Marley R1500 Installation & Maintenance Manual page 3

Figure 4
HOLE
End View
3. If the thermostat is controlling more than one heater, the total
of all heater amperage ratings (Table 1) cannot exceed 25
amps at 120 volts AC thru 240 volts AC. Refer to Table
2 for correct wire, circuit breaker, or fuse sizing.
4. Connect one red and one black thermostat lead to power
wiring per wiring diagram (Fig. 6) using properly sized listed
wirenuts (provided).
5. Fold wires back into wiring compartment behind thermostat
to clear fan deck.
Figure 5
Figure 6
R Series only
®
TO INSTALL FAN DECK ASSEMBLY
NOTE: Fan deck assembly should not be installed until after the
drywall phase of construction is complete. Dust from drywall
installation and joint compound can be harmful if it gets inside fan
deck components.
1. Locate fan deck and mounting rails in top of back box.
2. Insert flanges on fan deck into mounting rails and slide back
until fan deck stops (see Fig. 7).
3. Make wiring connections, attaching one red and one black
thermostat lead to two (2) black heater leads for 240V or to
black and white heater leads for 120V with wirenuts
(provided). Connect field ground lead to bare ground wire
with wirenut (provided). See Fig. 6.
4. Remove 1/2" knockout from grille and install grille using two
oval head screws. Push thermostat knob on thermostat
shaft.
5. Reconnect power at main fuse or circuit breaker distribution
panel.
BACK BOX
END CAP
RT2 Series only
TO CHANGE WATTAGE OUTPUT
The chart shows the wattages available by model. Each heater
is factory wired for its maximum wattage. The last two columns
in the chart refer to the jumpers on the CLIP 'n' Fit
change wattage, clip out Jumper 1 and/or Jumper 2 as shown in
the chart below. Completely remove jumpers by clipping at both
ends as close to the board as possible.
WATTAGE
R2404 & R2004 &
R2404T2 R2004T2
@240V @208V @240V
2400 1800
2000
1800 1350
1500
1200
900 1000
600 450
500
BLUE
JUMPER
Clip 'n' Fit
MODEL VOLTS
WATTS/AMPS
R1500
120
1500W/12.5A
R1500T2
240
R2004
2000W/8.3A
R2004T2 208 1500W/7.2A
R2404 240
2400W/10.0A
R2404T2
208 1800W/8.7A
Note: "IF" Inner Frame models must be used with RBB Back
box.
TOTAL AMPS
0 thru 12
12.1 thru 16
16.1 thru 24
Figure 7
TOP OF BACK BOX
MOUNTING RAIL
FLANGE ON FAN DECK
3
®
JUMPER
1
R1500 &
R1500T2
Blue
@208V @120V
Jumper
1500 Leave in
1500
1125
1125 Clip out
750 750 Leave in
375 Clip out
375
RED
JUMPER
® Board
TABLE 1
WATTS/AMPS WATTS/AMPS
750W/6.3A
1125W/9.4A
1500W/6.3A
1000W/4.2A
1125W/5.4A
750W/3.6A
1800W/7.5A
1200W/5.0A
1350W/6.5A
900W/4.3A
TABLE 2
WIRE SIZE
CIRCUIT BREAKER
(COPPER) OR FUSE SIZE
#14
15 Amps
#12 20 Amps
#10
30 Amps
Board. To
JUMPER
2
Red
Jumper
Leave in
Leave in
Clip out
Clip out
WATTS/AMPS
375W/3.1A
500W/2.1A
375W/1.8A
600W/2.5A
450W/2.2A