Typical 2-Stage Conventional Field Wiring - Ac; Electrical Connections; R-410A Saturation Properties; General - York 19 SEER Installation Manual

5390862-UIM-A-0318
TOTAL SYSTEM CHARGE DETERMINED
1. Determine outdoor unit factory charge from Tabular Data Sheet.
2. Determine indoor coil adjustment (if any) from Tabular Data Sheet.
3. Calculate the additional charge for refrigerant piping using the Tab-
ular Data Sheet if line length is greater than 15 feet (4.6 m).
4. Total system charge = item 1 + item 2 + item 3.
5. Permanently mark the unit data plate with the total amount of refrig-
erant in the system.
6. Permanently mark the unit data plate with the total amount of refrig-
erant in the system.
WARNING
!
DO NOT attempt to pump "Total System Charge" into outdoor unit for
maintenance or service. This may cause damage to the compressor
and/or other components. Recover and weigh "System Charge" into
an appropriate recovery cylinder for any instances requiring evacua-
tion.
CAUTION
!
IT IS UNLAWFUL TO KNOWINGLY VENT, RELEASE OR DIS-
CHARGE REFRIGERANT INTO THE OPEN AIR DURING REPAIR,
SERVICE, MAINTENANCE OR THE FINAL DISPOSAL OF THIS
UNIT.
CHARGING WITH GAUGES
CAUTION
!
Refrigerant charging should only be carried out by a qualified air con-
ditioning contractor.
All units include a charging chart document for AC cooling only. If a
charging chart is not on the unit, then it can be obtained at
www.upgnet.com under the Service Application Data section.
CAUTION
!
Compressor damage will occur if system is improperly charged. On
new system installations, charge system per tabular data sheet for
the matched coil and follow guidelines in this instruction.
Unit may be charged in cooling mode using the information at
www.upgnet.com under the Service Application Data section.
Before using gauges, confirm that the gauges are accurate by
comparing the gauges against a calibrated pressure gauge that
has been calibrated against a national standard. If a calibrated
pressure gauge is not available, place a R-410A virgin refrigerant
container in a conditioned space long enough to come to tempera-
ture equilibrium with the surroundings. Then measure the tem-
perature of the air and the pressure of the refrigerant and compare
it to the following table:
:
TABLE 3: R-410A Saturation Properties
Temp Pressure Temp
(°F) (Psig) (°F)
40 119 75
45 130 80
50 143 85
55 156 90
60 170 95
65 185 100
70 201 105
Before measuring the pressures, use the method above to check the air
flow and then consult the table and match the liquid pressure to that air
flow.
10
Pressure Temp Pressure
(Psig) (°F) (Psig)
218 110 365
236 115 391
255 120 418
274 125 447
295 130 477
317 – –
341 – –
SECTION VII: ELECTRICAL
CONNECTIONS
GENERAL INFORMATION & GROUNDING
Check the electrical supply to be sure that it meets the values specified
on the unit nameplate and wiring label.
Power wiring, control (low voltage) wiring, disconnect switches and over
current protection must be supplied by the installer. Wire size should be
sized per NEC requirements.
For servicing of the equipment the control box can slide down and
swing open. Considerations for running the electrical supply and power
control wiring should be made to utilize this swing open feature for
future service work. You will not need to drop/swing the box open for
installation of the electrical supply and power wiring, just account for the
motion the box will have in the wire routing.
NOTICE
Flexible electrical wiring must be installed in order to use the swing
away function of the control box. Rigid type electrical connections
require the wiring to be disconnected in order to swing the control
box open.
CAUTION
!
All field wiring must USE COPPER CONDUCTORS ONLY and be in
accordance with Local, National, Fire, Safety & Electrical Codes. This
unit must be grounded with a separate ground wire in accordance
with the above codes.
The complete connection diagram and schematic wiring label is located
on the inside surface of the unit service access panel. An example of
typical field connections can be found in Figures 12 & 22.
FIGURE 11: Outdoor Unit Control Box
Johnson Controls Unitary Products