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5.5 Temperature Control Sensor
The Temperature Control Sensor is coiled and secured to the control enclosure along with the Sensor Thermal Well.
Important: The thermal well must be installed in the return plumbing 1 to 4 feet from the return connection on the
boiler. The sensor should then be inserted into the thermal well along with thermal conductive paste. Use the plastic
threaded plug to secure the sensor in place. (See Illustration below.)
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TEMPERATURE CONTROL
SENSOR AND THERMAL WELL
5.6 Filling The Boiler
1. Fill the system with water. To be sure that the unit is not “air bound,” open the relief valve. Leave the valve open
until a steady flow of water is observed. Close valve and complete filling the system.
2. In hard water areas, water treatment should be used to reduce introduction of minerals into the system.
Excessive buildup of minerals in the heat exchanger can cause a non-warrantable failure.
3. Make sure there are no system leaks. DO NOT use petroleum based stop-leak products. All system leaks must
be repaired. The constant addition of make-up water to a closed loop boiler system can cause minerals to
collect in the heat exchanger. Excessive buildup of minerals in the heat exchanger can cause a non-
warrantable failure.
4. For systems requiring freeze protection, use only hydronic system antifreeze with a maximum concentration of
50%. Follow the glycol manufacturer’s instructions. DO NOT use undiluted or automotive type antifreeze.
6 GAS SUPPLY AND PIPING
Verify that the type of gas specified on rating plate is supplied to the unit. This unit is orificed for operation up to 2000
feet altitude. Appliance Btuh output derates 4% per 1000 feet elevation above sea level. Consult Factory for
installations above 2000 feet elevation.
6.1 Inlet Pressure: Measured at the inlet pressure tap located at the main gas cock. The inlet pressure must remain
within the minimum and maximum values while the unit is at rest and while the unit is operating at maximum firing
rate.
6.2 Manifold Pressure: Measure at the pressure tap on the downstream side of the manual shutoff valve closest to the
burner. The rated manifold pressure appears on the product data label located on the front of the appliance.
INLET PRESSURE NAT. GAS LP
Maximum Static Pressure (Inches-Water Column) 14" 13"
Minimum Flow Pressure (Inches-Water Column) 4.5" 11"
(38 strony)
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