The Armor X2 Water Heater - How It Works - Lochinvar Armor X2 AWN1000 Installation & Operation Manual

The Armor X2 Water Heater - How it works...

1. Access cover - front
Provides access to the gas train and the heat exchanger.
2. Air intake adapter
Allows for the connection of the PVC air intake pipe to the
water heater.
3. Air pressure switches
The air pressure switches detect blocked flue/vent conditions.
4. Air shrouds (1.0 Model only)
The air shrouds control air and gas flow into the burners.
5. Automatic air vents
Designed to remove trapped air from the heat exchanger
coils.
6. Blowers
The blowers pull in air and gas through the venturis (item
36). Air and gas mix inside the blowers and are pushed into the
burners, where they burn inside the combustion chamber.
7. Water heater drain port
Location from which the heat exchangers can be drained.
8. Water heater inlet temperature sensors
These sensors monitor inlet water temperature.
9. Water heater outlet temperature sensors
These sensors monitor water heater outlet water temperature.
10. Burners (not shown)
Made with metal fiber and stainless steel construction,
the burners use pre-mixed air and gas and provide a
wide range of firing rates.
11. Condensate drain connection
Connects the condensate drain line to a 1/2" PVC union.
12. Control modules
The control modules respond to internal and external signals
and control the blowers, gas valves, and pumps to meet the
heating demand.
13. Electronic display
Digital controls with touch screen technology and full color
display.
14. Flame inspection windows
The quartz glass windows provide a view of the burner
surfaces and flames.
15. Flame sensors
Used by the control module to detect the presence of burner
flame.
16. Flap valves
Prevents recirculation of flue products when only one burner is
running.
17. Flue gas sensors
These sensors monitor the flue gas exit temperature. The
control modules will modulate and shut down the water heater
if the flue gas temperature gets too hot. This protects the flue
pipe from overheating.
18. Flue pipe adapter
Allows for the connection of the PVC vent pipe system to the
water heater.
19. Gas connection pipe
Threaded 1½" pipe connection.
connected to the incoming gas supply for the purpose of
delivering gas to the water heater.
20. Gas shutoff valves (inside unit)
Manual valves used to isolate the gas valves from the burners.
21. Gas shutoff valve (outside unit)
Manual valve used to isolate the gas valve from the gas supply.
22. Gas valves
The gas valves sense the negative pressure created by the
blowers, allowing gas to flow only if the gas valves are
powered and combustion air is flowing.
4
23. Heat exchanger access covers
24. High limits
25. Ignition electrodes
26. Line voltage junction box
27. Line voltage wiring connections (knockouts)
28. Low voltage connection board
29. Low voltage wiring connections (knockouts)
30. Power switch
31. Pump relay board
32. Relief valve
33. Stainless steel heat exchangers
34. Temperature and pressure gauge
35. Top panel
36. Venturis
37. Water inlets
38. Water outlets
39. O-temp switch (located underneath access cover)
40. Flow switch
This pipe should be
41. Limiting thermostat
Installation & Operation Manual
Allows access to the combustion
exchanger coils.
Devices used to monitor the outlet water temperature.
temperature exceeds its setting, they will break the control
circuit, shutting the water heater down.
Provides direct spark for igniting the burners.
The junction box contains the connection points for the line
voltage power and all pumps.
Conduit connection points for the high voltage junction box.
The connection board is used to connect external low voltage
devices.
Conduit connection points for the low voltage connection board.
Turns 120 VAC ON/OFF to the heater.
The pump relay board is used to control the HW pumps.
Protects the heat exchangers from an over pressure condition.
The relief valve will be set at 150 PSI and 210°F.
Allows system water to flow through specially designed coils for
maximum heat transfer, while providing protection against flue
gas corrosion. The coils are encased in a jacket that contains the
combustion process.
Monitors the outlet temperature of the water heater as well as the
system water pressure.
Removable panel to gain access to the internal components.
The venturis control air and gas flow into the burners.
Two 2" NPT water connections that return water from the
system to the heat exchangers.
A 3" NPT stainless steel water connection that supplies hot water to
the system.
An electrical switch designed to shut down water heater operation in
the event the outer back of the heat exchanger, directly above the
flue connection does not exceed 604°F (318°C). This is a one time
switch and could warrant a heat exchanger replacement. Check
the integrity of the rear refractory at the back of the upper coil if
the switch opens.
The flow switch is a safety device that ensures flow through the
heat exchanger during operation. This appliance is low mass
and should never be operated without flow. The flow switch makes
contact when flow is detected and allows the unit to operate. If flow
is discontinued during operation for any reason the flow switch will
break the control circuit and the unit will shut down.
The limiting thermostat is used to prevent the outlet water of the
heat exchangers from exceeding 190°F.
side of the heat
If the