Air Supply; Combustion Ventilation; Cooling Ventilation; Mechanical Ventilation - Lochinvar EcoForce EF80 Installation, Commissioning, User And Maintenance Instructions

AIR SUPPLY

The following information is based on single Water heater installations only. If more than one Water heater is being used, BS6644 should be
consulted to calculate the necessary requirements.
C V
OMBUSTION ENTILATION
When used as a Type C appliance, ventilation for combustion is not necessary as the combustion air is ducted directly from outside.
When used as a Type B appliance, the combustion air requirements are as follows:
Gross
Input
Model (kW)
EF80 82.2
EF100 102.2
EF120 123.3
EF150 153.3
EF180 184.3
9.1.1 Combustion ventilation requirements – EF80 – EF180
C V
OOLING ENTILATION
When used as a type C appliance, installed in a compartment or an enclosure, cooling ventilation should be provided as follows:
Input
(Gross)
Model kW
EF 58 62.2
EF80 82.2
EF100 102.2
EF120 123.3
EF150 153.3
EF180 184.3
9.2.1 Cooling ventilation requirements
When used as a type B appliance, provision for cooling ventilation is included in the combustion ventilation allowance.
M V
ECHANICAL ENTILATION
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:). The ventilation openings shall be at
high level and the air supply shall be at low level.
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
Without draught diverters.
(with or without draught stabilisers)
9.3.1 Mechanical ventilation flow rates
Low
Summer Use
Net
Input High Low High
(kW) (cm ) (cm ) (cm
2 2
74.0 148 296
92.0 184 368
111.0 222 444
138.0 276 552
166.0 332 664
Enclosure/Compartment
(Direct to Outside)
Input
(Net) High
kW (cm
56.0 277
74.0 370
92.0 458
111.0 555
138.0 690
166.0 830
Plant Room
Medium High
Summer Use Summer Use
Low High Low
) (cm ) (cm ) (cm
2 2 2
222 370 296 444
276 458 368 552
333 555 444 666
414 690 552 828
498 830 664 996
Low
) (cm )
2 2
277
370
458
555
690
830
Flow rate per kW total rated net input (m
Minimum Inlet Air
(Combustion, Ventilation)
2.58
Enclosure
Low
Summer Use Summer Use
High Low High
) (cm ) (cm ) (cm
2 2 2
370 740 444
458 920 552
555 1110 666
690 1377 828
830 1658 996
Enclosure/Compartment
(To Internal Space)
High Low
(cm ) (cm )
2 2
558 558
740 740
920 920
1110 1110
1377 1377
1658 1658
/h)
3
Difference between Inlet and Extract Air
(Inlet minus Extract Ventilation)
Medium High
Summer Use
Low High Low
) (cm ) (cm ) (cm )
2 2 2 2
814 518 888
1012 644 1104
1221 777 1332
1518 966 1656
1826 1162 1992
Water heater Room
High Low
(cm ) (cm )
2 2
N/A N/A
148 148
184 184
222 222
276 276
332 332
1.35 ± 0.18
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