Reznor RBL Guide
Form I-RBL, P/N163219R2, Page 1
Form I-RBL (Version A)
Obsoletes Form I-RBL/RBA/RBHA
Applies to: Blower Cabinet Model RBL
INSTALLATION / OPERATION
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CQS
CQS
Model RBL,
Indoor/Outdoor
Blower Cabinet,
5000 - 15000 CFM
1.0 General 1.1 Hazard Labels and Notices
There are warning labels on the blower cabinet and throughout this manual. For your
safety, read the denitions below and comply with all boxes labeled CAUTION, WARN-
ING, and DANGER during installation, operation, maintenance, and service of this unit.
Denitions of Hazard Intensity Labels in this Manual
HAZARD INTENSITY LEVELS of Warnings in this Manual
1. DANGER: Failure to comply will result in severe personal injury or death
and/or property damage.
2. WARNING: Failure to comply could result in severe personal injury or death
and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury and/or
property damage.
WARNING: Improper installation, adjustment, alteration, service,
or maintenance can cause property damage, injury or death.
Read the installation, operation, and maintenance instructions
thoroughly before installing or servicing this equipment.
1.0 General .......................................................................1-2
1.1 Hazard Labels and Notices ........................................ 1
1.2 General Information .................................................... 1
1.3 Warranty....................................................................... 2
2.0 Uncrating....................................................................... 2
3.0 Dimensions ................................................................... 2
4.0 Suspending and Mounting........................................2-4
5.0 Mechanical ...............................................................4-10
5.1 Unit Inlet Air ................................................................. 4
5.2 Duct Connections ....................................................... 8
5.3 Blowers, Belts and Drives .......................................... 9
5.3 Blowers, Belts, and Drives (cont'd)......................... 10
6.0 Electrical Supply and Connections...................... 10-11
7.0 Commissioning and Start-Up .................................... 11
INDEX................................................................................. 12
INSTALLATION RECORD ................................................. 12
Table of Contents
1.2 General Information
A Model RBL blower cabinet is engineered for use with Reznor®duct furnaces when
design considerations do not permit the use of a packaged system. The cabinet is
weatherized with an integral curb cap base for outdoor installation, but may also be
installed indoors. The blower cabinet has standard horizontal inlet and outlet air open-
ings equipped with duct anges and may have an optional bottom air inlet. Model RBL
is available with a downturn plenum which provides a bottom outlet for supply air.
This booklet includes installation and operation information. Installation should be
done by a qualied agency in accordance with the instructions in this manual and in
compliance with all codes and requirements of authorities having jurisdiction. Before
beginning installation, review the instructions in this booklet and become familiar with
the required procedures.
Form I-RBL, P/N163219R2, Page 2
3.0 Dimensions
FIGURE 1 - Model RBL
Dimensions - inches
(mm)
2.0 Uncrating
Model RBL Air Openings (with duct ange) inches (mm)
Standard Horizontal Inlet Air Opening 19-1/2 x 47-5/8 495 x 1210
Optional Bottom Return Air Inlet Air Opening 19-1/2 x 47-5/8 495 x 1210
Standard Horizontal Discharge Air Opening 22-1/8 x 48-15/16 562 x 1243
Btm Discharge Air Opening w/Downturn Plenum Cabinet 19-1/2 x 47-5/8 495 x 1210
Immediately upon uncrating the unit, check for any damage that may have been
incurred during shipment. If damage is found, document the damage with the trans-
porting agency and contact your Reznor Distributor. This unit was inspected at the
factory immediately prior to crating.
Check the blower cabinet plate to be sure that the electrical characteristics of the
blower cabinet are compatible with the installation site.
Be sure all shipped-separate options for the installation are available. Shipped-sep-
arate options could include a roof curb, an outside air hood, a disconnect switch, an
evaporative cooling module, and/or freeze protection kit for an evaporative cooling
module.
1.0 General
(cont'd)
Duct Opening
Dimensions
4.0 Suspending
and Mounting
FIGURE 2 -
Blower Cabinet
Suspended
by Four Rod
Hangers
Weight - Before installing the blower cabinet, check the supporting structure to verify
that it has sufcient load-carrying capacity to support the weight. Model RBL weighs
488 lbs (221 kg).
Depending on the building structure and its use, determine whether or not measures
should be taken to reduce the effect of blower vibration and/or noise. Determining the
need for and installing vibration isolation is the responsibility of the installer.
Suspending Indoor
Cabinet
Blower cabinets may be suspended using eld-furnished rod hangers. Insert 1/2" rods
into the holes at the corners of the curb cap. Attach rods to the unit as illustrated in
FIGURE 2. Attach rods to the building structure. Proper suspension of this cabinet is
the responsibility of the installer.
Mounting Outdoor
Cabinet
Model RBL blower cabinet is equipped with a load bearing curb cap which forms an
integral part of the unit. This curb cap is welded at all joints and has a "skirt" which ts
over a roof curb to provide a weatherproof installation. Use the lifting lugs provided.
1.3 Warranty
Refer to the limited warranty information on the Warranty Form in the "Owner's Enve-
lope" shipped with the unit.
Form I-RBL, P/N163219R2, Page 3
FIGURE 3 - Support Rail Dimensions
Conguration A B
Standard Model RBL 59-1/16" (1500mm) 53-9/16" (1361mm)
Model RBL with
Downturn Cabinet 82-1/16" (2084mm) 53-9/16" (1361mm)
Mounting on a Roof Curb - Whether using an optional roof curb available for the cabinet or a eld-supplied curb, the
curb must be square and level and a minimum height of 14" (356mm). The top surface of the roof curb must be caulked
with 1/4" x 1-1/4" sealant tape or 1/4" beads of suitable sealant. The cabinet must be sealed to the curb to prevent water
leakage into the curb area due to windblown rain and capillary action. Except for the curb assembly details, the informa-
tion and requirements in this section apply to both an optional curb and a eld-supplied curb. See FIGURE 5 and curb
installation instructions.
Bottom Duct Connections - Both the optional return air opening and the opening in the downturn plenum have duct
anges. Duct opening sizes and spacing in relation to an optional roof curb are shown in FIGURE 4.
The blower cabinet may be mounted on an optional roof curb, a eld-supplied roof
curb, or eld supplied supports. If the system has a downturn plenum and/or a bottom
return air opening, a roof curb is recommended to provide a weatherproof installation
as well as more workable clearances for ductwork. The blower cabinet curb cap is not
designed to be placed directly on the roof surface. When positioning rooftop equip-
ment, it is recommended that the air inlet does not face into the prevailing wind.
Mounting on Field Supplied Supports (without a roof curb) - Prior to installation,
be sure that the method of support is in agreement with all local building codes and is
suited to the climate. If considering this type of installation in snow areas, it is recom-
mended that the 4x4 wooden rails underneath the unit be on cross-support structure
at least 12" (305mm) higher than the roof surface. Whether the supports are being
mounted directly on the roof or being placed "up" on additional structure, the horizontal
length of the unit should be supported by two 4x4 treated wooden rails. Cut the rails
to the appropriate length (Dimension "A") in FIGURE 3. (NOTE: Although dimensions
are included for units with a downturn plenum cabinet, it is strongly recommended that
a roof curb be used on an installation with a downturn plenum cabinet and/or a bottom
return air duct.) Space the 4x4 wooden support rails (See "B" Dimension in FIGURE 3)
so that the curb cap "skirt" will t over the edge of the boards with the rail setting inside
the horizontal length of the curb cap.
If the rails are being laid directly on the roof, position them as shown in FIGURE 3. Set
the unit on the rails. NOTE: It is recommended that there be a minimum of 14" between
the bottom of the inlet air hood (see Paragraph 5.1.2) and the mounting surface.
If the treated wooden rails are not placed directly on the roof surface, cross supports
should be placed underneath the rails at the ends of the cabinet. The eld-supplied,
weather-resistant cross-support structure must be adequate for the weight of the unit
and run the entire width of the cabinet supporting the 4x4 wooden rails.
Dimensions G H
Standard RBL
Cabinet NA 47-5/8"
(1210mm)
RBL w/Down-
turn Plenum
55-13/16"
(1418mm)
47-5/8"
(1210mm)
FIGURE 4 - Roof Curb and Optional Duct
Opening Dimensions - inches (mm)
Return and Supply Duct Dimensions and
Locations are in relation to Reznor Optional
Roof Curbs.)
1-5/8" (41mm) is measurement from duct
opening to inside edge of roof curb.
NOTE: Cut duct openings 1" (25mm) larger
than the duct size for installation clearance.
Form I-RBL, P/N163219R2, Page 4
4.0 Suspending and Mounting (cont'd)
* C and D are roof opening dimensions.
FIGURE 5 - Roof Curb Dimensions (inches/mm)
and Installation
Curb Section Curb Corner Detail
Curb
Detail
See
FIGURE 5.
Model RBL without Optional Downturn
Plenum - Roof Curb Option CJ1
Model RBL with Optional Downturn Plenum Cabinet
(Option AQ5 or AQ8) - Roof Curb Option CJ2
A59-1/16" (1500mm) 82-1/16" (2084mm)
B53-9/16" (1361mm) 28-13/16" (732mm)
C* 55-5/16" (1405mm) 78-5/16" (1989mm)
D* 49-13/16" (1265mm) 49-13/16" (1265mm)
Optional Roof Curb
Installation Instructions
(See FIGURE 8)
Filter racks and lters are optional equipment. Filters are 2" and may be either dispos-
able, permanent aluminum, or pleated disposable.
5.0 Mechanical 5.1.1 Filter Rack and Filters, Option AW7, AW9, or AW11
The curb is shipped unassembled. Field assembly and mounting on the roof are the
responsibility of the installer. Hardware to assemble the corners is supplied, Before
installing the roof curb, verify that the size is correct for the cabinet being installed.
1. Position the curb cross rails and curb side rails as shown in FIGURE 5. Fasten
curbing pieces at all corners with bolts and lag screws as shown in the Corner
Detail illustration.
2. Check the assembly for squareness. Adjust the roof opening so that the diagonal
measurements are equal within a tolerance of ± 1/8" (3mm).
3. Level the roof curb. To ensure a good weathertight seal between the integral curb
cap and the roof curb, the roof curb must be leveled in both directions with no twist
end to end. Shim level as required and secure curb to roof deck before proceeding
with ashing.
4. Install eld-supplied ashing (See Curb Detail in FIGURE 5).
5. Before placing the unit on the curb, apply furnished 1/4" x 1-1/4" foam sealant tape
to the top surface of the curb, making good butt joint at the corners. The cabinet
must be sealed to the curb to prevent water leakage into the curb area due to
blown rain and capillary action.
5.1 Unit Inlet Air
Form I-RBL, P/N163219R2, Page 5
RBL
CFM
2" Disposable Filters
(Option AW7)
2" Permanent Filters
(Option AW9)
2" Pleated Filters
(Option AW11)
5000 0.04 0.08 0.10
6000 0.06 0.12 0.14
7000 0.08 0.16 0.19
8000 0.10 0.21 0.25
9000 0.13 0.26 0.31
10000 N/A 0.33 0.39
11000 N/A 0.40 0.47
12000 N/A 0.48 0.56
13000 N/A 0.56 N/A
14000 N/A 0.65 N/A
Disposable Filter Range --
0 to 400 FPM
Pleated Filter Range --
0 to 500 FPM
Permanent Aluminum Filter
Range -- 0 to 600 FPM
Disposable
Filters (Option
AW7)
Pleated Filters
(Option AW11)
Permanent Filters
(Option AW9)
NOTE: If the unit was manufactured prior to 9/91;
lter sizes and arrangements are different; refer to
Parts Replacement Form P-RG/RP/RBL or contact
your distributor.
Type of Filters Average Efciency Average Arrestance
Disposable 2" Less than 20% 80%
Permanent 2" Less than 20% 64% to 67%
Pleated Disposable 2" 30% to 35% 90% to 93%
A16 x 16
B16 x 25
C12 x 25
D12 x 30
A16 x 16
B16 x 25
C12 x 16
D12 x 26
A16 x 16
B16 x 25
C12 x 25
D12 x 32
FIGURE 6 - Filter Arrangements
5.1.2 Outside Air
Hoods
100% Outside Air Hood, Option AS2 - Outside air hood (Option AS2) is a weather-
ized, screened hood designed to be eld assembled and installed around the horizon-
tal inlet air opening of the blower cabinet. The air hood includes a louver assembly
designed to help eliminate moisture from the inlet air. Complete installation instructions
are packaged with the air hood option.
CAUTION: It is recommended that the inlet to the outside air
hood NOT be facing into the prevailing wind. Allow 14" minimum
clearance from the bottom of the air hood to the mounting surface.
NOTE: Either a
manufacturer designed
optional air inlet hood as
shown in Paragraph 5.1.2
or an evaporative cooling
module as shown in
Paragraph 5.1.4 is required
to ensure complete weather
resistance.
Filter Pressure
Drops (" w.c.)
Installation Instructions - 100% Outside Air Hood (See FIGURE 7B)
To avoid possible damage, it is recommended that the outside air hood be installed
after the cabinet has been placed on the roof. The air hood should be installed before
the blower is operated. Do not install the hood while the blower is in operation. All
screw ends except those across the bottom are inside the air hood.
1. Top Panel -- On the air inlet side of the blower cabinet, remove the factory-
installed screws attaching the blower cabinet top. Slide the air hood top panel
underneath the edge of the blower cabinet top. The edge of the air hood top
panel must be between the blower cabinet top and the end panel. Reinsert all
of the sheetmetal screws.
2. Side Panels -- Slide the air hood right side panel into the groove in the blower
cabinet end panel. Be sure that the side panel is underneath and to the inside of
the air hood top panel. Attach to the blower cabinet and the air hood top using the
required number of sheetmetal screws. Repeat with the left side panel.
3. Bottom Panel -- Position the air hood bottom panel so that it is to the inside of the
two side panels and above the factory-installed support angle. Attach to the side
panels.
If the bottom panel does not rest tightly against the support angle, follow these
instructions to adjust the position of the support angle:
a) Slightly loosen (do not remove the screws).
b) Slide the support angle up so that it is against the bottom panel.
c) Tighten the screws.
Table of contents
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