Carrier 42BH Series Operation manual

Satisfy All Your Design Requirements
with Carrier’s Versatile 42BH Fan
Coil Unit
• Aselection of 6 sizes covers capaci-
ties from 800 to 4000 cfm
• Choice of motors, from
1
⁄ 4 to 3 hp,
eliminates oversizing
• Wide range of coil options for
2-pipe or 4-pipe system
• Optional DX coils with expansion
valve and distributor
Features/Benefits
The 42BH fan coil unit pro-
vides year-round comfort air
conditioning with central
station operating economy.
A variety of coil options
reduces first cost
Four- or 6-row cooling coils combine
the capacities you need with the
most efficient heat transfer surface.
For 4-pipe systems, select either of
two split-coil options. Coils consist of
alu-minum fins securely bonded to
1
⁄ 2 -in. OD seamless copper tubes.
Each fin’s aluminum collar ensures
accurate control of the fin spacing,
while completely covering the tubes to
lengthen coil life. All coils also fea-
ture manual air vents, with automatic
air vent available as an option.
Fan wheels are designed to
provide low operating costs
The forward-curved, centrifugal,
double-inlet fans are statically and
dynamically balanced at the factory to
minimize transmission of vibration
to the building structure.
The belt-driven motor has a variable-
pitch pulley which adjusts at the job-
site to accommodate limited ranges of
air quantities and pressures.
Product
Data 42BH
System Fan Coil
Air Conditioner
800 to 4000 Cfm
Copyright 1990 Carrier Corporation Form 42BH-1PD

Motors are bolted to an adjustable
platform for easy belt adjustment.
Single-phase motors are resiliently
mounted to reduce noise and
vibration.
Complete factory assembly
minimizes on-the-jobsite costs
and problems
Compact, lightweight units are de-
signed for easy mounting. One-in.
duct flanges on discharge and 2-in.
duct flanges on return are furnished
standard. These integral duct flanges
cut installation time and labor ex-
pense.
Durable construction means
easy-to-maintain units
The 42BH casings are fabricated from
heavy-gage steel, reinforced for
maximum rigidity and structural
strength. Removable side panels allow
easy access for servicing interior
components. One-inch matte surface,
glass fiber thermal/acoustical insula-
tion lines the fan coil cabinets to pre-
vent sweating and to muffle sound
transmission. The condensate pan
extends under full coil surface to cut
maintenance costs. Slide-in return-
duct collar filter makes it possible to
remove and replace the filter with-
out disturbing return air ductwork.
Table of contents
Page
Features/Benefits ...................................................1
Model Number Nomenclature ........................................2
Physical Data ......................................................3
Options and Accessories .............................................3
Dimensions ........................................................4
Selection Procedure ...............................................5,6
Performance Data ............................................... 7-24
Electrical Data ....................................................25
Guide Specifications ...............................................26
Model number nomenclature
2

Physical data
UNIT SIZE 42BH 08 12 16 20 30 40
NOMINAL CFM 800 1200 1600 2000 3000 4000
SHIPPING WT (lb) APPROX 136 165 205 325 413 583
FILTERS
Number...Size (in.) 1...16 x 24 1...16 x 33 2...16 x 21
1
⁄ 2 2...20 x 22 2...27 x 22 2...27 x 29
Face Area (sq ft) 2.6 3.6 4.8 6.1 8.2 10.9
COILS
Size (in.) 15x20 15x29 15x39 18x40 27x40 27x54
Face Area (sq ft) 2.0 3.0 4.0 5.0 7.5 10.0
FANS
Number...Size (in.) 1...9 x 6 1...9 x 9 1...10 x 8 1...12 x 12 1...15 x 15 2...12 x 12
Outlet Area (sq ft) 0.57 0.83 0.81 1.43 2.02 2.86
COPPER COIL CONN. 4 AND 6 ROW (in.)
5
⁄ 8 OD
7
⁄ 8 OD 1
1
⁄ 8 OD 1
1
⁄ 8 OD 1
5
⁄ 8 OD 1
5
⁄ 8 OD
COPPER COIL CONN. 1 AND 2 ROW (in.)
5
⁄ 8 OD
5
⁄ 8 OD
5
⁄ 8 OD
5
⁄ 8 OD
5
⁄ 8OD 5 ⁄ 8 OD
COPPER DRAIN CONN. SIZES (in.)
7
⁄ 8 OD
7
⁄ 8 OD
7
⁄ 8 OD
7
⁄ 8 OD
7
⁄ 8 OD
7
⁄ 8 OD
Options and accessories
Coils — Choice of 2-pipe system with 4-row or 6-row
cooling/heating coil, or 4-pipe system with 4-row or 6-row
cooling and one-row or 2-row heating coil.
Automatic air vents — Optional factory-installed fiber
washers, when dry, allow air in piping to pass through, au-
tomatically bleeding the system and eliminating the need to
manually vent air.
Filters — Factory-installed cleanable filters are available as
anoption in placeof standard throwawayfilters.Both throw-
away and cleanable filters are available as field-installed
accessories.
NOTE: Factory-supplied control packages are not available.
3

Dimensions
NOTES:
1. Side panels removable for access.
2. Certified dimension drawings available on request.
3. All motors larger than 1
1
⁄ 2 hp shipped separately.
4. Unit shown is R.H., L.H. unit is opposite.
5. Motor location varies with unit horsepower. Above
3
⁄ 4 hp, motors are base mounted.
6. Four-row coil shown.
DIMENSION UNIT SIZE 42BH
08 12 16 20 30 40
A35 35 35 38
9
⁄ 16 44
1
⁄ 16 38
9
⁄ 16
B18 18 18 22 29 29
C10
9
⁄ 16 10
9
⁄ 16 11
5
⁄ 8 13
11
⁄ 16 16
1
⁄ 8 13
11
⁄ 16
D16 16 16 20 27 27
E8
1
⁄ 2 12
1
⁄ 16 10
3
⁄ 4 15
7
⁄ 8 18
7
⁄ 8 15
7
⁄ 8
F13
6
⁄ 16 14 18
3
⁄ 16 16
1
⁄ 8 14
5
⁄ 8 13
1
⁄ 2
G28 37 47 48 48 62
H24 33 43 44 44 58
J11
3
⁄ 8 11
3
⁄ 8 11
3
⁄ 8 13
7
⁄ 8 25
1
⁄ 8 25
1
⁄ 8
K41 41 41 44
9
⁄ 16 50
1
⁄ 16 44
9
⁄ 16
4

Selection procedure
Example 1: Selection for specified total
cooling
I Determine job requirements:
Given:
Total Cooling Load ..................67.0 MBtuh
Sensible Cooling Load ...............41.0 MBtuh
Air Delivery ..........................1800 Cfm
Entering Air Temperature ....75.0 F db, 64.5 F wb
Entering Water Temperature.................43F
External Static Pressure...............0.30 in. wg
Maximum Chilled Water Flow Rate......15.0 Gpm
I Select unit based on required air delivery.
From Fan Performance table on page 22, select a unit
that delivers required airflow. Model 42BH size 20 de-
livers 1800 cfm.
I Determine water temperature rise.
This step is used to determine the actual water tem-
perature rise required to provide the specified cooling
capacity.
(This can be done to meet either specified sensible or
specified total capacity. For this example, we will de-
termine water temperature rise required to meet the
specified total capacity after it has been corrected to
the rating curve capacity. The resulting rating curve
sensiblecapacity willbedetermined in StepIV and then
corrected to actual capacity. If the sensible capacity
were the critical requirement, the reverse procedure
would be followed.)
A. Determine the air delivery correction factors using
actual unit air delivery (1800 cfm).
Enter the 42BH Cooling Capacity Correction Fac-
tors table, page 7, at 1800 cfm and find that a
42BH size 20 unit has a total heat (TH) factor of
0.94 and a sensible heat (SH) factor of 0.93.
B. Correct the specified total capacity to the required
rating curve capacity. Specified Total Cap.
Rating Curve Capacity = TH Factor
67.0 MBtuh
=0.94
= 71.3 MBtuh
C. Enter the cooling capacity curve for a size 20 unit
with standard 4-row coil at 71.3 MBtuh and project
vertically to the specified entering wet bulb (65 F).
Project from this point horizontally to the right to
the specified entering water temperature (43 F) and
then vertically to read water temperature rise of 9.2
degrees F.
I Determinetherating curve sensiblecapacityand
the actual sensible capacity..
A. Enter the cooling curve at the intersection of total
capacity (71.3 MBtuh) and entering wet
bulb temperature (65 F). Read horizontally to the
left to the specified dry bulb (75 F). Read down to
the rating curve sensible capacity of 46.0 MBtuh.
B. Correct the rating curve capacity to actual
capacity:
Actual Sensible Cooling
= SH x Rating Curve Sensible Cooling
= 0.93 (From Step III A) x 46.0 MBtuh
= 42.8 MBtuh
I Determine water flow and pressure drop.
A. Actual Total Cooling
Actual Gpm = .5 x Temp Rise
67.0
=.5 x 9.2 (From Step III C)
= 14.6
B. Pressure drop is obtained from the curve on page
18 for the 4-row cooling coil and is 10 ft of
water.
I Find Leaving Air Dry Bulb (LDB) and Leaving
Wet Bulb (LWB) Temperatures.
A. Actual Sensible MBtuh
LDB = EDB − Actual Cfm x .00108
42.8 (Step IV B)
=75 − 1800 x .00108
= 53.0 F
B. Leaving wet bulb is computed by referring to the
Enthalpy at Saturation table on page 21. First de-
termine that the enthalpy at saturation for the en-
tering (h ) wet bulb of 64.5 is 29.69 Btu per lb
ent
of dry air. Actual Total Capacity
h=h−
lvg ent .00445 x Actual Cfm
67.0
= 29.69 −
.00445 x 1800
= 21.33
Again referring to the table, the temperature cor-
responding to 21.33, by interpolation, is 51.8 F,
which is the leaving wet bulb.
I Verify that the selected unit will provide the re-
quired external static pressure of 0.30 in. wg
with the selected coil, options, and ductwork.
A. Determine total static pressure. For an application
with ductwork, the total static pressure is equal to
the sum of the external static pressure, duct grilles,
and component static pressures.
Assume for this example that the selected 42BH
size 20 unit with 4-row cooling coil has a double
deflection grille and throwaway filter. Enter the
42BHComponent Static Resistancetable(page 21)
at unit size 20, 1800 cfm, and find the static resis-
tance (in. wg) for the following components:
Cabinet 0.12
4-Row Coil 0.37
Throwaway Filter 0.12
Double Deflection Grille + 0.07
0.68
5

Selection procedure (cont)
Component Static Resistance 0.68
External Static Pressure + 0.30
Total Static Pressure 0.98
B. Refer to the Fan Performance table on page 22
anddetermine that asize20 unitwilldeliver 1800
cfm at 1.0 total static pressure with a
3
⁄ 4 hp mo-
tor and mid-range fan rpm of 840.
NOTE: The rpm’s shown in the Fan Performance
tablearefor reference only. Theappropriatedrives
will be selected at the factory based on specified
cfm and total static pressure.
Example 2 — Determining unit capacity for
specified water flow (gpm)
I Determine job requirements.
Given:
Maximum Chilled Water Flow Rate......15.0 Gpm
Entering Water Temperature.................42F
Air Delivery ..........................1800 Cfm
Entering Air Temperature........70Fdb,65Fwb
External Static Pressure...............0.30 in. wg
I Make initial selection of unit based on required
air delivery.
From Fan Performance table on page 22, select a unit
that delivers required airflow. Model 42BH size 20 de-
livers 1800 cfm.
I Determine the air delivery correction factors us-
ing actual unit air delivery.
Enter the 42BH Cooling Capacity Correction Factors
table (page 7) at 1800 cfm and find that a 42BH size
20 unit has a total heat (TH) factor of 0.94 and a sen-
sible heat (SH) factor of 0.93.
I Determine water temperature rise.
Arbitrarily select a total cooling capacity and apply
the correction factor to obtain a beginning rating curve
capacity. Selected Total Capacity
Rating Curve Capacity = TH Factor
64.0 MBtuh
=0.94
= 68.0 MBtuh
Enter the cooling capacity curve for a size 20 unit with
standard 4-row coil at 68.0 MBtuh and project verti-
cally to the specified entering wet bulb (65 F). Project
from this point horizontally to the right to the speci-
fied entering water temperature (42 F) and then verti-
cally to read water temperature rise of 11.0 degrees F.
I Calculate actual water flow for the selected to-
tal capacity by using the following formula:
Actual Total Cooling
Actual Gpm = 0.5 Temp Rise
64.0
=0.5 x 11.0 (From Step IV)
= 11.6
Since 11.6 is less than the specified gpm, another
highertotal coolingcapacitymust be selectedand Steps
IVandV repeated until theresultingactualgpmmatches
the specified gpm.
I Determineratingcurve sensible capacityandthe
actual sensible capacity.
Once the specified gpm is matched and the total cool-
ing capacity is known, the actual sensible capacity may
be determined using Step IV of Example 1. The water
pressure drop may be read from the water pressure
drop curve.
Example 3: Heating selection
I Determinejobrequirements.(Unitpreviouslyse-
lected for cooling.)
Given:
Heating Load .......................54.0 MBtuh
Entering Water Temperature ...............110F
Entering Air Temperature ................70Fdb
Hot Water Flow Rate (same as cooling)... 14.6 gpm
I Determine actual heating capacity.
Enter Heating Capacity curve (page 23) for 42BH size
20 unit with a 4-row coil at 14.6 gpm and find 168.0
MBtuh rated heating capacity.
Refer to Correction Factors tables on pages 7 and 8.
Actual Heating Capacity = Rated Capacity
x SH Factor (from
Cooling Capacity
Correction Factors)
x Hot Water Capacity
Correction Factor
= 168.0 x 0.93 x 0.363
= 56.7
This slightly exceeds required heating capacity of 54.0
MBtuh.
IMPORTANT: Check to ensure leaving air tempera-
ture does not exceed 104 F.
MBtuh x 1000
Leaving = + Entering
Air Temp Air Temp
1.08 x cfm
56.7 x 1000
=+70
1.08 x 1800
=99F.
Leaving air temperature is within the limit. (Consult
factory for special motors if the temperature exceeds
the limit.)
6

Performance data
42BH COOLING CAPACITY CORRECTION FACTORS
ACTUAL
CFM
UNIT SIZE 42BH
08 12 16 20 30 40
TH SH TH SH TH SH TH SH TH SH TH SH
600 0.86 0.82 ——————————
700 0.94 0.91 ——————————
800 1.00 1.00 ——————————
900 1.06 1.09 0.88 0.82 ————————
1000 1.12 1.18 0.92 0.88 ————————
1100 — — 0.96 0.94 ————————
1200 — — 1.00 1.00 0.88 0.84 ——————
1300 — — 1.04 1.06 0.91 0.88 ——————
1400 — — 1.06 1.10 0.94 0.92 ——————
1500 ————0.97 0.96 ——————
1600 ————1.00 1.00 0.89 0.85 ————
1700 ————1.03 1.03 0.92 0.90 ————
1800 ————1.06 1.08 0.94 0.93 ————
1900 ————1.09 1.12 0.97 0.96 ————
2000 ————1.12 1.16 1.00 1.00 ————
2100 ——————1.02 1.04 ————
2200 ——————1.06 1.07 ————
2400 ——————1.09 1.11 0.89 0.85 — —
2600 ——————1.12 1.14 0.92 0.90 — —
2800 ————————0.96 0.95 — —
3000 ————————1.00 1.00 — —
3200 ————————1.04 1.05 — —
3400 ————————1.08 1.10 0.92 0.89
3600 ——————————0.94 0.93
3800 ——————————0.97 0.96
4000 ——————————1.00 1.00
4200 ——————————1.02 1.04
SH—Sensible Heat TH—Total Heat
NOTE: Use Sensible Heat correction factors when calculating heating capacity.
7

Performance data (cont)
ALTITUDE COOLING CORRECTION FACTORS
ELEVATION TOTAL HEAT SENSIBLE HEAT
1000 0.99 0.96
2000 0.98 0.93
3000 0.97 0.89
4000 0.96 0.86
5000 0.94 0.83
6000 0.93 0.80
DIRECT EXPANSION (DX) CORRECTION FACTORS
%OF
NOMINAL CFM CORRECTION FACTOR
Total Sensible
80 0.95 0.93
90 0.97 0.96
100 1.00 1.00
110 1.02 1.04
120 1.05 1.08
Consult factory for values outside of table.
DX Total Capacity (MBtuh) = Base TH x Total Correction Factor
DX Sensible Capacity (MBtuh) = Base SH x Sensible Correction
Factor
% of Nominal Cfm = Actual Cfm (from Fan Performance table)
÷ Nominal Cfm
42BH HOT WATER CAPACITY CORRECTION FACTORS
ENTERING AIR
TEMPERATURE (F) ENTERING WATER TEMPERATURE (F)
100 110 120 130 140 150 160 170 180 190 200
50 0.455 0.545 0.636 0.727 0.818 0.909 1.000 1.091 1.182 1.273 1.364
55 0.409 0.500 0.591 0.682 0.773 0.864 0.955 1.045 1.136 1.227 1.318
60 0.363 0.455 0.545 0.636 0.727 0.818 0.909 1.000 1.091 1.182 1.273
65 0.318 0.409 0.500 0.591 0.682 0.773 0.864 0.955 1.045 1.136 1.227
70 0.272 0.363 0.455 0.545 0.636 0.727 0.818 0.909 1.000 1.091 1.182
75 0.227 0.318 0.409 0.500 0.591 0.682 0.773 0.864 0.955 1.045 1.136
80 0.182 0.272 0.363 0.455 0.545 0.636 0.727 0.818 0.909 1.000 1.091
NOTES:
1. Leaving air temperature not to exceed 104 F with standard motor.
2. Base capacity ratings based on 180 F entering water temperature
and 70 F entering air temperature.
NOTE: Hot Water Heating Capacity (MBtuh) = Rated Heating Capacity
x Hot Water Capacity Correction Factor x SH (SH value found in Cool-
ing Capacity Correction Factors table on page 7).
8

42BH NOMINAL COOLING CAPACITIES
UNIT SIZE
42BH NOMINAL CFM COIL ROWS EWT GPM COOLING*
Total Capacity Sensible Capacity
(MBtuh) (MBtuh)
08 800 440 6.6 33.0 21.2
45 4.9 24.4 17.7
50 3.0 15.0 14.6
640 7.8 39.0 24.7 45 6.0 30.0 21.4
50 4.2 21.0 18.5
12 1200 440 10.4 52.0 31.0
45 7.9 39.5 26.0
50 5.2 26.0 22.0
640 12.6 63.0 37.5 45 9.8 49.0 32.5
50 7.0 35.0 27.0
16 1600 440 14.2 71.0 44.5
45 10.2 51.0 38.0
50 6.2 31.0 31.0
640 16.2 81.0 50.0 45 11.9 59.5 42.0
50 7.5 37.5 33.0
20 2000 440 18.8 94.0 58.0
45 13.4 67.0 48.0
50 8.6 43.0 39.0
640 21.0 105.0 63.5 45 16.0 80.0 52.2
50 11.0 55.0 42.0
30 3000 440 25.6 128.0 83.0
45 18.4 92.0 70.5
50 13.9 69.5 56.7
640 32.9 164.5 98.0 45 25.6 128.5 84.0
50 18.5 92.5 68.0
40 4000 440 36.4 182.0 116.5
45 28.0 140.0 100.0
50 19.2 96.0 80.0
640 44.4 222.0 134.0 45 34.9 174.5 112.5
50 25.6 128.0 92.5
EWT — Entering Water Temperature
*Based on entering air temperature of 67 F wb, 80 F db and temperature rise of 10 degrees F.
NOTES:
1. All ratings at sea level.
2. Ratings in accordance with ARI.
9

Performance data (cont)
COOLING CAPACITY 42BH08
4-ROW — 800 CFM
6-ROW — 800 CFM
10

COOLING CAPACITY 42BH12
4-ROW — 1200 CFM
6-ROW — 1200 CFM
11

Performance data (cont)
COOLING CAPACITY 42BH16
4-ROW — 1600 CFM
6-ROW — 1600 CFM
12

COOLING CAPACITY 42BH20
4-ROW — 2000 CFM
6-ROW — 2000 CFM
NOTE: Arrows illustrate Step III and IV of Selection Procedure Example 1.
13

Performance data (cont)
COOLING CAPACITY 42BH30
4-ROW — 3000 CFM
6-ROW — 3000 CFM
14

COOLING CAPACITY 42BH40
4-ROW — 4000 CFM
6-ROW — 4000 CFM
15

Performance data (cont)
DIRECT EXPANSION (DX) BASE COOLING CAPACITIES* (MBtuh)
4-ROW COIL
UNIT
SIZE
42BH
CONNECTION
SIZE (in.) CFM R-22
SUCTION
TEMP
ENTERING AIR TEMPERATURE (F) — db/wb
75/63 80/63 75/67 80/67 80/71 85/71
Liquid Suction TH SH TH SH TH SH TH SH TH SH TH SH
08
3
⁄ 85 ⁄ 8
600 40 17.1 13.0 17.8 16.1 21.8 12.0 22.1 15.0 27.0 13.8 27.2 16.9 45 12.7 11.0 14.2 14.1 17.1 10.0 17.4 13.0 22.4 12.0 22.6 15.0
50 8.5 8.5 11.1 11.1 11.9 7.9 12.6 11.0 17.2 10.0 17.5 13.1
800 40 20.0 15.9 21.0 19.9 25.2 14.3 25.5 18.2 30.9 16.4 31.2 20.3 45 15.0 13.6 16.8 16.8 19.9 12.1 20.2 16.0 25.8 14.4 26.1 18.3
50 10.5 10.5 13.7 13.7 13.8 9.8 15.0 13.7 19.8 12.2 20.3 16.1
900 40 21.1 17.2 22.4 21.5 26.6 15.4 26.9 19.6 32.5 17.6 32.8 21.8 45 16.0 14.8 18.2 18.2 21.0 13.1 21.4 17.4 27.2 15.5 27.5 19.8
50 11.4 11.4 14.9 14.9 14.6 10.6 16.0 15.0 21.0 13.2 21.5 17.5
12
1
⁄ 27 ⁄ 8
1000 40 29.2 21.9 30.0 27.0 37.4 20.4 37.8 25.4 46.6 23.8 47.0 28.8 45 21.3 18.3 23.8 23.4 29.0 16.8 29.5 21.8 38.2 20.3 38.7 25.3
50 14.2 14.2 18.5 18.5 20.1 13.2 21.1 18.4 29.1 16.8 29.6 21.8
1200 40 32.5 25.0 33.6 30.9 41.5 23.0 41.9 28.8 51.6 26.7 52.0 32.5 45 23.8 21.0 26.2 26.2 32.2 19.1 32.7 25.0 42.3 23.0 42.8 28.8
50 16.3 16.3 21.3 21.3 22.2 15.2 23.6 21.2 32.2 19.1 32.7 25.0
1300 40 33.9 26.4 35.3 32.7 43.3 24.2 43.8 30.4 53.7 28.1 54.2 34.3 45 24.9 22.3 27.7 27.7 33.6 20.2 34.2 26.4 44.1 24.2 44.6 30.4
50 17.3 17.3 22.5 22.5 23.2 16.1 24.8 22.4 33.6 20.2 34.1 26.5
16
5
⁄ 87 ⁄ 8
1400 40 38.6 29.7 40.2 36.8 49.7 27.5 50.2 34.4 62.0 32.0 62.6 39.0 45 28.2 24.9 31.0 31.0 38.3 22.7 38.9 29.7 50.6 27.4 51.2 34.4
50 19.2 19.2 25.1 25.1 26.0 17.9 28.0 25.1 38.2 22.7 38.9 29.7
1600 40 41.7 32.7 43.6 40.6 53.4 30.0 54.0 37.8 66.5 34.8 67.2 42.6 45 30.5 27.6 34.2 34.2 41.2 24.9 41.8 32.7 54.4 30.0 55.0 37.7
50 21.1 21.1 27.7 27.7 28.0 19.8 30.3 27.7 41.0 24.9 41.8 32.8
1800 40 44.4 35.4 46.7 44.1 56.8 32.3 57.5 40.9 70.6 37.4 71.3 45.9 45 32.7 30.0 37.1 37.1 43.8 26.9 44.5 35.5 57.7 32.3 58.4 40.9
50 23.0 23.0 30.1 30.1 29.7 21.5 32.5 30.2 43.6 27.0 44.5 35.7
20
5
⁄ 87 ⁄ 8
1800 40 47.8 37.3 49.9 46.3 61.0 34.1 61.7 43.0 75.6 39.5 76.3 48.3 45 35.2 31.5 39.1 39.1 47.4 28.5 48.2 37.3 62.3 34.2 63.0 43.0
50 24.3 24.3 31.8 31.8 32.6 22.7 35.1 31.7 47.4 28.6 48.2 37.5
2000 40 50.6 40.1 53.1 49.9 64.4 36.5 65.1 46.1 79.6 42.1 80.3 51.7 45 37.5 34.1 42.1 42.1 50.1 30.6 50.9 40.2 65.7 36.5 66.4 46.2
50 26.3 26.3 34.3 34.3 34.4 24.5 37.3 34.3 50.1 30.7 51.0 40.4
2200 40 53.1 42.8 56.0 53.3 67.5 38.7 68.2 49.1 83.2 44.5 84.0 54.9 45 39.6 36.5 45.0 45.0 52.5 32.5 53.4 43.0 68.7 38.8 69.5 49.2
50 28.1 28.1 36.6 36.6 36.1 26.2 39.4 36.7 52.4 32.7 53.6 43.2
30
5
⁄ 8 1
1
⁄ 8
2600 40 80.2 59.7 81.7 72.7 100.6 55.4 101.7 68.4 123.3 63.5 124.2 76.5 45 60.4 50.7 65.5 64.0 80.5 46.7 81.6 59.7 103.4 55.4 104.5 68.3
50 42.7 41.8 51.9 51.9 58.3 37.8 60.2 50.9 81.4 46.8 82.4 59.8
2800 40 83.7 62.9 85.4 76.7 104.7 58.1 105.9 71.8 128.2 66.5 129.2 80.2 45 63.1 53.6 68.8 67.5 83.9 49.1 85.0 62.9 107.7 58.1 108.7 71.9
50 44.9 44.2 54.8 54.8 60.7 39.9 62.9 53.8 84.7 49.2 85.8 63.0
3000 40 86.9 65.9 88.8 80.5 108.7 60.6 109.8 75.2 132.8 69.3 133.8 83.8 45 65.6 56.3 71.9 71.0 87.0 51.4 88.2 66.0 111.6 60.7 112.7 75.3
50 47.0 46.5 57.6 57.6 63.0 41.9 65.4 56.6 87.8 51.6 89.0 66.2
3200 40 89.9 68.8 92.0 84.2 112.4 63.0 113.5 78.4 136.8 72.0 138.1 87.3 45 68.0 59.0 74.9 74.3 90.0 53.6 91.2 69.0 115.3 63.2 116.4 78.5
50 49.0 48.7 60.3 60.3 65.2 43.8 67.8 59.3 90.8 53.8 92.0 69.2
40
7
⁄ 8 1
1
⁄ 8
3600 40 108.8 81.9 111.1 99.8 136.0 75.6 137.4 93.5 116.2 86.4 167.3 104.2 45 82.3 70.0 89.7 88.1 109.3 64.2 110.6 82.0 139.9 75.7 141.2 93.5
50 58.8 57.9 71.6 71.6 79.4 52.2 82.2 70.3 110.4 64.3 111.8 82.2
3800 40 112.1 85.0 114.5 103.7 140.1 78.2 141.3 96.8 170.7 89.2 172.1 107.8 45 84.9 72.8 92.6 91.6 112.5 66.5 113.9 85.2 143.9 78.3 145.2 97.0
50 60.9 60.2 74.4 74.4 81.7 54.2 84.7 73.1 113.6 66.7 115.0 85.4
4000 40 115.2 88.0 117.8 107.5 143.8 80.7 145.1 100.1 174.8 92.0 176.3 111.4 45 87.4 75.5 96.0 95.0 115.5 68.7 117.0 88.2 147.6 80.9 149.0 100.3
50 63.0 62.5 77.2 77.2 83.9 56.2 87.2 75.9 116.6 69.0 118.1 88.5
4200 40 118.2 90.9 121.0 111.2 147.3 83.0 148.7 103.3 178.9 94.6 180.4 114.8 45 89.8 78.1 99.0 98.3 118.4 70.9 119.9 91.2 151.2 83.3 152.7 103.6
50 65.0 64.7 79.9 79.9 86.1 58.1 89.5 78.6 119.5 71.2 121.1 91.5
SH—Sensible Heat TH—Total Heat
*Capacity based on R-22 refrigerant at 105 F liquid temperature and 10 degrees F superheat.
16

DIRECT EXPANSION (DX) BASE COOLING CAPACITIES* (MBtuh) (cont)
6-ROW COIL
UNIT
SIZE
42BH
CONNECTION
SIZE (in.) CFM R-22
SUCTION
TEMP
ENTERING AIR TEMPERATURE (F) — db/wb
75/63 80/63 75/67 80/67 80/71 85/71
Liquid Suction TH SH TH SH TH SH TH SH TH SH TH SH
08
1
⁄ 25 ⁄ 8
600 40 21.3 15.4 21.8 18.8 26.6 14.3 26.8 17.6 32.3 16.3 32.4 19.6 45 16.3 13.2 17.5 16.7 21.6 12.2 21.8 15.5 27.5 14.4 27.7 17.7
50 11.4 10.9 13.5 13.5 15.8 9.8 16.4 13.2 22.0 12.2 22.2 15.5
800 40 25.0 19.1 25.8 23.5 30.9 17.2 31.0 21.5 37.0 19.5 37.2 23.7 45 19.4 16.5 21.3 21.0 25.2 14.9 25.6 19.2 31.9 17.4 32.1 21.7
50 14.1 13.8 17.0 17.0 18.5 12.2 19.5 16.7 25.7 15.0 26.1 19.4
900 40 26.5 20.7 27.6 25.6 32.5 18.5 32.7 23.3 38.9 20.8 39.1 25.6 45 20.8 18.1 23.1 22.9 26.7 16.1 27.1 20.9 33.7 18.7 33.9 23.5
50 15.3 15.2 18.5 18.5 19.7 13.3 20.9 18.3 27.1 16.3 27.6 21.1
12
1
⁄ 27 ⁄ 8
1000 40 39.0 27.4 39.4 32.9 48.6 25.9 48.9 31.4 59.0 29.6 59.3 35.1 45 30.0 23.3 31.4 29.0 39.7 21.9 40.0 27.4 50.4 25.9 50.7 31.4
50 21.1 19.2 23.8 23.8 29.7 17.7 30.3 23.3 40.6 21.9 41.0 27.4
1200 40 43.7 31.5 44.3 38.0 54.1 29.4 54.6 35.8 65.6 33.4 65.9 39.8 45 33.8 26.9 35.7 33.7 44.4 25.1 44.9 31.5 56.0 29.5 56.6 35.9
50 24.0 22.4 27.7 27.7 33.1 20.5 34.0 27.0 45.3 25.1 45.8 31.6
1300 40 45.9 33.4 46.5 40.4 56.6 31.0 57.1 37.9 68.4 35.1 68.7 42.0 45 35.5 28.7 37.6 35.9 46.5 26.5 47.0 33.5 58.6 31.1 59.2 38.0
50 25.4 24.0 29.6 29.6 34.9 21.8 35.7 28.8 47.4 26.6 47.9 33.5
16
5
⁄ 87 ⁄ 8
1400 40 52.8 37.6 53.5 45.3 65.9 35.4 66.3 43.1 80.1 40.5 80.5 48.1 45 40.5 32.0 42.7 40.0 53.6 30.0 54.1 37.6 68.1 35.4 68.7 43.1
50 28.5 26.5 32.7 32.7 39.7 24.3 40.7 32.0 54.6 39.0 55.2 37.6
1600 40 57.3 41.6 58.3 50.3 71.1 38.8 71.7 47.4 86.3 44.1 86.8 52.7 45 44.1 35.6 46.9 44.6 58.1 33.0 58.7 41.7 73.6 38.9 74.2 47.5
50 31.3 29.6 36.5 36.5 43.1 26.9 44.3 35.7 59.2 33.1 59.7 41.7
1800 40 61.4 45.3 62.6 55.0 75.9 41.9 76.6 51.4 91.8 47.5 92.3 57.0 45 47.4 39.0 50.8 49.0 62.1 35.9 62.7 45.5 78.4 42.0 79.2 51.6
50 34.0 32.6 40.1 40.1 46.2 29.4 47.6 39.2 63.2 36.0 63.8 45.6
20
5
⁄ 87 ⁄ 8
1800 40 64.7 46.9 65.7 56.8 80.0 43.6 80.6 53.3 96.6 49.4 97.0 59.1 45 50.2 40.3 53.1 50.5 65.8 37.3 66.4 47.1 82.9 43.7 83.6 53.4
50 35.7 33.6 41.5 41.5 49.3 30.6 50.5 40.5 67.2 37.4 67.8 47.2
2000 40 68.7 50.6 70.0 61.5 84.6 46.6 85.3 57.3 101.9 52.7 102.4 63.3 45 53.5 43.7 57.1 54.9 69.8 40.2 70.4 50.9 87.7 46.9 88.4 57.5
50 38.5 36.7 45.1 45.1 52.4 33.1 53.8 44.0 71.2 40.4 71.9 51.1
2200 40 72.3 54.2 74.0 66.0 89.0 49.4 89.6 61.1 106.7 55.7 107.2 67.3 45 56.5 47.0 60.8 59.1 73.4 42.8 74.1 54.5 92.1 49.8 92.8 61.4
50 41.1 36.9 48.5 48.5 55.2 35.5 56.9 47.4 74.8 43.1 75.6 54.8
30
5
⁄ 8 1
1
⁄ 8
2600 40 101.1 71.9 102.4 86.2 126.1 68.1 126.9 82.3 153.4 77.9 154.2 92.1 45 77.7 61.1 81.6 76.0 102.7 57.7 103.6 71.9 130.6 68.0 131.4 82.2
50 54.7 50.6 62.5 62.5 76.3 46.8 78.1 61.2 104.7 57.6 105.7 71.8
2800 40 106.0 76.1 107.4 91.4 132.0 71.7 132.9 86.9 160.3 81.8 161.1 97.0 45 81.6 64.9 86.0 80.8 107.5 60.9 108.5 76.1 136.2 71.7 137.5 86.8
50 57.7 53.9 66.4 66.4 80.0 49.5 81.9 65.0 109.5 60.8 110.6 76.0
3000 40 110.6 80.1 112.2 96.4 137.2 75.1 138.4 91.2 166.7 85.5 167.6 101.6 45 85.2 68.5 90.2 85.4 112.1 63.9 113.2 80.1 141.8 75.2 143.2 91.3
50 60.5 57.0 70.1 70.1 83.4 52.2 85.5 68.6 114.1 64.0 115.2 80.2
3200 40 115.0 83.9 116.8 101.3 142.4 78.4 143.7 95.5 172.7 89.0 173.7 106.1 45 88.7 72.0 94.2 89.9 116.4 66.9 117.6 84.0 147.1 78.5 148.5 95.6
50 63.3 60.1 73.8 73.8 86.6 54.7 89.0 72.2 118.4 67.0 119.6 84.1
40
7
⁄ 8 1
1
⁄ 8
3600 40 136.5 98.3 138.2 118.0 168.6 92.0 169.6 111.5 203.1 104.1 203.9 123.6 45 106.5 84.5 111.8 104.9 139.0 78.9 140.2 98.5 174.5 92.3 176.0 111.7
50 76.2 70.7 86.8 86.8 105.0 64.9 107.3 84.8 142.1 79.1 143.3 98.7
3800 40 141.0 102.2 142.8 123.0 173.5 95.3 174.9 115.8 209.0 107.7 210.0 128.2 45 110.1 88.1 115.9 109.5 143.5 82.0 144.7 102.5 179.8 95.6 181.4 116.1
50 79.0 73.9 90.7 90.7 108.4 67.6 110.9 88.4 146.6 82.2 147.9 102.8
4000 40 145.2 106.1 147.3 127.8 178.5 98.5 179.9 119.9 214.7 111.1 215.7 132.5 45 113.6 91.6 119.9 114.1 147.7 84.9 149.0 106.4 184.9 98.9 186.5 120.3
50 81.8 77.0 94.4 94.4 111.7 70.2 114.4 92.0 150.8 85.2 152.2 106.8
4200 40 149.2 109.8 151.7 132.6 183.2 101.6 184.6 123.9 220.0 114.3 221.0 136.8 45 116.9 95.1 123.8 118.5 151.8 87.7 153.1 110.3 189.7 102.0 191.4 124.4
50 84.5 80.1 98.1 98.1 114.9 72.7 117.7 95.6 154.9 88.1 156.3 110.7
SH—Sensible Heat TH—Total Heat
*Capacity based on R-22 refrigerant at 105 F liquid temperature and 10 degrees F superheat.
17

Performance data (cont)
42BH WATER PRESSURE DROP
18

42BH WATER PRESSURE DROP (cont)
19

Performance data (cont)
42BH WATER PRESSURE DROP (cont)
20