Honeywell HPM User Manual

6 Removal and Replacement
6.13 48 V Backup Battery Replacement
426 HPM High-Performance Process Manager Service R688
Honeywell December 2020
Alkaline batteries
The alkaline batteries that are installed in the AC Only Power System are not rechargeable and, therefore,
must be replaced more often. A six month replacement cycle is suggested, unless an equipment power
failure has occurred for a prolonged period. Then, the batteries should be replaced.
Replacement procedure
To replace the NICad batteries, use the procedure in the following table.
Step
Action
1
Remove the old batteries from the battery holder and replace them with fresh ones. It is
not necessary to remove power from the batteries while they are being replaced.
2
Observe and match the polarity marked on the case of each battery and the holder.
After all the batteries are in place, rotate each one slightly with your finger to assure it
makes good contact with the holder.
6.13 48 V Backup Battery Replacement
Battery operational and service life
The lead acid batteries provide 20 minutes of standby power for the HPM Power System and have a
normal stand-by service life of 4 to 5 years. However, usage and high environmental temperatures will
reduce the service life. For this reason, environmental temperature, battery storage time, and battery
usage should be monitored and recorded. In the absence of this attention, it is recommended the battery
performance be checked on a yearly basis, or be replaced every 3 years to insure proper performance.
Battery performance
All batteries of the same capacity, rating, and specifications, do not provide equivalent performance or
reliability. For optimum system backup realization, use only Honeywell recommended and approved
batteries.
48 V Battery Pack end-of-life
The battery end-of-life is defined as the time when the battery capacity, meaning its ability to accept and
hold a charge, has decayed to 60% of the original capacity. There are several factors that determine
useful service life. The standby service life is reduced by events other than a continual 20 degrees C
standby condition and is defined as follows.
 Standby (float) service life means that the batteries are connected to a charger and only
occasionally discharged. Honeywell 48-volt batteries are designed to operate in standby (float)
service for 4 to 5 years at 20 degrees C. The service life of a battery can be shortened by an
improper charging voltage. The charging voltage from the Power Supplies should be checked every
6 months for the proper voltage level. See subsection “Power Supply Module Replacement”
(“Removal and Replacement” section) for the recommended procedure.
 As shipped from Honeywell, the batteries are fully charged. However, if a system is stored in a
nonpowered state, the batteries will self-discharge and can become unusable. The time required for
this to happen is a function of storage temperature.
0 degrees to 20 degrees C
12 months
21 degrees to 30 degreesC
9 months
31 degrees to 40 degreesC
5 months
41 degrees to 50 degreesC
2.5 months

Honeywell HPM Specifications

General

Brand	Honeywell
Model	HPM
Category	Network Hardware
Language	English