Notes:
1. No electric heat installed
2. Air handler units are tested to UL60335-2-40 standards up to 0.6 in. W.C. external static pressure.
3. Dry coil conditions only; tested without filters
4. For optimal performance, external static pressures of 0.2 in. W.C. to 0.5 in. W.C. are recommended. Heating applications are tested at 0.5 in. W.C. external static pres
-
sure.
5. Airflow data shown is from testing performed at 230 V. JMET units use a standard ECM constant torque motor and there is minimal variation of airflow at other distribu
-
tion voltage values. The above data can be used for airflow at other distribution voltages.
Table 2:
Airflow data (CFM)
Models
Blower
motor speed
External static pressure (in. W.C.)
Unit
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
JMET08B
High (5)
CFM
1100
1050
1000
925
875
825
775
725
675
600
W
113
122
131
140
149
158
167
176
185
194
Medium High (4)
CFM
1025
975
900
850
800
750
675
625
575
500
W
95
104
112
120
129
137
145
154
162
171
Medium (3)
CFM
925
875
800
750
700
625
575
500
450
400
W
78
85
93
100
108
115
123
130
138
145
Medium Low (2)
CFM
850
775
725
650
575
525
450
—
—
—
W
63
70
77
83
90
96
103
—
—
—
Low (1)
CFM
575
500
425
—
—
—
—
—
—
—
W
32
38
44
—
—
—
—
—
—
—
JMET12B
High (5)
CFM
1300
1250
1225
1175
1125
1075
1025
1000
950
900
W
177
184
192
201
212
223
235
249
263
279
Medium High (4)
CFM
1475
1425
1400
1375
1325
1300
1250
1225
1200
1150
W
259
266
275
285
296
308
322
336
351
367
Medium (3)
CFM
1150
1075
1025
975
925
875
800
750
700
650
W
118
129
139
150
160
171
181
192
202
213
Medium Low (2)
CFM
1025
975
900
850
800
725
675
625
550
500
W
94
103
113
122
132
141
151
160
170
179
Low (1)
CFM
750
675
600
525
450
400
—
—
—
—
W
51
57
64
70
77
84
—
—
—
—
JMET12C
High (5)
CFM
1675
1650
1625
1575
1550
1525
1475
1425
1375
1325
W
294
303
314
326
339
353
369
386
404
424
Medium High (4)
CFM
1500
1475
1450
1400
1375
1325
1250
1200
1125
1050
W
216
225
235
247
259
273
288
304
322
341
Medium (3)
CFM
1350
1325
1275
1225
1175
1100
1025
975
900
800
W
153
165
178
190
203
216
228
241
253
266
Medium Low (2)
CFM
1075
1000
925
850
775
700
625
550
475
425
W
87
96
105
114
123
131
140
149
158
167
Low (1)
CFM
950
875
800
725
650
575
500
425
—
—
W
67
78
88
97
105
113
120
127
—
—
JMET16C
High (5)
CFM
2075
2050
2000
1975
1950
1925
1900
1875
1850
1825
W
501
516
531
546
560
575
590
605
620
634
Medium High (4)
CFM
1875
1850
1825
1775
1750
1725
1675
1650
1625
1600
W
374
388
402
415
429
443
456
470
484
497
Medium (3)
CFM
1500
1475
1425
1400
1350
1300
1250
1175
1100
1025
W
197
210
223
236
249
262
276
289
302
315
Medium Low (2)
CFM
1325
1250
1200
1125
1075
1000
950
875
800
750
W
132
144
155
166
178
189
200
212
223
234
Low (1)
CFM
1050
975
900
825
750
650
575
500
425
—
W
79
88
96
105
114
122
131
140
148
—
JMET18D
High (5)
CFM
2250
2225
2200
2175
2125
2100
2075
2050
2025
2000
W
595
606
618
633
648
666
685
705
727
751
Medium High (4)
CFM
2075
2050
2000
1975
1950
1900
1875
1850
1800
1775
W
444
460
475
491
506
522
537
553
568
584
Medium (3)
CFM
1875
1850
1800
1775
1725
1700
1650
1625
1575
1525
W
329
344
359
374
389
404
419
434
449
463
Medium Low (2)
CFM
1450
1400
1325
1250
1200
1125
1050
1000
925
850
W
153
166
179
192
206
219
232
245
258
271
Low (1)
CFM
1300
1225
1150
1075
1000
925
850
800
725
650
W
120
131
143
154
166
178
189
201
212
224
Clearances
It is essential to provide the following clearances:
• Maintenance and servicing access - minimum 36 in. from the front
of the unit for blower motor
• The supply air ductwork connected to this unit is designed for 1 in.
clearance for the first 18 in. of duct length to combustible materials.
• A combustible floor base accessory is available for downflow appli
-
cations of this unit, if required by local code.
External duct static
To determine total external system static pressure, complete the
following:
1. Drill a hole 12 in. away from the air handler in the supply air duct. You
must take the return air pressure reading between the indoor coil and
the air handler.
2. Measure the supply air static pressure. Record this positive
number.
3. Measure the return air static pressure. Record this negative
number.
4. Treat the negative number as a positive, and add the two numbers
together to determine the total external system static pressure.
Figure 2:
Duct static measurements
Table 3:
Electrical heat - minimum fan speed (XAH)
Heater kit
models
1,2
Nominal kW
at 240 V
Air handler models
JMET08B
JMET12B
JMET12C
JMET16C
JMET18D
8HK(0,1)6500206
2.4
High (5)
High (5)
High (5)
Medium high (4)
Medium (3)
8HK(0,1)6500506
4.8
High (5)
High (5)
High (5)
Medium high (4)
Medium (3)
8HK(0,1)6500806
7.7
High (5)
High (5)
High (5)
Medium high (4)
Medium (3)
8HK(0,1)6501006
8HK06501025
9.6
High (5)
3
High (5)
High (5)
Medium high (4)
Medium (3)
8HK(1,2)6501506
8HK06501525
14.4
—
High (5)
High (5)
Medium high (4)
Medium (3)
8HK(1,2)6502006
8HK16502025
19.2
—
High (5)
High (5)
Medium high (4)
Medium (3)
8HK(1,2)6502506
8HK16502525
24
—
—
—
—
Medium (3)
1. (0,1) - 0 = no service disconnect or 1 = with service disconnect
2. (1,2) - 1 = with service disconnect, no breaker jumper bar or 2 = with service disconnect and breaker jumper bar
3. For one-phase 8HK not approved for horizontal right with heat pump applications
Table 4:
Electrical heat with heat pump: minimum fan speed (XAF)
Heater kit models
1
2
Nominal kW
at 240 V
Air handler models
JMET08B
JMET12B
JMET12C
JMET16C
JMET18D
8HK(0,1)6500206
2.4
Medium (3)
High (5)
High (5)
Medium (3)
Medium (3)
8HK(0,1)6500506
4.8
Medium (3)
High (5)
High (5)
Medium (3)
Medium (3)
8HK(0,1)6500806
7.7
Medium (3)
High (5)
High (5)
Medium (3)
Medium (3)
8HK(0,1)6501006
8HK06501025
9.6
Medium (3)
High (5)
High (5)
Medium (3)
Medium (3)
8HK(1,2)6501506
8HK06501525
14.4
—
High (5)
High (5)
Medium (3)
Medium (3)
8HK(1,2)6502006
8HK16502025
19.2
—
High (5)
High (5)
3
Medium high (4)
Medium (3)
8HK(1,2)6502506
8HK16502525
24
—
—
—
—
Medium (3)
1. (0,1) - 0 = no service disconnect or 1 = with service disconnect
2. (1,2) - 1 = with service disconnect, no breaker jumper bar or 2 = with service disconnect and breaker jumper bar
3. -2006 max ESP is 0.4 in., three-phase 8HK not approved for downflow applications. -2025 cannot be used with heat pump applications.
