29
Refriger
ant
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 subcooling values provided in the Charging
Chart for outdoor dry bulbs corresponding to
conditions outside of the above range are provided
as reference ONLY.
2. Note the measured Liquid Pressure, Pliq =
______psig, as measured from the liquid (small)
service valve. Use the Temperature Pressure
Chart below to note the corresponding saturation
temperature for R-410A at the measured liquid
pressure.
Liquid Saturation Temperature, SAT°= _____°F
[_____°C].
3. Note the liquid line temperature, Liq° = _____°F
[_____°C], as measured from a temperature
probe located within 6" [15.2 cm] outside of
the unit on the copper liquid line (small line).
It is recommended to use a calibrated clamp-
on temperature probe or an insulated surface
thermocouple.
4. Subtract the liquid line temperature from the
saturation temperature to calculate subcooling.
SAT°_____°F [_____°C] - Liq°_____°F [_____°C]
= SC°_____°F [_____°C]
5. Adjust charge to obtain the specified subcooling
value. If the measured subcool is below the listed
requirement for the given outdoor and indoor
conditions, add charge. If the measured subcool
is above the listed requirement for the given
outdoor and indoor conditions, remove charge.
Finishing Up Installation
• Disconnect pressure gauges from pressure ports;
then replace the pressure port caps and tighten
adequately to seal caps.
Do not overtighten.
• Replace the service valve caps finger-tight and
then tighten with an open-end wrench adequately
to seal caps.
Do not overtighten.
• Replace control box cover and service panel and
install screws to secure service panel.
• Restore power to unit at disconnect if required.
• Configure indoor thermostat per the thermostat
installation instructions and set thermostat to
desired mode and temperature.
NOTICE:
Systems should not be fine-tune
charged below 40°F [4.4°C] outdoor dry bulb.
IMPORTANT:
Excessive use of
elbows in the refrigerant line set can produce
excessive pressure drop. Follow industry
best practices for installation. Installation
and commissioning of this equipment is to
be performed by trained and qualified HVAC
professionals. For technical assistance, contact
your Distributor Service Coordinator.
TEMPERATURE PRESSURE CHART
SATURATION
TEMP
(Deg. F)
[Deg. C]
R-410A
PSIG
SATURATION
TEMP
(Deg. F)
[Deg. C]
R-410A
PSIG
SATURATION
TEMP
(Deg. F)
[Deg. C]
R-410A
PSIG
SATURATION
TEMP
(Deg. F)
[Deg. C]
R-410A
PSIG
-150 [-101]
–
-30 [-34]
17.9
35 [2]
107.5
100 [38]
317.4
-140 [-96]
–
-25 [-32]
22.0
40 [4]
118.5
105 [41]
340.6
-130 [-90]
–
-20 [-29]
26.4
45 [7]
130.2
110 [43]
365.1
-120 [-84]
–
-15 [-26]
31.3
50 [10]
142.7
115 [46]
390.9
-110 [-79]
–
-10 [-23]
36.5
55 [13]
156.0
120 [49]
418.0
-100 [-73]
–
-5 [-21]
42.2
60 [16]
170.1
125 [52]
446.5
-90 [-68]
–
0 [-18]
48.4
65 [18]
185.1
130 [54]
476.5
-80 [-62]
–
5 [-15]
55.1
70 [21]
201.0
135 [57]
508.0
-70 [-57]
–
10 [-12]
62.4
75 [24]
217.8
140 [60]
541.2
-60 [-51]
0.4
15 [-9]
70.2
80 [27]
235.6
145 [63]
576.0
-50 [-46]
5.1
20 [-7]
78.5
85 [29]
254.5
150 [66]
612.8
-40 [-40]
10.9
25 [-4]
87.5
90 [32]
274.3
-35 [-37]
14.2
30 [-1]
97.2
95 [35]
295.3
START-UP
Checking Refrigerant Charge (cont.)
