Weil-McLain EcoTec 80 - Page 83

-ULTIZONESPACE HEATING:ONEVALVES\DHW
(Direct-piped)

Part number 550-100-260/0520
83
ECO
®
Tec GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
EXPRESS SETUP — EXAMPLE C (continued)
LEGEND
 ECO Tec 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 In connection
— see Figure 8, page 13
for information.
 Relief valve piping
to drain.
 DHW circulator.
 Isolation valves.
 System circulator.
 Expansion tank.
 Air separator.
 Flow/check or spring
check valves.
 Purge/drain valves.

Boiler circulator,
supplied with boiler,
field piped.
 Zone valves.
 Unions as needed
for service.
 Return temperature
sensor.
 Supply temperature
sensor.
 Make-up water supply.
 By-pass pressure
regulator, REQUIRED
for zone valve systems.
DHW Temperature and
Pressure relief valve

Boiler drain
valve, supplied with
boiler, field piped.

Pressure/temperature
gauge, supplied with
boiler, field piped.
 Outdoor sensor.
 Low water cut-off.
 120VAC power to
boiler — see page 60.
 Control module.
 = Items supplied with
boiler — all other Items
supplied by installer.