Atlantic Boilers RELAX DIGITAL 6 Installation and operation manual

ATLANTIC 2000 - boilerplant sales ACM ATLANTIC - commissioning and maintenance ATLANTIC 4422 – spares
Atlanc 2000 Registered in England Company No: 1477687 Vat Reg No: 306 0653 89
PO BOX 11, ASHTON UNDER LYNE, OL6 7TR T: 0161 621 5960 E: technical@atlancboilers.com www.atlancboilers.com
RELAX DIGITAL
ELECTRIC BOILER
OPERATING & MAINTENANCE MANUAL
MODELS 6 - 9 - 12 - 18 - 24
01/2008 CODE: 560965 CE Direcve 2006/95/CEE
Brish Standard EN 60335-1 (C73800)

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CONTENTS
1). INTRODUCTION…………………………………………………………………..………………………..PAGE 3
1.1) British Standard requirements
1.2) Description
2). ELECTRICAL ARRANGEMENTS………………………………………………………………………..PAGE 4
2.1) Electrical Power circuitry
2.2) Voltage couplings
2.3) Relax Digital (6, 9 & 12kW series)
2.4) Relax Digital (18 & 24kW series)
2.5) External terminals
2.6) Control Panel fascia
3). COMMISSIONING……………………………………………………………………………………….....PAGE 7
3.1) Precautions
3.2) Setting controltemperatures
3.3) Modifying the setting
4). RELAX DIGITAL ACCESSORIES………………………………………………………………………….PAGE 8
4.1) List and performance of accessories
5). HYDRAULIC SYSTEM PERFORMANCE……………………………………………………………...PAGE 9
5.1) General requirements
5.2) Essential components
5.3) Combined space heating & domestic hot water systems
5.4) Bio-energy system with Relax Digital as back-up
5.5) Weather-compensated Relax Digital systems
6). DELIVERY and OFF-LOADING………………………………………………………………..…………PAGE 11
7). MAINTENANCE……………………………………………………………………………………………….PAGE 11
8). GUARANTEE……………………………………………………………………………………………………PAGE 12
9). IDENTIFICATION OF SPARE PARTS…………………………………………………………………..PAGE 13
10). FAULT DETECTION…………………………………………………………………………………….…..PAGE 13

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1). INTRODUCTION
1.1). British standard & other requirements
The Relax Digital electric boiler is designed to operate in sealed space heating circuits with
maximum static pressures up to 4BARS.
The Relax Digital electric boilers satisfy Class 1 earth connections toIP21/IK08
The following standards also apply :-
EN 95-1081 to guarantee correct materials which ensure safety for personnel & animals
Directive 2006/95/CEE
BS EN 60335 – 1 (classification C 73800, 1st part – general regulations)
The Relax Digital electric boiler must be sited with ambient temperatures below 30degC
The Relax Digital electric boiler must be sited with ambient temperatures above 10degC
The Relax Digital electric boiler must not be sited in a corrosive atmosphere
The Relax Digital electric boiler must not be sited externally
1.2). Description
RELAX DIGITAL Dry weight – 22kgs; water content – 16litres
1
-
control panel f
ascia
2 - cabinet ventilation grilles
3 - heating flow 40mm
4 - thermostat/sensor pockets
5 - immersion heaters
6 - heat exchange volume
7 - heating return 40mm
8 - power cable entry
9 - control cable exit/entry
10- top entry for electrical
Inspection & repair

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2). ELECTRICAL ARRANGEMENTS
2.1) Electrical power circuitry
The Relax Digital can accept up to 415volts 3phase and neutral, on 50Hz & 60Hz
The Relax Digital must have an automatic cut-out against failure of the neutral isolation
The automatic cut-out must conform to BS C 15100 – protection are indicated below
Correct connection of the earth terminal is absolutely essential
2.2) Voltage couplings
Coupling of the plate arrangement, for the single & 3phase supplies, are shown below
The horizontal view of the boiler shows the immersion heater positions and the plate
Arrangement alongside, where the different couplings are made.
Power
output
Amperes protection per phase Cable size in mm2
415V
3PH 240V 1PH 415V 3PH 240V 1PH
6 kW 10 A 30 A 2.5 6
9 kW 16 A 50 A 4 10
12 kW 20 A 63 A 4 16
18 kW 32 A - 6 -
24 kW 40 A - 10 -
415 Volts 3 phase &
neutral 240 Volts single phase

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2.3) Relax Digital (6, 9 & 12kW series)
2.4) Relax Digital (18 & 24kW series)
Cartridge fuse types – 6, 9, 12, 18 & 24kW
Cylindrical 8.5mm dia x 31.5mm long
Relax F1 type aM F2 type gG
2x 1amp 2x 1amp
Step 1
Step 2
Step 1
Step 2

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2.5) External terminals
Terminals 1 & 2 - remote stop/start
-Pump stop/start
-Room thermostat
Terminals 3 & 4 - enable stage one
Terminals 5 & 6 - enable stage two
Relax Stage one Stage two
6 kW 4 kW 2 kW
9 kW 6 kW 3 kW
12 kW 8 kW 4 kW
18 kW 9 kW 9 kW
24 kW 12 kW 12 kW
2.6) Control Panel fascia
1. Limit thermostat 95degC – manual re-set
2. Controller XT120C
3. On/Off manual switch (with light)
4. Relay 12 (with light)

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3). COMMISSIONING
3.1) Precautions
ESSENTIAL - a safety valve at 3BARS, an automatic air vent and an expansion vessel
a). make sure that the heating system is primed with water
b). check the pump for circulation
c). check the boiler for electrical power
d). press the ON/OF button
e). check the two-stage output switching
f). switch back to the first stage
3.2) Setting control temperatures
Setting the control – stage 1 = 80degC; stage 2 = 75degC
PROCEDURE
SET 1 – stage one SET 2 – stage two
SET 1 – temperature must be greater than SET 2
Minimum temperature is 20degC
Maximum temperature is 90degC
Possible resetting ofSET 1 is 3degC belowand allow 3 minutes to reset
Leave the settings as providedat the Factory
3.3). Altering the settings
A). Touch SET 1, hold for 5 seconds – light 6 illuminates
B). Make up & down adjustments on 3or 4
C). Touch SET 1 to fixthe setting
Main screen flashes acceptance and light 6 goes out
After about 10seconds, the actual measured temperature is given
D). Touch SET 2,hold for 5 seconds– light 6 illuminates
E). Make up & down adjustments on 3 or 4
F). Touch SET 2 to fix the setting
Main screen flashes acceptance and light 6 goes out
After about 10seconds, the actual measured temperature is given
ALARM SIGNALS
Alarm light 7 ignites and the main screen signals :-
< 000 > faulty thermostat sensor
< HA > high temperature lockout
< LA > low temperature recorded
1 - 7 weekdays setting
2 - touch change control band
3 - touch control setting positive
4 - touch control setting negative
5 - indication of touch control –
light means action
6 - light means controls in action
7 - light means alarm

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4). RELAX DIGITAL ACCESSORIES
ITEM 1 – 95degC temperature & pressure relief valve
ITEM 2 – expansion vessel – minimum size 12 litres
ITEM 3 - circulating pump
ITEM 4 - flow control switch
ITEM 5 - 3BARS safety valve plus pressure gauge

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5). HYDRAULIC SYSTEM PERFORMANCE
5.1) General requirements
The RELAX DIGITAL electrical boilers must be installedaccording to :-
(i) Therecommendations of this manual
(ii) The recommended BS and BSRIA codes of practice
(iii) TheAtlantic Boilers commissioning check list
5.2) Essential components
(i) Easy access for delivery and eventual removal of the RELAX DIGITAL boiler
(ii) Adequate space around the RELAX DIGITAL boiler for installation & maintenance
(iv) It is essential to install
a safety valve, a temperature & pressure relief valve
an automatic air vent & isolating valve
a combined drain & sludge valve
a heating flow & return at 40mm
Pay attention to the following precautions
Do not mix copper and galvanised steel in the installation
Do not cover over the ventilation louvres on the RELAX DIGITAL boiler
Do not prevent full water circulation in the RELAX DIGITAL boiler
Full circulation – 6 & 9kW = 0.07l/sec – 12, 18 &24kW = 0.14l/sec
Observe maximum working pressure of 4BARS
Protect the RELAX DIGITAL boiler with
Protect the RELAX DIGITAL boiler with correctly-rated earth connections
ENSURE that the RELAX DIGITAL immersion heaters are fully immersed in water
5.3) Combined space heating & domestic hot water supply system
1. RELAX DIGITAL boiler
2. Shunt pumps
3. Space heating pump
4. 3-way mixing valve
5. Existing boiler, if on site
6. Domestic hot water primary pump
7. Domestic hot water calorifier

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5.4) Bio-energy system with Relax Digital as back-up
Install a 2-position 3-way valve in the existing heating flow
Install a room thermostat (TA-18.5degC) controlling gas/oil boiler & 3-way valve
If TA is less than 18.5degC, 3-way valve is in position B, gas/oil boiler is on
If TA is more than 18.5degC, 3-way valve is in position A, gas/oil boiler is off
Install second room thermostat at 19degC to control the Relax Digital
Set each boiler flow temperatureat same value
5.5) Weather-compensated Relax Digital systems

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6). DELIVERY and OFFLOADING
Keep the RELAX DIGITAL in its original packing until itarrives onsite
The ambient temperature must be maintained between 10degC & 50degC
The relative humidity must be maintained between 30% & 80%
Arriving on site, the RELAX DIGITAL must be handled safely
Make use, if possible, of the factory pallet & a fork truck
Make use, if possible, of the RELAX DIGITAL lifting eyes
7). MAINTENANCE
Themaintenance intervals can be predicted for each installation
AT COMMISSIONING
Check the cold feed& expansion system operates correctly
Check all immersion heater couplings are sound
Manipulate & check the safety & temperature/pressure relief valves
If the high temperature limit locks out, correct any fault & reset by hand
ANNUALY
Check all immersion heater couplings are sound
Flush out the immersion heater cells
Check all automatic air vents, safety & relief valves, thermostat switches
Check the shunt pump circulation
DO NOT
Stop the pump whilst the boiler is operating
Release water from the system whilst the boiler is operating

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8). GUARANTEE
THE GUARANTEE ON ATLANTIC BOILERS
This GUARANTEE is to the PURCHASER of the Boiler(s) who is deemed to be the INSTALLER of the
Boiler(s). If the Boiler(s) is(are) purchased by the EVENTUAL USER who then arranges to install the
Boiler(s), the EVENTUAL USER is deemed to be the INSTALLER. The details of the GUARANTEE are given
to assist the INSTALLER in obtaining effective action within the GUARANTEEand they are in addition to
the INSTALLER’S Legal Rights under the relevant statutory enactmentsfor the time being in force in
England, Scotland, Wales and Northern Ireland.
GAS, OIL or ELECTRICAL EQUIPMENT
The Replacement orRepair of the item, including the Cost of its Delivery to the site of the installation or
its equal, provided that the Defect or Flaw occurs within one Calendar Year of the Commissioning Date.
REMOVABLE COMPONENTS OF THE BOILER ASSEMBLY (other than thegas, oil or electrical equipment)
The Replacement or Repair of the item, including the Cost of its Delivery to the site of the installation or
its equal, provided that the Defect or Flaw occurs within two Calendar Years of the Commissioning Date.
THE MAIN BODY OF THE BOILER
The repair of any Defect or Flaw in the Main Body of the Boiler including any necessary removal or
replacement of thatpart of the Boiler on site if the Defect or Flaw occurs within five calendar years of the
Commissioning Date
DEFINITIONS
The effective actions stipulated in this guarantee are subject are subject to the PURCHASER complying
completely with the following :-
1. The Boiler(s) is(are) installed according to the Recommendations of
the Atlantic Boilers’ Manual,the Recommended Codes of Practice of the EEC and the Atlantic
Boilers’ Commissioning Check List.
2. The Commissioning of the Boiler(s) by an Engineer authorised by
Atlantic Boilers, and regular servicing & maintenance according to the Atlantic Boilers’ Manual &
Service Booklet.
3. The Payment in Full by the Purchaser, unless otherwise agreed, of the invoice for the Supply and
Delivery of the Boiler(s) to site, any other relevant invoices connected with the boiler positioning
and fixing, and the invoices for commissioning and any correction of installation error.
4. The Presentation at the time of a Claim under the Guarantee, of the Boiler Registration number,
the Commissioning Record and the necessary information for defining any Replacement Part.
5. When a Replacement Partis supplied for a Defective Item, the Defective Item mustbe returned
to Atlantic Boilers at their Head Office within 6 weeks of the Date of Notification of the Defect
and
must be carefully labelled with Registration Number of the Boiler together with the Name and
Order Reference of the Purchased of the Boiler. If this is not complied with, the Purchaser will be
charged with the Cost of the Item and its Delivery.
21/02/2012.MW

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9). IDENTIFICATION OF SPARE PARTS
Description Code
Heating element 2kW (for 6kW RELAX) 790 082
Heating element 3kW (for 9 & 18kW) 790 083
Heating element 4kW (for 12 & 24kW) 790 084
Set of 5 gaskets 2565
Power relay (KA1 – KA2) 582 062
Main Circuit Breaker (11 – 12) 585 003
Limit thermostat 581 104
Controller XT120C 583 042
Temperature sensor 583 024
10). FAULT DETECTION
Be sure to switch off the boiler, whilst examining any component fault
FAULT ACTION
Control panel lights areoff Check powerto the immersion heater
couplings
The control panel screen is off
Check circuit breaker 11 position
Check fuse F1 is sound & the limit
thermostat is set
The pump does not revolve Check fuse F2
If the fault persists Call in a qualified engineer