Trane RTAF HE Series, Установка, эксплуатация и обслуживание

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RLC-SVX19A-E4 56
Condenser Coils MCHE Maintenance
Cleaning Procedures
• It is mandatory to clean regularly the coils for a proper
unit operation. Eliminate pollution and other residual
material help to extend the life of the coils and the unit
CAUTION! Equipment Damage! Do not use coil cleaning
agents to clean uncoated RTAF coils. Use clean water
only. Use of coil cleaning agents on uncoated RTAF coils
could cause damage to coils.
• Regular coil maintenance, including annual cleaning-
enhances the unit’s operating effi ciency by minimizing
compressor head pressure and amperage draw.
The condenser coil should be cleaned at least once
each year or more if the unit is located in a “dirty”
or corrosive environment. Cleaning with cleansers
or detergents is strongly discouraged due to the
all-aluminum construction; straight water should
prove suffi cient. Any breach in the tubes can result in
refrigerant leaks
WARNING! Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
1. Disconnect Power to the unit.
CAUTION! Personal Protective Equipment (PPE)
Required!
ALWAYS wear Personal Protective Equipment (PPE)
including goggles or face shield, chemical resistant
gloves, boots, apron or suit as required. If it becomes
necessary to use cleaning agent, refer to the
manufacturer’s Materials Safety Data Sheet and follow all
recommended safe handling practices. Failure to follow
all safety instructions could result in minor to moderate
injury.
2. Wear proper personal protection equipment such as
a face shield, gloves and waterproof clothing.
3. Remove enough panels from the unit to gain safe
access to the microchannel coil.
Note: It is better to clean the coil from the opposite
direction of normal air fl ow (inside of unit out) because
this allows the debris to be pushed out rather than forced
further into the coil.
WARNING! No Step Surface!
Do not walk on the sheet metal drain pan. Walking on the
drain pan could cause the supporting metal to collapse,
resulting in the operator/technician to fall. Failure to
follow this recommendation could result in death or
serious injury. Important: Bridging between the main
supports required before attempting to enter the unit.
Bridging may consist of multiple 2 by 12 boards or sheet
metal grating.
4. Use a soft brush or vacuum to remove base debris or
surface loaded fi bers from both sides of the coil.
5. Using a sprayer and water ONLY, clean the coil
following the guidelines below.
a. Sprayer nozzle pressure should not exceed
40 bars.
b. The maximum source angle should not exceed
25 degrees (Figure 27) to the face of the coil. For
best results spray the microchannel perpendicular
to face of the coil.
c. Spray nozzle should be approximately 1”-3” from
the coil surface.
d. Use at least a 15º fan type of spray nozzle.
Figure 27 – Sprayer source angle
To avoid damage from the spray wand contacting the
coil, make sure the 90º attachment does not come in
contact with the tube and fi n as abrasion to the coil
could result.
Repair/Replacement of
Microchannel Coil
Microchannel coils are considerably more robust in
design than tube and fi n condenser coils, however they
are not indestructible. When damage or a leak occurs in
the fi eld, it is possible to temporarily repair the coil until
another coil can be ordered.
If the leak is found to be within the tube area of the coil,
a fi eld repair kit (KIT16112) is available through your
local Trane parts center. Because of the all-aluminum
construction and aluminum’s high thermal expansion
rate, a leak located at or on the header assembly cannot
be repaired.