Honeywell HCU23 Installation and Operation

Contents

Overview 3

Application 3 Operating elements and display 4

Start-up 5

Inserting batteries (optional) 5 Connecting setpoint adjuster HCU 23 6 Assigning temperature zone 7

Installation 10

Dimensions 11

Operation 12

Changing operating mode 12 Changing setpoint temperature with adjustment dial 13 Disabling setpoint adjuster (child-proofing) 13

Adjusting settings 14

Temperatures and control periods 14 Factory settings 15 Adjusting comfort and economy temperatures 15 Adjusting heating and economy periods 16 Setting date and time 19 Restoring factory settings 20

Informing customers 20

Contents Glossary 21

Technical data 22 Help with problems 23 Notes 25

Overview

For your information

Technical terms are explained in the glossary (Page 20). They are identified in the text by an *.

The setpoint adjuster HCU 23 is a component of the storey controller system HCE 40 from Honeywell. It controls the setpoint temperature* of a room. To do so, it measures the temperature in the room and sends the setpoint temperature information to the storey controller HCE 40. The setpoint adjuster is equipped with a series of convenient functions:

• You can set your own times and choose from two different setpoint temperatures to set up your own heating programme for each day of the week

• The unit can be switched between automatic mode* and manual mode* at any time

• Integrated room temperature sensor

• Automatic switching between summer/winter time

Scope of supply

• Setpoint adjuster

• Operating instructions

Overview

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1. Display of the set heating and economy period*

2. Display of the operating mode: AUTO, MANU or PROG button for changing between AUTO and MANU mode

button for setting the comfort and economy temperature*

button for setting the time program*

6. Display of the comfort or economy temperature

7. Adjustment dial for setting the setpoint temperature or time

Start-up

Batteries are not included in the scope of supply.

Batteries allow the unit to function in the event of a power failure. If batteries are not inserted, the time must be reset after a power failure.

► Open the housing by pressing in the latching nose on the bottom of

the housing while lifting thecover at the same time.

► Use the following batteries types only:

Type Designation Battery life

Mignon battery Alkaline-manganese LR6 AA AM3 2 years

Batteries may not be disposed of with household garbage. You may be required by local law to dispose of discharged batteries in a certain manner.

Ensure that the polarity is correct!

Caution!

Start-up

Setpoint adjusters of type HCU 23 are hard-wired.

Observe the zoning plan* of the storey controller and the switching of the time programs when connecting the setpoint adjuster.

Example: Connection to temperature zone 5

1. Setpoint adjuster

HCU 23

2. HAC 30

(window contact)

3. Storey controller HCE 40

456321

(connectors 13 to 25)

4. Temperature zone 5

TW Temperature

selector input RF Room sensor input KR Boiler regression

13 14 15 16 17 18 19 20 21 22

TW KR B- B+B+

Px Voltage supply

13.8 V AC

⊥ Ground

Start-up

You can assign each temperature zone* of the storey controller to the setpoint adjuster. Connection and assignment occur via the cabling. The HCU 23 functions as a setpoint adjuster* and time program transmitter*.

Assigning setpoint adjuster as setpoint transmitter

► Lay out the zoning plan* of the storey controller. ► Attach the connector of the setpoint adjuster to the connectors of the

storey controller as shown in the diagram on the following page.

If you are using only one four-lead cable, you must bridge terminal 19 to a ground connection (e.g. terminal 17). You can renounce the ground connection of the storey controller (terminal 5).

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