EPH Controls HRT Istruzioni operative

Installation and Operation Guide

Room Thermostat

HRT

Factory default settings

Specications

LCD Display

Buttons

Wiring

Mounting & installation

Replacing the batteries

Locking the Keypad / Backlight

Menu Function

On / O Function & Adjusting the target temperature

Table of contents

Installation Instructions

Operating Instructions

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

Battery operated non-programmable Room Thermostat

Installation Instructions

2HRT

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

EPH Controls Ltd.

Specications

Power supply / Input: 2 x AA Alkaline Batteries

Power consumption: Operating <0.05W

Standby <0.1mW

Temperature range: 5 … 35˚C

Ambient temperature: 0 … 45˚C

Ambient admissible humidity: 5-95%RH

Contact rating: 8A 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: 1C

4HRT

[1] [2]

[7]

[3]

[4][5]

[6]

[1] Shows the current / target temperature.

[2] Displayed when batteries need to be replaced.

[3] If the keypad is locked, the lock symbol is displayed.

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

symbol is displayed.

[5] When a high or low temperature limit is set, ‘LIM’ is displayed.

[6] Displayed when setback is enabled.

[7] Displayed when delay start is enabled.

LCD Display

EPH Controls Ltd.

Buttons

Handwheel

Reset

Button

Standby Button

6HRT

Wiring

321

COM

230V on Terminal 1: Thermostat works in Normal mode

0V on Terminal 1: Thermostat works in Setback mode

Terminal Connections

Terminal 1 Setback

Terminal 2 Common

Terminal 3 On

EPH Controls Ltd.

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

8HRT

1) Remove the thermostat from its packaging.

2) Choose a mounting location so that the thermostat can measure

the room temperature as accurately as possible.

- Mount the thermostat 1.5 metres above the oor level.

- Prevent direct exposure to sunlight or other heating / cooling

sources.

3) To open the front housing

a) use a philips screwdriver to loosen the screw on the bottom

right of the thermostat.

b) insert and rotate a 3.5mm at screwdriver into the slot on

the bottom left.

4) Wire the thermostat according to the wiring diagram on page 6.

5) Screw the backplate onto a back box or directly to the surface.

6) Close the front housing and tighten the screw on the bottom of

the thermostat.

Mounting & Installation Continued

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