Lochinvar EnergyRite ER202 Installation & Operation Manual page 35

7
Water connections
Figure 7-3_ Auxiliary Bypass Piping
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 14°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.
Automatic chlorinators
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.
High chemical concentrations from
CAUTION
improperly
chlorinators, or salt levels above 5000
ppm can cause rapid corrosion to the heat
exchanger.
(continued)
and chemical
adjusted feeders,
Installation & Operation Manual
Water chemistry
We recommend a periodic analysis be performed to maintain
and ensure proper operation of your pool heater (see Table 7B).
TABLE 7B
RECOMMENDED POOL CHEMISTRY LEVELS
Test
Bromine
Calcium Hardness
Cyanuric Acid
Free Chlorine
pH
Salt (residential pool)
Salt (commercial pool)
TDS
Total Alkalinity
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.
⚠ CAUTION Avoid contact with hot discharge water.
Recommended Level
2.0 - 4.0 ppm
200 - 400 ppm
50 - 75 ppm
1.0 - 3.0 ppm
7.4 - 7.6
3000 ppm
5000 ppm
300 - 1500 ppm
80 - 120 ppm
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