25
10.0
WATER CONNECTIONS
10.1
GENERAL
Adaptors are required to convert the NPT (male) thread on the heat exchanger to BSP (female). These
adaptors can be found in the packing carton. The BSP section of the adaptor is indicated with blue paint.
EcoKnight™ water heaters require a minimum flow rate and should also be supplied with separate storage vessels.
Suitably sized pumps and separate storage vessels are available from Lochinvar Limited as ancillary options.
Note:
Lochinvar Limited recommends the use of glanded pumps.
Recommended pipework layouts are available for different water heater and storage vessel combinations. Please
contact Lochinvar Limited for details.
The requirements of minimum water flow are given in
Table 10.2
. Recommendations for the water circulation system
are given in
BS6644
and
CP 342
. The following notes are of particular importance.
1.
When the unit is being utilised as a direct-fired water heater it is designed for use with a direct type storage
vessel. Contact Lochinvar Limited for help in sizing the storage vessel
2.
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.
3.
Drain valves must be located in accessible positions that will permit draining of the entire system including
the unit and the storage vessel.
4.
Tapping sizes for connection to the water system are detailed in
Table 3.1
.
5.
Ideally, individual valves should be fitted to each unit to enable isolation from the system. The arrangement
must comply with the requirements of
BS6644
.
10.2
OPEN VENTED SYSTEM ARRANGEMENT
The Lochinvar EcoKnight™ can be used in an open vented arrangement provided that a vent pipe in accordance with
CP342
,
BS6644
or
BS6700
as appropriate is fitted. The minimum static head requirement for an open vented system
is 0.5 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 EcoKnight™ is to be used in an unvented arrangement, the system should follow the guidance given
in
BS6700
and must comply with
The Building Regulations: 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.
