Bacharach 3015-4286 - Manual (Page 32)

Single Zone Gas Monitor
P/N: 3015-4256 Rev 13 28
SECTION 4. MAINTENANCE
4.1. Warnings and Cautions
WARNING: Shock Hazard! Always disconnect AC power before working inside the
monitor.
WARNING: Before performing any operation or maintenance, verify connection of the AC
power ground wire to the monitor’s ground stud. Under no circumstances should this
monitor be operated or serviced without a protective ground. Doing so poses a potential
shock hazard and is also a violation of electrical safety standards applicable to this type of
equipment.
WARNING: Electrical installation should be performed by a certified electrician and must
comply with all applicable NEC/CEC and local electrical safety codes.
CAUTION: When working inside the monitor, be very careful not to dislodge any electrical
wiring or pneumatic tubing. The SZ monitor contains sensitive electronic components that
can be easily damaged. Be careful not to touch or disturb any of these components.
4.2. Charcoal Filter (Halogen Gas Monitor Only)
During normal operation, the Single Zone monitor performs a purge cycle during
which fresh air is drawn in from the purge line to flush internal components of any
residual refrigerants. Purge lines should draw in fresh outside air to perform the
purge function. When access to outdoor air is impractical, purge lines may begin
indoors, however a charcoal filter must be used on the purge line to ensure that no
contaminated air is drawn into the system during purge cycles. The charcoal filter
(which is mounted outside of the enclosure using the included bracket) removes
refrigerant gas from the purge-air stream during the internal purging process.
External Filter Includes
Mounting Bracket
Use upgrade kit 3015-5716 to convert an SZ with internally mounted filter to an SZ with an external filter.
Replace the charcoal filter (P/N 3015-3125) about every 6 months, when a zero filter fault occurs (fault
code <0100>), or after the monitor itself has been exposed to unusually high levels of refrigerant gas,
such as after an evacuation alarm.
4.3. Hydrophobic Filters
Hydrophobic Filters (see Figure 2-5 on page 11 and Figure 2-6 on page 12) located in both the gas-
sample and purge lines prevent water from entering the IR detector. A zone flow fault will occur (fault
code <0800>) if the gas-sample filter becomes blocked, while a purge flow fault will occur (fault code
<1000>) if the purge filter becomes blocked. Replace the appropriate filter as required (P/N 0007-1650).
4.4. Servicing Air Lines and Termination Filters
The gas-sample line and the optional purge and exhaust lines should be periodically checked for obvious
signs of kinks, damage, and contamination. Replace the tubing as required.
The gas-sample line and purge-line termination filters prevent dust and dirt from entering the monitor.
Both of these filters should be periodically checked and replaced when there are obvious signs of
contamination. A zone flow fault will occur (fault code <0800>) if the gas-sample line filter becomes
blocked, while a purge flow fault will occur (fault code <1000>) if the purge-line filter becomes blocked. To
service the filter, simply remove it from the line and replace it with a new one (P/N 3015-3420).