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Installation Manual
IOM-MAB-00 08-15-04
MAB Modular Air Handler Belt Drive
Installation, Operation, and Maintenance Manual
Contents Page
Introduction.............................................................1
General ....................................................................1
Safety .......................................................................1
Inspection................................................................1
Product Description ...............................................1
Model Number Specification .............................................1
Dimension Specification .................................................... 2
Blower and Plenum Information ........................................2
Standard Installation ..............................................4
Ductwork ...........................................................................4
Duct Insulation and Vapor Proofing................................... 5
Sound Attenuation............................................................. 5
Condensate Drain .............................................................5
Water Piping...................................................................... 5
Motors and Drives .............................................................6
Electrical Connections.......................................................6
Installation of Options............................................6
Grille Plenum..................................................................... 6
Mixing Box.........................................................................7
Electric Heat......................................................................8
Air Handler Startup.................................................8
Operation and Maintenance ..................................9
Return Air Filters ...............................................................9
Coil ....................................................................................9
Belt and Pulley ..................................................................9
Motor ................................................................................. 9
Blower ...............................................................................9
Abbreviations..........................................................9
The installation is to be performed only
whose experience meets or exceeds the requirements of
the work involved.
The installer MUST read the entire contents of this guide
and develop a thorough understanding before beginning
installation.
Due to a continuing program of product research, Titus
reserves the right to discontinue or change without notice,
any or all specifications or designs without incurring
obligations.
by individuals
Safety
The installation and/or servicing of comfort conditioning
equipment can be hazardous due to system pressures
and electrical devices.
Caution: Onl
should perform service and/or installation.
Observe all precautions and warnings in product
data or attached to the unit.
Follow all safety codes. Wear eye protection and gloves.
Have a fire extinguisher readily available.
Caution: Disconnect all power supplies before
accessing equipment.
Disconnecting more than one power supply may
be required to de-energize some equipment.
ELECTRIC SHOCK CAN CAUSE DEATH.
y trained and qualified personnel
DANGER
Introduction
This document provides installation, operation, and
maintenance information for the Titus Modular Air Handler
Belt Drive (MAB) models.
Additional information may be found at the Titus website,
www.titus-hvac.com.
Inspection
Thoroughly inspect all packages upon receipt. Ensure
carton(s) have not been dropped, crushed or punctured.
Inspect all contents for damage. If damage is found,
immediately file a claim with the delivering carrier.
Product Description
General
The following information is to be used by the installer as a
guide. Since each installation is unique unto itself, only
general topics are covered. Topic order may not be the
same as required by actual installation.
This guide is not intended to supersede or circumvent any
applicable national, state, or local codes.
605 Shiloh Road • Plano, Texas 75074 • 972- 212-4800
All rights reserved. No part of this work may be reproduced or transmitted in any form or any means, electronic or mechanical, including photocopying and recording, or by any information storage retrieval system without permission in writing from Air Distribution Technologies.
This section provides model features, number
nomenclature, various unit dimensions, and coil
specification.
Model Number Specification
The following figure defines model number nomenclature
specifics.
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MAB Installation Manual
Figure 1. Air Handler Model Number
Nomenclature
IOM-MAB-00 08-15-04
Dimension Specification
Figures 2 and 3 show dimensional callouts for all sides of an
MAB unit. Tables 1 and 3 provide MAB model dimensional
specifics such as tonnage, blower, filter dimensions, optional
discharge or return air plenum, and shipping weight of
plenum.
Blower and Plenum Information
Tables 2 and 4 provide the blower coil and/or plenum
specifics for MAB models. Table 5 provides water
connection sizes based on model.
Figure 2. MAB08 & MAB12 Dimensional Views
Table 1. Cabinet Dimensions (MAB08 & MAB12)
Model
MAB08/12 37 31.75 36 27.50 16 12 8.50 1.13 14.25 16 x 32
Model
MAB08 800 2 2/10 4/10 6/10 0.625 13 0.75 145 0.75 156
MAB12 1200 3 2/10 4/10 6/10 0.625 18 0.75 171 0.875 190
Nominal
CFM
A B C D E F G H J
Table 2. Blower Coil Specifics (MAB08 & MAB12)
Nominal
Capacity
(Tons)
Water
Dimensions (inches)
Rows/Fins Per Inch Coil Connection (OD Sweat)
Hot
Chilled
Water
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Two-
Row
Ship.
Wgt.
1-inch Filter
Four-
Row
Ship.
Wgt.
Six-
Row
Ship.
Wgt.
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MAB Installation Manual
IOM-MAB-00 08-15-04
Figure 3. Dimensional View
Table 3. Cabinet Dimensions
Model A B C D E F G H J K
MAB16/20 40 26 27.5 36 25.5 11.88 13.63 1.13 13.13 21.25
MAB30/40 50 34 34.5 48 32 16.38 19 1.13 15.44 27
MAB60/80 72 34 47.5 66 45 16.38 16.38 1.13 14 34
Note: All dimensions in inches.
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MAB Installation Manual
Table 4. Blower Coil and Plenum Dimensions (MAB16 through MAB80)
Model
MAB16 1600 4 10 x 10 (2) 20 x 25 75 23 16 x 24
MAB20 2000 5 10 x 10 (2) 20 x 25 75 23 16 x 24
MAB30 3000 7.5 15 x 15 (4) 16 x 25 90 26-1/2 18 x 48
MAB40 4000 10 15 x 15 (4) 16 x 25 90 26-1/2 18 x 48
MAB60 6000 15
MAB80 8000 20
Nominal
CFM
Model
MAB16 7/8" 321 1-1/8" 377 7/8" 30
MAB20 1-1/8" 344 1-1/8" 400 1-1/8" 34
MAB30 1-1/8" 584 1-3/8" 637 1-1/8" 49
MAB40 1-3/8" 584 1-5/8" 637 1-1/8" 53
MAB60 1-3/8" 844 1-5/8" 930 1-1/8" 86
MAB80 (2) 1-5/8" 890 (2) 1-5/8" 996 (2) 1-1/8" 106
Nominal
Capacity
(Tons)
Table 5. MAB Water Coil Connection Size (OD SWT)
4-Row 6-Row 2-Row
Coil Size
Blower 2” Filter
(2) 16 x 20
(2) 15 x 12
Ship
Weight
(lbs)
(2) 16 x 25
(2) 20 x 20
(2) 20 x 25
Coil Size
Ship
Weight
(lbs)
Optional Discharge Grille Plenum
Weight (lbs)
240 36 (4) 12 x 30
Coil Size
IOM-MAB-00 08-15-04
Height
(inches)
Ship
Weight
(lbs)
Grille Size
(inches)
Standard Installation
Basic installation procedure covers verifying and/or
installing the following items.
• Ductwork
• Duct insulation and vapor proofing
• Unit placement
• Sound attenuation
• Condensate drain
• Water piping
• Motors and drives
• Electrical connections
Note: If mixing boxes form part of the unit, install the
mixing boxes prior to installing unit. See Mixing Box
installation instructions within this document.
Ductwork
Use accepted industry practices and design guidelines of
the ASHRAE Fundamentals Handbook. Ductwork must
comply with all building codes and the National Fire
Protection Association’s pamphlet 90A and 90B
Carefully inspect any previously installed ductwork to
determine suitability.
Note: Ductwork should be
requirements of the installation. Ductwork should
transition gradually from a smaller size blower
outlet to required duct run size to avoid excessive
loss of air velocity.
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of a size meeting
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MAB Installation Manual
DANGER
BEFORE INSTALLING UNIT, DETERMINE IF THE UNIT
WEIGHT CAN BE SAFELY SUPPORTED.
POSSIBLE INJURY AND DAMAGE MAY RESULT DUE
TO JOIST/TRUSS OVERLOADING.
1. When return air duct connection is smaller than return
air inlet opening, construct the transition piece so the
horizontal and vertical dimensions of transition does
not increase more than one inch for every seven feet
of length.
2. Allow a minimum of three feet of straight ductwork
following an equipment outlet.
3. Install unit with 1/8-inch pitch toward condensate
drain opening.
Duct Insulation and Vapor Proofing
Previously installed heating supply ductwork may already
have adequate insulation against excessive heat loss.
This insulation may be satisfactory for protection against
heat gain from summer cooling. Depending upon
application, additional
Externally insulated ductwork must have adequate vapor
seal for summer operation, especially where duct is
exposed to high humidity conditions.
insulation may be required.
IOM-MAB-00 08-15-04
Water Piping
All piping must be supported, independent of coils. Swing
joints or flexible fittings must be provided to absorb
expansion and contraction strains. Rigid piping reduces
the effectiveness of vibration isolators. The water supply
should always be connected so the entering water is on
the leaving airside of the coil. See Figure 6. Coils must be
adequately vented in order to prevent air binding.
Note: Freeze-ups due to low air temperatures are not
covered under the warranty agreement.
Figure 4. Condensate Drain
Sound Attenuation
Flexible duct connections should be used between the unit
and both the supply and return ducts.
Both suspended and base-mounted units require unit
vibration isolation.
Condensate Drain
Condensate drain must consist of a minimum of ¾-inch
copper tubing, ¾-inch galvanized pipe, or ¾-inch PVC
pipe. Figure 4 shows condensate drain setup. The drain
trap must be properly configured to ensure the removal of
all condensate runoff. Ensure drain pitches down
slope of one inch every 10 feet.
Note 1: Incorrect trapping can hold water in pan,
causing overflow.
Note 2: Consult local codes for additional precautions
before installing condensate pan.
Caution: If unit location is above an occupied
space or where damage may result from
condensate overflow, install a watertight pan
of corrosion-resistant metal beneath unit to
catch overflow. If this condition exists a
separate ¾-inch condensate drain must be
provided for this added pan. See Figure 5.
ward at a
Figure 5. Occupied Space Condensate Pan
Installation
Figure 6. Blower Coil Connections
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MAB Installation Manual
IOM-MAB-00 08-15-04
Motors and Drives
Units are normally shipped with motor and drive installed.
However; when mounting a motor on the adjustable base
in the field, use extreme care to ensure proper alignment
and belt tension.
Electrical Connections
Each unit has a mounted control box, and typically, the
motor is to be wired to this box. Only ODP, single- and
three-phase motors on 800 to 2000 CFM units are factorywired to junction box. All other motors require field wiring
to junction box located on side of the unit cabinet.
Note 1: Unit must be permanently grounded in
accordance with NEC and local codes and
ordinances. See the typical wiring diagrams shown in
Figure 7.
Note 2: Not all installations require a starter (some
motors utilize a contactor).
Installation of Options
In addition to the standard equipment, the following
optional equipment may require consideration during
installation.
• Discharge grille plenum.
• Mixing box.
• Electric heat.
• Motor and drive selections.
Grille Plenum
The discharge grille plenum is designed for a freestanding
configuration set in an open area with a requirement for a
90° turn of the discharge air. See Figure 8. This option is
available on models MAB16 through 80.
1. Check plenum alignment with unit. Remove screws
aligning with the smaller plenum cutouts. Retain
screws for later.
Note: Screws aligning with the larger cutouts
remain in place.
2. Remove grille from the plen
3. Position plenum so discharge is directed toward
the back or front of unit, as desired.
4. Align the ½-inch holes in the plenum with the unit’s
protruding screw heads.
5. Align the smaller ¼-inch holes in plenum and unit
together.
6. Square up plenum and unit; then reach through
grille opening to insert screws into the smaller ¼inch holes.
7. Tighten all screws to secure plenum.
8. Reinsert grille in plenum opening and secure with
screws retained previously. Adjust grille louvers
manually.
um.
Figure 7. Wiring Diagrams
Figure 8. Grille Plenum Installation
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MAB Installation Manual
IOM-MAB-00 08-15-04
Mixing Box
Preparation
Inspect desired installation location and determine if
space provides sufficient work and safety clearances. If
space allows, make all sheet metal connections and
attachments prior to moving complete assembly to duct
connection site. Figure 9 and Table 6 provide unit, mixing
boxes, and damper dimensional information.
One side of mixing box has two plastic plugs. These
1.
plugs may be removed and placed on the opposite
end to seal the unused 7/8-inch holes at the opposite
cabinet end where the 5/6-inch linkage rods do not
extend outward.
Choose the cabinet side most accessible for
2.
servicing to mount damper motor. Remove
each damper shaft and extend shaft until second
hole in shaft aligns with hole in damper blade. Insert
bolt. Connect two shafts with the two crank arms and
the 5/16-inch linkage rod (furnished with mixing box).
Mount damper motor on the selected side of mixing
3.
box cabinet by drilling necessary holes and securing
with screws or nuts and bolts.
bolt for
Installation
Attach mixing box to unit return-air duct flange.
1.
Vertical duct flange connections at unit rear are prepunched to match pre-punched holes in mixing
boxes. Mixing boxes may be mounted for top-rear or
bottom-rear connections.
2.
After bolting vertical flange, drill holes in horizontal
duct flanges. Secure flanges with screws or nuts and
bolts.
Use field-supplied hardware to connect motor shaft
3.
to one of the damper shafts.
Connect duct to the 1-inch
4.
mixing box for return and fresh air locations as
needed.
Note: Installation steps 1, 2, and 3 may follow
Preparation steps 1 and 2, if preferred.
duct flange provided on
Figure 9. Mixing Box Dimensions
Table 6. Mixing Box Dimensions
Model
MAB16/20 8 25.5 16 8 9.5 36 (2) 34 x 8 75 2000 0.07
MAB30/40 12 32 20 10 10 48 (2) 46 x 12 131 4000 0.03
MAB60/80 14 45 22 15 16 66 (2) 56 x 14 201 8000 0.04
Note: All dimensions in inches.
A B C D E F
Mixing Box Dimensions
Damper
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Ship Wgt.
(lbs)
Nominal
CFM
SP Loss
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MAB Installation Manual
Electric Heat
Preparation
Some items to consider prior to installing electric heat are
as follows:
• Duct materials must be suitable for 250ºF operation.
See NFPA 90A and 90B pamphlet.
• Ensure ample room exists in the ductwork. Electric
heat must have at least 24 inches of straight duct
clearance before an elbow. If 24 inches are
unavailable, devices such as turning vanes or baffles
may be required.
Note: Electric heaters are incompatible with discharge
grille plenum.
Installation
Use the following information to install electric heat on
MAB models.
Position heater element section over the blower
1.
wheel of the MAB unit.
Note: Heater baffle must be alig
blower cut-off scroll. Heater should be rotated
180 degrees, if necessary to align. This
ensures proper blower discharge of air over
the heater element.
Attach electric heat plenum to MAB unit using #6 or
2.
larger sheet metal screws.
Note: Ensure plenum is securely attached to
MAB unit only and not to blower wheel
extension.
3. Add insulation, if necessary to outside of plenum.
Warning: Do not insulate heater box.
Figure 10 shows MAB and electric heat components.
ned with the
Air Handler Startup
Check the following items before startup.
• Ensure all shipping bolts/screws are removed and all
other bolts and screws are tight.
• Never assume
nameplate is the same as the motor wired.
• Check the alignment of the sheaves and ensure the
setscrews are tight.
• Check for proper rotation of the blower pulley.
the voltage and phase on the unit
IOM-MAB-00 08-15-04
Figure 10. Modular Unit with Electric Heater
Components
• Check motor phase and rotation.
− Exchanging two of the three leads at the unit
junction box can reverse three-phase motor
rotation.
− Exchanging leads inside the motor junction box
can reverse the rotation of single-phase motors.
Refer to the motor nameplate.
− Not all installations require a starter (some
motors utilize a contactor).
• Ensure all filters are installed. Perform filter check
with all doors and panels in place.
• Check the amperage draw of the motor. The
amperage draw should not exceed the nameplate
amps shown on the motor serial plate.
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MAB Installation Manual
IOM-MAB-00 08-15-04
Operation and Maintenance
Read and heed warning and danger notices before
operation and maintenance
DANGER
DISCONNECT ELECTRICAL POWER TO ALL
CIRCUITS BEFORE SERVICING UNIT. FAILURE TO DO
SO MAY RESULT IN PERSONAL INJURY FROM
ELECTRICAL SHOCK OR MOVING PARTS.
Return Air Filters
Inspect return air filters on a regular basis (at least
monthly). Clean or replace filter(s). Filter can be accessed
from either side of unit.
Caution: Always operate unit with a filter and/or
filter access door closed to avoid blower motor
damage.
Coil
The coil is easily cleaned when dry. To check or clean,
remove unit access panel, filter access door and filter(s).
Use accepted industry methods for cleaning. Remove all
foreign matter from pan and condensate drain line. Check
for rust and holes.
Belt and Pulley
The following list highlights items to consider for belt and
pulley maintenance and adjustment.
• Proper pulley alignment and belt tension mu
maintained at all times.
• Reduce speed by adjusting pulley faces so the faces
are further apart.
• Increase speed by moving the faces closer together.
• Check pulley setscrews and bolts.
st be
Motor
Proper lubrication is essential to long motor life. Use
electric motor oil or SAE20 non-detergent oil. Tighten
motor mount bracket and base bolts.
Note: Avoid over-oiling the motor. If a motor is overoiled, the oil may run down the motor shaft and
splatter.
Blower
Periodically check bearing for wear. Replace as required.
Check wheel for dirt accumulation and clean as required.
Abbreviations
The following table lists the abbreviations found within this
document.
bbrev. Term
A
CFM cubic feet per minute
F.P.T. Female pipe thread
lbs pounds
OD outside diameter
PVC polyvinyl chloride
SAE Society of automotive Engineers
SP static pressure
SWT sweat
wgt. weight
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