Carrier 40RU 25, Manual

Page: 19 / 40

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Chilled Water Piping
See Tables 5 and 6 for chilled water connection sizes. For ease in
brazing, it is recommended that all internal solder joints be made
before unit is placed in final position.
Knockouts are provided in the unit corner posts for 40RUS refrig -
erant piping. Additional field-fabricated access holes are required
for 40RUS chilled water piping. See Fig. 8, 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. 12 for an example of a typical
installation. Recommended fittings are listed in Table 8.
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 infor -
mation on preventing coil freeze-up during winter.
Fig. 12 — Typical 40RUS Chilled Water Piping
Return
Air Return
Air
Subbase Subbase
Gauge
Cocks Gauge
Cocks
Condensate
Trap Condensate
Trap
Disconnect Disconnect
Union Union
Control
Valve Control
Valve
Caps for
Blowout Caps for
Blowout
Return Return
Dirt
Leg Dirt
Leg
Cap Cap
Pump Pump
Supply Line Supply Line