7
Totaline Environmentally Sound Coil Cleaner Application
Instructions
1. Proper eye protection such as safety glasses is recommended
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 sound coil cleaner in a 2
1
/
2
gal-
lon garden sprayer according to the instructions included with
the cleaner. The optimum solution temperature 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 sound 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 spraying
in horizontal pattern to minimize potential for fin damage.
7. Ensure cleaner thoroughly penetrates deep into finned areas.
8. Interior and exterior finned areas must be thoroughly cleaned.
9. Finned surfaces should remain wet with cleaning solution for
10 minutes.
10. Ensure surfaces are not allowed to dry before rinsing. Reap-
plying cleaner as needed to ensure 10 minute saturation is
achieved.
11. Thoroughly rinse all surfaces with low velocity clean water
using downward rinsing motion of water spray nozzle. Pro-
tect fins from damage from the spray nozzle.
Evaporator Coil
CLEANING THE EVAPORATOR COIL
1. Turn unit power off. Install lockout tag. Remove evaporator
coil access panel.
2. If economizer or two-position damper is installed, remove
economizer by disconnecting Molex plug and removing
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
The metering devices are multiple fixed-bore devices (Acutrol™)
swedged into the horizontal outlet tubes from the liquid header, lo-
cated 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 metering
devices, disconnect the supply fan contactor (IFC) coil, 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 indicate a plugged or a miss-
ing orifice.
Refrigerant System Pressure Access Ports
There are two access ports in the system - on the suction tube near
the compressor and on the discharge tube near the compressor.
These are brass fittings with black plastic caps. The hose connec-
tion fittings are standard
1
/
4
-in. SAE male flare couplings.
The brass fittings are two-piece High Flow valves, with a recepta-
cle base brazed to the tubing and an integral spring-closed check
valve core screwed into the base. (See Fig. 11.) This check valve is
permanently assembled into this core body and cannot be serviced
separately; replace the entire core body if necessary. Service tools
are available from RCD that allow the replacement of the check
valve core without having to recover the entire system refrigerant
charge. Apply compressor refrigerant oil to the check valve core’s
bottom O-ring. Install the fitting body with 96 ± 10 in-lb of torque;
do not overtighten.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in reduced unit perfor-
mance 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 air-
side pressure drop.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in accelerated corro-
sion 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 dissim-
ilar materials are in contact. If there is dirt below the surface of
the coil, use the environmentally balanced coil cleaner.
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