Circulator Zoning - Multiple Temperature Zones With Primary/Secondary - Freestyle 80 Manual

®
W
FreeStyle
ALL
17 Primary/Secondary System Piping
Circulator zoning – Multiple
temperature zones with
secondary
(Shown with optional DHW piping)
See Figure 50
.
1.
high- and low- temperature heating zones using a
mary system loop. Systems zoned with circulators must
pipe the boiler loop as a secondary circuit as shown.
2.
head as shown.
Expansion Tank required
1.
lines on pages 37 or 39.
2. DO NOT
that is equipped with an automatic vent.
System setup and settings
1.
coils, or heat exchangers.
For cast iron radiation and old black iron pip-
ing systems a "Dirt separator with a magnet"
must be installed on the return piping to
protect the boiler heat exchanger.
Figure 50, item 28) to help ensure
supply water temperature will not exceed the maximum
3. Heating zone supply water temperature settings should
regulates supply temperature to the lower-temp zones.
tions, parameter P02 ( page 91) may be set
temperature.
Domestic Hot Water (DHW) tank, if used
1.
2.
NOT already connected to the
boiler.
To provide DHW priority operation, use a zone
controller. See notices on page 51 to ensure compliance
3. DHW Priority operation—The FreeStyle® control
domestic priority. See page 65
4. NOT connecting an indirect water heater, do not
use the DHW input or DHW Circulator output on the
FreeStyle® control.
Part number 550-142-850/0716
M -
OUNT GAS FIRED WATER BOILER
primary/
-
-
coil only applica-
-
—
Boiler Manual
(continued)
Figure 50
DHW applications may violate Section 303 of the 2007
Energy Act. See page 127
exemptions.
Wiring the Indirect tank aquastat to the Heating Only
Controlling the Zones
1. The FreeStyle® control can be used to control space heating only,
domestic water heating only, or both.
2. The boiler and circulators can also be operated by a zone control-
ler and in some installations may be needed.
(See Note,
page 39)
43