User Guide

Zoning with the EVG Control

(continued)

D. Zoning with ZONE VALVES, multiple boilers, suggested applications

(see EVG Boiler Manual for single boiler suggested applications)

WMZV zone valve zone controller plus DHW controlled by boiler, Optional DHW

This suggested application only applies to systems with DHW piped directly to individual boilers. For systems

with DHW connected to the system, other control arrangements may be required.

The wiring shown here will also work for a system as in Typical Application B on page 18. This uses two systems

piped in parallel. If the space heating system pump is turned off, no heat is delivered to the space heating loop.

1. Review wiring information on page 27 (120 VAC

outputs) and page 28 (24 VAC inputs).

2. This application example provides domestic pri-

ority by using the EVG control(s). Space heating

pumps will operate when called on by the zone

controller, but no heat will be delivered to the

system — the boiler circulator will not run during

DHW heating.

3. The conﬁguration at right uses INPUT 2 on any

boiler for space heating with the call for heat com-

ing from the zone controller (X-X).

4. INPUT 1 is connected to a DHW aquastat.

5. This conﬁguration applies to either a local demand

(direct-piped to a single boiler) or a network de-

mand (piped to the main system).

6. Suggested for space heating: Assign INPUT 2 to

either LOCAL PRIORITY 2 (direct) or NETWORK

PRIORITY 2 (system). To set up the priority,

choose the space heating system type that matches

the heating system during the WIZARD setup or

manually in the priority menu.

7. Suggested for DHW: Assign INPUT 1 to LOCAL

PRIORITY 1. Wire the DHW circulator to OUT-

PUT 1. Set the control for boiler pump OFF during

DHW calls.

8. Use the factory default settings for DHW and

for the heating system type chosen, or change if

needed. Factory defaults should work for other

settings not listed above.

P15, P11, and P2 are terminal strips on the EVG control.

Part number 550-100-193/0817

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CONDENSING GAS BOILER — 70/110/155 Advanced Manual