Replacement

D2071A Operations & Installation Guide 2.0 Installation

Set the 12 V Mode to YES. Refer to Section 2.7.1 Battery for battery installation instructions.

NFPA 72 applications require 110 VAC or 120 VAC, 60 Hz commercial power for the transformer to be unswitched and from a reliable source. NFPA 72 applications need a dedicated branch circuit to supply the 110 VAC or 120 VAC transformer power. Identify the method of disconnecting the circuit as a fire alarm control circuit. Only authorized personnel can disconnect the circuit.

Never share the transformer with other equipment. Foreign grounds on the AC input damage the D2071A power circuit.

2.6.224 VDC Mode

Connect a 24 VDC, uninterrupted, regulated, auxiliary output from an FACP to Terminals 1 and 2. Set the

12 V Mode to NO. Terminals 1 (+) and 2 (-) are polarity protected when the D2071A is programmed for the

24 VDC Mode.

Do not connect a 12 VDC standby battery and do not connect earth ground to the D2071A when it is in 24 VDC Mode.

The discharge and recharge schedule in Table 4 shows the voltages at Terminals 1 and 2 used to generate Battery Reports with the D2071A in 24 VDC Mode. If the voltage falls below 11.1 VDC, the D2071A does not operate.

Table 4: 24 VDC Battery Discharge and Recharge

Schedule

Discharge Cycle

27.6V FACP battery float voltage

21.8V Battery Trouble Report

11.1V (TROUBLE ZN 9) Disable

Recharge Cycle

AC on FACP battery recharging begins

24.7 V Battery Restoral Report (RESTORAL ZN 9)

27.6 V

FACP battery charged

Notes:

1.The source supervised is the 24 VDC input from the FACP.

2.This schedule applies to Terminals 1 and 2 on the D2071A.

3.The actual voltage can vary ±5%.

2.7Secondary Power Supply and Charging Circuit (12 VAC Mode Only)

Use Terminals 4 and 5 for secondary power supply and charging circuit connections.

2.7.1Battery

The D2071A’s charging circuit is only calibrated for lead-acid type batteries. Do not connect D2071A to a battery when it is using 24 VDC from an existing FACP. The battery supplies power to the system during interruptions in primary power (AC) while in 12 VAC Mode.

For NFPA 72 applications, use a 12 VDC, 2.3 Ah, sealed, lead-acid, rechargeable battery (Model D1219). You can also use a 12 VDC, 7 Ah, sealed, lead-acid, rechargeable battery (Model D126) that exceeds the standby requirements.

Installation

1.Install the battery in an upright position at the base of the metal enclosure.

2.Use the black lead to connect the negative side (black) to the D2071A Terminal 4.

3.Use the red lead to connect the positive side (red) to the D2071A Terminal 5.

Parallel Activation on Powerup: The Phone Line Trouble Buzzer, Phone Line Trouble Relay, and Phone Line Trouble LED briefly activate on AC or battery powerup to indicate the DACT is operational.

Under normal use, replace the battery every 3 to 5 years.

Do not install the transformer in a power source that is routinely switched off. This does not comply with NFPA standards and causes heavy battery discharges that can result in premature failure.

Supervision

During an AC power loss, the battery supplies all power to the D2071A and slowly discharges. When the battery voltage drops below 11.8 VDC, the D2071A sends a TROUBLE ZN 9 Report to the receiver.

After the AC is restored, the battery begins to charge. At 13.4 V, the D2071A sends a Battery Restoral Report (RESTORAL ZN 9).

1 4	Bosch 09/04 74-06200-000-F

D2071A specifications

The Bosch Appliances D2071A is an exemplary appliance that enhances everyday cooking and food storage with its premium features and stylish design. This model stands out in the Bosch lineup for its innovative technologies designed to provide optimal performance while ensuring user-friendly operation.

One of the main characteristics of the D2071A is its energy efficiency. Bosch has integrated advanced technologies that comply with the highest energy standards, which not only help reduce electricity bills but also promote environmental sustainability. The appliance operates with minimal energy consumption, making it a great choice for eco-conscious consumers.

The D2071A boasts a sleek and modern design that can seamlessly fit into any kitchen decor. With its stainless steel finish, it offers durability as well as an elegant appearance. The appliance is designed with a seamless integration feature, allowing it to blend in with cabinetry, giving a built-in look that is favored by many homeowners.

In terms of performance, the D2071A features advanced cooling technologies that ensure optimal temperature control and food preservation. With a multi-air flow cooling system, cold air is distributed evenly throughout the fridge and freezer compartments, preventing hot spots that can compromise food quality. This technology ensures that perishables stay fresher for longer periods, minimizing waste.

Another notable feature is the adjustable shelving and storage options. The D2071A includes customizable shelving that can be rearranged to accommodate various food items and containers. This flexibility allows users to maximize storage space, making it easy to store everything from tall bottles to wide platters.

The appliance is equipped with intuitive controls and a user-friendly interface. This allows for easy temperature adjustments and access to various settings that enhance the user experience. Additionally, the D2071A comes with a notification system that alerts users in case of temperature fluctuations, helping to maintain food safety.

Overall, the Bosch Appliances D2071A combines modern design with cutting-edge technology, making it a top choice for individuals looking for a high-quality refrigerator. It successfully merges functionality, efficiency, and style, thus catering to the diverse needs of today’s home cooks and families.