Crown Mega-Stor 2 Installation Manual

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B. ZONE VALVES
Figure 6.2 is a connections diagram for a zone system using Honeywell V8043F motorized zone valves. The motor on these
valves is connected between TH and TR. TH/TR is provided for the electrician’s convenience as a binding post and is connected
to nothing inside the valve. The “end switch” terminals are connected to a set of switch contacts inside the valve which become
made when the
valve is open.
A call for heat from any thermostat or the IWH aquastat results in the application of 24 volts across the motor in that zone’s zone
valve. This drives open the zone valve. When the valve has opened, the endswitch in that zone valve makes and brings on the
boiler.
FIGURE 6.2: ZONE VALVE WIRING
WARNING
•
Regardless of the control system selected, the L4080B on the indirect water heater must be the only
control that will permit boiler water to ow through the indirect water heater.
•
Use of other temperature controls in place of the L4080B supplied with this indirect water heater
could result in personal injury or death due to scalding.
C. ZONE PANELS
Consult the zone panel manufacturer’s instructions for proper indirect water heater wiring.