Weil-McLain EcoTec 80 Manual page 71

G -
®
ECO Tec
AS FIRED WATER BOILER
Zoning with the ECO Tec Control
Combi models use Input/Output pairs 1 and 4 for 3-way valve operation and cannot be used for any
other purpose. Use Input 2 for Indirect DHW and Input 3 for Spacing Heating applications.
B. Zoning with ZONE VALVES, suggested applications
1. Review wiring information on page 60 (120VAC
outputs) and page 61 (24VAC inputs).
2. The configuration at right uses INPUT 2, 3, and 4 for
space heating thermostats. INPUT 1 is reserved here
for configuring the operation of the system circulator.
3. System Settings 2, 3 and 4 to PRIORITY 2. To set up
PRIORITY 2, choose the space heating system type
that matches the heating system during the WIZARD
setup or manually in the PRIORITY 2 menu in the
System Settings menu.
4. Use the factory default settings for the heating system
type chosen, or change if needed.
5. Assign INPUT 1 (Input 2 for Combi models )to AUX
PUMP/OUTPUT. Then select INPUTS PRIORITY
SETTING when prompted for when to activate the
output. This will cause the system pump to run
when either of the zones calls for heat. Confirm that
Priority 2 RUN AUX PUMP/OUT is set to YES.
6. INPUT 1, J17-1/2, (Input 2, J17-4/5 for Combi
models) cannot be used for a wired connection
because it is being used in the control setup to run
the system circulator.
The system must be equipped with a by-pass
pressure regulating valve. Flow can occur
with zone valves closed.
Part number 550-100-260/0520
–
80/110/150/199
B M
OILER ANUAL
(continued)
71