INSTALLATION STEPS
17
6. Set the Fan to AUTO or ON as desired, then set the room thermostat to COOL or HEAT. Wait for the appropriate time delay(s).
Operate the system for 30 minutes after the initial charge, ensuring the thermostat setting will not be satisfied. Open windows
or doors if necessary.
(NOTE) While waiting, be sure the line set is secure and insulated separately. This is a good time to double check the installation
procedure. Check over the system for any unusual vibrations and/or noises.
7. Set the room thermostat 10 degrees or more above or below the desired room temperature allowing 2
nd
Stage operation while
charging. This may bring on a 3
rd
stage call (W2) from the thermostat and turn on auxiliary heat in the heating mode.
(NOTE) Do not allow the temperature settings to be reached until the charge is complete. Open the doors and windows if
necessary while charging to ensure continuous operation. Be sure the set point is above or below the indoor ambient and is set
high or low enough to keep the desired 2
nd
Stage energized.
Ensure the proper stage is operating by reviewing the thermostat requirements for a 2
nd
Stage call, and viewing the indicator display
provided on the Acadia outdoor unit Controller. See (Fig. 2, Appendix A) and (Table 3 through 5) for the location of the LCD
indicator display and the corresponding mode.
Step 9 – Checking the Refrigerant Charge
SYSTEM CHARGING
With the Acadia outdoor unit operating, charge the system (if necessary) with liquid R-410A using a commercial type R-410A rated
gage manifold and hose assembly. Charge the system with refri on the outside of the unit, metering
it slowly. Check the charge in heating mode only. Adjust the charge in heating using the following procedure:
(CAUTION) Additional charge added through the charging line must be slowly metered in to prevent liquid refrigerant from
entering the compressors.
(NOTE) The Acadia system is to be charged in high capacity only (2
nd
Stage thermostat call).
(NOTE) Above 60°F (16.7°C), charge the system using the line set chart, see (Table 1, Appendix C). A return trip in the heating
season is required to double check the charge amount for optimal efficiency.
HEATING CHARGE CHECK PROCEDURE
(CAUTION) R-410A is miscible with POE oil in the system. Let the system run in normal operation for an adequate amount of
time (20 minutes minimum) after startup or a defrost cycle to ensure an accurate sub-cooling reading.
1. Operate the system a minimum of 20 minutes before checking charge.
2. Measure the liquid service valve pressure by attaching an accurate R-410
3. Measure the liquid line temperature by attaching and insulating an accurate thermistor type or electronic thermometer to the
liquid line near the Acadia outdoor unit. Use the pressure/temperature chart to calculate sub-cooling (Table 15, Appendix C).
4. Refer to the charging table for required sub-cooling temperatures; see (Table 14, Appendix C). If the sub-cooling is other than
what is indicated on the chart, consult Hallowell International Technical Support.
(NOTE) For every 1 lbs. of additional refrigerant added, allow an adequate amount of time (20 minutes minimum) for the system
to settle before taking another sub-cooling reading.
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