This document provides the installation, operation, and maintenance manual for the BCM 1220 automatic battery charger. It includes installation requirements and precautions, as well as the working principle and adjustment methods for float and equalize charging.
This manual explains how to install the BCM 1220 charger in a dry, ventilated location, connect it to a 120 VAC or 240 VAC, 15 A grounded supply, and observe safety precautions such as avoiding explosive gases and ensuring correct polarity. It also lists environmental limits, including a maximum ambient temperature of 104 °F (40 °C).
The charger supports float and equalize (均充) charging modes that are selected with a dedicated switch or optional APB‑1210 alarm/control module. Detailed procedures for adjusting float and equalize voltages, setting current limits, and using the optional alarm functions are provided. This manual is written in Chinese.
| Input voltage | 120 VAC or 240 VAC, 50/60 Hz, 15 A |
|---|---|
| Maximum ambient temperature | 104 °F (40 °C) |
| Float voltage (12 V battery) | 12.8 VDC |
| Float voltage (24 V battery) | 25.6 VDC |
| Current limit setting | 100 % of name‑plate rating |
Connect the charger to a 120 VAC or 240 VAC, 50/60 Hz supply that can provide at least 15 A with grounding.
Use the “float/equalize” switch or the optional manual equalize regulator; the switch selects the desired mode.
Connect a precise voltmeter in parallel with the battery, set the charger to the float position, wait for the voltage to stabilize, then turn the fine potentiometer clockwise to increase voltage or counter‑clockwise to decrease it.
Ensure the correct polarity, disconnect any load before adjusting, keep sparks and flames away, and have only qualified personnel perform maintenance.