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Cambridge Air Solutions M136 - User Manual

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M-SERIES
DRAW THRU
DIRECT GAS-FIRED
MAKE-UP AIR HEATERS
TECHNICAL MANUAL
M-TM2-0120
WARNING:
Improper installation, adjustment, alteration, service or maintenance can cause property
damage, injury or death. Read the installation, operating, and maintenance instructions
thoroughly before installing or servicing this equipment.
FOR YOUR SAFETY
The use and storage of gasoline or other flammable vapors and liquids in open containers in
the vicinity of this appliance is hazardous.
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don’t touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
Made in the USA
®
90.1
ASHRAE
ASHRAE
COMPLIANT
COMPLIANT
®

Table of Contents

Questions and Answers

  • S
    Shannon HuffmanAug 7, 2025
    What to do if Cambridge Air Solutions Heater indicates a device fault?
    • A
      Ashley MccarthyAug 7, 2025
      If the Fault LED is on steady, it means a main code download is required. This could be because no application is loaded, the controller is in boot mode and needs a main code download, or there's a firmware mismatch between the PEAK controllers and the ZRF1811 Wireless Field Bus Router. In any of these cases, performing a main code download is the suggested solution.
  • D
    David WebsterAug 22, 2025
    What to do if Cambridge Air Solutions Heater loses power but is still connected?
    • J
      Jennifer JohnsonAug 23, 2025
      If your Cambridge Air Solutions Heater is connected to power but remains off, you should check the output wiring for short circuits and then cycle power to the controller.

Summary

HAZARD SUMMARY

Safety Precautions

Details important safety warnings regarding modifications, personnel, and airflow.

INSTALLATION INSTRUCTIONS

Gas and Electrical Connections

Covers essential installation steps for gas piping and electrical wiring.

START-UP INSTRUCTIONS

TROUBLESHOOTING GUIDE

Blower Operation Issues

Addresses problems related to no blower operation or blower running with no heat.

Burner and Flame Issues

Covers troubleshooting for burner not firing or flame safeguard relay lockouts.

High Limit and Cycling Problems

Solutions for tripped high limits and units that won't cycle off.

Modulating Valve and Flame Issues

Troubleshooting for modulating valve problems and erratic flames.

Cambridge Air Solutions M136 Specifications

General IconGeneral
Input Capacity1, 350, 000 BTU/hr
Airflow13, 600 CFM
Phase3
Number of Heating Stages2
MountingSuspended

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