Display And Symbol Description; Sequence Of Operation; Powering Up The Control; Setpoint Operation - Tekmar Difference Setpoint Control 156 Data Brochure

Display
Menu Field
Displays the
current menu
Item Field
Displays the current
item selected.
Symbol Description
POINTER
▼
Displays the control operation as
indicated by the text.
HEAT RELAY
HEAT
Displays when the HEAT relay is
closed.

Sequence of Operation

Powering Up the Control

When the Difference Setpoint Control 156 is powered up,
all segments are displayed in the LCD for 2 seconds, and
then the type number is displayed for 2 seconds. Next,

Setpoint Operation

Source
Sensor
Heat
Source
ΔT
Source
Storage
Item
Storage
Sensor
Pump Heat
Storage
Minimum
Maximum
Diff'l ΔT • hours
°F, °C
° ° F° ° C
Units of measurement
PROGRAM MENU
PRGM
Program the control settings.
the software version is displayed for 2 seconds. Finally,
the control enters into the normal operating mode and by
default the LCD displays the current ΔT temperature.
The Difference Setpoint Control 156 has two control points;
heat source and storage. The heat source could be a solar
collector or wood boiler while the heat storage is typically
a storage tank. The control is looking at the temperature
difference (ΔT) between the source and storage to determine
when to close the relay and start the heat transfer. The
setpoint operation that follows will explain the on and off
points of the relay.
3 of 12
Number Field
Displays the current value
of the selected item
Status Field
Displays the current
status of the relay.
Buttons
Selects Menus, Items
and adjusts settings
© 2010 D 156 - 06/10