5156631-UIM-G-0417
8
Johnson Controls Unitary Products
MEASURE INDOOR AIR FLOW
To determine rated air flow for a specific match, consult the technical lit-
erature at www.upgnet.com. When attempting to match this air flow,
select the lowest possible speed tap, measure the actual flow, and
adjust as necessary.
To measure actual air flow, it is not an acceptable method to just
check the jumper pin setting tables and to assume 0.5” static pres-
sure drop.
To determine indoor air flow, first measure the static pressure with a
manometer between the filter and blower. On a single-piece air handler,
take a second reading after the coil. On a furnace or modular air han-
dler, take the second reading after the heat exchanger, but before the
indoor coil. Add the negative return static to the positive supply static to
determine the system total static pressure. Treat the negative return
static as a positive pressure (even though it is a negative reading). If
there is static pressure on the blower (i.e. -.10) return, add it to a supply
static (.40) which equals a (.50) total system static pressure. Compare
this value to the table for the indoor unit's static pressure vs. CFM or to
a curve chart.
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.
6. When charging system, move the P6 TEST MODE jumper from the
normal “N” operating position to the high “H” position. After the sys-
tem is completely charged, move the P6 TEST MODE jumper from
the ‘H” position to the “N” position for normal operation. See Figure
10 for “H” and “N” jumper positions.
7. If a device is placed in the refrigerant lines, such as a drier, muffler,
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. If a charging chart
is not on the unit, then it can be obtained from
www.upgnet.com
.
Before using gauges, confirm that your gauges are accurate by com-
paring 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 condi-
tioned space long enough to come to temperature equilibrium with the
surroundings. Then measure the temperature of the air and the pres-
sure 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 with the proper amount of refrigerant.
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.
NOTICE
The P6 TEST MODE must be jumpered in the “H” position when
charging the system. Before the system is charged, it takes approxi-
mately 15 minutes of cooling operation for the refrigerant in the sys-
tem to stabilize. After charging is complete, the P6 TEST MODE must
be jumpered in the “N” position for normal operation of the system.
With the jumper in the “N” position, the compressor operates at 4th
stage and Y2 operates the indoor fan speed.
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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. Recover and weigh “System Charge”
into an appropriate recovery cylinder for any instances requiring
evacuation.
CAUTION
It is unlawful to knowingly vent, release or discharge 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 3:
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
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—
70
201
105
341
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