MHG Heating Wallcon 115 User manual

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Installation and Operating Manual for the
Wallcon 115,125,160

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Section
Page #
1.0
Appliance TypeThere are three outputs within the Wallcon range
3
1.1
Installation Regulations and Requirements
3
2.0
Appliance Warranties
4
2.1
Supplied Components
4
3.0
Technical Data
5
4.0
Dimensions
6
4.1
Installation and Service Clearances
7
5.0
Mounting Information
8
5.1
Case Removal
9
6.0
Electrical Connections
10
7.0
Hydraulic Design Single Unit (Option 1)
11
7.1
Hydraulic Design Single Unit (Option 2)
12
7.2
Hydraulic Design Single Unit (Option 3)
13
7.3
Hydraulic Design Single Unit (Option 4)
14
7.4
Hydraulic Design Single Unit (Option 5)
15
7.5
Hydraulic Design Single Unit (Option 6)
16
7.6
Hydraulic Design Single Unit (Option 7)
17
7.7
Hydraulic Design Single Unit (Option 8)
18
8.0
Fluing Options
19
8.1
Balanced Flue Terminal Positions For Boilers Below and Above 70kW Net Input
20
9.0
Filling The System
21
9.1
Expansion Vessel, System Water Quality, Care with the use of Flux
22
10.0
Boiler Controller
23
10.1
Accessing Controller Parameters
24-37
10.2
Weather Compensation Slope
38
10.3
Controller Error Codes
39-41
11.0
Commissioning The Appliance
42
11.2
Combustion System Commissioning
42
11.3
Conversion of the Appliance to Operate on LPG (G31)
43
12.0
Routine Inspection and Servicing
44
12.1
Routine Service Inspection
44
12.2
Routine Cleaning &Maintenance (E:105 Indication)
44-45
13.0
Troubleshooting
46-47
14.0
Internal Wiring
48
15.0
Spares Diagram
49-52
Notes
53

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1.0 Appliance TypeThere are three outputs within the Wallcon range
Please ensure you have the correct unit for the application and where required located correctly within the
cascade prior to beginning the installation.
The product codes for the entire range are:
Product Name
Product Code
Wallcon 115
WALLC115
Wallcon 125
WALLC125
Wallcon 160
WALLC160
1.1 Installation Regulations and Requirements
The installation of Wallcon boilers must be in accordance with the relevant requirements of Gas Safety
(Installation & Use) Regulations 1994, Health & Safety at Work Act, Building Regulations, IEE Regulations,
Construction (Design & Management) Regulations 1994, Local Authority Bye-Laws, National, Fire
Regulations and Insurance Company requirements.
The following Codes of Practice are also applicable:-
BS 5440-1: 2000 Installation of flues and ventilation for gas appliances of rated input not exceeding 70 kW
net (1st, 2nd and 3rd family gases).
Part 1: Specification for the installation of flues.
BS 5440-2: 2000 Installation of flues and ventilation for gas appliances of rated input not exceeding 70 kW
net (1st, 2nd and 3rd family gases).
Part 2: Specification for installation and maintenance of ventilation for gas appliances.
BS 5449: 1990 Specification for forced circulation hot water central heating systems for domestic premises.
BS 6644: 2011 Specification for gas fired hot water boilers of rated inputs between 70kW (net) and
1.8MW(net) (2nd and 3rd family gases).
BS 6798: 1987 Specification for installation of gas fired hot water boilers of rated input not exceeding 60
kW.
BS 6880: 1988 Code of Practice for low temperature hot water heating systems of output greater than 45kW.
Parts 1, 2 & 3.
BS 6891: 1988 Specification for installation of low pressure gas pipework of up to 28mm (R1) in domestic
premises (2nd family gases)
BS 7593: 1992 Code of Practice for treatment of water in domestic hot water central heating systems.
BS 7671: 1992 Requirements for electrical installations. IEE Wiring Regulations.Sixteenth edition.
CISBE Guide reference sections B7, B11 and B13.
CP342 Part 2: 1974 Code of Practice for centralized hot water supply.
GE/UP/2 Gas installation pipework, boosters and compressors on industrial and commercial premises.
IGE/UP/4 Commissioning of gas fired plant on industrial and commercial premises
IGE/UP/10 Installation of gas appliances in industrial and commercial premises. Part 1: Flued appliances.
And any addition prevailing regulation and or code of practice not detailed above.

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2.0 Appliance Warranties
All MHG appliances enjoy a full 24 month warranty as detailed in our terms and conditions.
The guarantee period shall begin on the day of commissioning, or at latest 3 months after delivery has been
made.
The customer shall only be able to claim against MHG under guarantee if the commissioning of the object of
delivery has been carried out by MHG staff or the authorised supplier, If the customer has followed MHG's
instructions relating to the treatment and maintenance of the object of delivery, and if no replacement parts
of outside origin have been fitted.
Parts subject to wear such as ignition electrodes, seals etc. are strictly excluded from the guarantee.
In addition to the above warranties, the Stainless Steel Primary Heat Exchangers carry a 60 month
guarantee against manufacturing or material defect.
2.1 Supplied Components
All Wallcons are supplied with a HWS probe sensor and QAC 34 outside Air Sensor. (To activate direct on
boiler weather compensation)

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3.0 Technical Data
Model
115
125B
160B
Min.
Max.
Min.
Max.
Min.
Max.
Type of Flue Installation
B23,C13,C33,C53,
C43,C63,C83
B23,C43,C53,C63,C83
Gas Category
Fuel Type
G20,G31
Gas Pressure (Min/Max) Natural Gas
mbar
17/25
Nominal Heat Input
kW
27
108.5
17
121
21.5
152
Nominal Heat Output at (80-60°C)
kW
26.1
105.4
16.4
116.2
20.9
146
Nominal Heat Output at (50-30°C)
kW
29.3
116.1
18.4
126
23.4
158.8
Water Operating Pressure
Bar
0.8
6
0.8
6
0.8
6
Maximum Operation Temperature
°C
90
90
90
Water Content
L
11.7
11.7
14.9
Condensing Water Mass
kg/h
16
17.5
22.4
Efficiency & Emissions
Heat Efficiency Qmin(80-60°C)
%
96.8
96.4
97.2
Heat Efficiency Qmax (80-60°C)
%
97.1
96
96.1
Heat Efficiency Qmin(50-30°C)
%
108.4
108.2
109.0
Heat Efficiency Qmax (50-30°C)
%
107.0
104.1
104.5
Partial Load, Return 30°C (Direct Method)
%
107.6
109.2
109.1
Flue gas Temperature (50-30°C)
°C
33
64
31.5
64.8
32.4
62.6
Flue gas Temperature (80-60°C)
°C
59
77
56.3
88
59.4
82.5
Gas Diaphragm (G20-G25)
mm
10.7
-
-
Gas Diaphragm (G31)
mm
7
9.5
9.5
CO2Emissions (G20)
%
8.8
9.3
8.7
9.4
9.2
9.4
CO2Emissions (G25)
%
8.7
9.2
8.8
9.6
-
-
CO2Emissions (G30)
%
10.3
10.9
11.1
11.02
10.3
10.7
NOXEmissions (G20)
mg/kW
h
17.1
51.72
98.76
NOXEmissions (G25)
mg/kW
h
26.43
54.83
102.64
NOXEmissions (G30)
mg/kW
h
38.61
98.97
-
NOXClass
5
5
4
Flue Gas Mass (G20)
g/sec
12.60
48.40
8.03
53.53
9.69
67.24
Flue Gas Mass (G25)
g/sec
12.70
48.90
7.96
52.61
-
-
Flue Gas Mass (G30)
g/sec
12.20
46.30
7.13
50.14
9.64
65.90
Gas Consumption (G20)
m3/h
2.90
11.50
1.77
12.52
2.26
15.61
Gas Consumption (G25)
m3/h
3.30
13.40
2.10
14.61
-
-
Gas Consumption (G30)
m3/h
0.80
3.40
0.67
4.91
0.89
6.14
Fan Speed (G20)
rpm
1650
5850
1300
6400
1400
7250
Fan Speed (G25)
rpm
1650
5850
1300
6400
-
-
Fan Speed (G30)
rpm
1500
5350
1150
6150
1400
7250
Boiler Connections
Boiler flow Connection
“
1 ¼”
1 ¼”
1 ¼”
Boiler Return connection
“
1 ¼”
1 ¼”
1 ¼”
Gas Supply
“
1”
1”
1”
Safety Relief Valve Discharge
“
½”
½”
½”
Condensate Syphon Discharge
Ø
25
25
25
Flue Gas Outlet
Ø
100
100
100
Air Inlet
Ø
100
100
100
Electrical Connections
Power supply
V/Hz
230-50
230-50
230-50
Electrical Power
W
300
300
400
IP Class
IP
X4D
X4D
X4D
Boiler dimensions & weight
Dimensions WxLxH
mm
557x580x865
557x580x865
557x690x865
Weight
kg
92
92
98

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4.0 Dimensions
Label
Connections
Model
Dimensions
F
System Flow –1 ¼”
115
W:557mm L:580mm H:865mm
R
System Return –1 ¼”
125B
W:557mm L:580mm H:865mm
G
Gas Supply –1”
160B
W:557mm L:690mm H865mm
FO
Flue Outlet –Ø100mm
AI
Air Intake –Ø100mm
Sr
PRV outlet –Ø25mm
Con
Condensate Discharge –Ø25mm

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4.1 Installation and Service Clearances
Clearances
Front
Minimum of 600mm
Sides
Minimum of 50mm
Top
Minimum of 250mm
Bottom
Minimum of 250mm

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5.0 Mounting Information
All Wallcons are supplied fully tested and therefore may contain residual test water.
The test water utilised contains additives that will help prevent the pump from sticking and other metals from
oxidising.
Transport
Caution: Damage to the installation due to impacts.
The boiler contains parts which can be damaged by impacts.
During further transport all parts must be protected against impacts
MHG Heating Ltd refuse liability of any damage cause to the boiler as a result of miss handling during on site
transportation.
Caution: Damage to the unit due to it being lifted and carried incorrectly.
Do not hold the boiler over the control panel to lift or carry it.
Mounting
Due to the varied nature of the wall mounting locations/conditions that can be encountered a wall mounting
bracket is not supplied with the Wallcon boilers. Free standing or supported versions are available.
If the boiler is to be raised in to position on a mechanical lifting device, it is essential that the base of the unit
and the components immediate inside are protected from damage by using bracing timbers
To maintain the structural integrity of the appliance the internal components should not be used during the
lifting and positioning of the unit onto the wall bracket.

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5.1 Case Removal
The procedure to remove the case from a Wallcon boiler is detailed below.
Remove the six case retaining screws from the bottom of the boiler as shown in the image below.
Once the screws have been removed pull the bottom of the case forward to disengage retaining
clips.
Once the bottom is free lift the case up and off the locating bolts situated on the top of the boiler.

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6.0 Electrical Connections
Basic electrical connection for all types of Wallcon
The wiring connections of the Wallcon boilers are located within two
terminal boxes mounted to the bottom of the boilers case.
All high voltage wiring is located in the left hand box and the low
voltage wiring in the right hand box.
All wiring via terminal blocks provided.
High voltage Wiring terminals
Power in to Boiler
230 Volts - 50 Hertz
Q2 Heating circuit pump
Live, Neutral, Earth, (Max switching 0.5Amp) (Q2)
Can be used as Multifunctional Output
Q3 Hot water charging pump
Live, Neutral, Earth, (Max switching 0.5Amp) (Q3)
Can be used as a Multifunctional Output
*Additional wiring to be added at commissioning if
required.
Additional outputs can be configured if required.
Low Voltage Wiring Terminals
Room Thermostat
Volt Free Enable, Not Polarity Sensitive, Room
stat/BMS ( <24 Volts) (H5)
0-10V enable *
Polarity sensitive, Max 10Volts, To be configured
at Commissioning, (H3)
Outside Air Temperature Sensor
QAC34 sensor provided for direct on boiler
weather compensation. (B9)
Cascade Sensor
QAD36 strap on sensor, provided on request.
Hot Water Enable
Thermostat or Sensor, to be configured at
commissioning, (B3)
Cascade Communication *
To be wired from Master boiler to all slave boilers
in parallel, polarity sensitive.
*Additional wiring to be added at commissioning if
required.
Additional outputs can be configured if required.
* Screened cable must be used for this connection.

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7.0 Hydraulic Design Single Unit (Option 1)
Electrical Connections Single Unit (Option 1)
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Outside Air Sensor
Input
Outside temperature Sensor. QAC34 sensor
provided
**Room Thermostat
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable
Input
0-10Volt Enable H3
0-10Volts
MHG Pressure Manager
Input
Multifunctional to be configured during
commissioning
<24 Volts
**Only one enable to be used per installation. Volt Free or 0-10.

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7.1 Hydraulic Design Single Unit (Option 2)
Electrical Connections Single Unit (Option 2)
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Heating Circuit Pump
Output
Q2 Central Heating Pump Max 0.5Amp
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Outside Air Sensor
Input
Outside temperature Sensor. QAC34 sensor
provided
**Room Thermostat
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable
Input
0-10Volt Enable H3
0-10Volts
MHG Pressure Manager
Input
Multifunctional to be configured during
commissioning
<24 Volts
**Only one enable to be used per installation. Volt Free or 0-10.

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7.2 Hydraulic Design Single Unit (Option 3)
Electrical Connections Single Unit (Option 3)
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Heating Circuit Pump
Output
Q2 Central Heating Pump Max 0.5Amp
230Volts-50Hz
DHW Pump
Output
Q3DHW Storage Pump Max 0.5Amp
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Outside Air Sensor
Input
Outside temperature Sensor. QAC34 sensor
provided
**Room Thermostat
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable
Input
0-10Volt Enable H3
0-10Volts
DHW Demand
Input
Volt free thermostat or sensor
<24Volts
MHG Pressure Manager
Input
Multifunctional to be configured during
commissioning
<24 Volts
**Only one enable to be used per installation. Volt Free or 0-10.

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7.3 Hydraulic Design Single Unit (Option 4)
Electrical Connections Single Unit (Option 4)
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Heating Circuit Pump
Output
Q2 Central Heating Pump Max 0.5Amp
230Volts-50Hz
3 Way Valve Open
Output
Additional internal wiring required at
Commissioning
230volts-50Hz
3 Way Valve Close
Output
Additional internal wiring required at
Commissioning
230volts-50Hz
DHW Pump
Output
Q3DHW Storage Pump Max 0.5Amp
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Outside Air Sensor
Input
Outside temperature Sensor. QAC34 sensor
provided
**Room Thermostat
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable
Input
0-10Volt Enable H3
0-10Volts
Mixed Circuit Sensor
Input
Additional internal wiring required at
Commissioning
QAD 36 sensor required
<24 Volts
MHG Pressure Manager
Input
Multifunctional to be configured during
commissioning
<24 Volts
**Only one enable to be used per installation. Volt Free or 0-10.

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7.4 Hydraulic Design Single Unit (Option 5)
Electrical Connections Single Unit (Option 5)
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Heating Circuit1 Pump
Output
Q2 Central Heating Pump Max 0.5Amp
230Volts-50Hz
Heating Circuit 2 Pump
Output
Additional internal wiring required at
Commissioning
Max 0.5Amp
230Volts-50Hz
DHW Pump
Output
Q3DHW Storage Pump Max 0.5Amp
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Outside Air Sensor
Input
Outside temperature Sensor. QAC34 sensor
provided
**Room Thermostat HC1
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable HC1
Input
0-10Volt Enable H3
0-10Volts
Room Thermostat HC2
Input
Additional internal wiring required at
Commissioning
Room thermostat, Volt free Enable or 0-10Volt
HC2
<24 Volts
DHW Demand
Input
Volt free thermostat or sensor
<24Volts
MHG Pressure Manager
Input
Multifunctional to be configured during
commissioning
<24 Volts
**Only one enable to be used per installation. Volt Free or 0-10.

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7.5 Hydraulic Design Single Unit (Option 6)
Electrical Connections Single Unit (Option 6)
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Heating Circuit1 Pump
Output
Q2 Central Heating Pump Max 0.5Amp
230Volts-50Hz
Heating Circuit 2 Pump
Output
Additional internal wiring required at Commissioning
Max 0.5Amp
230Volts-50Hz
HC2 3 Way Valve Open
Output
Additional internal wiring required at Commissioning
230volts-50Hz
HC2 3 Way Valve Close
Output
Additional internal wiring required at Commissioning
230volts-50Hz
DHW Pump
Output
Q3DHW Storage Pump Max 0.5Amp
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Outside Air Sensor
Input
Outside temperature Sensor. QAC34 sensor
provided
**Room Thermostat HC1
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable HC1
Input
0-10Volt Enable H3
0-10Volts
Room Thermostat HC2
Input
Additional internal wiring required at Commissioning
Room thermostat, Volt free Enable or 0-10Volt HC2
<24 Volts
Mixed Circuit Sensor
Input
Additional internal wiring required at Commissioning
QAD 36 sensor required
<24 Volts
DHW Demand
Input
Volt free thermostat or sensor
<24Volts
MHG Pressure Manager
Input
Multifunctional to be configured during
commissioning
<24 Volts
**Only one enable to be used per installation. Volt Free or 0-10.

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7.6 Hydraulic Design Cascade System (Option 7)
Electrical Connections Cascade System (Option 7)
Master Boiler
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Heating Circuit1 Pump
Output
Q2 Central Heating Pump Max 0.5Amp
230Volts-50Hz
DHW Pump
Output
Q3DHW Storage Pump Max 0.5Amp
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Cascade Communication
Output
Cascade Module. Screened Cable must be used
Coms
Outside Air Sensor
Input
Outside temperature Sensor. QAC34 sensor
provided
**Room Thermostat HC1
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable HC1
Input
0-10Volt Enable H3
0-10Volts
DHW Demand
Input
Volt free thermostat or sensor
<24Volts
MHG Pressure Manager
Input
Multifunctional to be configured during
commissioning
<24 Volts
**Only one enable to be used per installation. Volt Free or 0-10.
Slave Boiler
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
Cascade Communication
Input
Cascade Module. Screened Cable must be used
Coms

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7.7 Hydraulic Design BMS System (Option 8)
Electrical Connections BMS System (Option 8)
High Voltage
Input/Output
Terminal Description/Label
Type
Mains power
Input
Brown=Live, Blue=Neutral, Yellow/Green=Earth
230Volts-50Hz
Low Voltage
Input/Output
Terminal Description/Label
Type
**Room Thermostat HC1
Input
Room thermostat, Volt free Enable
<24 Volts
**0-10Volt Enable HC1
Input
0-10Volt Enable H3
0-10Volts
**Only one enable to be used per installation. Volt Free or 0-10.

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MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone [phone] Fax [phone] Email [e-mail] Web www.mhgheating.co.uk
010517
8.0 Fluing Options
Flue Type
Description
B23
Open Flued Installation with products of combustion
flued through a wall or roof to outside. Combustion
air taken from the room via adequate ventilation.
C13
A Balanced Flue System/ Room sealed installation.
A concentric flue installed horizontally.
C33
A Balanced Flue System/ Room sealed installation.
A concentric flue installed vertically.
C43
A Balanced Flue System/ Room sealed installation.
Independent air ducted in and products out via a U
or SE duct.
C53
A Balanced Flue System/ Room sealed installation.
Independent air ducted in and products flued out.
C83
A Balanced Flue System/ Room sealed installation.
Air ducted from outside and the products flued out
via a shared stack.

© MHG Heating Ltd
20
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone [phone] Fax [phone] Email [e-mail] Web www.mhgheating.co.uk
010517
8.1 Balanced Flue Terminal Positions For Boilers Below and Above 70kW Net Input
(All measurements are in mm and are minimum clearances)
Terminal Location
BS5440
Boilers with
a rated
Input
<70kW Net
IGE-UP-10
Boilers Input >70kW
<333kW Net
Fan Draught Balanced
Flue
X
IGE-UP-10
Boilers Input >70kW
<333kW Net
Fan Draught&
Open Flued
V
A
Directly below an opening into the building
300
2500
2500
B
Below gutter soil pipes etc.
75
200
200
C
Below Eaves
200
200
200
D
Below balconies or car port roof
200*
Not Recommended**
Not Recommended**
E
From vertical drain or soil pipe etc.
150
150
150
F
From internal or external corners
300
If <2500 use Plume Ext
If <2500 use P/T below#
G
Above ground or balcony level
300
If <3000 use Plume Ext
If <3000 use Plume Ext
H
From a surface facing the terminal
600
23.126 x (kW) + 618.84
23.126 x (kW) + 618.84
I
From a terminal facing the terminal#
1200
19.32 x (kW) + 647.59
19.32 x (kW) + 647.59#
J
From opening in a carport into a dwelling
1200*
Not Recommended**
Not Recommended**
K
Vertically from a terminal on the same wall#
1500
2500
2500#
L
Horizontally from a terminal on the same
wall
300
7.232 x (kW) + 93.708
9.5156 x (kW) + 833.91
M
Above an opening into the building
300
7.232 x (kW) + 93.708
9.5156 x (kW) + 833.91
N
Horizontally to an opening into the building
300*
7.232 x (kW) + 93.708
9.5156 x (kW) + 833.91
P
Above a flat roof (Obstacle> 2500) From
Roof Level
300
4.5675 x (kW) -19.723
4.5675 x (kW) -19.723
P+
Above a flat roof (Obstacle<2500) From
Obstacle Level
300
4.5675 x (kW) -19.723
4.5675 x (kW) -19.723
Q
From an adjacent wall (edge of terminal)
300
If <2500 use Plume Ext
If <2500 use Plume Ext#
R
To an opening into the building
1000
7.232 x (kW) + 93.708
9.5156 x (kW) + 833.91
S
From any other flue terminal#
300
7.232 x (kW) + 93.708
9.5156 x (kW) + 833.91#
T
Above a >200Pitched Roof (BOT)
300
4.5675 x (kW) -19.723
4.5675 x (kW) -19.723
T+
Above a >200Pitched Roof (BOT) (Valley)
300
4.5675 x (kW) -19.723
4.5675 x (kW) -19.723
kW=Net Heat Input. * Positions not recommended. ** Risk assessment required (App 9). (BOT = Base of Terminal). #
Contact MHG
Groups of appliances of 150kW gross input (136kW net input) and above must comply with the Clean Air Act with
respect to the chimney discharge height.
The terminal/s shall be guarded if it is less than 2000mm above the ground or in any position where it may cause injury
to persons resulting from touching a hot surface. Absolute guidance must be sought from the respective regulation.