Reznor YDSA Operation Manual - Manual (Page 10)

Form O-Y, PN 273647R1, Page 10
FIGURE 7 - Condenser Fans
3.5 Coils and
Related Cooling
Components
The DX cooling system is equipped with copper finned coils. Inspect all cooling
system coils at the beginning of the cooling season or more often if needed. Follow
the cleaning instructions below. If additional cleaning is required or if a coil must be
removed for any reason, consult the factory. Be prepared to provide rating plate and
specific installation information.
Condensing Coil Access - The condensing coils are visible on the side of the unit
(below the condenser fans).
Condenser Coil
Cleaning Instructions
1. Verify that the electrical power has been turned off and the disconnect switch
locked.
2. Use a soft brush to remove any dirt and debris from the coils.
3. Spray with cold or warm (not hot) water and a cleaning solution (non-acid based
coil cleaner is recommended). Due to possible damage to the coil, DO NOT use
high pressure spray.
4. When clean, rinse with cool, clean water.
Evaporator Coil Access - The evaporative coils can be accessed by opening the coil
cabinet door.
Inspect coils for debris, dirt, grease, lint, pollen, mold, or any element which would
obstruct heat transfer or airflow. Inspect coils and tubing for physical damage. Inspect
feeders, piping connections, coil headers, and return bends for signs of fatigue, rub-
bing, and physical damage.
Clean the coils annually, or more often if needed. Use the proper tools and follow the
instructions carefully to avoid damaging the coil. Use of a non-acid based coil cleaner
is recommended. Due to possible damage to the coil, DO NOT use high pressure
spray.
Evaporator
Coil Cleaning
Instructions:
1. Verify that the electrical power has been turned off and the disconnect switch
locked.
2. Open the cooling coil door.
3. Use a soft brush to remove any dirt and debris from both sides of the coil.
4. Spray with cold or warm (not hot) water and a cleaning solution (non-acid based
coil cleaner is recommended). Due to possible damage to the coil, DO NOT use
high pressure spray. First spray the leaving airflow side, then the inlet airflow side.
As much as possible, spray the solution perpendicular to the face of the coil.
Follow the instructions on the cleaning solution. When cleaning process is
complete, rinse both sides with cool, clean water.
3.4 Condenser Fans Depending on the model size, there are two or four condenser fans. Fan motors may
be either standard efficiency or ECM speed control. If parts need to be replaced, use
only factory authorized replacement parts.
Condenser Fan Section Assembly
Guard
Housing
Propeller Fan
Fan Support
Motor
3.0 Maintenance and Service Procedures - Unit & Cooling (cont'd)