Macurco DMK-1 Installation And Operation Instructions

MACURCO GAS DETECTORS

GENERAL INFORMATION

The DMK-1 is a duct mount enclosure that provides the means to duct mount all of Macurco's
standard 4 x 4 mount gas detectors. By duct mounting a gas detector, the unit is able to monitor gas
concentrations in ventilation ducts.
THE FOLLOWING PARTS ARE INCLUDED WITH THE DMK-1:
Enclosure with cover and gasket
EMT Setscrew Adapter
¼" X ≈ 6" Exhaust Tube
¼" X 1.1" hex aluminum spacers
Machine Screws 4/40 x ½" phillips flat head
Machine Screws 4/40 x 3/8" phillips pan head
Strain relief / seal for wiring exit hole
Nut for strain relief
Sheet metal mounting screws #6 X 1"
Adhesive foam compression seal
A full size drill template
1/2" sampling tube (outer diameter) not provided

INSTALLATION

1. Open the enclosure by removing the 4 black integrated cover screws.
2. Install the setscrew adapters into the 2 (entrance and exit) holes drilled into the back of the enclosure
so that the setscrew side of the adapter is on the outside of the enclosure.
3. Decide which hole will be used for sampling and which will be used for exhaust. The sampling tube
(not provided) should be on the "upstream" side of the enclosure, as it is to be mounted on the duct
("upstream" refers to the flow of air in the duct * see reference diagram below*).
4. Install the exhaust tube into one of the setscrew adapters so that the squared end is mated to the
setscrew adapter and the pointed end is toward the duct. The tube should be turned so that the longer
pointed side is facing the direction of "upstream" air flow.
5. Install the sampling tube (not provided) into the other setscrew adapter according to the sampling tube
manufacturer's instructions.
6. Install the detector onto the top of the 4 hex aluminum spacers. Secure it in place using the 4 pan head
machine screws. Run the wiring through the strain relief. Twist the outer cap of the strain relief
clockwise to compress the gasket material around the wiring.
7. Mark and drill the 2 large (1 ½") and 4 small (3/32) holes in the duct you want to mount the unit on,
using the template provided. The two large holes are for the sampling and exhaust tubes. The four
small holes are starter holes for the sheet metal mounting screws. Ensure that the sampling and exhaust
tube holes are large enough to allow the setscrew adapters to fit.
DMK-1
INSTALLATION
AND OPERATION INSTRUCTIONS
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Rev: 2/06