Seisco SC70, Owner'S Manual, Page: 9 / 20

SC-­‐OM-­‐V614 6
TEMPERATURE & PRESSURE RELIEF VALVES
Neither Seisco nor the national code requires a combination temperature and pressure relief
valve for this appliance, however local codes may require it. HOWEVER, WHEN INSTALLING
THE SEISCO IN ANY AREA THAT IS NOT READILY VISIBLE OR ROUTINELY MONITORED
INCLUDING CLOSETS, CABINETS, ATTICS OR ANY OTHER AREAS WHERE LEAKS OF ANY
NATURE COULD CAUSE PROPERTY DAMAGE, A 150-­‐PSI MAXIMUM PRESSURE RELIEF
VALVE WITH DRAIN LINE
IS REQUIRED.
•
The discharge from the temperature and/or pressure relief valve should be piped to the
ground or into a drain system to prevent exposure or possible burn hazards to humans or
other plant or animal life. Follow local codes. Water discharged from the relief valve could
cause severe burns instantly, scalds, or death.
•
The temperature and/or pressure relief valve must be manually operated once a year to
check for correct operation.
•
The temperature and/or pressure relief valve should be added to the hot water outlet line
according to the manufacturer’s instructions. DO NOT place any other type valve or shut
off device between the relief valve and the water heater.
•
Do not plug the temperature and/or pressure relief valve and do not install any reducing
fittings or other restrictions in the relief line. The relief line should allow for complete
drainage of the valve and the line.
•
If a temperature and/or pressure relief valve discharges periodically, this may be due to
thermal expansion in a closed water supply system. Contact the water supplier or local
plumbing inspector on how to correct this situation. Do not plug the relief valve.
DRAIN PAN
The Seisco heater must be located in an area where water leakage of the unit or connections will
not result in damage to the area adjacent to the appliance or to lower floors of the structure.
When such locations cannot be avoided, it is
required that a suitable drain pan, adequately
drained, be installed under the appliance. A splash cover must be included to protect the area of
attachment to the wall. The pan must be large enough to protect the area below the heater and
must be piped to a suitable drain with the complete drain pan/splash cover/pipe/drain
combination sufficient to contain the full flow of the supply line in the event of a leak and
sufficient to prevent any property damage.