Cli-mate CLI-AP30 Especificaciones descargar pdf (Pagina 23)

3.8.3. Boiler Boosting

a) Controlling Boiler Operation: Boiler operation can be regulated by the solar controller using the

thermostat function, which activates the circulation pump when the tank temperature drops below a preset

level. The boiler system may already have its own boosting controls to achieve the same function. Use the

control method that will provide the simplest, most reliable and safest operation. Refer to the manufacturer’s

specification for the boiler for detailed operation guidelines.

b) Flow Control: If a boiler or tankless heater that requires circulation to operate is used, the pump must

be listed on the Apricus Schematics and Parts List for the specific Solar Water Heating Model as it can

provide a flow rate of 3-4 gallons per minute while overcoming the manufacturer’s listed pressure drop in

the heater. The thermostat function of the Apricus controller can be used to control this pump. See section

6.6 for details.

Refer to Apricus OG-300 System Schematics and Parts Lists for more information.

3.9. Isolating Parts of Piping

a) Direct Flow: Direct flow system design MUST incorporate both the ability to isolate the solar loop from

the rest of the water heating system AND to then drain the solar loop empty. This allows maintenance and

repair of the collector system without shutting down the entire hot water system. Install isolation ball valves

and drain valves on both the Supply (Flow) and Return Lines inside the mechanical room. When isolating

the solar loop, open the drain valves immediately after isolating the loop, otherwise pressure could build up

to dangerous levels. An appropriately piped, pressure relief valve must be installed on the collector side of

the isolating valves to prevent damage from occurring from unintentional isolation (by the homeowner, etc).

b) Closed Loop: A closed loop system is already isolated from the main’s pressure hot water heating

system, but the system should also have the ability to isolate the pump so that the whole system does not

have to be drained if the pump is changed. When isolating a single tank system, the isolation valves located

on the supply and return of the pump station should be used.

󱚡 WARNING

When isolating any section of pipe it is essential that pressure be released by opening a

drain valve or loosening a ﬁtting. Failure to release pressure on an isolated section of pipe,

especially if that includes a solar collector, could result in dangerously high pressures and

temperatures.

3.10. Operating Limits

a) High Temperature Limits: The high temperature limits of all components in the system must be known

and MUST NOT be exceeded. Any components in close proximity to the collector, especially, on the Return

Line, can be exposed to 30 or 40 second periods of up to 320

F (160

C) temperatures, when the pump turns

ON after stagnation. The following components, in particular, must be high temperature rated, but this list is

by no means exclusive:

- High-point ball valve (used for auto-air vent during system charging)

- Pipe insulation (either high temp EPDM or fiberglass)

- Roof flashing, if in direct contact with copper pipe

- Soldering material must be rated to more than 480°F (250

C) within 24” linear from collector header

- Washers or seals used in any quick-connect, compression or threaded fittings etc.

- Heat transfer fluids

Apricus solar collectors will not be damaged by thermal shock.

b) High Temperature Controller Setting: Some controllers may have a high temperature setting which will

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