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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 ignition sources away from
refrigerants and oils.
CAUTION
PERSONAL INJURY 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 air conditioning
equipment.
INSTALLATION GUIDELINES
Replacement/Retrofit — R-22 to Puron Refrigerant
Replacement/retrofit installations require change-out of out-
door unit, metering device, and filter driers. Change-out of
indoor coil (evaporator) and interconnecting tubing is
recommended.
EXISTING EVAPORATOR COIL
If the existing evaporator coil may be re-used, check with the
coil manufacturer to verify the coil construction is suitable for
operation with the higher pressures of Puron
(R-410A). Also determine if the existing TXV valve is com-
patible with R-410A, replace if necessary. The minimum facto-
ry test pressure rating must be 250 psig (1725 kPa). Existing
coil will need to be purged with Nitrogen to remove as much
mineral oil as possible to eliminate cross contamination of oils.
ACID TEST
If the existing system is being replaced because of a compres-
sor electrical failure, assume acid is in system. If system is be-
ing 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. Remove
the suction line filter drier as soon as possible, with a maxi-
mum of 72 hr of operation. Recommendation: Install a ball
valve in the liquid line at the filter drier location when install-
ing a suction filter in the suction line.
EXISTING REFRIGERATION PIPING
Reuse of existing refrigerant piping involves three issues: qual-
ity (strength) of existing tubing, cleanliness and tube size. In-
spect all tube segments and joints for signs of damage, corro-
sion or poor brazing. Flush the interconnecting piping system
with dry Nitrogen to eliminate as much trace of mineral oil as
possible.
Same tube sizes are capable of handling higher flow rates (ex-
pressed as tons of cooling capacity) with Puron refrigerant
compared to R-22 at constant pressure drops. For example, a
1/2-inch OD liquid line is rated at 33% higher tons with Puron
than with R-22 (at 5°F pressure drop). A 1-1/8 inch OD suction
line is rated at 53% higher tons with Puron than with R-22 (at
2°F pressure drop). Refrigeration lines selected for R-22 use
are typically oversized for Puron applications. Carefully check
the existing suction line size against the table for maximum
size; replace vertical riser segments if necessary. Check exist-
ing liquid line size against sizing data in Tables 7 and 8 or; re-
place with smaller lines when feasible.
INSTALLATION
1.
Remove the existing evaporator coil or fan coil and install
the replacement coil when appropriate.
2.
Drain oil from low points and traps in suction line tubing
and evaporator if they were not replaced. Removing oil
from evaporator coil may require purging of the tubing
with dry nitrogen.
3.
Unless indoor unit is equipped with a Puron approved
metering device, change the metering device to a thermal
expansion valve (TXV) designed for Puron refrigerant
(R-410A).
4.
Remove the existing outdoor unit. Install the new outdoor
unit according to these installation instructions.
5.
Install a new field-supplied liquid-line filter drier at the
indoor coil just upstream of the TXV or fix orifice meter-
ing device.
6.
If a suction line filter drier is also to be installed, install
suction line drier downstream of suction line service valve
at condensing unit.
EQUIPMENT DAMAGE
Failure to follow this caution can result in equipment
damage.
Do not install a suction-line filter drier in liquid line. A
liquid-line filter drier designed for use with R-410A
refrigerant is required on every unit.
®
refrigerant
7.
If required, install a 100% activated alumina suction line
filter drier at the outdoor unit.
8.
Evacuate and charge the system according to the instruc-
tions in this installation manual.
9.
Operate the system for 10 hr. Monitor the pressure drop
across the suction line filter drier. If pressure drop exceeds
3 psig (21 kPa), replace suction-line and liquid-line filter
driers. Be sure to purge system with dry nitrogen and
evacuate when replacing filter driers. Continue to monitor
the pressure drop across suction-line filter drier. Repeat
filter changes if necessary. Never leave suction-line filter
drier in system longer than 72 hr (actual time).
Rated Indoor Airflow (cfm)
Tables 1 and 2 lists the rated indoor airflow used for the AHRI
efficiency rating for the units covered in this document.
MODEL NUMBERS
MODEL NUMBERS
2
CAUTION
Table 1 — 569J*16-25A/B with 524J***A
FULL LOAD AIRFLOW (CFM)
569J*16A/B
569J*25A/B
Table 2 — 569J*16-28T/U with 524J***A
FULL LOAD AIRFLOW (CFM)
569J*16T/U
569J*25T/U
569J*28T/U
6000
8300
5625
8000
9375
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