Bacharach HGM-SZ Installation & Operation Manual

Also see for AGM-SZ: Product catalog Installation & operating instructions

Bacharach HGM-SZ Installation & Operation Manual Manual pdf 32 page image

Single Zone Gas MonitorP/N: 3015-4256 Rev 13 28SECTION 4. MAINTENANCE4.1. Warnings and CautionsWARNING: Shock Hazard! Always disconnect AC power before working inside themonitor.WARNING: Before performing any operation or maintenance, verify connection of the ACpower ground wire to the monitor’s ground stud. Under no circumstances should thismonitor be operated or serviced without a protective ground. Doing so poses a potentialshock hazard and is also a violation of electrical safety standards applicable to this type ofequipment.WARNING: Electrical installation should be performed by a certified electrician and mustcomply with all applicable NEC/CEC and local electrical safety codes.CAUTION: When working inside the monitor, be very careful not to dislodge any electricalwiring or pneumatic tubing. The SZ monitor contains sensitive electronic components thatcan 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 duringwhich fresh air is drawn in from the purge line to flush internal components of anyresidual refrigerants. Purge lines should draw in fresh outside air to perform thepurge function. When access to outdoor air is impractical, purge lines may beginindoors, however a charcoal filter must be used on the purge line to ensure that nocontaminated air is drawn into the system during purge cycles. The charcoal filter(which is mounted outside of the enclosure using the included bracket) removesrefrigerant gas from the purge-air stream during the internal purging process.External Filter IncludesMounting BracketUse 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 (faultcode <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 FiltersHydrophobic 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 (faultcode <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 FiltersThe gas-sample line and the optional purge and exhaust lines should be periodically checked for obvioussigns 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 ofcontamination. A zone flow fault will occur (fault code <0800>) if the gas-sample line filter becomesblocked, while a purge flow fault will occur (fault code <1000>) if the purge-line filter becomes blocked. Toservice the filter, simply remove it from the line and replace it with a new one (P/N 3015-3420).