6
Section 6.
Applications
VERTICAL UPFLOW
1. Vertical Upflow configuration is the
factory set on all models.
2. If a side return air opening is required,
field fabricate a return air plenum with an
opening large enough to supply unit and
strong enough to support unit weight.
3. If return air is to be ducted, install duct
flush with floor. Use fireproof resilient
gasket 1/8 to 1/4 in. thick between the
ducts, unit and floor. Set unit on floor over
opening.
IMPORTANT NOTE
Torque applied to drain connections should
not exceed 15.ft.lbs.
Section 7. Electrical Wiring
Field wiring must comply with the National Electric Code and any applicable local ordinance.
！
WARNING
Disconnect all power to unit before installing or servicing. More than one disconnect switch may be required to de-energize the equipment.
Hazard-ous voltage can cause severe personal injury or death.
POWER WIRING
It is important that proper electrical power is available for connection to the unit model being installed. See the unit
nameplate, wiring diagram and electrical data in the installation instructions.
* If required, install a branch circuit disconnect of adequate size, located within sight of, and readily accessible to the unit.
* IMPORTANT: After the Electric Heater is installed, units may be equipped with one, two, or three 30/60 amp. circuit
breakers. These breaker(s) protect the internal wiring in the event of a short circuit and serve as a disconnect. Circuit
breakers installed within the unit do not provide over-current protection of the supply wiring and therefore may be sized
larger than the branch circuit protection.
* Supply circuit power wiring must be 75°C minimum copper conductors only. See Electrical Data In this section for
ampacity, wire size and circuit protector requirement. Supply circuit protective devices may be either fuses or "HACR" type
circuit breakers.
* Power wiring may be connected to either the right, left side or top. concentric knockouts are provided for connection of
power wiring to unit.
* Power wiring is connected to the power terminal block in unit electric cabinet.
CONTROL WIRING
IMPORTANT: Class 2 low voltage control wiring should not be run in conduit with main power wiring and must be
separated from power wiring, unless class 1 wire of proper voltage rating is used.
* Low voltage control wiring should be 18 Awg. color-coded. For lengths longer than 100 ft., 16 Awg. wire should be us
* See wiring diagrams attached to indoor and outdoor sections to be connected.
* Make sure, after installation, separation of control wiring and power wiring has been maintained.
GROUNDING
！
WARNING
The unit must be permanently grounded. FaIlure to do so can result In electrical shock causing personal injury or death.
* Grounding may be accomplished by grounding metal conduit when installed in accord ance with electrical codes to the
unit cabinet.
* Grounding may also be accomplished by attaching ground wire(s) to ground lug(s) provided in the unit wiring
compartment.
* Ground lug(s) are located close to wire entrance on left side of unit (up-flow). Lug(s) may be moved to marked locations
near wire entrance on right side of unit (upflow). If alternate location is more convenient.
* Use of multiple supply circuits require grounding of each circuit to lug(s) provided in unit.
