Halstead Ace HE24, HE30, HE35 User Instructions

The Halstead Ace HE24, HE30 and HE35 are high efficiency condensing,
fully automatic, wall mounted gas appliances for use with natural gas.
The appliances incorporate a microprocessor based, fully modulating pre-mix gas
control system with direct burner ignition.
The Ace HE24 provides central heating at outputs between 6.0 kW (20,500
Btu/h) and 18.0 kW (61,500 Btu/h) and domestic hot water at outputs between

6.0 kW (20,500 Btu/h) and 24.0 kW (82,000 Btu/h).
The Ace HE30 provides central heating at outputs between 7.2 kW (24,600
Btu/h) and 23.1 kW (78,900 Btu/h) and domestic hot water at outputs between

7.2 kW (24,600 Btu/h) and 30.0 kW (102,400 Btu/h).
The Ace HE35 provides central heating at outputs between 8.3 kW (28,300
Btu/h) and 24 kW (81,900 Btu/h) and domestic hot water at outputs between

8.3 kW (28,300 Btu/h) and 35 kW (119,400 Btu/h).
Heat output is controlled according to demand (in both domestic hot water and
central heating modes) by the fully modulating pre-mix burner control. The
appliance always gives priority to domestic hot water supply. The appliance
incorporates frost protection. However this is not operational when the main
electrical supply to the appliance is isolated. An electro/mechanical 24hr time
clock is fitted as standard.
Gas Consumer Council: The Gas Consumer Council (GCC) is an
independent organization which protects the interests of gas users. If you need
advice, you will find the telephone number in your local directory under 'Gas'.

2

SAFETY

Read these instructions and the user label (fitted on the boiler front panel)
carefully before attempting to operate the appliance. Comply with all
applicable warnings.

Do not interfere with any sealed components

and use the appliance only in accordance with these instructions.

CURRENT GAS SAFETY (INSTALLATION AND
USE) REGULATIONS OR THE RULES IN FORCE.

It is the law that all gas appliances are installed by a competent person in
accordance with the above regulations. Failure to install appliances
correctly could lead to prosecution. It is in your own interest, and that of
safety, to ensure that the law is complied with. If the appliance is
damaged, turn off the appliance and consult a CORGI registered installer.
If it is known or suspected that a fault exists on the appliance it MUST
NOT be used until the fault has been rectified by a competent person.

2.2

ELECTRICAL SUPPLY

This appliance must be earthed.

Supply: 230V - 50Hz fused at 3A.
The method of connection to the mains supply must facilitate complete
isolation of the appliance. Either a 3A fused three pin plug and
unswitched shuttered socket outlet, or a 3A fused double pole switch
having a 3 mm contact separation in both poles, serving only the boiler
(and its external controls), may be used.

2.3

CLEARANCES AND VENTILATION

It is not necessary to have a purpose provided air vent in the room or
internal space in which a room-sealed appliance is installed. Cupboard or
compartment ventilation is not necessary for a room-sealed appliance
providing that the minimum clearances are maintained.
Where an open flued (B23) system is used (for example KIT E 'Chimney
flue liner kit') then an air vent must be provided in the same room or
internal space as the flue duct air inlet with a minimum free-area as stated
in section 3.4 of the boilers installation manual.

4

HOT WATER OPERATION

On a demand for DHW, water flow is detected and the ignition sequence
initiated. The fan and pump will start and the boiler will light.
If the DHW draw off rate is high (over 10l/min.), the appliance will run
continuously at full output until the tap is either turned off, or the flow rate is
reduced, in which case the heat supplied will reduce accordingly to
maintain a steady temperature (55°C max).
Hot water is made available at the appliance outlet almost immediately, but
the final temperature and time taken for the hot water to reach a tap
depends upon the rate at which water is drawn off and the length of the
pipe runs between the boiler and taps.
When the tap is turned off, the appliance after a short period of time will
revert to heating mode if there is a demand. Otherwise the burner will be
extinguished until the next demand for hot water.

1

INTRODUCTION

3

BOILER LOGBOOK

Please ensure that you have a Logbook supplied with your appliance. This
Logbook should be completed by your installer to verify that the correct
installation and commissioning procedure was followed.
Failure to complete the Logbook may result in difficulties should a problem
arise with your appliance during the guarantee period.
This Logbook forms part of the industry's Benchmark code of practice for the
installation, commissioning and servicing of central heating systems. All
CORGI Registered Installers carry a CORGI ID card and have a registration
number. Both should be recorded in your Logbook. You can check your
installer is CORGI registered by calling CORGI on 0870 401 2230.

2.1

5

OPERATING INSTRUCTIONS

Refer to Fig. 1

1) Switch on the electrical supply.

If heating is required, ensure that the clock is set to an ON period (see
diagram) or set the clock over-ride switch to the ON position. Turn up the
room thermostat (if fitted).

2) Turn the control knob to the midpoint between minimum and maximum

setting. The digital display changes from '

o

' to 'c'.

3) When the burner has lit the digital display changes to '

C

' to indicate heating

ON and a small dot will appear in the bottom right corner of the display.

4) Hot water will be supplied as soon as any Domestic Hot Water tap is

turned on and the digital display will change to '

H

' to indicate hot water is
being supplied. A small dot will appear in the bottom right corner of the
display.

5) If the burner fails to light the fan will stop. Initially this may be due to air in

the gas supply. The boiler will automatically have five attempts at ignition.
After the five attempts it may be necessary to RESET the boiler by turning
the control knob fully anti-clockwise to the RESET position and repeat from
step 3.

6) If the digital display reads ‘ ’ it is an indication that the heating or hot

water mode is satisfied, and the boiler is performing a pump over-run
function. This is perfectly normal.

After a hot water draw off the burner may stay on for
a few seconds (see clause 5.8 'Keep hot facility' in
the installation manual)

Priority is always given to Domestic Hot Water supply.

TO LIGHT THE BOILER IN CENTRAL
HEATING MODE

5.1

1

2

LED CODE FAULT/EFFECT REASON

1

Overheated appliance Water temperature greater than 105 °C

2

Differential check faulty/Flame for 15 seconds Zero check faulty DHW or CH

3

No gas or lockout flame signal/Lockout after 5 ignition attempts Low gas pressure. No flame signal on ignition, or loss of signal during operation

4

Flue gas sensor Flue gas temperature greater than 95 °C

5

Defective sensor or thermal fuse Defective flow, return, DHW or flue sensor or open circuit thermal fuse.

6

Defective gas valve/Flame continues after demand ends 5 sec flame signal after burner is switched off

7

Defective fan Missing or Erroneous RPM signal

A

PCB error Internal error
Activate BCC (if fitted) New BCC (if required)
Safety system failure Failure of internal self checking system

E

BCC error (if fitted) Incorrect /missing BCC

O

Water flow failure/Flame for a short period only Sensor temperature differential incorrect

P

Power supply error Low mains voltage
DHW cold Defective DHW thermister or open circuit

(No display)

No light indication Defective power supply

NOTE: FAULT CODES 1 TO 4 MAY BE RESET BY FOLLOWING THE PROCEDURE IN SECTION 5.5 OF THE
INSTALLATION MANUAL, HOWEVER IF ANY OTHER FAULT CODE IS SHOWING PLEASE CONTACT YOUR INSTALLER OR
HALSTEAD BOILERS SERVICE HELPLINE TEL: [phone]

SERVICE HELPLINE: 01926 834834 TRAINING: 01926 834838

Halstead Boilers Limited, 20/22 First Avenue, Bluebridge Industrial Estate, Halstead, Essex C09 2EX.

Telephone: [phone]. Sales Direct Line: 01787 475557. Fax: [phone].

Service Helpline: 01926 834834. Training: 01926 834838.

Email: [e-mail] or [e-mail] or [e-mail]

Website: www.halsteadboilers.co.uk

Halstead Boilers is continuously improving its products and may therefore change specifications without prior notice.

The statutory rights of the consumer are not affected.

08/07 751095

5.6

PRESSURE GAUGE

The pressure gauge on the control fascia panel indicates the central
heating system pressure. If the normal running pressure is seen to
decrease from the original installation pressure of around 1 bar (cold)
over a period of time, then there may be a water leak. In this event
consult a CORGI registered installer.

Do not attempt to fire the boiler if the pressure has reduced
to zero from the original setting.

To ensure continued efficient operation of the appliance, it is recommended
that it is checked and serviced as necessary at regular intervals. The
frequency of servicing will depend upon the particular installation
conditions and usage but in general once a year should be adequate. It is
law that any service work must be carried out by a competent person such
as British Gas or other CORGI registered personnel.

GENERAL CARE

The front panel, being a powder coated white finish should be cleaned
with a damp cloth and mild detergent. Do not use abrasive cleaners.

ROUTINE SERVICING

WARNING

If a gas leak is suspected or exists, turn the gas OFF at the
incoming mains (adjacent to the meter). Do not operate any
electrical switches. Do not operate any electrical appliances.
Open all windows and doors. Do not smoke. Extinguish all
naked lights. Phone the Transco 24 hour emergency number
immediately on 0800 111 999. (Do not call from a mobile
phone).

The boiler is fitted with a condensate trap.
The condensate drain point must not be modified or blocked (see

section 4.6 of the installation manual).

Like all condensing boilers this appliance will produce a plume
of condensation from the flue terminal. This is due to the high
efficiency and hence low flue gas temperature of the boiler. It
is normal and not a fault indication.

6

7

8

PLUMING FROM TERMINAL

9

5.2

CONTROL OF WATER TEMPERATURE

DHW: Hot water temperature is limited to a maximum of 55°C at low draw-off
rates and is not adjustable.
CH: Adjustable via the CH temperature control knob to give radiator
temperatures of between 30°C and 80°C. To operate the boiler more efficiently it
is recommended to set the CH temperature about half way (between '+' and '-').
To avoid setting the control knob temperature to ‘STANDBY’ in summer when CH
is not required, switch the clock over-ride switch to the OFF position OR turn the
room thermostat off.

Note: If the digital display shows a flashing '

C

' the
boiler is in a service mode and the boiler will fire
continuously at minimum input. (See fig.2)

This setting is for the convenience of the
Service Engineer ONLY.

5.3

TO TURN THE BOILER OFF

For short or long periods
Switch the programmer and/or room thermostat switch to the OFF position.
Note: The appliance is fitted with a frost protection device. In the event

of very cold conditions, the pump may operate and the boiler light for a
few minutes to protect the appliance from potential frost damage. This
can only function if the gas and electricity supplies are maintained and
the control knob on the appliance is set to the ‘STANDBY’ position.
This function automatically operates the boiler when the heating system
water reaches temperatures below 5°C.
If either the gas or electricity services are to be isolated during a period
when frost is likely, the water circuits must be drained.

5.4

BOILER OVERHEAT PROTECTION

The appliance is fitted with two water temperature thermisters located on
the flow and return pipes. In the event of overheating, the boiler will shut
down and the digital display will show '

1

'. Allow the boiler to cool, then
briefly turn the control knob fully anti-clockwise to the RESET/STANDBY
position and then back to 'ON' within TWO seconds.
If the fault persists, consult a CORGI registered installer.

5.5

DIAGNOSTIC DIGITAL DISPLAY

Refer to Fig. 2

If the digital display shows an error code between 1 and 4 the boiler is in
lockout condition
To RESET the boiler turn the control knob fully anti-clockwise

to the
RESET/STANDBY position and then back to 'ON' within TWO seconds.
For fault finding refer to diagnostic chart shown on the previous page,
together with the notes given in sections 8.3, 8.4 and 8.5 of the boilers
installation manual.