Main Heating Main Heat 12, Инструкция по установке и обслуживанию

Страница: 16 / 83

Fig. 12
6.5 Pump
1. Providing that the cold feed and open vent pipe are positioned correctly (e.g. the system is not prone to pumping over, air entrainment etc.) the pump
may be fitted on the primary return pipe.
page 14
6.6 System Controls
This boiler does not require a bypass.
This boiler does not require a permanent live.
The pump only needs wiring directly to the boiler for fully TRV'd systems.
1. To comply with Part L1 of the Building Regulations the heating system into which the boiler is installed should include the following:
a) zone controls
b) timing controls
c) boiler control interlocks
2. Such a system needs to be fully pumped and must provide independent temperature and time control to both the heating and hot water circuits and
have a boiler interlock.
3. The boiler should be controlled so that it operates on demand only. Where it is proposed to effect control by thermostatic radiator valves, a room
thermostat (or other device such as a flow switch - a flow switch is integral to this boiler) should also be provided to switch off the boiler when there is
no demand for heating or hot water.
4. The interlock for the CH circuit can be provided by either a Room Thermostat or a fully TRV'd system with the pump wired back to the boiler without a
bypass. Connection diagrams for both options for Y and S plan systems are shown.
Y Plan, Room Thermostat System, CH Interlocked By Room Thermostat
At least the Radiator(s) near the Room Thermostat not TRV'd Pump run from Switched Live
By-pass permitted but not required for Part L1 compliance