Ruud RD17AZ - Final Charging by Liquid Subcooling; Completing Installation

32
Start-Up
requirement for the given outdoor and indoor
conditions, add charge. If the measured liquid
pressure is above the listed requirement for the
given outdoor and indoor conditions, remove
charge.
5.8.4 Final Charging by Liquid
Subcooling
1. After preliminary charging by weight or pressures,
find the design subcooling value. The correct
subcooling value is found at the intersection of
the installed system and the outdoor ambient
temperature on the Charging Chart located inside
the access panel cover.
SC° from Charging Chart = _____°F [°C].
A liquid charge adapter must be used when
adding refrigerant to the unit.
IMPORTANT: Indoor conditions as
measured at the indoor coil are required to be
within 2ºF (1.1ºC) of comfort conditions as preferred
by the homeowner and must have operated for at
least 15 minutes prior to final charge adjustment.
Unit charging is recommended under the following
outdoor conditions ONLY:
Cooling Mode: 55°F [12.8°C] outdoor dry bulb
and above
Heating Mode: Between 40°F [4.4°C] and 60°F
[15.6°C] outdoor dry bulb
NOTICE: Systems should not be charged
below 40°F [4.4°C] outdoor temperature.
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.
2. Note the measured Liquid Pressure, Liq Press =
______psig [kPa], 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 subcooling level is below
the listed requirement for the given outdoor
temperature, add charge. If the measured
subcooling level is above the listed requirement
for the given outdoor temperature, remove charge.
5.9 Completing Installation
• Disconnect the hoses from the pressure ports.
Replace the pressure port caps and tighten
adequately to seal caps. DO NOT overtighten.
• Replace the service valve top caps finger-tight
and then tighten with a wrench to adequately seal
caps. DO NOT overtighten.
• Replace control box cover and service panel and
install screws to secure panels.
• Restore power to unit at disconnect if required.
• Exit Charging Mode and configure EcoNet™
Control Center or thermostat per the thermostat
installation instructions and set to desired mode
and temperature.
5.8.5 R-410A Temperature Pressure Chart
5.0 SYSTEM START-UP AND REFRIGERANT CHARGING
SATURATION
TEMP ºF [ºC]
R-410A
PSIG [kPa]
SATURATION
TEMP ºF [ºC]
R-410A
PSIG [kPa]
SATURATION
TEMP ºF [ºC]
R-410A
PSIG [kPa]
SATURATION
TEMP ºF [ºC]
R-410A
PSIG [kPa]
-150 [-101] – -30 [-34] 17.9 [123.4] 35 [2] 107. 5 [ 741.2] 100 [38] 317.4 [2188.4]
-140 [-96] – -25 [-32] 22.0 [151.7] 40 [4] 118.5 [ 817.0 ] 105 [41] 340.6 [2348.4]
-130 [-90] – -20 [-29] 26.4 [182.0] 45 [7] 130.2 [897.7] 110 [43] 365.1 [2517.3]
-120 [-84] – -15 [-26] 31.3 [215.8] 50 [10] 142.7 [983.9] 115 [46] 390.9 [2695.2]
-110 [-79] – -10 [-23] 36.5 [251.7] 55 [13] 156.0 [1075.6] 120 [49] 418.0 [2882.0]
-100 [-73] – -5 [-21] 42.2 [291.0] 60 [16] 170.1 [1172.8] 125 [52] 446.5 [3078.5]
-90 [-68] – 0 [-18] 48.4 [333.7] 65 [18] 185.1 [1276.2] 130 [54] 476.5 [3285.4]
-80 [-62] – 5 [-15] 55.1 [3 8 0.0] 70 [21] 201.0 [1385.8] 135 [57] 508.0 [3502.5]
-70 [-57] – 10 [-12] 62.4 [430.2] 75 [24] 217.8 [1501.7] 140 [60] 541.2 [3731.4]
-60 [-51] 0.4 [2.8] 15 [-9] 70.2 [484.0] 80 [27] 235.6 [1624.4] 145 [63] 576.0 [3971.4]
-50 [-46] 5.1 [35.2] 20 [-7] 78.5 [541.2] 85 [29] 254.5 [1754.7] 150 [66] 612.8 [4225.1]
-40 [-40] 10.9 [75.2] 25 [-4] 87.5 [603.3] 90 [32] 274.3 [1891.2]
-35 [-37] 14. 2 [ 97.9] 30 [-1] 97.2 [670.2] 95 [35] 295.3 [2036.0]