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1 Samson Regulator
The Samson Reg. is designed to regulate the draft going into the draft intake.There is no electricity needed to
operate the Samson reg.
Set Up - thread Samson Reg. into 3/4” fitting at top left (see page 6) when installing chain from Samson Reg. to
draft intake. Turn knob clockwise and connect chain so lid is shut and chain is tight. Then turn knob counter-
clockwise to increase draft.
2 Temperature Pressure Gauge
The Temperature Pressure Gauge has two features:
A - Needle shows temperature of water
B - Needle shows water pressure
Note:
Normal pressure for closed systems are 12-15 lbs.
Warning: Do not exceed 200 degree water temperature.
Thread temperature pressure gauge into 1/2 inch fitting at top right corner (see page 6)
3 30# Safety Valve
This is a pop-off valve. At 30 PSI hot water will dump out of the 30# safety valve.
Installation Instruction: You must run some sort of high temperature pipe down to the floor from the safety
valve. Install a drain in the floor if possible.
Thread 30# safety valve into 3/4 fitting at top left back (see page 6)
4 Automatic Fill Valve / Pressure Reducung Valve
The Automatic Fill Valve needs to be hooked up to the water supply line connected to your system.
The Automatic Fill Valve will reduce pressure to 12 lbs. and keep water supplied.
A water line with an automatic fill valve can be hooked up anywhere in your system.
5 Expansion Tank
An Expansion Tank is designed to maintain the boiler pressure at 12-15 lbs.
Every degree the temperature rises the boiler will gain 1 lb. of pressure. The expansion tank will absorb the
pressure and keep it at 12-15 lbs. in normal temperature ranges. This normally gets hooked up to the hot water
horizontal line close to the boiler.
6 Circulator Pump
A Circulator Pump is designed to circulate water through your heating system. This normally runs off 110 volts,
12 volts, or air. The thermostat controls the circulator.
We recommend the circulator pump be set up in the return line close to the boiler, pushing water into the boiler.
7 Aquastat (High Limit)
The Aquastat is a safety feature. It will override the thermostat. If the thermostat is not calling for
heat the circulator will not run. If water is not circulating through your system the water temperature will rise
slowly. The Aquastat wires get hooked up to the thermostat wires. Set the High Limit Aquastat to 190 degrees.
If the water temperature rises to 190 degrees, the circulator will run.
8 Domestic Water Coil
The Domestic Water Coil will heat 4 gallons per minute when the water temperature is set at 160 - 180 de-
grees. The coil has a bolt on flange with a gasket that holds coil into the back of the boiler.
NOTE:
Always hook up a mixing valve when using a domestic water coil, or someone could get burnt.
9 Air Purger
The Air Purger can also be called an Air Scoup. It is designed to do three things:
• Capture air pockets, which is then released by the air vent.
• Mounts the automatic airvent
• Mounts an expansion tank
Boiler Controls
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