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SPACE HEATINGDHW
(Direct-piped)
Part number 550-100-260/0520
81
ECO
®
Tec
GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
EXPRESS SETUP — EXAMPLE B (continued)
LEGEND
1 ECO
Tec 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, field piped
— MUST be piped to
Boiler In connection
— see Figure 8, page 13
for information.
4 Relief valve piping
to drain.
5 DHW circulator.
6 Isolation valves.
8 Expansion tank.
9 Air separator.
10 Flow/check or spring
check valves.
11 Purge/drain valves.
14 Unions as needed
for service.
15 Return temperature
sensor.
16 Supply temperature
sensor.
20 Make-up water supply.
23 DHW Temperature and
Pressure relief valve
24 Zone circulators.
25
Boiler drain
valve, supplied with
boiler, field piped.
30
Pressure/temperature
gauge, supplied with
boiler, field piped.
31 Outdoor sensor.
33 120VAC power to
boiler — see page 60.
35 Control board
= Items supplied with
boiler — all other Items
supplied by installer.
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