Removable Access Panel
5.
ERV Damper with Actuator.
12.
RA Damper
19.
Heavy Duty RA Grille
6.
ERV Exhaust Fan
13.
Mixed Air Filters
7.
ERV Enthalpy Wheel
14.
Electrical Box/Controls Enclosure
NOTE: The component arrangement shown above may vary slightly from that in the unit supplied

Temspec Unit Ventilator IOM 2023-07-05
[14]
VGB 1600
O.A. Outdoor Air
11
10
1. Supply air fan.
2. Optional electric coil.
3. Control / electrical enclosure.
4. Primary coil (DX or chilled water).
5. Drain pan.
6. Outdoor air coil (DX or chilled water).
7. Return air filter.
O.A.
9
5
23"
S.A. Supply Air
SIDE SECTION
12
R.A.
8
7
6
4
1
2
S.A.
3
5
8. Heavy duty return air grille.
9. Outdoor air fan.
10. Outdoor air filter.
11. Outdoor air damper.
12. Optional electric freeze protection.
13. Coil access panel.
14. Return air access panel.
FRONT ELEVATION
R.A. Return Air
33"
14
13
S.A.
93"
Note: The component arrangement shown above may vary slightly from that in the unit supplied

Temspec Unit Ventilator IOM 2023-07-05
[15]
HGB 1600
SIDE SECTION
ISOMETRIC VIEW
(shown with left side access panel)
O.A. Outdoor Air
O.A.
1. Outdoor air damper.
2. Outdoor air filter.
3. Outdoor air fan.
4. Heavy duty return air grille or duct collar.
5. Outdoor air chilled water or DX coil.
6. Return air filter.
7. Primary chilled water or DX coil.
S.A. Supply Air
12
13
R.A.
Duct By
Others
O.A.
72 3 15
R.A. 46 8
93"
12" x 10"
Supply Air
Opening
8. Drain pan. Drain pan is removable when
option for bottom access panels is selected.
9. Electrical / control enclosure.
10. Optional Electric heater.
11. Supply air fan.
12. Mounting brackets (4 per unit).
13. Left or Right side hinged filter access panel.
14. Left or Right side hinged coil access panel.
14
12
S.A.
33"
R.A. Return Air
911 Duct By
Others
10
Suspension
Rods By
Others
S.A. 23"
Note: The component arrangement shown above may vary slightly from that in the unit supplied

Temspec Unit Ventilator IOM 2023-07-05
[16]
VUD Face and Bypass
Note: The component arrangement shown above may vary slightly from that in the unit supplied
Note: The cabinet size remains the same for Face and Bypass control or Valve control units

Temspec Unit Ventilator IOM 2023-07-05
[17]
OPERATION
Typical Modes of Operation
The following are typical modes of operation for a classroom unit ventilator. Please refer to the
manual provided by the control’s contractor for a more specific controls sequence.
Unoccupied Heating/Cooling
During Unoccupied heating/ cooling the outdoor air damper, wheel air damper (if applicable) and
powered exhaust damper (if applicable) are fully closed. The powered exhaust fan (if applicable) and
energy recovery wheel (if applicable) are off. The space is maintained at a setback temperature by
modulating the control valve actuator or face and bypass damper actuator or outdoor condensing unit
or electric heat as needed. The supply fan should only run when heating or cooling is required.
Occupied Heating/ Cooling
During Occupied heating/ cooling for standard Unit Ventilators (VUD, VUF, VDF, HCD) the outdoor
air damper will modulate to the minimum required position. If the unit has powered exhaust, the
powered exhaust damper will open, and the powered exhaust fanwill turn on. The spacetemperature
is maintained by modulating the control valve actuator or face and bypass damper actuator or outdoor
condensing unit or electric heat as needed. The supply fan will run at all times.
If the unit is equipped with an Energy Recovery Wheel, the wheel air damper will open, the wheel will
start spinning andthe powered exhaust fan will start. The economizer damper will remain closed. The
space temperature is maintained by modulating the control valve actuator or electric heat as needed.
The supply fan will run at all times.
Economizer (up to 100% outdoor air)
Economizer mode is activated when the controller compares the Outdoor Air Enthalpy to the Mixed
Air Temperature and determines that the outdoor air is cool and dry enough to properly cool the
space. During this mode the outdoor air damper and return air damper will modulate to maintain the
space temperature.
If the unit is equipped with an Energy Recover Wheel, the wheel will stop, and the wheel air damper
will close. When the economizer damper opens, the exhaust air damper will open, and the powered
exhaust fan will run at high speed for 100% powered exhaust operation.
Dehumidifying Mode (VGB/HGB Series)
During occupied cooling, the Dehumidifying AHU can enter a dehumidifying mode. In this mode
(normally when the outdoor air is above 55°F) water is diverted to the outdoor coil to cool and remove
moisture from the entering outdoor air.
Freeze Protection
For units with a water coil, some type of freeze protection is usually implemented. This can be by
either a low limit temperature control (auto reset or manual reset) or by using an air sensor and
programming from the controller. When the mixed air temperature is determined to be too low, then
the outdoor air damper will close, and the control valve will fully open. In some cases, the fan will
also shut down until the temperature returns to normal levels. The standard hot water actuator is fail
open.

Temspec Unit Ventilator IOM 2023-07-05
[18]
Standard Piping
The following are typical hot water piping schematics for a unit ventilator. Please refer to the Job
Submittal for a more specific layout.
Hot Water / Chilled Water with 2-way Control
Note: The component arrangement shown above may vary slightly from that in the unit supplied
Hot Water / Chilled Water with 3-way Control
Note: The component arrangement shown above may vary slightly from that in the unit supplied

Temspec Unit Ventilator IOM 2023-07-05
[19]
Hot Water with Reheat Configuration
Note: The component arrangement shown above may vary slightly from that in the unit supplied