3029-005B Section 5: Plumbing
Concordia Integra Technical Support Manual 5-7
2500-255B
Pressure Relief Valve
175psi Pressure Relief Valve
The pressure relief valve functions as a safety relief valve.
If the pressure in the water tank exceeds 175psi, the pressure
relief valve opens to release excess pressure. A drain hose is
routed from the pressure relief valve to the drain tray.
Temperature/Level Probe
The temperature probe and level probe are a single unit.
Level Probe
The CPU uses the level probe to verify the presence of water in
the tank. To verify the presence of water, a pulsed 300mv
signal is sent to the probe. The presence of water in the tank
will cause the signal to shunt to ground. When the signal is
grounded the CPU knows the tank has water and this allows the
CPU to activate the heater (if needed).
If the signal is not shunted to ground, the CPU cannot activate
the heater. If the level probe fails to detect water in the tank
for a period of 60 seconds or more, the message CHK WATER
SUPPLY is displayed.
If the water level in the tank is low and the circuit is open, the
CPU activates the brew water valve, allowing line pressure to fill
the tank.
When the circuit is
open and the CPU
detects low water, the
brew water valve
opens and allows
water into the tank.
The heating elements
are then inhibited.
Water Tank and Level Probe Grounded
Water Tank and Level Probe Not Grounded
When the signal from
the probe finds
ground, the CPU
assumes water is
present in the tank.
To Next Page
