Service Manual
40/ 38GRQ
High- W a ll Du ctl es s S pl it System
Sizes 009 to 018
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1.........................
INTRODUCTION 1...................................
MODEL / SERIAL NUMBER NOMENCLATURE 2.........
STANDARD FEATURES AND ACCESSORIES 3...........
SPECIFICATIONS 4...................................
DIMENSIONS 5......................................
CLEARANCES 7.....................................
ELECTRICAL DATA 7................................
WIRING 8...........................................
CONNECTION DIAGRAM 8...........................
WIRING DIAGRAMS 9................................
REFRIGERATION SYSTEM DIAGRAM 12...............
REFRIGERANT LINES 13.............................
CONTROL S YSTEM 14...............................
SYSTEM SAFETIES 14................................
SEQUENCE OF OPERATION 15........................
MODES OF OPERATION 15............................
TROUBLESHOOTING 18..............................
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air- conditioning equipment
can be hazardous due to system pressures, electrical components,
and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should
install, start- up, and service this equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning coils. All other operations should be performed by
trained service personnel.
When working on the equipment, observe precautions in the literature
and on tags, stickers, and labels attached to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep
quenching cloth and fire extinguisher nearby when brazing. Use
care in handling, rigging, and setting bulky equipment.
Read thi s manual thoroughly a nd f ollow a ll wa rnings or cautions
included in literature and attached to the unit. Consult local building
codes a nd Na tional El ectri ca l Code (NEC) for s pecial re quireme nt s.
Recognize sa fety inf orma t ion. This i s t he safety- alert sym bol
!
!
.
Whe n you se e this sym bol on the unit and in instructions or ma nuals,
be al ert to the potential for persona l injury.Understand t hes e signal
words: DANGER, WARNI NG, a nd CAUTION. Thes e words a r e
use d wit h the s a f e t y- ale rt symbol. DANGER i de nti f i e s t he most
serious hazards which will re sult in se vere per sonal injury or dea t h.
WARNING signifies hazards which could result in personal injury or
death. CAUTION is used to identify unsafe practices which may
result in minor pers onal injury or pr oduct and prope rty damage .
NOTE is used to highl i ght sugges t ions which will result in enhanced
installation, reliability, or operation.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF
position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
!
WARNING
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 mm) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may migrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start- up.
INTRODUCTION
This Service Manual provides the necessary information to service,
repair, and maintain the 38- 40GR family of Puron air conditioners
and heat pumps. Section 2 of this manual is an appendix with data
required to perform troubleshooting. Use the Table of Contents to
locate a desired topic.
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