Hanwell Smart Receiver 2 (SR2)
Instruction Manual
hanwell.com
Page 17 of 22 IM6001 - 3
7 Maintenance
7.1 Uninterruptable Power Supply (UPS) Battery
The Lead Acid UPS Battery should be replaced every 2 years.
Hanwell Solutions recommends that the same make and model of battery should be used if
possible. If this is not possible, the battery float voltage should be adjusted to meet the battery
manufacturer’s recommended voltage.
To Adjust the Battery Float Voltage:
1. Fit the new battery and allow to charge for several hours.
2. Measure the voltage across the battery terminals.
3. Adjust variable resistor VR-1 (See Appendix 1 – SR2 Connection Data) until the
measured voltage meets the manufacturer’s recommended voltage.
7.2 Coin Cell Battery
The coin cell ensures uninterrupted power to the clock chip.
It should be changed every 5 years.
7.3 Fuse Specifications
Mains 1 Amp anti-surge 6.3mm x 25mm
F1 1 Amp anti-surge 20mm
F2 5 Amp anti surge 20mm
F5 1 Amp anti-surge 20mm
F Internal 2 Amp anti-surge 20mm
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