Broan 171H, 170F, 178F, 174F User Manual

MODELS 170F, 174F & 178F
FAN FORCED WALL HEATERS
FINISH ASSEMBLIES

FOR USE WITH BROAN MODEL 171H ROUGH-IN HOUSING

READ AND SAVE THESE INSTRUCTIONS

WARNING

1. ALL ELECTRICAL WORK MUST BE DONE IN ACCOR­DANCE WITH LOCAL OR NATIONAL ELECTRICAL CODE
AS APPLICABLE. FOR SAFETY, THIS PRODUCT MUST
BE GROUNDED. IF YOU ARE UNFAMILIAR WITH METH­ODS OF INSTALLING ELECTRICAL WIRING, SECURE
THE SERVICES OF A QUALIFIED ELECTRICIAN.

2. WHEN WIRING, SERVICING OR CLEANING THIS UNIT,
TURN OFF POWER AND LOCK OUT SERVICE PANEL.
FAILURE TO DO SO COULD ALLOW OTHERS OR THER­MOSTAT TO TURN ON POWER UNEXPECTEDLY WHICH
MAY CAUSE FATAL ELECTRICAL SHOCK.

3. To avoid electrical shock:

• DO NOT install unit in a tub or shower enclosure or any

location where it may come in contact with water.

• NEVER place a switch where it can be reached from a

tub or shower.

4. DO NOT install this unit in an area where chemicals or
other flammables are stored or used. Explosion and fire
may result

.

PLAN THE INSTALLATION

This wall heater finish assembly is intended for installation
into a Broan Model 171H rough-in housing — after the wall
has been completed.

The heater can be operated using the Broan Model 86 Line­Voltage Thermostat from a wall location or the Broan Model
83 Integral Thermostat installed into heater. Purchase the con­trol separately.

CAUTION

1. This product may ONLY be installed horizontally in a wall.
DO NOT MOUNT IN ANY OTHER POSITION.

2. Install heater at least 6” from floor or any adjacent vertical
surface.

3. DO NOT locate heater behind a door, furniture, drapes,
etc., where the air flow to the unit would be restricted.

4. Provide heater with an appropriately-rated electrical cir­cuit to prevent tripped breakers or blown fuses. (See chart
below).

5. DO NOT CONNECT HEATER TO DIMMER SWITCH OR
SPEED CONTROL.

6. To avoid motor bearing damage and noisy and/or unbal­anced impellers, keep drywall spray, construction dust,
etc., off power unit.

7. Please read specification label on product for further infor­mation and requirements.

Follow these basic steps when installing this heater:

• Remove the housing mask.

• Fasten finish assembly inside housing.

• Plug assembly in.

• Attach grille.

!

The table below lists the ratings for each model.

MODELS VOLTS AMPS WATTS BTU/HR

120 8.33/4.16 1000/500 3413/1707

170F 240 4.16 1000 3413

208 3.61 750 2560

120 12.5/6.25 1500/750 5120/2560

174F 240 6.25 1500 5120

208 5.41 1125 3640

178F 240 8.33/4.16 2000/1000 6827/3413

208 7.21/3.61 1500/750 5120/2560

BOLD ratings are factory wired. See "OPTIONAL WIRING
CONVERSIONS" section on pages 2 and 3 for wattage and
voltage conversion instructions.

DRYWALL

GRILLE

WALL
STUD

HEATER

HOUSING

POWER

CABLE

INSTALL THE HEATER ASSEMBLY OPTIONAL WIRING CONVERSIONS

1. Remove housing mask.

Make sure wall has been finished (including paint or wall
paper, etc.) Take out and discard the cardboard mask from
inside of housing.

FASTEN TO

HOUSING WITH

TABS

RETAINING SCREW -

HERE

1. Conversion to half-wattage.

The heater will produce less heat and use less electricity if
converted to half-wattage.

Disconnect ONE of the black wires with an insulated termi­nal from the motor.

BLACK
WIRES

(connected

to motor)

2. Install heater assembly into housing.

Place element end of heater assembly behind the tabs on
the left side of housing. Pivot the assembly in and fasten
with retaining screw from parts bag.

Plug wiring harness into receptacle.

3. Provide desired control.

The heater finish assembly has no adjustable thermostat
control.

If a wall-mounted control has been pre-wired, nothing else
need be done.

If a built-in thermostat is desired, purchase and insert the
Broan Model 83 Integral Thermostat at this time.

WIRING DIAGRAM

WHITE WIRES

BLACK WIRE

(from motor)

2. 120 VAC to 240 VAC Conversion.

(Factory-wired 120 VAC Models 170F and 174F ONLY)

1) Disconnect ONE of the black wires with an insulated
terminal from the motor.

2) Disconnect the two (2) white wires with insulated
terminals from each other. Do not remove wire from
beneath plastic wire tie.

3) Connect black wire to white wire.

NOTE: When heater is converted from 120 VAC to 240 VAC,
half-wattage conversion is not possible

2