17
Connect thermostat or end switch from zone relay or multi-zone panel
to
T-T.
Connect circulator to
C2-C1.
Connect end switch from indirect
zone relay to
ZC-ZR.
Move Zone/Indirect Switch down to
I.
SINGLE CIRCULATOR
ZONE/
INDIRECT
SWITCH
POSITION
Connect end switch from heating circulator relays or multi-zone panel
to
T-T.
Connect end switch from indirect circulator relay to
ZC-ZR.
Move Zone/Indirect Switch to
I.
MULTIPLE CIRCULATORS
ZONE/
INDIRECT
SWITCH
POSITION
HEATING and Indirect Water Heater
NOTE: The wire from
ZR
to the hot terminal of the indirect circulator will ensure that
indirect calls will fire to limit and receive priority over heating calls.
MULTIPLE CIRCULATORS — Typical Zone Panel with Priority Zone
ZONE/
INDIRECT
SWITCH
POSITION
IMPORTANT:
When installing with an indirect water heater, the Zone/Indirect Switch must be set in the
I
position. When set in the
I
position, calls to
ZC-ZR
will bypass
the Thermal Targeting feature and allow the boiler to fire to the high limit setting to heat the indirect tank. The indirect signal must be separate from all heating zone
signals. If you choose not to separate the indirect signal from the heating zones, the Economy Feature should be turned OFF to ensure that the boiler supplies
adequate temperature to heat the indirect tank (see page 7).
CHOOSE FROM
THROUGH
BELOW
Summary of Contents for Cast Iron Boiler Series
Page 26: ...26 10 3 HYDROSTAT 3250 CONTROL Setting the control...
Page 27: ...27...
Page 30: ...30 12 0 EXPLODED PARTS VIEW...
