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Heatronic 4000 7738003455 (2014/04)12 of 60
If the Application Mode is configured for Setpoint (SETP), the
control provides heat for the setpoint load.
Indirect Domestic Hot Water (IDHW) operation is available
during setpoint operation.
Central Heat (CH) Call
---------------------------
A CH Call is required in order for the control to provide heat to
a setpoint load, such as a spa, pool or snowmelt load. Once
the control registers a CH Call, it will display the “Heat” icon
under the Calls in the display. A CH Call can be provided in
two ways:
Contact Closure
A dry contact or 24 V (ac) signal is applied across the CH Call
terminals 9 & 10.
Boiler Target Temperature During a Setpoint Call - - - -
When a CH Call is present, a boiler target is determined.
When using a Contact Closure, the boiler target is set to the
SETP Setpoint setting.
When using a tekmarNet
®
Setpoint Control, the boiler target
is set to the devices Exchange Supply setting.
If there are multiple devices calling for heat, the boiler target
is set to the highest temperature requirement.
Setpoint During UnOccupied
When using a Contact Closure, a second SETP Setpoint setting
is available for the Unoccupied periods.
DIP Switch must be set to Setback to view UnOccupied
items.
Setpoint operation is not provided during the Away
Scene.
Setpoint Operation
Energy Management System (EMS) Operation
The control can accept an external DC signal from an Energy
Management System (EMS). The control converts the DC
signal into the appropriate boiler target temperature for the
space heating system.
EMS is available by setting the APP MODE in the Setup Menu
to EMS.
Indirect Domestic Hot Water (IDHW) is available during
EMS operation.
Heat Call
-----------------------------------------
A Heat Call is required in order for the control to provide a
target water temperature for the space heating system. Once
the control registers a Heat Call, it will display theHeat” icon
under the Calls in the display.
A Heat Call is provided by:
Input Signal
An external signal is generated by applying a voltage between
0 V (dc) & 10 V (dc) across the EMS (+) In & Com (-) terminals
(16 & 19). Voltages that exceed 10 V (dc) will still be considered
a 10 V (dc) signal.
If the EMS signal goes below the minimum voltage, the “Heat”
icon under the Calls in the display is turned off. The boiler target
temperature is displayed as– –” to indicate that there is no
longer a call for heating.
External Central Heat (CH) Call terminals are not
operational.
EMS Signal
- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - - -- - - -
The control can accept either a 0-10 V (dc) signal or a 2-10 V
(dc) signal. The EMS SGNL setting must be set to the proper
setting based on the signal that is being sent to the control.
0 - 10 V (dc) or 0 - 20 mA
When the 0-10 V (dc) signal is selected, an input voltage of 1 V
(dc) corresponds to a boiler target temperature of 50°F (10°C).
An input voltage of 10 V (dc) corresponds to a boiler target
temperature of 210°F (99°C). As the voltage varies between 1
V (dc) & 10 V (dc) the boiler target temperature varies linearly
between 50°F (10°C) & 210°F (99°C).
If a voltage below 0.5 V (dc) is received the boiler target
temperature is displayed as “– – –” indicating that there is no
longer a call for heating.
A 0 - 20 mA signal can be converted to a 0 - 10 V (dc) signal
by installing a 500 Ω resistor between the EMS (+) In & Com
(-) terminals (16 & 19).
2 - 10 V (dc) or 4 - 20 mA
When the 2 - 10 V (dc) signal is selected, an input voltage of 2 V
(dc) corresponds to a boiler target temperature of 50°F (10°C).
An input voltage of 10 V (dc) corresponds to a boiler target
temperature of 210°F (99°C). As the voltage varies between 2
V (dc) & 10 V (dc) the boiler target temperature varies linearly
between 50°F (1C) & 210°F (99°C). If a voltage below 1.5
V (dc) is received the boiler target temperature is displayed as
“– – –” indicating that there is no longer a call for heating.
A 4 - 20 mA signal can be converted to a 2 - 10 V (dc) signal
by installing a 500 Ω resistor between the EMS (+) In & Com
(-) terminals (16 & 19).
CONVERSION TABLE 0 - 10
0 - 20 mA* 0 - 10 V (dc) Boiler Target
0 0 – – – (OFF)
2 1 50°F (10°C)
4 2 68°F (20°C)
6 3 86°F (30°C)
8 4 103°F (39°C)
10 5 121°F (49°C)
12 6 139°F (59°C)
14 7 157°F (69°C)
16 8 174°F (79°C)
18 9 192°F (89°C)
20 10 210°F (99°C)
*Requires 500 Resistor in Parallel
12


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