Comments on ASA Approval Requirements to be Submitted for Adoption as CSA Standards

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Technical Note (National Research Council of Canada. Division of Building Research), 1959-09-01

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Comments on ASA Approval Requirements to be Submitted for Adoption as CSA Standards

Kent, A. D.

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DIVISION OF BUILDING RESEARCH

'JrE

C

1HIN II CAlL

NATIONAL RESEARCH COUNCIL OF CANADA

ｶｾｴ

NOTlE

No.

293

NOT FOR PUBLICATION

PREPARED BY AeD. Kent CHECKED BY AGW

FOR INTERNAL USE

APPROVED By NBH

PREPARED FOR Subcommittee Noo 3 CSA Committee on .,

Gas Burning Appliances and EquipmentW DATE September 1959

SUBJECT

COMMENTS ON ASA APPROVAL REQUIREMENTS TO BE SUBMITTED FOR ADOPTION AS CSA STANDARDS

The ｣ｯｭｭ･ｾｴｳ in this note pertain to the following proposed and existing ASA specifications:

(a)' (Proposed) Approval Requirements ｾＮｦｯｲ Gravity and Fan

Type Floor Furnaoes (Z?1.13e3)

(b) (Proposed) Approval Requirements for Gas-Fired Room

Heaters (Z210ll)

(c) (Proposed) Addenda to Approval Requirements for Gravity and Fan Type Vented Reoessed Heaters (Z2lol304a) (d) Addenda to Approval Requirements for Gravity and Fan

Type Floor Furnaces (Z2lol303b-1958)

(e) Addenda to Approval Requirements for Gas-Fired Room

Heaters ＨｚＲｬｾＱＱｯ｢ｾＱＹＵＸＩ

(f) Approval Requirements for Gravity and Fan Type Vented

Reoessed Heaters ＨｚＲＱＰｬＳＰＴｾＱＹＵＸＩ

The material in items (d) and {e} above has been inoor-porated in the new' draft proposals for Ca) rand (b) respectively and therefore items (d) and (e) can be disregarded as far as new material is oonoernedo

Presumably the present CSA speoifications B1500149 B1500l6 and B1500l5 correspond with the ASA counterparts issued immediately prior to (d) (e) and (f) aQove9 except for the normal ･､ｩｴｯｲｬｾｬ

and format ohanges neoessaryfor Canadian ｳｰ･ｯｩｦｩｯ｡ｴｩｯｮｾ and other revision$ as were contained in the letter ballot of August 1958.

*Reference: Letter of JoSo Allen to suboommittee members September 109 19590

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2

-A review of the -AS-A documents (a) to (f) above with regard to their suitability for adoption as CSA standards gives rise to the following comments:

1. Definitions

The terminology for valves is not consistent. Z21.13.3 and ｚＲＱｾＱＳＮＴ seem to. be in close agreement but Z21.1l differs in many respects to these two, e.g. automatic valves, diaphragm valves, electric type automatic valves, manual shut-off valves.

Similarly the definition for the pipe or conduit connecting an appliance to a flue or vent is a "vent connector" in ｚＲｾＱＮＱＳＮＳ

and Z21.13.4 but is a "flue pipe (vent pipe)" in Z2l.l1. Strangely enough in both ｚＲＱＮｬＳＮｾ and Z21.13.4 the term "flue pipe" is used in the de-:flnitionf'oI' ffflue collar".

2. Clause 1.1.5, Z2l.l3.4a

The last line of this clause refers to a No. 20 DMS drill. Reference to ASA B.5.12-l9.58 and CGSB 46-GP-.5 which is dated

4

September 1959 and to recent editions of machinery handbooks

sheds no light on this designation "DMS". The standard twist drill No. 20 (Stubs' Wire Gauge) as used by ASA and CGSB is 0.161 inches in diameter. If the intention of the clause is to establish amintmum size of opening it would seem strange that the circular opening be limited to 1/8ft _{while the irregular-shaped opening is}

reqUired to be not less than .161 inches when the irregular shape would allow considerably more area to begin with. A Woo 30 drill

is'roughly equivalent to 1/8". 3. Clause'l.14,2, Z21.13.4a

The second sentence viz. nThe adjustment ••••••••••••••••

. . . oinput ratingtt needs attention. Suggested alternatives:

(a) The adjustment means shall not be capable ••••••••• input rating, or

(b) The adjustment for the lowest flow condition shall result in a flow rate not lower than ••••••••••

input rating, or

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-40 Clause 20248 Z2lol30y!

In Table III the last column gives the minimum thiokness for the metal of ｨｾ｡ｴｩｮｧ elements. There is no accompanying text in olause

2.24

referring to these thioknesses or which requires that these shall be adhereQ to 1n their manufaoture. In faot such a clause would normally appear in the construction requirements under 1018 Thickness of ｍ｡ｴ･ｲｩ｡ｬｾＮ It is suggested that this last oolumn of Table III be deleted or transferred to 1.18 with appropriate text. If the thicknesses given form a table of equivalence in "strength, rigidity, ､ｾｲ｡｢ｩｬｩｴｙＹ resistanoe to oorrosion and other physioal ｰｲｯｰ･ｲｴｩｾｳＢ (see 1.18) this should be noted presumably 1n 1018.