3
Table 1 — 42WKN Physical Data
LEGEND
NOTES:
1. Nominal cooling capacity based on 80°F dry bulb / 67°F wet bulb
indoor and a 45°F entering/ 55°F leaving chilled water tempera-
ture, 208-v/1Ph/60Hz supply voltage, and standard filters.
2. Nominal heating capacity based on water temperature of 180°F
inlet /160°F outlet and an air temperature of 70°F dry bulb/60°F
wet bulb, 208-v/1Ph/60Hz supply voltage, and standard filters.
3. Ducted air volume based on maximum air volume available
through one branch duct 6 ft long, with cassette fan(s) at high
speed and corresponding fascia aperture closed.
4. Fresh air volume based on maximum fresh air through all knock-
outs connected to one 10 ft long duct with fan at high speed.
42WKN UNIT SIZE
08
12
18
20
33
36
Nominal TONS
3
/
4
1
1
1
/
2
1
3
/
4
2
1
/
2
3
COOLING CAPACITY (Btuh)
7,800
11,200
18,200
18,600
31,100
34,300
Dimensions/Weights
Height – Chassis/Fascia (in.)
(not additive)
11
3
/
4
/ 1
1
/
4
11
3
/
4
/ 1
1
/
4
11 / 1
3
/
4
11 / 1
3
/
4
13 / 1
3
/
4
13 / 1
3
/
4
Width – Chassis/Fascia (in.)
22
1
/
2
/ 25
22
1
/
2
/ 25
32
3
/
8
/ 37
32
3
/
8
/ 37
45
1
/
2
/ 49
1
/
4
45
1
/
2
/ 49
1
/
4
Depth – Chassis/Fascia (in.)
22
1
/
2
/ 25
22
1
/
2
/ 25
32
3
/
8
/ 37
32
3
/
8
/ 37
32
3
/
8
/ 37
32
3
/
8
/ 37
Weight – Chassis/Fascia (lb)
40 / 5
40 / 5
64 / 18
64 / 18
97 / 21
97 / 21
Chilled Water Coil
Type
Finned Tube
Quantity
1
1
1
1
1
1
Face Area (sq ft)
1.8
1.8
2.8
2.8
5.2
5.2
Nominal Airflow (cfm)
High
330
360
600
620
940
1080
Medium
300
330
540
600
850
940
Low
260
300
460
540
740
850
Discharge
4-way
4-way
4-way
4-way
4-way
4-way
Unit Water Volume (gal)
0.29
0.29
0.45
0.45
0.79
0.79
FAN
Type
Centrifugal
Quantity
1
1
1
1
2
2
Diameter (in.)
12
12
15
15
14
14
Horsepower per fan (Hp)
1
/
8
1
/
8
1
/
6
1
/
6
1
/
6
1
/
6
CONNECTIONS (Sweat)
Chilled Water Inlet, OD (in.)
5
/
8
5
/
8
7
/
8
7
/
8
7
/
8
7
/
8
Chilled Water Outlet, OD (in.)
5
/
8
5
/
8
7
/
8
7
/
8
7
/
8
7
/
8
Condensate, ID (in.)
3
/
8
3
/
8
3
/
8
3
/
8
3
/
8
3
/
8
Filtration
Type
Cleanable Wire Framed
Quantity
1
1
2
2
3
3
Arrestance
80%
80%
80%
80%
80%
80%
Condensate Pump
Maximum Head (in.)
30
30
30
30
30
30
Nominal Flow Rate (gpm)
0.1
0.1
0.1
0.1
0.1
0.1
HEATING OPTION
Electric Heating Capacity (kW)
1.5
1.5
3.0
3.0
5.0
5.0
Hot Water Heating Capacity (Btuh)
17,100
N/A
27,300
27,900
41,200
45,200
Hot Water Coil Connection, OD (in.)
(Sweat)
5
/
8
N/A
5
/
8
5
/
8
5
/
8
5
/
8
Branch Duct Option
Branch Duct Connections (quantity)
2
2
2
2
2
2
Branch Duct Diameter (in.)
5
5
5
5
6
6
Ducted Air Volume (cfm)
80
80
100
125
200
220
Fresh Air option
Fresh Air Connections (quantity)
1-2
1-2
1-3
1-3
1-3
1-3
Fresh Air Duct Diameter (in.)
3
3
3
3
3
3
Fresh Air Volume (cfm)
40
40
60
65
90
95
ID
—
Inside Diameter
OD —
Outside Diameter
918