Reznor B Unit Installation Manual - Manual (Page 20)

Form I-F/B, P/N 98126 R21, Page 20
6. Mechanical
6.4 Unit Discharge
All fan type Model F heaters are factory equipped with horizontal louvers. Depending
on how it was ordered, a blower-type Model B heater may be factory equipped with
either horizontal louvers or a duct flange.
There are also field installed outlet options that may have been ordered. These options
are shipped separately and include installation instructions; see Paragraphs below for
a brief description.
Sheetmetal Screw
Top Support
Top Front
Panel
Vertical
Louver
(left side)
Vertical
Louver
(right side)
Bottom
Support
Bottom Front Panel
Sheetmetal
Screw
FIGURE 20 - Optional
Vertical Louvers
6.4.2 Downturn Air
Nozzles, Options
CD2, CD3, CD4, and
CD5 - Applies to
Model F and B as
listed
“A”
“A”
FIGURE 21 - Optional
Downturn Nozzles
Option CD2 Nozzle and CD4 Nozzle with Vertical Louvers
Option CD3 Nozzle and CD5 Nozzle with Vertical Louvers
(NOTE: CD5 applies to Model B only.)
Sizes "A" Range of Air Deflection
25-125 9" (229mm) 25°-65°
165-400 13" (330mm) 25°-65°
Sizes "A" Range of Air Deflection
25-125 6-1/2" (419mm) 50°-90°
165-400 23-1/2" (597mm) 50°-90°
CAUTION: To avoid
getting burned, adjust
louvers prior to heater
operation. If louvers
need re-adjusting
after start-up, wear
protective gloves.
6.4.3 Field-Installed
Duct Flange, Option
CD9 - applies to
Model B only
Blower-type unit heaters may be connected to ductwork. The duct flange option is
designed to adapt the heater outlet (supply side) for connection to ductwork.
Ductwork connection sizes are shown in the chart below.
Follow the installation instructions included with the option package.
CAUTION: An external duct system static pressure not within the limits shown on the rating plate or improper
adjustment of the motor pulley or belt may overload the motor and/or damage the heat exchanger.
Duct Connection Sizes with Optional Duct Flange
Model B Size 25-50 75 100 125 165 200 250-300 400
Height
inches 15-7/8 15-7/8 15-7/8 15-7/8 23-7/8 23-7/8 23-7/8 23-7/8
mm 403 403 403 403 606 606 606 606
Width inches 10-3/4 12-3/4 14-3/4 20-1/2 17-1/2 20-1/2
26 34-1/4
mm 273 324 375 521 445 521 660 870
Unit heaters may be specified with optional downturn air nozzles to direct the discharge
tempered air. The nozzles are shipped separately for field assembly and installation.
The horizontal louvers are removed from the heater and re-installed into the outlet of
the downturn nozzle.
The addition of a downturn nozzle requires four-point heater suspension. Two hanger
brackets are included with downturn nozzle options and must be added to fan-type
heaters with standard two-point suspension. Suspension point dimensions are found
in Dimension Charts in Paragraph 4.2. On fan-type heaters, do not install Option CD5
or use vertical louvers with Option CD3.
6.4.1 Vertical
Louvers, Option CD1
- Apply to F and B
The purpose of the addition of
optional vertical louvers is to increase
the air pattern spread. The vertical
louver assembly is designed to be
field assembled and installed.
Refer to the instructions packaged
with Option CD1 for a list of compo-
nents and step-by-step installation
instructions. (Do not add optional ver-
tical louvers to a fan-type heater with
downturn nozzle Option CD3.)