OR:ONE
SPACE HEATING
#IRCULATORSWITHOUTCIRCULATORRELAYS \
DHW
(Direct-piped)
Part number 550-100-260/0520
81
ECO
®
Tec
G
AS
-
FIRED
WATER
BOILER
–
80/110/150/199
B
OILER
M
ANUAL
EXPRESS SETUP —
E
XAMPLE
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.