2-1
BOILER SYSTEMS AND OPERATION
DC SERIES BOILERS / WATER HEATERS
DC 15-95, DC 15-96, DC 20-125, DC 33-160
2.0 BOILER / WATER HEATER
SYSTEMS AND OPERATION
GENERAL
The DC series modulating condensing boilers / water heaters are designed to heat
both your indoor space and your domestic hot water. The boiler / water heater’s
unique heat exchanger design incorporates separate copper water ways for space
heating and for domestic hot water generation.
The boiler / water heater’s control is equipped to provide outdoor reset control for
the space heating load and also can provide a set-point water temperature for the
space heating load. Installing the outdoor sensor is optional but recommended for
additional efficiency.
The boiler / water heater is equipped with a factory installed pump. The pump is
pre-wired and will operate with any call for space heating and when heating an IBC
indirect water heater. The pump will not operate with a call for domestic hot water
using the internal domestic hot water tankless coil.
The boiler / water heater pump will operate for 10 seconds every 24 hours to help
prevent pump from seizing. The pump will be energized 24 hours after the last call
for heat and every 24 hours after that until the next call for heat.
The DC series boiler / water heater can generate domestic hot water in several
ways. The DC series boiler / water heater can be used as a tankless water heater
with or without a storage tank and also with an IBC indirect water heater.
The boiler / water heater is equipped with an electronic controller, which ignites
the burner and continuously monitors the flame throughout each call for heat. The
control also displays the current operating conditions of the boiler / water heater
and any error messages should a problem occur.
The boiler / water heater’s controller also provides frost protection. When the boiler
/ water heater’s heat exchanger becomes too cold the burner switches on to keep
the heat exchanger warm. Please ensure that the condensate trap is protected from
freezing. The boiler / water heater must be installed indoors in a heated space.
2.1
BURN
HOT
DANGER
°
Water temperture over 125°F (52°C) can cause severe burns instantly
or death from scalds.
°
Children, disabled, and elderly are at highest risk of being scalded.
°
See instruction manual before setting temperature at boiler.
°
Feel water before bathing or showering.
°
Temperature limiting valves are available, see manual.
