Instructions / Assembly

LP-387 Rev. 011 Rel. 006 Date 6.28.19
16
Part 4 - Piping
Failure to follow the instructions in this section WILL VOID the
warranty and may result in property damage, severe personal injury,
or death.
Dielectric unions or galvanized steel ttings must not be used in a
system with this boiler. Doing so WILL VOID the warranty. Use only
copper, brass, or stainless steel ttings. Teon thread sealant must be
used on all connections.
The National Standard Plumbing Code, the National Plumbing Code
of Canada, and the Uniform Plumbing Code limit heat transfer uid
pressure to less than the minimum working pressure of the potable
water system up to 30 PSI maximum. In addition, the heat transfer
uid must be water or another non-toxic uid having a toxicity of
Class 1, as listed in Clinical Toxicology of Commercial Products,
5th Edition. Failure to follow this warning could result in property
damage, severe personal injury, or death.
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.
C. Backow Preventer
Use a backow preventer specically designed for hydronic boiler
installations. This valve should be installed on the cold water ll
supply line per local codes.
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
entire length.
• Discharge line must pitch downward from the valve
and terminate at least 6” above the oor 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 lling 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 “o” 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.
Plumbing of this product should only be done by a qualied, licensed
plumber in accordance with all local plumbing codes. The boiler may
be connected to an indirect water heater to supply domestic hot
water. HTP oers indirect water heaters in a wide range of gallon sizes
in either stainless steel or glass-lined construction.
Connect discharge piping to a safe disposal location following the
guidelines below.
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 qualied service
technician to ensure that the product has not been aected 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.
The control module uses temperature sensors to provide both
high limit protection and modulating temperature control. The
control module may also provide low water protection (through the
addition of an optional kit) by sensing the water level in the heat
exchanger. An optional ow switch may be installed on the supply
of the system to activate the boiler when there is enough ow. Some
codes/jurisdictions may require additional external controls.