12
Fig. 8 — Typical Evaporator Coil Connections (40RF)
Fig. 9 — TXV Sensing Bulb Location
Chilled Water Piping
See Table 3 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 40RFS
refrigerant piping. Additional field-fabricated access holes are
required for 40RFS chilled water piping. See Fig. 6, which lists
recommended knockouts and access holes to use for each 40RFS
unit size.
To size, design, and install chilled water piping, consult the Carrier
System Design manual. See Fig. 10 for an example of a typical in-
stallation. Recommended fittings are listed in Table 8.
To access 40RFS 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. 10 — Typical 40RFS Chilled Water Piping
First On/Last Off = B
Vertical Installation
First On/Last Off = A
Horizontal Installation
AA
BB
Liquid Line
Connection
Liquid Line
Connection
Suction-Vapor
Connection
Suction-Vapor
Connection
Condensate
Drain
Connection
Condensate
Drain
Connection
AA
BB
Condensate Drain Connection
LEGEND
TXV — Thermostatic Expansion Valve
NOTE: The 8 o’clock position is shown above.
Vapor Line Vapor Line
45° 45°
Strap Strap
TVX Bulb TVX Bulb
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
CapCap
Pump Pump
Supply Line Supply Line
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