International Thermal Research CO105D, Руководство оператора

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3.22 RUBBER HOSE
Most heating specialists now install rubber hose for the heating systems. When properly selected and
installed, rubber hose provides years of service with little or no maintenance.
The insulation provided by rubber hose also helps to control heat loss. If slip-
on foam insulation coverings are used, even less heat will be lost. Generally,
a little heat loss is desired when the hose is run through closets, cupboards,
and storage lockers to help keep things drier.
The typical installation is a single loop running from the heater, through each cabin heater, water
heater, heat exchanger, expansion tank, all in series, to the inlet of the water pump then back to the
heater. On larger installations, a main feed to a 2 or 3 loop manifold is used to split the load and reduce
resistance to flow and distribute heat more evenly to each zone.
Each loop of the system should be a minimum of ¾” I.D. (19mm.) and mains 1 ½” I.D. (38mm.).
Avoid inexpensive heater hose, which can flatten out, collapse, or kink when subject to the normal
operating temperature of the water. The low cost of poor quality hose will be negated by the time and
material required to replace it.
Rubber hose must not come into contact with oil or fuel, which may cause it to soften and swell.
If this is a possibility, insert it into PVC plastic tubing for protection.
1.
Secure the hose to prevent sagging, kinking, or damage. When it passes through a bulkhead or
opening, protect it from chafing or abrasion. If the hose is laid directly on the
hull below the water line, it should be insulated.
2.
If desired, to maximize heat retention, install slip-on foam coverings over the
length of the hose.
3.23 AIR VENTS
Air vents must be installed at strategic points along the water system’s piping where air might
accumulate. An inline bleed assembly (part # 2215), is available for placement
anywhere you may be required to bleed air from the system.
3.24 SHUT-OFF VALVES
Inline shutoff ball valves should be installed on either side of an item to isolate it
so that it can be serviced or replaced without draining the system. When using a
header and branching off with 2 or 3 loops, valves should be used at the start of
each loop to balance the flow through each loop.