Honeywell ST9400A, ST9400C Installation Instructions Manual

Mounting

If the ST9400 is replacing an existing ST6400 then the existing wall-plate
and wiring may be used, subject to any required electrical checks.

The Programmer should be mounted at a level where the display can be
seen clearly, (1.2 to1.5m from the fl oor) and the ambient temperature is
within the range of 0 to 40°C. The ST9400 is for use in normal domestic
environments.

CAUTION

Isolate power supply and make safe before wiring the unit to prevent
electric shock and equipment damage. Installation should be carried

out by a qualifi ed electrician or competent heating engineer.

To remove the unit from the wall-plate, slacken the two securing screws at
the bottom of the ST9400 and hinge the unit up to separate the two halves.

50022736-005 A
© 2007 Honeywell International Inc.

ST9400A & ST9400C Programmer

INSTALLATION INSTRUCTIONS

50022736-005 A

Introduction

ST9400 is an Electronic Programmer which provides accurate time
control for central heating systems with separate programmes for
heating and hot water. ST9400A is a 1-day version and ST9400C is a
7-day version.

ST9400 is suitable for replacing a wide range of Programmers on the
market, and is a direct replacement for Honeywell ST6400 Programmers
without the need for re-wiring.

ST9400 Programmers can be combined with other Honeywell controls such
as Room Thermostats, Cylinder Thermostats, Wiring Centres and Zone or
Diverting Valves to form a fully automatic central heating control system.

4 1

Honeywell Control Systems Ltd.

Arlington Business Park,

Bracknell

Berkshire

RG12 1EB

Technical Help Desk: 08457 678999

www.honeywelluk.com

Specifi cation

Power Supply: 230V~, 50…60Hz, 10W

Switch Action: 2 x SPDT

Switch Rating: 230V~, 50…60Hz, 3(3)A

Factory set clock

Power Reserve: lifetime battery

Programmes/Settings: permanently stored in NV RAM

Approvals: Conforms to protection requirements of

Directives 2006/95EC and 89/336EC

Mounting Options

RECOMMENDED CLEARANCE DISTANCES:

ABOVE WALLPLATE: 110mm
BELOW WALLPLATE: 100mm
LEFT/RIGHT OF WALLPLATE: 10mm

a. Sur face mounting

concealed wiring

b. Flush switchbox

Fixing holes are
spaced to suit BS4662
requirements

c. Sur face mounting with

surface wiring in
mini trunking

Wiring

ALL WIRING MUST BE IN ACCORDANCE WITH I.E.E. REGULATIONS.
THIS UNIT IS FOR FIXED WIRING ONLY.

A switch, having contact separation of at least 3mm in all poles (formerly
Class ‘A’), must be incorporated in the fi xed wiring as a means of
disconnecting the supply.

The unit is a Class II (double insulated) device. A parking terminal is
provided for external earth continuity.

The system must be appropriately fused. A fuse rated at no more than
3 Amps should be installed.

The unit has 4 knockouts for surface wiring, care must be taken to ensure
that the cable or mini-trunking completely fi lls the knockout hole without
leaving any gaps.

Final Assembly

Clip the unit onto the hinges on the top of the wallplate and hinge down
into position. Tighten the two securing screws using a screwdriver.

Switch on the power – the unit will now be operating according to the
built-in programme. Note : the ST9400 is supplied with a factory set
clock for faster installation .

Refer to ST9400 User Guides for programming details.

Replacement Wiring

If using the ST9400 to replace other Honeywell Programmers, the equivalent wiring terminations are shown in the tables below.

ST6200/ST6300/ST6400 L N 1 2 3 4

ST9400 L N 1 2 3 4

ST699/ST799 L N 3 4 5 6 7 8

ST9400 L N 4 2 not connected 3 1 not connected

ST7100 L N 3 4 5 6 7 8

ST9400 L N not connected 2 4 not connected 1 3

ST7000A L - 2 3 4

ST9400 (see notes 1, 2) L N 1 3 4

Notes: (1) A permanent mains supply must be provided for the ST9400 Programmer.
(2) ST9400 must be confi gured as a Mini-Programmer

Replacing Other Manufacturers’ Time Controls

ST9400 Programmers will mount directly onto many existing manufacturers’ back-plates, without the need for re-wiring. However, they are also
supplied complete with a wiring back-plate, should this not be the case.

Refer to Honeywell for wiring conversion diagrams. (see Wiring Guide document EN3H2393 Issue 12)

Completion Checklist for Installation

1. Check unit powers up correctly, and that the display does not remain blank.

2. Set Heating and Hot Water operating modes to AUTO and switch Heating and Hot Water on and off using the OVERRIDE buttons, to ensure the

system is operating correctly.

3. Check the factory-set day, date, and time are correct and adjust if necessary. Refer to the User Guide for details.

4. If required, enter Installer Mode and adjust Installer Parameters to match the lifestyle and needs of the User. Remember to make a note of these

parameter changes in the Confi guration Data section of the User Guide.

5. Explain the operation of the product to the User and help them to set their Heating and Hot Water programmes. There are 3 built-in profi les that
can be used as a basis for typical User programmes.

6. Explain when the User should contact someone to arrange a Service Visit.

7. Write the date of installation, your name and telephone number in the space provided in the User Guide, in the section ‘Boiler & System Service

Log’

8. Remember to leave the User Guide and Installation Instructions with the User and remind them to keep them in a safe place. This forms part of a
Home Information Pack.

9. If you have confi gured the product as a Mini-Programmer, ensure that you tick the appropriate box on the Contents page of the User Guide, and
complete the appropriate Confi guration Guide section.

This product and its associated documentation and packaging are protected by various intellectual property rights belonging to Honeywell Inc and its subsidiaries
and existing under the laws of the UK and other countries. These intellectual and property rights may include patent applications, registered designs, unregistered
designs, registered trade marks, unregistered trade marks and copyrights.

Honeywell reserves the right to modify this document, product and functionality without notice. This document replaces any previously issued instructions and is only
applicable to the product(s) described.

This product has been designed for applications as described within this document. For use outside of the scope as described herein, refer to Honeywell for guidance.
Honeywell cannot be held responsible for misapplication of the product(s) described within this document.

Manufactured for and on behalf of the Environment and Combustion Controls Division of Honeywell Technologies Sarl, Ecublens, Route du Bois 37, Switzerland by its
Authorised Representative Honeywell Inc.

Ensure the mounting surface is supporting and fully covers the wiring
wall-plate.

2 ST9400A, ST9400C Programmers Installation Guide 3

WIRING CONNECTIONS

ST9400 Internal Wiring

Notes

1. The ST9400 is a Class II (double insulated) device. A parking

terminal is provided for earth wiring continuity, if required.

2. In the Sundial S-Plan, W-Plan, and Y-Plan wiring diagrams,
connections are shown to basic boilers only. For wiring connections
to Pump over-run boilers refer to Boiler manufacturers’ instructions
or to Honeywell for assistance.

3. It is recommended that gravity circulation hot water systems are
fitted with a suitable hot water control valve as shown in the Sundial
C-Plan system. For systems installed without this valve, ST9400
can be configured as a Mini-Programmer. This is done within the
Installer Mode (see page 3 for details). Refer to Honeywell for details
of suitable wiring schematics.

Sundial Plan Wiring Diagrams

Y-Plan

C-Plan

S-Plan

W-Plan

ADDITIONAL PRODUCT FEATURES

Installer Mode

The ST9400 has a special Installer Mode where some features can be adjusted to suit user lifestyle or preferences – these are called installer
Parameters, and are listed in the table below, along with a description of the options that are possible.

INSTALLER PARAMETER Parameter

Number

LoT™ Display

Description

Default Value Range of

Values

Description [LoT™ Display Description]

24hr or am/pm clock display 1 CLOCK MODE 12 12, 24 12 = am/pm display,

24 = 24hr display

[AM-PM]
[24 HOUR]

Configure backlight operation
(backlight consumes no
additional energy)

2 BACKLIGHT 2 0, 1, 2 0 = off,

1 = on if button pressed,
2 = on continuously

[NO B-LIGHT]
[B-L DELAY]
[B-LIGHT ON]

Enable/disable auto time
change

3 AUTO TIME 1 0, 1 0 = disabled,

1 = enabled

[NO CHANGE]
[TIME CHANGE]

* 1-day or 5/2-day or 7-day
operation

4 UNIT TYPE 7 1, 5, 7 1 = 1-day operation,

5 = 5/2-day operation,
7 = 7-day operation

[1-DAY]
[5-2 DAY]
[7-DAY]

Number of ON/OFFs per
day

5 ON PERIODS 2 (for ST9400A)

3 (for ST9400C)

2, 3 2 = 2 on/offs per day,

3 = 3 on/offs per day

[2 PER DAY]
[3 PER DAY]

Select default time
programme

6 DEF PROFILE A A, b, C A = standard,

b = at home,
C = economy

[PROFILE A]
[PROFILE B]
[PROFILE C]

Configure Mini-Programmer 7 MINI-PROG 0 0, 1 0 = standard programmer,

1 = Mini-Programmer

[NO M-PROG]
[M-PROG ON]

** Reset all parameters 8 PROG RESET 1 0, 1 0 = do not reset

1 = default parameters

[RESET OFF]
[RESET ON]

To Enter Installer Mode:

a.

Ensure the slider is in the RUN position, then press
and hold the and buttons together for 8
seconds. Ignore the ‘NOT VALID’ that is displayed
for a few seconds. The message ‘SET UP MENU’ will
show briefly, followed by ‘SET INSTALLER OK ?’

b. Press the button to take you into the Installer Mode

Parameter Menu.

c. Parameter 1 is now available to change. This is to

allow you to change the clock format from 12 hour
AM/PM to 24 hour. At every step, the LoT™ Display
will inform you what the parameter means and what
option you have selected. The parameter number is
shown on the display separated by a colon from the
parameter value.

d. You can change the parameter value by pressing the

or buttons. At this point the description in the
LoT™ Display will change and the parameter value
will flash. If you press the value will stop flashing
and will be saved for use.

e. Press to move to the next parameter available

for editing. The parameter number will change
accordingly.

f. Keep pressing to step around the list of parameters,

and use or buttons to change the parameter
value.

g. Any parameter changes that have been confirmed

with the button will be saved and used.

To Exit Installer Mode:

You can exit Installer Mode at any time by moving the
slider to the next position and then back again to RUN.

Note: Installer Mode will exit automatically after 10
minutes if the slider is not moved.

T6360/T4360
ROOM STAT

2 3 1

L641

CYL. STAT

2 1

C

V4073

MID-POSITION VALVE

BLUE

G/YELLOW

WHITE

GREY

ORANGE

3 AMPS

MAX

L
N

230V~

50...60Hz

BOILER

PUMP

E N L

L
N
E

ST9400

*NOTE 1

N

L 1 2 3 4

1 2 3 4 5 6 7 8 9 10

T6360/T4360
ROOM STAT

2 3 1

L641

CYL. STAT

2 1

C

V4043H

2 PORT ZONE VALVE

HEATING

BLUE

G/YELLOW

BROWN

ORANGE

GREY

V4043H

2 PORT ZONE VALVE

HOT WATER

BLUE

G/YELLOW

BROWN

ORANGE

GREY

3 AMPS

MAX

L
N

230V~

50...60Hz

BOILER

PUMP

E N L

L
N
E

ST9400

*NOTE 1

1 2 3 4 5 6 7 8 9 10

N

L 1 2 3 4

V4043H

2 PORT ZONE VALVE

BLUE

G/YELLOW

BROWN

WHITE

ORANGE

GREY

3 AMPS

MAX

L
N

230V~

50...60Hz

BOILER

PUMP

E N L

L
N
E

ST9400

*NOTE 1

L641

CYL. STAT

2 1

C

N

L 1 2 3 4

T6360/T4360
ROOM STAT

2 3 1

1 2 3 4 5 6 7 8 9 10

T6360/T4360
ROOM STAT

2 3 1

V4044

DIVERTING VALVE

G/YELLOW

BROWN

BLUE

L641

CYL. STAT

2 1

C

3 AMPS

MAX

L
N

230V~

50...60Hz

BOILER

PUMP

E N L

L
N
E

ST9400

*NOTE 1

N

L 1 2 3 4

1 2 3 4 5 6 7 8 9 10

* this parameter is NOT available on ST9400A, which is 1-day operation only.
** this parameter by default has a value of 1, unless you change any other parameter, when it will change to 0. Set it to 1 to reset all parameters back to defaults.

LoT™ Display

Parameter

Number

Parameter
Value

or

Y-Plan, S-Plan, and C-Plan Systems

10-WAY WIRING STRIP 1 2 3 4 5 6 7 8 9 10

Honeywell T6360 ROOM-STAT 2 1 3

Honeywell ELECTRONIC THERMOSTAT

(BATTERY POWERED)

A B

Honeywell WIRELESS THERMOSTAT

(RECEIVER UNIT) *

L N A B

* Wireless thermostat receiver unit MUST have permanent mains power from fused spur to operate correctly

Alternative Wiring Connections for other Honeywell Room Thermostats

W-Plan System

10-WAY WIRING STRIP 1 2 3 4 5 6 7 8 9 10

Honeywell T6360 ROOM-STAT 2 1 3

Honeywell ELECTRONIC THERMOSTAT

(BATTERY POWERED)

A B

Honeywell WIRELESS THERMOSTAT

(RECEIVER UNIT) *

L N A B

Clock

N L 1 2 3 4

3 AMPS MAX

HW OFF HW ON

CH OFF CH ON

N
L

OFF ON OFF ON

Wiring shown as a hot water priority system