Hvac Staging Connections; Figure 5: Existing Ez Zone Hvac Wiring; Figure 6: New Meridian Hvac Wiring - York EZ Zone Upgrade Manual

EZ Zone/Meridian

HVAC Staging Connections

Figure5 below shows the EZ Zone Master Controller
wiring. Figure 6 below depicts the wiring schematic
that should be used for wiring of all Meridian Zone
Managers boards. As can be seen below, the Meridian
24 VAC - R
Fan - G
Cool - Y1
Cool - Y2
Heat - W1
Heat - W2

Figure 5: Existing EZ Zone HVAC Wiring

24 VAC -R
Fan - G
Cool - Y1
Cool - Y2
Heat - W1
Heat - W2

Figure 6: New Meridian HVAC Wiring

20
Zone Manager wiring is much simpler than the EZ Zone
Master Controller wiring. Be sure to pay strict atten-
tion to all warnings and cautions listed on the sche-
matic.
OUT1
FAN
OUT2
COOL1
OUT3
COOL2
OUT4
HEAT1
OUT5
HEAT2
R
FAN
COOL1
COOL2
HEAT1
HEAT2
036-21423-001 Rev. A (0602)
The EZ Zone Master Con-
troller relay outputs consist
of a series of five double pole
terminal blocks. Wire jump-
ers between terminal blocks
are required to the common
of each relay.
The Meridian Zone Manager
wiring has been simplified.
There is only one terminal
block with connections
clearly marked for ease of in-
stallation. Jumpers are no
longer required since the
commons are tied together
within the circuit board.
Upgrade