Pressure Relief Valve Installation; Condensate Drain And Piping - Watts AERCO CFR 3000 Installation And Start-Up Manual

SECTION 2: INSTALLATION

2.6 Pressure Relief Valve Installation

An ASME rated Pressure Relief Valve is supplied with each CFR Boiler. The pressure rating for the relief
valve must be specified in the sales order. Available pressure ratings range from 30 to 160 psi (207 to
1103 kPa). The relief valve is installed on the hot water outlet of the boiler as shown in Figure 2-6.
A suitable pipe joint compound should be used on the threaded connections. Any excess should be wiped
off to avoid getting any joint compound into the valve body. The relief valve must be piped to within 12
inches (30.5 cm) of the floor to prevent injury in the event of a discharge.
IMPORTANT: No valves, restrictions, or other blockages are allowed in the full port discharge line.
IMPORTANT: In multiple unit installations the discharge lines must NOT be manifolded together.
IMPORTANT: Each must be individually run to a suitable discharge location.
PRESSURE
RELIEF VALVE
4" HOT BOILER
WATER OUTLET

2.7 Condensate Drain and Piping

The installation must have provisions for suitable condensate drainage or collection. The condensate drain
port located on the exhaust manifold must be connected to the condensate trap (P/N 24789). Its inlet and
outlet connections contain tapped 3/4" NPT ports. A sample condensate trap installation is shown below.
The installation details for the trap will vary depending on available clearances, housekeeping pad
dimensions and other conditions at the site.
NOTE: The following guidelines MUST be observed to ensure proper condensate drainage:
• The condensate trap inlet must be level with, or lower than exhaust manifold drain port.
• The base of the condensate trap must be supported to ensure that it is level (horizontal).
• The trap must be removable for routine maintenance. AERCO recommends that a union be utilized between
the exhaust manifold condensate drain port and the trap inlet port.
• If the condensate trap does not connect directly to the exhaust manifold condensate drain port, the pipe
between the drain and the trap must be stainless steel or aluminum.
• The concrete housekeeping pad must not extend under the condensate assembly.
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Figure 2-6: P&T Relief Valve Location
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INSTALL TRIDICATOR
GAUGE HERE
(P/N 123675-TAB)
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