Installation manual

Technical Data
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2. Technical Data
Except where limit values are specified, the technical data below refers to the usual heater tolerances of ± 10% at an
ambient temperature of 68°F (20 °C) and at nominal voltage.
Electrical components:
The control module, motors for combustion air blower and circulating pump, glow plug, and switch are designed for either
12 V or 24 V. The temperature limiter, temperature sensor and flame sensor are identical on 12 V and 24 V heaters.
Fuel for Thermo 90 ST
The diesel fuel specified by the manufacturer must be used. There are no known negative influences due to fuel additives.
If low-temperature fuel will be used, the heater must be operated for approx. 15 minutes so the fuel line and fuel pump are
filled with the new fuel.
Heater Operation Thermo 90 ST Diesel
EC licensing symbol e1*2001/56*0019*__
Model Water heater with Ferro-tec technology
Heat output Max.
regulating range
31,000 BTU
6,142 – 26,000
Fuel Diesel
Fuel consumption Max.
regulating range
0.29 gal./h
0.05 – 0.24 gal./h
Rated voltage 12 or 24 V
Operating voltage range 10 - 5 or 20 - 30 V
Max. ambient temperature:
Heater: - Operation -40° - 230°F (194°F with control module installed on the heater)
- Storage -40° - 230°F (194 °F with control module installed on the heater)
Control module:- Operation -40° - 185°F
- Storage -40° - 185°F
Metering pump:- Operation -40° - 140°F
- Storage -40° - 185°F
Max. operating pressure (heat medium) Max. 29 PSI
Capacity of the heat exchanger 0.04 gal.
Max. combustion air intake temperature +40 °C
Minimum capacity of the system 1 1/2 gal.
Delivery rate of the circulating pump against 2 PSI 436 gal./h
CO
2
in the exhaust fumes
(normal function range)
Max. 10 - 12% by volume
CO
2
- adjustment values at approx. 68°F (20 °C)
and geographic altitude above sea level
Max. 3280 ft. 11.3%
Heater dimensions (tolerance ± 3 mm)
* Control module installed on the heater
L 12” (307mm) or 13.85” (352*) mm with module attached
W 5.16” (131 mm)
H 9.13” (232 mm)
Weight 10.58 lb (4,8 kg)