Electrical, Chilled Water Systems | Bradford-White Corp BJVT, BJVS

Page 16	BRADFORD WHITE CORP.

5.4 Chilled Water Systems

If the boiler is installed in conjunction with refrigeration systems, it shall be installed so that the chilled medium is piped in parallel with the heating boiler with appropriate valves to prevent the chilled medium from entering the heating boiler.

When boiler piping is connected to heating coils, which are in close proximity to refrigerated air circulation, there must be flow control valves or other automatic methods to prevent gravity circulation of the boiler water during the cooling cycle.

5.5 Oxygen Permeable Systems

The BJV boiler must not be direct connected to a heating system utilizing oxygen permeable tubing. Provide a water-to-water heat exchanger between systems to prevent corrosion of ferrous metals such as the boiler’s piping wet walls, etc. Air elimination devices are not sufficient protection, and corrosion damage is not covered under the limited warranty.

5.6 Anti-Freeze

Non-toxic heating system anti-freeze may be added to the hydronic system provided the concentration does not exceed 50%, and the anti- freeze contains an anti foamant. Follow the anti-freeze manufacturer’s recommendations for yearly or biannual replacement of system anti-freeze.

SECTION 6.

Electrical

WARNING

ELECTRICAL SHOCK HAZARD. This boiler contains wiring that carries high voltage. Contact with these wires may result in severe injury or death.

AVERTISSEMENT

POSSIBILITÉ DE CHOCS ÉLECTRIQUES. Ce système de chauffage contient du filage de haut voltage. Un contact avec ces fils peut résulter en des blessures sérieuses ou la mort.

Caution

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

Attention

Au moment de l’entretien des commandes, étiquetez tous les fils avant de les débrancher. Des erreurs de câblage peuvent entraîner un fonctionnement inadéquat et dangereux.

6.1 General Information

Wiring connections must be made exactly as shown in the wiring diagram found on the inside of the control box cover (see Figure 8). The boiler must include a definite means of grounding. There is a bonding lug, where a bond wire must be attached.

Transformer BLK Pump Relay

			Power
GRN - Ground			Supply
BLK - Hot			115V AC
WHT - Neutral			60 Hz
			To Pump
WHT - Neutral
BRN - Hot			115V AC
On = Call			3/4 H.P.
for heat			Max

115V Field Wiring

115V Factory Wiring

BRN WHT

Figure 8. Field Wiring Connections.

6.2 Main Power

Electrical wiring must be in accordance with the latest edition of the National Electric Code (NEC), ANSI/National Fire Protection Association (NFPA) 70, unless local code requirements indicate otherwise.

The heater comes factory-wired intended for use with 115 Volt, 60 Hz AC field electrical supply.

Making electrical connections must be done by a certified electrician only, as with all wiring. Be sure that the power source to the heater is turned off or disconnected before servicing.

To wire the Brute Mini boiler to a 115V / 60 Hertz (Hz) electrical source:

1.Remove the two screws attaching the front cover of the control box.

2.There are four wires coiled in the area on the right side of the control box, supplied with wire nuts: 2 black wires twisted together, a white wire and a brown wire (see Figure 8).

3.Follow the schematics in Figure 9. Remove the wire nut from the two black wires, and connect the hot lead from a 115V power supply to both wires. Secure the three wires with the wire nut. The white, neutral wire should be joined to the other neutral lead coming from the 115V power supply, and the neutral lead coming from the pump. The brown wire attaches to the hot side of the pump.

NOTE: No external junction box is required.

4.Attach the leads from the wall thermostat to the R and W terminals on the terminal strip, located on the left side of the control box.