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**WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER**
Altering the product or replacing parts with non authorized factory parts voids all warranty or implied war-
ranty and may result in adverse operational performance and/or a possible hazardous safety condition to
service personnel and occupants. Company employees and/or contractors are not authorized to waive this
warning. Current Maintenance Program is available at www.fi rstco.com under "Product Information".
NOTE: Read the entire installation instruction manual before starting the installation.
Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fi re, electrical shock, or other condi-
tions which may cause personal injury or property damage. Consult a qualifi ed licensed installer, service agency, or your distributor
for information or assistance. The qualifi ed licensed installer or service agency must use factory-authorized kits or accessories when
modifying this product. Refer to the individual instructions packaged with kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fi re extinguisher
available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes
and National Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety-alert symbol
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-alert symbol.
DANGER identifi es the most serious hazards which will result in severe personal injury or death. WARNING signifi es hazards which
could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or
product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or opera-
tion.
The manufacturer assumes no responsibility for equipment installed in violation of any code requirement. The information present-
ed here has been prepared to assist in the proper installation of the air conditioning system. Improper installation can result in unsatis-
factory operation and/or dangerous conditions, and can cause the related warranty to be voided.
Read these instructions and any instructions packaged with separate equipment required to make up the system prior to installation.
Material in this shipment has been inspected at the factory and released to the transportation agency in good condition. When
received, a visual inspection of all cartons should be made immediately. Any evidence of rough handling or apparent damage should
be noted on the delivery receipt and the material inspected in the presence of the carrier's representative. If damage is found, a claim
should be fi led against the carrier immediately.
WMHP / WHHP Series
R410a Heat Pump
INSTALLATION INSTRUCTIONS
SAFETY CONSIDERATIONS
GENERAL
. When you see this symbol on the unit and in instructions
L2589 6/15
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Table of Contents
Related Manuals for First Co WMHP Series
Summary of Contents for First Co WMHP Series
- Page 1 WMHP / WHHP Series R410a Heat Pump INSTALLATION INSTRUCTIONS **WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER** Altering the product or replacing parts with non authorized factory parts voids all warranty or implied war- ranty and may result in adverse operational performance and/or a possible hazardous safety condition to service personnel and occupants.
- Page 2 WARNING: Before installing or servicing unit, always turn off all power to unit. There may be more than one disconnect switch. Electrical shock can cause personal injury or death. INSTALLATION PRECAUTIONS Installation of this equipment should only be performed by properly trained personnel to ensure proper installation and the safety of the installer.
- Page 3 In cold climate areas, units installed in interior and return air spaces may require that insulation be added to the exterior of the unit cabinet to reduce heat loss thru the cabinet and possible condensation on the cabinet surfaces which could result in water damage. The unit is equipped with a drain pan located beneath the coil to catch any condensate produced during the heating mode.
- Page 4 pumping until the 500 micron pressure can be maintained. Close the hand valves at the gauge manifold, remove the vacuum pump and open the service valves on the heat pump units. The refrigeration system should now be ready to operate. CHARGING WMHP heat pump units should be attached to evaporators which are fi...
- Page 5 3. Restart the unit in the heating mode, allowing frost to accumulate on the outdoor coil. 4. Place a screwdriver blade to short between the test terminals on the defrost control to speed up the timing sequence. 5. Immediately after the reversing valve changes position remove the screwdriver from the terminals to allow the unit to defrost the coil.
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