5121495-UIM-D-0516
Johnson Controls Unitary Products
7
CHARGING THE UNIT
The factory charge in the outdoor unit includes enough charge for the
unit, 15 ft. (4.6 m) of refrigerant piping, and the smallest indoor coil/air
handler match-up. Some indoor coil/air handler matches may require
additional charge.
See Tabular Data Sheet provided in unit Customer Booklet for charge
requirements. The "TOTAL SYSTEM CHARGE" must be permanently
marked on the unit data plate.
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 Tabu-
lar 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.
If a device is placed in the inner-connecting lines, such as a drier, muf-
fler, or liquid line flow meter, do not weigh in the charge. Instead, follow
the directions in the “Charging with gauges section.”
CHARGING WITH GAUGES
All units include a cooling charging chart for cooling and may include a
heating charging chart. If a charging chart is not on the unit, then it can
be obtained at
www.upgnet.com
under the Service Application Data
section.
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 your 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:
:
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.
SECTION VII: ELECTRICAL
CONNECTIONS
GENERAL INFORMATION & GROUNDING
The control box cover is held in place with 3 screws (one screw in each
lower corner and one screw at the top center post). The control box can
swing open by removing the screw from the center of each side of the
control box and allowing the control box to lower an inch or so into a
pivotal position.
The control box can then swing open from the left by rotating on the
right side pivots for easy service of refrigeration components. If no wir-
ing is in or routed through the control box, it can be removed from the
unit by lifting slightly, tilting the top hinge out, and lifting the bottom
hinge out. During the installation, it is recommended to route the low
voltage wiring for the thermostat along the unit whip to help facilitate the
swing away feature of the control box. Refer to Figure 8.
CAUTION
R-410A refrigerant cylinders are rose colored, and have a dip tube
which allows liquid to flow out of the cylinder in the Upright Position.
Always charge the system slowly with the tank in the upright position.
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.
CAUTION
Do not leave the system open to the atmosphere. Unit damage could
occur due to moisture being absorbed by the POE oil in the system.
This type of oil is highly susceptible to moisture absorption.
WARNING
DO NOT attempt to pump “Total System Charge” into outdoor unit for
maintenance, service, etc. This may cause damage to the compres-
sor and/or other components. The outdoor unit only has enough vol-
ume for the factory charge, not the “Total System Charge”.
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.
CAUTION
Refrigerant charging should only be carried out by a qualified air con-
ditioning contractor.
!
!
!
!
!
!
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.
TABLE 2:
R-410A Saturation Properties
Temp
(°F)
Pressure
(Psig)
Temp
(°F)
Pressure
(Psig)
Temp
(°F)
Pressure
(Psig)
40
119
75
218
110
365
45
130
80
236
115
391
50
143
85
255
120
418
55
156
90
274
125
447
60
170
95
295
130
477
65
185
100
317
–
–
70
201
105
341
–
–
NOTICE
A flexible electrical whip must be installed in order to use the swing
away function of the control box. Other type electrical whips require
the wiring to be disconnected in order to swing the control box
open.
!
