Section 9, Operation
9-6 Installation Manual for Oasis
®
SCH33™ Heating System
Turning the mixing valve knob clockwise will decrease the hot
water outlet temperature and turning the knob counter-
clockwise will increase the temperature.
The mixing valve will compensate for temperature variations of
incoming supply water and maintain the temperature at which
it is set. However, in some cases, the temperature of the
incoming water and the flow-rate demand of multiple faucets
may limit the ability of the Oasis SCH33 to provide hot water at
the temperature setting of the mixing valve, even if the mixing
valve is set to its maximum. This is a normal operating
characteristic of any on-demand, continuous hot water system
that does not rely on heat retained within a stored volume of
water. In this situation the temperature of the hot water may
be increased by lowering the flow at the faucet and shower
head.
9.10 Stopping the Heater (for
Maintenance)
To shut down the heater totally, for maintenance purposes:
1. Turn OFF, the service switch on the electronic control box.
2. Wait until the heater has completed the purge cycle and turned
OFF.
3. Disconnect the power supply.
9.11 Resetting a Fault
When a fault occurs and has been identified and corrected, the
system can be reset by switching the service switch on the side of
the main control box or the remote control switch OFF, then ON
again. This will reset the fault and the diagnostic code.
Note: Component faults can only be reset using the service switch.
9.12 Electrical Noise
Noise is an unwanted electrical signal, which produces undesirable
effects in the electronic circuits of the control system and we must
be aware of techniques to minimize the electrical noise on these
controllers. The majority of problems stem from crude wiring
practices and techniques, which allow "coupling" or the transfer of
electrical noise into the control circuit from the noise source.
A common symptom is the system behaves erratically, that is,
evidence of a problem does not appear consistently. Even worse, it
may give several different indications of a problem. Low power level
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