Service manual for Suburban Dynatrail RV furnaces covering safety, installation, operation, maintenance, and warranty for models NT‑12S through NT‑42T.
The Suburban Dynatrail Service Manual provides detailed safety guidelines, model specifications, and general service information for a range of RV forced‑draft furnaces. It includes installation instructions for venting, return air, and ducting, as well as gas pressure requirements and a step‑by‑step sequence of normal operation.
Further sections cover operation details, preventative maintenance, cautions, furnace removal procedures, service hints, diagnostic procedures, warranty terms, and a flat‑rate service schedule. The manual is intended for service technicians and qualified RV owners who need to troubleshoot, repair, or maintain these propane‑fired furnaces.
| NT-12S BTU rating | 12,000 BTU/hr |
|---|---|
| NT-12S Current | 2.8 amps |
| NT-24SP BTU rating | 24,000 BTU/hr |
| NT-24SP Current | 3.5 amps |
| NT-42T BTU rating | 42,000 BTU/hr |
| NT-42T Current | 9.0 amps |
The operating pressure is between 10.5" and 13.0" of water column.
Suburban furnaces operate on 12‑volt DC supplied by a 12‑volt battery or a converter system.
The venting system should be inspected at least once a year, preferably before the heating season begins.
When lockout occurs, the gas valve closes and will remain closed until the thermostat circuit is broken; the furnace must be reset by turning the thermostat off and then back on.