Carrier 38AUQ 16 Series, Installation, Start-Up And Service Instructions Manual

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SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal
injury or property damage. Consult a qualified installer,
service agency, or your distributor or branch for
information or assistance. The qualified installer or
agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual
instructions package
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70,
National Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
It is important to recognize safety information. This is the
safety--alert symbol
. When you see this symbol on the
unit and in instructions or manuals, be alert to the
potential for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety-alert symbol. DANGER identifies the most serious
hazards which
will
result in severe personal injury or
death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify
unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause in personal
injury or death.
Before performing service or maintenance operations
on unit, always turn off main power switch to unit and
install lockout tag. Unit may have more than one
power switch.
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puron
R (R--410A) refrigerant systems operate at
higher pressures than standard R--22 systems. Do not
use R--22 service equipment or components on Puron
refrigerant equipment.
!
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignitions sources
away from refrigerants and oils.
!
WARNING
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts and servicing
38AUQ units.
CAUTION
!
INSTALLATION GUIDELINE
Replacement /Retrofit – R22 to Puron
®
Split system heat pumps are intended to be installed with
matching indoor sections only. The 38AUQ heat pump
outdoor units are matched only with same-size 40RUQ
indoor sections. Existing R-22 indoor coils cannot be
converted to R-410A heat pump duty. Only the existing
refrigerant piping is a candidate for retrofit use.
Acid test – If the existing system is being replaced
because of a compressor electrical failure, assume acid is
in system. If system is being replaced for any other
reason, use an approved acid test kit to determine acid
level. If even low levels of acid are detected, install a 100
percent activated alumina suction line filter drier in
addition to the replacement liquid-line filter drier. Operate
this system in COOLING ONLY. Remove the suction line
filter drier as soon as possible, with a maximum of 72 hr
of operation.
Recommendation: Install a ball valve in the liquid line at
the filter drier location when installing a suction filter in
the suction line.
Installation –
1. Remove the existing evaporator coil or fan coil and
install the replacement coil.
2. Drain oil from low points and traps in suction line
tubing if they were not replaced.
3. Remove the existing outdoor unit. Install the new out-
door unit according to these installation instructions.
4. Install the factory-supplied liquid-line filter drier at
the indoor coil just upstream of the TXV.
38A
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