Rapid 7500 136 Installation, operation & service manual - page 131
SECTION 17: M
AINTENANCE
119 of 143
17.
8
Coolin
g
Coil(s)
An ann
u
al inspection of the coil(s) m
u
st
b
e made to ins
u
re proper operation.
For the most part coils req
u
ire
v
ery little maintenance, ho
w
e
v
er if the applica-
tion is extremely dirty or d
u
sty, it may
b
ecome necessary to periodically clean
the coil(s). High press
u
re
w
ater (700 psi or less) can
b
e
u
sed to clean coils
w
ith fins at least 0.0095 inches thick.
IMPORTANT: Test the spray press
u
re on a small area of the coil(s) to see
ho
w
w
ell the fins
w
ithstand the high press
u
re.
Spray in the direction opposite of airflo
w
to p
u
sh dirt o
u
t the front of the coil.
Foaming chemical sprays and
w
ashes are a
v
aila
b
le and sho
u
ld
b
e
u
sed
instead of high press
u
re on the more fragile fins or
w
hen high fin density does
not facilitate high press
u
re
w
ater cleaning.