Hydrolevel 3250 - Manual (Page 4)

4
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 MULTIPLE CIRCULATORS
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.
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).
ZONE/
INDIRECT
SWITCH
POSITION
ZONE/
INDIRECT
SWITCH
POSITION
Connect thermostat or end switch from zone relay or multi-
zone panel to T-T. Connect circulator to C2-C1. Move
Zone/Indirect Switch up to Z.
Connect end switch from circulator relay or multi-zone panel to
ZC-ZR. Move Zone/Indirect Switch up to Z.
STEP 3A: HEATING ONLY – No Indirect Water Heater
STEP 3B: HEATING and Indirect Water Heater
SINGLE CIRCULATOR MULTIPLE CIRCULATORS
ZONE/
INDIRECT
SWITCH
POSITION
ZONE/
INDIRECT
SWITCH
POSITION
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.
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