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From inside (document excerpt):
58MCA, 58MXA Multipoise Gas-Fired Condensing Furnace Installation, Start-Up, and Operating Instructions For Sizes 040–120 Series 111 CANADIAN GAS ASSOCIATION ® ama A PP R O VED R A93040 NOTE: Read the entire instruction manual before starting the installation. Index Page SAFETY CONSIDERATIONS 1-3 Dimensional Drawing .2 Clearances to Combustibles 3 INTRODUCTION .3-4 APPLICATIONS 4-11 General 4 Upflow Applications 4-6 Downflow Applications .6-8 Horizontal Left (Supply-Air Discharge) Applications .8-9 Horizontal Right (Supply-Air Discharge) Applications .9-11 LOCATION 11-12 General 11 Furnace Location Relative to Cooling Equipment 11 Hazardous Locations .12 INSTALLATION 12-16 Leveling Legs (If Desired) 12-13 Installation On a Concrete Slab .13 Installation On a Combustible Floor (Downflow Applications) 13 Installation In Horizontal Applications 14 Filter Arrangement 14-15 Bottom Closure Panel .15 Gas Piping 15-19 ELECTRICAL CONNECTIONS .16-17 115-v Wiring 16-17 24-v Wiring .19 Accessories 19 DIRECT VENTING .19-25 Removal of Existing Furnaces from Common Vent Systems .20 Combustion-Air and Vent Piping .20-23 Concentric Vent and Combustion-Air Termination Kit Installation 23-24 Multiventing and Vent Termination Furnace .24-25 CONDENSATE DRAIN 25-29 General 25 Fig.
1–Multipoise Orientations A93041 Application .26-28 Condensate Drain Protection .28-29 SEQUENCE OF OPERATION 29-31 Heating Mode 29-30 Cooling Mode .30 Continuous Blower Mode .30 Heat Pump Mode 30 Component Test .30-31 START-UP PROCEDURES 31-35 General 31 Prime Condensate Trap With Water 31 Purge Gas Lines 31 Adjustments .31-33 Set Gas Input Rate 31-33 Set Temperature Rise 33-35 Adjust Blower Off Delay (Heat Mode) .35 Set Thermostat Heat Anticipator 35 CHECK SAFETY CONTROLS 35 Check Primary Limit Control .35 Check Pressure Switch .35 CHECKLIST .35-36 SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should install, repair, or service heating equipment. Untrained Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 565-906 Printed in U.S.A. Form 58MXA-2SI Pg 1 6-94 Replaces: 58MXA-1SI Tab