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55 LH32DB201 6 Split^Cliifflecjpf* (1/4-in. Male, Both Cm _ifJu !;>U 66175D55 1 Wire Tie HY76TB125 1 J^witch HK02LB018 1 Ple~Niii8eih.l-BfX 1 1/2-in.) CA01CA006 9ÎSà«#ôwg/8 In.) CA15RA001 1 Ye'ïfow~WÎrëS:Assé^ibly (33 in.) W183Y23-04—033 2 Gas Control Conversion Label 310148-301 1 Conversion Responsibility Label 310167-354 1 Installation Instruction 58D.S-28SI 1 Conversion Rating Plate 310168-384 1 DESCRIPTION AND USAGE This kit is designed for use in converting natural gas 100 percent shut-off HSI controls to propane 100 percent shut-off HSI controls. The kit is for use in gas-fired condensing furnaces with 40,000-through 120,000-Btuh nominal capacity. Additional parts may be shipped in the kit; when the installation is complete, discard the unused parts. The definition of 100 percent shut-off refers to automatic shut- off of the burner gas when the burner flame is not proven. During normal operation, if the burner flame is not proven within 2 seconds after the ignitor is de-energized, the control will deenergize the gas valve and will repeat the ignition cycle. If the flame is not proven after the fourth cycle, the control will lock out until it is electrically reset. Electrically reset the control by setting the room thermostat below room temperature for approximately 30 seconds, or by turning off the electrical supply. INSTALLATION Step 1—Installation of Burner Orifices NOTE: See Fig. 1 or 2 for component location on upflow or downflow furnaces, respectively. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 Tab 6a 8a PC 101 Catalog No. 565-972 Printed in U.S.A. Form 58D.S-28SI Pg1 8-91 Replaces: 58D.S-21SI Fig. 1—Furnace Components (Upflow Furnace) A85156 Fig. 2—Furnace Components (Downflow Furnace) A88208 1. Turn off gas and electrical supplies to furnace. 2. Remove control compartment access door. 3. Remove burner enclosure front. 4. Remove combustion-air diffuser. (See Fig. 3.) NOTE: Before removing burners, note routing of wiring in burner compartment. Also, refer to label on burner enclosure front regarding wiring. -combustion- air DIFFUSER 5. Remove screws that secure burner bracket and remove bracket. Remove burners carefully, from left to right, to prevent damaging ignitor. 6. Remove and discard orifices from manifold. 7. Install No. 55 burner orifices provided in kit. Finger-tighten orifices at least one full turn to prevent cross-threading, then tighten orifices with a wrench. Enough orifices are supplied in each kit for the largest furnace; discard unused orifices. In the U.S., the full input rating with No. 55 burner propane orifices is approved for altitudes up to 2000 ft. The input rating for altitudes above 2000 ft must be reduced by 4 percent for each 1000 ft above sea level. Consult the current edition of the National Fuel Gas Code NFPA No. 54/ANSI Z223.1, Part 8.1 and Appendix F, Table F-4, for input adjustment for high altitude. In Canada, the adjustments must be made in accordance with the CAN/C.G.A.-B149 Installation Code. 8. Reinstall burners, from right to left, and burner bracket. Ensure that burner crossovers are aligned. See Fig. 4 and 5 for proper orientation of ignitor and burners. Ensure wiring is routed properly; see label on burner enclosure front regarding wiring. & ~o r 11/32" IGNITOR ASSEMBLY A91064 Fig. 4—Position of Burner and Ignitor (Side View) A91064 Fig. 3—Combustion-Air Diffuser Location A84153 Fig. 5—Position of Burner and Ignitor (Top View) WA 9. Reinstall combustion-air diffuser with vents to front. (See Fig. 3.) 10. Do not reinstall burner enclosure front at this time. Step 2—Conversion of Gas Valve and Inlet Gas Pressure Check 1. Remove regulator seal cap. (See Fig. 6.) REGULATOR SEAL CAP -REGULATOR ADJUSTMENT SCREW REGULATOR SPRING (PROPANE - WHITE, 6 TURNS NATURAL - SILVER, 10 TURNS) CONTROL KNOB GAS PRESSURE REGULATOR BURNER ENCLOSURE REFERENCE PRESSURE TAP MANIFOLD PRESSURE TAP Fig. 6—White-Rodgers 36E Gas Valve A90224 2. Remove regulator adjustment screw and natural gas regulator spring (silver). 3. Install white propane regulator spring provided in kit. 4. Replace regulator adjustment screw. Do not reinstall regulator seal cap at this time. 5. Remove 1/8-in. pipe plug from inlet pressure tap on gas valve. (See Fig. 7 or 8.) PRESSURE SWITCH (LGPS) A88209 Fig. 7—Installation of Pressure Switch (Downflow Furnace) 6. Check inlet propane gas pressure as follows: A87420 Fig. 8—Installation of Pressure Switch (Upflow Furnace) NOTE: This kit is to be used only when inlet propane gas pressure is between 11.0-in. wc and 13.6-in. wc. a. Attach manometer at inlet pressure tap on gas supply side of furnace gas valve. A CAUTION Do not operate furnace more than one minute to check inlet gas pressure since conversion is not complete at this time. b. Set room thermostat to “c...

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