I nst al l at i on,Oper at i onand Mai nt enanceManual
A. Introduction Heat Controller, Inc., air handlers come in a variety of models and sizes for upflow or horizontal use and when combined with cooling coils, are ready for air conditioning and heat pump applications. These instructions are primarily to assist qualified individuals in the proper installation of this equipment Refer to local codes and regulations for additional guidance. 9. B. Rules for Safe Installation and Operation 1. Read these rules and the instructions carefully.
ARRANGEMENT Unit is shipped from the factory arranged to be installed in a vertical upflow or horizontal right to left airflow position (standard) or field convertible to a horizontal left to right airflow position. IT IS MANDATORY TO USE AN EMERGENCY AUXILIARY DRAIN PAN WITH ANY COIL OR AIR HANDLER INSTALLED IN AN ATTIC OR ABOVE A FINISHED CEILING! Upflow Application In an upflow application the discharge outlet is at the top.
G. BLOWER MOTOR Units are equipped with a three-speed blower motor. Two factory-selected motor speed leads are connected to the fan relay (FR) to provide automatic speed change for heating and cooling airflow volumes. The pre-selected motor speeds would normally not have to be changed in the field. All AHG models contain a blower “ON” time delay (BDR) as well as a post purge timer (TDR) that delays the blower turning off at the end of the cooling cycle, this improves energy efficiency.
J. CONDENSATE DRAIN M. SYSTEM SHUTDOWN For short periods of time during freezing temperatures if the system is to be left unused, to prevent freezing of the air handler and piping, do the following: Do not turn the system off. Leave the air handler’s thermostat on heat setting. If the water and air handler must be shut down for extended periods, a qualified service technician needs to be contacted to ensure the air handler and piping are drained of all water as to prevent freeze damage.
DIMENSIONS AHG - 24, 30 AHG - 36, 48, 60 Design, specifications, performance data and materials subject to change without notice. 1900 Wellworth Ave., Jackson, Michigan 49203 • Ph. 517-787-2100 • Fax 517-787-9341 www.heatcontroller.com THE QUALITY LEADER IN CONDITIONING AIR 06/2009 Rev.
