Ductwork
When installing ductwork, adhere to local codes and sensible practice. Minimize duct runs and
avoid abrupt changes in direction where possible. Allow ample access space for servicing of the
coils and changing of filters. Perform regular maintenance on ducts to increase unit life, maintain
efficient operation, and reduce accumulation of explosive dust. Refer to blower performance charts
and engineer duct runs and accessory pressure drop so as not to exceed maximum external static
values.
Canvas or other types of flexible collars are recommended for connecting the air ducts to the unit.
The supply air duct collar can be connected directly to the blower outlet flanges. Return air may be
ducted to the unit, or drawn directly from the conditioned space (with optional return air grille).
If a ducted return is desired, duct connection flanges may be secured directly to the air intake
opening; filters are accessible from either the left-hand or right-hand side.
Note:
The Manufacturer will not accept any liability resulting from incorrect instal-lation of
this equipment. Follow instal-lation instructions carefully.
Evaporator blower discharge conversion
All models can be field converted to the alternate evaporator discharge orientation, as indicated on
the unit dimensional drawings. However, it is not recommended to convert the blower discharge
for the 25-ton models due to the size of the blower deck.
For the 5–15 ton models only, the removable upper blower section can be rotated 180° for top rear
discharge applications (see below). The blower outlet panel may be interchanged with the front
panel of the fan module. Interchanging these two panels allows horizontal fan discharge to either
front or rear of the unit.
The procedure for converting the fan discharge from vertical to horizontal is similar on all models.
1. Remove blower drive belt on all models with base mounted motors. Remove the complete
fan motor and drive on models with blower mounted motor assemblies.
2. Remove the panel attachment screws on the alternate location access panel (front blower
module panel). The front roof support angle must be removed to allow access to the front
panel. Remove the panel and set aside.
3. Remove the panel attachments screws on the blower outlet mounting panel.
Do not remove
fasteners securing blowers to panel!
The blowers are to remain attached to the mounting
panel at all times.
4. Carefully remove the blower panel assembly from the evaporator cabinet. Do not allow
blower housings to contact the evaporator coil during the removal. On some models, the
housing(s) will have to be "rotated" to exit through the panel opening.
5. Interchange the blower panel assembly with the position of the alternate access panel.
Exercise care in locating the panel. Do not allow blower housings to contact the evaporator
coil. Install the attachment screws and tighten securely.
6. Install the blank access panel into the remaining evaporator opening. Fasten securely.
7. Relocate the evaporator fan drive motor to the alternate location.
8. Install and adjust drive belts to appropriate tension. Test run blower and observe operation
for unusual sounds or vibration.
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C-Series Vertical (CSV) Water-Cooled Self-Contained Units, B Generation, R-410A Installation, Operation, and
Maintenance Manual
