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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
MAHM*CTA AIR Handler
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
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Summary of Contents for MrCool Signature MAHM CTA 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 MAHM*CTA AIR Handler 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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Page 2: Table Of Contents
For more details, refer to page 18 for unit sequence of operation. 100% 100% SECOND COOLING DELAY DEMAND SECS *P507787-C*1 Manufactured By MRCOOL LLC Hickory, KY 42051 (P) 507787-01C Save these instructions for future reference 507787-01C mrcool.com Page 1 of 22... - Page 3 SIDE VIEW 036 / 042 Dimensions 43-1/2 1105 45-1/2 1156 1194 53-5/8 1362 1397 59-3/4 1518 18-1/2 18-1/2 18-1/2 21-1/2 21-1/2 21-1/2 16-1/2 16-1/2 16-1/2 19-1/2 19-1/2 19-1/2 16-1/4 16-1/4 16-1/4 19-1/4 19-1/4 19-1/4 Page 2 of 22 mrcool.com 507787-01C...
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Page 4: Shipping And Packing List
Take the Installation of Warm Air Heating and Air-Conditioning Systems (latest edition). and protective clothing. The air handler is shipped from the factory completely connection of the duct system. 507787-01C mrcool.com Page 3 of 22... -
Page 5: Installation Clearances
For ease in installation, it is best to make any necessary humid space. place. • If installed in an unconditioned space, sealant should Refrigerant Metering Device MAHM*CTA cabinet. expansion valve or an RFC device. Page 4 of 22 mrcool.com 507787-01C... - Page 6 Pull the coil assembly from unit. Pull off the horizontal drain pan. Remove the drain plugs from back drain holes on panels if installing in the horizontal position. horizontal drain pan and reinstall them on front holes. 507787-01C mrcool.com Page 5 of 22...
- Page 7 180° to the UP position. pan as illustrated in Figure 4. See ECBA25 installation instructions for more details. DOWN-FLOW RAIL FRONT EDGE OF HORIZONTAL DRAIN PAN Figure 5. Page 6 of 22 mrcool.com 507787-01C...
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Page 8: Condensate Drain
P-TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J-TRAP 91P90. PIPE NIPPLE PROVIDED IN BAG ASSEMBLY - SCH 80, 3/4” I. D. X 5” - 34K7401 (1): CUT THE PIPE IN HALF AND USE IT TO ROUTE THE MA IN DRAIN. Figure 7. 507787-01C mrcool.com Page 7 of 22... -
Page 9: Duct System And Filters
(see Figure 7). Make sure Filters Model Filter Size – in. NOTE: -018, -024, -030 15" x 20" x 1" -036, -042, -048, -060 18" x 20" x 1" Table 1. Unit Air Filter Size Chart Page 8 of 22 mrcool.com 507787-01C... -
Page 10: Brazing Refrigerant Lines
1/4 (6) DIA. (38) conditioning system, use a regulator that 2−HOLES (13) "A" UNIT SIZE (6.9 to 13.8 kPa). -018, -024, 18-3/8" -030 -036, -042, 21-1/2" -048, -060 Figure 9. Cabinet and Duct Flange 507787-01C mrcool.com Page 9 of 22... - Page 11 Reinstall the rubber grommets into the refrigerant piping panel. NOTE: not touching metal edges or copper tubing. Make sure outdoor unit has been placed according to the Installation Instructions and is connected to the refrigerant lines Page 10 of 22 mrcool.com 507787-01C...
- Page 12 COOL BEFORE REMOVING WET RAG FROM CTXV SENSING BULB AND PIPING PANEL AREA. REPEAT PREVIOUS PROCEDURE FOR LIQUID REFER TO INSTRUCTIONS PROVIDED WITH OUTDOOR LINE. UNIT FOR LEAK TESTING, EVACUATING AND CHARGING PROCEDURES Figure 10. Brazing Connections 507787-01C mrcool.com Page 11 of 22...
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Page 13: Sealing The Unit
1 through 4 in the Canadian Electric Code, Part I, CSA Standard C22.1. • • single phase, 60 cycles. For 208-volt applications, see “208 Volt Conversion” later in this section. in one opening. Page 12 of 22 mrcool.com 507787-01C... - Page 14 Failure to do so can result in death or electrical shock. SIDE 208 / 240 VOLT TRANSFORMER PRIMARY SECONDARY Figure 11. Electrical Connections NOTE: 240 Volts 208 Volts in Figure 12. Figure 13. Converting Unit from 240VAC to 208VAC 507787-01C mrcool.com Page 13 of 22...
- Page 15 Figure 14. Typical Wiring Diagram MAHM*CTA Page 14 of 22 mrcool.com 507787-01C...
- Page 16 Figure 15. Typical Wiring Diagram MAHM*CTA 507787-01C mrcool.com Page 15 of 22...
- Page 17 If the outdoor unit is smaller than the maximum cooling chart in Table 2. harness connector. NOTE: supplies before servicing. Replace all panels. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. Page 16 of 22 mrcool.com 507787-01C...
- Page 18 1049 1001 MED LOW 1624 1594 1565 1520 1492 -060 1815 1783 1758 1730 1685 MED HIGH 1903 1869 1837 1809 1764 HIGH 1981 1957 1923 1893 1861 • • • Table 2. MAHM*CTA 507787-01C mrcool.com Page 17 of 22...
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Page 19: Check-Out Procedures
Set the thermostat 5ºF higher than the indoor and W is completed, and the heat sequencer is energized. should cycle off. on the thermostat sub-base, or they may also be connected to a second stage on the sub-base. Page 18 of 22 mrcool.com 507787-01C... -
Page 20: Repairing Or Replacing Cabinet Insulation
1. CUT INSULATION IN X PATTERN 2. APPLY GLUE • 3. PRESS GLUED TABS AGAINST CABINET Figure 19. 507787-01C mrcool.com Page 19 of 22... -
Page 21: Professional Maintenance
(less than 50psi). If the coil cannot be cleaned using • maintained during construction. thoroughly after cleaning. • completion. • The air handler evaporator coil, supply fan assembly (salt). • according to these installation instructions. Page 20 of 22 mrcool.com 507787-01C... - Page 22 Temperature Rise = __________ Electrial Connections Tight THERMOSTAT DRAIN LINE Adjusted and Programmed Leak Free Operation Explained to Owner Explained Operation of System to Homeowner Technician’s Name:_______________________Date Start−Up & Performance Check Completed__________ Figure 20. 507787-01C mrcool.com Page 21 of 22...
- Page 23 Temperature Rise = __________ Electrial Connections Tight THERMOSTAT DRAIN LINE Adjusted and Programmed Leak Free Operation Explained to Owner Explained Operation of System to Homeowner Technician’s Name:_______________________Date Start−Up & Performance Check Completed__________ Figure 21. Page 22 of 22 mrcool.com 507787-01C...
- Page 24 Signature Series MAHM*CTA Air Handler 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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