Burnham V8 Series manual Float-Type Low Water Cut-Off Pressure Limit Installation

Figure 8: Float-Type Low Water Cut-Off and

Pressure Limit Installation

Figure 9: Pressure Limit Installation for Probe

LWCO Equipped Boilers

NOTICE

L404A Pressure Limits contain mercury in a sealed tube. Do not place limit in the trash at the end of its useful life.

If this limit is replacing a limit that contains mercury in a sealed tube, do not place your old limit in the trash.

Contact your local waste management authority for instructions regarding recycling and the proper disposal of this limit, or of an old limit containing mercury in a sealed tube.

If you have questions, call Honeywell Inc. at

1-800-468-1502.

e.An L404F pressure limit does not require leveling.

7.On units with a heater opening, install the aquastat controller well in the ½" NPT or ¾” NPT tapping in tankless heater plate or cover plate. Slip the bulb of the aquastat into the well and secure the control in place with the set screw.

WARNING

Aquastat bulb must be fully inserted into the well.

8.Connect the field wiring to the pressure limit, the LWCO, the R8239A Control Center/J-box and the burner J-box or burner disconnect J-box.

If equipped with tankless heater, connect field wiring from the aquastat control to the R8239A Control Center transformer terminals or oil burner primary control's "T-T" terminals.

Make the wiring connections as shown in Figures 19, 20 and 21.

NOTE:

•The R7184P Primary Control has pre-installed "T-T" jumper resistor. To activate "T-T" terminals, "T-T" jumper must be removed. To remove, use side cutting pliers to cut jumper (see Figure 28).

•Do not remove (cut) "T-T" jumper unless wiring diagram indicates a direct connection from thermostat and/or tankless heater aquastat control to the oil burner primary control's "T-T" terminals.

Refer to Paragraph S for details on use of burner disconnect junction box provided with all knockdown boiler builds.

O.INSTALL TRIM AND CONTROLS WITH BECKETT BURNER. - Water Boilers Only (See Figures 1A, 1B, 1C and 5).

1.Thread ½” NPT pipe plugs into gauge glass tappings in the upper right side of front section.

2.Thread ¾” NPT pipe plug in probe low water cut off tapping (just left of gauge glass tappings).

3.Thread combination pressure/temperature gauge into ¼” NPT tapping. Tighten with wrench applied to the square shank of the gauge.

CAUTION

Do not apply pressure to the gauge case - this may result in inaccurate readings.

4.Screw drain valve into ¾" NPT side outlet of the 1½” NPT x 90° elbow (note - lower front section tapping “G” is used for standard return on water boilers).

5.If circulator (not supplied with boiler) is to be mounted directly to 1½" NPT boiler return tapping "G", use the piping arrangements outlined in steps a. thru e. as follows: (see Figures 13A, 13B and 13C)

a.Thread 1½” NPT x 3” long nipple and 1½”

NPT x 90° elbow with ¾" NPT side outlet into the return tapping and tighten with a pipe wrench.

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