Marley U1000FA Installation, Operation & Maintenance Instructions Manual Download Page 3

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Installation of Heater in T-Bar Ceiling
Using Frame Kit Model HTBF

1. Determine the desired location for the heater.

2. Remove heater from carton, remove front cover, heater

assembly from back box.

3. Remove T-Bar frame, envelope containing mounting screws

from carton.

4. Mount the heater backbox to the HTBF kit frame using the

four screws provided. Refer to figure 2.

5. Place the HTBF frame with heater backbox installed in ceil-

ing framing and secure in position. Secure the frame to the
building structure as necessary using appropriate wire to pre
vent the heater and frame from falling.

6. Bring power supply cable to heater location. Remove the

desired knockout in backbox and install cable using an
appropriate cable clamp, leaving at least six inches (153mm)
of wire in box for connections.

NOTE:

Power supply cable must enter backbox in location

behind the disconnect switch assembly.

7. Complete the installation by following the steps in the "Wiring

of heater" and "Installation of Front Cover(Grille)" sections."

Field Conversion for Lower Wattage

NOTE:

Refer to specification chart for lower wattage ratings

which are available.

To convert heater to lower wattage rating, completely remove red
jumper wire from both heating elements (See Figure 3). Discard
this jumper. Be sure remaining wires are securely connected.

Wiring of Heater

1. Following wiring diagram (Figure 4) connect supply wiring

and thermostat wiring to heater lead wires in back box.

NOTE:

For 120 and 277 volt heaters connect the white neutral

supply lead to the heaters white pigtail lead, and connect the
black supply lead to the heaters black pigtail lead.  For 208 and
240 volt heaters change the color of the heaters white pigtail
lead to black by wrapping with black electrical tape. (Most electri-
cal codes require the supply leads to be conneced to black
leads).  Then connect the two black supply leads to the two
black receptacle leads.  Connect the two red thermostat leads to
thermostat as shown in wiring diagram.

2. Insert wiring plug from heater/fan assembly into socket in

back box.

3. Fit heater/fan assembly into back box and secure in place

with (2) screws provided through the center slots in the fan
assembly.

NOTE:

Use the screws provided by the factory to install

heater/fan assembly to the back box.

4. Turn disconnect switch mounted on heater/fan assembly

“ON”.

INSTALLATION OF FRONT COVER (GRILLE)

1. Mount grille over brackets at the top of the heater. Sheet

metal tabs at the top end of the grille hook onto the brackets
at the top end of the heater’s fan panel assembly.

2. Insert screw through bottom hole on the grille. The screw with

thread into the backbox. Tighten the screw until the grille is
flush to the ceiling or mounting frame. BE CAREFUL NOT TO
OVER TIGHTEN.

RISK  OF  FALLING  –  THE  HEATER  BACKBOX  MUST  BE
SECURELY MOUNTED TO THE BUILDING STRUCTURE AND
THE  BUILDING  STRUCTURE  MUST  BE  CAPABLE  OF  SUP-
PORTING  THE  HEATER  WITH  ALL  ACCESSORIES.    THE
HEATER WEIGHT WITH ACCESSORIES IS AT LEAST 18 LBS
(18.2 KG).

Figure 2

Figure 3

Remove red jumper
for lower wattage
rating