Issue 2 14/07/16
39
Installation
3
3.31 Water connections
3.31.1 Vented systems
The water heater can be fed from a cold water feed cistern or
static water tank.
A safety valve must be fitted as specified in BS 6644 Clause 9.
Minimum 1 bar water pressure is required to allow correct
operation.
The safety valve must be fitted either directly to an upper tank
tapping or not further than one metre along the outlet flow pipe,
size not less than the safety valve.
There must be no valve separating the heater from the safety
valve.
The size of the discharge pipe must not be less than the nominal
size of the safety valve outlet. It should be self-draining. Any
water discharged must be visible and create no hazard to
persons in or about the building.
A low pressure open vented system can be used or, where the
natural circulating pressure is insufficient, pumped circulation
can be employed.
The heater must be fitted with an open vent pipe which is not
valved and which rises continuously to the open vent. It should
be sized with reference to Technical Data, BS 6644 Clauses 9
and 10 and CP 342. Local Regulations and Bye-Laws must be
observed when installing the system.
Front Cold inlet / Front Hot outlet water connections
Assemble onto the 1½” hot water outlet (front) the required fitting
using a suitable jointing compound.
Assemble onto the ¾ BSP thread, the ¾ BSP coupler socket
and drain cock using a suitable jointing compound.
Water draw-off dead legs should comply with CP 342 Part 2,
Table 1 and BS 6700.
It is recommended that all water connections be made to the
heater(s) using union fittings for ease of servicing. Pipe support
intervals should comply with CP 342, Part 2 Table 4.
After installation of the water system, open the main water
supply valve, flush the system and fill the heater. Open the hot
taps to allow air to escape from the system. When the system is
free of air, close the taps and check for leaks at the thermostats,
drain cock and pipe connections on the heater.
Fig. 17
Hot water service
Overflow
Open vent
Stop valve
Cold water feed
Cold water cistern
Cold water
inlet valve
Secondary return
Bronze pump
Check valve
Note
When using a secondary return circuit, see Fig. 17 for the
location of the return tapping.
Summary of Contents for ECOflo EC230/600
Page 106: ...106 Issue 2 14 07 16 ...