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• DEFROST THERMOSTATS
• INDOOR FAN OFF DELAY
• DEFROST SPEEDUP FUNCTIONS
Comfort Alert Diagnostic Module . . . . . . . . . . . . . . 28
Outdoor Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
• FAN MOTORS
• COMPRESSOR
Outdoor Coil Maintenance and Cleaning
Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . 30
• REMOVE SURFACE LOADED FIBERS
• PERIODIC CLEAN WATER RINSE
• ROUTINE CLEANING OF INDOOR COIL SURFACES
FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . 32
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 33
APPENDIX A — AIR CONDITIONER AND HEAT PUMP
WITH PURON
®
— QUICK REFERENCE GUIDE . 34
APPENDIX B — WIRING DIAGRAM LIST . . . . . . . . . 34
APPENDIX C — LOW AMBIENT OPTION —
FACTORY INSTALLED . . . . . . . . . . . . . . . . . . . . . 42
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, mainte-
nance, 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 mod-
ifying 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 extin-
guisher available. Read these instructions thoroughly and follow
all warnings or cautions attached to the unit. Consult local build-
ing 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 in-
structions 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.
WARNING
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.
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury,
death and/or equipment damage.
R-410A refrigerant systems operate at higher pressures than
standard R-22 systems. Do not use R-22 service equipment or
components on R-410A refrigerant equipment.
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 ignition sources away from
refrigerants and oils.
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 units.
See Fig. 1-2 for unit dimensions. For physical data, see Tables 2-3.
For model number nomenclature, see Fig. 3. For date of unit man-
ufacture, see Fig. 4.
Rated Indoor Airflow (cfm)
Table 1 below lists the rated indoor airflow used for the AHRI ef-
ficiency rating for the units covered in this document.
Table 1 — 38AUQ with 40RUQ
MODEL NUMBERS
38AUQT/U16 - 40RUQ*16
38AUQT/U25 - 40RUQ*25
INSTALLATION GUIDELINE
Replacement
/Retrofit
Refrigerant
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.
2
WARNING
WARNING
CAUTION
GENERAL
FULL LOAD AIRFLOW (cfm)
5625
7500
—
R-22
to
Puron
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