Service Model Number Description .................. 4 – 14
General Information ............................................... 15
Literature Contents
Receiving and Handling
Warnings and Cautions Explanations
Unit Information ............................................. 16 – 17
Single-Duct Units
Dual-Duct Units
Fan-Powered and Low-Height Units
Unit Installation .............................................. 18 – 31
Hanging Bracket Locations
Unit Weights
Water Coil Connections
Unit Accessibility
Clearances
Actuator Mounting
Unit Setup ...................................................... 32 – 46
Flow Sensor ∆P vs. Airflow Delivery
Maximum Fan Motor Amperage
(SCR) Motor Speed Control Adjustment Procedure
Electrically Commutated Motor (ECM)
ECM CFM Tables
WARNING: ALL INSULATED UNITS
(except closed-cell foam insulation)
CONTAIN FIBERGLASS WOOL! Read
this literature prior to installation for
proper instruction. Disturbing the
insulation in this product during
installation, maintenance or repair will
expose you to airborne particles of
glass wool fibers and ceramic fibers
known to the state of California to
cause cancer through inhalation. Glass
wool fibers may also cause respiratory,
skin or eye irritation.
Digit 19—Outlet Plenum (Connection is
Slip & Drive)
0None
A1 Outlet RH
B1 Outlet END
C1 Outlet LH
D2 Outlets, 1 RH, 1 END
E2 Outlets, 1 LH, 1 END
F2 Outlets, 1 RH, 1 LH
H3 Outlets, 1 LH, 1 RH, 1 END
J4 Outlets, 1 LH, 1 RH, 2 END
Note
:
See unit drawings for outlet sizes/
damper information.
Digit 20—Not Used
0N/A
Digit 21—Water Coil
0None
11-Row
22-Row
Digit 22—Electrical Connections (VCCF,
VCWF can be flipped in the field to
achieve opposite-hand connection)
LLeft (Airflow hitting you in the
face)
RRight (Airflow hitting you in the
face)
0Opposite side connection – coil
and control
Service Model
Number Description
Digit 23—Transformer
0None
1120/24 volt (50 VA)
2208/24 volt (50 VA)
3240/24 volt (50 VA)
4277/24 volt (50 VA)
5480/24 volt (50 VA)
6347/24 Volt (50 VA)
7575/24 Volt (50 VA)
8380/24 Volt (50 VA)
Note: For VCEF units with transformers
the VA depends on the staging, control,
and contactor type (ranges are 40 VA
to 75 VA)
Digit 19—Outlet Plenum (Connection is
slip & drive)
0none
A1 outlet–RH
B1 outlet–END
C1 outlet–LH
D2 outlets–1 RH, 1 END
E2 outlets–1 LH, 1 END
F2 outlets–1 RH, 1 LH
G2 outlets - END
H3 outlets–1 LH, 1 RH, 1 END
J4 outlets–1 LH, 1 RH, 2 END
Note: See unit drawings for outlet sizes/
damper information.
Digit 20—Not Used
0N/A
Digit 21—Not Used
0N/A
Digit 22—Not Used
0N/A
Digit 23—Transformer
0None
1120/24 volt (50 VA)
2208/24 volt (50 VA)
3240/24 volt (50 VA)
4277/24 volt (50VA)
5480/24 volt (50 VA)
6347/24 volt (50 VA)
7575/24 volt (50 VA)
Digit 24—Disconnect Switch
0None
WWith Toggle
Digit 25—Power Fuse
0None
WWith
6
VAV-SVN01E-EN
Fan-Powered Parallel Units
Digit 1, 2—Unit Type
VPVariTrane fan-powered parallel
Digit 3—Reheat
CCooling Only
EElectric Heat
WHot Water Heat
Digit 4—Development Sequence
FSixth
Digit 5, 6—Primary Air Valve
055" inlet (350 max cfm)
066" inlet (500 max cfm)
088" inlet (900 max cfm)
1010" inlet (1400 max cfm)
1212" inlet (2000 max cfm)
1414" inlet (3000 max cfm)
1616" inlet (4000 max cfm)
Digit 7, 8—Secondary Air Valve
00N/A
Digit 9—Fan
P02SQ fan (500 nominal cfm)
Q03SQ fan (1100 nominal cfm)
R04SQ fan (1350 nominal cfm)
S05SQ fan (1550 nominal cfm)
T06SQ fan (1850 nominal cfm)
U07SQ fan (2000 nominal cfm)
Digit 10, 11—Design Sequence
J0 Design Sequence (Factory
assigned)
Digit 12, 13, 14, 15—Controls
ENON No controls, field-installed DDC
or analog
ENCL ENON with controls enclosure
PNON No controls, field-installed
pneumatic
DD00 Trane elec actuator only
DD01 DDC – cooling only
DD02 DDC – N.C. on/off water control
DD03 DDC – prop hot water control
DD04 DDC – on/off electric heat
control
DD05 DDC – pulse-width modulation
electric heat control
DD07 DDC – N.O. on/off hot water
control
DD11 LonTalk DDC Controller—
Coolingonly
DD12 LonTalk DDC Controller w/ N.C.
on/off hot water control
DD13 LonTalk DDC Controller w/
proportional hot water control
DD14 LonTalk DDC Control–on/off
electric heat control
Service Model
Number Description
DD15 LonTalk DDC Controller w/
pulse-width modulation electric heat
control
DD17 LonTalk DDC Controller w/ N.O.
on/off hot water control
FM00 FM customer actuator & control
FM01 FM Trane actuator w/ customersupplied controller
VMA2 FM Johnson Controls
VMA-1420
PWR1 FM Seimens 540-100 w/
GDE131.1P actuator
PWR4 FM Seimens 540-100 w/ Trane
actuator
PWR5 FM Seimens 540-100 w/
GDE131.1U actuator
AT01 FM Automated Logic U341V+
AT02 FM Automated Logic U141V+
EI05Analog – fan-powered parallel
with optional on/off reheat
PN00 PN – N.O. Trane pneumatic
actuator, R.A. stat
PN05 PN – N.O. PVR, R.A. stat
Notes:
N.C. =Normally-closed
N.O =Normally-opened
DA Stat = Direct-acting pneumatic t-stat
(by others)
RA Stat = Reverse-acting pneumatic
t-stat (by others)
PN =Pneumatic
FM =Factory installation of customer-
0None
124-volt magnetic
224-volt mercury
3PE with magnetic
4PE with mercury
Digit 32—Airflow Switch
0None
WWith
Service Model
Number Description
8
VAV-SVN01E-EN
Fan-Powered Series Units
Digit 1, 2—Unit Type
VSVariTrane fan-powered series
Digit 3—Reheat
CCooling Only
EElectric Heat
WHot Water Heat
Digit 4—Development Sequence
FSixth
Digit 5, 6—Primary Air Valve
044" inlet (225 max cfm)
055" inlet (350 max cfm)
066" inlet (500 max cfm)
088" inlet (900 max cfm)
1010" inlet (1400 max cfm)
1212" inlet (2000 max cfm)
1414" inlet (3000 max cfm)
1616" inlet (4000 max cfm)
Digit 7, 8—Secondary Air Valve
00N/A
Digit 9—Fan
P02SQ fan (700 nominal cfm)
Q03SQ fan (1200 nominal cfm)
R04SQ fan (1550 nominal cfm)
S05SQ fan (1900 nominal cfm)
T06SQ fan (2600 nominal cfm)
U07SQ fan (3000 nominal cfm)
Fan Note: See fan curves for specific
airflows
Digit 10, 11—Design Sequence
J0 Design Sequence
(Factory assigned)
Digit 12, 13, 14, 15—Controls
ENON No controls, field-installed DDC
or analog
ENCL ENON with control enclosure
PNON No controls, field-installed
pneumatic
DD00 Trane elec actuator only
DD01 DDC – cooling only
DD02 DDC – N.C. on/off water control
DD03 DDC – prop hot water control
DD04 DDC – on/off electric heat
control
DD05 DDC – pulse-width modulation
electric heat control
DD07 DDC N.O. on/off hot water
control
DD11 LonTalk DDC Controller—
Cooling only
DD12 LonTalk DDC Controller w/ N.C.
on/off hot water control
Service Model
Number Description
DD13 LonTalk DDC Controller w/
proportional hot water control
DD14 LonTalk DDC Controller–on/off
electric heat control
DD15 LonTalk DDC Controller w/
pulse-width modulation electric
heat control
DD17 LonTalk DDC Controller w/ N.O.
on/off hot water control
FM00 FM customer actuator & control
FM01 FM Trane actuator w/ customer-
supplied controller
VMA2 FM Johnson controls VMA-1420
PWR1 FM Seimens 540-100 w/
GDE131.1P actuator
PWR4 FM Seimens 540-100 w/ Trane
actuator
PWR5 FM Seimens 540-100 w/
GDE131.1U actuator
AT01 FM Automated Logic U341V+
AT02 FM Automated Logic U141V+
EI71Analog fan-powered series
with optional on/off reheat
PN00 PN – N.O. Trane pneumatic
actuator, R.A. stat
PN51 PN – N.O. PVR, duct pressure
switch, R.A. stat
PN52 PN – N.O. PVR, dual pressure
main, R.A. stat
Notes:
N.C. =Normally-closed
N.O. =Normally-opened
DA Stat = Direct-acting pneumatic t-stat
(by others)
RA Stat = Reverse-acting pneumatic t-stat
(by others)
PN =Pneumatic
FM =Factory installation of customer-
0None
124-Volt magnetic
224-Volt mercury
3PE with magnetic
4PE with mercury
Digit 32—Air Flow Switch
0None
WWith
14
VAV-SVN01E-EN
General
WARNING
CAUTION
CAUTION
Information
Literature Contents
This manual describes the installation
of VariTrane VAV units with recommended wiring, piping, and mounting
of Single-Duct, Dual-Duct, Fan-Powered, Low-Height terminal units and
diffusers.
Receiving and Handling
VariTrane Units are shipped completely
assembled with the exceptions of
optional attenuators for fan-powered
units and accessories.
Upon receiving the equipment,
complete the following:
y Locate the nameplate and refer to the
model and sales order number and
check that the correct units have been
delivered.
y Inspect the control enclosures and air
valve casing for dents or punctures.
y Verify that all options have been
included, such as filters, controls,
heating coils, water valves, etc. Also
check that the unit voltages agree with
the building parameters.
y Manually rotate the fan (if applicable) to
assure that there are no obstructions
within the housing.
y Claims for in-transit damage must be
filed immediately with the delivery
carrier.
y For hot water re-heat units, check the
coil fins and make sure that coils are
not damaged.
y Locate and verify that the correct zone
sensors are with the order. These will be
marked with an orange “Accessories
Enclosed” label. Store in a secure
location until needed. Accessories lost
at the jobsite are NOT covered by
Trane’s warranty.
y If a discrepancy occurs between what
was ordered and what is received,
contact you local Trane representative
immediately.
y Read the appropriate section in this
manual for installation procedures prior
to actual starting of equipment.
Upon receiving the equipment, please
inspect each unit and components for
external or internal damage. Refer to
the bill of lading to insure all equipment
and accessories have been received.
Contact your local Trane sales
representative and notify the trucking
company immediately of any short ship
or damaged equipment.
NOTICE:
Warnings and Cautions appear at appropriate sections throughout this manual.
Read these carefully.
WARNING
– Indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury.
CAUTION
– Indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate injury. It may also be used
to alert against unsafe practices.
CAUTION
– Indicates a situation that may result in equipment or
property-damage-only accidents.
VAV-SVN01E-EN 15
Unit
Information
Single-Duct Units
The basic unit consists of a sheet metal
casing with an air valve, which is used
to modulate the air being delivered into
the occupied zone. The unit is designed
to modulate either cooling or heating
air between the temperatures of 40°F
and 140°F. Air enters the air valve
through the round or rectangular inlet
and exits into the sheet metal casing to
be distributed to the zone either
through integral round outlets in the
casing or through rectangular duct
attached to the discharge of the unit.
The basic unit can also be ordered with
factory-mounted electric or hot water
heating coils attached to the discharge.
(See Figure 1.)
These re-heat units are used primarily
to reheat air-to-zone temperature when
the load in the occupied space is low.
Primary air is modulated through the
VariTrane air valve by rotating the
damper blade. All air valves have a
round/rectangular inlet for easy fit-up
with incoming ductwork.
Figure 1 – Typical Single-Duct Units
VCCF
VCWF
VCEF
Dual-Duct Units
Dual-duct units provide two air valves:
one as heating primary air and the
other as cooling primary air. Both
discharge into the common outlet,
which leads to the zone being controlled. (See Figure 2.)
The units are provided with a slip and
drive rectangular duct connection or
can be ordered with integral outlet
plenum.
Sequencing of the hot and cold air
valve is dependent upon job
requirements. One typical control is the
valves working in conjunction with each
other to respond to zone temperature.
When the cooling valve becomes fully
closed or reaches a specified minimum,
then the heating valve will begin to
modulate or vice versa. The typical
result is that air flowing to the zone
varies from the maximum down to a
minimum and back up to a maximum
as the load varies and as the controls
would cause one air valve to close and
the other to open.
Another typical application is when the
unit provides a constant volume to the
zone. When the zone sensor is tied
directly to the heating valve, it will
modulate the heating valve according
to the zone temperature.
When the heating valve is fully closed
or there is a call for cooling in the zone,
the cooling valve will be at constant
supply. As the space becomes too cool,
the heating valve will modulate open,
decreasing the cooling valve flow. The
typical result is that the air flowing into
the zone stays at a constant flow
whether the unit is heating or cooling.
Figure 2 – Typical Dual-Duct Unit
VDDF
16
VAV-SVN01E-EN
Unit
Information
Fan-Powered and Fan-Powered
Low-Height Units
VariTrane fan-powered and low-height
fan-powered units can be either parallel
or series, with or without re-heat. (See
Figure 3.)
The fan on a series unit runs
continuously whenever the main air
handler unit is in operation. There are
various options for starting the fan. The
fan can be started three ways: 1)
remotely, 2) by a duct pressure switch,
or 3) by a combination of both. The
particular fan control method may vary
from unit to unit, depending upon job
needs.
Typically, the heater is off while the air
valve modulates primary air and
responds to zone temperature. If zone
temperature decreases to the point
where a decrease in primary air will not
maintain the desired temperature, the
re-heat will be activated to increase the
temperature of the discharge air.
On a parallel unit, the VariTrane air valve
delivers primary cooling air to the unit
outlet. When the space temperature
decreases beyond air valve control, the
fan is turned on as the first stage of
heat. The fan delivers plenum air from
above the occupied space to the unit
outlet, which is mixed with primary air
and delivered to the occupied space.
VariTrane fan-powered unit fan sizes
02SQ–05SQ and 08SQ–10SQ were
performance tested at .12 in. w.g. and
sizes 06SQ and 07SQ were tested at .15
in. w.g. Units are not designed to
operate unducted and below these
tested static pressures.
Note: Fan-powered units are available
with rectangular discharge connection
only. The optional heater is mounted on
the discharge of the unit. Hot water coils
are connected to either the plenum inlet
or on the discharge on parallel units, and
to the discharge of series units.
Figure 3 – Typical Fan-Powered Units
VSCF
VPCF
Note: Either the fan, the air valve, or both
can deliver airflow into the occupied
space. In order to prevent primary airflow
from exiting through the fan when the
fan is not running on a parallel unit, a
back draft damper is provided. When the
fan is not running, the efficiency of this
system is the same as a standard singleduct VAV unit.
Typically, the control systems applied to
parallel units cause the air valve to
close to zero or a minimum flow before
the fan is activated. After the fan is
activated, the optional heat will be
activated upon further reduction in
zone temperature. Therefore, minimal
primary air is mixed with the heated air.
VAV-SVN01E-EN 17
VSEF
VSWF
VPEF
VPWF
Unit
Installation
Due to their weight, the VAV terminal
units should be suspended from the
uppermost ceiling, independent of the
false ceiling grid. Suspension devices
are to be supplied by the installer. Units
must be installed level and upright.
Failure to level the unit properly may
prevent proper operation of the
controls and/or terminal unit. Units are
not designed to be installed vertically.
Consequently, this will also void the UL
ratings and any warranty on the unit.
Single-Duct
Depending upon the size and weight of
the single-duct unit, it may be capable
of being supported by the ductwork
that is connected to it. No hanger
brackets are provided on these units
since the unit should be supported by
means of a hanger strap. The hanger
strap should be secured directly to the
unit casing as shown in Figure 4.
For cooling only single-duct units or
single-duct units with hot water coil, the
unt may be rotated 180° for opposite
side connections.
For units with electric heat, the unit
must be ordered from the factory
designating either right- or left-hand
connections.
Dual-Duct
Dual-duct units should be supported by
either hanger straps or by using a
threaded rod in conjunction with the
hanger brackets that are provided on
the unit. See Figure 5.
Figure 5
Dual-Duct Hanger Bracket Locations
AIR
VALV E
COOLING
AIR
VALV E
HEATING
CA
B
Figure 4
Single-Duct Hanging
Recommendations
18
Inlet Size
5" thru 10"
12" thru 16"
TOP VIEW
BCA
25.25" (641 mm)23.154" (588 mm)
25.154" (639 mm)1.376" (35 mm)
37.25" (946 mm)
1.376" (35 mm)
VAV-SVN01E-EN
Unit
Installation
Fan-Powered (Standard and LowHeight)
Fan-powered units should be supported by either hanger straps or by
using a threaded rod in conjunction
with the hanger brackets that are
provided on the unit. Care should be
exercised to insure that the hanging
straps do not block the side access
panel. See Figures 6–13.
Figure 6
Parallel Hanger Bracket Locations Sizes
C
Wate r
Coil
TOP VIEW
Parallel Cooling & Hot Water
Flow Ring
Tubing
FAN SIZE
02SQ
03SQ, 04SQ, 05SQ
06SQ, 07SQ
26.75" (679 mm)
29.75" (756 mm)
36.75" (933 mm)
Primary
Airflow
Air
Valv e
Airflow
Discharge Outlet
ADE
26.75" (679 mm)
26.75" (679 mm)
26.75" (679 mm)
Optional Attenuator
B
Airflow
Plenum Inlet
Field Installed
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
EF
C
A
B
D
3.25" (83 mm)
3.25" (83 mm)
3.25" (83 mm)
20.00" (508 mm)
20.00" (508 mm)
20.00" (508 mm)
F
38.95" (989 mm)
38.95" (989 mm)
38.95" (989 mm)
C
Airflow
Plenum Inlet
Optional Attenuator
Field Installed
A
EF
D
TOP VIEW
Parallel Electric Heat
Flow Ring
Tubing
Primary
Airflow
Air
Valv e
Terminal Box
Heater
Airflow
Discharge Outlet
43.546
(1106 mm)
VAV-SVN01E-EN 19
B
Figure 7
Series Hanger Bracket Locations
Unit
Installation
Flow Ring
Tubing
E
2.
Fan Inlet w/o
Attenuator
1.625"
(41 mm)
FAN SIZE
18.75" (476 mm)
03SQ, 04SQ
05SQ27.25" (692 mm)
06SQ, 07SQ
20.75" (527 mm)
27.25" (692 mm)
Series Electric Heat
A
Air
Valve
Wate r
Coil
ADE
TOP VIEW
B
26.75" (679 mm)02SQ
26.75" (679 mm)
26.75" (679 mm)
26.75" (679 mm)
B
C
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
C
3.25" (83 mm)
3.25" (83 mm)
3.25" (83 mm)
3.25" (83 mm)
Flow Ring
Tubing
TOP VIEW
Series Cooling & Hot Water
D
1.
1.
All attenuators are the same length and width.
2.
Sizes 01 and 02 units are smaller than attenuators.
(Elec. Heat Only)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
AB
Air
Valve
35.154 (740 mm)
41.154" (1041 mm)
41.154" (1041 mm)
41.154" (1041 mm)
C
Optional Attenuator
Field Installed
20.132" (511 mm)
23.875 (606 mm)
29.875" (759 mm)
29.875" (759 mm)
Airflow
Plenum Inlet
F
D
G
Fan Inlet w/o
Attenuator
Electric
19.00"
(483 mm)
Heater
F
20
C
B
VAV-SVN01E-EN
Unit
Installation
Figure 8
Low-Height Parallel 08SQ/09SQ w/ Hot Water or Electric Heat
31.65"
(804 mm)
Airflow
(330 mm)
Primary
Airflow
13.00"
23.90"
(607 mm)
Optional Attenuator
Field Installed
Plenum Inlet
19.86"
(504 mm)
24.30"
(617 mm)
Airflow
Discharge Outlet
23.10"
(587 mm)
13.80"
(350 mm)
3.00"
(76 mm)
4.00"
(102 mm)
minal Box
Ter
3.35"
(85 mm)
13.00"
(330 mm)
Primary
Airflow
Heater
Airflow
Discharge Outlet
23.10"
(587 mm)
TOP VIEW
Optional Attenuator
23.90"
(607 mm)
Field Installed
13.80"
(350 mm)
31.65"
(804 mm)
Airflow
Plenum Inlet
4.00"
(102 mm)
19.86"
(504 mm)
24.30"
(617 mm)
3.35"
(85 mm)
TOP VIEW
VAV-SVN01E-EN 21
Figure 9
Low-Height Parallel10SQ
Unit
Installation
1.625"
(41 mm)
Flow Ring
Tubing
Primary
Airflow
Air
Valve
38.95"
(989 mm)
Plenum
Inlet
5.625"
(143 mm)
38.75"
(984 mm)
Optional Heater
Airflow
Discharge Outlet
Terminal Box
41.137"
(1045 mm)
5.625"
(143 mm)
TOP VIEW
22
VAV-SVN01E-EN
Unit
Installation
Figure 10
Low-Height Series 08SQ/09SQ w/ Hot Water or Electric Heat
31.65"
(804 mm)
4.00"
(102 mm)
10.13"
(257 mm)
Primary
Airflow
Air
Valve
(686 mm)
Water
Coil
Airflow
20.00"
(508 mm)
27.00"
12.85"
(326 mm)
Optional Attenuator
Field Installed
TOP VIEW
Airflow
Plenum Inlet
3.35"
(85 mm)
34.30"
(871 mm)
3.35"
(85 mm)
4.00"
(102 mm)
19.86"
(504 mm)
10.13"
(257 mm)
Primary
Airflow
Air
Val ve
12.85"
(326 mm)
31.65"
(804 mm)
Optional Attenuator
Field Installed
Airflow
Plenum Inlet
3.35"
(85 mm)
19.86"
(504 mm)
34.30"
(871 mm)
3.35"
(85 mm)
Optional
Electric Heater
Airflow
20.00"
(508 mm)
27.00"
(686 mm)
TOP VIEW
VAV-SVN01E-EN 23
Unit
Installation
Figure 11
Low-Height Series 10SQ w/ Hot Water or Electric Heat
19.86"
(504 mm)
31.65"
(804 mm)
Optional Attenuator
Field Installed
3.50"
(89 mm)
19.45"
(494 mm)
Airflow
Plenum Inlet
10.12"
(257 mm)
Primary
Airflow
Airflow
Discharge Outlet
42.00"
(1067 mm)
19.86"
(504 mm)
19.45"
(494 mm)
Airflow
Plenum Inlet
31.65"
(804 mm)
Optional Attenuator
Field Installed
(89 mm)
31.65"
(804 mm)
Optional Attenuator
Field Installed
3.50"
3.35"
(85 mm)
30.30"
(770 mm)
3.35"
(85 mm)
TOP VIEW
Plenum Inlet
19.45"
(494 mm)
Airflow
19.86"
(504 mm)
10.12"
(257 mm)
Primary
Airflow
19.45"
(494 mm)
Airflow
Plenum Inlet
31.65"
(804 mm)
Optional Attenuator
Field Installed
3.35"
(85 mm)
19.86"
(504 mm)
30.30"
(770 mm)
Plenum Area
Terminal Box
Optional
Heater
1.92"
(49 mm)
3.50"
(89 mm)
Airflow
Discharge Outlet
42.00"
(1067 mm)
24
(85 mm)
TOP VIEW
3.50"
(89 mm)
3.35"
VAV-SVN01E-EN
Unit
Installation
Figure 12
Attenuator Installation—Parallel Units
1. Attach attenuator to unit as shown with provided mounting brackets.
MOUNTING BRACKET
OPTIONAL ATTENUATOR
FIELD INSTALLED
Note: Bottom bracket not shown. Bottom bracket to be installed in same orientation on
bottom of unit.
VAV-SVN01E-EN 25
Unit
Installation
Figure 13
Attenuator Installation—Series Units
1. Attach attenuator to unit as shown with provided mounting brackets.
MOUNTING BRACKET
OPTIONAL ATTENUATOR
FIELD INSTALLED
Note: Bottom bracket not shown. Bottom bracket to be installed in same
orientation on bottom of unit.
26
VAV-SVN01E-EN
Unit
Installation
Figure 14
Attenuator Installation—Low-Height Parallel Units
1. Attach attenuator to unit as shown with provided mounting brackets.
MOUNTING BRACKET
OPTIONAL ATTENUATOR
FIELD INSTALLED
Note: Bottom bracket not shown. Bottom bracket to be installed in
same orientation on bottom of unit.
VAV-SVN01E-EN 27
Unit
Installation
Figure 15
Attenuator Installation—Low-Height Series Units
1. Attach attenuator to unit as shown with provided mounting brackets.
MOUNTING BRACKET
OPTIONAL ATTENUATOR
FIELD INSTALLED
MOUNTING BRACKET
OPTIONAL ATTENUATOR
FIELD INSTALLED
OPTIONAL ATTENUATOR
FIELD INSTALLED
MOUNTING BRACKET
Note: Bottom bracket not shown. Bottom bracket to be installed in same orientation on bottom of unit.
All VariTrane units should be provided
with a minimum of 1.5-duct diameters
of straight duct prior to the inlet of the
unit. It is recommended that at least 48
inches of straight duct be provided
from the discharge of the units prior to
any take-offs or transitions. This is a
requirement for electric heat fanpowered units used in
applications with 100%
downward discharge.
Note: In order to maintain the UL rating
for VariTrane electric coils, there must be
four feet of straight unlined ductwork
downstream of the reheat coil prior to
any diffuser takeoffs.
After all connections are made, check
that the entire ductwork system is
airtight. In some high-pressure
systems, duct sealer may be necessary.
Provide insulation around the entire
inlet collar (all the way to the unit
casing).
Use caution not to damage the flow
tubes when making ductwork
connections or insulating.
Cut “slits” in the insulation for the flow
tubes and secure with duct tape.
If the unit is to be installed in a location
with high humidity, external insulation
around the heating coil should be
installed as required.
Water Coil Connections
Water coil piping connections will be
3/8” or 7/8” OD.
If necessary, you can change the coil
connection from left-handed to righthanded (and vice-versa) by
disconnecting the coil from the unit
and rotating the coil “like a steering
wheel” 180°.
The inlet piping should always be
connected to the bottom connection of
the coil regardless of handedness.
Care should be taken to properly
support the water coil piping
connections while connecting the
adjoining pipe.
It is recommended that piping to the
water coil should be done after fieldmounted controls, external insulation,
and ductwork connections have been
completed.
Do not connect water valve or pipe
extensions to the water coil
connections unless supported.
Unit Accessibility
Single-duct and dual-duct units
provided with hot water reheat have an
access panel located on the side of the
water coil. All other single-duct and
dual-duct units are provided without
access, as all functioning components
are external to the unit.
Fan-powered terminals are provided
with a sliding side access.
Low-height terminal units have a
removable bottom panel.
Clearances
For proper service, it is recommended
that at least 36” of side clearance be
provided to service and access singleduct and dual-duct terminals units.
Fan-powered VAV units have a plenum
inlet that must be clear of obstructions.
Allow at least 36” of clearance in front
of the side access and plenum opening.
Low-height fan-powered terminals
require the same plenum clearance
requirement that applies to the
standard fan-powered units. However
the access to the internal components
is located on the bottom of the unit.
It is also recommended that 6” of
clearance be provided to the top and
bottom of all the units.
Note: The minimum clearance for
controls and heater controls should be
36” for all models except units with 575volt electric heaters, which require 48” of
clearance. NEC and/or local codes
override all clearance requirements.
Actuator Mounting
Trane offers a factory-mounted actuator
with a 90-second drive time. The
actuator drives 1 degree per second. A
field-installed actuator may be used if
desired. The actuator shaft has a ½-inch
diameter and is designed to travel
clockwise to close the damper and
counter-clockwise to open the damper.
There is an indicator on the end of the
actuator shaft that can be used to
determine the position of the damper.
CAUTION
Equipment Damage
Note: When installing or replacing the
actuator tighten the actuator set screw
per the manufacturer’s instructions.
Failure to follow the manufacturer’s
specifications may result in unit
malfunction.
VAV-SVN01E-EN 31
Unit
Setup
Chart 2 – Flow Sensor Delta P vs. Airflow Delivery
In order to make units more convenient
and efficient to balance, an SCR
(silicone control rectifier) is provided as
standard on all fan-powered units.
The SCR is located on the side of the
fan control box. To adjust the speed of
the motor, the external knob must be
rotated either clockwise or
counterclockwise depending on the
desired speed adjustment.
There is an internal potentiometer
(Figure 14) setting on the SCR controller
that can be accessed by removing the
control box cover. This internal
potentiometer is set at the factory to the
specific motor voltage.
It may be necessary to adjust this in the
field depending on the building’s power
factor.
WARNING
Hazardous Voltage!
Disconnect all electric power, including
remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the power cannot be
inadvertently energized. Failure to
disconnect power before servicing
could result in death or serious injury.
Figure 17 – Internal Potentiometer
120 v
Max
208 v–
277 v
347 v
DO NOT SET THIS
POTENTIOMETER
BELOW THE VOLTAGE
OF THE FAN MOTOR.
NOTE: Do not set this potentiometer
below the voltage of the fan motor.
Electrically Commutated Motor (ECM)
Trane offers an energy efficient ECM
motor as a motor option. Balancing of
an ECM motor is accomplished
through electronic control adjustments
on the ECM control board (see Figure
15). Potentiometer settings for a
multitude of CFM settings are given in
Charts 4–15. Other potentiometer
settings can be determined either by
interpolating from these tables or by
using the following equation:
CFMsetting = CFMmin +
{(Potentiometer Setting) x [(CFMmax CFMmin)/100]}
There is an LED on the ECM control
board, which will blink one time for
every 100 CFM of motor setting. For
example, the LED on a unit set for 790
CFM will blink 7 times. The LED on a
unit set for 800 CFM will blink 8 times.
NOTE: This feature only verifies that the
CFM is set properly. This feature does
not indicate at what speed the motor is
actually running.
The ECM must be “load tested.” In other
words, the fan must be connected to
properly test the ECM.
Figure 19 – Single-Duct Units (Electronic or DDC/UCM)
SINGLE DUCT UNITS - ELECTRONIC OR DDC/UCM HEATER TERMINALS - TYPICAL OF SINGLE PHASE VOLTAGES
Line Voltage
(See Nameplate)
L1 L2 N - 480
L1 L2 - 208, 240
L1 N - 277, 347
L1
N
SINGLE
PHASE
LINE
VOLTAGES
208
240
277
347
480
Magnetic Contactors (MAGN)
Mercury Contactors (MERC)
STAGES
HEATER
CONTACTORS
1
2
3
SINGLE DUCT UNITS - ELECTRONIC OR DDC/UCM HEATER TERMINALS - TYPICAL OF THREE PHASE VOLTAGES
Contactor
1st Stage
THREE
PHASE
LINE
VOLTAGES
208
480
575
CONTACTORS
Magnetic Contactors (MAGN)
Mercury Contactors (MERC)
HEATER
STAGES
1
2
3
Contactor
2nd Stage
Contactor
1st Stage
Contactor
2nd Stage
Contactor
3rd Stage
Air Flow
Switch
Manual Reset
Cutout
Auto Reset
Thermal Cutout
RED
24V Input from
Controller
Manual Reset
Cutout
Optional
Fuse
YEL
BRN
ORG
PUR
24V Output to
Controller
Line Voltage
(See Nameplate)
Optional
Fuse
(208, 240, and 480)
Optional
Transformer
BLU
L1 L2 L3 - 208,480,600
TB4
TB4
Optional
Fuse
N
L1
Optional
Door
Disconnect
Switch
L1 L2 L3
L2L1 L3
G
L1
N
G
G
Notes:
FACTORY INSTALLED
1.
FIELD INSTALLED
OPTIONAL
2. Actual heater wiring diagrams are supplied
with each unit (3-stage shown).
3. Load carrying P.E. Switches or Contactors
are supplied depending upon amp drawn.
4. Air Flow Switch, Auto Reset Thermal Cutout
and Manual Reset Cutout are provided as standard.
5. Heater Line Fuses, Transformers, and Door
Interlocking Disconnect are optional.
6. If transformer is not ordered, a separate 24-volt
power supply is required for operation of unit controls.
Contactor
3rd Stage
Auto Reset
Thermal Cutout
Air Flow
Switch
24V Input from
RED
Controller
PUR
BRN
ORG
24V Output to
BLU
YEL
Controller
Optional
Transformer
L1 L2 L3
Optional
Door
Disconnect
Switch
G
VAV-SVN01E-EN 47
Wiring
Diagrams
Figure 20 – Single-Duct Units (Pneumatic Controls)
SINGLE DUCT UNITS - PNEUMATIC CONTROL HEATER TERMINAL - TYPICAL OF SINGLE PHASE VOLTAGES
SINGLE
PHASE
LINE
VOLTAGES
208
240
277
347
480
CONTACTORS
P.E. with Magnetic Contactors (PEMA)
P.E. with Mercury Contactors (PEME)
HEATER
STAGES
1
2
3
Contactors
PE Switch
1st Stage
P.E. Switch
2nd Stage
P.E. Switch
3rd Stage
Manual Reset
Cutout
Auto Reset
Thermal Cutout
Air Flow
Switch
Line Voltage
(See Nameplate)
Optional
Fuse
TB4
N
L1
Optional
Disconnect
Switch
L1 L2 - 208, 240
L1 L2 N - 480
L1 N - 277, 347
N
L1
N
L1
G
Door
G
SINGLE DUCT UNITS - PNEUMATIC CONTROL HEATER TERMINAL - TYPICAL OF THREE PHASE VOLTAGES
THREE
PHASE
LINE
VOLTAGES
208
480
575
CONTACTORS
P.E. with Magnetic Contactors (PEMA)
P.E. with Mercury Contactors (PEME)
HEATER
STAGES
1
2
3
NOTE:
1.
FACTORY INSTALLED
FIELD INSTALLED
OPTIONAL
2.
Actual heater wiring diagram is supplied
with each unit (3-stage shown).
3.
Load carrying P.E. Switches or Contactors
are supplied depending upon amp drawn.
4.
Air Flow Switch, Auto Reset Thermal Cutout
and Manual Reset Cutout provided as standard.
Heater Line Fuses and Door Interlocking
5.
Disconnect are optional.
48
Contactors
PE Switch
1st Stage
P.E. Switch
2nd Stage
P.E. Switch
3rd Stage
Manual Reset
Cutout
Auto Reset
Thermal Cutout
Air Flow
Switch
Line Voltage
(See Nameplate)
Optional
Fuse
L1 L2 L3 - 208, 600
L1 L2 L3 N - 480
L1 L2 L3
L2L1 L3
Optional
Door
Disconnect
Switch
L3L2L1
G
TB4
N
G
N
VAV-SVN01E-EN
Wiring
Diagrams
Figure 21 – Fan-Powered Units (Electronic or DDC/UCM)
FAN-POWERED UNITS - ELECTRONIC OR DDC/UCM HEATER TERMINALS - TYPICAL OF SINGLE PHASE VOLTAGES
SINGLE
PHASE
LINE
VOLTAGES
208
240
277
347
480
Magnetic Contactors (MAGN)
Mercury Contactors (MERC)
STAGES
HEATER
CONTACTORS
1
2
Contactor
1st Stage
Contactor
2nd Stage
Optional
Air Flow
Switch
Manual Reset
Cutout
Auto Reset
Thermal Cutout
Line Voltage
(See Nameplate)
Optional
Fuse
L1 L2 N - 208, 240, 480
L1 N - 277, 347
L1 L2 N
TB4
L2L1
N
L2
N
L1
G
G
FAN-POWERED UNITS - ELECTRONIC OR DDC/UCM HEATER TERMINALS - TYPICAL OF THREE PHASE VOLTAGES
Contactor
THREE
PHASE
LINE
VOLTAGES
208
480
575
CONTACTORS
Magnetic Contactors (MAGN)
Mercury Contactors (MERC)
HEATER
STAGES
1
2
Notes:
FACTORY INSTALLED
1.
FIELD INSTALLED
OPTIONAL
2. Actual heater wiring diagrams are supplied
with each unit (2-stage shown).
3. Load carrying P.E. Switches or Contactors
are supplied depending upon amp drawn.
4. Auto Reset Thermal Cutout and Manual Reset
Cutout are provided as standard.
5. Heater Line Fuses, Airflow Switch, and Door
Interlocking Disconnect are optional.
1st Stage
Contactor
2nd Stage
Auto Reset
Thermal Cutout
24V Input from
Controller
Manual Reset
Cutout
Optional
Air Flow
Switch
24V Input from
Controller
BRN
PUR
OR
Line Voltage
(See Nameplate)
OR
PUR
BRN
WHT
BLK
115 or 277V
Output to Motor
Optional
Fuse
WH
BK
115 or 277V
Output to Motor
Optional
Door
Disconnect
Switch
L1 L2 L3 N - 208,480,600
L1 L2 L3
N
TB4
L2L1 L3
N
L1 L2 L3
N
G
Optional
Door
Disconnect
Switch
G
VAV-SVN01E-EN 49
Wiring
Diagrams
Figure 22 – Fan-Powered Units (Pneumatic Controls)
FAN-POWERED UNITS - PNEUMATIC CONTROL HEATER TERMINAL - TYPICAL OF SINGLE PHASE VOLTAGES
SINGLE
PHASE
LINE
VOLTAGES
208
240
277
347
480
STAGES
1
2
3
PE Switch
1st Stage
Manual Reset
Cutout
Contactors
Line Voltage
(See Nameplate)
Optional
Fuse
L1 L2 N - 208, 240, 480
L1 N - 277, 347
L2
N
L1
TB4
G
NL2
L1
HEATER
CONTACTORS
P.E. with Magnetic Contactors (PEMA)
P.E. with Mercury Contactors (PEME)
Auto Reset
Thermal Cutout
FAN-POWERED UNITS - PNEUMATIC CONTROL HEATER TERMINAL - TYPICAL OF THREE PHASE VOLTAGES
THREE
PHASE
LINE
VOLTAGES
208
480
575
STAGES
1
2
3
PE Switch
1st Stage
Optional
Air Flow
Switch
Contactors
Manual Reset
Cutout
BLK
WHT
115 to 277V
Output to Motor
Line Voltage
(See Nameplate)
Optional
L1 L2
Optional
Door
Disconnect
Switch
L1 L2 L3 N - 208, 480, 575
Fuse
L1 L2 L3
N
G
L3L2L1
N
G
N
TB4
HEATER
CONTACTORS
P.E. with Magnetic Contactors (PEMA)
P.E. with Mercury Contactors (PEME)
NOTE:
1.
FACTORY INSTALLED
FIELD INSTALLED
OPTIONAL
2.
Actual heater wiring diagram is supplied
with each unit (1 and 2-stage shown).
3.
Load carrying P.E. Switches or Contactors
are supplied depending upon amp drawn.
4.
Auto Reset Thermal Cutout and Manual Reset
Cutout provided as standard.
Heater Line Fuses, Door Interlocking
5.
Disconnect, and Airflow Switch are optional.
50
P.E. Switch
2nd Stage
Optional
Air Flow
Switch
Auto Reset
Thermal Cutout
BLK
WHT
115 to 277V
Output to Motor
L2L1 L3
Optional
Door
Disconnect
Switch
N
G
N
VAV-SVN01E-EN
Wiring
WARNING
CAUTION
Diagrams
Figure 23 – Fan-Powered Control Boxes
Fan-powered Control Box
with Electronic or DDC Controls
OR FROM HEATER TERMINAL
GREEN
GROUND
SCREW
DISCONNECT
SWITCH
2
4
1
3
24V
R
TO VAV
CONTROLLER
}
BL
BR
R
Y
TRANSFORMER
24V
BK
BK
MOTOR
RELAY
BR
TERMINAL
BLOCK
LINE VOLTAGE
L1
BK
BK
}
N
W
W
BK
MOTOR
SPEED
CONTROL
2.
BK
FUSE
W
W
Fan-powered Control Box
with Pneumatic Controls
Duct Pressure Switch Option
5.
TRANSFORMER
6.
NO
C
NC
DUCT PRESSURE
SWITCH
4.
24V
BK
BK
MOTOR
RELAY
BR
TERMINAL
BLOCK
2
1
LINE VOLTAGE
OR FROM HEATER TERMINAL
GREEN
GROUND
SCREW
DISCONNECT
SWITCH
4
3
24V
R
}
N
L1
BK
5.
W
2.
BK
W
BK
BK
FUSE
4.
W
W
MOTOR
SPEED
CONTROL
BK
W-COM
W
BK
BR
BR
CAPACITOR
3.
MOTOR
FAN
WARNING
HAZARDOUS VOLTAGE!
DISCONNECT, LOCK OUT AND TAG
ALL ELECTRIC POWER INCLUDING
REMOTE DISCONNECTS BEFORE
SERVICING.
DISCHARGE MOTOR START/RUN
CAPACITORS BEFORE SERVICING.
FAILURE TO DISCONNECT POWER
BEFORE SERVICING CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
USE COPPER CONDUCTORS ONLY!
UNIT TERMINALS ARE NOT DESIGNED
TO ACCEPT OTHER TYPES OF
CONDUCTORS.
FAILURE TO DO SO MAY CAUSE
DAMAGE TO THE EQUIPMENT.
NOTES:
1.
2.
3.
4.
5.
6.
CAUTION
FACTORY INSTALLED
BY OTHERS
OPTIONAL OR ALTERNATE CIRCUITRY
DISCONNECT SWITCH, FUSE, & SCR ARE LOCATED
EXTERNAL TO CONTROL BOX.
CAPACITOR IS INSTALLED ON FAN HOUSING.
FUSE IS OPTIONAL.
DETERMINED BY MOTOR VOLTAGE ON ORDER.
VOLTAGE FOUND ON UNIT NAMEPLATE.
FOR SERIES FAN POWERED TERMINAL UNITS ONLY.
BK
W-COM
FAN CONTROL BOXFAN CONTROL BOX
CAPACITOR
Fan-powered Control Box
with Pneumatic Controls
DUCT PRESSURE MAIN CONTROL
6.
BK
NC
P.E. SWITCH-2
NO
CC
CAPACITOR
NO
BK
NC
P.E. SWITCH-1
BK
W
BK
BR
BR
3.
BR
3.
MOTOR
FAN
LINE VOLTAGE
OR FROM HEATER TERMINAL
GREEN
GROUND
SCREW
DISCONNECT
NO
6.
TERMINAL
BLOCK
BK
W-COM
W
BK
BR
MOTOR
FAN
NC
P.E. SWITCH
BK
C
SWITCH
FAN CONTROL BOX
L1
BK
BK
}
N
W
W
BK
MOTOR
SPEED
CONTROL
2.
BK
FUSE
W
W
5.
4.
VAV-SVN01E-EN 51
Wiring
CAUTION
WARNING
Diagrams
Figure 24 – Fan-Powered Units with ECM
Fan-powered Control Box w/ ECM with Electronic or DDC Controls
(Depending on the size of the unit, the ECM board may or may not be located
in the fan control box.)
LINE VOLTAGE
OR FROM HEATER TERMINAL
4.
L1
N
GREEN
GROUND
SCREW
W
BK
3.
FUSE
BK
}
DISCONNECT
SWITCH
2.
CORRECTION CHOKE
GR
TERMINAL
BLOCK
W
POWER FACTOR
W
3.
TRANSFORMER
FAN CONTROL BOX
BK
FAN
MOTOR
2
4
1
3
24V
MOTOR
RELAY
Y
BL
24V
BK
Y
BOARD
}
REDRED
ECM
TO VAV
CONTROLLER
Fan-powered Control Box w/ ECM with Pneumatic Controls
Duct Pressure Switch Option
LINE VOLTAGE
OR FROM HEATER TERMINAL
4.
24VNEUT.
G
R
W
BK
5.
NO
C
DUCT
PRESSURE
SWITCH
BL
NC
BL
FUSE
}
GR
GREEN
W
GROUND
BK
SCREW
2.
DISCONNECT
3.
SWITCH
BK
POWER
FACTO R
CORRECTION
CHOKE
BK
TRANSFORMER
FAN
MOTOR
BK
TERMINAL
BLOCK
W
Y
BL
24V
Y
NEUT.
RED
ECM
BOARD
BL
24V
RED
W
FAN CONTROL BOX
G
R
BK
WARNING
HAZARDOUS VOLTAGE!
DISCONNECT, LOCK OUT AND TAG
ALL ELECTRIC POWER INCLUDING
REMOTE DISCONNECTS BEFORE
SERVICING.
DISCHARGE MOTOR START/RUN
CAPACITORS BEFORE SERVICING.
FAILURE TO DISCONNECT POWER
BEFORE SERVICING CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
CAUTION
USE COPPER CONDUCTORS ONLY!
UNIT TERMINALS ARE NOT DESIGNED
TO ACCEPT OTHER TYPES OF
CONDUCTORS.
FAILURE TO DO SO MAY CAUSE
DAMAGE TO THE EQUIPMENT.
DUCT PRESSURE MAIN CONTROL
5.
NO
BK
NC
P.E. SWITCH-1
NOTES:
1.
2.
DISCONNECT SWITCH, FUSE, & SCR ARE LOCATED
EXTERNAL TO CONTROL BOX.
3.
FUSE IS OPTIONAL.
4.
DETERMINED BY MOTOR VOLTAGE ON ORDER.
VOLTAGE FOUND ON UNIT NAMEPLATE.
5.
FOR SERIES FAN POWERED TERMINAL UNITS ONLY.
FACTORY INSTALLED
BY OTHERS
OPTIONAL OR ALTERNATE CIRCUITRY
BK
BK
NC
P.E. SWITCH-2
Fan-powered Control Box with Pneumatic Controls
LINE VOLTAGE
4.
OR FROM HEATER TERMINAL
FAN
MOTOR
}
GR
GREEN
W
BK
GROUND
SCREW
TERMINAL
2.
W
NC
BLOCK
POWER FACTOR
CORRECTION CHOKE
BK
TRANSFORMER
DISCONNECT
SWITCH
3.
FUSE
NO
CC
NO
C
P.E. SWITCH
BK
BK
24V
BL
Y
NEUT.
Y
BL
24V
RED
RED
ECM
BOARD
FAN CONTROL BOX
G
R
W
BK
52
VAV-SVN01E-EN
Wiring
CAUTION
WARNING
Diagrams
Figure 25 – Fan-Powered Low-Height Units
Fan-Powered Low-Height Control Box with Electronic or DDC Controls
LINE VOLTAGE
OR FROM HEATER TERMINAL
FUSE
}
L1
N
DISCONNECT
BK
W
4.
BK
W
BK
2
4
24V
1
3
5.
SWITCH
MOTOR
RELAY
GREEN
GROUND
SCREW
2.
BK
BR
R
CAPACITOR
BR
MOTOR
SPEED
CONTROL
TERMINAL
BLOCK
3.
2.
BR
BR
W or BR
FAN
MOTOR
W
W
W
W
BK
TRANSFORMER
CAPACITOR
BR
BK
W
Y
24V
FAN CONTROL BOX
3.
BL
BR
BR
R
MOTOR 2
(SIZE 10 ONLY)
W
FAN
}
BK
TO VAV
CONTROLLER
BL
Fan-Powered Low-Height Control Box with Pneumatic Controls
Duct Pressure Switch Option
6.
C
DUCT
PRESSURE
SWITCH
NO
NC
LINE VOLTAGE
OR FROM HEATER TERMINAL
L1
N
BK
W
W
BK
4.
FUSE
BK
5.
GROUND
DISCONNECT
SWITCH
TRANSFORMER
GREEN
SCREW
BK
BL
24V
CAPACITOR
2.
TERMINAL
Y
MOTOR
SPEED
CONTROL
BLOCK
2
1
24V
MOTOR
RELAY
CAPACITOR
FAN
MOTOR 2
3.
FAN
MOTOR
3.
BR
W
BR
2.
WW
BR
BK
BK
(SIZE 10 ONLY)
BR
BR
W
BK
BK
W
W
4
BL
3
FAN CONTROL BOX
WARNING
HAZARDOUS VOLTAGE!
DISCONNECT, LOCK OUT AND TAG
ALL ELECTRIC POWER INCLUDING
REMOTE DISCONNECTS BEFORE
SERVICING.
DISCHARGE MOTOR START/RUN
CAPACITORS BEFORE SERVICING.
FAILURE TO DISCONNECT POWER
BEFORE SERVICING CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
CAUTION
USE COPPER CONDUCTORS ONLY!
UNIT TERMINALS ARE NOT DESIGNED
TO ACCEPT OTHER TYPES OF
CONDUCTORS.
FAILURE TO DO SO MAY CAUSE
DAMAGE TO THE EQUIPMENT.
DUCT PRESSURE MAIN CONTROL
6.
NO
BK
NC
P.E. SWITCH-1
BK
BK
NC
P.E. SWITCH-2
NOTES:
1.
2.
DISCONNECT SWITCH, FUSE, & SCR ARE LOCATED
EXTERNAL TO CONTROL BOX.
3.
CAPACITOR IS INSTALLED ON FAN HOUSING.
4.
FUSE IS OPTIONAL.
5.
DETERMINED BY MOTOR VOLTAGE ON ORDER.
VOLTAGE FOUND ON UNIT NAMEPLATE.
6.
FOR SERIES FAN POWERED TERMINAL UNITS ONLY.
FACTORY INSTALLED
BY OTHERS
OPTIONAL OR ALTERNATE CIRCUITRY
Fan-Powered Low-Height Control Box with Pneumatic Controls
FAN
MOTOR
BR
MOTOR
SPEED
CONTROL
2.
TERMINAL
BLOCK
CAPACITOR
BR
3.
BR
WW
W
W
W
FAN CONTROL BOX
BK
CAPACITOR
L1
NO
C
P.E. SWITCH
N
NC
}
W
W
5.
GREEN
GROUND
SCREW
DISCONNECT
SWITCH
BK
BK
2.
LINE VOLTAGE
OR FROM HEATER TERMINAL
BK
NO
CC
BK
4.
FUSE
BK
3.
BR
FAN
MOTOR 2
(SIZE 10 ONLY)
W
BK
VAV-SVN01E-EN 53
Wiring
CAUTION
WARNING
Diagrams
Figure 26 – Fan-Powered Low-Height Units with ECM
Fan-Powered Low-Height Control Box w/ ECM with Electronic or DDC Controls
(Depending on the size of the unit, the ECM board may or may not be located
in the fan control box.)
LINE VOLTAGE
OR FROM HEATER TERMINAL
3.
FUSE
4.
}
GR
GREEN
GROUND
SCREW
W
BK
TERMINAL
DISCONNECT
SWITCH
2.
W
BLOCK
FAN
MOTOR
W
BK
BK
TRANSFORMER
W
24V
(SIZE 10 ONLY)
BK
Y
BL
FAN CONTROL BOX
FAN
MOTOR 2
2
1
24V
MOTOR
RELAY
BK
Y
NEUT.
RED
4
ECM
3
BOARD
TO VAV
CONTROLLER
}
Fan-Powered Low-Height Control Box w/ ECM with Pneumatic Controls
Duct Pressure Switch Option
}
W
DISCONNECT
SWITCH
BK
BK
TRANSFORMER
GREEN
GROUND
SCREW
2.
4.
FANFAN
MOTOR
GR
BK
W
TERMINAL
BLOCK
W
Y
BL
24V
Y
NEUT.
RED
ECM
BOARD
(SIZE 10 ONLY)
W
BK
BL
24V
RED
FAN CONTROL BOX
MOTOR 2
G
R
W
BK
LINE VOLTAGE
OR FROM HEATER TERMINAL
24V
RED
G
R
W
BK
BL
C
DUCT
PRESSURE
SWITCH
5.
NO
NC
BK
3.
FUSE
BL
WARNING
HAZARDOUS VOLTAGE!
DISCONNECT, LOCK OUT AND TAG
ALL ELECTRIC POWER INCLUDING
REMOTE DISCONNECTS BEFORE
SERVICING.
DISCHARGE MOTOR START/RUN
CAPACITORS BEFORE SERVICING.
FAILURE TO DISCONNECT POWER
BEFORE SERVICING CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
CAUTION
USE COPPER CONDUCTORS ONLY!
UNIT TERMINALS ARE NOT DESIGNED
TO ACCEPT OTHER TYPES OF
CONDUCTORS.
FAILURE TO DO SO MAY CAUSE
DAMAGE TO THE EQUIPMENT.
DUCT PRESSURE MAIN CONTROL
5.
NO
BK
NC
P.E. SWITCH-1
BK
NOTES:
1.
2.
DISCONNECT SWITCH, FUSE, & SCR ARE LOCATED
EXTERNAL TO CONTROL BOX.
3.
FUSE IS OPTIONAL.
4.
DETERMINED BY MOTOR VOLTAGE ON ORDER.
VOLTAGE FOUND ON UNIT NAMEPLATE.
5.
FOR SERIES FAN POWERED TERMINAL UNITS ONLY.
FACTORY INSTALLED
BY OTHERS
OPTIONAL OR ALTERNATE CIRCUITRY
BK
NC
P.E. SWITCH-2
Fan-Powered Low-Height Control Box w/ ECM with Pneumatic Controls
W
BK
P.E. SWITCH
}
DISCONNECT
SWITCH
NO
C
4.
GREEN
GROUND
SCREW
2.
NC
GR
W
TERMINAL
BLOCK
BK
24V
TRANSFORMER
FAN
MOTOR
BL
Y
NEUT.
RED
ECM
BOARD
W
W
BK
Y
BL
(SIZE 10 ONLY)
BK
BL
24V
RED
FAN
MOTOR 2
W
BK
G
R
FAN CONTROL BOX
LINE VOLTAGE
OR FROM HEATER TERMINAL
NO
CC
FUSE
3.
54
VAV-SVN01E-EN
Maintenance
WARNING
WARNING
Periodic maintenance of the VariTrane
product is minimal, but necessary for
efficient operation. Routine maintenance consists of inspecting/replacing
the air filters of the fan-powered
terminals.
Motors
Both the PSC (permanent split capacitor) and the ECM (Electrically Commutated Motor) require no lubrication
during its normal life of operation.
Fan Wheel:
Periodically, the fan wheel should be
inspected for dirt or debris and cleaned
as necessary.
Filter
The filter on fan-powered terminals will
need to be inspected/replaced routinely
depending on the environmental
conditions of the plenum.
Water Coil
Water coils should be inspected and the
fins should be cleaned periodically.
Water coils have been provided with an
access panel as standard to assist with
inspection and cleaning.
Fan Motor Replacement
WARNING
Hazardous Voltage
w/Capacitors!
Disconnect all electric power, including
remote disconnects and discharge all
motor start/run capacitors before
servicing. Follow proper lockout/tagout
procedures to ensure the power cannot
be inadvertently energized. Verify with
an appropriate voltmeter that all
capacitors have discharged. Failure to
disconnect power and discharge
capacitors before servicing could result
in death or serious injury.
Figure 27 – Standard Motor Removal
Standard height fan-powered series
and parallel fan motors are replaceable
through the filter opening and the
standard sliding side access panel. To
access the fan motor, the fan housing
must be detached by removing the
mounting bolts that hold the housing to
the fan board. Removing the entire
housing allows the fan motor, fan
housing, and fan wheel to be re-aligned
on a workbench or floor and prevent
any possible fan wheel rubbing that
may occur. Removing the housing will
provide access to the motor shaft set
screw that holds the fan wheel to the
motor shaft.
The low-height fan assembly was
designed with an inlet ring that assists
with removal of the fan motor. To
access the fan motor assembly, the
bottom panel must be removed. The
inlet ring is held in place by six bolts
and three motor mount bolts. Remove
these bolts and the motor and fan
wheel will come out of the fan housing.
Figure 28– Low-Height Motor Removal
Rotating Components!
Disconnect all electric power, including
remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the power cannot be
inadvertently energized. Failure to
disconnect power before servicing
could result in death or serious injury.
VAV-SVN01E-EN 55
WARNING
Installation
CAUTION
of Diffusers
General
All units must be installed upright and
level as indicated by the arrow on the
side of the units. Return air slots should
be placed perpendicular and offset to
the slot diffusers to avoid shortcircuiting of air distribution patterns.
Place the unit in its approximate final
position and check that it is upright and
level. For single- slot units, engage
the back of the diffuser over the t-bar
with an edge and both ends resting on
the t-bar. For double-slot units, slide
the unit over the t-bar. For center-notch units, place diffuser over the
t-bar, straddling it across a t-bar and
resting on the units ends.
If the unit has a fire damper, make sure
that the damper is still fully open.
Diffuser discharge must always be
flush with the ceiling tiles to assure the
proper airflow (Coanda effect).
Diffusers require specific installation
information when mounting to a
desired ceiling type. Select the ceiling
type that closely matches the job site
application and use the following
procedures.
T-Bar Ceiling
Finish installation of the diffuser in t-bar
ceiling. (See Figure 29.) Follow these
procedures before the ceiling construction is completed.
1. Position the diffuser at each end resting
directly on the structural t-bar for
support and the t-bar fitting into the
channel provided at the unit discharge
air throw.
2.A ceiling tile support flange is provided
on each side of the discharge slot of the
unit. Trim ceiling tile approximately 1½
inches each to allow for width of
discharge slot. For revealed edge
ceilings, tile must be cut in a “Z”
pattern.
3.Install ceiling tiles in usual manner with
cut edges resting on the flanges of the
air slot.
Figure 29 – Diffuser Installation in T-Bar
Ceiling
Concealed Spline Ceiling
Follow these procedures to finish
installation of control and satellite
diffusers and concealed spline for
suspension ceilings before completing
the ceiling construction (Figure 30).
Place the units in their approximate
final positions. If using the trim angle
diffuser, its slots must be even with the
spline level. If applying the trim
accessory, the bottom of the diffuser
must be level with the finished ceiling.
If installing the trim accessory, insert
the trim into the ceiling opening from
below and engage the diffuser slot to
the trim t-bar structure. With bottom
flange of trim accessory against the
ceiling, and using the pre-drilled holes
in the flange as a guide, drill holes in the
flange of the diffuser. Join the diffuser
and trim accessory with self-taping
sheet metal.
Figure 30 – Diffuser with Trim
Accessory Installation in Concealed
Spline Ceiling
Drywall/Plaster Ceiling
Finish installation of diffusers in plaster
ceiling. Follow these procedures before
completing the ceiling construction
(Figure 31).
1. Suspend the units above the intended
ceiling level and their approximate
horizontal positions and finish running
flexible ductwork.
2.After drywall and/or plaster is installed,
cut openings to receive the diffuser air
outlets. Also, allow for access openings
to complete installation and service of
the unit.
3.Slide the trim accessory up and into the
ceiling opening. Using the rim
accessory as a template, drill four guide
holes in the lip of the diffuser slot.
Lower the unit onto the trim frame and
attach with the sheet metal screws.
Note: The bottom of the throat section
must be parallel to the ceilings for proper
air distribution.
CAUTION
Equipment Damage!
Do not install trim frame into ceiling
using screws. When diffuser is placed
on the trim frames, it will pull out.
Figure 31 – Diffuser with Trim
Accessory Installation in Plaster Ceiling
Plaster trim frame attaches with 2–4
tension clips on the side of the diffuser.
56
VAV-SVN01E-EN
Maintenance/
Service Log
DateTagSerial #Service Notes
VAV-SVN01E-EN 57
Maintenance/
Service Log
DateTagSerial #Service Notes
58
VAV-SVN01E-EN
Notes
VAV-SVN01E-EN 59
Trane
An American Standard Company
www.trane.com
For more information contact
your local district office or
e-mail us at comfort@trane.com
Literature Order Number VAV-SVN01E-EN
File Number SL-TD-000-VAV-SVN01E-EN-0606
Supersedes SL-TD-000-VAV-SVN01D-EN-0905
Stocking LocationInland
Trane has a policy of continuous product and product data improvement and reserves the right to change
design and specifications without notice. Only qualified technicians should perform the installation and
servicing of equipment referred to in this publication.
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