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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
Revision Date: 10/11/2023
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.
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Table of Contents
Related Manuals for MrCool Signature MGM80 E Series
Summary of Contents for MrCool Signature MGM80 E Series
- Page 1 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 Revision Date: 10/11/2023 The Signature Series is NOT designed for amateur installation.
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Page 2: Table Of Contents
As with any mechanical equipment, personal injury can result from contact with sharp sheet metal edges. Be careful when you handle this equipment. *P507330-02C* Manufactured By MRCOOL LLC Hickory, KY 42051 (P) 507330-02C Save these instructions for future reference mrcool.com... -
Page 3: Unit Dimensions
(762) (660) 23-7/8 (606) (356) 15-1/2 (394) (584) 3-1/4 (83) (838) Bottom View 23-1/2 (597) Front View Capacity 045-A3 14-1/2 13-3/8 4-3/4 070-B3 17-1/2 16-3/8 6-1/4 090-B4 090-C5 19-7/8 19-1/2 110-C5 135-D5 24-1/2 23-3/8 9-3/4 mrcool.com Page 2 of 36... -
Page 4: Mgm80*E Gas Furnace
National Fuel Gas Code (ANSI-Z223.1). The National Fuel Gas Code is available from the following address: American National Standards Institute, Inc., 11 West 42nd Street, New York, NY 10036. mrcool.com Page 3 of 36... -
Page 5: Use Of Furnace As A Construction Heater
INSTRUCTIONS VOIDS MANUFACTURER’S EQUIPMENT LIMITED WARRANTY. MRCOOL This furnace may be installed in alcoves, closets, attics, DISCLAIMS ALL LIABILITY IN CONNECTION WITH basements, garages, and utility rooms in the upflow or INSTALLER’S FAILURE TO FOLLOW THE ABOVE horizontal position. INSTALLATION INSTRUCTIONS. -
Page 6: Combustion, Dilution & Ventilation Air
This space also includes adjacent rooms which are which is represented only by the standard in its entirety. not separated by a door. Though an area may appear to be unconfined, it might be necessary to bring in outdoor air mrcool.com Page 5 of 36... -
Page 7: Confined Space
(645 mm2) per 1,000 Btu (.29 kW) per hour of Outside total input rating of all gas fired equipment in the confined (Inlet Air from Crawl Space & Outlet Air to Ventilated space. Each opening must be at least 100 square inches Attic) Page 6 of 36 mrcool.com... -
Page 8: Setting Equipment
1 square inch per 4,000 Btu (645 mm² per 1.17 kW) per hour of the total input rating of all other equipment in the enclosure. Figure 5. Equipment in Confined Space - All Air from Outside mrcool.com Page 7 of 36... -
Page 9: Upflow Applications
The furnace can be installed in horizontal applications. NOTE: 20C and 20D units that require air volumes over Order horizontal suspension kit (51W10) from MRCOOL, 1800 cfm (850 L/s) must have one of the following: or use equivalent suspension method. - Page 10 ² To minimize pressure drop, the largest opening height possible (up to 14 inches) is preferred. Figure 12. Optional Return Air Base (Upflow Applications Only - For Use with A, B, C and D Cabinets) mrcool.com Page 9 of 36...
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Page 11: Filters
NOTE: Return air must not be drawn from a room where monoxide poisoning, personal injury and/or property this furnace, or any other gas fueled appliance (i.e., water damage could result. heater), or carbon monoxide producing device (i.e., wood fireplace) is installed. Page 10 of 36 mrcool.com... -
Page 12: Venting
• Resecure make-up box wires: Either pull excess wires through the blower compartment and secure using supplied wire tie, or coil excess wire and secure to the gas manifold. Figure 16. Upflow Position Left Side Vent Discharge Figure 15. Upflow Position Top Vent Discharge mrcool.com Page 11 of 36... - Page 13 • Resecure make-up box wires: Either pull excess wires through the blower compartment and secure using supplied wire tie, or coil excess wire and secure to the gas manifold. Figure 20. Horizontal Right Position Top Vent Discharge Page 12 of 36 mrcool.com...
- Page 14 Insulation for the flexible vent pipe must be an encapsulated fiberglass sleeve recommended by the flexible vent pipe manufacturer. mrcool.com Page 13 of 36...
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Page 15: General Venting Requirements
NOTE: The chimney must be properly sized per provided venting tables or lined with listed metal lining system. Figure 24. Common Venting Using Tile Lined Interior Masonry Chimney and Combined Vent Connector Page 14 of 36 mrcool.com... - Page 16 20%, the equivalent of venting tables. If the existing venting system does not two 90° elbows (0.80 x maximum common vent. meet these requirements, it must be resized. Page 15 of 36 mrcool.com...
- Page 17 90 ° elbows. For each additional 90° elbow or equivalent (for example two 45° elbows equal one 90° elbow) beyond two, the maximum capacity listed in the venting table should be reduced by 10 percent (0.90 x maximum listed capacity). Table 3. Page 16 of 36 mrcool.com...
- Page 18 Appliance Input Rating in Thousands of Btu per Hour (feet) FAN + FAN FAN + NAT FAN + FAN FAN + NAT FAN + FAN FAN + NAT FAN + FAN FAN + NAT Table 5. mrcool.com Page 17 of 36...
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Page 19: Gas Piping
GROUND JOINT UNION GROUND JOINT UNION DRIP LEG DRIP LEG FIELD PROVIDED AND INSTALLED NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 25. Possible Gas Piping Configurations - Upflow Applications Page 18 of 36 mrcool.com... - Page 20 DRIP LEG MANUAL MAIN SHUT-OFF VALVE GROUND JOINT FIELD UNION PROVIDED AND INSTALLED DRIP LEG NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 26. Possible Gas Piping Configurations - Horizontal Applications mrcool.com Page 19 of 36...
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Page 21: Electrical
When testing pressure of gas lines, gas valve must be disconnected and isolated. See Figure 27. Gas valves can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa, 14 inches w.c.). Figure 28. Interior Make-Up Box Installation Page 20 of 36 mrcool.com... - Page 22 Any humidifier rated up to one amp can be run on the cooling speed. connected to this terminal with the neutral leg of the circuit being connected to one of the provided neutral terminals. If mrcool.com Page 21 of 36...
- Page 23 E090B4 E090C5 E110C5 E135D5 DO NOT USE RED (LOW SPEED) MOTOR LEAD FOR HEATING SPEED ON E045(X)A3, E070(X)B3, E110(X)C5 AND E135D5 UNITS. RESULTING TEMPERATURE RISE WILL BE OUTSIDE OF RISE RANGE. Figure 31. Wiring Diagram Page 22 of 36 mrcool.com...
- Page 24 Most recent will be displayed first, LED off for 3 sec, then next error code is displayed, etc. To clear error codes, depress and hold button longer than 5 sec. Table 8. Diagnostic Codes for 107163-01 Control mrcool.com Page 23 of 36...
- Page 25 BLOWER OFF DELAY RED LED RECALL BUTTON Figure 32. 103217-03 Integrated Control (Automatic Hot Surface Ignition System) PARK Push Button Heating Blower Off Diagnostic LED Error Recall Delay Selector Switch Figure 33. 107163-01 Integrated Control Page 24 of 36 mrcool.com...
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Page 26: Unit Start-Up
The ignitor does not get hot Replace the upper access panel. when there is no call for heat on units with an automatic 10. Turn on all electrical power to the unit. ignition system. mrcool.com Page 25 of 36... - Page 27 While waiting for the unit to stabilize, observe the period begins. flame. Flame should be stable and should not lift from Gas is ignited, flame sensor proves the flame, and the burner. Natural gas should burn blue. combustion process continues. Page 26 of 36 mrcool.com...
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Page 28: Manifold Pressure
Consult local utility for actual local heating value. A natural to LP/Propane gas conversion Orifice Kit is required to convert this unit. Refer to kit instructions for conversion procedure. A high altitude natural Orifice Kit is required. Table 12. mrcool.com Page 27 of 36... -
Page 29: Fan Control
This manually reset switches are located on the Front of motor. It has a DC motor coupled to an electronic control the burner box. module,both contained in the same motor housing. The motor is programmed to provide constant torque at each of Page 28 of 36 mrcool.com... - Page 30 Minimum allowable set points for this altitude range. Application of a Pressure Switch with lower set point (less negative / closer to zero) is not permitted. Kit contains burner orifices and gas valve regulator spring(s). Table 14. mrcool.com Page 29 of 36...
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Page 31: Blower Performance
0.10 1415 1295 1145 1130 0.20 1355 1225 1110 1080 0.30 1330 1190 1060 1035 0.40 1290 1155 1015 0.50 1245 1115 0.60 1225 1045 0.70 1190 1000 0.80 1160 Page 30 of 36 mrcool.com... - Page 32 Page 31 of 36...
- Page 33 Page 32 of 36 mrcool.com...
- Page 34 Not Allowed 135-5 Not Allowed Allowed Factory Setting Not Allowed Not Allowed Table 15. Allowable Circulation Speeds Models Yellow Blue Brown Black All Models Factory Setting Not Allowed Not Allowed Not Allowed Not Allowed Table 16. mrcool.com Page 33 of 36...
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Page 35: Service
Remove any blockage. Figure 37 shows burner detail. Reinstall burner box, manifold assembly and burner box cover. Re-install gas supply and turn on electrical power to furnace. Page 34 of 36 mrcool.com... -
Page 36: Repair Parts List
Figure 37. Burner Assembly Removal Repair Parts List The following repair parts are available through independent MRCOOL dealers. When ordering parts, include the complete furnace model number listed on the CSA International nameplate. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier. -
Page 37: Requirements For Commonwealth Of Massachusetts
The sign shall read, in print size no less equipment at the completion of the installation. than one-half (1/2) inch in size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS.” Page 36 of 36 mrcool.com... - Page 38 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.
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