Install Instructions

15
5.
Single-phase heater conversion 208/230-v heaters
101A00-104B00 are factory-wired for 3-phase
applications but can be converted to single-phase by
changing one wire as described below.
Three-phase applications: Skip to Step 6. For
single-phase applications, rewire the heater as
follows (see Fig. 13):
a.
Connect RED wire provided with kit to Heater
Relay (HR) and to L1 as shown.
b.
Disconnect YELLOW wire from HR Terminal
2 and reconnect to HR Terminal 3.
d.
Using the wire tie provided, fasten the RED
wire to heater power wire harness near existing
wire tie on heater module. This provides strain
relief for the RED wire. (See Fig. 14.)
Connect the BLACK and RED conductors in the heater power
wire harness to the same L1 pole on single point box TB or fuse
block. Connect the BLUE and YELLOW conductors in the
heater power wire harness to the same L2 pole on single point
box TB or fuse block. (See Fig. 13.)
LEGEND
HR - Heater Relay
HTR - Heater
LS - Limit Switch
Control Wiring
Power Wiring
C14214
Fig. 13 - Single--Phase Heater Wiring
c.
Heater CRHEATER128B00-129B00 only: To
install module, insert heater frame into slot #2 in
heater bracket opening in unit, engage flange on
heater with track in unit and slide heater through
the opening. Fasten heater module to heater
mounting bracket with 8 screws saved from Step
1. (See Fig. 18.)
6. Route power wires from heater module(s) through
the foam bushing in the center partition and into the
single point box. (See Fig. 3.) Connect to terminal
block or fuse blocks per schematics in Appendix A
or B. See Tables at beginning of each Appendix to
identify the appropriate figure.
All heaters are single bank
heaters except
CRHEATER111A00, 112A00, 128B00, 129B00,
268A00, 269A00, 301A00, 318A00, and 321A00
which are dual bank heaters. These heaters will be
wired as two heaters (i.e., 6 leads). Fusing is shown
pictorially on the unit wiring schematic label.
Fig. 12 - Examples of slot 2 without notch and with notch
C14216
Fig. 14 - Typical Single-Phase Wiring Installed
If no single poi
nt box is required for the unit and
heater combination, run the heater power supply
wiring through the grommet holes to the main unit
control box’s field power connection points or to
optional factory--supplied disconnect.