Lochinvar HERALD HCB116CE, Руководство по установке

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13.0 WATER CONNECTIONS
13.1 GENERAL
Adaptors are required to convert the NTP (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.
The requirements of minimum water flow are given in Section 14.2. Recommendations for the water circulation system
are given in BS6644 and CP 342. The following notes are of particular importance.
1. It is strongly recommended that a low velocity header be used to separate the primary circuit from the
secondary circuit.
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 system are detailed in TECHNICAL DATA.
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 and must incorporate a small expansion vessel and correctly
sized safety valve.
A suitably sized low velocity header or plate separator is available from Lochinvar Limited as ancillary item.
13.2 OPEN VENTED SYSTEM ARRANGEMENT
The Lochinvar Herald can be used in an open vented arrangement provided that a vent pipe in accordance with CP
342 or BS6644 as appropriate is fitted. The minimum static head requirement for an open vented system is 0.5 bar.
13.3 SEALED SYSTEM ARRANGEMENT
If a sealed system arrangement is required, a suitable pressurisation unit is available from Lochinvar Limited on request.
Sealed systems should incorporate a safety valve with a lift pressure no greater than the maximum pressure rating of
any component in the heating system. The maximum working pressure of the boiler is 11.0 bar. A suitably sized
expansion vessel should also be fitted to the system in accordance with BS4814.