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9.2 COOLING VENTILATION
When used as a type C appliance, cooling ventilation should be provided as follows:
Input
Model
(Gross)
kW
SHW45-325CE
43.9
SHW60-325CE
58.6
SHW85-435CE
83.5
SHW115-435CE
117.2
SHW145-435CE
146.5
TABLE 9.3
When used as a type B appliance, provision for cooling ventilation is included in the combustion ventilation
allowance.
10.0
WATER CONNECTIONS
10.1
GENERAL
Recommendations for the water circulation system are given in BS6644 and CP 342. The following notes are of
particular importance.
1.
Circulating pipework not forming part of the useful heating surface should be insulated. Cisterns,
expansion vessels and pipework situated in areas exposed to freezing conditions should also be
insulated.
2.
Drain valves must be located in accessible positions that will permit draining of the entire system
including the unit and any additional storage vessel.
3.
Tapping sizes for connection to the water system are detailed in Table 3.1 Technical Data
4.
Ideally, individual valves should be fitted to each unit to enable isolation from the system. The
arrangement must comply with the requirements of BS6644.
5.
Typical pipework schematics are available from Lochinvar Limited upon request.
10.2
OPEN VENTED SYSTEM ARRANGEMENT
The Lochinvar EcoShield can be used in an open vented arrangement provided that a vent pipe in accordance
with CP 342, BS6644 or BS6700 as appropriate is fitted. The minimum static head requirement for an open
vented system is 1.0 bar.
10.3
UNVENTED SYSTEM ARRANGEMENT
NOTE:
IT IS STRONGLY RECOMMENDED THAT UNVENTED HOT WATER SYSTEMS BE
INSTALLED BY AN APPROVED INSTALLER.
If the Lochinvar EcoShield is to be used in an unvented arrangement, the system should follow the guidance given
in BS6700 and must comply with the Building Regulations 1992: Part G3. A kit of components that have been
suitably sized for the unvented operation of the appliance is available from Lochinvar Limited. For further
information, contact Lochinvar Limited.
10.3.1
TEMPERATURE AND PRESSURE RELIEF VALVE
A temperature and pressure relief valve is provided in the unvented water system kit. This valve has a lift
pressure of 7 bar and a lift temperature of 90°C. The valve must be fitted to the relief valve tapping located on the
rear of the appliance.
The storage vessel relief valve connection should not be used for any other purpose.
Enclosure/Compartment
Input
(Direct to Outside)
(Net)
kW
High
Low
(cm
)
(cm
2
39.6
200
200
52.8
265
265
75.3
380
380
105.6
530
530
132.0
660
660
COOLING VENTILATION REQUIREMENTS
Enclosure/Compartment
(To Internal Space)
High
Low
)
(cm
)
(cm
)
2
2
2
400
400
530
530
760
760
1060
1060
1320
1320
Internal Space/Boiler Room
High
Low
(cm
)
(cm
)
2
2
N/A
N/A
N/A
N/A
152
152
212
212
264
264
21
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