Titus RAB User Manual
Installation Manual
IOM-RAB-00 08-15-04
RAB Rooftop 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
Unit Cabinet Dimensions...................................................2
Service Data......................................................................2
Shipping Weight ................................................................2
Installation...............................................................3
Ductwork ...........................................................................3
Duct Insulation and Vapor Proofing................................... 4
Sound Attenuation............................................................. 4
Condensate Drain .............................................................4
Water Piping......................................................................4
Motors and Drives .............................................................4
Electrical Connections....................................................... 4
Installation of Options............................................5
Manual Air Damper ...........................................................5
Motorized Air Damper .......................................................6
Roof Curbs ........................................................................ 8
Air Handler Startup................................................. 9
Operation and Maintenance ..................................9
Return Air Filters ...............................................................9
Coil ....................................................................................9
Belt and Pulley ..................................................................9
Motor ................................................................................. 9
Blower ...............................................................................9
Abbreviations........................................................ 10
This guide does NOT supersede or circumvent any
applicable national, state, or local codes.
The installation is to be performed only by individuals
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
any or all specifications or designs without incurring
obligations.
the right to discontinue or change without notice,
Safety
The installation and/or servicing of comfort conditioning
equipment can be hazardous due to system pressures
and electrical devices.
Caution: Only trained/qualified personnel 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-en
ELECTRIC SHOCK CAN CAUSE DEATH.
ergize some equipment.
DANGER
Inspection
Introduction
This document provides installation, operation, and
maintenance information for the Titus Rooftop Air Handler
Belt Drive (RAB) models.
Additional information may be found at the Titus website,
www.titus-hva
c.com.
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.
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.
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
This section provides model features, number
nomenclature, various unit dimensions, and shipping
weights.
Model Number Specification
Figure 1 defines model number nomenclature specifics.
RAB Installation Manual
Unit Cabinet Dimensions
Figure 2 provides dimensional callouts that correspond
to Table 1 information.
Service Data
Table 1 provides RAB model dimensions. Table 2
provides information such as tonnage, free area, water
coil connections, and filter sizes.
IOM-RAB-00 08-15-04
Shipping Weight
Table 3 provides RAB shipping weights (weight for 4row and 6-row chilled water coil includes weight for
entire unit).
Figure 1. Air Handler Model Number Nomenclature
Figure 2. RAB Dimensions
Table 1. RAB Unit Dimensions
Model
RAB08 67.3 39.5 22.5 12 26 11.9 8.9 10 8 35.5 14.2 28.4
RAB12 67.3 39.5 22.5 12 26 11.9 8.9 10 8
RAB16 72 48 26.5 12 34 14.1 9.5 10 8
RAB20 72 48 26.5 12 34 14.1 13.1 10 8 35.5 18 36
RAB30 72 53 40.5 14 44 16.4 13.4 15 8 37 24.3 46.1
RAB40 75 53 40.5 14 44 16.4 13.4 15 8 37 24.3 46.1
RAB60 75 53 54 14 44 16.4 19.4 15 8 41.2 33 46.1
RAB80 94 74 53.5 14 62 19 22 15 8 48.5 46 68.2
A B C D E F G H J K L M
Dimensions (inches)
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35.5
35.5
14.2 28.4
18 36
N
2.5
2.5
3
3
12.3
12.3
25.8
17.5
RAB Installation Manual
Table 2. Service Data
IOM-RAB-00 08-15-04
Model
RAB08 2 800 2.0 ¾ ¾ 5/8 16 x 32
RAB12 3 1200 3.0 ¾ 7/8 7/8 16 x 32
RAB16 4 1600 4.0 7/8 1-1/8 7/8 (2) 20 x 20
RAB20 5 2000 5.0 1-1/8 1-1/8 1-1/8 (2) 20 x 20
RAB30 7.5 3000 8.1 1-3/8 1-5/8 1-1/8 (2) 16 x 20
RAB40 10 4000 9.5 1-3/8 1-5/8 1-1/8 (2) 16 x 20
RAB60 15 6000 12.8 1-3/8 1-5/8 1-3/8 (3) 16 x 20
RAB80 20 8000 17.5 1-3/8 1-5/8 1-18
Note: All water coil connection sizes are outside diameter (OD) sweat (SWT) dimensions.
Nominal
Capacity
Model
RAB08 13 280 290 90 85 50 120
RAB12 18 280 290 90 85 50 120
RAB16 25 315 340 135 95 95 220
RAB20 30 410 420 135 95 95 220
RAB30 40 540 550 175 105 125 300
RAB40 45 580 590 175 105 125 300
RAB60 55 745 760 180 105 125 315
RAB80 75 950 970 200 120 145 410
2-Row
Coil
Nominal
CFM
4-Row
Unit
Coil Free
Area
(Sq. Ft.)
Table 3. Shipping Weights
Shipping Weight (lbs.)
6-Row
Unit
Water Coil Connection Size (inches)
4-Row 6-Row 2-Row
Modulating
Damper
Roof
Curb Kit
Manual
Damper
Filter Size
(inches)
(2) 16 x 25
(2) 16 x 25
(3) 16 x 25
(4) 16 x 20
(4) 16 x 25
Horizontal
Modulating
Damper
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
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Ductwork
Use accepted industry practices and design guidelines of
the ASHRAE Fundamentals Handbook. Ductwork must
comply with all building codes and the NFPA pamphlet
90A and 90B.
Carefully inspect any previously installed ductwork to
determine suitability.
Note: Ductwork should be of a size meeting
requirements of the installation. Ductwork should
transition gradually from a smaller size blower outlet
to required du
air velocity.
ct run size to avoid excessive loss of
RAB Installation Manual
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 insulation may be required.
Externally insulated ductwork must have adequate vapor
seal for summer operation, especially where duct is
exposed to high humidity conditions.
IOM-RAB-00 08-15-04
Warning
Before installing unit, determine whether the unit
weight can be supported safely.
Possible injury and damage may result due to
joist/truss overloading.
When return air duct connection is smaller than return air
inlet opening, construct the transition piece so the vertical
and horizontal dimensions of transition do not increase
more than one inch for every seven inches of length.
Allow a minimum of three feet of straight ductwork
preceding equipment inlet
Sound Attenuation
Flexible duct connections should be used between the unit
and both the supply and return ducts. Requires unit
vibration isolation for suspended and base-mounted units.
Condensate Drain
Install unit with 1/8-inch pitch toward condensate drain
opening. Condensate drain must consist of a minimum of
¾-inch copper tubing, ¾-inch galvanized pi
PVC pipe. Figure 3 shows condensate drain setup. The
drain trap must be properly configured to ensure the
removal of all condensate runoff. Ensure drain pitches
downward at a 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.
pe, or ¾-inch
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 w
the leaving airside of the coil. Coils must be adequately
vented in order to prevent air binding. See Figure 4.
Note: Freeze-ups due to low air temperatures are not
covered under the warranty agreement.
ater is on
Figure 3. Condensate Drain
Figure 4. Water Piping
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: Unit must be permanently grounded in
accordance with NEC and local codes and
ordinances. See the typical wiring diagr
Figure 5.
ams shown in
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