SAFE-T-ALERT 70 Series

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RECREATIONAL VEHICLE (RV)

Combination Carbon Monoxide and Gas Alarm

USER’S MANUAL

70 Series Models: 70-742 and 70-742-R-Kit

ATTENTION: This user’s manual contains important Carbon

Monoxide (CO) and gas alarm installation, operation, troubleshooting

and warranty information. Read, follow, and keep this manual for

future reference.

NOTE: If you install or purchase this alarm for another person, give

this manual to that person.

IMPORTANT: This unit must be replaced within five years of its

production date. Record the manufacture date in the section,

Owner’s Replacement Record, in this manual for future use. The

replacement date indicates the date beyond which the device may no

longer detect carbon monoxide, propane or natural gas accurately.

The device should be replaced.

DUAL SENSOR TECHNOLOGY

The SAFE-T-ALERT™ 70 Series combination CO / Gas Alarm is an alarm that

combines into a single compact system, a powerful alarm that detects both

Carbon Monoxide (CO) and explosive gases Propane (LPG) and Methane

(Natural Gas). The 70 Series uses the latest microprocessor technology

combined with two electronic self-cleaning sensors that operate independently

of each other. The combined unit can detect both CO and explosive gases

simultaneously.

This detector is UL Listed as a CO Propane and Methane (Natural Gas)

detector for RV use. Other explosive gases detected, but not tested by UL,

include Acetone, Alcohol, Butane, and Gasoline all of which you may have

in your RV.

To prevent false alarms from brief “puffs” of gas the detector has a recheck

cycle before alarming. If high levels of gas remain during the recheck cycle,

the detector will alarm.

The electronic CO sensor in your SAFE-T-ALERT

CO alarm is

very sensitive to CO gas. It will not react to most other gases.

WHY EVERY RV NEEDS A 70 SERIES CO AND GAS ALARM

Everyone is at risk for carbon monoxide poisoning! Particularly sensitive are

children, pregnant women, the elderly and people with lung or heart disease or

anemia! Carbon monoxide (CO) is an odorless, colorless gas that prevents the

blood from carrying oxygen to vital organs. CO is 200 times more likely to

replace oxygen in the blood. The Consumer Product Safety Commission

(CPSC) recommends using at least one CO alarm located outside of

sleeping areas. For the extra security, locate additional CO alarms in each

sleeping area. Safe-T-Alert CO alarms are available for secondary

installations.

Propane gas can cause explosions! Using propane requires taking safety

precautions to avoid injury. These gases are usually identified by an unpleasant

odor. Certain conditions may make some people unable to detect this unpleasant

odor. These conditions include advanced age, colds, allergies, and the use of

tobacco, alcohol or drugs that may diminish the sense of smell.

ABOUT THIS ALARM

Because CO is a colorless, odorless, tasteless and highly poisonous gas; it

can endanger lives even at low levels of concentration. The CO Alarm

will alert you to potentially dangerous situations. The following

symptoms may be related to CO POISONING. Discuss these

symptoms with ALL household members and RV guests:

• Mild Exposure: Headaches, running nose, sore or watery eyes, often

described as “flu-like” symptoms.

• Medium Exposure: Dizziness, drowsiness, vomiting.

• Extreme Exposure: Unconsciousness, brain damage and death.

NOTE: Reported cases of CO gas poisoning indicate that while

victims are aware they are not well, they are disoriented. They are unable

to save themselves by exiting the RV or calling for

assistance. Small children and pets may be affected first.

Your SAFE-T-ALERT

70 Series alarm helps protect your household

members and guests from CO produced while using your RV. CO gas is

produced when any type of fuel is incompletely burned. Potential sources

of CO in and around your RV can include gas or diesel engine exhaust,

portable space heaters, gas stoves and ovens, furnaces, defective engine

exhaust systems, portable grills, other nearby RVs, portable generators,

generator exhaust, and other propane-powered appliances. All are sources

of CO.

The following are also sources of CO that may affect your RV:

• Extended operation of unvented fuel burning appliances can build up

high CO levels.

• An idling vehicle in an open or closed garage.

• Temperature inversions can trap exhaust near the ground.

• CO build up can be caused by reverse/negative venting of fuel burning

appliances including; 1) Clogged, loose or faulty stacks or chimneys of

(clothes dryers, furnaces and water heaters, etc.), 2) wind direction

and/or velocity, 3) simultaneous operation of multiple fuel burning

appliances, and/or exhaust fans.

WARNING:

LIMITATIONS OF CO and GAS ALARMS

THIS ALARM WILL NOT WORK WITHOUT POWER. Some

reasons for no alarm power; are a blown or missing fuse, broken wire, a

faulty wire connection or circuit breaker, a discharged battery, cut lead

wires, or improper supply (+) or ground (-) connections.

THIS ALARM WILL ONLY INDICATE THE PRESENCE OF GAS

AT THE SENSOR. CO or explosive propane/natural gas gases may be

present in other areas. MTI recommends installing CO alarms in all sleeping

areas. Do not block or cover the alarm with any object that can

prevent a gas leak or carbon monoxide from reaching the sensor.

THIS ALARM IS INTENDED FOR USE IN RV's. It is intended for

use inside the RV. It is not designed to measure compliance with

commercial and industrial standards.

THIS ALARM MAY NOT BE HEARD. The alarm’s loudness is

designed to meet or exceed regulatory standards; however, the alarm may

not be heard if alarms are located in remote locations or behind closed

doors. Persons who are hard-of-hearing, have consumed alcoholic

beverages, taken prescription, non-prescription or illegal drugs, may not

hear the alarm.

THIS ALARM IS DESIGNED TO DETECT CARBON MONOXIDE

AND PROPANE GAS. THE ALARM IS NOT DESIGNED TO

DETECT SMOKE, OR FIRE.

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Summary

About This Alarm

CO Poisoning Symptoms and Risks

Details mild, medium, and extreme CO poisoning symptoms and lists potential CO sources in RVs.

Alarm Limitations and Warnings

Covers critical limitations, including power dependency, sensor specificity, and intended use.

Protecting Your Family and Installation

Family Protection Strategies

Provides advice on proper installation, visual inspections, and maintenance for family safety.

Installation Location Guidelines

Specifies recommended and prohibited locations for installing the RV alarm.

Installation Requirements

Details power supply, wiring, fusing, and electrical code compliance for installation.

Alarm Operation and Testing

Specific Model Installation

Provides step-by-step installation instructions for Model 70-742 and 70-742-R Kit.

Wiring and Testing Procedures

Includes special wiring notices, test procedure warnings, and CO/gas sensor testing methods.

Alarm Operation Modes

Explains the warm-up period and how the alarm prioritizes simultaneous CO and gas alarms.

Alarm Signals, Troubleshooting, and Care

Visual and Audible Alarm Signals

Describes the different visual LED indicators and audible signals for CO, propane, and malfunction.

Memory Feature and Troubleshooting

Explains the Peak Level Memory and provides a troubleshooting guide for common issues.

Alarm Maintenance and Care

Details how to maintain the alarm, including testing, vacuuming, and cleaning the cover.

Emergency Procedures, Specifications, and Warranty

Emergency Procedures During Alarm

Provides step-by-step procedures for responding to gas or CO alarms in the USA and Canada.

End of Life Signal and Specifications

Explains the end-of-life signal and lists the technical specifications of the alarm unit.

Product Warranty Details

Outlines the limited product warranty, its coverage, and limitations.

Product Not Warranted and Returns

Non-Warranted Conditions

Lists conditions under which the product warranty is voided, such as user service or faulty installation.

Return Procedures

Provides instructions for troubleshooting, contacting customer service, and returning the product.

Owners Replacement Record

Instructions for recording production and replacement dates for the alarm unit.

The SAFE-T-ALERT™ 70 Series is a combination Carbon Monoxide (CO) and Gas Alarm designed for recreational vehicles (RVs). This device integrates a powerful alarm system into a single compact unit, capable of detecting both Carbon Monoxide and explosive gases such as Propane (LPG) and Methane (Natural Gas) simultaneously. It utilizes the latest microprocessor technology combined with two independent, self-cleaning electronic sensors. The detector is UL Listed for RV use for CO, Propane, and Methane detection. It can also detect other explosive gases not tested by UL, including Acetone, Alcohol, Butane, and Gasoline, which may be present in an RV. To prevent false alarms from brief gas "puffs," the detector incorporates a recheck cycle before alarming.

Function Description:

The primary function of the SAFE-T-ALERT™ 70 Series alarm is to protect RV occupants from the dangers of carbon monoxide poisoning and propane gas explosions. CO is a colorless, odorless, tasteless, and highly poisonous gas produced by incomplete combustion of any fuel type. Sources in and around an RV can include gas or diesel engine exhaust, portable space heaters, gas stoves and ovens, furnaces, defective engine exhaust systems, portable grills, nearby RVs, portable generators, generator exhaust, and other propane-powered appliances. Propane gas, while often odorized, can lead to explosions if a leak goes undetected, especially if occupants have a diminished sense of smell due to age, colds, allergies, tobacco use, alcohol, or drugs.

The alarm provides both visual and audible signals for different conditions. A steady green LED indicates normal operation. In a CO alarm condition, the red CO LED flashes, and the alarm sounds 4 "BEEPS" followed by a 5-second silence, indicating CO levels over 70 ppm. In a propane gas alarm condition, the red LED flashes, and the alarm sounds a steady tone, indicating dangerous levels of propane or methane gas. If both CO and gas alarms are triggered simultaneously, the gas alarm takes higher priority, with the gas LED flashing red and the beeper sounding, while the CO LED remains solid red until CO is ventilated.

The alarm also features a "Memory Feature" that records the approximate peak level of CO that activated it, indicated by chirps and blinks of the CO LED: 1 chirp/green blink for clear memory, 2 chirps/red blinks for below 100 ppm, 3 chirps/red blinks for below 200 ppm, and 4 chirps/red blinks for above 200 ppm.

Important Technical Specifications:

Models: 70-742 and 70-742-R-Kit
Power Supply: 12 VDC
Nominal Current Draw: 108 mA (1.6 Amps with Solenoid Valve for R-Kit)
Operational Temperature: -40° F to +150° F (-40°C to +66° C)
Relative Humidity: 15% (+/-5%) to 95% (+/- 4%)
Audible Output: 85 dB @ 10 feet
Gas Alarm Trigger: < 25% of the LEL of Propane and Methane, with an 8-second delay before alarm.
CO Alarm Trigger: 4-15 Minutes @ 400 ppm
Case Dimensions: 6.5"W x 3.5"H x 1.38"D
Warranty: 1 Year Limited
Testing Laboratory Standard: Underwriters Laboratories UL 1484, Fourth Edition; UL 2034, Third Edition.
Sensor Service Life: 5 years. The unit includes an End of Life (EOL) Signal (LED flashing RED RED GREEN GREEN with a beep every 25-30 seconds) to indicate the sensor has reached the end of its service life, requiring replacement of the alarm. The EOL signal can be reset for 72 hours (up to 30 days total) by pressing the TEST/RESET button.

Usage Features:

Installation: The alarm requires a 1 1/2" (38mm) clearance. It should be installed in the kitchen area, near potential gas leak sources (furnace, refrigerator, stove, oven), and at least 4 inches but no more than 20 inches off the floor. It should not be installed behind furniture, drapes, in closets, within 12 inches of opening windows/doors/vents, on an outside wall, or on a wall switch-controlled power line.
Wiring: Connects to a properly fused 12 VDC circuit (14-18 GA wire, max 15 amps over protection). The 70-742-R-Kit model includes a normally closed relay (12 VDC, 3 amp max) that energizes when the alarm is operational. This relay can be used to shut down a generator or open an optional gas solenoid valve.
Warm-up Period: Upon initial power-up, the CO sensor requires a 10-minute warm-up (green LED flashes) before it can detect CO. The gas alarm requires approximately 1 minute warm-up.
Test/Reset Button: Used to test the alarm's electrical functions (not sensors) and to reset alarms or the EOL signal.
Alarm Procedures: Specific procedures are provided for both gas and CO alarms, including turning off appliances, evacuating the RV, ventilating, and seeking professional help to identify and repair the source of the leak.

Maintenance Features:

Weekly Testing: The alarm should be tested weekly by pressing the TEST/RESET button.
Six-Month Sensor Testing: The gas sensor can be tested using propane or butane gas (may take up to 10 seconds to sound). The CO sensor should be tested every six months using a can of SAFE-T-ALERT CO Test Gas to test the 400 ppm calibration point.
Cleaning: Vacuum dust off the alarm cover at least once a year (more frequently in dusty locations) using a soft brush attachment. Clean the alarm cover with a cloth dampened in clean water, then dry with a soft cloth. Do not spray cleaning agents or waxes directly onto the front panel, as this may damage the sensor.
Replacement: The unit must be replaced within five years of its production date, as the sensor has a limited service life. An "End of Life" signal will indicate when replacement is due.
Troubleshooting Guide: A comprehensive guide is provided for common issues such as the green operational LED being off, no sound during testing, locked-in alarm, malfunction alarm, and end-of-life signal, along with suggested causes and solutions.
Warranty: Opening the unit or attempting user-service voids the warranty. For issues, contact Customer Service for a Replacement Authorization (RA) number before returning the product.