Item – tekmar 157 Difference Setpoint Control User Manual

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Display

ΔT

Delta T
Displays the temperature difference
between the source and storage
sensors.

SOURCE

Source
Displays the temperature at the source
sensor.

MODE

Mode
Displays the modes of operation for the
on/off pump, P2.

FLOW

Flow
Displays the maximum flow rate of the
variable speed pump.

DIFF

Differential
Displays any differential.

ENERGY

Energy
Displays the total number of BTU’s or
kWh’s accumulated by the control’s
energy calculation.

FREEZE

PROTECTION

Freeze Protection
Displays the status of the freeze
protection function of the control.

Pump
Displays the status of the variable
speed (1) and secondary (2) pump.

STORAGE

Storage
Displays the temperature at the
storage sensor.

AUXILIARY

Auxiliary
Displays the temperature at the
auxiliary sensor.

MINMAX

Minimum and Maximum
Displays the min and max sensor
temperatures.

TARGET

Target
Displays any target.

Fluid Constant K
Used to calculate heat transfer. Look
up fluid constant in this data brochure.

OUTPUT

Output
Displays the % output of variable speed
pump. Each bar represents 20% output.

°F,°C, min,

% ,BTU, kWh,

GPM

Units of Measurement

Demand Pointer
Displays if a demand is applied to the
control.

Symbol Description

Item

Number Field

Displays the current value
of the selected item

Item Field

Displays the current

item selected.

Menu Field

Displays the

current menu

Buttons

Selects Menus, Items
and adjusts settings

Status Field

Displays the current
status of the relay.