Operating instructions

4. Installation
4.7 Fuel System
4.7.1 General Description
The metering pump, fuel line and fuel stand pipe are integral to the systems reliability and must be
installed according to these instructions to ensure proper heater operation.
Fig. 412: Typical Installation Parameters (Enclosure and Compact Kit)
Maximum suction height (A) = 3’3" (1m)
Supplied fuel line length (B) = 13’ (4m)
423
Thermo 90 S 4 Installation
CAUTION
If the fuel tank is higher than the fuel pump, the top of the tank may not be more than 20" above the
pump.
NOTE
Use supplied hose clamps to secure all fuel line connections.
CAUTION
If your installation exceeds the maximum allowable suction height or the fuel line as supplied is not
long enough, the fuel pump must be remotely mounted (see detailed instructions in sections 4.7.2
and 4.7.4)