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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
© 2021 Carrier. All rights reserved.
A Carrier Company
Edition Date: 11/21
Catalog No: IM-PA13N-16NW-10
Replaces:IM-PA13N-16NW-09
PA13*A, PA14NC, PA15NC, PA16N*: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
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 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
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.