Install Instructions

Part number 550-100-260/0520
79
ECO
®
Tec GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
EXPRESS SETUP — Example A (continued)
-ULTIZONESPACE HEATING#IRCULATORSWITHCIRCULATORRELAYS\DHW
(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.