SUN - UL 1995, CSA C22.2 No. 236-11 Addendum - Heating and Cooling Equipment

Effective February 27, 2015

ADDENDUM: This ADDENDUM replaces SUN issued March 2012 and November 8, 2013:  Extension of effective date to 27, 2015.

Standard Information
Standard Number:
UL 1995 and CSA C22.2 No. 236-11 (Bi-National Standard)
Standard Name:
Heating and Cooling Equipment
Standard Edition and Issue Date:
4th Edition Issued (New) October 14, 2011
Date of Revisions:
Date of Previous Revisions to Standard:
3rd Edition February 18, 2005 Revised July 30, 2009
Effective Date of New/Revised Requirements

Effective Date (see Schedule below): February 27, 2015

Impact, Overview, Fees and Action Required

Impact Statement: A review of all Listing Reports is necessary to determine which products comply with new/revised requirements and which products will require re-evaluation. NOTE: Effective immediately, this revised standard will be exclusively used for evaluation of new products unless the Applicant requestsin writing that current requirements be used along with their understanding that their listings will be withdrawn on Effective Date of February 27, 2015 unless product is found to comply with new/revised requirements.

Overview of Changes: Significant new and revised requirements are contained in the new 4th Edition of UL 1995. Refer to page tr1-tr3 of the 4th Edition and refer to a synopsis of new/revised clauses in table below.

Processing Schedule: So that production of products bearing Listing Marks will not be interrupted, the following schedule has been established to ensure Listing Reports are found compliant by Effective Date:

  • May 2, 2014 = 8 Month Report Identification – Intertek will identify all UL 1995/CSA 236-11 Certification Reports and provide to the customer’s Account Representative for preparation of the necessary quotations.
  • July 4, 2014 = 6 Month Quote Cut-off – Quotes returned for necessary re-evaluations.
  • October 31, 2014 = 30 Day Warning – Client advised of all non-compliant Reports to be Suspended.
  • February 27, 2015 = Effective Date – ATM Suspended for all non-compliant Reports.

Fees: Due to the magnitude and severity of the new/revised requirements in UL 1995/CSA C22.2 No. 236, quotations will be prepared for the review and possible re-tests anticipated. SVN will only identify valid Certification Reports for each customer and will not be conducting any up-front review and direct-invoicing as is norm.

Client Action Required: Submit Information – To assist the Intertek Engineer with evaluation of your Reports, please submit technical information in response to the new/revised paragraphs noted in the attached.

Current Listings Not Active? – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records. We will do this at no charge as long as Intertek is notified in writing prior to the review of your reports.

Description of New/Revised Technical Requirements

NOTE: Additions to existing requirements are underlined and deletions are shown lined out below.

8.2c Clause 8.2 c requires that interlock mechanisms must be located so that unintentional operation is unlikely during normal servicing.
8.3 Interlock switches shall be rated for 1 000 cycles of operation under load and 5 000 cycles without load.
8.4 Clause 8.4 requires that an interlock must open all supply conductors (when used to reduce risk of electric shock).
17.10 Terminal blocks are required for field wiring connections unless the device to which field wiring is attached (e.g. a contactor) is identified for field wiring connections in accordance with the National Electrical Code or Canadian Electrical Code as applicable.
18.2, 18.2a, 18.2g Materials in air handling compartments that are not covered by ULC S-102 and UL 723 (also known as ASTM E-84), for example, luminaires in an air handling compartment, shall be tested according to UL 2043 for optical density of smoke generated and heat release rate.  In addition, equipment that is intended for installation in air handling plenum is subject to UL 2043 in its entirety. 18.2a and 18.2g expressly updated to add Media Wheels and Plates as well as compliance with ANSI/NFPA 701.
18.10 In addition to air filters, media wheels and plates employed for heat recovery purposes, shall conform to ANSI/UL 900.
20.12 New requirement for support of flexible conduits.  Flexible conduit shall be supported within 756 mm (30 in) of each termination and at intervals of not more than 1361 mm (54 in) between terminations.
20.16 Clause 20.16 has been updated to add crankcase heater circuits to the list of circuits that could require limited short circuit testing.
20.18 Wiring that is subject to movement in normal use or maintenance shall be subjected to the Flexing Test in Clause 80.
23.11 New requirements for electronic motor overload protection devices or systems.  Electronic overload protection shall conform to 23.15B of UL991/UL1998; in Canada, CSA-C22.2 No.08 and CSA-ISO/IEC 16085, OR UL 60730-1/UL 60730-2-9 Clause 23.15C; in Canada, CSA E60730-1/E60730-2-9 OR UL 508C Clause 23.15D, in Canada, CSA C22.2 No. 14.
There is an exception for equipment that attains a satisfactory result in abnormal testing where the electronic overload protection is made ineffective by shorting or opening, as appropriate to the control method.
26.10 Motor controllers shall break all ungrounded conductors.
26.20 New section containing requirements for motors using solid-state speed controls.  In addition to 26.20, where the speed control is of the wave-chopping type, the motor shall be subjected to new Clause 52, half-wave test.
27.5 Clause 27.5 has been updated to indicate that thermal cutouts must now comply with UL 60691. A manual or automatic resetting thermal protector may also comply with UL 60730-1 and UL 60730-2-9 or with CSA E60730-1 and CSA E60730-2-9.
28/28.3 Added references to UL 810 and CSA-C22.2 No. 190 as standards for capacitors.
30.15 Clause 30.15 has been updated to indicate that the controllers for Electric Heat circuits must open all ungrounded conductors (no phase break).
Clause 31 New requirements for receptacles included in heating and cooling equipment.
34.36 A contactor used in a pressure-limiting circuit shall be rated for 100 000 cycles of operation.
34.4 Water coils operating at less than 93 are subject to a strength test at 2 times operating pressure or 1035 kPa, whichever is higher.
35.13 Clause 35.13 has been added which requires that controls shall have an endurance rating not less than 30,000 cycles. May also comply with UL 60730-1 and UL 60730-2-9 or with CSA E60730-1 and CSA E60730-2-9.
37.3j Marking requirement for refrigerants adds reference to ANSI/ASHRAE 34.
38.5 Clause 38.5 has been added which requires connection points intended for ELV connections be marked “CLASS 2” or the equivalent.
38.16 Added marking requirement for equipment containing motors intended for use with remote solid-state speed controls.
45.2 In abnormal testing for indoor fan failure, all indoor fan motors are to be disconnected from power sources.
46.2-46.7 Heat pumps containing electric heaters are subject to Continuity of Operation tests with refrigerant heat and electric resistance heat operating simultaneously unless the control system prevents simultaneous operation.
46.9 Clause 46.9 has added requirements for makeup air units that have electric heaters operate at conditions below 80 F.
48.1 Backup protection test applies to non-ducted as well as ducted equipment.
52 Clause 52 has been added which is a new testing method to test motors used with Wave Chopping Solid State Speed Controllers.
54.2/54.3 Added 500 V dielectric voltage withstand test for Extra-low Voltage circuits.
56.3/56.4 New requirement for a static loading test of equipment intended to be supported from a wall, ceiling, or structural part of a building. 
61.5-61.8 Added acceptance criterion for unlisted polymeric materials covered in Table 61.3.

CUSTOMERS PLEASE NOTE: This Table and column "Verdict" can be used in determining how your current or future production is or will be in compliance with new/revised requirements.


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