19
Fig. 9 — Typical Evaporator Coil Connections (40RU)
Fig. 10 — TXV Sensing Bulb Location
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
refrigerant 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 in
-
stallation. Recommended fittings are listed in Table 11.
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.
FIRST ON/LAST OFF = B
VERTI CAL I NSTALLATI ON
FIRST ON/LAST OF F = A
HORIZONTAL INSTALLATIO N
LEGEND
TXV —
Thermostatic Expansion Valve
NOTE: The 8 o’clock position is shown above.
