Carrier 48KH - Manual (Page 17)

Table 5 shows heating airflow at various tempera­
ture rises. Table 6 shows both heating and cooling
airflows at various external static pressures for
Models 48KH,KL direct-drive units. Refer to these
tables to determine airflow for system being in­
stalled. See Table? for rated cooling and heating
airflows.
NOTE: Be sure all supply- and return-air grilles are
open, free from obstructions and adjusted properly.
Table 7 — Rated Cooling and Heating Airflows
«•■wvirinrv imv
3£ti^ è
mm s
«iecfeicai power to
. Bo «tire to
NOTEiWhen operating the 208/230-volt, 3-phase
version of Models 48KH048, 48KL060 and 48KH
060 at 208 volts, lead connections of blower motor
must be changed as indicated on unit wiring label to
ensure proper airflow.
CAOTION: Do clm^ hiowesHiaotoE' lead
eonE£ercti.
Heating and/or cooling airflow of 208/230-v
direct-drive blower motors can be changed by
changing the lead connections of blower motor.
Motor leads are color-coded as follows:
black — high speed
blue — medium speed
red — low speed
NOTE: Some direct-drive blower motors do not
have lead for medium speed. Factory connections
and available optional connections are shown in
Table 6.
Eor all units, motor lead connected to heat relay
determines heating speed and resulting airflow; and
motor lead connected to cooling relay determines
the cooling speed and resulting airflow. See unit
wiring label.
To change heating and/or cooling speed, connect
appropriate color-coded lead to appropriate relay.
Be sure to properly insulate any unused motor lead.
RATED EXTERNAL RATED
MODEL 48—
COOLING STATIC HEATING
AIRFLOW PRESSURE AIRFLOW
(cfm)* (in. wg)* (cfm)
KL018300BE 600 0 10 555
KL024300BE 825 0 10 555
KH024300BE 825 0 10 835
KL030300BE 0 15 465
KH030300BE 1088 0 15 835
KL036300BE T 200 ” 0.15 " 835......
KL036500CE 1200 0 15 835
KL036600CE 1200 0 15 835
KH036300BE 1215 0 15 1155
KH036300BF 1215 0 15 1445
KH036500CE 1215 0 15 1155
KH036500CF 1200 0 15 1445
KL042300BE 0 15 695
KL042500CE 1400 0 15 695
KH042300BE 1400 0 15 925
KH042500CE 1400 0 15 925
KL048300BE 1600 0 20 925
KL048500CE 1600 0 20 925
KL048600CE 1600 0 20 925
KH048300BE 1600 0 20 1155
KH048300BF 1600 0 20 1445
KH048500CE 1600 0 20 1155
KH048500CF 1600 0 20 1445
KL060300BE 1980 0 20 1155
KH060300BE 1980 0 20 1155
KH060300BF 1980 0 20 1735
*Rated in accordance with ARI Standard 210-81
See Make Wiring Connections, Special Procedures
for 208-v Operation section for proper procedures to
insulate an unused electrical lead.
When installing a 208- or 230-v direct-drive unit
that is factory-connected for heating and cooling
speeds that are not the same, and same speed for
both heating and cooling is required for a particular
application, connect appropriate color-coded lead
to terminal 2 of cooling relay and connect a field-
supplied jumper between heat relay and terminal 2
of cooling relay. Be sure to properly insulate unused
motor lead(s).
17