Water Furnace IntelliZone Installation Manual - Electrical Wiring (Cont.)
8
INTELLIZONE INSTALLATION MANUAL
Transformer Sizing
Providing adequate transformer power (VA) to supply the system is an important requirement. Each IntelliZone 3-wire
damper requires 3.0 VA at nominal voltage. Each IntelliZone 2-wire damper requires 7.0 VA at nominal voltage. The stan-
dard transformer available is a 75VA with circuit breaker (Part # ZTK240).
Mount the transformer onto the side of the unit’s control box by inserting and tightening screws (provided) into the pre-
punched holes. Thread all transformer wires through the hole with bushing and follow the wiring schematic for connecting
the transformer primary leads as shown in Figure 15 below.
For 208 volt operation, the red and blue transformer wires must be switched. Follow the wiring schematic in Figure 16 on
page 11 for the secondary side of the transformer. Use wire nuts only for connections to thermostat wire.
Electrical Wiring (cont.)
WARNING: All wiring must comply with local and state codes. Disconnect the power supply before beginning to
wire to prevent electrical shock or equipment damage.
Figure 15: Mounting Transformer to Control Box (E Series shown)
Transformer 'VA' Calculation (3-wire actuator)
Zone 1 dampers Power to 2 IntelliZone Damper
6.0 VA
Zone 2 dampers Power to 1 IntelliZone Damper
3.0 VA
Zone 3 dampers Power to 2 IntelliZone Damper
6.0 VA
Zone 4 dampers Power to 3 IntelliZone Damper 9.0 VA
Total VA Draw
2 4 VA
IntelliZone
transformer
(Mount with
wires pointing up)
Wrap end of unused
transformer wire with
electrical tape and
secure inside the
control box away
from other electrical
terminals
SW 3-2 must be set to OFF
(Zone) on logic board when
used with zone control system.
Connect IntelliZone
transformer primary leads
to “A” and“C” on the
terminal block for proper
operation.