Weil-McLain Evergreen EVG 70 Manual page 77

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EXPRESS SETUP — Example C (continued)
Multi-zone SPACE HEATING (Zone valves + WMZV controller) | DHW (Direct-piped)
Part number 550-100-191/0917
as-fired water boiler — Boiler Manual
70/110/155
1 Evergreen boiler.
2 Indirect water heater, if
used (domestic water
piping not shown) —
MUST be direct piped
to boiler to use default
control settings.
3 Relief valve, supplied
with boiler, fi eld piped
— MUST be piped to
boiler supply connection
— see Figure 8, page 14
for information.
4 Relief valve piping
to drain.
5 DHW circulator.
6 Isolation valves.
7 System circulator.
8 Expansion tank.
9 Air separator.
10 Flow/check or spring
check valves.
11 Purge/drain valves.
12
Boiler circulator,
supplied with boiler,
fi eld piped.
13 Zone valves.
14 Unions as needed
for service.
15 Return temperature
sensor.
16 Supply temperature
sensor.
20 Make-up water supply.
21 By-pass pressure
regulator, REQUIRED
for zone valve systems.
23 DHW Temperature and
Pressure relief valve
25 Boiler drain
valve, supplied with
boiler, fi eld piped.
30 Pressure/temperature
gauge, supplied with
boiler, fi eld piped.
31 Outdoor sensor.
32 Low water cut-off.
33 120VAC power to
boiler — see page 56 .
35 EVG Control module.
= Items supplied with
boiler — all other items
supplied by installer.
77