8
rEFrIGErant charGInG & unIt start uP
WarnInG:
ElEctrIcal shocK or FIrE hazarD
Failure to follow safety warnings exactly could result
in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property damage.
• Before servicing, disconnect all electrical power
to the unit.
• When servicing controls, label all wires prior to
disconnecting. reconnect wires correctly.
• Verify proper operation after servicing.
WarnInG:
the geothermal heat pump leaves the factory with
a nitrogen holding charge. Follow all charging
instructions for maximum unit performance and
efficiency. only charge the unit with the refrigerant
listed on the unit rating plate. some local codes
require licensed installation/service personnel to
service this type of equipment. refrigerant charging
must be done by qualified personnel familiar with
safe and environmentally responsible refrigerant
handling procedures. under no circumstances
should the owner attempt to install and/or service
this equipment. Failure to comply with this warning
could result in property damage, personal injury, or
death.
cautIon:
this unit uses r-410a refrigerant. Do not use
any other refrigerant in this unit. use of another
refrigerant may damage the unit.
cautIon:
this unit uses r-410a refrigerant with PoE oil. When
servicing, cover or seal openings to minimize the
exposure of the refrigerant system to air to prevent
accumulation of moisture and other contaminants.
• After refrigerant line connections are completed, it is required
that you leak check and evacuate the indoor section and all
line connections (using proper methods) before finalizing
the full system refrigerant charge. For final charges based
on matched systems and specified line lengths, see
.
• Pressure test the entire system at 400 psig with dry nitrogen
prior to pulling a vacuum and charging.
• Prior to charging the system with refrigerant, make sure
that a vacuum pump has been used to fully evacuate the
system to at least 250 microns.
table 3. thermostat Wire Gauge
thErMostat
WIrE GauGE
MaXIMuM rEcoMMEnDED
thErMostat WIrE lEnGth (Ft)
24
25
22
45
20
70
18
110
• Where local codes require that the thermostat wiring must
be routed through a conduit or raceway, splices can be
made inside the unit; however, all wiring must be NEC
Class 1 and must be separated from incoming power leads.
Recommended low voltage wire gauges and wire lengths
.
• The thermostat should be mounted about 5 feet above the
floor on an inside wall. DO NOT install the thermostat on
an outside wall or any other location where its operation
may be adversely affected by radiant heat from fireplaces,
sunlight, or lighting fixtures, and convective heat from warm
air registers or electrical appliances. Refer to the thermostat
manufacturer’s instruction sheet for detailed mounting and
installation information.
compressor Electrical
WarnInG:
turn the compressor unit oFF during installation
or servicing. also turn oFF supplemental (backup)
heater power and/or fuel supply source (if applicable).
Failure to follow this safety warning exactly could
result in serious personal injury or death.
