PTEC-M-1A
4
General
Information
Literature Change History
PTEC-M-1 (September 1997)
Original issue of manual; specifically
intended for use by experienced
service technicians. Provides
operation and maintenance
procedures for PTEC and PTHC units
of “ C” and later designs. Unit
specifications, performance data and
typical wiring diagram(s) are also
included. (RS4200002 397)
Environmental Accountability
Policy
Trane urges that all HVAC servicers working
on Company equipment or any
manufacturer’s products, make every effort to
eliminate, if possible, or vigorously reduce
the emission of CFC, HCFC and HFC
refrigerants to the atmosphere resulting from
installation, operation, routine maintenance,
or major service on this equipment. Always
act in a responsible manner to conserve
refrigerants for continued usage even when
acceptable alternatives are available.
Recover and Recycle Refrigerants
Refrigerant used in centrifugal water chillers
should be recovered and/or recycled for
reuse, reprocessed (reclaimed), or properly
disposed of, whenever it is removed from the
equipment . Never release to atmosphere!
Always determine recycle or reclaim
requirements of the refrigerant before
beginning recovery procedure. Obtain a
chemical analysis of the refrigerant if
necessary. (Questions about recovered
refrigerant and acceptable refrigerant quality
standards are addressed in ARI Standard
700).
Refrigerant Handling and Safety
Consult manufacturer’s Material Safety Data
Sheets (MSDS) on refrigerants being handled
to understand health, safety, storage,
handling and disposal requirements. Use
approved containment vessels and refer to
appropriate safety standards. Comply with all
applicable transportation standards when
shipping refrigerant containers.
Service Equipment and Procedures
To minimize refrigerant emissions while
recovering the refrigerant , use recycling
equipment such as a Company recycle/
recovery system or equivalent. Use
equipment and methods which will pull the
lowest possible system vacuum while
recovering and condensing refrigerant.
Equipment capable of pulling a vacuum of
less than 1,000 microns (1.0 mm) of mercury
is recommended. Do not open the unit to
atmosphere for service work until the
refrigerant charge is fully removed/recovered.
When leak-testing with trace refrigerant and
nitrogen, use HCFC-22 (R-22) rather than CFC-
12 (R-12) or any other fully-halogenated
refrigerant . Be aware of any new leak test
methods which may eliminate refrigerants as
a trace gas. Evacuation prior to charging
should be done with a vacuum pump capable
of pulling a vacuum of 1,000 microns (1.0
mm) of mercury or less. The unit should
stand for 12 hours and the vacuum should
not rise above 2,500 microns (2.6 mm) of
mercury. A rise above 2,500 microns (2.5 mm)
of mercury indicates a leak test is required to
locate and repair any leaks. A leak test will be
required on any repaired area. Charge
refrigerant into the machine only when it is
determined that the machine does not leak or
contain moisture. Charge refrigerant into the
machine by weight. A proper charge is
required for efficient machine operation.
When charging is complete, purge or drain
charging lines into an approved refrigerant
container. Seal all used refrigerant containers
with approved closure devices to prevent
unused refrigerant from escaping to the
atmosphere. Take extra care to properly
maintain all service equipment directly
supporting refrigerant service work such as
gauges, hoses, vacuum pumps, and recycling
equipment . When cleaning system
components or parts, avoid using CFC-11 (R-
11) or CFC-113 (R-113). Use only
cleaning-solvents that do not have ozone
depletion factors. Properly dispose of used
materials. Refrigeration system cleanup
methods using filters and driers are preferred.
Maintain the purge unit on centrifugal water
chillers in proper working condition. An
improperly maintained purge unit can cause
significant refrigerant emissions to the
atmosphere. Consider replacing older
operational purge units with the new
Company Purifier Purge unit. Excessive purge
operation is an indication of possible
refrigerant leakage. Check for leaks when
excessive purge operation is observed.
Future Developments
Keep abreast of unit enhancements,
conversion refrigerants, compatible parts,
and manufacturer’s recommendations which
will reduce refrigerant emissions and increase
equipment operating efficiencies. Follow
specific manufacturer’s guidelines for
conversion of existing equipment . Use only
Company approved gaskets, O-rings, oil
filters, and other components on centrifugal
water chillers or CenTraVacs. In order to assist
in reducing power generation requirements,
always attempt to improve chiller equipment
performance with improved maintenance
operations which will help conserve energy
resources. Items to be considered include
tube cleanliness, proper water flows, correct
refrigerant charge, cooling tower
maintenance, and proper operation of
controls and features such as free cooling,
chilled water reset functions, and time of day
scheduling.
PTEC-M-1A (July 2002)
Product update. New control board
features.
Содержание PTEC-070
Страница 22: ...PTEC M 1A 22 Refrigeration System PTEC Refrigeration System...
Страница 54: ...PTEC M 1A 54 Schematic Diagrams PTEC and PTHC Condensate Pump One Stage Heat...
Страница 55: ...55 PTEC M 1A Schematic Diagrams PTEC and PTHC Condensate Pump Two Stage Heat...
Страница 56: ...PTEC M 1A 56 Schematic Diagrams PTEC and PTHC Power Vent One Stage Heat...
Страница 57: ...57 PTEC M 1A Schematic Diagrams PTEC and PTHC Power Vent Two Stage Heat...
Страница 58: ...PTEC M 1A 58 PTEC and PTHC Power Door One Stage Heat Schematic Diagrams...
Страница 59: ...59 PTEC M 1A Schematic Diagrams PTEC and PTHC Power Door Two Stage Heat...
Страница 60: ...PTEC M 1A 60 Schematic Diagrams PTEC and PTHC Condensate Pump with Power Vent One Stage Heat...
Страница 61: ...61 PTEC M 1A Schematic Diagrams PTEC and PTHC Condensate Pump with Power Vent Two Stage Heat...
Страница 62: ...PTEC M 1A 62 Schematic Diagrams Hydronic...
Страница 63: ......
