Install Instructions

Part number 550-100-131/0715
– 45 –
™
GAS-FIRED WATER BOILER — Boiler Manual
DHW as a zone — CIRCULATOR zoning
primary/secondary
See Figure 53.
1. Install a separate circulator for each zone.
2. Install the DHW tank as a system zone. The DHW tank can
be piped as a zone ONLY if a DHW tank is ./4 connected
to the boiler.
3. Wire the DHW circulator to boiler Priority 1. Set the boiler
circulator to ON in the DHW Settings menu.
4. DHW Priority operation—The Control turns off space heating
to the HEAT zones during domestic water heating calls on the
DHW input. The MAX ON TIME setting can be adjusted to
limit how long this occurs. Set the MAX ON TIME to “0” to
disable domestic priority.
5. Install a separate circulator (supplied by installer) for each
zone capable of delivering the proper flow and head as
shown.
Use ATLEAST the -).)-5- pipe size shown in
Figure 44, page 37 on all boiler loop piping (con-
necting boiler to and from the primary/second-
ary connection, item 14). 5SE ONLY PRIMARY
SECONDARYPIPINGASSHOWN Failure to follow
these guidelines could result in system problems.
Expansion Tank required
1. Provide a system expansion tank following the guidelines on
page 40.
2. DO NOT use a closed-type tank if connecting to a water heater
that is equipped with an automatic vent.
Overriding the Outdoor Reset function by setting
control to DHW mode when system is intended for
space heating may violate Section 303 of the 2007
Energy Act. See page 127 for compliance informa-
tion and exemptions.
Controlling the circulators
1. The control can control up to four circulators (boiler circulator
and three others). Refer to Field wiring, beginning on page 50,
for instructions on wiring to circulators.
2. The factory default settings are: all three inputs are set up for
Space Heating (
Priority 2). Each input correlates to its re-
spective circulator output. For DHW applications, set Input
1 to Priority 1. See Field wiring instructions, beginning on
page 50, for details.
&IGURE Circulator zoning with DHW as a zone
,EGEND&IGURE
 Evergreen boiler
 Indirect water heater, if used

Relief valve, supplied with
boiler, field piped — MUST
be piped to boiler supply
connection — see page 37 for
information.
 Relief valve piping to drain —
see page 39.
 DHW circulator.
 Isolation valves.
 Supplementary expansion
tank, diaphragm type, if used.
 Air separator.
 Flow/check valves or spring check.
 Purge/drain valves (one drain
valve is supplied loose with the
boiler).
 Boiler circulator.
14 Primary/secondary connection (tees
no more than 12 inches apart)
 Make-up water supply.
 High limit temperature control.
 Backflow preventer, if used.
 Zone circulators.
 Pressure reducing valve, if
used.
 Pressure/temperature
gauge, supplied with boiler,
field piped.
 Quick-fill valve, if used.
 Heating circuits.
 Additional heating circuits, if
any.
31 System supply and return
sensors: Strap system sen-
sors to lines as shown, at
least 6 pipe diameters (but
no more than 3 feet) from
boiler connection tees.
 = Items supplied with boiler
— all other items supplied by
installer.
3. For more than 3-zones, use Weil-McLain WMCR zone
Circ controller. See EVG Advanced Manual for proper wiring.
4. For optimized performance, In DHW priority settings
(Priority 1), change target modulation sensor from Boiler Out
to System Supply.
System piping - Single Boiler Systems (continued)
See Advanced Manual for Multiple Boiler Systems
-).)-5-
Boiler loop pipe size
Evergreen 220
Evergreen 299/300, 399
1¼”
1½”
See CAUTION at left.