ACV EVO S 100, Installation, Use And Maintenance Instructions, Page: 25 / 154

EVO S
, Installation, Commisioning and Servicing Instructions
25
EN
4.3.1. Ventilation
BOILERS NOT EXCEEDING 70kW
The ventilation requirements of these boilers is dependent on the type of flue system
used, and their heat input. All vents must be permanent with no means of closing and
positioned to avoid accidental obstruction by blocking or flooding.
Detail reference should be made to BS. 5440 Pt. 2. In IE refer to the current edition of I.S. 813.
The following notes are for general guidance only: If installed as a room sealed appliance
in a room or internal space, then no purpose provided ventilation is required.
If installed as an open flued appliance in a room or internal space, then a permanent air
vent is required. The sizes given below are for vents directly communicating with outside
air. For other situations refer to BS. 5440 Pt. 2. In IE refer to the current edition of I.S. 813
Ventilation Requirements (not exceeding 70kW net Input) when installed in a compartment.
If installed in a compartment, then permanent air vents are required at high and low level.
These vents may communicate direct to outside air, or to a room/internal space. If to a
room/internal space, it must itself be adequately ventilated as above.
BOILERS 70kW and over
Detail reference should be made to BS. 6644 and IGEM/UP/10 for inputs between 70kW
and 1.8MW (net). In IE refer to the current edition of I.S.820. The following notes are for
general guidance only:
If ventilation is to be provided by means of permanent high and low vents communicating
direct with outside air, then reference can be made to the sizes below. For other ventilation
options refer to BS. 6644 and IGEM/UP/10. In IE refer to the current edition of I.S.820.
Open Flued Installations
Required area (cm
2
) per kW of total rated input (net)
Note: Where a boiler installation is to operate in summer months (e.g.DHW) additional ventilation
Room sealed application – min. vent free area (cm
2
) Open flue application – min. vent free area (cm
2
)
To a room or internal space To outside air To a room or internal space To outside air
Boiler size 40 60 40 60 40 60 40 60
High level 410 610 205 305 410 610 205 305
Low level 410 610 205 305 820 1220 410 610
requirements are stated, if operating formore than 50% of time (refer to BS6644) and IGEM/
UP/10.
Room Sealed Installations
A minimum of 2cm2 free area per kW of net heat input at both high and low level is required for
boiler rooms. For enclosures refer to BS6644 and IGEM/UP/10.
The temperature within the boiler room shall not exceed 25ºC within 100mm of the floor, 32ºC at
mid height and 40ºC within 100mm of the ceiling.
Boiler room Enclosure
Low level (inlet) 4 10
Hight level (outlet) 2 5