Sealed System Requirements, General | IDEAL INDUSTRIES HE15, HE24

IDEAL INDUSTRIES HE15, HE24 Sealed System Requirements, General, Safety Valve, Pressure Gauge

GENERAL

5 LOW HEAD AND LARGE SYSTEMS WITH EXTENSIVE PIPE RUNS - OPEN VENT

This arrangement is useful for large systems where radiators at the extremities are difficult to vent. This can lead to pumping over with conventional feed and vent arrangements.

The following conditions MUST be observed:

1.The top of the automatic air vent must be below the

cold water level.

2.The static water level (cold) must be at least 200mm above the top of the horizontal flow pipe, fitted as

shown. The vent connection MUST NOT be made immediately off the top of the boiler as venting is made less efficient.

3. The maximum practical length of 22mm cold feed pipe should be used in order to reduce the effective volume of hot system water expanding into the feed/expansion cistern to a minimum.

Note. The pump manufacturers' minimum requirements must be complied with.

All dimensions in mm (in.).

NB. Imperial dimensions are approximate

6 SEALED SYSTEM REQUIREMENTS

Notes.

a.The method of filling, refilling, topping up or flushing sealed primary hot water circuit from the mains via a temporary hose connection is

only allowed if

acceptable to the local water authority.

b.When installing the filling device, it must be

connected as shown to fully comply with the water regulations. This may involve the fitting of an additional WRAS approval isolator valve to the mains supply.

Non-return

valve

Automatic

air vent

Hosepipe

(disconnect

after filling)

Hose unions

Additional

stop valve

1. General

ecl6060

Temporary hose
(disconnect	Double check valve	Hose connector
after filling)	Double check valve
after filling)	assembly
	assembly

a. The installation must comply with the requirements of BS. 6798 and BS. 5449.

b. The installation should be designed to work with flow temperatures of up to 82 oC.

c. All components of the system, including the heat exchanger of the indirect cylinder, must be suitable for a working pressure of 3 bar (45lb/in2 ) and temperature of 110oC. Care should be taken in making all connections so that the risk of leakage is minimised.

2. Safety Valve

A spring loaded safety valve complying with the relevant requirements of BS. 6759 must be fitted in the flow pipe as close to the boiler as possible and with no intervening valve or restriction. The valve should have the following features:

(note direction of flow)

a.A non-adjustable preset lift pressure not exceeding 3bar (45lb/in2).

b.A manual testing device.

c.Provision for connection of a discharge pipe.

The valve or discharge pipe should be positioned so that the discharge of water or steam cannot create a hazard to the occupants of the premises or cause damage to electrical components and wiring.

3.Pressure Gauge

A pressure gauge covering at least the range 0-4 bar (0-60 lb/in2) must be fitted to the system. The gauge should be easily seen from the filling point and should preferably be connected at the same point as the expansion vessel.

icos - Installation & Servicing

HE12, HE15, HE18, HE24 specifications

The IDEAL INDUSTRIES HE series, comprising the HE24, HE18, HE15, and HE12 models, represents a significant advancement in the field of electrical testing and measurement tools. These versatile testers stand out in professional environments for their high accuracy, user-friendly interfaces, and advanced features designed to enhance efficiency and reliability in electrical inspections.

The HE24 is the flagship model, boasting an extensive range of functionalities. It includes advanced digital multimeter capabilities, allowing for precise measurements of voltage, current, and resistance. Its True RMS feature ensures accurate readings, even with non-linear loads. The HE24 also incorporates advanced connectivity options, including Bluetooth technology, enabling users to transfer data wirelessly to smartphones or tablets for further analysis. The large, backlit display enhances visibility in various lighting conditions, making it an ideal tool for both indoor and outdoor use.

The HE18 model, while slightly more streamlined than the HE24, still offers robust capabilities. It features multiple testing modes, including continuity and diode testing, catering to a wide range of electrical tasks. The HE18 also utilizes a user-friendly interface, allowing technicians to navigate easily through various functions. Equipped with a protective rubber housing, this model is durable and built to withstand the rigors of frequent use on job sites.

The HE15 and HE12 models represent the compact, entry-level offerings in the HE series. Designed for the budget-conscious user, these models retain essential functionalities such as basic voltage and current measuring capabilities while prioritizing ease of use. The HE15 includes a simple LED indicator to signal when measurements are being taken, promoting straightforward operation. Additionally, the HE12 features a lightweight design, making it the perfect tool for on-the-go technicians.

All models in the IDEAL INDUSTRIES HE series are engineered with safety in mind, adhering to stringent international testing standards. They provide superior insulation resistance and a high degree of accuracy, mitigating the risks associated with electrical work. Furthermore, their IP-rated enclosures ensure protection against dust and moisture, enhancing longevity.

In conclusion, the IDEAL INDUSTRIES HE24, HE18, HE15, and HE12 series represent a comprehensive range of electrical testing tools that cater to professionals' varied needs. With their combination of advanced features, user-friendly designs, and safety compliance, these models are excellent choices for any electrical technician aiming for accuracy and efficiency in their work.