Rheem Raypak R207A Installation And Operation Manual page 22

240 VAC Wiring
For 240 VAC input power to the unit, connect the black
wire to the "L1" or hot leg of the power supply. Connect the
red wire to the "L2" or second hot leg of the power supply.
There should be no connection to the white wires for
240 VAC operation. Attach a wire nut to each white wire
independently.
A WARNING: DO NOT attempt to operate the heater
at 208 VAC.
240V LOW NOx HEATER
L1
BLACK
SUPPLY
L2
SIDE
GROUND
GREEN
Figure 34. 240 VAC Wire Connection
Heater must be electrically grounded and bonded in
accordance with local codes, or, in the absence of local
codes, with the latest edition of the National Electrical
Code, ANSI/NFPA 70. (Canada - Canadian Electrical
Code, CSA C22.1, Part 1 and Part 2.)
:
CAUTION If the transformer's primary side is wired
for 120 VAC and 240 VAC is applied, damage to the
transformer and PC board may result. Such damages
are not covered under manufacturer's limited warranty.
Input power to the heater (120 or 240 VAC) can
NOTE:
be supplied from the load (pump) side of time clock or
directly from the GFCI power source. It is preferred
that full-time power be supplied to the heater from
the GFCI power source, and that the heater be
controlled by the fireman's switch connection or
using a two or three-wire remote. If using a switched
GFCI power source, the heater could display false
service indicators on the display panel if the pump is
turned off
.
22
BLACK
HOT
BLACK
RED
HOT
RED
RED
HEATER
7 WIRES
GREEN
WHITE
WHITE