22
E-COAT ENZYME CLEANER APPLICATION
INSTRUCTIONS — Perform the following procedure to
clean the coil.
NOTE: Wear proper eye protection such as safety glasses
during mixing and application.
1. Remove all surface debris and dirt from the coil with a
vacuum cleaner.
2. Thoroughly wet finned surfaces with clean water and a
low velocity garden hose, being careful not to bend
fins.
3. Mix E-Coat Enzyme Cleaner in a 2
1
/
2
gallon garden
sprayer according to the instructions included with the
Enzyme Cleaner. The optimum solution temperature is
100 F.
4. Thoroughly apply E-Coat Enzyme Cleaner solution to
all coil surfaces including finned area, tube sheets and
coil headers. 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. Ensure cleaner
thoroughly penetrates deep into finned areas. Interior
and exterior finned areas must be thoroughly cleaned.
5. Allow finned surfaces to remain wet with cleaning
solution for 10 minutes. Ensure surfaces are not
allowed to dry before rinsing. Reapply cleaner as
needed to ensure 10-minute saturation is achieved.
6. 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
.
Fan Motor Removal
1. Make certain condenser power is off.
2. Remove fan guard and fan.
3. Loosen nut on motor holding clamp securing motor to
motor support.
4. Lift motor upward. Remove wire connectors.
Head Pressure Control — This feature reduces con-
densing capacity under low ambient temperature conditions.
FAN CYCLING — Model 09DK units have accessory provi-
sion for fully automatic intermediate-season head pressure
control through condenser fan cycling. Fan number 2 and 3
cycling (fan number 3 on 09DK034 and 044 only) is con-
trolled by outdoor-air temperature through air temperature
switches (ATS) 1 and 2.
The air temperature switches are located in the lower divid-
er panel underneath the coil header. The sensing element is ex-
posed to air entering the no. 1 fan compartment through a hole
in the panel. Fan no. 1 is non-cycling. Table 5 shows operating
settings of the air temperature switches.
Table 5 — Fan Cycling Controls
DO NOT USE water in excess of 130 F. Enzymes in coil
cleaner will be destroyed and coil cleaner will not be
effective.
Do not use bleach, harsh chemicals, or acid cleaners on
outdoor or indoor coils of any kind. These types of cleaners
are difficult to rinse, and they promote rapid corrosion of
the fin collar-copper tube connection. Only use the E-Coat
Enzyme Coil Cleaner.
Never use high pressure air or liquids to clean coils.
High pressures damage coils and increase the airside pres-
sure drop. To promote unit integrity, follow cleaning and
maintenance procedures in this document.
UNIT 09DK 020 024 028 034 044
No. 2 Fan
Temp Close, F (C) 70 ± 3 (21.1 ± 1.7) 65 ± 3 (18.3 ± 1.7)
Open, F (C) 60 ± 3 (15.6 ± 1.7) 55 ± 3 (12.8 ± 1.7)
No. 3 Fan
Temp Close, F (C) — — — 80 ± 3 (26.7 ± 1.7)
Open, F (C) — — — 70 ± 3 (21.1 ± 1.7)
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