8
ACC-SVN67D-EN
Installation
6. The electric heater element assembly has "BOTTOM" stamped in the mounting panel to identify
the proper position for mounting.
7.
Refer to
Table 2
. If the unit/heater combination being installed is the same as any in this table
and the application is for horizontal airflow
, the limit control TCO-A must be replaced with
the extra limit control shipped with the heater. Replace TCO-A following the instructions in
steps 8 and 9. If the unit/heater combination being installed does not correspond to any in this
table or if the application is for downflow airflow, skip steps 8 and 9 and go on to step 10.
8. TCO-A is the limit control located in the center or right part of the heater mounting plate that
is located on the bottom of the two heater element assemblies. See
Figure 4
. To replace this
device, first remove the two wires connected to the terminals. Next, remove the two screws
which secure it to the heater element mounting plate. Once TCO-A has been removed from the
heater element mounting plate, discard this device.
Figure 3.
Electric heater element panel
Table 2.
TCO-A replaced for Horizontal Duct Configuration
Unit Model Number
Electric Heater Model
Number
TCO-A
location
TSC120E4**B
BAYHTRA427, 436, 454
Right
TSC120EW**B
BAYHTRAW36, W54
Right
WSC120EW
BAYHTRBW36, W54
Right
THC072E4, WSC090E4
BAYHTRU427, 436
Center
WSC090EW
BAYHTRUW27, W36
Center
WSC072E3
BAYHTRW327, 336
Center
TSC090E4, WSC072E4
BAYHTRW427, 436
Center
TSC090EW, WSC072EW
BAYHTRWW27, W36
Center