Sales (2)
| Title | Date Posted | Size | ||
|---|---|---|---|---|
| Heating and Cooling Components Application Selection and Cross Reference Guide (English) | 07/2024 | 2001713 kb |
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| Residential Combustion Application Selection and Cross-Reference Guide (English) | 11/2023 | 9194921 kb |
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Install (3)
| Title | Date Posted | Size | ||
|---|---|---|---|---|
| Installation Instructions for AT20, AT40, AT72D, AT87, AT88 Transformers (English, French) | 08/2020 | 822594 kb |
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| Installation Instructions for AT72D Transformers SUPER Tradeline (English) | 09/1986 | 131145 kb |
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| Transformers -Legacy Product Document | 10/1993 | 362577 kb |
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| Application | 40 VA transformers power 24 V systems including thermostats, gas valves and relays. |
|---|---|
| NEMA Rating | Yes |
| Primary Connection Size | 9 in, 229 mm |
| Primary Connection Type | Leadwires: Black and White |
| Primary Input Voltage | 208/240 V ac |
| Secondary Connection Type | (2) screw terminals |
| Secondary Open Circuit Voltage | 26.5 V.O.C. |
| VA Rating | 40 VA |
| Frequency | 50 Hz; 60 Hz |
| Approvals and Standards | UL Component Recognized, CSA Certified, NEC Class 2 |
| Ambient Operating Temperature (Max) | 105 °F, 41 °C |
| Ambient Operating Temperature (Min) | -20 °F, -29 °C |
| Product Height | 6.44 in; 164 mm |
| Product Width | 3 in; 76 mm |
40 VA Transformers for 24V Systems including thermostats, gas valves and relays.
- Override protection
- Color-coded lead wires for primary connections
- Energy limiting and meets NEMA Standard DC20-1992
- Transformers are marked NEMA Type D enclosure
- Meets NEC Class 2 not wet, Class 3 wet and UL 1585 requirements