cylinder.
●
Open the mains stop cock to fill the unit. When water flows from
the tap, allow to run for a few minutes to thoroughly flush through any residue,
dirt or swarf, then close the tap.
●
Open successive hot taps to purge the system
of air.
page 21
6.5 SOLAR PRIMARY
CONNECTION TO THE SOLAR PRIMARY CIRCUIT The lower (Solar)
coil of the cylinder must be connected to a fully pumped solar primary circuit.
The connections are suitable for a 28mm copper pipe direct to compression
fittings. The connections are also threaded 1 ¼" BSP female parallel should
BSP connections be required.
The solar primary circuit must have its own dedicated circulating pump,
thermal and safety controls which must be installed as per the manufacturer's
instructions.
CONTROL OF SOLAR PRIMARY CIRCUIT
Temperature control of the Solar cylinder must be carried out using a suitable
proprietary solar differential temperature controller. The cylinder temperature
sensing probe (usually supplied with the solar differential temperature
controller) should be inserted into the pocket provided on the Solar cylinder and
its cable secured using the cable clamp supplied.
The solar controller and solar primary circulation pump must be wired via
the over-temperature cut-out mounted in the lower solar controls housing
(see figure 15, below). This will ensure that the heat input to the solar coil
is interrupted in the event of the cylinder over-heating. There must also be
suitable Check (non-return) valves installed in the solar primary flow and return
to prevent the possibility of any thermo-syphoning if the solar circulation is
stopped.
Connection to the solar differential temperature controller should be in
accordance with the manufacturer's instructions. The controller should be set
to give a recommended cylinder temperature of approx. 65°C - 70°C otherwise
nuisance operation of the thermal cut-outs may occur.
