7:14 (24), 0-004-7614-0 (GB) TAC AB, 1998-10-23
TAC 2413 Handbook Functional description
Pump exercise
The pump is exercised once a day at 12:00 noon–12:01 in order to
prevent seizures during the summer months, for example.
P No. Parameter Min. Max. Factory set. Change Comment
P 35 Outdoor temp limit for 0 °C 50 °C 17 °C
pump stop, heating coil
7.3.10 Electric heating
Electric heating is chosen by using DIP switch 5. The control signal
to the battery is 2–10 V, but by using DIP switch 7, 0–10 V can be
chosen, where 0 (2) V = 0 % (electric heating) och 10 V = 100 %
(electric heating).
When electric heating has been chosen, the frost protection function,
its alarm and return limitation are all disabled. The pump alarm is re-
placed with an overheating guard. The control signal controls an ex-
ternal step controller or a thyristor device. During heating control, the
battery is controlled in sequence with the HEX/mixed air damper.
When the control signal to the HEX is 100 %, input K4 for the con-
trol circuit closes first; then, the control signal is allowed to control
the battery.
When the AHU stops, K4 is released immediately and the control sig-
nal is set to 0 %. The fans will run for re-blowing during an adjusta-
ble time, which is factory set to three minutes. If there is a fan alarm
or overheating, the same process applies.
P No. Parameter Min. Max. Factory set. Change Comment
P 36 Re-blowing time during 0 min 9 min 3 min
electric heating
7.3.11 Cooling coil
The control signal of the cooling valve is 2–10 V, but by using DIP
switch 7, 0–10 V can be chosen instead. 2(0)V=0 % is equal to a clo-
sed valve and 10V=100% is equal to an open valve.
The cooling coil will be engaged only when the temperature has in-
creased so much that it has reached the cooling setpoint. TAC 2413
then switches from controlling by the heating setpoint to controlling
by the cooling setpoint automatically. These conditions apply:
• The cooling valve starts controlling only when the supply air or
room temperature reaches the “Cooling setpoint”
• The HEX and heating valve are closed
• The current date is within the “Summer period” (cooling control).
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