SPYDER MODEL 7 VAV CONTROLLER INSTALLATION INSTRUCTIONS
31-00475-01 16
INPUT / OUTPUT WIRING
Wiring Requirements
NOTE:
When attaching two or more wires to the same terminal, other than 14 AWG (2.0 mm
2
), be sure to twist them
together. Deviation from this rule can result in improper electrical contact, see Fig. 15.
Each terminal can accommodate the following gauge of wire:
• Single wire: From 22 AWG (0.3 mm
2
) to 18 AWG (1 mm
2
) solid or stranded
• Multiple wires: Up to two 18 AWG (1 mm
2
) stranded, with 1/4 watt wire-wound resistor
• Prepare wiring for the terminal blocks, as follows:
• Strip 1/2 in. (13 mm) insulation from the conductor.
• Cut a single wire to 3/16 in. (5 mm). Insert the wire in the required terminal location and tighten the screw.
• If two or more wires are being inserted into one terminal location, twist the wires together with a minimum of
three turns before inserting them, see Fig. 15.
• Cut the twisted end of the wires to 3/16 in. (5 mm) before inserting them into the terminal and tightening the
screw.
• Pull-on each wire in all terminals to check for good mechanical connection.
NOTE:
Do not over-tighten the terminal screws to avoid deformation and damage to the terminal block. The maxi-
mum torque for the terminal screws is 4.4 in-lb (0.5 Nm).
Fig. 15 Attaching Two or More Wires at Terminal Block
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