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Hairpin
End
102 mm
(4" MAX)
Spacer
(Field-Supplied)
Center Baffle
Fig. 17 — Separating Coil Sections
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in reduced unit
performance or unit shutdown.
High velocity water from a pressure washer, garden hose,
or compressed air should never be used to clean a coil. The
force of the water or air jet will bend the fin edges and
increase airside pressure drop.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in accelerated
corrosion of unit parts.
Harsh chemicals, household bleach or acid or basic
cleaners should not be used to clean outdoor or indoor coils
of any kind. These cleaners can be very difficult to rinse out
of the coil and can accelerate corrosion at the fin/tube
interface where dissimilar materials are in contact. If there
is dirt below the surface of the coil, use the environmentally
balanced coil cleaner.
Totaline Environmentally Balanced Coil Cleaner Application
Instructions
1.
Proper eye protection such as safety glasses is recom-
mended during mixing and application.
2.
Remove all surface loaded fibers and dirt with a vacuum
cleaner as described above.
3.
Thoroughly wet finned surfaces with clean water and a
low velocity garden hose, being careful not to bend fins.
4.
Mix Totaline environmentally balanced coil cleaner in a
2-1/2 gallon garden sprayer according to the instructions
included with the cleaner. The optimum solution tempera-
ture is 100°F.
NOTE: Do NOT USE water in excess of 130°F, as the enzymatic
activity will be destroyed.
5.
Thoroughly apply Totaline environmentally balanced coil
cleaner solution to all coil surfaces including finned area,
tube sheets and coil headers.
6.
Hold garden sprayer nozzle close to finned areas and apply
cleaner with a vertical, up-and-down motion. Avoid spray-
ing in horizontal pattern to minimize potential for fin
damage.
Condenser
7.
Ensure cleaner thoroughly penetrates deep into finned
Coil
areas. Interior and exterior finned areas must be thor-
oughly cleaned. Finned surfaces should remain wet with
cleaning solution for 10 minutes. Ensure surfaces are not
allowed to dry before rinsing. Reapply cleaner as needed
to ensure 10-minute saturation is achieved.
Inner
8.
Thoroughly rinse all surfaces with low velocity clean
Coil
Section
water using downward rinsing motion of water spray noz-
zle. Protect fins from damage from the spray nozzle.
Evaporator Coil
Cleaning the Evaporator Coil
Outer
Coil
1.
Turn unit power off. Install lockout tag. Remove evapora-
Section
tor coil access panel.
2.
If economizer or two-position damper is installed, remove
economizer by disconnecting Molex
mounting screws.
3.
Slide filters out of unit.
4.
Clean coil using a commercial coil cleaner or dishwasher
detergent in a pressurized spray canister. Wash both sides
of coil and flush with clean water. For best results, back-
flush toward return-air section to remove foreign material.
Flush condensate pan after completion.
5.
Reinstall economizer and filters.
6.
Reconnect wiring.
7.
Replace access panels.
Evaporator Coil Metering Devices
Three different evaporator coil metering systems are used on
559K
sizes
Humidi-MiZer
metering. 559K*07 units with or without the Perfect Humidity
option use a TXV-distributer system.
UNIT SIZE
04-06
07
Check the unit's information data plate for Position 8 value,
then compare this value to the Model Number Nomenclature
on page 56 to confirm the unit's construction.
The metering devices are multiple fixed-bore devices (Acutrol)
swaged into the horizontal outlet tubes from the liquid header,
located at the entrance to each evaporator coil circuit path.
These are non-adjustable. Service requires replacing the entire
liquid header assembly.
To check for possible blockage of one or more of these meter-
ing devices, jumper R to Y1 without the G terminal jumpered,
then start the compressor and observe the frosting pattern on
the face of the evaporator coil. A frost pattern should develop
uniformly across the face of the coil starting at each horizontal
header tube. Failure to develop frost at an outlet tube can indi-
cate a plugged or missing orifice.
1. Third-party trademarks and logos are the property of their respective
owners.
11
1
04-07.
559K*04-06
units
option use the Acutrol
system for evaporator
®
™
PERFECT
EVAPORATOR METERING
HUMIDITY
NO
YES
NO
YES
plug and removing
without
the
™
Acutrol
Acutrol and TXV
TXV
TXV
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