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2
cauTIon:
Disconnect all power coming to heater at
main service panel before wiring or servicing.
For units with built in thermostats, rotate the thermostat
knob fully clockwise. Heater should activate. When the
room reaches the desired temperature, slowly rotate the
knob counterclockwise until unit shuts off. The heater will
automatically cycle around this preset temperature setting.
All units contain a Manual Reset High Temperature Cutout,
which will shut the heater off in the event of abnormally high
operating temperatures. The high temperature cutout can
be reset by switching the main power off and waiting five
minutes before switching it to back on. In addition a Red
Warning Light will activate providing a visual warning. If this
condition exists, disconnect all power to the unit and call a
licensed electrician for service. Do not use heater until the
problem is determined and corrected.
enSuRe poWeR To
THe unIT IS DISconnecTeD pRIoR To SeRvIcInG oR
peRFoRmInG cLeanInG.
operation and
maintenance
x 8.6cm) deep, minimum. Care should be taken to install
the recess box in the correct orientation to accommodate
grille.
note the position of the electrical entry knockouts
and orient recess box according to Figure 1.
Ensure all
required clearances are met.
Ensure recess box flanges are flush with the finished
wall surface
. For new construction, the sides of the recess
box are marked with guidelines to allow for ½” (1.3cm) and
5/8“ (1.6cm) drywall thickness if drywall is to be added at a
later date. Secure recess box to studs with screws using
holes provided on sides or flange of recess box. Remove
appropriate electrical knockout and secure supply wire using
an approved strain relief connector leaving 6” (15.2cm) of
wire leads in the recess box.
Step 3 - mounting the Heater assembly
Insert the heater assembly into the recess box ensuring that
the tab on the heater assembly slides into the slot in the
recess box. Ensure the heater assembly is fully seated and
secure to the recess box using the captive screw provided.
Be careful not to handle the heater where the cutout is
located.
Step 4 –electrical connections
WaRnInG:
Hazard of severe shock.
cauTIon:
Disconnect all power coming to heater at
main service panel before wiring or servicing.
Turn off power supply at the electrical panel. Route supply
wires from circuit breaker through wall thermostat to heater.
For models with built in thermostat route from circuit breaker
to heater.
Supply wire must be of
two wire plus ground
variety, with
a rating capable of handling all loads on the circuit. Supply
wire should be rated for a minimum of 140°F (60°C)
. Make
electrical connection according to relevant wiring diagrams.
PRODUCT LEGEND: X YY R WW VV B T C Z
X
YY
R
WW
VV
B
T
C
Z
R
RETAIL
SH
SINGLE ELEMENT
R REGISTER GRILL
05 500 07
240
B BULK PACKAGING T THERMOSTAT C WALL CAN W WHITE
T
COMMERCIAL TRADE
DH
DOUBLE ELEMENT
07 750 10
240
A ALMOND
WH
SINGLE ELEMENT
10 1000 11
120
15 1500 21
208
20 2000 31 240/208
model Key Information
RSH & TWH models Wiring Diagram
High Limit
(120V Marked N)
Basic Heater Field Connection
Black
L1
Ground
White
White Neutral 120V
Black L2 for 240V
Motor
Element
!
noTe:
All units rated for 240/208 V provide 76% wattage of
240V rating when connected to 208 V.
RDH models (Double element) Wiring Diagram
High Limit
Motor
Element
Thermostat
Blue
Red
Black
240 Volt
Line (L1)
Optional *
240 Volt
Line (L2)
!
noTe:
For reduced heat output do not connect wire C to 240 V
line (L2). Wire C must be capped off using a wire nut supplied by
the customer when not used.
cat. no.
volts
Wattage
connections
RDH2010 or RDHR2010
240
2000W
L1-A, L2-B & C
1000W
L1-A, L2-B ONLY*
RDH1507 or RDHR1507
240
1500W
L1-A, L2-B & C
750W
L1-A, L2-B ONLY*
Make connections using approved wire nut connectors and
secure the grounding wire to the ground screw on the heater
chassis. On models with Register Style Front Grilles only,
a terminal box cover plate is provided. Insert the tabs of the
cover plate into the slots and secure the other side of plate
with the screws provided.
Step 5 – Secure the Front panel
If your unit has a built in thermostat remove the plug on
the front panel. Fasten the Front Grille using the screws
provided. It is important to note that the front grille is oriented
in the required positions shown in Figure 1 and on the Multi –
Directional grille. For units with built in thermostat push knob
onto thermostat shaft through plug hole.
