Bacharach HGM-MZ Quick Start Guide

HGM-MZ

Instruction: 3015-9003
Rev: 1
Date: November 2014

1. VISUAL INSPECTION: Upon opening the box visually inspect exterior of monitor for damage and unpack the

provided Charcoal filter and line end filters.

Quick Start Installation Instructions

Refrigerant Monitor

Figure 1. Refrigerant Leak Monitor Outside View

2. PLACEMENT OF MOUNTING HOLES: Using the supplied template, mark mounting hole locations. Then

drill holes in the wall for installing the monitor to the wall. DO NOT DRILL THROUGH THE MONITOR
will void the warranty.

3. ATTACH TO WALL: Fasten the monitor to the wall securely with appropriate fasteners.

4. REMOVE SHIPPING TIES: Cut the zip ties off the pump inside the monitor. They are only used for shipping

and will cause noise and vibration if left in place.

5. INTERNAL WIRING: With main power off make all internal wiring terminations and connections.

6. RUN SAMPLE TUBING: Locate the positions of remote air sample points and run air sample tubing back to

the monitor making note of the length of the tubing and the sample point location. NOTE: It is a good idea
to make a list of the sample point locations and leave it with the monitor for future reference.

7. PICKUP PLACEMENT AND PROTECTION: Sample point placement is critical for detecting leaks. They

should be located with respect to air currents and proximity to the most likely leak locations.

a. Mount pickup line end filters 6 to 12 inches off the floor for refrigerants.
b. CO

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installations should be mounted 4 to 6 feet off the floor.

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as this

HGM-MZ Refrigerant Monitor Quick Start Installation Instructions

c. If you are placing pickups in a freezer, mount them well away from the door to prevent sensor

freeze up from high humidity near the freezer door. An alternative location is just outside the door
which would pick up refrigerant when the door is opened.

NOTE: Use the worksheet supplied with the monitor to document location and lengths of tubing for later
zone setup information.
Protect tubing in high traffic areas using conduit and junction boxes. In wet or potential wash down
locations you should use the wet location filter kit p/n 3015-5748. (See end of line Best Practices Below).

Figure 2. Best Practices: End of

Line Filter for Dry Locations

Figure 3. Best Practices: End of Line Filter for Wet Locations

(Splash Guard Accessory Part Number 3015-5748)

8. CONNECT TUBING: Connect tubing to the monitor using best practices for cutting and coupling air sample

tubing (see figures 4 and 5). PTC (push-to-connect) connectors are highly recommended for tubing
connections. In addition, ensure that all tubing cuts are “squared” (perpendicular to the tubing) to avoid
sharp angles that could damage O-rings.

Figure 4. Tubing Connections (Best through Worst) Figure 5. Best Practices: Tubing Cuts

9. MOUNT THE PURGE FILTER: Mount the charcoal purge filter using the supplied bracket. Be sure to mount
the filter near the monitor so that it is accessible when filter replacement is required.

10. CONNECT FILTER’S “FLOW OUT” SIDE: Use appropriate tubing to connect the “OUT” side of the charcoal
filter to the “PURGE port” on the monitor.

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HGM-MZ Refrigerant Monitor Quick Start Installation Instructions

11. CONNECT FILTER’S “FLOW IN” SIDE: Run tubing from the “IN side” of the charcoal filter to a location that is
outside of the structure (machinery room). Locate it in an area where the line end filter (a) can be easily
accessed for replacement, and (b) where it will remain dry and free from direct rain or excessive moisture.
This is the optimum installation scenario. See Figure 6.
If this cannot be accomplished, the end of line filter can be mounted inside (near the monitor and charcoal
filter) in an accessible area to allow easy replacement. NOTE: In the case of indoor filter installation, the
monitor must be put in service mode when refrigerant is released (e.g., during maintenance) to prevent
premature purge filter contamination. See Figure 7.

Figure 6. Outdoor Filter Mounting Example (Optimum) Figure 7. Indoor Filter Mounting Example

NOTE:

a. If you are mounting the purge pickup outside the structure, you must place the tubing in an area

away from the elements in a “secure area that is out of the reach of rain and snow” and is
accessible for filter changes.

b. In the case of the CO

monitor, you must mount the pickup away from CO

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sources (i.e., gas-fired

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appliance stacks, rack room, store ventilation, truck bays, etc.) which can skew the purge baseline.

c. If mounting a purge pick up inside the structure, you must not have prolonged background ambient

refrigerant contamination as this will cause the charcoal purge filter to fail prematurely (refer to
fault code 0100).

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