RenewAire TC7D Series Digital Time Clock

TC7D-W (Wall Mount)

A line drawing shows the TC7D-W unit, a wall-mountable digital time clock with a display and control buttons.

TC7D-E (Enclosure)

A line drawing shows the TC7D-E unit, designed for installation within an enclosure.

Safety Precautions

WARNING

To reduce the risk of fire, electric shock, or injury to persons, observe the following rules:

• Use the unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer.
• Before installing, servicing, or troubleshooting the transformer/relay package, switch power off at the service panel and lock the service panel to prevent power from being switched on accidentally.

CAUTION

• More than one disconnect switch may be required to de-energize the equipment for servicing.
• Installation work and electrical wiring must be done by qualified person(s) in accordance with all applicable codes and standards, including fire-rated construction codes and standards.
• When cutting or drilling into walls or ceilings, do not damage electrical wiring and other hidden utilities.
• NEVER place a switch where it can be reached from a tub or shower.
• Intended for use with 24VAC Class 2 power supplies only.
• Do not connect loads that exceed the timer's switch rating.
• Confirm sufficient 24VAC power is available to operate the timer and the connected loads.

Overview

1.0 Overview

This section provides general information about the TC7D Series Digital Time Clock.

1.1 Specifications

• Operating Voltage: 24VAC 50/60Hz
• Switching: Single Pole, Single Throw [SPST] (can be field-modified to Single Pole, Double Throw [SPDT])
• Power consumption: 3.5VA
• Battery Backup: CR2032 lithium battery for timer backup, needs replacement approximately every 2-3 years.
• Switch rating: 16 Amps at 131°F
• Operating Temperature Range: 32°F - 140°F
• Connections: (3) 16 GA pigtails (wire nuts not provided)

Functional Description of Buttons:

• TIMER: Programs review & setting programs.
• MANUAL ON AUTO OFF: To select ON, AUTO, or OFF modes.
• CLOCK: To adjust the current DAY and TIME.
• DAY: To adjust the day of the week.
• HOUR: To adjust the hour.
• MIN: To adjust the minute.
• [Reset button]: Resets the timer's settings.
• LED: Indicates ON/OFF status.

Press the [Reset button] before programming.

Setting Options:

• 16 pairs of on-off time of day cycles can be programmed.
• Each on-off cycle can be assigned to any one day of the week, or to the following groups of days: Monday-Friday; Monday-Saturday; Monday-Sunday; Saturday and Sunday; Monday-Wednesday; Thursday-Saturday; Monday/Wednesday/Friday; Tuesday/Thursday/Saturday.
• Manual override is provided by the "On/Auto/Off" switch.
• The Program Reset button clears all settings. Use a small pointed object to push the reset button, located just above the "MIN" dark gray button.

Enclosure (TC7D-W):

• Requires a 4" x 4" electrical box (by others).
• The box must accommodate (4) mounting screws.
• Minimum box depth is 1.5". A white wall plate and mounting screws are provided.

Enclosure (TC7D-E):

• Designed for NEMA 4X and 12K enclosures.
• Use installation instructions provided with the enclosure.

1.2 Dimension Drawings

Figure 1.2.0 TC7D-W Dimensions: A diagram showing the front view of the TC7D-W unit with overall dimensions of 4 1/2 inches by 4 1/2 inches. The display area is approximately 3 5/16 inches high. Four mounting screw holes are indicated.

Figure 1.2.1 TC7D-E Enclosure Dimensions: This figure displays isometric, front, and section views of the TC7D-E unit within its enclosure. It details enclosure dimensions and mounting hole specifications, such as Ø.250 TYP and spacing of 4.375 x 3.975 inches.

Settings

2.0 Settings

2.1 Setting Instructions

Setting the Clock:

• Press and hold the [CLOCK button].
• Press the [DAY key] until the correct day is displayed.
• Repeat for the [HOUR] and [MIN] buttons to set the time.

Setting the Timer:

Press the "DAY" key to scroll through the programming settings. A table shows which days are selected for each of the 15 programmable slots.

These settings can simplify programming. All times must be the same for the days chosen. For example, to run a device Monday through Friday at the same time, select slot #9.

Press the [TIMER key]. The display will show "1ON--:----". Set the desired turn-on time using the [HOUR] and [MIN] buttons. To set the turn-off time, press the [TIMER key] again; the display will show "1OFF--:----". Set the turn-off time using the [HOUR] and [MIN] buttons. For more than one on/off cycle per day, press the [TIMER key] again and set "2ON--:----," "2OFF--:----," and so on, up to a maximum of 8 on/off cycles per day.

The timer is now set. Push the [MANUAL button] until the indicator line is under "AUTO." If you only need one on/off per day or have completed programming all cycles, press the [CLOCK key] again.

Resetting Settings:

To change any or all on/off times, you must reset the timer; individual settings cannot be changed directly. To erase all settings, press the [Reset button].

Operation Modes:

There are three operation modes: "ON," "AUTO," and "OFF," selected via the [MANUAL key]. Observe the indicator line on the screen as you cycle through these modes:

• MODE ON: The output turns on immediately and stays on.
• MODE OFF: The output turns off immediately and stays off.
• MODE AUTO: The output turns on and off based on the programmed schedules.

When the timer is not powered, the output turns off permanently.

Electrical

3.0 Electrical

3.1 Electrical Schematics

Figure 3.1.0 EV90, EV90P, EV130, EV200, EV240, AND EV300 SCHEMATIC: A block diagram illustrating the connection of the TC7D timer to control terminals for various RenewAire ERV models (EV90, EV90P, EV130, EV200, EV240, EV300), powered by a 24VAC Class II Power Supply.

Figure 3.1.1 EV PREMIUM AND SL75 SCHEMATIC: A wiring diagram showing the TC7D timer connected to a control board for EV Premium and SL75 units. It details connections using wire colors RED, WHITE, BLACK, and YELLOW to terminals labeled SF_ECM_SIGNAL and SF_ECM_POWER. Note: A wire connecting Terminal 1 of the TC7D to the relay common must be cut to eliminate voltage to the relay common.

In this example, the timer turns the Energy Recovery Ventilator (ERV) on at High speed when the timer dictates it is an occupied time.

Figure 3.1.2 HE1.5 STANDARD WIRING SCHEMATIC: A simplified wiring diagram showing the TC7D connected to a 24VAC Power Supply, an Isolation Relay Coil, and potentially other low voltage controls via Normally Closed (N.C.) contacts, which can be paralleled with the TC7D-E/W.

Figure 3.1.3 HE1.5RT WITH INDEPENDENT BLOWER CONTROL AND HE2X-LE10X SCHEMATIC: Similar to Figure 3.1.2, this diagram shows TC7D connections to a 24VAC Power Supply and an Isolation Relay Coil or Damper Actuator Coil. It notes that N.C. contacts of additional Low Voltage Controls can connect to ERV unit's Terminals 1 & 4, cautioning against applying power to these terminals.

Figure 3.1.4 HE1.5 ECM WITH TERMINAL BLOCK SCHEMATIC: Another wiring diagram illustrating TC7D connections to a 24VAC Power Supply and an Isolation Relay Coil or Damper Actuator Coil. It also specifies connecting N.C. contacts to ERV unit's Terminals 1 & 4.

Figure 3.1.5 HE05, HE07, HE10, AND HE1.5 ECM WITH CIRCUIT BOARD SCHEMATIC: A detailed wiring diagram showing the TC7D timer connected to a circuit board for HE05, HE07, HE10, and HE1.5 ECM units. It includes connections for a Doorkill Switch, 24VAC, COM, and various circuit board terminals (OA/FA, EA/RA, EF10V, EFW, EFGND, SF10V, SFW, SFGND, BYPASS, BYPASSCOM). Wire colors are indicated. This setup allows the timer to control ERV speed via potentiometers when the space is occupied.

Figure 3.1.6 HE05, HE07, HE10, AND HE1.5 ECM WITH CIRCUIT BOARD AND CO2 SCHEMATIC: This diagram is similar to Figure 3.1.5 but includes connections for a CO2 Controller. It provides instructions on removing potentiometers and wiring the cut wires to the CO2 Controller. It also lists model configurations for HE1.5X ECM with Timer and Timer/CO2 Sensor.

In this example, the ERV runs at variable speed, with the CO2 Controller setting the speed based on CO2 levels when the space is occupied.

Figure 3.1.7 RH-W ELECTRIC HEATER SCHEMATIC: A wiring diagram showing the TC7D timer connected to an RH-W 0-10VDC Thermostat. It details 24VAC power supply connections and explains how Normally Closed (N.C.) contacts on the thermostat control comfort or economy modes for the RH-W heaters. Note: Remove supplied wires from the time clock spade terminals prior to wiring to the RH-W thermostat.

Factory Assistance

4.0 Factory Assistance

In the event that assistance is needed from the factory for a specific issue, ensure you have the information required on the Unit Records page in the Owner Information section of the unit manual. The factory representative will need this information to properly identify the unit and its installed options.

To contact RenewAire Customer Service:

• Call: 800-627-4499
• Email: RenewAireSupport@RenewAire.com

About RenewAire

For over 40 years, RenewAire has been a pioneer in enhancing indoor air quality (IAQ) in commercial and residential buildings. This is achieved by maximizing sustainability through their fifth-generation, static-plate, enthalpic-core Energy Recovery Ventilators (ERVs). These ERVs optimize energy efficiency, lower capital costs via load reduction, and decrease operational expenses by minimizing equipment needs, resulting in significant energy savings. RenewAire ERVs are competitively priced, simple to install, easy to use and maintain, and offer a quick payback. They are backed by the industry's best warranty due to long-term reliability derived from innovative design practices, expert workmanship, and Quick Response Manufacturing (QRM).

As the pioneer of static-plate core technology in North America, RenewAire is the largest ERV producer in the USA. The company is committed to sustainable manufacturing and lessening its environmental footprint. Their Waunakee, WI plant is 100% powered by wind turbines and is LEED and Green Globes certified, as well as having achieved ENERGY STAR Building status. In 2010, RenewAire joined the Soler & Palau (S&P) Ventilation Group to provide direct access to the latest in energy-efficient air-moving technologies. For more information, visit: renewaire.com.

RenewAire is a member of the Soler & Palau (S&P) Ventilation Group.

Address: 201 Raemisch Road | Waunakee, WI | 53597 | Phone: 800.627.4499 | Website: RenewAire.com