Follow these steps to properly start up system:
1.After system is evacuated, fully open liquid and vapor ser- vice valves.
2.Unit is shipped with valve stem(s) front seated (closed) and caps installed. Replace stem caps after system is opened to refrigerant flow. Replace caps
3.Close electrical disconnects to energize system.
4.Set room thermostat at desired temperature. Be sure set point is below indoor ambient temperature.
5.Set room thermostat to COOL and fan control to ON or AUTO mode, as desired. Operate unit for 15 minutes. Check system refrigerant charge.
3-Phase Monitor
In
A00010
Fig. 6 - 3-Phase Monitor Control (Applies to 3-Phase Units Only)
Table 3 – Three-Phase Monitor LED Indicators
LED | STATUS |
OFF | No call for compressor operation |
FLASHING | Reversed phase |
ON | Normal |
!CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
Ensure compressor rotation is correct.
S
SA flash LED on phase monitor indicates reverse rotation. (See Table 3)
This will not allow contractor to be energized.
SDisconnect power to unit and interchange 2
Sequence of Operation
Turn on power to indoor and outdoor units. Transformer is energized.
On a call for cooling, thermostat makes circuits
compressor circuit.
When thermostat is satisfied, its contacts open,
If indoor unit is equipped with a
Check Charge
Factory charge amount and desired subcooling are shown on unit rating plate. Charging method is shown on information plate inside unit. To properly check or adjust charge, conditions must be favorable for subcooling charging. Favorable conditions exist when the outdoor temperature is between 70_F and 100_F (21.11_C and 37.78_C), and the indoor temperature is between 70_F and 80_F (21.11_C and 26.67_C). Follow the procedure below:
Unit is factory charged for 15ft (4.57 m) of lineset. Adjust charge by adding or removing 0.6 oz/ft of 3/8 liquid line above or below 15ft (4.57 m) respectively.
For standard refrigerant line lengths (80 ft/24.38 m or less), allow system to operate in cooling mode at least 15 minutes. If conditions are favorable, check system charge by subcooling method. If any adjustment is necessary, adjust charge slowly and allow system to operate for 15 minutes to stabilize before declaring a properly charged system.
If the indoor temperature is above 80_F (26.67_C), and the outdoor temperature is in the favorable range, adjust system charge by weight based on line length and allow the indoor temperature to drop to 80_F (26.67_C) before attempting to check system charge by subcooling method as described above.
If the indoor temperature is below 70_F (21.11_C), or the outdoor temperature is not in the favorable range, adjust charge for line set length above or below 15ft (4.57 m) only. Charge level should then be appropriate for the system to achieve rated capacity. The charge level could then be checked at another time when the both indoor and outdoor temperatures are in a more favorable range.
NOTE: If line length is beyond 80 ft (24.38 m) or greater than 20 ft (6.10 m) vertical separation, See Long Line Guideline for special charging requirements.
Final Checks
IMPORTANT: Before leaving job, be sure to do the following:
1.Ensure that all wiring is routed away from tubing and sheet metal edges to prevent
2.Ensure that all wiring and tubing is secure in unit before adding panels and covers. Securely fasten all panels and covers.
3.Tighten service valve stem caps to
4.Leave Owner’s Manual with owner. Explain system opera- tion and periodic maintenance requirements outlined in manual.
5.Fill out Dealer Installation Checklist and place in customer file.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equipment failure, periodic maintenance must be performed on this equipment.
Frequency of maintenance may vary depending upon geographic areas, such as coastal applications. See Owner’s Manual for information.
113A / 114A / 116B
5