Goodman ASH Series, Инструкция по эксплуатации

Страница: 75 / 253

PRODUCT DESIGN
4
The GSH101203 units are shipped with a nitrogen holding
charge only and are available in 208/230v 3-phase.
The starting charge for the 10 ton unit should be 15 lbs. of R-
22. The length of line set, indoor unit airflow, condensing unit
location and number of tubing fittings will have an impact on
final unit charge amount. Turn the electrical power on, and let
the system run. Wait for the refrigerant pressures to stabilize.
At stabilized cooling conditions and with an outdoor
temperature of 60°F or higher, the system should have from
9°F to 13°F subcooling.
These units are designed for free air discharge. Air is drawn
through the outdoor coil by a propeller fan, and is discharged
vertically out the top of the unit. No additional restriction
(ductwork) shall be applied.
All units come equipped with suction and liquid valves
designed for connection to refrigerant-type copper. Non-back
seating valves are factory installed to accept the field run
copper.
Systems should be properly sized by heat gain and loss
calculations made according to methods of the Air Condi-
tioning Contractors Association (ACCA) or equivalent. It is
the contractors responsibility to ensure the system has ad-
equate capacity to heat or cool the conditioned space.
Some GSH10 heat pump units use Copeland Compliant
®
Scroll compressors. There are a number of design charac-
teristics which are different from the scroll compared to the
traditional reciprocating compressor.
Due to their design, Scroll compressors are inherently more
tolerant of liquid refrigerant.
Note: Even though the compressor section of a Scroll com-
pressor is more tolerant of liquid refrigerant, continued
floodback or flooded start conditions may wash oil from the
bearing surfaces causing premature bearing failure.
These Scroll compressors use white oil which is compatible
with 3GS. 3GS oil may be used if additional oil is required.
GSH10 model heat pumps do not use a reversing relay to
energize the reversing valve. The reversing valve is energized
in the cooling cycle through the "O" terminal on the room
thermostat.
This unit is for outdoor installation only. Refer to minimum
figure for clearances from the sides of the unit to full walls
and other objects.
NOTE: This unit cannot be completely enclosed. At least
one side must be unrestricted.
These clearances will help avoid air recirculation. If installing
two or more units at the same location, allow at least 24
inches between units. If only one side is restricted (for ex-
ample, against the outside wall of a house), the unit may be
placed as close as 8" to that one wall.
OK!
OK!
AA AA A
A
C C
C
C
OK!
OK!
OK!
OK!
NOT
RECOMMENDED
AA
AA
AA
AA
AA
B B B
B
Model Type A B C AA
Light Commercial
12" 12" 18" 24"
Minimum Airflow Clearances
Special consideration must be given to location of the
condensing unit(s) in regard to structures, obstructions,
other units, and any/all other factors that may interfere with
air circulation. Where possible, the top of the unit should be
completely unobstructed; however, if vertical conditions require
placement beneath an obstruction
there should be a
minimum of 60 inches between the top of the unit and
the obstruction(s).
The specified dimensions meet
requirements for air circulation only. Consult all appropriate
regulatory codes prior to determining final clearances.
Another important consideration in selecting a location for
the unit(s) is the angle to obstructions. Either side adjacent
the valves can be placed toward the structure provided the
side away from the structure maintains minimum service
clearance.
Corner installations are strongly discouraged.
DO
NOT
locate the unit:
* Directly under a vent termination for a gas appliance.
* Within 3 feet of a clothes drier vent
* Where the refreezing of defrost water would create
a hazard
* Where water may rise into the unit.