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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. Operate
this system in COOLING ONLY. Remove the suction line filter
drier as soon as possible, with a maximum of 72 hours of
operation.
Recommendation: Install a ball valve in the liquid line at the
filter drier location when installing a suction filter in the suc-
tion 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 outdoor
unit according to these installation instructions.
4.
Install the factory-supplied liquid-line filter drier at the
indoor coil just upstream of the TXV.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Never install suction-line filter drier in the liquid-line of an
R-410A system.
5.
If required, install a 100% activated alumina suction line
filter drier at the outdoor unit.
6.
Evacuate and charge the system according to the instruc-
tions in this installation manual.
7.
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 is necessary. Never leave suction-line filter
drier in system longer than 72 hours (actual time).
3
CAUTION
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