Trane WSC036E Installation, Operation And Maintenance Manual page 45

Note: For units equipped with hail guards follow removal
procedure listed below.
Hail Guard Removal
Figure 45. Slide-style
• Unlatch hail guards.
• Pull the top of the hail guard outward until the fastener
studs are free of the retaining nuts.
• Lift the hail guard from the lower retaining bracket and
set aside.
To clean refrigerant coils, use a soft brush and a sprayer
(either a garden pump-up type or a high-pressure sprayer).
A high-quality detergent is also required; suggested
brands include "SPREX A.C. " , "OAKITE 161" , "OAKITE 166"
and "COILOX" . If the detergent selected is strongly alkaline
(ph value exceeds 8.5), add an inhibitor.
WARNING
Hazardous Chemicals!
Coil cleaning agents can be either acidic or highly
alkaline and can burn severely if contact with skin
occurs. Handle chemical carefully and avoid contact
with skin. ALWAYS wear Personal Protective Equipment
(PPE) including goggles or face shield, chemical
resistant gloves, boots, apron or suit as required. For
personal safety refer to the cleaning agent
manufacturer's Materials Safety Data Sheet and follow
all recommended safe handling practices. Failure to
follow all safety instructions could result in death or
serious injury.
1. Remove enough panels from the unit to gain access to
the coil.
2. Protect all electrical devices such as motors and
controllers from any over spray.
3. Straighten any bent coil fins with a fin comb.
4. Mix the detergent with water according to the
manufacturer's instructions. If desired, heat the
solution to 150°F maximum to improve its cleansing
capability.
RT-SVX23F-EN
WARNING
Hazardous Pressures!
Coils contain refrigerant under pressure. When cleaning
coils, maintain coil cleaning solution temperature
under 150°F to avoid excessive pressure in the coil.
Failure to follow these safety precautions could result
in coil bursting, which could result in death or serious
injury.
Do not heat the detergent-and-water solution above 150°F .
Hot liquids sprayed on the exterior of the coil will raise the
coil's internal pressure and may cause it to burst. Failure to
follow proper procedures can result in personal illness or
injury or severe equipment damage.
5. Pour the cleaning solution into the sprayer. If a high-
pressure sprayer is used:
a. do not allow sprayer pressure to exceed 600 psi.
b. the minimum nozzle spray angle is 15 degrees.
c. maintain a minimum clearance of 6" between the
sprayer nozzle and the coil.
d. spray the solution perpendicular (at 90 degrees) to
the coil face.
6. Spray the leaving-airflow side of the coil first; then
spray the opposite side of the coil. Allow the cleaning
solution to stand on the coil for five minutes.
7. Rinse both sides of the coil with cool, clean water.
8. Inspect both sides of the coil; if it still appears to be
dirty, repeat Step 6 and
9. Reinstall all of the components and panels removed in
Step 1 and any protective covers installed in
Note: For units equipped with hail guards follow
reinstallation procedure listed below.
Hail Guard Reinstallation
To reinstall the hail guard, locate the bottom of the hail
guard in the lower bracket and secure it to the upper unit
bracket with the attached fasteners.
Note: Secure hail guard latches.
Maintenance
Step 7.
Step 2.
45