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Field wiring (continued)
&IGURE ECO LINEVOLTAGE input and output connections (120
VAC)
/UTPUTCIRCUITSARE6!#)FANOUTPUTISTOOPERATE
ALOWVOLTAGECIRCUITUSEANISOLATIONRELAY
#)2#5,!4/20/7%2 — 4HEMAXIMUMALLOWABLE
CURRENTFOREACHCIRCULATORISAMPSAT6!#.
For circulators with higher amp ratings, you must install
a circulator relay or starter to provide line voltage to the
circulator. For circulators rated over 2.2 amps, connect
only the circulator relay or starter coil to the ECO cir-
culator terminals.
7)2).').&/2-!4)/. — See Figure 62, page 56 for
wiring connection locations. See Figure 66, page 60
for the complete schematic wiring diagram. See
Figure 67, page 61 for the complete ladder wiring
diagram.
Line voltage wiring (120 VAC)
Make the following line-voltage connections, some
of which depend on your system and how the ECO
control will be programmed. The callouts below refer
to Figure 64.
P1 6!#0OWERINPUT
1. Provide and install a fused disconnect or service
switch (15-ampere rated recommended) as re-
quired by applicable codes.
1. Connect minimum
AMPERE 6!# power
wiring to
green, 3-pin terminal block as shown in
Figure 64.
2. If possible, provide a surge suppressor in the supply
power line. This will reduce the possibilities of ECO
control damage due to line surges.
3. Must wire ground to this terminal to provide boiler
grounding.
P2 $(7#IRCULATOR/UTPUT6!#PINS
1. The ECO boiler control provides dedicated 120-
VAC outputs for one DHW zone (priority) and
one heating zone.
2. Control setup requires that DHW tank be con-
trolled from DHW Input/Output terminals to
ensure post-pumping functionality.
Always connect the DHW circulator to
the DHW Circ. Output to ensure post-
pumping functionality.
3. DHW Circ. Output cannot be used to control a
central heating zone. It bypasses the outdoor reset
function.
P2 (%!4#IRCULATOR/UTPUT6!#PINS
258
1. Control setup requires this output to:
a. Provide 120VAC to a system circulator (such as
on a zone valve system with system circulator).
b. Provide 120VAC to a boiler loop circulator (in
primary/secondary piping).
c. Provide post-pumping functionality (built
in to ECO control) to prevent lockout due to
temperature over shoot.
Always connect the system circulator
(direct connect) or boiler circulator
(primary/secondary) to the HEAT Circ.
Output to ensure post-pumping func-
tionality.
2. The ECO control will activate HEAT Circ. Output
if the Heat thermostat or input device calls for heat,
after DHW heating (if used) is satisfied.
Part number 550-142-122/0513
58
TM
GAS-FIRED WATER BOILER — Boiler Manual
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