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Installer’s Guide

April 2020

88-M4PW004-1B-EN

 SAFETY WARNING

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, 
and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or 
altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all pre-
cautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

M4HP6018A1000A
M4HP6024A1000A
M4HP6030A1000A
M4HP6036A1000A
M4HP6042A1000A
M4HP6048A1000A
M4HP6060A1000A

Note: 

“Graphics in this document are for representation only. 

Actual model may differ in appearance.”

Split System Heat Pump
M4HP6

Summary of Contents for M4HP6018A1000A

Page 1: ...properly installed adjusted or altered equipment by an unqualified person could result in death or serious injury When working on the equipment observe all pre cautions in the literature and on the ta...

Page 2: ...Failure to use proper service tools may result in equipment damage or personal injury SERVICE USE ONLY R 410A REFRIGERANT AND APPROVED POE COMPRESSOR OIL s s WARNING s s WARNING LIVE ELECTRICAL COMPO...

Page 3: ...e sure the roof will support the unit s weight Properly selected isolation is recommended to alleviate sound or vibration transmission to the building structure 1 The maximum length of refrigerant lin...

Page 4: ...ubbery to ensure adequate airflow Outdoor unit location must be far enough away from any structure to prevent excess roof runoff water or icicles from falling directly on the unit NOTE It is recommend...

Page 5: ...ing the unit on a support pad such as a concrete slab consider the following The pad should be at least 1 larger than the unit on all sides The pad must be separate from any structure The pad must be...

Page 6: ...ry Charge 5 4 Refrigerant Line Insulation Important The Vapor Line must always be insulated DO NOT allow the Liquid Line and Vapor Line to come in direct metal to metal contact Vapor Line Liquid Line...

Page 7: ...from the refrigerant lines For Example When the refrigerant lines have to be fastened to floor joists or other framing in a structure use isolation type hangers Isolation hangers should also be used w...

Page 8: ...e or other appropriate method every 8 ft 8 Feet Maximum Isolation Through Wall DO NOT hang line sets from ductwork Sealant Insulation Vapor Line Wall Ductwork Isolator Line Set Section 7 Refrigerant L...

Page 9: ...orrect direction of refrigeration flow away from outdoor unit and toward evapo rator coil as illustrated Braze the filter drier to the Liquid Line Continue the dry nitrogen purge Do not remove the wet...

Page 10: ...P 2 Check for leaks by using a soapy solu tion or bubbles at each brazed location Remove nitrogren pressure and repair any leaks before continuing Section 8 Refrigerant Line Leak Check 8 1 Check For L...

Page 11: ...ete blank off the vacuum pump and micron gauge and close the valves on the manifold gauge set 1 MIN Section 10 Service Valves 10 1 Open the Gas Service Valve 0350 Microns ON OFF CAP 1 4 TURN ONLY COUN...

Page 12: ...STEP 3 Replace the valve cap to prevent leaks Tighten finger tight plus an additional 1 6 turn Cap Rolled Edge to Captivate Stem Hex Headed Valve System Service Port 3 16 Hex Wrench Unit Side of Servi...

Page 13: ...11 1 24 VOLTS WIRE SIZE MAX WIRE LENGTH 18 AWG 150 Ft 16 AWG 225 Ft 14 AWG 300 Ft With M4AH6 Thermostat Air Handler Outdoor Unit R G B W1 W2 R B O Y X2 R G B C O Y W Blue 24 VAC HOT FAN 24 VAC Common...

Page 14: ...pin open results in the normal mode of operation 2 FRC_DFT Forced Defrost Short TEST_ COMMON to this pin for two 2 seconds to initiate a forced defrost Remove the short after defrost initiates Defrost...

Page 15: ...Voltage Ground Ground the outdoor unit per national state and local code requirements LIVE ELECTRICAL COMPONENTS During installation testing servicing and troubleshooting of this product it may be ne...

Page 16: ...s to apply power to the indoor and outdoor units STEP 5 Set system thermostat to ON OFF DONE CANCEL ON OFF STEP 4 Wait one 1 hour before starting the unit if compressor crankcase heater acces sory is...

Page 17: ...ient tempera ture is above 55 F For best results the indoor temperature should be kept between 70 F to 80 F STEP 1 Use the refrigerant line total length and lift measurements from Section 5 3 Total Li...

Page 18: ...bcooling 15 10 0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 REFRIGERANT LINE LIFT FT SUBCOOL CHARGING CHART CORRECTIONS TABLE FOR LINE LENGTH AND RISE Add 4 TOTAL REFRIGERANT LINE LENGTH FT inclu...

Page 19: ...essure should be ap proximately 327 PSIG This is the shown as the intersection of the Final Subcooling column and the Liquid Temperature row Table 14 2 8 9 10 11 12 13 14 179 182 185 188 191 195 198 1...

Page 20: ...FIND INTERSECTION OF OD TEMP ID W B 3 READ DISCHARGE OR SUCTION PRESSURE IN LEFT COLUMN 4 EXAMPLE 1 OUTDOOR TEMP 82 F 2 INDOOR WET BULB 67 F 3 AT INTERSECTION ACTUAL 4 DISCHARGE PRESSURE 1450 CFM IS...

Page 21: ...___ F Liquid Gage Pressure __________ PSIG Suction Gage Pressure __________ PSIG Calculating Charge Using the Weigh In Method STEP 1 Measure in feet the distance between the outdoor unit and the indoo...

Page 22: ...btained with the namplate charge plus additional charge previously added STEP 5 Return to site for adjustment Important Return in the spring or summer to accurately charge the system in the cooling mo...

Page 23: ...completed it is recommended that the entire system be checked against the following list Final phases of this installation are the unit Operational and Checkout Procedures To obtain proper performance...

Page 24: ...es on Time Unit Icing Up W H A T T O C H E C K M O D E P O W E R S U P P L Y H I G H V O L T A G E W I R I N G C O M P R E S S O R I O L R U N C A P A C I T O R S T A R T C A P A C I T O R S T A R T R...

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