Laars FT Series - Product Flow Paths; Central Heating Water Flow; Domestic Hot Water Flow

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CH Supply
CH Return
Combustion Air
Central Heating Mode Domestic Hot Water Mode
Vent VentCombustion Air
GAS INPUT GAS INPUT
DHW SUPPLY
DHW Return
DHW Recirculation
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2.5 Names of Components
2.5.1 Central Heating ow. Combination Boiler Heating Mode.
Water in the heating system ows through the low loss header (LLH); boiler pump heats water in the
boiler and is circulated through LLH. System pump or individual zone pumps are required to pull heated
water from CH supply connection and return water to CH return connection.
2.5.2 Domestic Hot Water ow. Combination Boiler Domestic Hot Water Mode.
Cold DHW ows into the coil and is heated by boiler pump as it circulates water between boiler and
LLH. DHW priority is achieved through wiring heating zones via the CH pump output terminals. See
section 4.19 for wiring.