TriangleTube Marquis TWH180, Installation Manual

Page: 21 / 39

Water Piping
18
Pressure Relief Valve
• A pressure relief valve must be installed. Observe
the following. Failure to comply with the guidelines
on installing the pressure relief valve and discharge
piping can result in personal injury, death or sub-
stantial property damage.
• DO NOT install a relief valve with pressure higher
than 150psi. This is the maximum allowable relief
valve setting for the water heater.
• Test the operation of the valve after filling and pres-
surizing system by lifting the lever.
• Make sure the valve discharges freely. If the valve
fails to operate correctly, replace it with a new relief
valve.
• An approved ASME HV Valve must be installed on
the DHW supply line for hydronic domestic hot water
loop as close to the unit as possible.(Valve size 3/4˝,
maximum 150psi)
• This appliance has a high-temperature shut off
switch built in as a standard safety feature there-
fore a ˝pressure only˝ relief valve is required.
• Direct the discharge piping of the pressure relief
valve so that hot water will not splash on anyone or
any nearby equipment. Attach the discharge line to
the pressure relief valve and run the end of the line
to a suitable drain.
• No other valve should be placed between the pres-
sure relief valve.
Condensate Drain
• The Water Heater creates condensate when it is
operating.
• Condensate has acidic (pH) of approximately 3~4.
• Condensate must be drained in accordance with all
local regulations.
Follow your local code with regards to the disposal of
condensate.
• If a neutralizer is installed, periodic replacement of
the limestone will be required. The rate of depletion
of the limestone varies upon usage of the Water
Heater.
• During the first year of operation, check the neutral-
izer every few months for depletion.
• Apply only corrosion-resistant materials for the con-
densate drain lines such as PVC, CPVC,
Polypropylene pipe or included plastic hose.
Marquis Manual_61515_Water Heater 7/1/15 1:58 PM Page 21