Coil Winterization - Trane Climate Changer T Series Installation Operation & Maintenance

Routine Maintenance
12. Replace all panels and parts and restore electrical power to the unit.
13. Be careful any contaminated material does not contact other areas of the unit or

Coil Winterization

Water coil winterization procedures consist primarily of draining water from the coil
before the heating season. Trane recommends flushing the coil with glycol if coils will
be exposed to temperatures below 35 degrees.
CAUTION
Coil Freezeup!
Properly drain and vent coils when not in use. Trane recommends glycol protection in
all possible freezing applications. Use a glycol approved for use with commercial
cooling and heating systems and copper tube coils. Failure to do so may result in
equipment damage.
Install field-fitted drains and vents to permit winterization of coils not in use and to assist
in evacuating air from the water system during startup. If draining is questionable
because of dirt or scale deposits inside the coil, fill the coil with glycol before the heating
season begins.
Individual coil types determine how to properly winterize the coil. To determine the coil
type find the "Service Model No of Coil" on the coil section nameplate. The coil type is
designated by the second and third digits on that model number. For example, if the
model number begins with "DUWB, " the coil type is UW; if the model number begins
with "DW0B, " the coil type is W.
Note: On many unit sizes, there are multiple coils in the coil section. Be sure to winterize
Type UW, UU, W, P2, P4, P8, WD, 5D, and 5W Coils
Note: Use care in removing header plugs from Type P2, P4, and P8 coils. Over-torquing
1. Remove the vent and drain plugs.
2. Blow the coil out as completely as possible with compressed air.
3. Fill and drain the coil several times with full strength glycol so that it mixes thoroughly
4. Drain the coil out as completely as possible.
5. To ensure no water remains in the coil, do not replace the vent and drain plugs until
94
building. Properly dispose of all contaminated materials and cleaning solution.
all coils in a given coil section.
may result in twisted tubes.
with the water retained in the coil.
the coils are put back into service.
T-Series Climate Changer Air Handler IOM • CLCH-SVX06A-EN