Carrier 39S handleiding
Handleiding
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LEGEND
CONSTANT CFM CONTROL OPTION
With the constant cfm option the pressure transducer measures
differential pressure (DP, units of in. wg) across the fan inlet “noz-
zle.” The DP signal goes to the VFD which has the control logic,
and the controls change fan RPM to try to maintain the DP set-
point. As the filters load up, the airflow drops and the control loop
speeds up the fan to compensate, keeping the DP (and therefore
cfm) the same. Below is the procedure for changing the DP set-
point. Table 9 show airflow and corresponding DP settings to
choose from. NOTE: The VFD will limit the max RPM and motor
current to protect the motor and drive, so some of these settings
won’t be possible with all static pressures.
To change constant cfm setpoint: change VFD parameter 4011 to
the value in the table that corresponds to the desired cfm. Interpo-
late as needed to reach cfm values between the table values.
For example:
To operate HHA20 at 2040 cfm, go to the HHA16-25 table
(Table 9), locate 2040 cfm, read DP Set Point of 7.0 in. wg (first
column), so 7.0 will be the setting for parameter 4011.
START-UP
Pre-Start-Up
BUILDING ENVELOPE
All building windows and doors should be installed and closed be-
fore starting unit. During summer construction, avoid unit sweat-
ing by allowing for gradual pull down: use elevated chilled water
temperature, reduce chilled water flow rate (gpm), and use maxi-
mum available airflow.
HEATING FLUID TEMPERATURE
Maximum entering water temperature is 180°F, unless nameplate
indicates 200°F.
TEMPERATURE CONTROLS
Check that unit or wall-mounted thermostat or field-supplied con-
troller is connected to the unit.
OUTSIDE AIR AND FREEZE PROTECTION
Freeze protection measures are customer-provided and installed,
and include but are not limited to low-limit thermostats, automatic
temperature controls, and use of glycol-based heat transfer fluids
(see the section Coil Freeze-Up Protection on page 40).
DAMPER OPERATION
If “locking quadrant” manual damper operator is provided, set to
desired position. If a damper actuator is provided, ensure that the
actuator opens the damper when the fan turns on, and closes when
the fan stops. Test mixing box controls to make sure the outside air
damper closes on power failure or upon activation of customer-
supplied and installed low-limit thermostat or other freeze protec-
tion device.
Checklist
Make a walkway inside unit components to protect insulation.
Remove all construction debris from unit interior. Remove walk-
way before starting unit.
FILTERS
Install unit filters in all filter sections.
Table 8 — VFD Parameters — All Control Options
UNIT HP
PARAMETER 2003/9906 1105/2008
115/160 208-230 460V
MAX
FREQ
FLA FLA FLA
HHA08/12
1.0 3.75 3.75 1.81 76
1.5 — 4.83 2.30 85
HHA16/20/25
2.0 — 6.44 2.88 55
3.0 — 8.74 4.37 59
5.0 — 14.60 6.90 76
FLA — Full Load Amps
Table 9 — Constant cfm Differential Pressure (DP) Set
Points
HHA04 THROUGH HHA12 HHA16 THROUGH HHA25
DP Set Point
(in. wg)
Parameter 4011
cfm
DP Set Point
(in. wg)
Parameter 4011
cfm
0.5 353 2.0 1095
1.0 433 2.5 1222
1.5 521 3.0 1372
2.0 560 3.5 1475
2.5 614 4.0 1561
3.0 694 4.5 1662
3.5 752 5.0 1775
4.0 793 5.5 1838
4.5 832 6.0 1916
5.0 869 6.5 1975
5.5 916 7.0 2040
6.0 950 7.5 2223
6.5 983 8.0 2288
7.0 1015 8.5 2352
7.5 1045 9.0 2406
8.0 1075 9.5 2567
8.5 1104 10.0 2641
9.0 1132 10.5 2701
9.5 1169 11.0 2748
10.0 1205 11.5 2805
10.5 1239
11.0 1264
11.5 1305
CAUTION
If unit is marked for 200°F maximum entering water tempera-
ture, customer must ensure that water vaporization does not
occur, especially at higher elevations when entering water
temperatures are greater than 190°F.
CAUTION
Ensure that the unit is protected against freezing conditions.
Failure to provide freeze protection may result in equipment or
property damage.
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Productinformatie
| Merk | Carrier |
| Model | 39S |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10967 MB |
