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IX. Hydronic Piping (continued)
E. Standard Piping Components
1. Safety Relief Valve (Required)
The AMP Boiler is shipped with an installed
pressure relief valve.
a. The safety relief valve must be installed with
spindle in vertical position. Installation of the
safety relief valve must comply with ASME Boiler
and Pressure Vessel Code, Section IV. For standard
and optional safety relief valve for specific boiler
model refer to Table 2.
b. If the safety relief valve is to be replaced, the
replacement valve must have a relief capacity
equal or exceeding the minimum relief valve
capacity shown on the heat exchanger ASME
plate. Also, when replacing the safety relief valve,
verify the temperature and pressure gauge meets
ASME requirements for the replacement safety
relief valve.
c. Pipe the safety relief valve discharge to a location
where hot water or steam will not create hazard
or property damage if the valve discharges. The
end of the discharge pipe must terminate in an
untreated pipe.
d. If the safety relief valve is not piped to a drain,
it must terminate at least 6 in. (150mm) above
the floor. Do not run safety relief valve discharge
pipe through an area prone to freezing. The
termination of discharge piping must be in an
area where it will not became plugged by debris.
2. Drain Valves
A factory installed 3/4" NPT drain valve and
connection is provided with the unit.
3. Flow Switch (Factory Supplied)
This appliance is CSD-1 compliant and equipped
with water flow switch and reset low water cut out
box. A flow switch is required for forced circulation
coil-type water boilers to prevent overheating
and the heat exchanger failure in accordance with
requirements of ASME Boiler and Pressure Vessel
Code, Section IV, and ANSI/ASME CSD-1 "Controls
and Safety Devices for Automatically Fired Boilers".
4. Circulator
Near boiler pump is required to maintain minimum
flow requirements for proper operation of the
boiler. It is the responsibility of the installer to size
and install near boiler pump(s). Refer to Table 20
for boiler specific head losses.
!
Burn Hazard. Safety relief valve discharge shall
be piped in such a way to prevent or eliminate
potential burn risk.
DO NOT pipe in any area where freezing could
occur.
DO NOT install any shut-off valves, plugs, caps, or
reducers in the discharge piping.
Discharge line shall be installed to allow complete
drainage of both the valve and the line.
Consult local codes for proper discharge pipe
arrangement.
Observe a minimum of 1/2 inch (12 mm) clearance
around all uninsulated hot water piping.
5. Expansion Tank (Required)
If this appliance is replacing an existing appliance
with no other changes in the system, the old
expansion tank can generally be reused. If the
expansion tank must be replaced, consult the
expansion tank manufacturer's literature for proper
sizing.
6. Fill Valve (Required)
Either manual (recommended) or automatic fill
valve may be used. However, if automatic refill
is employed, a water meter must be added to
evaluate the makeup water volume taken after
initial fill and eliminate any water leakage as early
as possible.
7. Automatic Air Vent (Required)
At least one automatic air vent is required. Manual
vents will usually be required in other parts of the
system to remove air during initial fill.
8. Y-strainer (Recommended)
A Y-strainer or equivalent strainer removes heating
system debris from the hydronic systems and
protects the heat exchanger. Install the strainer in
the cold water connection piping between the tank
and the appliance.
9. Isolation Valves (Recommended)
Isolation valves are useful for servicing and stopping
water flow in the case of failure. Full port ball valves
are required.
41
WARNING
WARNING
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