Mod Con MODCON500, Руководство по установке

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LP-446-r4 Rev. 10.12.16
15
A. General Plumbing Information
Use two wrenches when tightening water piping at boiler. Use
one wrench to prevent the boiler return or supply line from
turning. Failure to prevent piping connections from turning
could cause damage to boiler components.
The building piping system must meet or exceed the the piping
requirements in this manual.
NOTE: The addition of a high temperature limiting device is
important if the boiler is to be connected to a domestic hot
water system.
Connect the cold water supply to both the storage bottom
port and the supply side of the boiler (shown in Applications,
this manual). It is important that you install a flow check on
the supply line of the boiler BEFORE connecting the feed line
to the storage tank. This allows the cold feed to flow through
the storage tank first. It is recommended that you install shut
off valves on the cold feed line for future ease of service. If there
is a back flow preventer or any type of no return valve in the
system, then you must install an additional tee for a suitable
potable hot water expansion tank. Connect the storage tank
return line to the return connection located on the boiler (shown
in Applications, this manual). Then connect the storage tank hot
water outlet to the hot water plumbing lines.
C. Backflow Preventer
Use a backflow preventer specifically designed for boiler
installations. This valve should be installed on the cold water
fill supply line per local codes.
D. Potable Expansion Tank
A potable hot water expansion tank is required to offset
heated water expansion. In most city plumbing systems, the
water meter has a no return or back flow device built into
the system to prevent back flowing of water into city mains.
Some local codes require back flow preventers on all incoming
water supplies. The hot water expansion tank must be listed
B. Relief Valve
To avoid water damage or scalding due to relief valve operation:
• Discharge line must be connected to relief valve outlet
and run to a safe place of disposal. Terminate the
discharge line in a manner that will prevent possibility of
severe burns or property damage should the relief valve
discharge.
• Discharge line must be as short as possible and the same
size as the valve discharge connection throughout its
Plumbing of this product should only be done by a qualified,
licensed plumber in accordance with all local plumbing codes.
The boiler is designed to be connected to a storage tank to supply
domestic hot water. HTP offers 119 and 175 gallon size storage
tanks in either stainless steel or glass-lined construction. These
storage tanks will be directly connected to the boiler supply and
return connection.
Connect discharge piping to a safe disposal location following
the guidelines below.
entire length.
• Discharge line must pitch downward from the valve
and terminate at least 6” above the floor drain, making
discharge clearly visible.
• The discharge line shall terminate plain, not threaded,
with a material serviceable for temperatures of 375
o F
or greater.
• Do not pipe discharge to any location where freezing
could occur.
• No valve may be installed between the relief valve and
boiler or in the discharge line. Do not plug or place any
obstruction in the discharge line.
• Test the operation of the relief valve after filling and
pressurizing the system by lifting the lever. Make sure
the valve discharges freely. If the valve fails to operate
correctly, immediately replace with a new properly
rated relief valve.
• Test T&P valve at least once annually to ensure the
waterway is clear. If valve does not operate, turn the
boiler “off” and call a plumber immediately.
• Take care whenever operating relief valve to avoid
scalding injury or property damage.
FAILURE TO COMPLY WITH THE ABOVE GUIDELINES
COULD RESULT IN FAILURE OF RELIEF VALVE OPERATION,
RESULTING IN POSSIBILITY OF SUBSTANTIAL PROPERTY
DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.
RE-INSPECTION OF T&P RELIEF VALVES: T&P valves
should be inspected AT LEAST ONCE EVERY THREE
YEARS, and replaced if necessary,
by a licensed plumbing
contractor or qualified service technician to ensure that the
product has not been affected by corrosive water conditions
and to ensure that the valve and discharge line have not been
altered or tampered with illegally. Certain naturally occuring
conditions may corrode the valve and its components over
time, rendering the valve inoperative. Such conditions can
only be detected if the valve and its components are physically
removed and inspected.
Do not attempt to conduct an
inspection on your own. Contact your plumbing contractor
for a re-inspection to assure continued safety.
Do not thread a cap or plug into the relief valve or relief
valve line under any circumstances! Explosion and property
damage, serious injury, or death may result.
FAILURE TO RE-INSPECT THE T&P VALVE AS DIRECTED
COULD RESULT IN UNSAFE TEMPERATURE AND/OR
PRESSURE BUILD-UP WHICH CAN RESULT IN PROPERTY
DAMAGE, SERIOUS PERSONAL INJURY, OR DEATH.
VWH units must be connected to a storage tank. Failure to
connect the VWH boiler to a storage tank of the minimum size
requirements (119 gallons for a single 500VWH; 175 gallons
for a single 700/850VWH) will result in property damage and/
or premature boiler failure. Damages resulting from incorrect
installation or from use of products not approved by HTP, Inc.
ARE NOT covered by warranty.
The control module uses temperature sensors to provide both
high limit protection and modulating temperature control. The
control module also provides low water protection by sensing
the water level in the heat exchanger. Some codes/jurisdictions
may require additional external controls..