Tork EWZ201C - User Manual

INSTRUCTION MANUAL
FOR TECHNICAL SUPPORT:
888.500.4598 • techsupport@nsiindustries.com
Programming videos at nsiindustries.com
EWZ101C
EWZ201C
DIGITIAL TIME SWITCH
MLI-225 (A)
CLOCK OPERATED SWITCH
469D

Summary

Planning Your Program

INSTALLATION

1.0 TWO CHANNEL; ONE CHANNEL SELECTION

2.0 TO SET CLOCK

3.0 TO SET DATE

6.0 SCHEDULE SET MODE

6.1 SETTING HOURS, MINUTES AND DAYS

Step-by-step guide to program ON/OFF events with specific times and days.

7.0 ASTRONOMIC MODE (SUNSET;SUNRISE)

7.1 SELECTING CHANNEL AND LATTITUDE

7.2 SELECTING ASTRO DAYS ON

7.4 SELECTING ASTRO DAYS OFF

8.0 REVIEW, MODIFY AND DELETE

11.0 USE EWZ201 C AS MOMENTARY UNIT

Overview

1. Planning Your Program
2. Planning Your Holiday Schedule
3. Installation
4. Programming
5. Two Channel / One Channel Selection (EWZ201C only)
6. Set Clock
7. Set Date
8. Daylight Saving Time (DST)
9. Holiday Mode
10. Schedule Set Mode
11. Astronomic Mode (Sunset/Sunrise)
12. Review, Modify, and Delete
13. Override
14. Event
15. Use EWZ201C as Momentary Unit
16. Notes

This document provides the instruction manual for the TORK EWZ101C and EWZ201C Digital Time Switches, which are clock-operated switches designed for various scheduling and control applications.

The EWZ series time switches offer a range of capabilities, including 7-day scheduling with up to 32 set points. The EWZ101C model can be wired as either a Single Pole Single Throw (SPST) or Single Pole Double Throw (SPDT) switch. The EWZ201C is more versatile, being field convertible for 2-channel operation, 1-channel Double Pole Single Throw (DPST) operation, or momentary output. Both models support up to 20 block holidays and feature an astronomic option for automatic ON at sunset and OFF at sunrise, ideal for outdoor lighting applications.

Key features of these time switches include automatic daylight saving time adjustment (user selectable) and automatic leap year compensation. In the event of a power outage, the unit retains its schedule permanently, thanks to a supercapacitor that provides 4 days of real-time backup. Manual override is also available, effective until the next scheduled event. The devices are designed for multi-voltage input, supporting 120-277 Volts.

Planning Your Program:

The EWZ201C in two-channel mode allows for different control logic for each channel. For example, one channel can be set for sunset to sunrise operation, while the other is set for sunset to a specific time OFF. In one-channel DPST mode, both relays turn ON and OFF simultaneously, which is useful for switching 208 or 240 volts. The momentary output mode is designed for switching latching contactors; conversion to this mode involves removing a jumper on the back of the timer, as detailed in the installation section. To complete a schedule for each channel, two schedule (SCH) events are required: one for ON and one for OFF. The event screen will display the event number from 01 to 32.

Planning Your Holiday Schedule:

Users can select up to 20 holiday blocks, each with a start and end date. Holiday blocks can range from one day to 364 consecutive days, but they must not cross over December 31st. If a holiday period spans across the new year, it must be entered as two separate blocks (e.g., 12/18 to 12/31 and 01/01 to 01/05). During these holiday dates, the timer will execute a special holiday schedule. If no specific holiday schedule is entered, ON/OFF operations will be omitted. Astronomic schedules, however, are not affected by holiday dates and will always execute if chosen.

Installation:

Installation of the unit must be performed by a licensed electrician. To remove the unit from its enclosure, push the tab on the right outward and lift the mechanism. The left side is held in place as the mechanism swings out to the left for removal. The enclosure should be mounted at eye level, and supply and load wires brought in through the side or bottom knockouts (top knockouts should not be used).

For the EWZ201C, conversion to a momentary unit involves removing a small black jumper located on the upper right next to the R35 marking on the back of the mechanism. After removing the jumper and restoring power, the unit must be reset by inserting a small pin or paper clip into the hole next to the EVENT key. The unit is then reinstalled by reversing the removal steps and connecting wires according to the provided wiring diagrams. Power should be applied to the unit, and programming should only be done with AC power, not under supercapacitor backup power. When powering up for the first time, allow 1-2 minutes for the supercapacitor to charge. If the screen is blank after 2 minutes, press the reset button.

Programming:

Programming for the EWZ101C starts at step 2.0, while for the EWZ201C, it starts at step 1.0. After making any program changes, the MODE button must be pressed to go to RUN mode, followed by the EVENT button to update the load status.

Two Channel / One Channel Selection (EWZ201C only):

Upon initial power-up, the display will show a flashing "2CH".

• For 2-channel operation: Press ENTER, then proceed to section 2.0 (Set Clock).
• For 1-channel DPST operation: Press DEL, and the display will show a flashing "1CH". Press ENTER to save and proceed to section 2.0 (Set Clock).

Set Clock:

The display will show "AM 12:00 CLK". Press HOUR and MIN to adjust the time, checking AM/PM, then press ENTER.

Set Date:

The display will show a default date (e.g., "MO 01 01 07 DATE"). Press MONTH, DATE, and YEAR to set the current date, then press ENTER. The day of the week will be set automatically.

Daylight Saving Time (DST):

The display will show "dSt ON".

• For standard USA DST: Press MODE, then proceed to section 5.0.
• If DST is not required: Press DEL, and the display will show "dSt OFF". Press ENTER, then proceed to section 5.0.
• To modify standard USA DST dates: Consult the factory at techsupport@nsiindustries.com.

Holiday Mode:

The display will show "HdAY00" if no holidays are entered.

• 5.1 Set Holiday Start Date: Press ENTER. The screen shows "HdAY01 ON". Press MONTH and DATE to set the desired start date, then press ENTER.
• 5.2 Set Holiday End Date: The screen shows "HdAY01 OFF".
  • For a single holiday: Press ENTER.
  • For block holiday dates: Set the ending date using MONTH and DATE, then press ENTER.
• 5.3 Additional Holiday Entries: Repeat steps 5.1 and 5.2 for up to 20 holidays. Press MODE when all holidays are complete.

Schedule Set Mode:

Press MODE until the display shows "--:-- 01 SCH".

• For EWZ201C in 2-channel mode, press CH1/CH2 to select channel 1 or 2.
• 6.1 Setting Hours, Minutes, and Days:
  • Press HOUR and MIN to set the desired time.
  • Press EVENT to set the event (ON or OFF).
  • Press DAY to change the selected day groups (e.g., MO to SU, MO-FR, SA-SU). Day group 12 (all days flashing) will execute on Holiday block dates.
  • Always press ENTER to save a new entry. Continue pressing ENTER to review all 32 schedule positions. Press MODE when the schedule is complete. Each ON and OFF setting must be entered separately, forming an ON/OFF pair.

Astronomic Mode (Sunset/Sunrise):

The display shows "ASTRO LAEN--". Press MODE to skip.

• 7.1 Selecting Channel and Latitude: Press CH1/CH2 to select the channel for EWZ201C. Press LATITUDE to set the desired latitude (10° to 60° north or south). A latitude map is provided in the back of the instructions. Press ENTER.
• 7.2 Selecting Astro Days ON: The display shows "CH1 ON ASTRO --:--". Press DAY to cycle through day groups. Press ENTER. Sunset time is based on the entered date and latitude.
• 7.3 Selecting Offset Time for ON: The display shows "MO TU WE TH FR SA SU ASTRO OFFSET ON 00:00". Press HOUR and MIN to set an offset (up to 4 hours) to turn the load ON earlier (-) or later (+) than sunset. Press EVENT to select + or -. Press ENTER.
• 7.4 Selecting Astro Days OFF: The display shows "MO TU WE TH FR SA SU ASTRO CH1 OFF --:--". Press DAY to show sunrise time. No changes can be made to day selection for sunrise. Press ENTER.
• 7.5 Selecting Offset Time for OFF: The display shows "MO TU WE TH FR SA SU ASTRO CH1 OFFSET OFF 00:00". Press HOUR and MIN to set an offset (up to 4 hours) to turn the load OFF earlier (-) or later (+) than sunrise. Press EVENT to select + or -. Press ENTER. Press MODE to return to AUTO mode.

Review, Modify, and Delete:

Press MODE to cycle through the following modes for review and modification:

• 1. CLOCK MODE: Press HOUR and MIN to modify, then ENTER.
• 2. DATE MODE: Press MONTH, DATE, and YEAR to modify, then ENTER.
• 3. DST Daylight Saving Time: Press ENTER to review. Press MONTH, DAY, and DATE to modify, then ENTER.
• 4. HOLIDAY MODE: Press ENTER to modify dates. Press MONTH and DATE to set the start date (HdAY01 ON). For a single-day holiday, skip the OFF screen and press ENTER. For block holidays, set the OFF date using MONTH and DATE (HdAY01 OFF), then ENTER.
• 5. SCHEDULE MODE: Press ENTER to advance to the desired event. Press HOUR, MIN, and EVENT to modify. Press DAY to modify days. Press DEL to delete. Press ENTER after each modification.
• 6. ASTRO MODE: Press CH1/CH2 to select the channel. Press LAT to change latitude. Press ENTER. Press DAY to add or delete days in sunset mode. Press ENTER. Press HOUR and/or MIN to change the offset time for sunset. Press EVENT to change offset from + to -. Press ENTER and follow the same procedure for sunrise settings.
• 7. RUN MODE: Displays time, day, seconds, channel status, and AUTO.

Override:

The OVR (Override) function is effective in AUTO mode until the next scheduled event, and indefinitely in MAN (manual) mode.

Event:

In RUN mode, the EVENT button updates the load status by executing the last scheduled event for CH1 and CH2. The display shows the last scheduled event for CH1; press EVENT again for CH2. If no schedule is programmed, the display shows "-:-".

Use EWZ201C as Momentary Unit:

To convert the EWZ201C to a momentary unit, first remove all power. Remove the mechanism from the enclosure to access the back. Remove the small black jumper near the R35 marking. Reinstall the mechanism and restore power. Reset the unit by inserting a small pin or paper clip into the hole next to the EVENT key, then reset the clock and date. After removing the jumper and resetting, the unit will be configured as a 1-channel momentary ON and OFF. Only CH1 will be programmed; CH2 can be viewed but will not take effect. A 2-second closure between terminals 3 and 4 occurs at an ON event, and between terminals 5 and 6 at an OFF event.

Notes:

• 1. MAN mode: In this mode, the unit disregards schedule settings and remains in its manually set ON or OFF status. To resume regular schedule execution, press the MODE key to return to AUTO mode.
• 2. Auto Run Mode: The unit will automatically enter RUN mode if no key is pressed for 5 minutes (except in MAN mode).
• 3. Clear All Memory: To clear all memory, while in RUN mode, press ENTER. The display will show "CLEAr OFF AUTO". Use the EVENT key to display "CLEAr ON AUTO". Press ENTER briefly to erase all timer memory, including real time and date. The unit has permanent memory and will not be erased unless this procedure is followed.
• 4. Frequency Display: Upon powering up the EWZ201, the display will show "50" for 50Hz or "60" for 60Hz, indicating the operating frequency.
• 5. Power Failure Indication: In AUTO mode, if AC power is absent, the display will show "PF" (power failure) instead of the seconds scrolling.
• 6. Low Supercapacitor: A "Lo" on the display indicates a low supercapacitor charge, requiring AC power. A minimum of 8 hours is needed for a full charge.
• 7. Persistent Power Failure: If "PF" still shows after power is restored, try resetting the unit by inserting a small pin or paper clip into the hole next to the EVENT key and re-setting the clock and date.

The manual also includes schedule sheets for recording load descriptions, ON/OFF times, and days of the week, as well as an astronomic schedule sheet for latitude, sunset/sunrise times, and offsets. A map of astronomic latitude zones for the USA and Puerto Rico is provided, along with wiring diagrams for the EWZ101C (SPST and SPDT) and EWZ201C (CH1/CH2 SPST, Momentary Option, and DPST).

Tork EWZ201C Specifications

General

Type	Digital Timer
Voltage	120-277 VAC
Amperage	20A
Number of Channels	1
Backup	Battery backup
Contact Type	SPDT
Display	LCD
Programming	7-Day
Horsepower	1 HP
Mounting	Surface
Operating Modes	Automatic, Manual
Enclosure	NEMA 1