Weil-McLain Evergreen 220 User Manual page 71

™ GAS
EXPRESS SETUP — E
SPACE HEATING
Part number 550-100-131/0715
-
FIRED WATER BOILER
— Boiler Manual
C
XAMPLE
(continued)
Evergreen boiler.
Indirect water heater, if
used (domestic water
piping not shown) —
MUST be direct piped
to boiler to use default
control settings.
Relief valve, supplied
with boiler, field piped
— MUST be piped to
boiler supply connection
— see Figure 6, page 11
for information.
Relief valve pip-
ing to drain.
DHW circulator.
Isolation valves.
System circulator.
Expansion tank.
Air separator.
Flow/check or spring
check valves.
Purge/drain valves.
Boiler circula-
tor, supplied with
boiler, field piped.
DHW (Direct-piped)
Zone valves.
Unions as needed
for service.
Return tempera-
ture sensor.
Supply tempera-
ture sensor.
Make-up water supply.
By-pass pressure
regulator, REQUIRED
for zone valve systems.
Boiler drain
valve, supplied with
boiler, field piped.
Pressure/temperature
gauge, supplied with
boiler, field piped.
Outdoor sensor.
Low water cut-off, if used
120VAC power to
boiler — see page 51.
EVG Control module.
= Items supplied with
boiler — all other items
supplied by installer.
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