Operating Information - Lochinvar EnergyRite ER202 Installation & Operation Manual

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Operating information

General
How the pool heater operates
The EnergyRite uses a copper finned tube heat exchanger
and an electronic control module. The blower provides
both primary and secondary air to the burners and forces
the flue products out of the combustion chamber and into
the vent system. The combination gas valve both regulates
the manifold pressure and provides gas to the manifold,
which then supplies the burners. The control and gas
supply system is a fixed rate and only contains ON/OFF
operation.
How the control module operates
The EnergyRite control monitors the inlet sensor which is
indicative of pool/spa water temperature. The control will
begin an ignition sequence when the water temperature has
dropped below the set point minus the differential. It will
also monitor all safety circuits and will terminate or prevent
an ignition cycle if a safety circuit is open. In addition,
the control will monitor the outlet temperature and will
terminate a call for heat if the outlet temperature gets too
high.
Control inputs and outputs
Remote control
The remote control allows the remote operation of the
heater.
Temperature regulation
Operating temperature (pool/spa temperature)
The EnergyRite control module monitors inlet water
temperature and will initiate a call for heat to maintain the
desired pool/spa temperature. The operating temperature
is adjustable from 55°F to 104°F.
Outlet temperature
An outlet water sensor is used to monitor the outlet water
temperature. The outlet water temperature is created
by mixing the water temperature from the discharge of
the internal bypass and the water temperature from the
discharge of the heat exchanger.
temperature exceeds 135°F the control module will shut the
unit down until the water temperature drops below 120°F.
Protection features
High limit
A high limit device is used to monitor the water temperature at
the discharge of the heat exchanger. If the water temperature
exceeds 175°F the control module will shut the unit down
and display high limit open in the display until the water
temperature drops below 135°F.
Low water protection
A water pressure switch is used to monitor the water flow
through the heat exchanger. The switch is factory preset at 5 PSI
and will shut the unit down due to low water flow. The control
module will display low water flow in the display. The switch
is preset for normal installations at deck level. Installations
that are lower than deck level may require an adjustment of the
switch or the installation of an optional flow switch to protect
the unit from low water flow conditions.
Low air protection
A differential air pressure switch is used to monitor the
difference in air pressure between the front lower cabinet and
the negative pressure created by air flow through the burner.
Before the fan starts on a call for heat, the control module will
determine if the switch is in an open or closed position. If the
switch is in a closed position before the fan starts, the control
module will not start the fan and will show AIR SWITCH
SHORT in the display. If the switch is in an open position,
the control module will start the fan and will allow 20 seconds
for the switch to close. If the switch does not close within 20
seconds, the control module will show DISPLAY AIR SWITCH
OPEN in the display and go to post purge. The control module
will wait 5 minutes and will retry the ignition sequence unless
the MENU button is pressed. This sequence will continue for
as long as the switch is open.
Monitor external safeties
Proving switch
An external proving switch may be connected to the control
module. When a call for heat is initiated and the fan starts, the
control module will allow 65 seconds for the switch to close.
After 65 seconds, if the switch is not closed the control module
will show PROVING SWITCH in the display and go to post
purge. The control module will wait 5 minutes and will retry
If the outlet water
the ignition sequence. This sequence will continue for as long
as the switch is open.
Installation & Operation Manual
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