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Part number 550-100-260/0520
79
ECO
®
Tec
GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
EXPRESS SETUP — Example A (continued)
SPACE HEATINGDHW
(Direct-piped)
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.
Expansion tank.
Air separator.
Flow/check or spring
check valves.
Purge/drain valves.
Unions as needed
for service.
Return temperature
sensor.
Supply temperature
sensor.
Make-up water supply.
DHW Temperature and
Pressure relief valve
Zone circulators.
Boiler drain
valve, supplied with
boiler, field piped.
Pressure/temperature
gauge, supplied with
boiler, field piped.
Outdoor sensor.
120VAC power to
boiler — see page 60.
Control module.
= Items supplied with
boiler — all other Items
supplied by installer.
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