Wiring The Base Plate Terminals; Fuel Burner Hvac - EWC Controls Ultra-Zone IZT-100 Installation Manual

Installing and Wiring the Thermostat

Wiring the Base Plate Terminals

This section describes how to wire the base plate terminals.

Fuel Burner HVAC

Use the instructions in this section and refer to
plate for Fuel Burner HVAC. Refer to the labels you placed on the wires when you
removed the existing thermostat
Table 1
required to support the Single-Stage and Dual-Stage application.
Table 1 Fuel Burner Terminal Conversion Chart
Standard
Terminal
R, RH
RC
C
W, W1
Y, Y1
W2
Y2
G
-
-
a
The 24VAC common must be in the same AC phase as the 24VAC source (RH
or RC). If the thermostat is connected to RH only, or RH and RC then C must be
the RH common. If the thermostat is connected to RC only then C must be the
RC common.
4
Beta Draft Confidential
(page
lists the standard HVAC terminal label and the corresponding EWC label
EWC IZT-100 and IZT-250
Terminal
RH 24VAC source
RC 24VAC source
C
24VAC common
W1 Stage 1 heat relay
Y1 Stage 1 cool relay
W2 Stage 2 heat relay
Y2 Stage 2 cool relay
G Fan relay
S1+ or Contact closure common (IZT-250 only)
CM
H Contact closure, Normally Open or Normally Closed
(IZT-250 only). See
Ultra-Zone Internet Zone Thermostat Installation Guide, Release 1.0
Table 1 and Figure 1
1).
a
Table 7.
Part No. 600-01100-100, Rev. 1
to wire the base