EngA AF Series - User Manual

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IOM-52 Apr 13 R2

INSTALLATION, OPERATION

AND MAINTENANCE MANUAL

FOR

AF / DCU SERIES

AIR COOLED CONDENSERS and FLUID COOLERS

UNIT MODEL NO. _________________

UNIT SERIAL NO. _________________

SERVICED BY: ___________________

TEL. NO: ________________________

CANADIAN

HEAD OFFICE

AND FACTORY

USA

HEAD OFFICE

AND FACTORY

CANADIAN

EASTERN FACTORY

1401 HASTINGS CRES. SE

CALGARY, ALBERTA

T2G 4C8

Ph: (403) 287-4774

Fx: 888-364-2727

32050 W. 83

STREET

DESOTO, KANSAS

66018

Ph: (913) 583-3181

Fx: (913) 583-1406

1175 TWINNEY DRIVE

NEWMARKET, ONTARIO

L3Y 5V7

Ph: (905) 898-1114

Fx: (905) 898-7244

SALES OFFICES ACROSS CANADA AND USA

Retain instructions with unit and maintain in a legible condition.

Please give model number and serial number when contacting

factory for information and/or parts.

www.engineeredair.com

Main Page

Questions and Answers

K
Karen MahoneyJul 28, 2025
Why does my EngA Accessories have high head pressure?
- J
  Jaime JacobsJul 28, 2025
  High head pressure in your EngA Accessories can be caused by several factors. A dirty condenser can restrict airflow, so cleaning or washing it is recommended. Flattened or hail-damaged fins can also impede airflow; comb the fins to straighten them. Other potential causes include condenser fan motors not running (check and correct the problem), a broken condenser fan blade (replace the blade), a defective or incorrectly set condenser fan cycling control (adjust or replace as needed), condenser air short-circuiting (check the temperature of inlet air and correct as required, ensuring proper airflow clearances), an overcharged system with refrigerant (reclaim excess refrigerant), or non-condensables in the system (reclaim refrigerant, evacuate the system, and recharge with new refrigerant).
J
James ChristensenAug 12, 2025
What to do if control relays chatter or solenoid valves are not energized in EngA AF?
- D
  Douglas LeeAug 12, 2025
  If you're experiencing control relay chatter or solenoid valves not energizing in your EngA Accessories, it could be due to a voltage drop in the field wiring to the solenoids or thermostat (greater than 10%). Check the voltage at the solenoid or relay when it is energized; if it is less than 10% of the rated voltage, check the wire size or determine the cause and repair as required. Another possible cause is the primary voltage not being within 10% of the unit rating plate, in which case you should have an electrician check and repair as required.