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Installation: Control Wiring
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Installation: Control Wiring
e-Series heat pumps have several contact points for field wiring of external
controls. More contacts can become available with the installation of various
field accessories, and details on those accessories are shown in their respective
installation instructions.
Nyle recommends running enough conductors to use all available contacts if
the installation site would make wire retrofits challenging, even if those contacts
are not intended for use during the initial installation. This allows changes and
reconfiguration to happen seamlessly in the future. Additional conductors to allow
for wire breakage, and/or the addition of future accessories, is also recommended.
The following drawing and notes provide a quick reference of the available
contacts on the base heat pump, and what they are used for. For more advanced
configuration guidance, see the Configuration section of this manual and/or
instructions for any relevant accessories.
All control wiring should follow best practices, local codes and regulations, and
NEC/CSA guidelines.
Do not steal power from powered contacts for external devices. Follow all ratings
and, wire types for the contacts detailed below.
Control Wiring Installation:
1. Identify the smaller, control access conduit in the top of the heat pump.
Remove the shipping plug to access the conduit.
2. Open the electrical enclosure box
3. Run your incoming control wire conduit(s) to the heat pump termination
fitting. Leave sucient exposed wire to fish into the heat pump conduit.
4. Fish the incoming control wires through the conduit until they enter
the enclosure box with enough excess length to reach the appropriate
terminals. Use of a lead wire and/or string may facilitate this process: This
conduit does not have midpoint access.
5. Finish exterior conduit connection to the unit using a weathertight
connection method. Conduits terminate in female thread. See Table 6.
6. Connect power wires to their terminals. All control wire terminals are
located in the upper left of the electrical enclosure box.
7. Close the electrical enclosure box.