4
Step 6 — Make Piping Connections (See
Table 1 and Fig. 2 and 3)
DRAIN — The unit has a double-sloped condensate drain pan
to ensure proper drainage. The condensate drain must be at
least
3
/
4
-in. copper, galvanized, black iron, or PVC piping. In-
stall the trapped drain line in accordance with all applicable
codes. Slope drain away from unit to prevent overflowing and
insulate the line to prevent sweating.
Drain piping should be sloped a minimum of
1
/
8
-in. per ft
away from the unit. Condensate drain must be trapped for
proper drainage and odor control. The differential height of the
trap inlet to outlet must be at least 1-in. wg greater than the total
static pressure of the unit. The differential height of the outlet to
the bottom of the trap must not be less than the total static pres-
sure of the unit.
The 42BVE units should be installed on a pad. The height
of the pad should be adequate to allow for a proper condensate
trap. The condensate trap shown in Fig. 4 is for a unit with a
total static pressure (TSP) of 2-in. wg with a 1-in. wg safety
factor for any change in operating conditions. The A dimension
must equal the system TSP plus 1-in. wg. The B dimension is
one half of A, and C is the total of A + B + pipe diameter.
The unit drain pan is equipped with a secondary connection
that must be piped to an open-site drain. This will prevent over-
flow and possible building damage if the primary drain is
blocked. The secondary drain connection can be capped if po-
tential overflow will not damage the building or unit.
WATER SUPPLY/RETURN CONNECTIONS — Install pip-
ing in accordance with all applicable codes. The supply and
return connections are marked on the coil stub ends with an “S”
on the supply (inlet) and an “R” on the return (outlet). Blue
letters mark chilled water connections, red letters indicate
steam or hot water connections. Install valves in lines in
accordance with valve manufacturer’s instructions. Be sure
valves are in proper operating position and are easily accessible
for adjustment.
HYDROSTATIC TEST — When all joints are completed,
perform hydrostatic test for leaks. Hydronic systems should be
tested with water (some components are not designed to hold
gas). If gas testing is necessary, pressure must NOT exceed
80 psig. All chilled water piping and valves not located over
drain pans or drip lips must be insulated to prevent damage
from sweating. Vent all coils during final preparations. (See
Step 10, section 6.)
Check interior unit piping for signs of leakage from ship-
ping damage or mishandling. If leaks are found, notify your lo-
cal Carrier representative before initiating any repairs.
INSULATION — Following the hydrostatic test, insulate all
piping to unit to prevent sweating.
Table 1 — Unit Physical Data
WARNING
Never pressurize unit beyond the specified test pressure.
Always pressure test with an inert gas or fluid (nitrogen or
clear water) to avoid possible unit damage or personal
injury in the event of a leak during testing.
CAUTION
All water coils must be protected from freezing after initial
filling with water. Even if system is drained, unit coils may
still hold enough water to cause damage when exposed to
temperatures below freezing.
UNIT SIZE 42BHE, BVE 06 08 10 12 16 20 30 40
NOMINAL CFM 600 800 1000 1200 1600 2000 3000 4000
42BHE OPERATING WT (lb)
(no heat/ with heat)
203/234 205/236 253/287 256/290 312/346 344/380 437/474 553/590
42BVE OPERATING WT (lb)
(no heat/ with heat)
200/231 202/233 243/277 247/281 289/323 351/387 436/473 522/559
FILTERS (2 in. pleated)
Number...Size (in.) 1...16
1
/
2
x 24 1...16
1
/
2
x 24 1...18
1
/
4
x 33 1...18
1
/
4
x 33 2...18
1
/
4
x 21
1
/
2
2...20
3
/
4
x 22 2...29 x 22 2...29 x 29
Face Area (sq ft) 2.8 2.8 4.2 4.2 5.5 6.3 8.9 11.7
HYDRONIC COILS
Size (in.) 15 x 20 15 x 20 15 x 29 15 x 29 15 x 39 18 x 40 27 x 40 27 x 54
Face Area (sq ft) 2.1 2.1 3.0 3.0 4.1 4.9 7.7 10.3
Fins per inch
10
Coil Water Volume (approx. gal.
per row of coil)
0.240 0.240 0.324 0.324 0.420 0.492 0.768 1.020
FANS
Qty...Size (in.) 1...9 x 4 1...9 x 6 1...10 x 4 1...10 x 7 1...11 x 10 1...12 x 9 1...12 x 12 1...15 x 12
HYDRONIC COIL CONN. (in.)
8 ROW (Cooling) 1 nominal, 1.125 OD 1
1
/
2
nominal, 1.625 OD
4 AND 6 ROW (Cooling)
3
/
4
nominal, 0.875 OD 1 nominal, 1.125 OD 1
1
/
2
nominal, 1.625 OD
1 ROW (Heating)
1
/
2
nominal, 0.625 OD 1
1
/
2
nominal, 1.625 OD
2 ROW (Heating)
1
/
2
nominal, 0.625 OD 1 nominal, 1.125 OD 1
1
/
2
nominal, 1.625 OD
DX COIL CONN. LIQUID LINE (in.)
1
/
4
nominal, 0.375 OD
1
/
2
nominal, 0.625 OD
DX COIL CONN. SUCTION LINE (in.)
3
/
4
nominal, 0.875 OD 1 nominal, 1.125 OD 1
1
/
2
nominal, 1.625 OD
DRAIN CONN. SIZES (in.)
3
/
4
MPT
42BHE/BVE
UNIT
CASING
3.0
1.5
CLEAN-OUT
ALLOW A MINIMUM OF
“C” INCHES FROM BOTTOM
OF UNIT TO FINISHED FLOOR
(42BVE UNIT) OR TO FALSE
CEILING (42BHE UNIT).
C
B
A
Fig. 4 — Condensate Trap
NOTE: Dimension C is the total of A + B + the pipe diameter.
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