The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician. Please read this manual carefully before installation and keep it for future reference. Owner & Installation Manual Signature Series MGM80*SE-XA Warm Air Gas Furnace The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician. Please read this manual carefully before installation and keep it for future reference.
INSTALLATION INSTRUCTIONS MGM80*SE*XA Warm Air Gas Furnace This manual must be left with the homeowner for future reference. Table of Contents MGM80*EGas Furnace 2 3 3 3 11 18 20 Gas Piping 29 33 5 10 10 WARNING CAUTION *P507330-02C* MRCOOL, LLC (P) 507330-02C Save these instructions for future reference 507330-02C mrcool.
Unit Dimensions 1 NOTE -C*20 5 25 (635) D Top View 2 3 28-3/8 (721) Right Side View * 19-1/2 (495) 30 (762) A 26 (660) B 23-7/8 (606) 14 (356) 15-1/2 (394) 23 (584) 3-1/4 (83) 33 (838) Bottom View C 23-1/2 (597) Front View Capacity A in. B mm in. C mm 3 070-3 D in. mm 13 330 in. 121 090090-5 110-5 159 21 533 8 135-5 Page 2 of 35 mm 203 23 mrcool.
MGM80*SE*XA Gas Furnace Clearances MGM80*E Shipping and Packing List Installed Locations Temperature Rise NOTE: Furnace must be adjusted to obtain a temperature Installed in Combination with a Cooling Coil Safety Information DANGER DANGER OF EXPLOSION! 507330-02C mrcool.
Heating Unit Installed Parallel to Air Handler Unit Heating Unit Installed Upstream of Cooling Unit Figure 1. NOTE: COMPONENT FAILURE AS A RESULT OF FAILURE TO Use of Furnace as a Construction Heater DO NOT USE THE UNIT FOR CONSTRUCTION HEAT UNLESS ALL OF THE FOLLOWING CRITERIA ARE MET: General mrcool.
• • • WARNING • NOTE: • • • • • • • • Combustion, Dilution & Ventilation Air • • • • • • • 507330-02C mrcool.
Air from Outside NOTE: Figure 2. Inside Air from Inside NOTE: Figure 3. Outside (Inlet Air from Crawl Space & Outlet Air to Ventilated Attic) mrcool.
Setting Equipment WARNING NOTE: NOTE: Figure 4. Outside (All Air through Ventilated Attic) NOTE: Figure 6. Figure 5. Outside 507330-02C mrcool.
Type of Vent Connector Type C Type B1 Top Figure 8. Single Side Return Air 0 0 0† 0 0‡ 0‡ Removing the Bottom Panel Figure 7. Figure 9. Removing the Bottom Panel Horizontal Applications NOTE: Page 8 of 35 mrcool.
Type of Vent Connector Type C Type B1 Top 0 0 0 0 0‡ 0‡ Figure 10. Typical Horizontal Application Unit Suspended in Attic or Crawl Space Figure 11.
NOTE: WARNING NOTE: Filters Furnace Cabinet Width Filter Size Side Return Bottom Return 20 x 25 x 1 Table 1. Duct System Figure 13. Horizontal Application Unit Installed on Platform WARNING NOTE: Supply Air Plenum Return Air Plenum NOTE: Page 10 of 35 mrcool.
IMPORTANT Venting Figure 14. Mounting Screws Location • • • • Figure 16. Left Side Vent Discharge Figure 15. Top Vent Discharge 507330-02C mrcool.
• • • Figure 17. Right Side Vent Discharge • Figure 19. Horizontal Left Position Side Vent Discharge • • • Figure 18. Horizontal Left Position Top Vent Discharge • • • Figure 20. Horizontal Right Position Top Vent Discharge Page 12 of 35 mrcool.
WARNING Figure 21. Horizontal Right Position Side Vent Discharge Figure 22. Vent Connection NOTE: Venting Using a Masonry Chimney IMPORTANT 507330-02C mrcool.
• • NOTE 1: Figure 23. Masonry Chimney DO NOT IMPORTANT General Venting Requirements Figure 24. Common Venting Using Tile Lined Interior Masonry Chimney and Combined Vent Connector mrcool.
Connector Diameter in. (mm) Maximum Horizontal Connector Length ft. (m) 5 (127) 7 (178) Table 2. 507330-02C mrcool.
Capacity of Type B Double Wall Vents with Type B Double Wall Connectors Serving a Single Category I Appliance Height H (feet) Lateral L (feet) 3 inch 4 inch MIN MAX MIN MAX MIN MAX MIN MAX 0 78 0 152 0 251 0 375 2 13 51 18 97 27 157 32 232 39 153 50 227 59 223 30 25 10 15 20 91 0 0 0 2 12 57 5 23 53 8 28 0 0 2 12 88 0 109 32 103 39 98 25 0 175 0 118 23 32 113 191 5 23 57 30 51 0 0 0 2 11 15 5 22 30 10 29 59 15 35 53 0
Vent Connector Capacity Type B Double Wall Vents with Type B Double Wall Connectors Serving Two or More Category I Appliances Vent Height H (feet) Connector Rise R (feet) 3 inch 4 inch MIN MAX 1 22 37 2 23 3 8 1 22 2 23 30 6 inch 1 22 2 23 58 183 38 81 132 199 51 128 195 53 139 210 123 189 72 78 51 50 37 92 33 89 2 22 53 35 52 220 220 153 55 22 MAX 121 50 2 MIN 75 21 21 MAX 35 1 1 MIN 37 37 3 20 MAX 80 3 15 MIN 35 3 10 5 inch Appliance I
Removal of the Furnace from Common Vent WARNING CARBON MONOXIDE POISONING HAZARD Gas Piping CAUTION Gas Supply Left Side Piping (Standard) Right Side Piping (Alternate) AUTOMATIC GAS VALVE (with manual shut-off valve) MANUAL MAIN SHUT-OFF VALVE AUTOMATIC GAS VALVE (with manual shut-off valve) MANUAL MAIN SHUT-OFF VALVE GROUND JOINT UNION GROUND JOINT UNION DRIP LEG DRIP LEG FIELD PROVIDED AND INSTALLED NOTE: ONLY Figure 25. Page 18 of 35 mrcool.
Nominal Iron inches (mm) Internal Diameter (mm) 10 (3.048) 20 (6.096) 30 (9.144) 175 120 97 82 73 250 200 170 151 375 320 285 1 950 2100 2 3 3950 2750 11000 7700 23000 15800 40 50 60 70 80 90 100 (12.192) (15.240) (18.288) (21.336) (24.384) (27.432) (30.
Figure 27. Electrical ELECTROSTATIC DISCHARGE (ESD) CAUTION IMPORTANT NOTE: Leak Check NOTE: CAUTION IMPORTANT Figure 28. Page 20 of 35 mrcool.
Figure 29. NOTE: • • • • Thermostat NOTE: Accessory Terminals * Note: Figure 30. Condensing Unit Thermostat Designations Indoor Blower Speeds 507330-02C mrcool.
E045A3 E070B3 E090B4 E090C5 E110C5 E135D5 Figure 31. Wiring Diagram Page 22 of 35 mrcool.
Red LED Flash Code 1 1 NOTE Table 7. Red LED Flash Code2 1 1 2 NOTE Table 8. 507330-02C mrcool.
Terminal Designations LINE CIRC EAC COOL FAN NEUTRALS FS RED LED BLOWER OFF DELAY RECALL BUTTON Figure 32. Integrated Control (Automatic Hot Surface Ignition System) 1 ON OFF 15 Pre-Purge 39 35 Ignitor Warm-up Trial for Ignition 80 5 SEC Blower “On” Delay Post Purge Demand CAI Ignitor Gas Valve Indoor Blower Figure 33. Heating Sequence of Operation WARNING FOR YOUR SAFETY, READ BEFORE LIGHTING UNIT WARNING CAUTION mrcool.
BEFORE LIGHTING NOTE: Placing the Furnace into Operation Turning Off Gas to Unit WARNING Failure to Operate Gas Valve Operation STOP! STOP! Heating Sequence of Operation Gas Valve Shown in “ON” Position See Figure 33 Figure 34. 507330-02C mrcool.
Supply Pressure Measurement Manifold Pressure Measurement Gas Pressure Adjustment Gas Meter Clocking Chart Seconds for One Revolution Natural Capacity 1 cu ft Dial LP 2 cu ft Dial 80 -070 55 -090 33 -135 27 2 cu ft Dial 200 110 82 -110 1 cu ft Dial 272 102 NOTE: 82 Manifold Pressure Table 9. NOTE: NOTE: Manifold Pressure and Line Pressure at Various Altitudes Manifold Pressure (in. w.c.)1 Line Pressure (in. w.c.) Minimum Capacity Nat. Gas LP Gas2 Nat. Gas LP Gas2 Nat.
Proper Combustion Fan Control Capacity CO2% for Nat CO2% for LP -070 -090 -110 -135 Table 11. High Altitude Pressure Switch Figure 35. Heat Fan Off Time in Seconds Natural Capacity Pressure1 Propane Natural Propane to Natural 070 2 090 110 135 73W802 Pressure1 Propane Propane to Natural Pressure1 80W52 80W51 80W52 80W51 80W52 2 73W802 80W51 80W57 80W52 80W52 80W51 Natural 51W01 Propane 2 1 2 Table 12. 507330-02C mrcool.
Constant Torque Motor Other Unit Adjustments Thermostat Heat Anticipation NOTE: Electrical Blower Speeds NOTE: Page 28 of 35 mrcool.
Blower Performance MGM80SE045A3A Performance (Less Filter) External Static Pressure in. w.c.
High watts 715 735 750 785 1725 1800 1835 1910 cfm 525 510 watts High cfm watts bold cfm watts Medium watts High cfm Low watts Medium cfm 310 High watts 1775 320 cfm 425 1730 watts 1980 445 cfm 655 465 watts 2290 1945 cfm 185 1885 230 675 1580 695 310 2250 1750 2210 235 watts Low cfm 1555 1510 watts Low cfm 195 190 205 190 1350 205 475 1385 490 1535 1850 315 1810 215 715 230 720 1285 2165 1225 2135 275 215 255 270 285 Low 1095
507330-02C mrcool.com Page 31 of 35 External Static Pressure in. w.c.
Allowable Heating Speeds Models Red Yellow Blue Brown Black Brown Black 3 070-3 090090-5 110-5 135-5 Table 13. Allowable Circulation Speeds Models Red Yellow Blue Table 14. Page 32 of 35 mrcool.
Filters Service WARNING HAZARD. Flue and Chimney Electrical Cleaning the Burners NOTE: Blower WARNING 507330-02C mrcool.
Figure 36. Burner Assembly Removal Repair Parts List Cabinet Parts Heating Parts • • • • • Top cap • Control Panel • • • • • • • • • Blower Parts • • • • • • • • • • mrcool.
Requirements for Commonwealth of Massachusetts INSPECTION requirements: EXEMPTIONS: The following equipment is exempt from 24 CMR 5.08(2)(a) 1 through 4: INSTALLATION DETECTORS OF CARBON MONOXIDE VENTING SYSTEM PROVIDED. VENTING SYSTEM NOT PROVIDED. APPROVED CARBON MONOXIDE DETECTORS.
Signature Series MGM80*SE*XA Warm Air Gas Furnace ELECTRICIAN and/or HVAC TECHNICIAN: LICENSE #: INSTALLATION DATE: INSTALLATION LOCATION: SERIAL NUMBER: The design and specifications of this product and/or manual are subject to change without prior notice. Consult with the sales agency or manufacturer for details.
