EPH Controls HDT Betriebsanleitung

Installation and Operation Guide

Room Thermostat

HDT

Factory default settings

Specications

LCD Display

Buttons

Wiring

Mounting & installation

Locking the Keypad / Backlight

Menu Function

On / O Function & Adjusting the setpoint temperature

Table of contents

Delay Start Control (On/O)

PO 1 Operating Mode

Nor (Normal Mode)

Time Proportional Integral Mode (TPI)

PO 2 Setting High and Low limits

PO 3 Hysteresis HOn and HO

PO 4 Calibration

PO 5 Setback Mode

PO 6 Frost Protection

Resetting the Thermostat

Mains operated non-programmable Room Thermostat

Installation Instructions

EPH Controls Ltd.

Factory default settings

Contacts: Volt Free

High and Low Temp. limitation: O

Keypad lock: O

Backlight: Auto

Setback: 0.0˚C (o)

Operating mode: Normal

4HDT

Specications

Power supply / Input: 230Vac 50-60Hz

Power consumption: 7mA / 1 Watt

Temperature range: 5 … 35˚C

Ambient temperature: 0 … 45˚C

Ambient admissible humidity: 5-95%RH

Contact rating: 7A 230Vac

Dimensions: 85 x 85 x 36mm

Temperature sensor: NTC 100K

Backlight: White

IP rating: IP20

Pollution degree: 2

Switching dierential: Adjustable from 0.0 – 1.0°C

0.1°C increments

Automatic action: 1A

EPH Controls Ltd.

[1]

[6]

[2]

[3][4]

[5]

[1] Shows the current / target temperature.

[2] If the keypad is locked, the lock symbol is

displayed.

[3] When the thermostat is calling for heat, the ame

symbol is displayed.

[4] When a high or low temperature limit is set, ‘LIM’

is displayed.

[5] Displayed when setback is enabled.

[6] Displayed when delay start is enabled.

LCD Display

6HDT

Buttons

Handwheel

Reset

Button

Standby Button

EPH Controls Ltd.

Wiring

321LN

MAINS SUPPLY

COM

230V on Terminal 1: Thermostat works in Normal mode

0V on Terminal 1: Thermostat works in Setback mode

* If mains output is required terminals L and 2 must be electrically linked.

Terminal Connections

LLive In

NNeutral In

Terminal 1 Setback

Terminal 2 Common

Terminal 3 On

8HDT

Mounting & Installation

Caution!

Installation and connection should only be carried out by a qualied person.

Only qualied electricians or authorised service sta are permitted to open the

thermostat.

If the thermostat is used in a way not specied by the manufacturer, its safety may be

impaired.

Prior to setting the thermostat, it is necessary to complete all required settings

described in this section.

Before commencing installation, the thermostat must be rst disconnected from the

mains.

This thermostat can be mounted in the following ways:

1) Directly mounted on wall

2) To a recessed conduit box

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