Reznor B Unit Installation Manual - Manual (Page 5)

Form I-F/B, P/N 98126 R21, Page 5
ter, stepdown transformer, and blower/filter cabinet. After becoming familiar with the
instructions, assemble and install the options that are required for your heater.
Unless the crate bottom has been removed for option installation, leave it attached
until after the heater has been suspended. If the crate bottom has been removed, the
bottom of the heater must be supported with plywood or appropriately placed boards.
Without adequate support, the bottom access panel could be damaged.
To protect the unit during shipping, the
blower model has special supports that must
be removed before installation. Follow these instructions to remove:
□
Blower Support Legs -- Remove the two blower support legs and screws.
□
Motor Shipping Block - Remove the wooden block located under the motor bracket.
Find the two rubber pads shipped in the instruction envelope. Place these pads on the
ends of the motor bracket bolts.
□
Motor Shipping Plate -- Blower models that are equipped with motors of 3/4 HP or
less have a metal shipping plate attached between the motor and the blower hous-
ing. Remove and discard the shipping plate. Note: On units factory equipped with an
optional belt guard, the belt guard must be removed in order to reach the shipping
plate.
3.2.1 Preparing for High Altitude Installation
If the heater is being installed in an altitude above 2000 ft (610M), check the rating plate
to determine what must be done to prepare the heater for high altitude operation.
NOTE: A heater equipped with a two-stage valve must be factory-built for high altitude
installation.
Check the rating plate, determine which circumstance below applies, and follow the
instructions.
•
If the altitude range on the rating plate agrees with the altitude at the site, no
further action is required. Proceed with the installation.
• If the altitude range on the rating plate reads "Sea Level" and the altitude at
the site is above 2000 ft (610M) and the heater has a single-stage gas valve,
install the heater and follow the instructions in Paragraph 6.2.1 to derate by
manifold gas pressure adjustment.
3.2.2 Assembling Vent Outlet
All heaters are designed for either a horizontal or vertical vent outlet. Sizes 25, 50, 75,
100, 165, and 200 are shipped with the vent outlet installed in the horizontal position.
Sizes 125, 250, 300, and 400 require field assembly of the vent outlet. Select and fol-
low the instructions that apply.
When the outlet is in the horizontal position, it is recommended that a 12-18" (305-
457mm) piece of straight pipe be connected to the outlet before installing an elbow.
WARNING: Sizes 125, 250, 300 and 400 require field assembly
of the flue outlet. Follow the instructions carefully. Failure to
provide proper venting could result in death, serious injury
and/or property damage.
IMPORTANT VENT OUTLET INSTALLATION NOTE --
READ BEFORE CONTINUING:
The vent outlet assembly instructions and illustrations in this section show the
vent outlet being assembled in the horizontal position. To assemble the vent outlet
in the vertical position, follow the instructions REVERSING the positions of the flue
collar assembly and the cover.