Tankless Heater or Coverplate, Controls

E.TANKLESS HEATER OR COVERPLATE

1.If a tankless coil is used (item 9), install as pictured. On water boilers, install in opening in front section. On steam boilers, install in opening in rear section. For suggested piping of tankless water heaters refer to Figures 3.3 and 3.4.

Install anti-scald device in hot water DANGER supply piping. Water temperature

above 125°F can cause severe burns instantly or death from scalds.

X1019R, X1020R, and PP1011R NOTICE coils installed in WBV boilers have

internal flow controls installed. Do not use external flow controls with these coils.

Figure 3.3: Tankless Coil Piping, Steam Boiler

Figure 3.4: Tankless Coil Piping, Water Boiler

PIPING AND CONTROLS

2.If not using a tankless coil, cover the heater opening with cover plate (item 7 or 16).

Be sure rubber gasket is in place NOTICE between cover plate or water heater

plate and boiler section.

F.CONTROLS

Pipe the discharge of the safety CAUTION valve or relief valve to prevent injury

in the event of pressure relief. Pipe the discharge to a drain. Provide piping that is the same size as the relief valve.

1.Water Boiler Controls:

a.Install the limit / operating control, pressure- temperature gauge and safety relief valve. See Figure 7.1 (Section 7) for proper location. For installations subject to UL726, a second operating control that senses water temperature is also required (not provided). Use an L4080B or equivalent. Install in the supply piping near the boiler.

2.Steam Boiler Controls:

a.Install the limit / operating control, pressure gauge, gauge glass trim and safety relief valve. See Figure 7.2 (Section 7), Figure 3.7 (float boilers) and cover photo (probe boilers).

b.For installations subject to UL726, a second operating control that senses steam pressure is required (not provided). Use a PA404A or equivalent. On probe boilers, install the additional pressure control opposite the standard PA404A using a cross instead of a tee along with a second brass siphon (not provided). On float boilers, install the additional pressure control in the 1/4" tapping on the top of the float low water cut-off using a vertical (360º) brass siphon (not provided).

c.For application of a probe low-water cut-off, use only Hydrolevel CG450. See Figure 7.2 (Section 7) for location. See also control manufacturers instruction sheet.

d.See Figure 3.7 for application of float low water cut-offs.

3.For complete information on servicing and adjustment of controls, refer to the attached control specification sheets.