Performance requirements for thermostats used with individual room electric space heating devices

Designation Number:
C828
Standard Type:
National Standard of Canada - Domestic
Standard Development Activity:
New Edition
Status:
Proceeding to development
SDO Comment Period Start Date:
SDO Comment Period End Date:
Posted On:

Scope:

This Standard specifies performance requirements for thermostat models intended for line-voltage (120 to 240 V) switching of a controlled resistive heating load.

The models covered by this Standard are as follows:

a) wall-mounted line-voltage thermostats used with baseboards, panel convectors, fan-forced heaters or radiant floors;

b) built-in line-voltage thermostats (up to 1500 W) used in baseboards, panel convectors or fan-forced heaters; and

c) two-component thermostats.

This Standard's requirements apply only to local zone thermostats; they do not apply to central heating units under the control of a single thermostat and thermostats in portable heaters.

Thermostats not covered by this Standard

Thermostats used exclusively or built-in in the following units are excluded:

a) ceiling-mounted fan-forced heaters;

b) floor-mounted fan-forced;

c) kick space; and

d) fireplaces.

Project need:

Since C828 will be due to be re-affirmed or revised in 2018, Hydro Quebec is proposing a revision of the clauses related to electromagnetic compatibility (clauses 4.5 and 4.6) at two levels. First, these clauses have never been revisited since the first edition of C828 ; the requirements are based on work done by LTE in the early 90s and, since then, technology has changed so it seems appropriate to have the thermostat manufacturers decide if changes are needed (the referenced standards within these clauses should also be checked). Second, Hydro Quebec LTE has noticed that problems of synchronism and/or light flickering can arise from communicating thermostats since all the thermostats within a house are commuting at the same time.

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