Installation

Connecting DC Wiring

Fuse requirements

The combiner board in the Sun Tie XR accepts up to six individual PV

 

array circuits (positive and negative wires). Each circuit on the combiner

 

board contains a fuse to protect against over-current. Always replace this

 

fuse with one of the same type and rating (GBB, 20 amp maximum,

 

ceramic type, 0.25" x 1.25"). The combiner board is rated for 100 amps

 

maximum input.

Combiner board

The combiner board PV array input connection block is located in the

location

lower left-hand section of the Sun Tie XR unit.

Wiring procedure

Before connecting DC wiring, refer to Figure 2-10.

PV array wiring to

terminal block

+

(note polarity)

 

 

–

PVGFP (ganged)

100 amp DC breaker

PVGFP (ganged) 1 amp DC breaker

PV array

100 amp DC breaker

L1 15 amp AC breaker (ganged)

L2 15 amp AC breaker (ganged)

L2 breaker AC

connection

L1 breaker AC connection

Ground bar

Figure 2-10 Electrical component location and PV array DC connection points

To wire the PV array to Sun Tie XR:

1.Install the DC conduit from the PV arrays to the bottom of the

Sun Tie XR, through one of the knockout holes, as shown in Figure 2- 9. Metal conduit is highly recommended.

2.Route the wires from the PV array(s) through the conduit and into the lower section of the Sun Tie XR enclosure, as shown in Figure 2-8.

Note: If you are using more than one PV sub-array, label the positive and negative wire pairs appropriately (such as PV 1, PV 2, and so on).

3.Connect the positive (+) wire from the #1 array to the PV PLUS 1 terminal on the combiner board. Check that the wire is in the proper location and tighten the screw.

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