Rheem RGLK, Installation Instructions Manual

Page: 19 / 36

TURN OFF ELECTRIC POWER AT
THE FUSE BOX OR SERVICE PANEL
BEFORE MAKING ANY
ELECTRICAL CONNECTIONS.
ALSO, THE GROUND CONNECTION
MUST BE COMPLETED BEFORE
MAKING LINE VOLTAGE
CONNECTIONS. FAILURE TO DO
SO CAN RESULT IN ELECTRICAL
SHOCK, SEVERE PERSONAL
INJURY OR DEATH.
IMPORTANT: THE FURNACE MUST
BE INSTALLED SO THAT THE
ELECTRICAL COMPONENTS ARE
PROTECTED FROM WATER
(FURNACE CONDENSATE).
ELECTRICAL CONNECTIONS
THE CABINET MUST BE
PERMANENTLY GROUNDED. A
GROUND SCREW IS PROVIDED IN
THE JUNCTION BOX FOR THIS
PURPOSE. FAILURE TO DO SO CAN
RESULT IN FIRE, ELECTRICAL
SHOCK, PERSONAL INJURY OR
DEATH.
The electrical supply requirements are
listed on the furnace rating plate.
Use a separate fused branch electrical
circuit containing a properly sized fuse
or circuit breaker. Run this circuit
directly from the main switch box to an
electrical disconnect which must be
readily accessible and located within
sight of the furnace. Connect from the
disconnect to the junction box on the
left side of the furnace, inside the
control compartment. See appropriate
wiring diagram.
NOTE: The electrical junction box
inside the furnace control compartment
may be relocated to the right side if
necessary. A knockout is provided.
IMPORTANT: L1 (hot) and L2 (neutral)
polarity must be observed when
making field connections to the
furnace. The ignition control on electric
ignition models will not sense flame if
L1 and L2 are reversed.
Installation of the electric supply line
should be in accordance with the
National Electric Code ANSI/NFPA No.
70, latest edition, or Canadian
Electrical Code Part 1 - CSA Standard
C22.1 and local building codes.
This can be obtained from:
National Fire Protection Association
Batterymarch Park
Quincy, MA 02269
Canadian Standards Association
178 Roxdale Boulevard
Roxdale, Ontario, Canada M92 1R3
WARNING
!
WARNING
!
ELECTRICAL WIRING
Install the room thermostat in
accordance with the instruction sheet
in the box with the thermostat. Run the
thermostat lead wires inside the control
compartment. Connect the thermostat
as shown on the wiring diagram. Never
install the thermostat on an outside
wall or where it will be influenced by
drafts, concealed hot or cold water
pipes, lighting fixtures, radiation from
fireplace, rays of sun, lamps, television,
radios or air streams from registers.
Refer to the instructions packed with
the thermostat for best anticipator
adjustment or selection or see below.
HEAT ANTICIPATOR SETTINGS
An initial setting of .15 amps is
recommended. Adjust as needed to
improve comfort level.
A single or two stage thermostat may
be used, however a two-stage
thermostat is recommended.
The room thermostat must be
compatible with the integrated furnace
control on the furnace. All thermostats
available from the furnace
manufacturer’s Parts Department are
acceptable. Generally, all thermostats
that are not of the “current robbing”
type are compatible with the integrated
furnace control we use.
NOTICE: An isolation relay can be
added to prevent any compatibility
problems that may occur. Use a single-
pole, single-throw relay with a 24-volt
AC coil. The contacts should be rated
for .5 amps minimum at 24 volts. See
Figure 14.
THERMOSTAT
FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS
SOLID COPPER WIRE - AWG.
3.0
2.5
2.0 16
16
18 14
14
16 12
12
14 10
12
12 10
12
12 10
10
10
50 100 150 200 250 300
Length of Run – Feet (1)
Thermostat Load - Amps
①
The total wire length is the distance from the furnace to the
thermostat and back to the furnace.
NOTE: Do not use 24 volt control wiring smaller than No. 20.
FIGURE 14
ISOLATION RELAY
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