Carrier 50LC 07, Service And Maintenance Instructions, Page: 6 / 100

6
to ensure long life of the coil. Failure to clean the coils
may result in reduced durability in the environment.
Avoid the use of
S
coil brighteners
S
acid cleaning prior to painting
S
high pressure washers
S
poor quality water for cleaning
Totaline environmentally sound coil cleaner is
non-flammable, hypoallergenic, non-bacterial, and a
USDA accepted biodegradable agent that will not harm
coil or surrounding components such as electrical wiring,
painted metal surfaces, or insulation. Use of
non-recommended coil cleaners is strongly discouraged
since coil and unit durability could be affected.
Totaline Environmentally Sound Coil Cleaner Application
Equipment
S
2-1/2 gallon garden sprayer
S
water rinse with low velocity spray nozzle
PERSONAL INJURY HAZARD
Failure to follow this caution may result in corrosion
and damage to the unit.
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 Totaline environmentally sound coil cleaner as
described above.
CAUTION
!
PERSONAL INJURY HAZARD
Failure to follow this caution may result in reduced
unit performance.
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
!
Totaline
R
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 gallon garden sprayer according to the
instructions included with the cleaner. The
optimum solution temperature is 100

F (38

C).
NOTE : Do NOT USE water in excess of 130

F (54

C),
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. Reapply 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. Protect fins from damage from
the spray nozzle.
Evaporator Coil Metering Devices
These units use thermal expansion valves (TXV).
Refrigerant System Pressure Access Ports
There are two access ports in each 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 connection fittings are standard 1/4 SAE
Male Flare couplings.
The brass fittings are two--piece High Flow valves, with a
receptacle base brazed to the tubing and an integral
spring--closed check valve core screwed into the base.
(See Fig. 8.) 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--lbs of torque; do not
overtighten.