Control System – General Information; System Target Runtime; Electric Heater Capacity Btuh - Amana ASXC16 Service And Troubleshooting

SERVICING
Answer: 24.0KW, 42°F Rise, 240 V = 1800 CFM from the
TEMPERATURE RISE chart on the right.
Heating output at 220 V = 24.0KW x 3.413 x .84 = 68.8
MBH.
Actual CFM = 1800 x .84 Corr. Factor = 1400 CFM.
NOTE: The temperature rise table is for sea level
installations. The temperature rise at a particular KW
and CFM will be greater at high altitudes, while the
external static pressure at a particular CFM will be
less.
TEMPERATURE RISE (°F) @ 240V
3.0 4.8 7.2
CFM
kW kW kW
600 16 25
700 14 22
800 12 19
900 11 17
1000 10 15
1100 9 14
1200 8 13
1300 7 12
1400 7 11
1500 6 10
1600 6 9
1700 6 9
1800 5 8
1900 5 8
2000 5 8
2100 5 7
2200 4 7
2300 4 7

ELECTRIC HEATER CAPACITY BTUH

HTR 3.0 4.7 6.0
KW KW KW KW
BTUH 10200 16200 20400 23800 32400 48600 66500 71600
FORMULAS:
Heating Output = KW x 3413 x Corr. Factor
Actual CFM = CFM (from table) x Corr. Factor
BTUH = KW x 3413
BTUH = CFM x 1.08 x Temperature Rise (T)
CFM = KW x 3413
1.08 x T
T = BTUH
CFM x 1.08
9.6 14.4 19.2 24.0
kW kW kW kW
38 51 - -
33 43 - -
29 38 57 -
26 34 51 -
23 30 46 -
21 27 41 55
19 25 38 50
18 23 35 46
16 22 32 43
15 20 30 40
14 19 28 38
14 18 27 36
13 17 25 34
12 16 24 32
12 15 23 30
11 14 22 29
11 14 21 27
10 13 20 26
7.0 9.5 14.2
KW KW KW
Control System – General Information
The air handler contains internal logic to control equipment
staging. An adjustable target runtime is available (range
from 1 to 240 minutes) and set through the appropriate
system menu. The system will constantly be adjusting
staging in an effort to satisfy the thermostat call for cooling
(Y only) or heating (W Only) as close to the set target
runtime as possible. See information below for setting
options.
Comfort Setting Menu (CFS): There are 6 options
available in the Comfort Setting Menu which impacts
system target run time and electric heat functionality.
Electric heat operation adjustments only apply if a
28.8
communicating heat pump is installed. Comfort Setting
kW
Options 1 – 5 have set values for the System Target
- - Runtime and option 6 enables additional menus to
customize all comfort settings. See list below for the
- -
System Target Run times associated with the first 5
- -
Comfort Settings. These first 5 options are setup to help
- -
satisfy the thermostat slower or faster based on the
- -
selection where option 1, with a 10 minute Target Runtime,
- -
is attempting to satisfy much faster than option 5, with a 30
- -
minute Target Runtime.
- -
54 65

System Target Runtime:

Comfort Setting Option 1) 10 Minute System Target
50 60
Runtime
47 57
Comfort Setting Option 2) 15 Minute System Target
44 53
Runtime
42 50
Comfort Setting Option 3) 20 Minute System Target
40 48
Runtime
38 45
Comfort Setting Option 4) 25 Minute System Target
36 43
Runtime
34 41
Comfort Setting Option 5) 30 Minute System Target
Runtime
33 39
Electric Heat Adjustment: This system will automatically
determine if the heat pump is capable of satisfying the
thermostat in the selected System Target Runtime. If the
19.5 21.0
heat pump is unable to satisfy in the selected time, electric
KW KW
heat settings will determine how many attempts should be
given to the heat pump before temporarily locking it out
and using the furnace. These electric heat settings also
determine at what time the system should remove the
temporary heat pump lockout and run the heat pump again.
There are four adjustable items associated with back up
electric heat operation control. In the same way as the
System Target Time, each of these items have defaulted
values for Comfort Settings 1 – 5. Only when Comfort
Setting 6 is selected will each item be available for full
adjustment.
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