Ltu 80-175 Series - Heater Assembly - Space-Ray LTU SERIES Installation And Operation Instructions Manual

5.1) LTU 80-175 SERIES — HEATER ASSEMBLY
1. Place the flanges of the control end reflector (packaged with the 15' body section) flush with the end of the body
reflector. Secure by sliding the speed clips onto the reflector edges. Evenly space the speed clips on the sides and top of
the reflector to provide a snug fit. Place the foot end reflector (not shown) on the opposite end of the body reflector and
secure as described above. DO NOT relocate the tube support/hanger brackets, especially at the control end of the
heater. Slide the reflector toward the U-bend and leave a 3" space between the control end reflector and the control box.
2. Attach the control box and gasket to the right hand tube flange and secure with the ¼-20 locknuts. The control box must
be mounted with the perforated fresh air plate on top, facing the ceiling.
3. Attach the draft inducer assembly and gasket to the left hand tube flange and secure with the ¼-20 locknuts. A flue
restrictor plate is attached to the draft inducer weld stud. Make sure this remains in place while the draft inducer is
being attached to the heater body. NOTE: The draft inducer can be mounted in either a vertical, a 45º angle, or a
horizontal position. Refer to the diagram on multiple hanging and draft inducer positions (Section 15.1).
4. Take the end of the SJO cable from the junction box and insert it through the 3/8" connector of the control box. Connect
the wire leads of the SJO cable to "1" and "2" of the terminal block. Refer to the Connection Wiring Diagram (Section
18.0). Tighten the screws of the connector.
5. If the heater is to be VENTED to the outside of the building, place the 4"x6" starting collar onto the outlet of the draft
inducer and secure with the #8-32 screws and nuts. Place the flue pipe directly onto the starting collar, secure with the
#8 sheet metal screws, and terminate with an approved vent cap.
6. If the heater is for UNVENTED use, place the exhaust hood (supplied as an accessory) directly onto the outlet of the draft
inducer (starting collar is not necessary for unvented use). Secure with the #8 sheet metal screws. The exhaust hood
must be mounted only in an upright position and directed towards the reflector body.
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Form #43155260
Mar–05