Lochinvar EnergyRite ER302 - Manual (Page 35)

Installation & Operation Manual
7
Water connections
(continued)
35
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 20°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.
CAUTION
High chemical concentrations from
improperly adjusted feeders and
chlorinators can cause rapid corrosion to
the heat exchanger. This damage is non-
warrantable.
Relief valve
An optional pressure relief valve may be field installed in the
front header if required by local codes. Remove the 3/4" NPT
plug in the outlet side of the front header. The relief valve
should be properly sized based on local code requirements.
In the absence of local code requirements, the relief valve
should be sized in accordance with ASME Boiler and
Pressure Vessel Code, Section IV (“Heating Boilers”). The
relief valve is installed in the vertical position and mounted
in the front header on the hot water outlet side 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.
A pressure relief valve is offered as standard equipment on all
ASME units; see the ASME Addendum section in this
manual.
ƽ CAUTION Avoid contact with hot discharge water.
Figure 7-3_ Auxiliary Bypass Piping
Automatic chlorinators and chemical
feeders
All chemicals must be diluted into the pool or spa water
before they are circulated through the pool heater. Any
concentration of chlorine in the pool heater can cause
damage to the unit. Do not place chlorine tablets or bromine
sticks in the skimmer. High chemical concentrations will
result when the pump is not running.
Chlorinators must feed downstream of the pool heater and
have an anti-siphoning device to prevent chemical back-up in
the heater when the pump is shut off.