MICRO-AIR Artic Air 24 Guia de Instalação descarregar pdf (Página 24)

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Proper Expansion Valve Sensing Bulb Placement

As shown in the previous illustrations, consideration has to be given to expansion valve sensing

bulb attachment. Space must be made in the area immediately after the holding plate for this

bulb to be securely attached to the tube (see Attaching the expansion valve sensing bulb below).

This location must not be less that 2" (50mm) from a “T” connection and made in such a way that

gas flowing from another plate will not effect the temperature it reads. From proper operation it

is imperative that each sensing bulb only responds to the temperature of the gas exiting that

holding plate and not other plates “upstream”.

Attaching the Expansion Valve Sensing Bulb

Carefully uncoil the expansion valve capillary tube and sensing bulb so that it can be secured to

the suction line exiting the plate. Use the perforated metal strap provided or a small hose clamp

to secure the bulb to a horizontal run of the 1/2" suction tubing at the 10:00 or 2:00 position. Do

not use nylon “wire ties” as they do not provide sufficient clamping pressure.

Be sure that the bulb rests flat on the tube to ensure good thermal contact between the bulb and

suction line. When properly attached the bulb should be tight enough to be difficult to twist by

hand. (This is a Prestart Checkout Item)

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12:00 position

2:00 position

12:00 position

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MICRO-AIR Artic Air 24 Guia de Instalação Página 24