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Cambridge Air Solutions M125 - 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

  • D
    David HaynesAug 7, 2025
    What to do if Cambridge Air Solutions Heater indicates a device fault?
    • G
      Gabrielle DelgadoAug 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.
  • J
    James SwansonAug 22, 2025
    What to do if Cambridge Air Solutions Heater loses power but is still connected?
    • B
      Brandy NortonAug 22, 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

M-SERIES TECHNICAL MANUAL

HAZARD SUMMARY

Safety Warnings and Cautions

Presents important warnings and cautions for safe installation and operation.

INSTALLATION INSTRUCTIONS

Horizontal Mount Configurations

Details for roof top, stand mount, and thru-wall installations.

Vertical Mount Configurations

Instructions for outdoor and indoor vertical mounting.

Gas Piping and Electrical Wiring

Guidance on proper gas piping and electrical wiring for installation.

START-UP INSTRUCTIONS

Visual Inspection and Verification

Checks for physical damage, wiring, and supply voltage/pressure.

Blower and Burner Adjustments

Procedures for checking blower rotation, pressure drops, and manifold pressure.

OPERATING INSTRUCTIONS

MAINTENANCE INSTRUCTIONS

Cambridge Air Solutions M125 Specifications

General IconGeneral
BrandCambridge Air Solutions
ModelM125
CategoryHeater
LanguageEnglish

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