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ML14XP1 SPLIT SYSTEM HEAT PUMP
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, or service agency.
General
This ML14XP1 outdoor heat pump with all-aluminum
coil is designed for use with HFC-410A refrigerant only.
This unit must be installed with an approved indoor air
handler or coil. See the ML14XP1 product specifications
bulletin for approved indoor component match ups. These
instructions are intended as a general guide and do not
supersede local codes in any way. Consult authorities
having jurisdiction before installation.
NOTICE!
Charging information is given on the charging
procedure sticker on the unit access panel.
STEP 1 – SETTING THE UNIT – Clearances
See NOTES
See
NOTES
See NOTES
INSTALLATION INSTRUCTIONS
(R410A REFRIGERANT)
NOTES -
Service clearance of 30 in. (762 mm) must be maintained on one of
the sides adjacent to the control box.
Clearance to one of the other three sides must be 36 in. (914 mm).
See
Clearance to one of the remaining two sides may be 12 in. (305
NOTES
mm) and the final side may be 6 in. (152 mm).
A clearance of 24 in. must be maintained between two units.
CONTROL
48 in. (1219 mm) clearance required on top of unit.
BOX
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
IMPORTANT: Special procedures are required for clean-
ing the all-aluminum coil in this unit. See page 15 in this
instruction for information.
Page 1
CAUTION
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Summary of Contents for Allied ML14XP1
- Page 1 This unit must be installed with an approved indoor air IMPORTANT: Special procedures are required for clean- handler or coil. See the ML14XP1 product specifications ing the all-aluminum coil in this unit. See page 15 in this bulletin for approved indoor component match ups. These instruction for information.
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Page 2: Step 1 - Setting The Unit
This will diminish unit performance and longevity SIDE VIEW PLACEMENT INSTALL UNIT AWAY FROM WINDOWS Model Number ML14XP1-036 28-1/4 (718) 37-1/4 (946) ML14XP1-048 32 1/4 (819) 37-1/4 (946) ML14XP1-060 32 1/4 (819) 43-1/4 (1099) FIGURE 1. -
Page 3: Step 2 - Refrigerant Piping
WARNING STEP 2 – REFRIGERANT PIPING Refrigerant can be harmful if it is inhaled. Refrigerant IMPORTANT must be used and recovered responsibly. If this unit is being matched with an approved line set Failure to follow this warning may result in personal or indoor unit coil that was previously charged with injury or death. - Page 4 STEP 2 – REFRIGERANT PIPING – (Continued) TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE PROCEDURE (UNCASED COIL SHOWN) (UNCASED COIL SHOWN) STUB END TWO-PIECE PATCH PLATE LIQUID LINE CHECK DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING HOUSING VALVE...
- Page 5 STEP 2 – REFRIGERANT PIPING – Brazing Procedures CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the vapor and liquid line service of the line.
- Page 6 WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the vapor valve stem port.
- Page 7 This outdoor unit is designed for use in systems that include an expansion valve metering device (purchased separately) at the indoor coil. See the ML14XP1 specifications for approved expansion valve kit match-ups and application infor- mation. The check expansion valve unit can be installed internal or external to the indoor coil. In applications where an uncased coil is being installed in a field-provided plenum, install the check/expansion valve in a manner that will provide access for future field service of the expansion valve.
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Page 8: Step 3 - Leak Test And Evacuation
STEP 3 – LEAK TEST AND EVACUATION LEAK TEST HIGH MANIFOLD GAUGE SET OUTDOOR UNIT TO VAPOR SERVICE VALVE NOTE - Position canister to deliver liquid refrigerant. NITROGEN HFC-410A CONNECT GAUGE SET A - Connect the high pressure hose of an HFC-410A manifold gauge set to the vapor valve service port. NOTE - Normally, the high pressure hose is connected to the liquid line port. - Page 9 EVACUATION HIGH CONNECT GAUGE SET NOTE - Remove cores from service valves (if not already done). A - Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve B - Connect high side of manifold gauge set to OUTDOOR MANIFOLD liquid line service valve...
- Page 10 WARNING STEP 4 – ELECTRICAL – Circuit Sizing and Wire Routing Fire Hazard. Use of aluminum wire with this product may result in a fire, causing property damage, severe injury In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC).
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Page 11: Typical Control Wiring
STEP 4 – ELECTRICAL – (Continued) – High Voltage and Field Control Wiring The following illustration provides an example of control wiring connections when using a standard thermostat. ROUTING HIGH VOLTAGE, GROUND AND CONTROL WIRING HIGH VOLTAGE / GROUND WIRES Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. - Page 12 Torque Requirements OPERATING ANGLE-TYPE SERVICE VALVE When servicing or repairing heating, ventilating and air 1 - Remove stem cap with an appropriately sized wrench. conditioning components, ensure the fasteners are appro- priately tightened. Table 2 lists torque values for fasteners. 2 - Use a service wrench with a hex-head extension (3/16"...
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Page 13: Checking Refrigerant Charge
Detailed information jumper is installed. (Factory default is jumper installed.) is given in the ML14XP1 Installation and Service Proce- NOTE - The 30-second compressor feature is ignored dures manual. -
Page 14: Homeowners Information
thermostat demand. To reset a 5-strike pressure switch IMPORTANT lockout, cycle 24V control power to the defrost control or place the defrost control in the “TEST” mode by shorting After testing has been completed, properly reposition the “TEST” pins for 2 seconds. test jumper across desired timing pins Homeowners Information Service Light Connection... -
Page 15: Professional Maintenance
• Check the indoor unit drain line for obstructions month- Professional Maintenance ly. The indoor coil is equipped with a drain pan to collect condensate formed as your system removes humidity NOTICE ! from the inside air. Have your dealer show you the loca- Failure to follow instructions will cause damage to tion of the drain line and how to check for obstructions. -
Page 16: Start Up Checks
2 - Verify that system total static pressure and airflow 8 - Check for bearing/bushing wear on indoor blower settings are within specific operating parameters. motor. Replace as necessary. 3 - Verify correct temperature drop across indoor coil. ML14XP1 Start-Up and Performance Checklist Customer Address Indoor Unit Model Serial...
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