INSTALLATION INSTRUCTIONS
CAUTION: Gasoline is heavier than air. Mount the Sensor Block below the engine starter
height.
1. After referring to the “Where to Install the Panel and Sensor” and Where NOT TO Install the
Panel and Sensor Block” select an area at the helm with at least 3” (76.2 mm) of clearance
for the housing. Drill a 2 1/8” (53.975 mm) mounting hole and install the housing using the
hardware supplied. DO NOT CONNECT POWER UNTIL THE INSTALLATION IS
COMPLETE.
2. Connect one end of the 20-foot (6096 mm) cable assembly to the control panel and run the
cable to the engine compartment location of the sensor block.
3. Mount the sensor block below starter height on the forward bulkhead wall with the cable
down toward the bilge.
Do not mount the sensor block where it can get wet or submerged
in water. Do not mount with the cable entering from the top as water can run into the
sensor block and damage the sensor block.
Connect the 20-foot (6096 mm) cable.
4. Use a 1 amp in-line fuse and connect the RED power lead to the 12 vDC battery positive (+).
Connect the BLACK lead to the battery ground (-).
OPERATION
The MGD-1 and MGD-1XL units have supervisory circuits to warn of various sensor block
malfunctions and a disconnected or broken cable connector.
1. Press the ON pad on the control panel. The WAIT (YELLOW) light will turn on. In about
two minutes the WAIT (YELLOW) light will turn off and the ON (GREEN) light will turn
on. The detector is now operational and monitoring for gasoline fumes/vapors. During the
two-minute warm-up time you may press the TEST/MUTE pad to check the alarm sounder
and the WARNING (RED) light, as described in the TESTING section below.
2.
When the sensor detects gasoline vapor above the alarm threshold, the sounder will beep and
the WARNING (RED) light will blink. The alarm will continue until the air in the monitored
area has cleared.
3.
Press the TEST/MUTE pad will mute the alarm sounder for 5 minutes. The WARNING
(RED) light will continue to blink. After about 5 minutes, if the air in the monitored area has
not cleared, the alarm sounder will resume beeping.
NEVER ENTER THE ENGINE COMPARTMENT WITH AN OPEN FLAME OR LIT
SMOKING MATERIALS. OPEN FLAMES AND SMOKING MATERIALS CAN
CAUSE AN EXPLOSION AND OR FIRE.
TESTING
!
WARNING
TEST THIS ALARM’S OPERATION AFTER THE BOAT HAS BEEN IN STORAGE,
BEFORE EACH TRIP, AND AT LEAST ONCE PER WEEK DURING USE.
1. With the unit on, press and hold the TEST/MUTE pad. Verify that the WARNING (RED)
light blinks and the alarm sounder beeps. Release the TEST/MUTE pad. A brief press of the
TEST/MUTE pad will run the test for 3 seconds. If the WARNING (RED) light does not
blink and/or the alarm sounder does not beep, the unit is defective and must be replaced. This
test step verifies a good connection between the control panel and the sensor block.
2.
When the ON (GREEN) operation light is lit, the sensor block can be tested with
hydrocarbon vapor.
!
WARNING
USE ONLY A BUTANE LIGHTER TO PERFORM THIS TEST.
NEVER USE GASOLINE SOAKED MATERIAL.
3. SENSOR BLOCK TEST: Direct the butane lighter towards the sensor block and depress the
lever to release butane (only) into the sensor block. The alarm should sound and the
WARNING (RED) light on the control panel should blink. It will take 8 to 10 seconds for the
unit to respond. DO NOT hold the lever on the butane lighter for more than 15 seconds.
4. SUPERVISORY CIRCUIT TEST: Disconnect one end of the 20-foot (6096 mm) connector
cable. The alarm should beep every 30 seconds and the WARNING (RED) and ON
(GREEN) lights on the control panel will blink alternately to indicate a malfunction.
IF THE UNIT DID NOT TEST PROPERLY REFER TO THE
TROUBLE SHOOTING GUIDE
MAINTENANCE
1.
Keep the sensor block free of dust and debris.
2.
Remove or cover the sensor block whenever the bilge compartment or engine compartment
equipment is being cleaned, painted, power washed etc. Direct contact with chemicals, WD-
40, water, oil, etc. can cause permanent damage to the sensor.
