LAARS EDN Series - Installation, Operation and Maintenance Instructions User Manual
Page 14
Page 14
LAARS HEATING SYSTEMS
Figure 23. Multiple Zones with Three Wire Zone Valves (Requires Isolation Relay).
Figure 24. Multiple Zones with Circulators and Room Thermostats.
NOTE: This wiring is NOT the same
as shown by valve manufacturer.
below 39°F (4°C). If this condition is recognized, the
Endurance pump will run for 5 minutes, or until the
boiler outlet temperature reaches 45°F (7°C). If the
boiler outlet temperature remains below 45°F (7°C) for
5 minutes, the appliance will start its ignition
sequence, in hopes of firing the boiler and heating the
Figure 25. Wiring for Single Zone Power Stealing Type Clock Thermostats That Require 24 VAC.
NOTE: This wiring required only for
single zone applications utilizing clock
thermostats requiring 24 volt power
supply.
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