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Figure 13: Typical Ring Terminal
If ring terminals or fork terminals are not available, then:
•
Do not terminate different gauge wires to the power
terminal block. (Slack in the wiring will generate heat.)
•
When terminating wires of the same thickness, follow the
instructions demonstrated in the figures below.
Figure 14: Proper & Improper Power Wiring Connections
Figure15: Internal Routing and Terminations in DOAS Units
WARNING
If power wires are not properly terminated and firmly attached,
there is risk of fire, electric shock explosion, physical injury or
death. There is, also, equipment malfunction and property
damage.
•
Never apply line voltage power to the communications
cable terminal block. If contact is made, the PCBs will be
damaged.
•
Always include some allowance in the wiring length when
terminating. Firmly attach the wiring or cable, but provide
some slack to facilitate removing the electrical panels while
servicing, and to prevent external forces from damaging the
terminal block
•
All wiring to the unit must be drawn through one of the pre-
punched holes in the side of the unit casing
•
P
olarity matters. Always connect “A” to “A” and “B” to “B.”
•
Always create a wiring diagram that contains the exact
sequence in which all the indoor units and heat recovery
units are wired in relation to the outdoor unit.
•
Do not include splices or wire nuts in the communication
cable
