Trane PM014, Инструкция по установке, эксплуатации и обслуживанию

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BAS-SVX33F-EN 9
Pre-Installation
This section provides the following pre-installation information:
• Mounting location
• Transformer considerations
• Recommended configurations
Mounting Location
Important: The power supply module must be mounted onto a DIN rail inside an enclosure that
meets all local electrical codes.
Observe the following:
• The enclosure must allow for the minimum 1.8 in. (4.6 cm) vent clearance around the top and
bottom of the power supply vents.
• The mounting location must meet the temperature and humidity specifications of the power
supply as outlined in Table 3, p. 9 .
• Do not mount the power supply module on a flat surface, such as on a floor or on top of a table.
Mount in an upright position with the front facing outward.
Transformer Considerations
Follow these guidelines when using transformers:
• Transformers must be class 2 rated.
• Non-class 2 transformers must be fused appropriately.
• Fully loaded power supply modules require 75 VA transformers.
The transformer size can be reduced for smaller loads on the power supply module; however,
transformers less than 20 VA should not be used. Table 3 shows the recommended transformer VA
based on the PM014 output current.
Table 3. Transformer recommendations
PM014 output current Less than or equal to 0.7 Adc Greater than 0.7
Transformer VA (minimum) 40 75