Lochinvar EnergyRite ER302 - Manual (Page 6)

Installation & Operation Manual
6
The EnergyRite - How it works...
1. Heat exchanger
Allows pool water to flow through specially designed
tubes for maximum heat transfer, while providing protection
against flue gas corrosion.
2. Blower
The blower provides air to mix with gas in the burners.
3. Gas valve
The gas valve is a single stage referencing valve. The valve senses
the chamber pressure and regulates gas flow based on that signal.
4. Outlet temperature sensor
This sensor monitors outlet water temperature and will shut
down the unit if this temperature gets too high.
5. Inlet temperature sensor
This sensor monitors the inlet water temperature and will be
used by the integrated control to determine whether an
ignition cycle should begin.
6. Electronic display
The electronic display consists of 4 buttons and a dual line
32-character liquid crystal display.
7. Burner
The burner is a stainless steel burner which accepts both gas
and air and mixes them. The number of burners in the unit
depends on the Btu input: 150,000 Btu/hr = 3;
199,999 Btu/hr = 4; 250,000 Btu/hr = 5; 300,000 Btu/hr = 6; and
399,999 Btu/hr = 8.
8. Water outlet (pool supply)
For a standard unit this is a 2" slip fit connection with
supplied union nuts and a starter pipe assembly. For an
ASME unit, see the ASME section of this manual.
9. Water inlet (pool return)
For a standard unit this is a 2" slip fit connection with
supplied union nuts and a starter pipe assembly. For an
ASME unit, see the ASME section of this manual.
10. Water pressure switch boot
The water pressure switch boot provides protection for the water
pressure switch.
11. Control Module
The control responds to internal and external signals
and controls the blower, and gas valve to meet the
heating demand.
12. High voltage junction box
The junction box contains the connection points for the line
voltage power.
13. Pool heater drain port (not shown)
Location from which the heat exchanger can be drained.
14. Low voltage terminal strip
The terminal strip is used to connect proving switch contacts and
a third party remote.
15. Ignition electrode
Provides direct spark for igniting the burner.
16. Flame inspection window
The quartz glass window provides a view of the burner
surface and flame.
17. High limit sensor
Device that monitors the outlet water temperature. If the
temperature exceeds 175°, it will break the control circuit, shutting
the pool heater down.
18. Flame sensor
Used by the control module to detect the presence of burner
flame.
19. Top panel
Removable panel to gain access to the internal components.
20. Power switch
Turns line power (120 or 240 VAC) ON/OFF to the pool heater.
21. Outdoor vent cap
An outdoor vent cap is mounted on the pool heater as shipped
from the factory.
22. Water pressure switch
The water pressure switch is a safety device that ensures the heat
exchanger is under pressure. If the water pressure in the heat
exchanger goes too low, it will break the control circuit, shutting
the pool heater down.
23. Air pressure switch
The air pressure switch is a safety device that ensures proper
blower performance through the heater before and during
operation. This device also detects blockages in the vent or air
piping.
24. 240 VAC - 120 VAC conversion
This appliance is wired for 240 VAC service. The pool heater can
be converted to 120 VAC by moving the jumper connector from
the connector labeled 240 VAC to the connector labeled 120 VAC.
25. Low gas pressure switch (ER252 - ER402 Models ONLY)
Ensures adequate gas pressure is provided to the pool heater.