CaptiveAire Digi 20A Installation Manual
Digi 20 Series
One Circuit Electronic
24 Hour or 7 Day Time Switches
Digi 20A
(surface mounting)
Digi 20E
(flush mounting)
APPLICATION
Time based control of lighting, ventilating, heating, cooling
or other electrical loads in commercial and industrial applications. The Digi 20 time switches are programmable for 24hour or 7-day schedules.
The Digi 20A is intended for either surface or rail mounting.
The control is completely enclosed in a plastic housing and
includes a terminal cover and sub-base for installation and
hard wiring.
The Digi 20E is intended for flush (panel) mounting.
All units are supplied with a clear plastic dust cover. They
are also available with an enclosure for stand-alone applications. (GM and GMX models)
TECHNICAL DATA
Output–1 SPDT relay with dry contacts
Switch Rating: 16A/277VAC resistive
1000W tungsten @ 240VAC; 500W @ 120VAC
1/2 hp @ 120VAC; 1 hp @ 240VAC
100 hour capacitor back-up of memory and display
Supply voltages: Separate Models – 24VAC/DC, 120VAC,
208/240VAC, all 50/60Hz (refer to product label)
Shortest switch time–1 minute
Ambient Temperature Range –20°F to 140°F (–28°C to 60°C)
VA required: 120V & 240V models: 4VA
24V model: 2VA @ 24VAC, 1VA @ 24VDC
Screw terminal connections (Digi 20A)
1/4” quick connects (Digi 20E)
Accuracy ± 4 minutes per year
Installation
To the installer:
1. Read operating instructions carefully.
2. Check the input and output ratings marked on the unit
to
make sure this product is suitable for your power supply
and application.
3. Disconnect power supply prior to installation to prevent
electrical shock.
4. Wire in accordance with National and Local electrical code
requirements.
SURFACE MOUNTING—Digi 20A
Remove dust cover, loosen two screws on opposite corners.
Remove the housing that surrounds the time switch and the
terminal cover away from the base. Remove timer module by
pulling straight out.
Place screws through 3 mounting holes in base and screw
to back panel or wall.
Wire in accordance with instructions. Replace terminal cover
and push timer firmly onto base. Now replace housing and
secure with screws.
NOTE: The Digi 20A is also suitable for DIN rail mounting.
Break out housing part on each side that fits over rail.
PANEL MOUNTING—Digi 20E
Cut a square hole 2-5/8” x 2-5/8” (66mm x 66mm) in the front
of the panel. Insert the time switch through the opening. With
a screwdriver, press down and turn outer screws (A) until
flanges are in position to fasten the unit in front panel, then
release. Insert plugs into holes (B).
Use 1/4” quick connects and make connections in accordance with the wiring diagram shown and applicable code
requirements.
WIRING
1. Disconnect the power.
2. Wire input to timer, , with the
proper voltage marked on the
unit. Wiring to incorrect voltage
will void the warranty.
3. Connect wiring according to the
wiring diagram. The terminals on
the Digi 20A sub-base will accommodate 10 to 24 AWG wire.
Terminal Connections
B
A
A
B
FILE: E83486
C
TIME
SWITCH
M
COM NO NC
1 2 3 4 5
POWER
TIMER INTERNAL WIRING
FIELD WIRING
LOAD
■ KEYPAD DESCRIPTION
Setting the Time/Automatic Run Mode
Prog. Program Mode
Res.* Reset: Clears all programs and time
Select ON or OFF in Prog. Mode, Manual Override in Run Mode
±1h* Manual Daylight Change Key
h Setting the Hour (12:– – AM)
m Setting the Minute (12:01 AM)
Day Set Day(s) for time and programs
*Recessed keys; use a pen point to press
■ LCD DISPLAY ELEMENTS
The LCD incorporates a number of different elements to display
various data and information.
■ PROGRAMS
The Digi 20 will accept up to 20 programs
A program consists of:
1. An ON or OFF command
2. Time of day (Hour and Minute)
3. Single day or multiple days
A program is required for each ON event, and a program is
required for each OFF event.
NOTE: MULTIPLE ON OR OFF EVENTS MAY BE PROGRAMMED.
For example, Program 1 may turn the office air conditioning ON at 8AM
Mon.-Fri. Program 2 may turn the air conditioning OFF at 5PM Mon.-Fri.
If someone is working late, they may press the override key to
turn on the air conditioning. If they forget to press the override key
again when they leave, the air conditioning will stay on all night (or
all weekend).
To prevent this from occurring, additional OFF times may be
programmed.
• Program 3 can turn the air conditioning OFF at 6PM.
• Program 4 can turn the air conditioning OFF at 7PM.
• Program 5 can turn the air conditioning OFF at 8PM., etc.
!
IMPORTANT: BEFORE PROCEEDING WITH SETTING THE
TIME AND PROGRAMMING THE UNIT, PRESS THE RESET
KEY TO CLEAR ALL DATA FROM THE MEMORY.
■ SELECTING AM/PM OR MILITARY TIME
After pressing reset, the display may
show AM (right). The numbered day
symbols will be flashing on and off.
If the display does not show AM, it is
in military time mode (24:00 hr.) To
change to AM/PM mode, press and hold
the h key and press the ±1h key once.
AM will appear in display.
If display is in AM mode and military
mode is desired, press and hold the h key, press the ±1h key once.
■ SETTING THE TIME
NOTE: If the h and m keys are held down longer than 2 seconds,
the numbers will advance rapidly.
Press and hold the key during the following:
(If Daylight Savings Time is in effect, press
±1h
first)
1. Press h to advance to the current hour
(while holding down the key)
2. Press m to advance to the current minute
(while holding down the key)
3. Press Day repeatedly to advance to current day (while holding
down the key)
NOTE: If the days are flashing, it indicates the day of the week was
not set when setting the time. The timer cannot be programmed unless
the day of the week is entered.
■ MANUAL DAYLIGHT TIME CHANGEOVER
Each year, in the Spring, press ±1h to advance the time an hour. In
the Fall, press ±1h to set back an hour.
■
PROGRAMMING 24 HOUR OR 7 DAY SCHEDULES
It is helpful to write out the program schedules
before
beginning. See last page.
!
IMPORTANT: THE CURRENT TIME OF DAY AND DAY OF
WEEK MUST BE SET PRIOR TO PROGRAMMING. SEE “SETTING THE TIME”
Example
Program 1: ON at 7:00AM Monday thru Saturday
Program 2: OFF at 5:00PM Monday thru Friday
Program 3: OFF at 7:00PM Saturday
Three programs need to be entered.
Press Prog. key only once. Display shows:
Program 1
(ON at 7:00AM Monday thru Saturday)
Press key once ON symbol appears
Press h key to 07AM
Press m key once to 00
Press Day key once 1 2 3 4 5 6 is displayed
Press Prog. key to enter
Days of the Week ➠
Daylight Time Symbol ➠
AM and PM Symbol ➠
➠
➠
➠
➠
Time of Day or
Switching Time
Manual Override ON
ON/OFF Symbol
OFF Symbol
ON Symbol
Continuous OFF Symbol
Continuous ON Symbol
Run Mode Symbol
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