Burnham BV, BH manual Unit Heater Mounting Height, Wiring Instructions

Vertical Delivery Units, Model BV Series

Models BV-42 through BV-161 have 4 tapped holes (1/2”-13) on the top surface for unit suspension. Suspension can be made with threaded rods, pipes, or ceiling hanger brackets. Models BV-193 through BV-610 have angle-iron frame mounting brackets for heavy-duty installation with applicable hardware.

No Deflector

Two-Way Louver

4-Cone Anemostat

Truncone

Figure 2: Vertical Air Delivery

C.UNIT HEATER MOUNTING HEIGHT

Do not install unit above recommended maximum mounting heights or below the minimum height of eight feet. The height at which unit heaters are installed is critical. Maximum mounting heights for all units are listed in Table 1. Maximum mounting heights for Model BV is given for units with or without air diffusion

accessories. Locate horizontal delivery unit heaters so air streams of individual units wipe the exposed walls of the building with either parallel or angular flow without blowing directly against the walls. Heaters should be spaced so the air stream from one supports the air stream from another heater. Locate vertical delivery unit heaters in the center area of the space to be heated, using horizontal delivery unit heaters along the walls where heat loss is usually greatest.

D.PIPING INSTALLATION Horizontal and Vertical Unit Heaters

Note: Only make piping connections using two (2) pipe wrenches. One wrench is used as a “back-up” while the other wrench is used for applying force necessary to tighten the fitting.

The illustrations, on page 6, suggest four (4) different piping configurations. Refer to the ASHRAE Guide & Specialty Manufacturer for selection of filter, piping traps and other specialty sizing. Piping is typical for unit heaters.

E.WIRING INSTRUCTIONS

1.Disconnect power supply before making wiring connections to prevent electrical shock and equipment damage. All units must be wired strictly in accordance with wiring diagram (Figure 3).

2.All wiring must be done in accordance with the National Electric Code and applicable local codes. In Canada, wiring must conform to the Canadian Electric Code. It is recommended that all wiring be adequately grounded.

3.Electric wiring must be sized to carry the full load amp draw of the motor, starter, and any controls that are used with the unit heater. Overcurrent protectors should be sized based on motor current rating shown on the unit serial plate, and applicable national electric code procedures.

4.All units should be installed with an electrical junction box. Junction boxes are either integral to the motor or to be attached to the unit casing. Units with explosion-proof motors have an explosion- proof junction box attached to the motor. Any damage to or failure of Burnham Hydronics heater units caused by incorrect wiring of the units is not covered by Burnham Hydronics standard warranty.

5