Table of Contents
Advertisement
8. INSTALL CONTROLS, TRIM & WIRING
A. INSTALL SAFETY VALVES
1. Pipe the Pop Safety Valve on a tee mounted in the
2¹⁄₂" tapping located on the upper left side of the
Rear Section. Make sure the relief valve sizing meets
local code requirements.
CAUTION
Pipe the discharge of the Safety Relief Valve away
from any traffic area, preferably to a floor drain. This
is necessary to prevent injury should the valve
discharge.
Pipe the discharge full size of valve outlet.
2. Install a 2" ball valve for skimming off the end of the
tee as shown in the piping drawings in this manual.
B. INSTALL BLOWDOWN VALVES
1. Install a 1¹⁄₂" full port ball valve off of the return
connection as shown in the "Pipe the Boiler" section
of this manual. See Figure 8.1.
2. Pipe the valve discharge to a floor drain if available
or apply a nipple and cap to close off when not in
use.
C. INSTALL LOW WATER CUTOFF(S)
1. Mount a float type Low Water Cutoff and Gauge
Glass in the tappings provided in the side of the front
section or the side and top of the first intermediate
section.
2. Do not apply piping which would raise or lower the
location of the cutoff relative to the tappings in the
boiler. Raising the water level over the design height
will cause water carryover to the system.
3. For correct location of typical low water cutoff/feeder
or low water cutoff/pump control, see Figures 8.4
through 8.7.
4. See Figure 8.2 for the location of control connection
tappings.
5. Provide each float low water cutoff with a blowdown
valve. Pipe the blowdown away from traffic to a floor
drain if available. The blowdown valve is required
for proper maintenance of the control.
6. Maintain a height of 46¹⁄₂" from boiler foundation to
the normal water level.
7. When using Multiple Float Type Controls: Always
pipe the controls off of the same tappings to the
boiler. Do not mount on different ends of the boiler
or in different tappings. This can cause erratic
operation and nuisance problems with the controls.
INSTALL CONTROLS, TRIM & WIRING
D. INSTALL PRESSURE CONTROLS
1. Pipe the Steam Pressure Gauge and Boiler Limit and
Operating Pressure Controls as shown in Figure 8.3.
Connect the control assembly to the 1/2" tapping in
the front section.
CAUTION
Make sure that the ignition system components,
electrical controls, junction boxes and electrical
panels are protected from water (dripping, spraying,
rain, etc.) during boiler operation and service (trap
servicing, control replacements or other).
E. PIPE TANKLESS HEATER(S)
1. Connect piping to any installed tankless heaters. See
Figure 8.8 for suggested piping for single coils and
Figure 8.9 for suggested piping for dual coils.
F.
CONNECT SUPPLY WIRING
1. Install all wiring in accordance with local codes, the
National Electrical Code and other controlling
agencies or governing bodies.
NOTICE
The boiler/burner must be electrically grounded in
accordance with the requirements of the authority
having jurisdiction, or in the absence of such
requirements, with the current edition of the National
Electrical Code, ANSI/NFPA Number 70.
2. Use #14 gauge or heavier wire for supply wiring.
Protect the circuit with a fused disconnect switch (by
others) and a grounded neutral.
3. Mount an electrical junction box on the boiler Front
Panel for connection of supply wiring and
distribution to the boiler controls.
4. Follow the instructions in the Burner Manual and the
Wiring Diagrams supplied with the burner and the
boiler.
31
Advertisement
Table of Contents
