Globally, ductless heat pumps are the standard method of heating and cooling residential and commercial buildings. In North America the post-war building boom favoured ducted systems but we since realized there are advantages to ductless systems, especially to cool.

For commercial applications, Variable Refrigerant Volume (or Flow) systems are quickly becoming an option of choice in North America. In Japan where VRV/F was invented in 1982 half of all small commercial buildings use this ductless system.

If you are in Ontario contact me at ductlessontario@gmail.com for design, pricing, selection, installation, or technical assistance. Posts here are provided for information purposes only and not necessarily endorsed.

Tuesday, August 28, 2012

Operations Manual: VARIABLE REFRIGERANT FLOW MULTI-SPLIT AIR-CONDITIONERS AND HEAT PUMPS CERTIFICATION PROGRAM

PREFACE


The following manual outlines the procedures and policies of the Performance Certification Program for Variable Refrigerant Flow (VRF) Multi-Zone Air-Conditioners and Heat Pump Certification Program operated by the Air-Conditioning, Heating, and Refrigeration Institute (AHRI). This manual is to be used in conjunction with the AHRI General Operations Manual for AHRI Certification Programs. Where the AHRI General Operations Manual and this product-specific manual differ, this product-specific operations manual shall prevail.

The revision of this manual supersedes all previous revisions. The current edition of this manual, as well as the AHRI General Operations Manual, can be accessed through the AHRI website, www.ahrinet.org. 

The AHRI VRF Certification Program by AHRI provides for independent verification of the performance of the Participant’s equipment. Safety criteria are not within the scope of this program.

Participation in the program is voluntary. Any manufacturer, regardless of AHRI membership, may obtain approval of Program Ratings and use of the AHRI VRF Certification Mark hereinafter referred to as the “Mark”. The Mark is the Participant’s public representation that the ratings of randomly selected units have been verified by an independent laboratory in accordance with test procedures prescribed by this operations manual. A Certification Agreement is executed between the manufacturer and AHRI specifying the conditions under which such Ratings and the Mark may be used. No manufacturer has the right to use Program Ratings or to state that their products have been tested in conformance with the procedures outlined in this Rating Procedure unless and until they have received written authority from AHRI to use the Marks as applied to the specific approved Program Ratings.

This Operations Manual has been prepared to assure that administration of the program is carried out in a uniform manner. It is an amplification of the license agreement signed by licensees and AHRI. General information, procedural details, and copies of forms are included in this Operations Manual. Provisions of the Operations Manual may be amended as provided in the Certification Agreement.
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