Delta MCS-1800 Service Manual Page 38
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38
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email info@mhgheating.co.uk Web www.mhgheating.co.uk
020315 Draft
IGE/UP/10 Part 1 Edition 3 Installation of gas appliances in industrial and commercial premises
Guidance for Boiler installations with Inputs in Excess of 1.8 MW net.(2
nd
and 3
rd
family gases)
Open Flued Appliances Installed within an Enclosure (Natural ventilation requirements direct to Outside Air)
System Type &
Operational Time
Grille Location
Heating &/or HWS Operation
< 50% time operation during
summer months
Heating &/or HWS Operation
> 50% < 75% time operation
during summer months
Heating &/or HWS Operation
> 75% time operation during
summer months
High Level (Free Area/kW)
5 cm
2
6 cm
2
7 cm
2
Low Level (Free Area/kW)
10 cm
2
11 cm
2
12cm
2
Room Sealed Appliances Installed within an Enclosure (Natural ventilation requirements direct to Outside Air)
System Type &
Operational Time
Grille Location
Heating &/or HWS Operation
< 50% time operation during
summer months
Heating &/or HWS Operation
> 50% < 75% time operation
during summer months
Heating &/or HWS Operation
> 75% time operation during
summer months
High Level (Free Area/kW)
5 cm
2
6 cm
2
7 cm
2
Low Level (Free Area/kW)
5 cm
2
6 cm
2
7 cm
2
Room Sealed Appliances Installed within an Enclosure (Natural ventilation requirements Via an internal Space)
System Type &
Operational Time
Grille Location
Heating &/or HWS Operation
< 50% time operation during
summer months
Heating &/or HWS Operation
> 50% < 75% time operation
during summer months
Heating &/or HWS Operation
> 75% time operation during
summer months
High Level (Free Area/kW)
10 cm
2
11cm
2
12 cm
2
Low Level (Free Area/kW)
10 cm
2
11cm
2
12 cm
2
Open Flued Appliances Installed within a Boiler Room (Natural ventilation requirements direct to Outside Air)
System Type &
Operational Time
Grille Location
Heating &/or HWS Operation
< 50% time operation during
summer months (Biomass/Solid Fuel
Boiler Additional Free Area)
Heating &/or HWS Operation
> 50% < 75% time operation
during summer months
(Biomass/Solid Fuel Boiler Additional Free Area)
Heating &/or HWS Operation
> 75% time operation during
summer months
(Biomass/Solid Fuel Boiler Additional Free
Area)
High Level (Free Area/kW)
2 cm
2
(3 cm
2
)
3 cm
2
(4 cm
2
)
4 cm
2
(5 cm
2
)
Low Level (Free Area/kW)
4 cm
2
(6 cm
2
)
5 cm
2
(7 cm
2
)
6 cm
2
(8 cm
2
)
1. For lighter than air gases where high and low level ventilation is not practicable and the volume of the space is equal to or greater than 1m
3
per 2kW total net input, it is permitted to install 6cm
2
per kW of total ventilation
at high level only provided more than one ventilator is fitted. This is not permitted for heavier than air gasses
2. For lighter than air gases where the plant room does not exceed 1m
3
per 2kW total net heat input, ducting of ventilation air to low level without mechanical assistance is not recommended
Open Flued Appliances. Modern low radiation losses and low excess air burners
(Mechanical ventilation flow rate requirements direct to Outside Air)
System Type &
Operational Time
Grille Location
Heating &/or HWS Operation
< 50% time operation during
summer months
Heating &/or HWS Operation
> 50% < 75% time operation during
summer months
Heating &/or HWS Operation
> 75% time operation during
summer months
Appliances with draught diverters
High Level Extract
(Difference Between Inlet and Extract Air)
2.07 +/- 0.18 (m
3
/h/kW)
2.07 +/- 0.18 (m
3
/h/kW)
2.07 +/- 0.18 (m
3
/h/kW)
Low Level Inlet
2.8 (m
3
/h/kW)
3.52 (m
3
/h/kW)
4.24 (m
3
/h/kW)
Appliances without draught diverters with or without draught stabilisers
High Level Extract
(Difference Between Inlet and Extract Air)
1.35 +/- 0.18 (m
3
/h/kW)
1.35 +/- 0.18 (m
3
/h/kW)
1.35 +/- 0.18 (m
3
/h/kW)
Low Level Inlet
2.6 (m
3
/h/kW)
3.32 (m
3
/h/kW)
4.04 (m
3
/h/kW)
Where high level/discharge openings are not mechanically assisted, the free area must be calculated at 2 cm
2
/kW net input
All air inlet and extract fans must be fitted with automatic controls (interlocks) causing safety shut-down or lockout of the installed gas burning appliances in the event of an
inlet or extract air flow failure
Document Intended for quick guidance only. Absolute guidance must be sought from IGE/UP/10 Edition 3 directly
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