Rheem P16 Series Installation Instructions Manual page 37

FINAL CHARGE BY SUB-
COOLING
Step 1. After gross charging note the designed Sub-Cool
value. The correct sub-cooling value is found at
the intersection of the Installed system and the
outdoor ambient temperature on the Charging
Chart located on the inside of the control box
cover of the outdoor unit.
SC° from Charging Chart = _________°F.
IMPORTANT:
sured at the indoor coil are required to be between 70°F
and 80°F dry bulb for fi ne tune unit charge adjustment.
Unit charging is recommended under the following out-
door conditions ONLY:
Cooling Mode ONLY: 55°F outdoor dry bulb and
above
Heating Mode ONLY: Between 40°F and 60°F
outdoor dry bulb
NOTICE:
If the Indoor temperature is above or
below the recommended range, run the system to bring
the temperature down or run the electric heat/furnace
to bring the temperature up. System sub-cooling values
provided in the Charge Chart for outdoor dry bulbs cor-
responding to conditions outside of the above range, are
provided as reference ONLY.
Step 2. Note the measured Liquid Pressure, Pliq =
______psig, as measured from the liquid (small)
service valve. Use the pressure temperature
chart below to note the corresponding saturation
temperature for R410A at the measured liquid
pressure.
Liquid Saturation Temperature, SAT°F=
_________°F.
Step 3. Note the liquid line temperature, Liq° =
__________°F, as measured from a temperature
probe located within 6" outside of the unit on the
SATURATION
TEMP
(Deg. F)
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-35
EVACUATION AND LEAK TESTING
Indoor conditions as mea-
R-410A SATURATION R-410A
PSIG TEMP
(Deg. F)
- -30
- -25
- -20
- -15
- -10
- -5
- 0
- 5
- 10
0.4 15
5.1 20
10.9 25
14.2 30
copper liquid line (small line). It is recommended
to use a calibrated clamp on temperature probe
or an insulated surface thermocouple.
Step 4. Subtract the liquid line temperature (Step 3) from
the saturation temperature (Step 2) to calculate
Sub-Cooling. SAT°F______ - Liq°______ =
SC°_______
Step 5. Adjust Charge to obtain the specifi ed sub-
cooling value. If the measured sub-cool is below
the listed requirement for the given outdoor and
indoor conditions, add charge. If the measured
sub-cool is above the listed requirement for the
given outdoor and indoor conditions remove
charge.
NOTICE:
charged below 40°F outdoor dry bulb.
IMPORTANT:
in the refrigerant line set can produce excessive pres-
sure drop. Follow industry best practices for installation.
Installation and commissioning of this equipment is to be
preformed by trained and qualifi ed HVAC professionals.
For technical assistance contact your Distributor Service
Coordinator.
FINISHING UP INSTALLATION
• Disconnect pressure gauges from pressure ports;
then replace the pressure port caps and tighten ad-
equately to seal caps. Do not over tighten.
• Replace the service valve caps fi ngertight and then
tighten with an open-end wrench adequately to seal
caps. Do not over tighten.
• Replace control box cover and service panel and
install screws to secure service panel.
• Restore power to unit at disconnect if required.
• Confi gure indoor thermostat per the thermostat instal-
lation instructions and set thermostat to desired mode
and temperature.
SATURATION R-410A
PSIG TEMP PSIG
(Deg. F)
17.9 35 107.5
22 40 118.5
26.4 45 130.2
31.3 50 142.7
36.5 55 156.0
42.2 60 170.1
48.4 65 185.1
55.1 70 201.0
62.4 75 217.8
70.2 80 235.6
78.5 85 254.5
87.5 90 274.3
97.2 95 295.3
Systems should not be fi ne tune
Excessive use of elbows
SATURATION R-410A
TEMP PSIG
(Deg. F)
100 317.4
105 340.6
110 365.1
115 390.9
120 418.0
125 446.5
130 476.5
135 508.0
140 541.2
145 576.0
150 612.8
37