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507787-01C mrcool.com Page 1 of 22
Save these instructions for future reference
INSTALLATION INSTRUCTIONS
MAHM*CTA Series Air Handler
(P) 507787-01C
Manufactured By
MRCOOL LLC
Hickory, KY 42051
This manual must be left with the homeowner for future reference.
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.
Table of Contents
......2
Shipping and Packing List ...........................................3
General........................................................................3
Requirements ..............................................................3
Installation Clearances ................................................4
Installation ...................................................................4
Condensate Drain........................................................7
Duct System and Filters ..............................................8
Brazing Refrigerant Lines............................................9
Sealing the Unit .........................................................12
Electrical Connections...............................................12
..............................16
Check-Out Procedures..............................................18
Operation...................................................................18
..........................................19
Repairing or Replacing Cabinet Insulation ................19
Professional Maintenance .........................................20
Use of Air Handler During Construction.....................20
IMPORTANT INFORMATION FOR INSTALLER
This unit has a delay relay that delays the supply blower “ON” for 1 second and keeps the blower “ON” for 45
seconds on all fan and cooling demands. For more details, refer to page 18 for unit sequence of operation.
1
SECOND
DELAY
OFF
100%
CFM
100%
CFM
45
SECS
COOLING
DEMAND
1
2
3 4
*P507787-C*1
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