York E3GE036S01B, Руководство по установке

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10. Release refrigerant charge into the system. Open both the
liquid and vapor fittings by removing the plunger cap and fully
insert a hex wrench into the stem and back out counterclock-
wise until valve stem just touches retaining ring.
Replace plunger cap finger tight, then tighten an additional 1/12
turn (1/2 hex flat). Cap must be replaced to prevent leaks.
11. The outdoor unit contains enough refrigerant charge for a
matched 3-ton indoor coil and 15 feet of 5/16" & 3/4" tubing.
If additional unit charge is required, refer to the guidelines in
Refrigerant System Charge section.
EVACUATION
It will be necessary to evacuate the refrigerant system if the unit
developed a leak during shipment or was, for any reason,
opened to the atmosphere. If a leak is suspected, leak test to
locate the leak. Repair the leak and test again.
To verify that the system has no leaks, simply close the valve
to the vacuum pump suction to isolate the pump and hold the
system under vacuum. Watch the micron gauge for a few
minutes. If the micron gauge indicates a steady and continuous
rise, it’s an indication of a leak. If the gauge shows a rise, then
levels off after a few minutes and remains fairly constant, its an
indication that the system is leak free but still contains moisture
and may require further evacuation if the reading is above 500
microns.
REFRIGERANT SYSTEM CHARGE
The factory charge in the outdoor unit includes enough charge
for the unit and matched 3-ton indoor coil along with 15 feet of
5/16" & 3/4" lines. Installations over 15 feet (maximum 125 ft.)
or 3-1/2 ton systems will require some additional charge. Refer
to Table 4 below.
GLYCOL COOLANT CHARGE
AND AIR PURGING PROCEDURE
Refer to the parts list to order any additional coolant required.
The outdoor unit is shipped with a factory charge of 3 gallons
of coolant. This is sufficient for proper system operation. Should
coolant need to be added to the outdoor unit in the field, refer
to the following procedure for adding coolant and purging air
from the system.
To charge the glycol system, use a garden type bug sprayer
pressure tank equipped with a pressure gauge and a refrigerant
style charging line with a shutoff valve as shown in Fig.12. Refer
to Step 2 (below) for connections.
FIGURE 11 - OUTDOOR UNIT SHUT-OFF VALVE
Liquid Line OD Vapor Line OD R22 Charge (oz./ft).
5/16 3/4 0.46
3/8 7/8 0.70
TABLE 4 - ADDITIONAL REFRIGERANT
LINE
CHARGE
CAUTION: Do not connect manifold gauges unless
trouble is suspected. Approximately 3/4 ounce of refrig-
erant will be lost each time a standard manifold gauge
is connected.
WARNING: Never attempt to repair any brazed connec-
tions while the system is under pressure. Personal
injury could result.
WARNING: This is not a backseating valve. The service
access port has valve core. Opening or closing valve
does not close service access port.
CAUTION: If visual verification of the valve stem reach-
ing the retaining ring is impossible, stop backing out the
valve stem when the slightest increase in resistance is
felt. Because of the small size and therefore the reduced
resistance, back out the liquid valve 5 turns maximum
to prevent going past the retaining ring.
WARNING: If the valve stem is backed out past the
retaining ring, the O-ring can be damaged, causing
leakage or system pressure could force the valve stem
out of the valve body possibly causing personal injury.
In the event the retaining ring is missing, do not attempt
to open the valve.
WARNING: The coolant used in this unit contains ethyl-
ene glycol which, like automotive anti-freeze, can be toxic
to humans and animals. It is pink in color and has a
pungent odor. Avoid skin or eye contact. Do not ingest.
CAUTION: Use of substitutes will void the warranty. DO
NOT use automotive type anti-freeze solutions or water
as a coolant in this unit. Automotive anti-freeze contains
chemicals that will coat the internal parts of the system
causing damage. DO NOT USE SUBSTITUTES!
CAUTION: Coolant system is pressurized at approxi-
mately 7 psig and operating temperatures reach 210
°
F.
Use caution when opening purge valves or filler tank
cap.
NOTE: The outdoor unit is charged with sufficient gly-
col. The overflow tank should contain glycol to the "cold"
mark on the tank.
SPRAYER
0-15 PSIG
SHUT OFF
VALVE
ATTACH TO SCHRADER FITTING
ON GLYCOL COIL, OR GLYCOL
FILTER/STRAINER. (See air
purging procedure)
FIGURE 12 - GLYCOL CHARGING TANK USED TO
ADD
COOLANT
NOTE: For a 3-1/2 ton system, you must add an addi-
tional 12 oz. of R22 charge. This additional charge is for
the larger indoor coil and 15’ of 3/8" & 7/8" tubing.
515.35-N6Y
Unitary Products Group 7