a pre-programmed table of airflows.
The unit must be configured to operate properly with system
components with which it is installed. To successfully configure a
basic system (see information printed on circuit board label located
next to select pins), move the 6 select wires to the pins which
match the components used.
a. AUX HEAT kW/CFM—SELECT HEATER RANGE
FOR SIZE OF ELECTRIC HEATER INSTALLED
Installer must select the auxiliary heat airflow approved for
application with kW size heater installed. If no heater is
installed, this step can be skipped. Each select pin is
marked with a range of heaters for which airflow (also
marked), is approved. For increased comfort, select the
narrowest kW range matching the heater size, for example,
0–10 for 10–kW heater. This airflow must be greater than
the minimum for CFM for electric heater application with
the size system installed for safe and continuous operation.
(See Tables 4A, 4B, 4C, 5 & 6 for airflow delivery and
minimum CFM.) Note that airflow marked is the airflow
which will be supplied in emergency heat mode and
heating mode on air conditioners when electric heat is the
primary heating source. In heat pump heating mode when
electric heaters are energized, the ECM will run the higher
Fig. 10—Typical Installation
C00063
INDOOR
THERMOSTAT
DISCONNECT
PER NEC*
FROM
POWER
SOURCE
RETURN
AIR
TOP COVER
*NEC - NATIONAL ELECTRICAL CODE
Fig. 11—50XZ with Duct Covers On
C00092
Duct Covers
10
