Advertisement
PY5G--B: Installation Instructions
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 R-454B. 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.
R-454B Refrigerant Charging
Refer to unit information plate and charging chart. Some R-454B
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 R-454B units with cylinder in upright position and a commercial
metering device in manifold hose. Charge refrigerant into suction-line.
Troubleshooting
Sequence of Events - Dissipation Mode
1. Refrigerant leaks.
2. Sensor detects leak.
3. Dissipation board send system into Dissipation Mode (energizes G;
de-energizes Y and W.) Dissipation board displays Flash Code 1
until refrigerant concentration decreases, at which point Flash Code
3 is displayed. (See
Table
4. Dissipation Mode continues for at least 10 minutes.
5. 5-minute ON delay for system equipment is enabled.
6. System resumes normal operation.
Flash Codes /Actions
For all flash codes, first try power cycling the system to remove the
code.
No Power
Verify the wiring to/from pins 1 and 8 on the power harness plug. Check
the 24V system wiring from the transformer.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
17)
Flashing 1
Check for refrigerant leaks using an independent R-454B detector. If no
leaks are present, replace the sensor.
Flashing 2
Check both ends of the sensor wire harness to ensure proper attachment.
Power cycle the system to check whether the flash code has been
removed. If the flash code is still present, replace the sensor.
Flashing 3
Check for refrigerant leaks using an independent R-454B detector.
Flashing 4
If the code does not clear after power cycling the system, replace the
dissipation board.
Flashing 5
If the code does not clear after power cycling the system, replace the
sensor.
Flashing 6
Press the test button repeatedly. Power cycle the system. If the button
cannot be reset, replace the dissipation board.
Flashing 7
Verify wiring of all "Y" and "W" wires in the applicable wiring diagram.
Flashing 8
Verify wiring of all "Y" and "W" wires in the applicable wiring diagram.
.Use the Troubleshooting Guides (See
if problems occur with these units.
Start-up Checklist
Use Start-Up checklist to ensure proper start-up procedures are followed.
42
Table
15,
Table
16, and
Table
18)
Advertisement
