Slant/Fin EM-10 Service Manual - Manual (Page 5)

5 EM-40-SM Service Manual
MODE 3
(Dedicated Domestic Hot Water Tank)
Mode 3 is designed for heating a dedicated domestic hot
water tank using parallel piping. A tank sensor creates an
internal heat demand in the control. Once an internal heat
demand is present, the control stages the boiler to
maintain the boiler target temperature at the boiler outlet
sensor. Refer to section C for a description of dedicated
domestic hot water tank operation.
MODE 4
(Outdoor Reset and Setpoint with Parallel Piping)
Mode 4 is designed for outdoor reset and setpoint oper-
ation using parallel piping. The heat demand is available
to provide outdoor reset for space heating systems. The
setpoint can be used to heat an indirect domestic hot
water tank.
Once a heat demand is present, the control stages the
boiler to maintain the calculated outdoor reset target at
the boiler outlet sensor. Refer to section D for a descrip-
tion of outdoor reset operation.
Once a setpoint demand is present, the control stages
the boiler to maintain the boiler target at the boiler out-
let sensor. If both demands are present at the same
time, the control targets the higher of the two require-
ments. Refer to section B for a description of setpoint
operation.
MODE 5 (Outdoor Reset and Setpoint with Primary/
Secondary Piping)
Mode 5 is designed for outdoor reset and setpoint operation
using primary / secondary piping. The heat demand is
available to provide outdoor reset for space heating systems.
The setpoint demand can be used to heat an indirect
domestic hot water tank.
Once a heat demand is present, the control stages the
boiler to maintain the calculated outdoor reset target at the
boiler supply sensor. Refer to section D for a description of
outdoor reset operation.
Once a setpoint demand is present, the control stages the
boiler to maintain the boiler target at the boiler supply
sensor. If both demands are present at the same time, the
control targets the higher of the two requirements. Refer to
section B for a description of setpoint operation.
MODE 6 (External Target Temperature Input and Setpoint
with Parallel Piping)
Mode 6 is designed for an external input signal and setpoint
with parallel piping. The external input signal can be
provided from a BMS, an EMS, or a tekmar tN4 System
Control for space heating. The setpoint can be used to heat
an indirect domestic hot water tank.
The external input signal creates an internal demand and
changes the boiler target according to a linear scale. The
control stages the boiler to maintain the boiler target at the
boiler outlet sensor. Refer to section E for a description of
external target temperature operation.
Once a setpoint demand is present, the control stages the
boiler to maintain the boiler target at the boiler outlet
sensor. If both an external input signal and a setpoint
demand are present at the same time, the control targets
the higher of the two requirements. Refer to section B for
a description of setpoint operation.
BTC
Mode 3
DHW
Tank
Sensor
Factory
Installed
Boiler
Outlet
Sensor
Boiler Inlet Sensor (Included)
BTC
Mode 5
Outdoor
Sensor
Relay
Factory
Installed
Boiler
Outlet
Sensor
Secondary
Piping
Sensor
(Included)
Boiler Inlet Sensor (Optional)
BTC
Mode 4
Relay
Outdoor
Sensor
Factory
Installed
Boiler
Outlet
Sensor
Boiler Inlet Sensor (Included)
BTC
Mode 6
EMS
0-10 V (dc)
Relay
Boiler Inlet Sensor (Included)
Factory
Installed
Boiler
Outlet
Sensor