50
High pressure may be caused by a dirty outdoor coil, failed fan
motor, or outdoor air recirculation. To check switch:
1. Turn off all power to unit.
2. Disconnect leads on switch.
3. Apply ohm meter leads across switch. You should have
continuity on a good switch.
Copeland Scroll Compressor (Puron Refrigerant)
The compressor used in this product is specifically designed to
operate with Puron (R--410A) refrigerant and cannot be
interchanged.
The compressor is an electrical (as well as mechanical) device.
Exercise extreme caution when working near compressors. Power
should be shut off, if possible, for most troubleshooting techniques.
Refrigerants present additional safety hazards.
FIRE/EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury or death and/or property damage.
Wear safety glasses and gloves when handling refrigerants.
Keep torches and other ignition sources away from
refrigerants and oils.
!
WARNING
The scroll compressor pumps refrigerant throughout the system by
the interaction of a stationary and an orbiting scroll. The scroll
compressor has no dynamic suction or discharge valves, and it is
more tolerant of stresses caused by debris, liquid slugging, and
flooded starts. The compressor is equipped with a noise reducing
shutdown device and an internal pressure relief port. The pressure
relief port is a safety device, designed to protect against extreme
high pressure. The relief port has an operating range between 550
(26.34 kPa) and 625 psig (29.93 kPa) differential pressure.
EXPLOSION,
ENVIRONMENTAL
SAFETY
HAZARD
Failure to follow this warning could result in personal
injury, death or equipment damage.
This system uses Puron (R--410A) refrigerant which has
higher operating pressures than R--22 and other refrigerants.
No other refrigerant may be used in this system. Gauge set,
hoses, and recovery system must be designed to handle
Puron. If you are unsure, consult the equipment
manufacturer.
WARNING
!
Refrigerant System
This information covers the refrigerant system of the 48VR--A,
including the compressor oil needed, servicing systems on roofs
containing synthetic materials, the filter drier and refrigerant
charging.
Compressor Oil
The Copeland scroll compressor uses 3MAF POE oil. If additional
oil is needed, use Uniqema RL32--3MAF. If this oil is not
available, use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC.
This oil is extremely hygroscopic, meaning it absorbs water
readily. POE oils can absorb 15 times as much water as other oils
designed for HCFC and CFC refrigerants. Take all necessary
precautions to avoid exposure of the oil to the atmosphere.
Servicing Systems on Roofs with Synthetic Materials
POE (polyolester) compressor lubricants are known to cause long
term damage to some synthetic roofing materials.
Exposure, even if immediately cleaned up, may cause
embrittlement (leading to cracking) to occur in one year or more.
When performing any service that may risk exposure of
compressor oil to the roof, take appropriate precautions to protect
roofing. Procedures which risk oil leakage include, but are not
limited to, compressor replacement, repairing refrigerant leaks,
replacing refrigerant components such as filter drier, pressure
switch, metering device, coil, accumulator, or reversing valve.
Synthetic Roof Precautionary Procedure
1. Cover extended roof working area with an impermeable
polyethylene (plastic) drip cloth or tarp. Cover an
approximate 10 X 10 ft. (3.1 m X 3.1 m) area.
2. Cover area in front of the unit service panel with a terry
cloth shop towel to absorb lubricant spills and prevent
run--offs, and protect drop cloth from tears caused by tools
or components.
3. Place terry cloth shop towel inside unit immediately under
component(s) to be serviced and prevent lubricant run--offs
through the louvered openings in the unit base.
4. Perform required service.
5. Remove and dispose of any oil contaminated material per
local codes.
Liquid Line Filter Drier
This filter drier is specifically designed to operate with Puron. Use
only factory--authorized components. Filter drier must be replaced
whenever the refrigerant system is opened. When removing a filter
drier, use a tubing cutter to cut the drier from the system. Do not
unsweat a filter drier from the system. Heat from unsweating will
release moisture and contaminants from drier into system.
Puron (R--410A) Refrigerant Charging
Refer to unit information plate and charging chart. Some R--410A
refrigerant cylinders contain a dip tube to allow liquid refrigerant to
flow from cylinder in upright position. For cylinders equipped
with a dip tube, charge Puron units with cylinder in upright
position and a commercial metering device in manifold hose.
Charge refrigerant into suction--line.
TROUBLESHOOTING
Use the Troubleshooting Guides (See Tables 14--16) if problems
occur with these units.
START--UP CHECKLIST
Use Start--Up checklist to ensure proper start--up procedures are
followed.
48V
R
--
A
Summary of Contents for Performance 15 48VR-A
Page 5: ...5 A13167 Fig 3 48VR A24 30 Unit Dimensions 48VR A ...
Page 6: ...6 A13168 Fig 4 48VR A36 60 Unit Dimensions 48VR A ...
Page 19: ...19 A13153 Fig 14 208 230 1 60 Connection Wiring Diagram Gas Inputs 40 60 90 KBtu hr 48VR A ...
Page 20: ...20 A13154 Fig 15 Cont 208 230 1 60 Ladder Wiring Diagram Gas Inputs 40 60 90 KBtu hr 48VR A ...
Page 21: ...21 A13155 Fig 15 208 230 1 60 Connection Wiring Diagram Gas Inputs 115 130 KBtu hr 48VR A ...
Page 22: ...22 A13156 Fig 16 Cont 208 230 1 60 Ladder Wiring Diagram Gas Inputs 115 130 KBtu hr 48VR A ...
Page 23: ...23 A13157 Fig 16 208 230 3 60 Connection Wiring Diagram Gas Inputs 40 60 90 KBtu hr 48VR A ...
Page 24: ...24 A13158 Fig 17 Cont 208 230 3 60 Ladder Wiring Diagram Gas Inputs 40 60 90 KBtu hr 48VR A ...
Page 25: ...25 A13159 Fig 17 208 230 3 60 Connection Wiring Diagram Gas Inputs 115 130 48VR A ...
Page 26: ...26 A13160 Fig 18 Cont 208 230 3 60 Ladder Wiring Diagram Gas Inputs 115 130 48VR A ...
