Lochinvar EcoForce EF100, Installation, Commissioning, User And Maintenance Instructions

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39
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
OMBUSTION
V
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:
Model
Gross
Input
(kW)
Net
Input
(kW)
Plant Room Enclosure
Low
Summer Use
Medium
Summer Use
High
Summer Use
Low
Summer Use
Medium
Summer Use
High
Summer Use
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
EF80 82.2 74.0 148 296 222 370 296 444 370 740 444 814 518 888
EF100 102.2 92.0 184 368 276 458 368 552 458 920 552 1012 644 1104
EF120 123.3 111.0 222 444 333 555 444 666 555 1110 666 1221 777 1332
EF150 153.3 138.0 276 552 414 690 552 828 690 1377 828 1518 966 1656
EF180 184.3 166.0 332 664 498 830 664 996 830 1658 996 1826 1162 1992
9.1.1 Combustion ventilation requirements – EF80 – EF180
C
OOLING
V
ENTILATION
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
Water heater 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
)
EF 58 62.2 56.0 277 277 558 558 N/A N/A
EF80 82.2 74.0 370 370 740 740 148 148
EF100 102.2 92.0 458 458 920 920 184 184
EF120 123.3 111.0 555 555 1110 1110 222 222
EF150 153.3 138.0 690 690 1377 1377 276 276
EF180 184.3 166.0 830 830 1658 1658 332 332
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
ECHANICAL
V
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
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) 2.58 1.35 ± 0.18
9.3.1 Mechanical ventilation flow rates