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PRODUCT DESIGN
5
UNIT LOCATION
T
O
PREVENT
POSSIBLE
EQUIPMENT
DAMAGE
,
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
,
THE
FOLLOWING
BULLET
POINTS
MUST
BE
OBSERVED
WHEN
INSTALLING
THE
UNIT
.
WARNING
All Installations:
Important Note:
If unit is equipped with crankcase
heater unit should be energized 24 hours prior to com-
pressor start up to ensure crankcase heater has suffi
-
ciently warmed the compressors. Compressor damage
may occur if this step is not followed.
NOTE:
This appliance is a dedicated downflow design.
Proper installation of the unit ensures trouble-free operation.
Improper installation can result in problems ranging from noisy
operation to property or equipment damages, dangerous con-
ditions that could result in injury or personal property damage
and that are not covered by the warranty. Give this booklet to
the user and explain it’s provisions. The user should retain
these instructions for future reference.
•
For proper flame pattern within the heat exchanger and
proper condensate drainage, the unit must be mounted
level.
•
The flue outlet must be at least 12 inches from any opening
through which flue gases could enter a building, and at
least three feet above any forced air inlet located within
ten feet. The economizer/manual fresh air intake/motorized
fresh air intake and combustion air inlet mounted on the
unit are not affected by this restriction.
•
Do not locate the unit in an area where the outdoor air (i.e.
combustion air for the unit) will be frequently contaminated
by compounds containing chlorine or fluorine. Common
sources of such compounds include swimming pool chem-
icals and chlorine bleaches, paint stripper, adhesives,
paints, varnishes, sealers, waxes (which are not yet dried)
and solvents used during construction and remodeling.
Various commercial and industrial processes may also
be sources of chlorine/fluorine compounds.
•
To avoid possible illness or death of the building occupants,
do NOT locate outside air intake device (economizer, man-
ual fresh air intake, motorized fresh air intake) too close
to an exhaust outlet, gas vent termination, or plumbing
vent outlet. For specific distances required, consult local
codes.
•
Allow minimum clearances from the enclosure for fire
protection, proper operation, and service access (see
unit clearances). These clearances must be permanently
maintained.
•
The combustion air inlet and flue outlet on the unit must
never be obstructed. If used, do not allow the economizer/
manual fresh air damper/ motorized fresh air damper to
become blocked by snow or debris. In some climates or
locations, it may be necessary to elevate the unit to avoid
these problems.
•
When the unit is heating, the temperature of the return
air entering the unit must be between 50° F and 100° F.
Ground Level Installations Only:
•
When the unit is installed on the ground adjacent to the
building, a level concrete (or equal) base is recommended.
Prepare a base that is 3” larger than the package unit
footprint and a minimum of 3” thick.
•
The base should also be located where no runoff of water
from higher ground can collect in the unit.
Roof top Installations Only:
•
To avoid possible property damage or personal injury, the
roof must have sufficient structural strength to carry the
weight of the unit(s) and snow or water loads as required
by local codes. Consult a structural engineer to determine
the weight capabilities of the roof.
•
The unit may be installed directly on wood floors or on
Class A, Class B, or Class C roof covering material.
•
To avoid possible personal injury, a safe, flat surface for
service personnel should be provided.
•
As indicated on the unit data plate, a minimum clearance
of 36” to any combustible material is required on the fur-
nace access side of the unit. All combustible materials
must be kept out of this area.
•
This 36” clearance must also be maintained to insure
proper combustion air and flue gas flow. The combustion
air intake and furnace flue discharge must not be blocked
for any reason, including blockage by snow.
•
Adequate clearances from the furnace flue discharge to
any adjacent public walkways, adjacent buildings, build-
ing openings or openable windows must be maintained
in accordance with the latest edition of the National Fuel
Gas Code (ANSI Z223.1)
•
Minimum horizontal clearance of 48” from the furnace flue
discharge to any electric meters, gas meters, regulators
and relief equipment is required.
Unit Precautions
•
Do not stand or walk on the unit.
• Do not drill holes anywhere in panels or in the base
frame of the unit(except where indicated). Unit access
panels provide structural support.
•
Do not remove any access panels until unit has been
installed on roof curb or field supplied structure.
•
Do not roll unit across finished roof without prior approval
of owner or architect.
• Do not skid or slide on any surface as this may dam-
age unit base. The unit must be stored on a flat, level
surface. Protect the condenser coil because it is easily
damaged.
Summary of Contents for DBG Series
Page 51: ...51 ACCESSORIES GAS ELECTRIC...
Page 52: ...ACCESSORIES 52 GAS ELECTRIC...
Page 53: ...53 ACCESSORIES...
Page 54: ...ACCESSORIES 54...
Page 95: ...95 DBC COMMERCIAL 15 25 Ton Packaged Air Conditioner Unit WIRING DIAGRAMS...
Page 100: ...100 DBG COMMERCIAL 15 25 Ton Packaged Gas Electric Unit WIRING DIAGRAMS...