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PRODIRECT™ Series
Split System Heat Pump
Installation &
Owner's Manual
MODELS:
HHP15018FA
HHP15024FA
HHP15030FA
HHP15036FA
HHP15042FA
HHP15048FA
HHP15060FA
Read this manual carefully before installation and keep it where
the operator can easily find it for future reference.
Due to updates and constantly improving performance, the
information and instructions within this manual are subject to
change without notice.
Version Date: November 21, 2024
Please visit www.mrcool.com/documentation
to ensure you have the latest version of this manual.
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Table of Contents
Troubleshooting
Related Manuals for MrCool PRODIRECT HHP15018FA
Summary of Contents for MrCool PRODIRECT HHP15018FA
- Page 1 Due to updates and constantly improving performance, the information and instructions within this manual are subject to change without notice. Version Date: November 21, 2024 Please visit www.mrcool.com/documentation to ensure you have the latest version of this manual.
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Page 2: Table Of Contents
6.5 Temperature Sensor Resistance Table .................21 6.6 Electrical Data Table ......................21 6.7 Troubleshooting Table ....................22 6.8 Fault Code Table ......................23 POST-INSTALLATION ........................23 7.1 Maintenance ........................23 7.2 Removing & Installing the Cover Plate ................23 7.3 Changing the Motor ......................24 7.4 Operational & Checkout Procedures................24 mrcool.com... -
Page 3: Safety Precautions
If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. 4. Do not touch the top of the compressor, as it may cause minor to severe burning. mrcool.com... -
Page 4: Installation Preparation
If possible, avoid locations that are likely to • Figure 2.2 accumulate snow drifts. If not possible, a snow drift barrier should be installed around the unit to prevent a build-up of snow on the sides of the unit. mrcool.com... -
Page 5: Pre-Installation Steps
The pad location must comply with National, State, and Local codes. • NOTE These instructions are intended to provide a method to tie-down system to concrete slab as a securing procedure for high wind areas. Check local codes for tie-down methods and protocols mrcool.com... -
Page 6: Refrigerant
REFRIGERANT 3.1 Service Valve Connection Sizes 3.2 Refrigerant Line Sizes Suction Line Liquid Line Suction Line Liquid Line Models Model Connection Connection Optional Standard Optional Standard 18/24/30/36 18/24/ 5/16 42/48/60 30/36 42/48 1-1/8 mrcool.com... - Page 7 For 50 feet line and 5/8" suction tube, the capacity will be 17800*0.97=17266 BTU/H. Determine required line length and lift. You will need this information later. Total line length = _______________ feet Total vertical change (lift) = _______________ feet Figure 3.3 mrcool.com...
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Page 8: Refrigerant Line Insulation
Care must also be taken to isolate the refrigerant lines to minimize noise transmission from the equipment to the structure. • Comply with national, state, and local codes when isolating line sets from joists, rafters, walls, and other structural elements. mrcool.com... - Page 9 REFRIGERANT Figure 3.6 Figure 3.7 Figure 3.8 Figure 3.9 mrcool.com...
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Page 10: Line Brazing
Figure 3.11 5. Replace the pressure tap caps after the service valves have cooled. NOTE Do not over-tighten (between 40 and 60 inch-lbs. maximum). 3. Purge the refrigerant lines and indoor coil with dry nitrogen. Figure 3.14 Figure 3.12 mrcool.com... -
Page 11: Leak Check
2. Observe the micron gauge. Evacuation is complete if the micron gauge does not rise above 500 microns in one (1) minute. Once evacuation is complete, blank off the vacuum pump and micron gauge, and close the valves on the manifold gauge set. mrcool.com... -
Page 12: Electrical
225 ft. 14 AWG 300 ft. 4.2 Low Voltage Wiring Diagrams Notes: "-----" - The electric auxiliary heat connection (optional) W - Electric auxiliary heat signal W1 - First electric auxiliary heat signal W2 - Second electric auxiliary heat signal mrcool.com... -
Page 13: High Voltage Power Supply
The high voltage power supply must agree with the equipment nameplate. Power wiring must comply with National, State, and Local codes. Follow the instructions on the unit wiring diagram located on the inside of the access panel. mrcool.com... -
Page 14: High Voltage Disconnect Switch
Ground the outdoor unit per national, state, and local code requirements. 4. Wait one (1) hour before starting the unit if compressor crankcase heater is used and the outdoor ambient temperature is below 70°F. 5. Set system thermostat to ON. mrcool.com... -
Page 15: Charging: Weigh-In Method
*If line set is less than 15 feet, (e) = 0. NOTE The only mode approved for validating system charge is while in Cooling Mode. Outdoor temperature must be between 55°F and 115°F with Indoor Temperature kept between 70°F and 80°F. mrcool.com... -
Page 16: Suction Line Pressure Charging & Refrigerant Adjustment In Cooling
Outdoor Ambient Temperature = __________ °F • Indoor Ambient Temperature = __________ °F • Calculate Liquid Line Pressure = __________ PSIG • Measured Suction Line Temperature = _______ °F • For best results, the indoor temperature should be kept between 70°F and 80°F. mrcool.com... - Page 17 SYSTEM CHARGE ADJUSTMENT Design Superheat with TXV Throttle Indoor Unit Inlet DB/WB (°F) Outdoor DB (°F) 95/79 90/75 85/71 80/67 75/63 70/58 Design Superheat with Piston Throttle Indoor Unit Inlet DB/WB (°F) Outdoor DB (°F) 95/79 90/75 85/71 80/67 75/63 70/58 mrcool.com...
- Page 18 SYSTEM CHARGE ADJUSTMENT 18K HP with TXV 24K HP with Orifice 30K HP with TXV mrcool.com...
- Page 19 SYSTEM CHARGE ADJUSTMENT 36K HP with TXV 42K HP with TXV 48K HP with TXV mrcool.com...
- Page 20 3. The Suction Gauge Pressure should be approximately 133 PSIG. (This is the shown as the intersection of the Final Superheat column and the Suction Temperature row.) Design Superheat Value = __________°F Superheat Correction = __________°F Final Superheat Value = __________°F R410A Refrigerant Superheat Chart Final Superheat (°F) Suction Temp (°F) Suction Gauge Pressure (PSI) mrcool.com...
- Page 21 Record system information, pressures, and temperatures in the following reference table after charging is • complete. Reference Chart Description Value Outdoor Model Number Measured Outdoor Ambient Temperature °F Measured Indoor Ambient Temperature °F Liquid Gauge Pressure PSIG Suction Gauge Pressure PSIG Suction Line Temperature °F mrcool.com...
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Page 22: System Operation & Troubleshooting
Low Pressure > 44 PSIG, compressor and outdoor fan motor restart working (3 minute delay necessary). • NOTE In stand-by status, the compressor will not start in low pressure protection. Within 30 minutes, if 4 protection cycles occur, the system will be locked. It will restore after power cycle is complete. mrcool.com... -
Page 23: Defrost Mode
The mode will shut down in any of the following conditions: The defrosted time lasts 10 minutes. • T3 ≥ 64.4°F and T4 ≥ 28.4°F. • Compressor stops operating. • T3 ≥ 64.4°F lasts 60 seconds when T4 < 28.4°F. • mrcool.com... -
Page 24: Temperature Sensor Resistance Table
4.31 35.64 11.38 4.21 1.77 34.6 11.09 4.12 1.73 33.59 10.8 4.03 32.61 10.53 3.94 1.66 31.67 3.85 1.63 30.76 3.77 6.6 Electrical Data Table Model Minimum Circuit Ampacity (A) 15.5 17.2 26.9 29.6 34.6 Maximum Circuit Protector (A) mrcool.com... -
Page 25: Troubleshooting Table
O.D. Fan Won't Start Compressor Hums But Won't Start I.D. Blower Won't Start Defrost Unit Won't Initiate Defrost Defrost Terminates on Time Unit Icing Up C = Cooling H = Heating P = Primary Causes S = Secondary Causes mrcool.com... -
Page 26: Fault Code Table
1. Before removing the cover plate of the electronic control box, ensure screws 1-7 are removed first. 2. When reinstalling the cover plate, screws 1 and 3 must be installed at the last step to facilitate assembly and avoid damage to the waterproof sponge. mrcool.com... -
Page 27: Changing The Motor
❒ Check drain lines and be sure all joints are tight. ❒ Be sure that a return air filter is installed. ❒ Operate complete system in each mode to verify proper performance. Verify proper performance of supplementary electric heater if applicable. mrcool.com... - Page 28 PRODIRECT™ Series Split System Heat Pump 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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