Lochinvar EnergyRite ER302 - Manual (Page 50)

Relief valve
A pressure relief valve is installed in the vertical position and
mounted in the front header on the hot water outlet of the pool
heater. No valve is to be placed between the relief valve and the
unit. To prevent water damage, the discharge from the relief
valve shall be piped to a suitable floor drain for disposal when
relief occurs. No reducing couplings or other restrictions shall
be installed in the discharge line. The discharge line shall allow
complete drainage of the valve and line. Relief valves should be
manually operated at least once a year.
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11
ASME addendum
Installation & Operation Manual
Adjustment of auxiliary bypass
1. Backwash and clean pool filters.
2. Start with the bypass valve in the half open position.
3. Start the pool heater.
4. Check the temperature rise across the pool heater
(reference the Menu Descriptions - Delta T section of
the EnergyRite Service Manual).
5. If the temperature rise across the pool heater is more
than 15°F, close the bypass valve to increase flow to the
pool heater. If the temperature rise across the pool
heater is less than 10°F, open the valve to decrease flow
to the pool heater.
6. High water flow can cause condensate and operational
problems which are non-warrantable.
Figure 11-3_ Pressure Relief Valve