tekmar 157 Difference Setpoint Control - Manual (Page 12)

© 2010 D 157 - 06/10 12 of 16
Item Field Range Description
-30 to 300°F
(-34 to 149°C)
AUXILIARY MINIMUM
Minimum auxiliary temperature since this item was last cleared.
To clear, press and hold the up and down buttons for 1 second.
Note: this item is only available if the auxiliary sensor is connected
to the control.
0 to 100%
PUMP SPEED
Current % output of the variable speed pump.
0 to 1,999,999
BTU or kWh
ENERGY TRANSFER
Total amount of BTU’s or kWh’s transferred from the source to
the storage since this item was last cleared. To clear, press and
hold the up and down buttons for 1 second.
1 count = 1000 BTU.
0 to 1,999,999 hours
PUMP 2 RUNNING HOURS
The total running time of pump 2 since this item was last cleared.
To clear this item, press and hold the up and down buttons for
one second. 1 count = 1 hour.
VIEW MENU
View Menu (2 of 2)
After the last item, the control returns to the first item in the menu.
Item Field Range Description Actual Setting
OFF, 1, 2, 3, 4
Default = OFF
MODE
Mode of operation for Second pump, P2.
Mode 1 = Heat Exchanger, Mode 2 = Heat
Supplement, Mode 3 = Heat Dump, Mode 4 =
Booster Pump, Mode = Off (no P2 operation)
2 to 90°F
(1 to 50°C)
Default = 15°F
(8°C)
DELTA T TARGET
The variable speed pump, P1, will try to maintain
the temperature difference between the source and
storage at this target.
2 to 45°F
(1 to 25°C)
Default = 10°F
(5.5°C)
DELTA T DIFFERENTIAL
When the delta T drops this differential below the
delta T target the variable speed pump, P1, will
run at the minimum % output for 2 minutes then
turn off.
50 to 200°F
(10 to 93°C)
Default = 180°F
(82°C)
MAXIMUM STORAGE TARGET
If the storage temperature rises above this maximum
target, the variable speed pump is turned off.
Adjust Menu (1 of 3)
ADJUS
T MENU
Continued on next page.
The Program menu items are the programmable settings
used to operate the system. Press and hold all three
buttons simultaneously to enter the Program menu.
Item Item
Change Value Next Item Enter Adjust Menu