THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED TECHNICIAN.
WARNING
Risk of explosion. Can cause injury or death. The factory supplied pressure relief valve MUST be connected to the system with the supplied fittings.
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DO NOT modify this assembly.
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DO NOT cap, plug, or otherwise obstruct the outlet of the pressure relief valve.
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DO mount the pressure relief valve in a vertical, upright position.
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This pressure relief valve is sized to service the needs of the Comfort Plus Hydronic heating system. If multiple heating systems are being used, pressure relief valving for the other system MUST be provided separately.
Remove Access Panel
Remove the exchanger access panel and locate the pressure relief valve assembly.
Connect Pressure Relief Valve
Connect the pressure relief valve to the outlet water port on the left side of the Comfort Plus Hydronic. It is extremely important that the following conditions for installation of this part are met:
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Ensure all connections, including the valve inlet are clean and free from any foreign material.
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Use pipe compound sparingly, or tape on external threads only.
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Mount the pressure relief valve in a vertical, upright, position directly to the outlet water port of the system. Under no circumstances should there be a flow restriction or valve of any type between the safety relief valve and the pressure vessel.
CAUTION
Risk of discharged hot water and/or steam. Can cause personal injury or property damage. During operation, the pressure relief valve may discharge large amounts of steam and/or hot water. To reduce the potential for bodily injury or property damage, install a discharge line.
Install Discharge Line
Use schedule 40 pipe to install a discharge line for the pressure relief valve. This discharge line MUST:
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be connected from the valve outlet with no intervening valve and directed downward to a safe point of discharge.
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allow complete drainage of both the valve and the discharge line.
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be independently supported and securely anchored to avoid applied stress on the valve.
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be as short and straight as possible.
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terminate freely to atmosphere where any discharge is clearly visible and is at no risk of freezing.
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terminate with a plain end that is not threaded.
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be constructed of a material suitable for exposure to temperatures of 375°F/190°C or greater.
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be, over its entire length, of a pipe size equal to or greater than that of the valve outlet.
|
Available Pressure Relief Valves |
Minimum BTU Rating |
Maximum Operating Pressure |
Order Item |
|---|---|---|---|
|
30 PSI |
400,000 |
20 PSI |
1100104 |
|
75 PSI |
500,000 |
60 PSI |
1100105 |
|
150 PSI |
500,000 |
125 PSI |
1100106 |
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NOTE: 5100 Series Systems are shipped with 30 PSI pressure relief valves. If a different valve is required, order the item number listed. |
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