5
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
ZONE/
INDIRECT
SWITCH
POSITION
SINGLE CIRCULATOR — Multiple Zone Valves including Indirect, No Zone Control Panel
STEP 3B: HEATING and Indirect Water Heater – continued
NOTE: For proper operation of the boiler reset function, all heating thermostats must input to T-T or ZC-ZR terminals as indicated below.
Jumping the T-T terminals and wiring the thermostat to the primary will override the economy feature.
WIRING
WARNING
Electrical shock hazard. To prevent electrical shock, death or equipment damage, disconnect power supply before
installing or servicing this control.
MORE
NOTE: When using zone valves for both heat and indirect, the calls must be separated in order to prioritize indirect calls. This can
be accomplished by using a general purpose relay as shown above. However, for ease of installation, a zone control panel is rec-
ommended (see wiring diagram 7 on next page).
HydroStat 3250-Plus Instructions: HydroStat Instructions.8pg 11/14/13 3:43 PM Page 5
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