Heating Season; Coil Cleaning; Refrigerant Coils - Trane Axiom GWS Series Installation, Operation And Maintenance Manual

N N o o t t e e : : Do not release refrigerant to the atmosphere! If
adding or removing refrigerant is required, the
service technician must comply with all federal,
state and local laws.

Heating Season

• Inspect the unit's air filters. If necessary, clean or
replace them.
• Check supply fan motor bearings; repair or replace
the motor as necessary.
• Inspect both the main unit control panel and heat
section control box for loose electrical components
and terminal connections, as well as damaged wire
insulation. Make any necessary repairs.
• Verify that the electric heat system operates
properly.

Coil Cleaning

Regular coil maintenance, including annual cleaning
enhances the unit's operating efficiency by minimizing
the following:
• Compressor head pressure and amperage draw
• Water carryover
• Fan brake horsepower
• Static pressure losses
At least once each year—or more often if the unit is
located in a "dirty" environment—clean the evaporator
coils using the instructions outlined below. Be sure to
follow these instructions as closely as possible to avoid
damaging the coils.
W W A A R R N N I I N N G G
H H a a z z a a r r d d o o u u s s C C h h e e m m i i c c a a l l s s ! !
C C o o i i l l c c l l e e a a n n i i n n g g a a g g e e n n t t s s c c a a n n b b e e e e i i t t h h e e r r a a c c i i d d i i c c o o r r h h i i g g h h l l y y
a a l l k k a a l l i i n n e e a a n n d d c c a a n n b b u u r r n n s s e e v v e e r r e e l l y y i i f f c c o o n n t t a a c c t t w w i i t t h h s s k k i i n n
o o r r e e y y e e s s o o c c c c u u r r s s . .
H H a a n n d d l l e e c c h h e e m m i i c c a a l l c c a a r r e e f f u u l l l l y y a a n n d d a a v v o o i i d d c c o o n n t t a a c c t t w w i i t t h h
s s k k i i n n . . A A L L W W A A Y Y S S w w e e a a r r P P e e r r s s o o n n a a l l P P r r o o t t e e c c t t i i v v e e
E E q q u u i i p p m m e e n n t t ( ( P P P P E E ) ) i i n n c c l l u u d d i i n n g g g g o o g g g g l l e e s s o o r r f f a a c c e e s s h h i i e e l l d d , ,
c c h h e e m m i i c c a a l l r r e e s s i i s s t t a a n n t t g g l l o o v v e e s s , , b b o o o o t t s s , , a a p p r r o o n n o o r r s s u u i i t t a a s s
r r e e q q u u i i r r e e d d . . F F o o r r p p e e r r s s o o n n a a l l s s a a f f e e t t y y r r e e f f e e r r t t o o t t h h e e c c l l e e a a n n i i n n g g
a a g g e e n n t t m m a a n n u u f f a a c c t t u u r r e e r r ' ' s s M M a a t t e e r r i i a a l l s s S S a a f f e e t t y y D D a a t t a a S S h h e e e e t t
a a n n d d f f o o l l l l o o w w a a l l l l r r e e c c o o m m m m e e n n d d e e d d s s a a f f e e h h a a n n d d l l i i n n g g
p p r r a a c c t t i i c c e e s s . .
WSHP-SVX015C-EN

Refrigerant Coils

To clean refrigerant coils, use a soft brush and a
sprayer.
For evaporator coil cleaners, contact the local Trane
Parts Center for appropriate detergents.
1. Remove enough panels from the unit to gain safe
access to coils.
2. Straighten any bent coil fins with a fin comb.
3. For accessible areas, remove loose dirt and debris
from both sides of the coil.
4. When cleaning evaporator coils, 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.
I I m m p p o o r r t t a a n n t t : : DO NOT use any detergents with
microchannel coils. Pressurized water
or air ONLY.
5. Pour the cleaning solution into the sprayer. If a
high-pressure sprayer is used:
a. The minimum nozzle spray angle is 15 degrees.
b. Do not allow sprayer pressure to exceed 600 psi.
c. Spray the solution perpendicular (at 90 degrees)
to the coil face.
d. For evaporator coils, maintain a minimum
clearance of 6" between the sprayer nozzle and
the coil. For microchannel coils, optimum
clearance between the sprayer nozzle and the
microchannel coil is 1"-3".
6. Spray the leaving-airflow side of the coil first; then
spray the opposite side of the coil. For
evaporatorcoils, 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 Steps 6 and 7.
9. Reinstall all of the components and panels removed
in Step 1; then restore power to the unit.
10. For evaporator coils, use a fin comb to straighten
any coil fins which were inadvertently bent during
the cleaning process.
M M a a i i n n t t e e n n a a n n c c e e
67