2
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. consult local
building codes, the current editions of the National Fuel Gas Code
(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code
(NEC) NFPA 70.
In Canada refer to the current editions of the National Standards of
Canada CAN/CSA--B149.1 and .2 Natural Gas and Propane
Installation codes, and Canadian Electrical Code CSA C22.1
Recognize safety information. This is the safety--alert symbol
.
When you see this symbol on the unit and in instructions or manu-
als, be alert to the potential for personal injury. Understand these
signal words: DANGER, WARNING, and CAUTION. These
words are used with the safety--alert symbol. DANGER identifies
the most serious hazards which
will
result in severe personal injury
or death. WARNING signifies hazards which
could
result in per-
sonal injury or death. CAUTION is used to identify unsafe practic-
es which
may
result in minor personal injury or product and prop-
erty damage. NOTE is used to highlight suggestions which
will
result in enhanced installation, reliability, or operation.
Always install furnace to operate within the intended temperature
rise range with a duct system which has an external static pressure
within the allowable range, as specified in “Indoor Airflow Adjust-
ments” section of these instructions. See furnace rating plate.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, always turn off main
power to system and install lock out tag. There may be
more than one disconnect switch. Turn off accessory heater
power switch if applicable.
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal
injury or equipment damage.
Puron (R--410A) systems operate at higher pressures than
standard R--22 systems. DO NOT use R--22 service
equipment or components on Puron (R--410A) equipment.
Ensure service equipment is rated for Puron (R--410A).
WARNING
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
When removing access panels or performing maintenance
functions inside your unit, be aware of sharp sheet metal
parts and screws. Although special care is taken to reduce
sharp edges to a minimum, be extremely careful and wear
appropriate protective clothing, safety glasses and gloves
when handling parts or reaching into the unit.
CAUTION
!
INTRODUCTION
The 677D----A packaged HYBRID HEAT
R
unit is a fully
self--contained combination Category I gas heating/electric heat
pump designed for outdoor installation (See Fig. 1). Standard units
are shipped in a horizontal--discharge configuration for installation
on a rooftop, or on a cement slab (see Fig. 4 for roof curb
dimensions). Standard units can be converted to downflow
(vertical) discharge configurations for rooftop applications.
In gas heating mode, this unit is designed for a minimum
continuous return--air temperature of 55
_
F (13
_
C) db and a
maximum continuous return--air temperature of 80
_
F (27
_
C) db.
Failure to follow these return--air temperature limits may affect
reliability of heat exchangers, motors, and other components.
Models with an N in the thirteenth position of the model number
are dedicated Low NOx units designed for California installations.
These models meet the California maximum oxides of nitrogen
(NOx) emissions requirements of 40 nanograms/joule or less as
shipped from the factory and must be installed in California Air
Quality Management Districts or any other regions in North
America where a Low NOx rule exists.
NOTE
:
Low NOx requirements apply only to natural gas
installations.
RECEIVING AND INSTALLATION
Check Equipment
IDENTIFY UNIT
The unit model number and serial number are printed on the unit
informative plate. Check this information against shipping papers.
INSPECT SHIPMENT
Inspect for shipping damage before removing packaging material.
If unit appears to be damaged or is torn loose from its anchorage,
have it examined by transportation inspectors before removal.
Forward claim papers directly to transportation company.
Manufacturer is not responsible for any damage incurred in transit.
Check all items against shipping list. Immediately notify the
nearest distributor’s office if any item is missing. To prevent loss or
damage, leave all parts in original packages until installation.
If the unit is to be mounted on a curb in a downflow application,
review “Converting Horizontal Discharge Units to Downflow” to
determine which method is to be used to remove the downflow
panels before rigging and lifting into place. The panel removal
process may require the unit to be on the ground.
Provide Unit Support
For hurricane tie downs, contact distributor for details and PE
(Professional Engineering) Certificate, if required.
ROOF CURB
Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 4). Install insulation, cant strips, roofing, and
flashing. Ductwork must be attached to curb.
IMPORTANT
: The gasketing of the unit to the roof curb is
critical for a water tight seal. Install gasketing material supplied
with the roof curb. Improperly applied gasketing also can result in
air leaks and poor unit performance.
Curb should be level to within 1/4 in. (6.35 mm) (See Fig. 2). This
is necessary for unit drain to function properly. Refer to accessory
roof curb installation instructions for additional information as
required.
Installation on older “G” series roof curbs.
Two accessory kits are available to aid in installing a new “G”
series unit on an old “G” roof curb.
1. Accessory kit number CPADCURB001A00, (small chassis)
and accessory kit number CPADCURB002A00, (large
chassis) includes roof curb adapter and gaskets for the
perimeter seal and duct openings. No additional
modifications to the curb are required when using this kit.
2. An alternative to the adapter curb is to modify the existing
curb by removing the outer horizontal flange and use
accessory kit number CPGSKTKIT001A00 which includes
677D
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--
A
