Modine Manufacturing PD Replacement page 2

2. Reassemble all parts in the reverse order of disassembly.
Special Precautions
1. Tighten all screws at seal points when replacing panels to
the Heat Exchanger headers to provide an affective seal. A
tight seal around header is important to prevent premature
failure of Heat Exchanger.
2. When replacing Burner (13) be certain slots at front of Burner
are located properly on shoulder rivets and the retaining pins
are returned to their original holes. Double check to see that
burner ports are lined up directly in center of heat exchanger
tubes.
Figure 2.1
Exploded View of Typical Gas Unit Heater - Non Separated Combustion
Commercial HVAC R Division • Modine Manufacturing Company • 1500 DeKoven Avenue • Racine, Wisconsin 53403-2552
&
Phone: 1.800.828.4328 (HEAT) • FAX: 1.262.636.1665 • www.modine.com
© Modine Manufacturing Company 2003
3. When replacing Manifold (17) return to position marked
during disassembly. Line up gas orifices directly in line with
Burner (13) mixer tubes. Adjust Manifold (17) position and/or
primary air control to obtain proper combustion if necessary.
Refer to your specific Installation and Service Manual for
adjustments.
4. Check for gas leaks from pilot tubing at the combination gas
control (CGC) and the pilot burner, also check where unit
was disconnected from the gas supply.
7/03 - Litho in USA