Lochinvar CP-M Series, Инструкции по установке, пусконаладке и обслуживанию

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9.2 COOLING VENTILATION
When used as a type C appliance, installed in a compartment or an enclosure, cooling ventilation should be provided as follows:
Model
Input
(Gross)
kW
Input
(Net)
kW
Enclosure/Compartment Enclosure/Compartment
Boiler Room
(Direct to Outside) (To Internal Space)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
CP-M+60 62.2 56.0 280 280 560 560 N/A N/A
CP-M+80 82.2 74.0 370 370 740 740 148 148
CP-M+100 102.2 92.0 460 460 920 920 184 184
CP-M+120 123.3 111.0 555 555 1110 1110 222 222
CP-M+150 153.3 138.0 690 690 1380 1380 276 276
CP-M+180 184.3 166.0 830 830 1660 1660 332 332
TABLE 9.3 COOLING VENTILATION REQUIREMENTS
When used as a type B appliance, provision for cooling ventilation is included in the combustion ventilation allowance.
9.3 MECHANICAL VENTILATION
In situations where combustion air cannot be provided by the means of ventilation grilles, it can be supplied by a fan. The
minimum flow rate for the fan should be in accordance with
Table 9.4 .
If required, extract air can also be through the use of a fan. When sizing the extract fan, the extract flow rate should be calculated
by subtracting the difference volume (from
Table 9.4 ) from the actual supplied volume of inlet air. If therefore, a larger than
required inlet volume is provided, the extract flow rate will need to be increased accordingly.
If the ventilation discharge from the plant room is through the means of simple openings relying on thermal effects, the minimum
free areas of the openings and any associated grilles should be as specified for natural ventilation (see Section 9.1:
COMBUSTION VENTILATION ). The ventilation openings shall be at high level and the air supply shall be at low level.
NOTE: VENTILATION MUST NOT BE PROVIDED THROUGH NATURAL INLET AND MECHANICAL EXTRACT AS THIS
WILL CAUSE A NEGATIVE PRESSURE WITHIN THE PLANT ROOM AND MAY LEAD TO THE PRODUCTS OF
COMBUSTION BEING DRAWN INTO THE PLANT ROOM.
Appliance Type
Flow rate per kW total rated net input (m
3
/h)
Minimum Inlet Air
(Combustion, Ventilation)
Difference between Inlet and Extract
Air
(Inlet minus Extract Ventilation)
Without draught diverters.
(with or without draught stabilisers)
2.60 1.35 ± 0.18
TABLE 9.4 MECHANICAL VENTILATION FLOW RATES
9.3.1 WORKED EXAMPLE – MECHANICAL INLET/NATURAL DISCHARGE
Lochinvar CP-M+100
Heat input (net):
= 92.0 kW
Minimum combustion air flow rate:
= 92.0 x 2.6 m
3
/h = 239.2 m
3
/h
Ventilation grille size (high level): = 184 cm
2