Routine Cleaning Of Rtpf Coil Surfaces; Condenser Fans; Refrigerant Circuit - Carrier AQUAFORCE 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

ROUTINE CLEANING FOR RTPF COIL SURFACE —
Monthly cleaning with Totaline
cleaner is essential to extend the life of coils. This cleaner is
available from Carrier Replacement Parts division as part num-
ber P902-0301 for a one gallon container, and part number
P902-0305 for a five gallon container. It is recommended that
all coils, including the standard copper tube aluminum fin, pre-
coated fin, copper fin, or e-coated coils be cleaned with the
Totaline environmentally sound coil cleaner as described
below. Coil cleaning should be part of the unit's regularly
scheduled maintenance procedures to ensure long life of the
coil. Failure to clean the coils may result in reduced durability
in the environment. Avoid the use of:
• coil brighteners
• acid cleaning prior to painting
• high pressure washers
• poor quality water for cleaning
Totaline environmentally sound coil cleaner is non-flamma-
ble, hypoallergenic, nonbacterial, and a USDA accepted biode-
gradable agent that will not harm the coil or surrounding com-
ponents such as electrical wiring, painted metal surfaces, or in-
sulation. Use of non-recommended coil cleaners is stongly
discouraged since coil and unit durability could be affected.
Totaline Environmentally Sound Coil Cleaner Application
Equipment
• 2 1 / gallon garden sprayer
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• Water rinse with low velocity spray nozzle
CAUTION
Harsh chemicals, household bleach or acid or basic clean-
ers 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 inter-
face where dissimilar materials are in contact. If there is
dirt below the surface of the coil, use the Totaline environ-
mentally sound coil cleaner as described above.
CAUTION
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. Reduced unit performance
or nuisance unit shutdown may occur.
Totaline Environmentally Sound 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 sound coil cleaner in a
2 1 / gallon garden sprayer according to the instructions
2
included with the cleaner. The optimum solution temper-
ature is 100 F.
NOTE: Do NOT USE water in excess of 130 F (54.4 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.
® environmentally sound coil
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.
Reapplying 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.
Condenser Fans —
deck supports each fan and motor assembly. A shroud and a
wire guard provide protection from the rotating fan. See
Fig. 61. The exposed end of the fan motor shaft is protected
from weather by grease. If fan motor must be removed for
service or replacement, be sure to regrease fan shaft and
reinstall fan guard. The fan motor has a step in the motor shaft.
For proper performance, fan should be positioned such that it is
securely seated on this step. Tighten the bolt to 15 ft lb ± 2.0
(20.34 Nm ± 2.7 Nm) .

Refrigerant Circuit

LEAK TESTING — Units are shipped with complete operat-
ing charge of refrigerant R-134a (see Physical Data tables
supplied in the 30XA installation instructions) and should be
under sufficient pressure to conduct a leak test. If there is no
pressure in the system, introduce enough nitrogen to search for
the leak. Repair the leak using good refrigeration practices.
After leaks are repaired, system must be evacuated and
dehydrated.
REFRIGERANT CHARGE — Refer to Physical Data tables
supplied in the 30XA installation instructions). Immediately
ahead of filter drier in each circuit is a factory-installed liquid
line service valve. Each valve has a
for charging liquid refrigerant.
Charging with Unit Off and Evacuated — Close liquid line
service valve before charging. Weigh in charge shown on unit
nameplate. Open liquid line service valve; start unit and allow
it to run several minutes fully loaded. Check for a clear sight
glass. Be sure clear condition is liquid and not vapor.
Charging with Unit Running — If charge is to be added while
unit is operating, all condenser fans and compressors must be
operating. It may be necessary to block condenser coils at low
ambient temperatures to raise condensing pressure to approxi-
mately 198 psig (1365 kPa) to turn all condenser fans on. Do not
totally block a coil to do this. Partially block all coils in uniform
pattern. Charge each circuit until sight glass shows clear liquid,
and has a liquid line temperature of 103 F (39 C) for 30XA080-
352 units and 108 F (42 C) for 30XA400-500 units.
Add 3 to 5 lb (1.36 to 2.27 kg) depending on unit size of liq-
uid charge into the fitting located on the tube entering the cool-
er. This fitting is located between the electronic expansion
valve (EXV) and the cooler.
Allow the system to stabilize and then recheck the liquid
temperature. If needed, add additional liquid charge, 3 to 5 lb
at a time, allowing the system to stabilize between each charge
addition. Slowly add charge as the sight glass begins to clear to
avoid overcharging.
IMPORTANT: When adjusting refrigerant charge, circu-
late fluid through cooler continuously to prevent freezing
and possible damage to the cooler. Do not overcharge, and
never charge liquid into the low-pressure side of system.
86
A formed metal mount bolted to fan
1 / -in. access connection
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