Brasch BH-P-961 Series Manuel utilisateur

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BH-P-961 SERIES

CONFINED SPACE

UNIT HEATER

Horizontal or Vertical Mounting

ATTENTION:

Read carefully before attempting

to install or operate Unit Heater

FEATURES:

• Forced air electric unit heater available in:

240/208 volt single phase, 5 kw and 240 and

480 three phase 5 kw.

• 240/208 single phase unit is factory wired for

5 kw. The wattage may be changed by moving

jumpers as indicated in table 1.

• 24 volt control standard on three phase unit.

• All units with “T” sufx provided with unit

mounted hydraulic thermostat.

• Mounting bracket included with all units.

PROPER MOUNTING:

The heater(s) should be located along outside

walls or other areas of greatest heat loss.

Multiple heaters should be spaced to set up a

gen

erally

circular air movement, each heater

supporting the air stream of the other.

IMPORTANT: OWNER SHOULD RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE

EXPOSED

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PRINCIPLES OF OPERATION

When the thermostat calls for heat, the elements

are immediately energized, a fan delay brings

on the fan after the elements are heated allow

ing

warm air to circulate. When the thermostat is

satised, the elements are de-energized and the

fan purges the heater of residual heat.

The heater wattage may be eld adjusted only on

model BH-P961-U5000V-T.

Select the desired

wattage from Fig. 1 and move color coded

jumpers as indicated.

Fig.1

INSTALLATION INSTRUCTIONS

All electric unit heaters are shipped fully

assembled. Installation includes hanging the

unit and electrical wiring to the unit.

The wall and/or ceiling structure must be

sufcient to support the combined weight of

the heater and any mounting bracket and

accessories.

Be sure power source is de-energized before

installing heater. Check heater voltage and

phase listed on heater data label on

back of unit to make sure they are the

same as the electrical service supplied.

MOUNTING THE HEATER

Select the mounting location. Be sure to observe

the minimum mounting clearances as shown in

Figure 2.

The heater can be mounted either from the

ceiling or wall depending on the application.

The mounting bracket is supplied with 3/8” holes,

10 inches on center for threaded rod mounting or

direct mounting to the structure.

The heater cabinet also has 3/8” weld nuts 10” on

center to allow threaded rod mounting without the

bracket.

1. Install the mounting bracket in the desired

location

with threaded rod or hardware that is

appropriate for the mounting surface. If using

threaded rod, two nuts, one on the top and

one on the bottom of the bracket along with a

split washer is suggested.

2. Secure the heater to mounting bracket, using

the 1/4-20 x 3/4” machine screws and lock-

washers provided.

3. Position the heater, aligning the bracket holes

with the cabinet holes and secure bracket

to the cabinet with the 1/4-20 x 1/2” machine

screws and nuts that are provided. With the

mounting bracket in the vertical position the

1/4” nuts are not necessary, weld nuts are

supplied in the cabinet.

RED

BLACK

RED

BLACK

AWG AMPS

USE COPPER

CONDUCTORS

ONLY

14 12

12 16

10 24

8 36

CAUTION: USE SUPPLY WIRES SUITABLE FOR

AT LEAST 90°C (194°F)

ATTENTION: UTILISEZ DES FILS

D'APPROVISIONNEMENT APRÈS AU MOINS 90 ° C

(194 ° F)

USE WITH MODEL NUMBER

BH-P-961-U5000V-T L2L1

LTB

240/208V 1ph

USE COPPER CONDUCTORS ONLY

CONTROL CIRCUIT WIRING MUST BE

NEC CLASS 1 RATED 600V

VOLTS

240/208

WATTAGE ADJUSTMENT TABLE

ADJUSTMENT

NONE REQUIRED

BLUE JUMPER TO TERMINAL 'C'

BLUE AND YELLOW TO TERMINAL 'C'

BLUE,YELLOW AND RED TO TERMINAL 'C'

5000/3750

4167/3120

3333/2500

2500/1875

WATTS

ELEMENT

THERMOSTAT

CONTROL

LIMIT

FAN DELAYM

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Fig. 2

POWER CONNECTION

To avoid possible electrical shock, be sure the electrical current is turned off at the main switch

prior to wiring or servicing of unit.

Remove the access panel, by removing four screws, two on the front and two on the back

2. Remove desired knockout on side or back of the heater.

Following the correct unit wiring diagram, connect the power supply and electrical ground to the

correct terminals using accepted practices recognized by local codes. See Table 1 for minimum

circuit requirements.

Replace the access panel, tighten the screws to ensure a good seal to help prevent dust and dirt

from entering the control compartment.

24"

MINIMUM

DISTANCE

FROM

FRONT

TO ANY

OBJECT

MINIMUM INSTALLATION CLEARANCES:

SIDES, TOP AND BOTTOM 0 INCHES

REAR: 8 INCHES (203mm)

FRONT: 24 INCHES (610mm)

Dégagements minimums MONTAGE:

Côtés, le haut et le bas 0 pouces

ARRIÈRE: 8 pouces (203mm)

AVANT: 24 pouces (610mm)

14.4

14.6

5.1

8.0"

MIN. TO WALL

10.0

FLOOR

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Note: Supply wire must be 90°C AWG minimum.

OPERATION

1. Restore power to the unit.

2. Turn the thermostat up to energize the unit. When the area reaches the desired temperature, rotate

the thermostat knob counter- clockwise slowly until the heat turns off.

3. This 961 series is provided with a fan delay/purge. When the heater is turned on, the

ele

ments willheat up before the fan comes on (approx. 30 seconds). This allows for warm

air circulation. When the thermostat is satised, the elements will de-energize and the fan

will continue to run (approx. 30 seconds) allowing residual heat to be purged from the heater.

4. The 961 abnormal situation such as fan failure or other over-temp. situations the limit control will

cycle the heater off. In the event of an over-temp situation, the heater should be inspected to

determine the cause and repaired by authorized personnel.

GENERAL SAFETY INFORMATION:

CAUTION:

Follow all local electrical and safety codes, as well as the National Electric Code (NEC) and the

Occupational Safety and Health Act (OSHA).

To avoid possible electrical shock, be sure the electrical current is turned off at the main switch prior to

wiring or servicing of unit.

If the power disconnect is not integral and is out-of-sight, lock it in the open position and tag to prevent

unexpected application of power prior to performing any service of maintenance on the unit.

The unit when installed must be electrically grounded in accordance with the National Electrical Code

and standard industry practice.

Make certain that the power source conforms to the requirements of your equipment. See Table 1 for

information as to wire and circuit size.

Check heater voltage and phase on rating label to conrm it is the same as the electric service supply.

Wiring diagrams of the heaters and supply connections are permanently attached to the heater

access door. All terminals are coded in accordance with the wiring diagram.

The wall/ceiling mounting structure and anchoring provisions must be of sufcient strength to support

the combined weight of the heater and mounting bracket.

TECHNICAL DATA TABLE 1

MODEL VOLTS WATTS PHASE AMPS SUPPLY WIRE

BH-P-961-U5000V-T 240/208 5000/3750 1 20.83 / 18 10

BH-P-961-U5000K-T 240/208 5000/3750 3 12.04 / 10.4 12

BH-P-961-U5000U-T 480 5000 3 6.1 14

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MAINTENANCE:

Caution: Make certain that the power source is disconnected before attempting to service or disassemble

any component. If the power disconnect is out of the line of sight, lock it in the OPEN position and tag to

prevent the application of power.

Electrical:

Once a year inspect the control panel wiring to make certain insulation is intact and all connections both

factory and eld are tight. Inspect all heater and relay contacts. If the contacts appear badly pitted or

burned, replace the contactor/relay.

Cleaning:

Clean the unit casing, fan and motor once a year. A dirty motor will tend to run hot and eventually will

be damaged internally. Any rust spots on the casing should be cleaned and repainted. The element

can be cleaned by removing the outer cabinet. Do not use any liquid to clean electric components.

Lubrication:

All units have fan motors that are permanently lubricated. No oiling is required.

425 Hanley Industrial Court St. Louis, Missouri 63144

1-888-731-7010

www.braschmfg.com [email protected]

WIRING DIAGRAMS

BH-P-961-U5000K-T BH-P-961-U5000U-T

L3L2L1

LTB

CONTACTOR

COIL

CTB

LIMIT CONTROL

DELAY

FAN

CONTROL TRANSFORMER

ELEMENT

T-STAT

240V 3ph

AWGA MPS

USE COPPER

CONDUCTORS

ONLY

14 12

12 16

10 24

83 6

CAUTION: USE SUPPLY WIRES SUITABLE FOR

AT LEAST 90°C (194°F)

ATTENTION: UTILISEZ DES FILS

D'APPROVISIONNEMENT APRÈS AU MOINS 90 ° C

(194 ° F)

LTB

CAUTION: USE SUPPLY WIRES SUITABLE FOR

AT LEAST 90°C (194°F)

ATTENTION: UTILISEZ DES FILS

D'APPROVISIONNEMENT APRÈS AU MOINS 90 ° C

(194 ° F)

368

2410

1612

1214 USE COPPER

CONDUCTORS

ONLY

AMPSAWG

480V 3

CONTACTOR

COIL

CTB

FAN

DELAY

LIMIT CONTROL

CONTROL TRANSFORMER

L3L2L1

ELEMENT

THERMOSTA

Ce manuel convient aux modèles suivants

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