SERVICING
45
24.0KW, 42°F Rise, 240 V = 1800 CFM from the
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.
600 16 25 38 51 - - - -
700 14 22 33 43 - - - -
800 12 19 29 38 57 - - -
900 11 17 26 34 51 - - -
1000 10 15 23 30 46 - - -
1100 9 14 21 27 41 55 - -
1200 8 13 19 25 38 50 - -
1300 7 12 18 23 35 46 - -
1400 7 11 16 22 32 43 54 65
1500 6 10 15 20 30 40 50 60
1600 6 9 14 19 28 38 47 57
1700 6 9 14 18 27 36 44 53
1800 5 8 13 17 25 34 42 50
1900 5 8 12 16 24 32 40 48
2000 5 8 12 15 23 30 38 45
2100 5 7 11 14 22 29 36 43
2200 4 7 11 14 21 27 34 41
2300 4 7 10 13 20 26 33 39
TEMPERATURE RISE (°F) @ 240V
BTUH 10200 16200 20400 23800 32400 48600 66500 71600
ELECTRIC HEATER CAPACITY BTUH
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
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 eort 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.
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
communicating heat pump is installed. Comfort Setting
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 rst 5
Comfort Settings. These rst 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.
Comfort Setting Option 1) 10 Minute System Target
Runtime
Comfort Setting Option 2) 15 Minute System Target
Runtime
Comfort Setting Option 3) 20 Minute System Target
Runtime
Comfort Setting Option 4) 25 Minute System Target
Runtime
Comfort Setting Option 5) 30 Minute System Target
Runtime
This system will automatically
determine if the heat pump is capable of satisfying the
thermostat in the selected System Target Runtime. If the
heat pump is unable to satisfy in the selected time, electric
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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