Nortek FG7MQ - English; Table of Contents

2
NOTE TO INSTALLER: This installlation manual focuses on installing the MQ furnace in a single zone only. The
MQ furnace may also be installed with the iQ Zone zoning system. The installation of the furnace itself does not
change. Additional details, such as the duct/damper design, and the low voltage wiring may be found in the following
publications:


TABLE OF CONTENTS
IMPORTANT SAFETY INFORMATION 3
 4
Combustion Air Quality ............................................... 5
Heating Load ............................................................... 5
 ................. 6
 ............................................... 6
Clearances to Combustible Materials ......................... 6
 7
 .................................................. 8
 ......... 8
 ........................................................ 8
 ..... 8
 ............................. 8
 ......................... 9
 ....................... 9
Alternate Method of Providing Air from Outside: ..... 10
 ...... 10
 .................................................... 10
 ................................................... 11
 .................................. 11
 ............................................... 11
 ............. 12
 .................. 13
 ......................................... 13
 ................................................ 13
 .................................................. 13
CIRCULATING AIR REQUIREMENTS 14
 ................................................... 14
Return Air Connections ............................................... 14
 ................................. 14
 ................................................. 15
 ............................................... 15
Acoustical Treatments ................................................. 15
FURNACE INSTALLATION 15
 ................................................ 15
 ....................................................... 15
 .................................................. 15
Bottom Panel Removal ............................................... 16
Alternate Bottom Panel Removal ............................. 16
 .......................................... 17
 ......................................... 17
Accessories ................................................................. 17
 ........................................................... 17
 ................................................... 17
 .................................................... 18
Typical Orientation ............................................. 18
Alternate Orientation .......................................... 18
 .......................................... 18
 .............................................. 19
 20
Leak Check ................................................................. 20
High Altitude Application ............................................. 20
Conversion to LP/Propane .......................................... 22
ELECTRICAL WIRING 22
 ..................................................... 23
 ...................... 23
 ...................................................... 23
 ....................................................... 23
 ......................................... 23
 .......................................... 23
 ................................................................... 23
25
 .................................................... 25
 .................................................. 25
 .................................................... 25
 ........................... 25
 ..................... 26
 .......................................... 26
 ...... 26
OPERATING SEQUENCE 26
Heating Cycle .............................................................. 26
Cooling Cycle .............................................................. 26
 .................................................................... 27
 ................................................. 27
MAINTENANCE 27
TROUBLESHOOTING 28
 29
 ....................... 29
 ................................................................. 29
 ............. 29
 ........................................................... 30
 ......................................... 30
 .................................. 30
 ..................................................... 31
 ...... 31
 ...... 31
 ......... 31

 .............................. 32
 ..................................................... 33
 .................. 33

 ..................................... 34

 ............................... 35
 .... 36
 .................................................. 37
 ............................. 37
 40