Immergas Zeus Maior 24 Instruction Booklet
Zeus Maior 24 Instructions
Instruction Booklet
Wall Mounted, Room Sealed, Gas Fired
Combination Boiler with Unvented Hot Water
Storage
For technical assistance, spare parts or service call:
RVR Limited, Kenmare, Co. Kerry Tel: 064 41344, Fax: 064 89520
Read these instructions completely before using or installing the Immergas Zeus Maior 24
gas boiler
LEAVE THESE INSTRUCTIONS WITH THE USER
IMMERGAS ZEUS MAIOR 24
Zeus Maior 24 Instructions
Introduction
Boiler Operating Instructions
The Immergas Zeus Maior 24 boiler is a wall mounted, fan assisted room-sealed combination boiler, incorporating a 60 litre unvented hot water storage cylinder. Heat output is controlled by a modulating gas valve,
with fully automatic direct burner ignition.
The boiler, providing both central heating and domestic hot water supply, is designed for use with a fully
pumped, sealed and pressurised heating system using Natural Gas or LPG. The boiler is supplied for use
with one of these gas types and must be converted before it can be used on another gas. A boiler
equipped for natural gas must not be used on LPG or vice versa.
The boiler is supplied with a pump, diverter valve, pressure relief valve, expansion vessel and pressure
gauge fully assembled and tested.
As supplied, the boiler will automatically modulate to provide central heating outputs between 10.5 and
27.9kW. The maximum output available for domestic hot water is 27.9 kW and provides hot water at temperatures of up to 60°C and flow rates of up to 17 litres/min (at a temperature rise of 60°C)
IMPORTANT
All gas appliances must be installed by a competent and qualified person, in accordance with relevant
clauses of applicable standards and recommendations. These include but may not be limited to the following:-
I.S. 813 Domestic Gas Installations
I.S, 820 Non-Domestic Gas Installations
All relevant Building Regulations.
Local Water Bye Laws
IEE Wiring Regulations
Health & Safety legislation
This appliance meets the requirements of IPX4D, ie degree of protection against moisture.
Failure to install this appliance correctly could lead to prosecution. It is in your own interest and that of
safety to ensure that the law is complied with. Manufacturer's instructions must NOT be taken in anyway as
over-riding statutory obligations.
Key:
1 - Heating temperature selector
2 - Domestic hot water temperature
selector
3 - Boiler over temperature and flue
block red indicator
4 - Power On green indicator lamp
5 - Operating mode and Reset switch
6 - Lockout red indicator lamp
7 - Boiler thermometer
8 - Boiler manometer
Using the Boiler
Before lighting, make sure that the system is full of water and that the manometer (8) indicates a pressure
of 1 - 1.2 bar.
-Open the gas valve on the gas supply to the boiler.
-Turn Operating mode switch (5) to Hot Water or Hot Water/Heating.
N.B.: . With the switch set to the central Heating temperature setting (1) is not active, and the domestic
water temperature is controlled by selector (2).
With the switch set to the central heating temperature is set using selector (1) while selector (2) is
used for the domestic hot water. Turn the selectors clockwise to raise the temperature, anticlockwise to
lower it. Boiler operation is now automatic.
Zeus Maior 24 Instructions
PERFORMANCE:
Nominal Heat Input kw 30.3 (26030)
Min. Heat Input kw 12.2 (10466)
Nominal Heat Output (useful) kw 27.9 (24000)
Min. Heat Output Kw 10.5 (9000)
GAS: G20 G30 G31
Nozzle diam. mm 1.3 0.75 0.75
Supply Pressure mbar 20 29 37
HEATING SYSTEM:
Burner Pressure (Nom Output) mbar 10.5 28.1 36.7
Gas Rate
m³/h/kg/h
3.2 2.39 2.35
Max working pressure heating circuit bar 3
Max working temp heating circuit
°C
90
Adjustable temp heating
°C
43-90
Expansion Tank Total Volume
L
8
Expansion Tank preload
bar
0.8
Water contained in boiler
L
4
Available head with flow rate 1000/l/h
kPa
(mH2O)
29.4 (3.0)
DOMESTIC HOT WATER:
Useful heat output hot water production
kw
27.9
Adjustable temp domestic hot water
°C
20-60
Hot water storage capacity
L
60
Continuous hot water flow rate@ ∆T =30oC
l/min
13.9
Boiler weight filled
kg
138
Boiler weight empty
kg
74
ELECTRICAL:
Electrical connection
v/hz
230/50
Nominal Absorption
A
0.76
Electrical power
W
155
Power absorbed by circulating pump
W
90
Power absorbed by fan
W
35
Equipment electrical system production
-
IP44
FLUE GASES:
G20 G30 G31
Flue gas production @ nom output
kg/h
67 69 71
Flue gas production @ min output
kg/h
71 79 79
CO2 at Q Nom/Min
%
6.5/2.3 7.2/2.4 7.0/2.4
CO at 0% O2 at Q Nom/Min
ppm
64/104 89/112 60/130
NOx at O% O2 at Q Nom/Min
ppm
150/83 240/108 201/102
Flue gas temperature at nominal output
°C
115 117 120
Flue gas at minimum output
°C
85 83 92
DIMENSIONS & INSTALLATION DATA:
Height
mm
900
Width
mm
600
Depth
mm
450
Gas Connection
3/4”
CH Connection
3/4”
DHW Connection
1/2”
Minimum clearances for servicing
Top
mm
200
Bottom
mm
150
Side
mm
10
Front
mm
600
Zeus Maior 24 Instructions
Main Boiler Components
Key:
1 Air (A) and Flue(F) connections 14 Flue Extractor Hood
2 Fan Safety Pressure Switch 15 Expansion Tank
3 Heating NTC limit and regulation sensor 16 Ignition/Detection Plugs
4 Primary Heat Exchanger 17 Domestic Circuit NTC sensor
5 Combustion Chamber 18 Over temperature Safety thermostat
6 Burner 19 Boiler 316L stainless steel
7 Circulating Pump 20 Domestic Circuit 8 Bar Safety Valve
8 Gas Valve 21 Boiler Drain Valve
9 Motor operated 3-way valve 22 Flue Extraction Fan
10 Circulating pump safety flow switch 23 Positive Signal pressure socket
11 System Filler Cock 24 Negative Signal pressure socket
12 Sealed Chamber 25 System 3 Bar Safety Valve
13 Air Vent Valve 26 System drain cock
Gas
CH
Return
CH
Flow
Hot Water
Out
Cold Water
In
Zeus Maior 24 Instructions
Gas Supply
The meter and supply pipes must be sized to deliver the gas rate and pressure given on page 3. The
boiler requires at least a 22 mm (3/4”) gas supply pipe.
The complete installation, including the meter, must be tested for gas soundness and purged as described
in IS 813:2002.
Electrical Installation
The boiler requires a 230V ~ 50 Hz mains supply, fused at 2 A. Polarity of the supply must not be reversed
or the boiler will not function properly. The boiler will not function properly and may be damaged when connected to a generator which does produce a true sine wave type output.
The boiler must be earthed.
There must only be one common isolator, providing complete electrical isolation, for the boiler and any external controls.
Using PVC insulated cable not less than 0.75 mm² (24 x 0.2 mm) to BS 6500 Table 16, the boiler should be
connected to a fused three pin plug and unswitched shuttered socket outlet (both complying with BS 1363),
or a fused double pole switch with a contact separation of at least 3 mm in both poles.
Wiring external to the boiler must be in accordance with the current IEE Wiring Regulations.
General Installation Information
Zeus Maior Control board
35 34 33 32
N L E
Brown
Blue
Green/Yellow
Replace link with
volt free contact from CH
controls
NB: Do not connect 220V !
Mains Lead
IMPORTANT:
External controls connected to the boiler must be of the volt free type and are connected to terminals 34 and 35 as shown above. Connection of a voltage to any boiler terminals other than the
mains lead will result in destruction of the boiler control panel.
Clearances and Air Supply
The boiler does not require any air vents for cooling in the room in which it is installed or when installed in a
cupboard or compartment. The minimum clearances for servicing must always be maintained. Please see
table on page 3.
Note: A cupboard or compartment used to enclose the boiler must be designed and constructed specifically
for the purpose.
Zeus Maior 24 Instructions
Note: a flue diaphragm is supplied with the boiler and
must be fitted depending on the flue arrangement.
Select the appropriate diaphragm from the tables below:
Diaphragm Flue length in
metres
Ø 44 0 - 0.5
Ø 47 0.5 - 1.5
None Over 1.5
Ø 60/100 Horizontal flue systems
Diaphragm Flue length in
metres
Ø 44 0 - 3
Ø 47 3 - 4
None Over 4
Ø 60/100 Vertical flue systems
Diaphragm Flue length in
metres
Ø 44 0 - 22
Ø 47 22 - 29
None Over 29
Diaphragm Flue length in
metres
Ø 44 0 - 0.5
Ø 47 0.5 - 3
None Over 3
Diaphragm Flue length in
metres
Ø 44 0 - 5
Ø 47 5 - 8
None Over 8
Diaphragm Flue length in
metres
Ø 44 0 - 17
Ø 47 17 - 24
None Over 24
Flue System
When the boiler is installed on an external wall, the
standard horizontal concentric 60/100 flue kit will be
used to flue the boiler. This is shown in the diagram.
A flue diaphragm with a 44mm diameter must be
fitted with this flue arrangement.
Please see the following information on the use of
flue diaphragms. Information on extended flue systems is given on the following pages.
Flue Systems
Flue diaphragms
Ø 80/125 Horizontal flue systems
Ø 80/80 separated Horizontal flue
systems
Ø 80/100 Vertical flue systems
Ø 80/80 separated Vertical flue systems
Loading...