Trane LO Guide

Installation
Operation
Maintenance
UniTrane®Fan-Coil Room Conditioners
Force Flo™ Cabinet Heaters
Sizes 02-12
Low Vertical Fan-Coils
Sizes 03-06
UNT-IOM-6
Supercedes UNT-IOM-5
April 2000
Models
“LO” Design Sequence and Later

2UNT-IOM-6
Table of Contents
General Information3
Cabinet Styles4
Model Number Description6
Receivin and Handlin 9
Jobsite Stora e10
Installation Considerations11
Service Access12
Installation Checklist13
Vertical Units15
Installin the Unit15
Horizontal Units16
External Insulatin Require-
ments20
Startup Checklist20
Units with Hydronic Coil Connec-
tions Only21
Pipin 21
Units with Steam Coils22
Factory Pipin Packa e Connec-
tions24
Installin the Auxiliary Drain
Pan25
Condensate Overflow Detection
Device26
Automatic Chan eover Sensor26
Automatic Electric Heat Lockout
Switch (Fan-coil) 27
Ductwork Recommendations32
Duct Connections32
Supply Power Wirin 33
Electrical Connections33
Wall Mounted Control Interconnec-
tion Wirin 35
Electrical Groundin Restric-
tions35
Fan Mode Switch 36
Installation36
Installin Wall Mounted Con-
trols36
Zone Sensor Installation37
Fan Mode Switch39
Tracer® ZN.010 and ZN.51040
Thermostat Module Operatin
Information41
Binary Inputs42
Binary Outputs43
Analo Inputs44
Fan Mode Switch44
Zone Sensors44
Supply Fan Operation45
LED Activity46
Troubleshootin 46
Yellow COMM LED47
Manual Output Test48
Dia nostics50
Resettin Dia nostics51
Troubleshootin 53
Tracer® ZN.52059
Troubleshootin 83
Troubleshootin 85
Tracer® Communication Wirin
88
Service Communication Wirin
89
Wall-Mounted Zone Sensor
Module89
TUC Human Interface90
Coolin and Heatin Operation92
TUC Sequence of Operation92
Fan Mode Operation93
Enterin Water Temperature
Samplin Function94
2-Pipe with Auxiliary Electric Heat
(Fan-coils)94
Fresh Air Damper Options95
BIP4: Low Temperature Detection
Option97
BIP3: Condensate Overflow
Detection Device97
BIP4: Smoke Input98
BIP1: External Interlock98
BIP3: Occupied/Unoccupied
Mode98
BIP2: Motion Detection99
Autocycle Test99
Readin Dia nostics 101
Readin the Operatin Machine
State 102
Readin the Operatin Control
Mode104
Resettin Dia nostics107
Dia nostics107
Unit Mode Listed as Standby108
Troubleshootin 109
Maintenance Procedures116
Periodic Maintenance Check-
list116
Maintenance116
Inspectin and Cleanin Drain
Pans118
Winterizin the Coil 120
Inspectin and Cleanin Coils121
Inspectin and Cleanin the
Internal Insulation on Fan-
Coils123
Inspectin and Cleanin the
Fan124
Fan Board Assembly Removal126
Factory Pipin Packa es128
Appendix128
Typical Wirin Dia rams129-134

UNT-IOM-6 3
UniTrane® fan-coil and Force Flo cabinet heaters units are single
room units with load capabilities of 200 to 1200 cfm. See Figure 1
for unit components. Fan-coil units are available as 2-pipe with or
without electric heat one hydronic circuit) or 4-pipe two hydronic
circuits). Force Flo units feature 2-pipe hydronic coils, electric heat
only, or steam only. Also, units feature a variety of factory piping
packages. See the Appendix on page 100 for more information on
available factory-installed piping packages.
Three control options are available with the UniTrane® fan-coil and
Force Flo cabinet heater units.
1. fan mode switch
2. Tracer® ZN.010 and ZN.510, ZN.520
3. terminal unit controller TUC)
All control options are available as unit or wall mounted. Units with a
Tracer® ZN.010, ZN.510, ZN.520 or TUC also feature a split combina-
tion: unit mounted fan mode switch with a wall mounted setpoint dial.
The Tracer® controllers ZN.010, ZN.510 and ZN.520) utilize binary
outputs to operate 2-position control valves, supply fan/s, 2-position
dampers, and electric heat.
The TUC utilizes binary outputs to control the fan and optional
auxiliary heat. In addition, it operates 2-position or 3 wire floating
point control valves and the fresh air damper.
Available supply and return openings vary with each cabinet style. In
addition, a fresh air opening with either a manual or motorized air
damper is an available option. See pages 4-5 for available cabinet
styles.
General Information
Hydronic coil
Fan motor(s)
Throwaway filter
Supply fan(s)
Piping package
Control panel
Figure 1. Main components of a fan-coil or cabinet heater unit.
*Auxiliary
drain pan
*Main drain pan
*Featured on fan-coils only

4UNT-IOM-6
Model F
Wall Hung Cabinet**
Model B
Vertical Cabinet
Model A
Vertical Concealed
Cabinet Styles
Model C
Horizontal Concealed Model D
Horizontal Cabinet
Model E
Horizontal Recessed

UNT-IOM-6 5
Model K
Low Vertical Concealed*
Model L
Low Vertical Cabinet*
Model M
Inverted Vertical Cabinet**
Model N
Inverted Vertical Recessed**
*Fan-coil only
**Force Flo cabinet heater only
Model J
Vertical Slope Top Cabinet
Model H
Vertical Recessed

6UNT-IOM-6
Figure 2. The unit nameplate is
on the fan scroll.
Model Number
Description
Each UniTrane® fan-coil and Force Flo  cabinet heater has a
multiple character model number unique to that particular unit. To
determine a units specific
options, reference the model
number on the unit nameplate
on the fan scroll. The unit
nameplate also identifies the
serial number, sales order
number, and installation and
operating specifications. See
Figure 2 for the nameplate
location.
Reference pages 7-8 for a
detailed explanation of the
model number.
Complete the installation checklist on page 13 to ensure proper and
safe operation.

UNT-IOM-6 7
Model Number Description
J With piping, RH
K With piping, LH
L With piping, RH, ext. end pocket
M With piping, RH, ext. end pocket
Digits 10 & 11 Design Sequence
LO
Digit 12 Inlet
A Front toe space
B Front bar grille
Front stamped louver
D Bottom stamped louver
E Bottom toe space
F Back duct collar
G Open return
H Back stamped louver
Digit 13 Fresh Air Damper
0 None
A Manual, bottom opening
B Manual, back opening
Manual, top opening
D Auto, 2 pos., bottom opening
E Auto, 2 pos., back opening
F Auto, 2 pos. top opening
G Auto, economizer,
bottom opening
H Auto, economizer, back opening
J Auto, economizer, top opening
K No damper, bottom opening
L No damper, back opening
M No damper, top opening
Digit 14 Outlet
A Front duct collar
B Front bar grille
Front stamped louver
D Front quad grille
E Bottom duct collar
F Bottom stamped louver
G Top quad grille
H Top bar grille
J Top duct collar
K Bottom bar grille
Digit 15 Color
0 None
1 Deluxe beige
2 Soft dove
3 ameo white
4 Driftwood grey
5 Stone grey
6 Rose mauve
Digit 1 Tamperproof Locks
& Leveling Feet
0 None
A Keylock panel
B Keylock access door
Keylock panel & access door
D Leveling feet
E Keylock panel with leveling feet
F Keylock access door
w/leveling feet
G Keylock panel & access door
w/leveling feet
Digit 17 Motor
A Free discharge
B High static
Digit 18 Coil
A 2 row cooling/heating
B 3 row cooling/heating
4 row cooling/heating
D 2 row cooling, 1 row heating
E 2 row cooling, 2 row heating
F 3 row cooling, 1 row heating
G 2 row cooling or heating only
H 3 row cooling or heating only
J 4 row cooling or heating only
K 2 row cooling/heating, elec. heat
L 3 row cooling/heating, elec. heat
M 4 row cooling/heating, elec. heat
N Electric heat only, 1 stage
P 2 row cooling/heating,
1 row heating
Q 2 row cooling/heating,
2 row heating
R 3 row cooling/heating,
1 row heating
U Electric heat only, 2 stage
V Electric heat only, low kw, 1 stage
W Steam coil
Digit 19 Coil Fin Series
2 144
Digit 20 Air Vent
A Automatic
M Manual
Digits 21, 22, & 23 Electric Heat kW
[208 V kW derate in brackets]
000 None
010 1.0 [0.75]
015 1.5 [1.1]
020 2.0 [1.5]
025 2.5 [1.9]
030 3.0 [2.2]
040 4.0 [3.0]
045 4.5 [3.3]
050 5.0 [3.7]
060 6.0 [4.4]
070 7.0 [5.3]
075 7.5 [5.7]
080 8.0 [6.0]
100 10.0
105 10.5 [7.9]
110 11.0 [9.0]
120 12.0
135 13.5 [10.2]
150 15.0
180 18.0 [13.5]
200 20.0 [15.0]
*Force Flo cabinet heater only
Digits 1 & 2 Unit Type
F
FF
Digit 3 Model
A Vertical concealed
B Vertical cabinet
Horizontal concealed
D Horizontal cabinet
E Horizontal recessed
F Vertical wall hung*
H Vertical recessed
J Vertical slope top
K Low vertical concealed
L Low vertical cabinet
M Inverted vertical cabinet*
N Inverted vertical recessed*
Digit 4 Development Sequence
B
Digits 57 Unit Size
020 200 cfm
030 300 cfm
040 400 cfm
060 600 cfm
080 800 cfm
100 1000 cfm
120 1200 cfm
Digit 8 Unit Voltage
1 115/60/1
2 208/60/1
3 277/60/1
4 230/60/1
5 208/60/3
6 230/6j0/3
7 480/60/3
8 110-120/50/1
9 220-240/50/1
A 220-240/50/3
B 380-415/50/3
Digit 9 Piping System Placement
A W/o piping, RH conn.,
w/o aux. drain pan
B W/o piping, LH conn.,
w/o aux. drain pan
W/o piping, RH conn.,
w/ aux. drain pan
D W/o piping, LH conn.,
w/ aux. drain pan
E W/o piping, RH conn.,
w/o aux. drain pan,
ext. end pocket
F W/o piping, LH conn.,
w/o aux. drain
G W/o piping, RH conn.,
w/ aux. drain pan,
ext. end pocket
H W/o piping, LH conn.,
w/ aux. drain pan, ext. end
pocket

8UNT-IOM-6
R 7 falseback
T 8 falseback
Digit 40 Main Auto Circuit Setter GPM
0 None
A 0.5
B 0.75
1.0
D 1.5
E 2.0
F 2.5
G 3.0
H 3.5
J 4.0
Digit 41 Auxiliary Auto Circuit Setter GPM
0 None
A 0.5
B 0.75
1.0
D 1.5
E 2.0
F 2.5
G 3.0
H 3.5
J 4.0
Digit 42 Subbase
0 None
A 2 height
B 3 height
4 height
D 5 height
E 6 height
F 7 height
Digit 43 Recessed Flange
0 None
A Recessed flange
Digit 44 Wallbox
0 None
A Anodized
Digit 24 Reheat
0 None
A Steam
B Hot water
Digit 25 Disconnect Switch
0 None
D With disconnect
Digit 2 Filter
0 None
11 TA
2 1 TA pltd. media
3 1 TA + 1 extra
4 1 TA pltd. media + 1 extra
5 1 TA + 2 extra
6 1 TA pltd. media + 2 extra
7 1 TA + 3 extra
8 1 TA pltd. media + 3 extra
Digit 27 Main Control Valve
0 None
A 2 way, 2 pos., N.O. (25 psig)
B 3 way, 2 pos., N.O. (30 psig)
2 way, 2 pos., N. . (25 psig)
D 3 way, 2 pos., N. . (15 psig)
E 2 way, 2 pos., N.O. (50 psig)
F 3 way, 2 pos., N.O. (50 psig)
G 2 way, 2 pos., N. . (50 psig)
H 3 way, 2 pos., N. . (50 psig)
J 2 way, mod., v = 0.7 (50 psig)
K 3 way, mod., v = 0.7 (50 psig)
L 2 way, mod., v = 1.5 (50 psig)
M 3 way, mod., v = 1.5 (50 psig)
N 2 way, mod., v = 2.5 (50 psig)
P 3 way, mod., v = 2.5 (50 psig)
Q 2 way, mod., v = 4.0 (50 psig)
R 3 way, mod., v = 4.0 (50 psig)
Digit 28 Auxiliary Control Valve
0 None
A 2 way, 2 pos., N.O. (25 psig)
B 3 way, 2 pos., N.O. (30 psig)
2 way, 2 pos., N. . (25 psig)
D 3 way, 2 pos., N. . (15 psig)
E 2 way, 2 pos., N.O. (50 psig)
F 3 way, 2 pos., N.O. (50 psig)
G 2 way, 2 pos., N. . (50 psig)
H 3 way, 2 pos., N. . (50 psig)
J 2 way, mod., v = 0.7 (50 psig)
K 3 way, mod., v = 0.7 (50 psig)
L 2 way, mod., v = 1.5 (50 psig)
M 3 way, mod., v = 1.5 (50 psig)
N 2 way, mod., v = 2.5 (50 psig)
P 3 way, mod., v = 2.5 (50 psig)
Q 2 way, mod., v = 4.0 (50 psig)
R 3 way, mod., v = 4.0 (50 psig)
Digit 29 Piping Package
0 None
A Ball valve supply & return
B Ball valve supply & manual circuit
setter return
Ball valve supply & auto circuit
setter
D Ball valve supply & return
w/strainers & unions
E Ball valve supply & manual circuit
setter w/strainers & unions
F Ball valve supply & auto circuit
setter w/strainers & unions
Digit 30 Control Type
A Fan Speed Switch
TU
D TU w/Trane I S
E Tracer® ZN.010
F Tracer® ZN.510
G Tracer® ZN.520
Digit 31 Control Options
D Unit mtd. fan mode switch (OHML)
K Wall mtd. fan mode switch (OHML)
V Unit mtd. zone sensor, w/SP
rotary, & fan mode switch
(OAHML),
W Wall mtd. zone sensor w/
SP rotary, & fan mode switch
(OAHML),
X Unit mtd. fan mode switch, wall
mtd. setpoint dial zone sensor
Digit 32-34 Future Control Options
Digit 35 Control Function 3
0 None
2 ondensate overflow detection
Digit 3 Control Function 4
0 None
2 Low temperature detection
Digits 37 & 38 Future Control Options
Digit 39 Recessed Options
0 None
A Stand. 5/8 recessed panel
B 2 projection panel
2.5 projection panel
D 3 projection panel
E 3.5 projection panel
F 4 projection panel
G 4.5 projection panel
H 5 projection panel
J 5.5 projection panel
K 6 projection panel
L 2 falseback
M 3 falseback
N 4 falseback
P 5 falseback
Q 6 falseback
K 4.5
L 5.0
M 6.0
N 7.0
P 8.0
Q 9.0
R 10.0
T11.0
U 12.0
K 4.5
L 5.0
M 6.0
N 7.0
P 8.0
Q 9.0
R 10.0
T11.0
U 12.0

UNT-IOM-6 9
Receiving and Handling
UniTrane® fan-coil and Force Flo cabinet heaters ship in individual
cartons for maximum protection during shipment and for handling and
storage ease. Each carton has tagging information such as the
model number, sales order number, serial number, unit size, piping
connections, and unit style to help properly locate the unit in the floor
plan. If specified, the unit will ship with tagging designated by the
customer.
Complete the following checklist before accepting delivery of units to
detect any shipping damage.
o 1. Inspect each piece of the shipment before accepting it.
Check for rattles, bent carton corners, or other visible indications of
shipping damage.
o 2. If the carton appears damaged, open it immediately and
inspect the contents before accepting. Do not refuse the shipment.
Make specific notations concerning the damage on the freight bill.
Check the unit casing, fan rotation, coils, condensate pan, filters, and
all options or accessories.
o 3. Inspect the unit for concealed damage and missing compo-
nents soon after delivery and before storing. Report concealed
damage to the delivering carrier within the allotted time after
delivery (check with the carrier on the allotted time to submit a
claim).
o 4. Do not move damaged material from the receiving location if
possible. It is the receivers responsibility to provide reasonable
evidence that concealed damage did not occur after delivery.
o . Do not continue to unpack shipment if it appears damaged.
Retain all internal packing, cartons, and crate. Take photos of the
damaged material if possible.
o 6. Notify the carriers terminal of damage immediately by phone
and mail. Request an immediate joint inspection of the damage by
the carrier and consignee.
o 7. Notify the Trane sales representative of the damage and
arrange for repair. Have the carrier inspect the damage before begin-
ning any repairs to the unit.

10 UNT-IOM-6
This unit is intended for indoor use only. To protect the unit from
damage due to the elements and prevent it from possibly becoming a
contaminant source for IAQ problems, store the unit indoors. If indoor
storage is not possible, the Trane Company makes the following
provisions for outdoor storage:
1. Place the unit s) on a dry surface or raised off the ground to assure
adequate air circulation beneath unit and to assure that no portion of
the unit contacts standing water at any time.
2. Cover the entire unit with a canvas tarp only. Do not use clear,
black or plastic tarps as they may cause excessive moisture conden-
sation and equipment damage.
Note: Wet interior unit insulation can become an amplification site for
microbial growth (mold), which may cause odors and health-related
indoor air quality problems. If there is visable evidence of microbial
growth (mold) on the interior insulation, remove and replace the
insulation prior to operating the system. Refer to the Inspecting and
Cleaning the Internal Insulation section on page 123 for more
information.
Jobsite Storage

UNT-IOM-6 11
Complete the following checklist before installing the unit.
o 1. Clearances
Allow adequate space for free air circulation, service clearances,
piping and electrical connections, and any necessary ductwork. For
specific unit dimensions, refer to the submittals. Allow clearances
according to local and national electric codes. See the following
section on Service Access and refer to Figure 3 on page 12 for
recommended service and operating clearances. Provide removable
panels for concealed units.
o 2. Structural Support
The floor should be strong enough to adequately support floor
mounted units. The installer is responsible to supply adequate
support rods for installation of ceiling units.
o 3. Level
If necessary, prepare the floor or ceiling to ensure the unit installation
is level zero tolerance) in both horizontal axis to allow proper
operation.
Set the unit level using the chassis end panels as a reference point.
Do not use the coil or drain pan as the reference point since the coil
is pitched and the drain pan has an inherent positive slope to provide
proper drainage.
o 4. Condensate Line
A continuous pitch of 1 inch per 10 feet of condensate line run is
necessary for adequate condensate drainage.
o . Wall and Ceiling Openings
Recessed units only:
Refer to the submittal for specific dimensions of wall or ceiling
openings before attempting to install the unit.
Horizontal concealed units only:
The installation of horizontal concealed units must meet the require-
ments of the National Fire Protection Association N.F.P.A.) Stan-
dard 90A or 90B concerning the use of concealed ceiling spaces as
return air plenums.
o 6. Exterior
Touch up painted panels if necessary. If panels need paint, sanding
is not necessary. However, clean the surface of any oil, grease, or
dirt residue so the paint will adhere. Purchase factory approved touch
up epoxy paint from your local Trane Service Parts Center and apply.
Installation
Considerations

12 UNT-IOM-6
Service access is available from the front on vertical units and from
the bottom on horizontal units. Cabinet and recessed units have
removable front or bottom panels to allow access into the unit. See
Figure 3 for recommended service and operating clearances.
Units have either right or left hand piping. Reference piping locations
by facing the front of the unit airflow discharges from the front). The
control panel is always on the end opposite the piping.
The unit has a modular fan board assembly that is easy to remove.
Also, the main drain pan is easily removable for cleaning. See the
Maintenance section beginning on page 88 for more details on
servicing.
Service
Access
12 in.
both sides
8.5 in.
both sides
A- Front Access or Front Free Discharge B- Control Access Door C- Front Free Discharge D- Back Louvered Return
3 in.
36 in.
A
A
C
24 in.
Figure 3. Recommended Service and Operating Clearances
8.5 in.
both sides
28 in.
28 in.
24 in.
6 in.
B
12 in.
both sides
Vertical or Low Vertical
Concealed or Vertical
Recessed
Vertical or Low
Vertical Cabinet
Horizontal
Cabinet
Horizontal Concealed
or Recessed

UNT-IOM-6 13
The following checklist is only an abbreviated guide to the detailed
installation procedures given in this manual. Use this list to ensure all
necessary procedures are complete. For more detailed information,
refer to the appropriate sections in this manual.
WARNING: Allow rotating fan to stop before
servicing equipment. Failure to do so may cause severe
personal injury or death.
o 1. Inspect the unit for shipping damage.
o 2. Level installation location to support the unit weight ad-
equately. Make all necessary wall or ceiling openings to allow
adequate air flow and service clearances.
o 3. Ensure the unit chassis is level.
CAUTION: The unit must be installed level (zero
tolerance) in both horizontal axis for proper operation.
Failure to do so may result in condensate management
problems such as standing water inside the unit. Stand-
ing water and wet surfaces may result in microbial
growth (mold) in the drain pan that may cause unpleasnt
odors and serious health-related indoor air quality prob-
lems.
o 4. Secure the unit and any accessory items properly to the
wall or ceiling support rods.
o . Complete piping connections correctly.
o 6. Check field sweat connections for leaks and tighten the
valve stem packing, if necessary.
o 7. Install the auxiliary drain pan properly under piping package
on fan-coil units.
o 8. Pitch condensate drain line 1 inch drop per 10 feet of line
run on fan-coil units.
Installation Checklist
!
!

14 UNT-IOM-6
o 9. Complete condensate drain line connections on fan-coil
units.
o 10. Install automatic changeover sensor option on the
supply water line.
o 11. Install automatic electric heat lockout switch option on
the supply water line.
o 12. Install condensate overflow switch option correctly on
the auxiliary drain pan.
o 13. Install the low temperature detection device option correctly.
o 14. Complete all necessary duct connections.
o 1 . Complete all interconnection wiring for the wall mounted fan
mode switch or zone sensor per the wiring schematic and guidelines
established in the Wall Mounted Control Interconnection Wiring
section on page 35.
o 16. Install the wall mounted fan mode switch, or zone sensor
module options properly.
o 17. Connect electrical supply power according to the NEC and
unit wiring diagrams.
o 19. Remove any miscellaneous debris, such as sheetrock, that
may have infiltrated the unit during construction.
o 20. Replace the air filter as required.

UNT-IOM-6 15
Size L (in.)
02 21 1/4
03 21 1/4
04 26 1/4
06 35 3/4
08 44 1/4
10 63 1/4
12 63 1/4
Floor Level
15.5 in.
7.5 in.
L
L
12.19 in.
Floor Level
Vertical Units
Figure 4. Keyslot Hanger Hole Locations
Installing the Unit
Before beginning installation, refer to Table 1 on page 17 for unit
weights and Figure 3 on page 12 for service and operating clearances.
In addition, refer to the unit submittal for installation details.
CAUTION: Do not allow electrical wire to fall
between the unit and installation surface. Failure to
comply may cause electrical shorts or difficulty in access-
ing wires.
Install vertical units in an upright position using the 5/8 inch diameter
double key slot hanger holes, located on the back of unit. The hanger
holes allow a maximum shank size of 5/16 inch diameter threaded
rods or lag screws installer provides). Follow the installation proce-
dure below.
1. Prepare wall openings for recessed units. Reference unit submittal
for each unit size dimensions.
2. If the unit has leveling legs, adjust them correctly to level unit.
3. Mark the position of the keyslot hanger holes on the wall according
to the dimensions given in Figure 4 for each unit size. Align the
hole locations evenly.
!
Cabinet & Concealed Units
Size L (in.)
03 26 1/4
04 35 3/4
06 44 1/4
Low Vertical Cabinet & Concealed

16 UNT-IOM-6
4. Insert the threaded rods or lag screws in the wall before setting the
unit in place.
. Remove the front panel cabinet unit only) by lifting it upward.
6. Position the hanger holes, located on the back of the unit, over the
rod or lag screw heads, pushing the unit downward to properly
position.
7. Complete piping and wiring connections, in addition to any neces-
sary ductwork to the unit as instructed in the following sections.
Ensure that the auxiliary drain pan is in position on fan-coil units.
8. Install the front panel before starting the unit.
On cabinet units, replace the front panel by aligning the bottom tabs
on the unit with the respective slots on the panel bottom. Align the
top edge of the unit with the panel.
On recessed units, install the front panel by aligning and locking
together the interlocking support channel of the panel and unit. While
holding the panel against the unit, tighten the screws at the top of the
panel until it fits tight against the units front. Do not over tighten the
screws.
CAUTION: All unit panels and filters must be in
place prior to unit start-up. Failure to have panels and
filters in place may cause motor overload.
Install horizontal units suspended from the ceiling using the four 5/8
inch diameter double key slot hanger holes, located on the top of the
unit. The hanger holes allow a maximum shank size of 5/16 inch
diameter threaded rods or lag screws installer provided). Follow the
installation procedure below.
Note: Follow the requirements of National Fire Protection Association
(NFPA) Standard 90A or 90B, concerning the use of concealed
ceiling spaces as return air plenums.
1. Prepare the ceiling opening for recessed units. Reference the unit
submittals for each unit size dimensions.
!
Horizontal Units

UNT-IOM-6 17
2. Position and install the suspension rods or a suspension device
supplied by installer) according to the unit size dimensions in
Figure 4 on page 15. Also refer to the weight range chart given in
Table 1.
3. On cabinet units, remove the bottom panel by using a 5/32 inch
Allen wrench to unscrew fasteners. Swing the panel down and lift
outward.
4. Level the unit by referencing the chassis end panels. Adjust the
suspension device.
. Complete piping and wiring connections, in addition to any neces
sary ductwork as instructed in the following sections. Ensure that
the auxiliary drain pan is in position on fan-coil units.
6. Install the bottom panel before starting the unit.
7. Ensure condensate drain line is pitched 1 inch per 10 feet of pipe
away from fan-coil unit.
Table 1. Unit Operating Weights, pounds (kg)
Unit Cabinet Concealed Recessed Low Vertical Low Vertical
Size Models Models Models Cabinet Models Concealed
Models
02 84 38) 68 31) 68 31) NA NA
03 84 38) 68 31) 68 31) 112 51) 96 44)
04 112 51) 96 44) 78 35) 139 63) 123 56)
06 139 63) 123 56) 118 54) 148 67) 131 59)
08 148 67) 131 59) 129 59) NA NA
10 200 91) 182 83) 243 110) NA NA
12 200 91) 182 83) 243 110) NA NA
Note: All weights are approximate. Individual weights may vary depending upon the units options.

18 UNT-IOM-6
Cabinet units:
Install the bottom panel by placing the hinged end on the units hinged
end always at the return end of the unit). See Figure 4 on page 15 for
keyslot hanger hole locations. Swing the panel upward into position.
Tighten the panel to the unit with the fasteners provided. Do not over-
tighten the fasteners.
Recessed units:
See Figure 5 on page 19 and follow the procedure below.
· Insert the mounting bolts through the panel brackets of the trim ring
and secure to the hanger holes on the unit. Tighten the mounting
bolts to pull the trim ring snug against the finished ceiling.
· Install the bottom panel by placing the hinged end on the trim ring
hinged end always at the units return end).
· Adjust the inner duct of the expansion collar on units with a bottom
return) to ensure a tight fit against the insulation located on the
perimeter of the bottom panels return louver.
· Safety chain assembly: close s-hook on each end of chain. Insert s-
hooks through holes in unit and door. Close s-hook on door.
· Insert retaining screws through bottom panel door and place
retaining rings on screws.
· Swing the bottom panel upward into position. Hook the safety chain
to the bottom panel and the unit. Tighten the panel to the unit with
the fasteners provided. Do not over tighten the removable front
access panel.
CAUTION: All unit panels and filters must be in
place prior to unit start-up. Failure to have panels and
filters in place may cause motor overload.
Note: The trim ring assembly cannot accomodate unlevel ceilings.
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UNT-IOM-6 19
Figure 5. Trim ring assembly installation.

20 UNT-IOM-6
o 1. Ensure all panels are in place.
o 2. Tighten unions adequately if unit has a factory deluxe piping
package.
o 3. Properly vent the hydronic coil to allow water flow through the
unit.
o 4. Set water flow to the unit properly if unit piping has the circuit
setter valve.
o . Check strainers if supplied) for debris after applying system
water.
o 6. Install the auxiliary drain pan and route the main drain pan
hoses to the auxiliary drain pan on vertical fan-coil units.
o 7. Ensure all grille options are in place.
o 8. Ensure the air filter is in place.
o 9. Set the damper position to allow the fresh air requirement on
units with a fresh air damper.
Note: Some circumstances may require the unit to run before building
construction is complete. These operating conditions may be beyond
the design parameters of the unit and may adversely affect the unit.
Startup Checklist
Insulate all cold surfaces to prevent condensation. Moisture mixed
with accumulated dirt and organic matter may create an amplification
site for microbial growth mold) causing unpleasant odors and health-
related indoor air quality IAQ) problems.
The Trane Company recommends field-insulation of the following
areas to prevent potential condensate and IAQ problems:
1. Supply and return water piping connections
2. Condensate drain lines and connections
3. Fresh air intake duct connections
4. Discharge duct connections
5. Wall boxes
External Insulating
Requirements