Reznor X Unit Installation Manual - Manual (Page 28)

Form I-X, P/N 150491 R10, Page 28
Converting Model X Duct Furnace for Lower Temperature
Rise and Higher CFM Application
WARNING
This conversion shall be done by a qualified service agency in accordance with the manufacturer’s
instructions and all applicable codes and requirements of the authority having jurisdiction. If the
information in these instructions is not followed exactly, a fire, explosion or production of carbon
monoxide may result causing property damage, personal injury or loss of life. The qualified service
agency performing this work assumes responsibility for the conversion of this appliance to provide
for higher CFM.
WARNING
The instructions in this sheet are designed to prepare a Reznor duct furnace for increased air
throughput conversion prior to installation. If your duct furnace is installed, for your safety, turn off
the gas and the electric before servicing.
NOTE: If airflow is being
reversed or other field-
installed options apply, refer
to the other information
in Paragraph 3.2 before
performing this conversion.
Description/Application
1. Fill in the Field Conversion Label - Remove the conversion label, P/N 263310,
from the literature bag. Complete the information.
This Reznor duct furnace was factory assembled with the air throughput range listed
on the rating plate. The conversion in these instructions will change the air throughput
range as specified in the table below.
Model and
Size
High Air Throughput (CFM)
MAXIMUM MINIMUM
X 75 2765 735
X 100 3685 980
X 125 4605 1225
X 150 5530 1475
X 175 6450 1720
X 200 7370 1965
X 225 8295 2210
X 250 9215 2455
X 300 11060 2945
X 350 12900 3440
X 400 14745 3930
Verify the size on the heater rating plate. After confirming that the conversion is appro-
priate for the unit, follow the instructions.
(date)
(name & address of company making this conversion)
263308
APPENDIX
FIGURE 27 - Fill in the
Information on the
Conversion Label
2. Remove the Heat Exchanger Baffles - Refer to FIGURE 28 and identify the air baffles
to be removed. Remove the screws from the support brackets and slide the entire
baffle assembly out of the heat exchanger. Reinstall the screws to plug the holes.