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Table Of Contents
- Installation Instructions
- SAFETY CONSIDERATIONS
- GENERAL
- 1. Locate unit away from windows, patios, decks, etc. where unit operation sound may disturb customer.
- 2. Ensure that vapor and liquid tube diameters are appropriate for unit capacity.
- 3. Run refrigerant tubes as directly as possible by avoiding unnecessary turns and bends.
- 4. Leave some slack between structure and unit to absorb vibration.
- 5. When passing refrigerant tubes through the wall, seal opening with RTV or other pliable silicon-based caulk. (See Fig. 1.)
- 6. Avoid direct tubing contact with water pipes, duct work, floor joists, wall studs, floors, and walls.
- 7. Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with tubing (see Fig. 1).
- 8. Ensure that tubing insulation is pliable and completely surrounds vapor tube.
- 9. When necessary, use hanger straps which are 1 in. (25.4 mm) wide and conform to shape of tubing insulation. (See Fig. 1.)
- 10. Isolate hanger straps from insulation by using metal sleeves bent to conform to shape of insulation.
- Fig. 1 – Piping Installation
- Installation
- Check Equipment and Job Site
- Install on a Solid, Level Mounting Pad
- Clearance Requirements
- Operating Ambient
- Make Piping Connections
- Fig. 2 – Tiedown Knockout Locations
- Outdoor Unit Connected to Factory Approved Indoor Unit
- Refrigerant Tubing Connection Outdoor
- Sweat Connection
- Install Liquid-Line Filter Drier Indoor
- Evacuate Refrigerant Tubing and Indoor Coil
- Deep Vacuum Method
- Final Tubing Check
- Installing with Indoor Piston
- Fig. 5 – Indoor (Cooling) Piston
- 1. Operate unit a minimum of 15 minutes before checking charge.
- 2. Measure liquid service valve pressure by attaching an accurate gage to service port.
- 3. Measure liquid line temperature by attaching an accurate thermistor type or electronic thermometer to liquid line near outdoor coil.
- 4. Refer to unit rating plate for required subcooling temperature.
- 5. Refer to Table 2 - Rating Plate (required) Subcooling Temperature. Find the point where required subcooling temperature intersects measured liquid service valve pressure.
- 6. To obtain required subcooling temperature at a specific liquid line pressure, add refrigerant if liquid line temperature is higher than indicated or reclaim refrigerant if temperature is lower. Allow a tolerance of 3°F (1.7°C).
- Fig. 5 – Indoor (Cooling) Piston
- Units with Indoor Piston
- 1. Operate unit a minimum of 15 minutes before checking charge.
- 2. Measure suction pressure by attaching an accurate gage to suction valve service port.
- 3. Measure suction temperature by attaching an accurate thermistor type or electronic thermometer to suction line at service valve.
- 4. Measure outdoor air dry-bulb temperature with thermometer.
- 5. Measure indoor air (entering indoor coil) wet-bulb temperature with a sling psychrometer.
- 6. Refer to Table 3 - Superheat Charging - AC Only. Find outdoor temperature and evaporator entering air wet-bulb temperature. At this intersection, note superheat. Where a dash (--) appears on the table, do not attempt to charge system under these c...
- 7. Refer to Table 4 - Required Suction-Line Temperature. Find superheat temperature (from #6 above) and suction pressure. At this intersection, note suction line temperature.
- 8. If unit has a higher suction line temperature than charted temperature, add refrigerant until charted temperature is reached.
- 9. If unit has a lower suction line temperature than charted temperature, reclaim refrigerant until charted temperature is reached.
- 10. When adding refrigerant, charge in liquid form into suction service port using a flow-restricting device.
- 11. If outdoor air temperature or pressure at suction valve changes, charge to new suction line temperature indicated on chart.
- 12. Optimum performance will be achieved when the operating charge produces 10°F suction superheat at suction service valve with 95°F (35°C) outdoor ambient and 80°F (27°C) dry bulb (67°F / 19°C) wet bulb) indoor temperature (DOE “A” test ...
- Table 2 – Rating Plate (required) Subcooling Temperatures
- Table 3 – Superheat Charging - AC Only
- Table 4 – Required Suction-Line Temperature
- Make Electrical Connections
- Compressor Crankcase Heater
- Install Electrical Accessories
- Start-Up
- Follow these steps to properly start up system:
- 1. After system is evacuated, fully open liquid and vapor service 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 finger-tight and tighten with wrench an additional 1/12 turn.
- 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
- Sequence of Operation
- Follow these steps to properly start up system:
- Check Charge
- Final Checks
- 1. Ensure that all wiring is routed away from tubing and sheet metal edges to prevent rub-through or wire pinching.
- 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 1/12-turn past finger tight.
- 4. Leave Owner’s Manual with owner. Explain system operation and periodic maintenance requirements outlined in manual.
- 5. Fill out Dealer Installation Checklist and place in customer file.
- CARE AND MAINTENANCE
PA13*A, PA14NC, PA15NC, PA16N*: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
7
Start-Up
Follow these steps to properly start up system:
1. After system is evacuated, fully open liquid and vapor service
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 finger-tight and tighten with wrench an
additional 1/12 turn.
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 3-phase units a small circuit board is factory installed to monitor line
voltage. A small led will flash if a phase problem exists. See code
descriptions on monitor. If LED is flashing, disconnect power to unit
and interchange 2 field-wiring leads on unit contactor.
A00010
Fig. 7 – 3-Phase Monitor Control
(Applies to 3-Phase Units Only)
Sequence of Operation
Turn on power to indoor and outdoor units. Transformer is energized.
On a call for cooling, thermostat makes circuits R-Y and R-G. Circuit
R-Y energizes contactor, starting outdoor fan motor and compressor
circuit. R-G energizes indoor unit blower relay, starting indoor blower
motor on high speed.
When thermostat is satisfied, its contacts open, de-energizing contactor
and blower relay. Compressor and motors stop.
If indoor unit is equipped with a time-delay relay circuit, the indoor
blower will run an additional 90 seconds to increase system efficiency.
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:
Adjust charge by adding or removing 0.6 oz/ft of 3/8 liquid line above or
below 15 ft. (4.57 m) respectively.
NOTE: For 15 ft. (4.57 m) line set charge, refer to
Table 6 and Table 7
Some unit tonnages may require additional charge depending on size.
Find model tonnage size in table, reference factory charge versus
required charge to determine if additional charge is required. Additional
charge will be needed for line sets longer than 15 ft. (4.57 m).
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 15 ft. (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 35 ft
(10.7 m) vertical separation, See Long Line Guideline for special
charging requirements.
CAUTION
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this caution may result in personal injury, equipment
damage or improper operation.
• S Do not overcharge system with refrigerant.
• S Do not operate unit in a vacuum or at negative pressure.
• S Compressor dome temperatures may be hot.
CAUTION
!
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
Wear safety glasses, protective clothing, and gloves when handling
refrigerant and observe the following:
• S Front seating service valves are equipped with Schrader valves.
Table 5 – Three-Phase Monitor LED Indicator
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.
• 3-phase scroll compressors are rotation sensitive.
• A flash LED on phase monitor indicates reverse rotation. (See
Table 5)
This will not allow contractor to be energized.
• Disconnect power to unit and interchange 2 field-wiring leads on unit
contactor.