Gas Solenoid Valves - BENSON RS UHA Assembly And Use Manual

Model SIT 840 (single stage)
PM Main inlet pressure test point
PV Head pressure test point
RP Pressure adjusting screws
RP1 Cross cut screw low fire adjuster
RP2 Hexagonal screw high fire adjuster
The heaters are supplied ready for use with (G20) Natural Gas set as per the table below. Conversion kits are available
from the manufacturer
Natural Gas H (G20)
TYPE
Number of injectors
Diameter of injector
Gas supply pressure
Head pressure high fire
Head pressure low fire (two stage–dual
power)
BEFORE CHANGING INJECTORS ENSURE GAS SUPPLY IS ISOLATED
To convert to Propane G31
1. Change injectors
2. Adjust the inlet gas pressure
3. Adjust the head pressure gas
4. Fit primary air diaphragm (if required)
5. Fit adhesive label indicating gas type
6. Ensure settings are correct as per manual.

GAS SOLENOID VALVES

Model SIT 843 (two stage)
GAS CONVERSION
1 2
1 1
310 410
12,0 13,0
6,0 7,0
31
3 4 5
1 1 2
480 555 500
20
13,0 13,0 10,0
6,5 6,5 7,0
6 7
2 4 N°
540 450 mm/100
mBar
13,0 10,5 mBar
6,5 5,0 mBar