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Heat Controller EKTH, EKTC Control Board User Inputs, Maximum Wire Length for Front Desk Switch

Models: EKTC EKTH

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Operating Instructions

 

SW2

P10

P11

AUXILIARY

REMOTE THERMOSTAT

 

 

DS1 DS2 MS1 MS2 EH IN LS FD1 FD2 TF- TF+ C

R GL W2 Y/W1 B GH

 

 

 

P12

M1

 

COM A

COM B

 

 

 

 

 

 

ON / OFF

MASTER SWITCH

Control Board User Inputs*

P13

M2

IAT

BLACK

*NOTE: The PTAC Wire Harness Kit (PWHK01C) is required for the auxiliary or remote thermostat options.

ADDITIONAL CONTROL INPUTS

The control inputs shown above provide additional unit control and features. To access these control inputs, the cabinet front must be removed (see Front Removal).

MASTER SWITCH

The master switch disconnects power to all of the system components. When this switch is in the off position, the compres- sor, fan motor, reversing valve, and electric resistance heater will all be de-energized.

installation of a front desk switch. The following figure shows a wiring schematic for connecting the front desk switch to the unit.

If the unit is configured for wired unrented setback energy management (see Configuration Settings section c2), EH and IN terminals are used instead of FD1 and FD2. If EH and IN are shorted, the unit will go into setback temperatures for cooling and heating as configured in c3 and c4 (see Configuration Settings). Unit operation will be disabled. “Fd” (see Diagnostic Codes) will appear on the display. This allows the room to quickly recover to a comfortable temperature when the room is occupied.

WARNING

TO PREVENT PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK, UNPLUG THE UNIT AT THE WALL OUTLET OR TURN OFF POWER AT THE FUSE BOX OR CIRCUIT BREAKER BEFORE SERVICING THE UNIT. LINE VOLTAGE WILL BE PRESENT AT THE CONTROL BOARD, TERMINALS L1 AND L2, WHENEVER POWER IS APPLIED TO THE UNIT REGARDLESS OF THE MASTER SWITCH POSITION.

Maximum Wire

Length

Wire Size Maximum Length

(AWG) Allowed

#24

400 ft

#22

600 ft

#20

900 ft

#18

1500 ft

#16

2000 ft

REMOTE CONTROL INPUTS

The C, R, GL, W2, Y/W1, B/O, and GH terminals provide control inputs for a “manufacturer-approved” remote wall mounted thermostat. The “B” terminal can be configured to become “O” if needed see Configuration Settings For remote control thermostat operation, refer to the Remote Thermostat Operation section.

FRONT DESK CONTROL (FD1, FD2, EH, IN)

The FD1, FD2, EH and IN terminals provide control inputs for a front desk switch. Shorting across the FD1 and FD2 terminals will disable unit operation. The only control function which will remain active when these terminals are shorted is freeze protec- tion. Any switch which will produce a short circuit across these two terminals can be used as a front desk switch. The contact resistance of the switch, when closed, must be less than 200 ohms for the front desk feature to operate properly. Table 3 shows the maximum wire length and corresponding gage size for

Table 3 - Maximum Wire Length for

Front Desk Switch

AUXILIARY

 

REMOTE THERMOSTAT

DS1 DS2 MS1 MS2 EH IN LS FD1 FD2 TF- TF+ C

R GL W2 Y/W1 B GH

M2

IAT

BLACK

FRONT

DESK

SWITCH

Front Desk Switch Wiring Schematic

10

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Heat Controller EKTH, EKTC manual Control Board User Inputs, Maximum Wire Length for Front Desk Switch
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EKTC, EKTH specifications

The Heat Controller EKTH and EKTC models are advanced heating solutions designed to provide energy-efficient climate control for residential and commercial spaces. These heat pumps combine sophisticated technology with user-friendly features to create a comfortable environment regardless of the outside temperature.

One of the standout features of both the EKTH and EKTC units is their inverter technology. This technology allows the compressor to operate at variable speeds, adjusting its output according to the current heating requirements. As a result, these systems provide consistent heating while consuming less energy compared to traditional fixed-speed units. The inverter technology not only enhances efficiency but also minimizes noise levels, making these heat controllers suitable for quiet environments.

Another significant characteristic of the EKTH and EKTC models is their all-weather performance. These heat pumps are engineered to perform effectively in a wide range of temperatures, ensuring reliable heating even in extremely cold conditions. With advanced defrost technology, these units can operate efficiently without freezing, maintaining optimal performance year-round.

User convenience is also a priority with the EKTH and EKTC systems. Both models feature intuitive digital controls that enable users to set their desired temperature comfortably. Additionally, many versions include Wi-Fi connectivity, allowing for remote access and control through a smartphone app. This feature is ideal for individuals seeking to monitor or adjust their heating systems while away from home.

Energy efficiency is a key aspect of the EKTH and EKTC heat controllers. They are designed with high Seasonal Energy Efficiency Ratios (SEER) and Heating Seasonal Performance Factors (HSPF), which indicate their effectiveness in converting energy into heated air. Energy Star certification is often achieved by these models, making them attractive options for energy-conscious consumers looking to reduce their carbon footprint.

With a compact design, the EKTH and EKTC units can be easily integrated into various settings without taking up much space, allowing for flexible installation options. The sleek aesthetic also ensures that they blend seamlessly with interior decor.

In summary, the Heat Controller EKTH and EKTC models represent a cutting-edge solution to heating needs. They combine inverter technology, all-weather performance, user-friendly features, and high energy efficiency to provide reliable and comfortable heating solutions for any environment. Whether for a home or a commercial space, these heat pumps deliver quality and convenience in climate control.