
24
Installation and Operation 20/40/60 Minute Timers
MODEL DET - II
Installation of Mechanical Timers Part # 28998
Operating your DET-II 20/40/60 Minute Fan Timer
Press and release the
Select Button
to activate a 20, 40 or 60
minute high speed override cycle. The
High Speed Status
Light
will illuminate and the unit will run on high speed
ventilation for the selected time.
The
High Speed Status Light
will dim after 10 seconds of
run time.
The
High Speed Status Light
will flash during the last 5
minutes of the cycle.
All timers connected to the unit will illuminate for the
duration of the override when the
Select Button
is pressed.
Lockout Mode
Lockout Mode is useful if you wish to disable the timers.
The timer can be set to lockout mode by pressing and
holding the
Select Button
for five seconds. After five
seconds, the
High Speed Status Light
will flash; release the
Select Button
. The timer is now in lockout mode. If the
Select Button
is pressed during lockout mode the
High
Speed Status Light
will momentarily illuminate but no
override will be initiated.
If lockout mode is initiated when the timer is activated, the
timer will continue its timed sequence but will not allow any
further overrides to be initiated. Lockout mode can be
unlocked by pressing and holding the
Select Button
for five
seconds. After five seconds the
High Speed Status Light
will
stop flashing. Release the
Select Button
and the timer will
now operate normally.
The Mechanical timer is a 2 wire "dry contact" timer. A
jumper wire must be connected between ON and RED.
Connect the 2 timers wires to ON and HI. Refer to
illustration.
Terminal Block
Connections
(from Timer to Terminal Block)
Yellow on timer to YELLOW #4
Red on timer to RED #3
Green on timer to GREEN #5
Red #3
Yellow #4
Green #5
High Speed
Status Lights
Select Button
initiates high speed
ventilation for 20, 40
or 60 minutes.
Yellow
Red
Green
NOTE ABOUT TIMERS
• Timers mount in standard 2” x 4” electrical boxes.
• Wire multiple timers individually back to the unit.
• Use 3/20 low voltage wire
Off
10
20
30
40
50
60
2 wire timers require a
jumper wire between ON and
RED on the terminal block.
Connect the 2
wires from the
timer to ON and
HI on the Terminal
Block.
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