Carrier R-410A manual

Chillled Water Piping — See Tables 1C and 1D for chilled water connecton sizes. For ease in bazing, it it recom- mended that all internal solder joints be made before unit is placed in final position.

Knockouts are provided in the unit corner posts for 40RUS re- frigerant piping. Additional field-fabricated access holes are re- quired for 40RUS chilled water piping. See Fig. 7, which lists recommended knockouts and access holes to use for each 40RUS unit size.

To size, design, and install chilled water piping, consult the Carrier System Design manual. See Fig. 11 for an example of a typical installation. Recommended fittings are listed in Table 3.

To access 40RUS coil vents and drains, remove the unit side panel over the coil header. Vent and drain plugs are on the top and bottom of header, respectively. See the Service section for information on preventing coil freeze-up during winter.

Fig. 11 — Typical 40RUS Chilled Water Piping

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