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Installation and Configuration
14
6.3 Connect Input/Output Power
The UPS ships with the basic hardwire box attached. If an
optional model is to be used, remove the standard box and
install the optional box using the three captive mounting
screws marked in the illustration, below, right.
6.3.1 Replacing a power distribution box
Whenever a power distribution box is not attached to a UPS,
the cover must be slid over the electrical connectors to prevent
damage or injury.
1. On the power distribution box attached to the UPS,
locate the three captive mounting screws holding the box
to the UPS (see illustration above, right).
2. Turn the screws until the box can be pulled away from the
UPS. Exercise care to avoid removing screws from the
hardwire box.
3. On the replacement power distribution box to be
attached to the UPS, loosen the cover over the electrical
connectors by backing out the three screws one turn each.
4. Slide the cover open to expose the electrical connectors.
5. Gently retighten the three screws loosened in Step 3.
6. Align the connectors on the box and UPS.
7. Push the box into place.
8. Holding the box firmly against the UPS, tighten the three
captive mounting screws until the box is secure. Do not
overtighten.
6.3.2 Distribution Box Electrical Connections
Electrical connections are made through a removable power distribution box that attaches to the rear
of the UPS.
The installer must provide a 30A branch circuit breaker. The input circuit breaker on the distribution
box and the output circuit breaker on the rear fixed-panel of the UPS disconnect all power between
the main cabinet and the distribution box.
Models equipped with a manual bypass switch pass utility power directly to the bypass switch from
the input terminal block. The input circuit breaker on the distribution box does not disconnect power
from the manual bypass switch.
Figure 3 30A branch circuit breaker connection diagram
DISCONNECT BYPASS POWER TO
THE MANUAL BYPASS SWITCH.
Mounting screws
for removable box
Slide
cover
over
connec-
tors
Loosen screws
to move cover
PD-HDWR Distribution Box PD-HDWR-MBS Distribution Box
Utility Utility
Input
Input
Output
Output
30A External
Branch Circuit
Breaker
30A External
Branch Circuit
Breaker
30A Input
Circuit
Breaker
30A UPS Output
Circuit Breaker
30A UPS Output
Circuit Breaker
30A Input
Circuit
Breaker
Byp
Inv
UPS - PFC, Battery, Inverter UPS - PFC, Battery, Inverter