Install Room Distribution Unit - Carel SD Installation & Maintenance Manual

Installation & Maintenance Manual

8. Install Room Distribution Unit

Models SD101-313:
If your SD 2000 humidifier was supplied
with a direct mount RDU (Room
Distribution Unit), it will have been
shipped in place, ready to go. Simply
mount the humidifier unit on the wall per
the instructions in Section 2 and
proceed to the unit wiring instructions. If
the RDU was supplied separately or is a
retrofit, mount the RDU to the top of the
humidifier as follows:
1. Connect the steam and condensate
hoses to the outlets on the bottom of the
RDU and secure using the hose clamps
supplied.
2. Slip the hoses and connector wires
through the holes in the top of the
humidifier and line up the 2 corner pins
into the 2 keyed slots on the top of the
humidifier. Push the RDU toward the
back of the humidifier to force the 2
corner pins into the slots.
3. Open the humidifier doors and use the supplied self-tapping
screws to secure the RDU to the top of the humidifier.
4. Connect the steam hose to the top of the cylinder outlet and
secure it with the supplied hose clamp. Run the condensate hose
behind the cylinder on the left side and lay it in the drain pan. Push
the 2 wire spade connectors from the RDU, into the socket located
at the back of the electrical compartment in the humidifier, labeled
X1 and X2 (there is no polarity).
NOTE: If RDU wires are extended, use non-insulated spade
connectors to plug into X1 and X2.
5. OPTIONAL: If the RDU supplied is for remote mounting, then
mount the RDU to the wall on brackets (not supplied) and connect
the steam and condensate hoses in the same way. Extend the
control wires and plug them into the humidifier unit also in the
same way. CAUTION: These wires carry line voltage. Field wiring
must conform to NEC and local codes.
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