Bradford White VR-1000-(kW), Инструкция по установке и обслуживанию

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HIGH WATER PRESSURE SWITCH (OPTIONAL):
A high water pressure switch is available as an option on this water heater. A water pressure switch is used to
monitor the water pressure in the water heater storage tank. If the water pressure rises above an adjustable set
point, the control circuit is opened and operation of the water heater is shut down. The low water pressure
switch may be specified with either an auto-reset function or a manual reset function on high water pressure.
MANUAL LIMITING SWITCHES (OPTIONAL):
As an option, a switch or multiple switches may be provided to interrupt the 120 VAC control circuit feed
to the contactor coil or coils from the immersion heating thermostat(s). This switch may be used to
manually turn off a portion of the heating element input. This feature may be used to reduce electrical input
of the water heater in the summer months when ground water temperatures are warmer and full electrical
input from the immersion heating elements is not required. The water heater may be restored to full
input by moving the switches to the "ON" position.
TIME CLOCK (OPTIONAL):
The water heater may be provided with an optional time clock. The time clock
will allow the water heater to be turned on and off with a pre-set schedule. The
time clock may be specified with a 24 hour scheduling period or with a 7 day
scheduling period. By the adjustment of the set points on the time clock, the
water heater may be turned off when hot water is not needed or in periods
when the building may not be occupied. The time clock allows the water
heater to automatically cycle on in advance of the time when hot water may be
needed. This will insure that hot water is always available yet save energy
when there are scheduled periods when there will be no requirement for hot
water. This feature is especially useful for schools and buildings that are
occupied on a fixed schedule. As an additional feature, time clocks may be
furnished with a spring wound carry-over function to insure that a switching schedule is maintained in
periods where there may be power interruptions. The time clock works by making and breaking the 120
VAC control circuit to the contactor coils to shut down operation of the heating elements in the desired time
periods.
PILOT LIGHTS (OPTIONAL):
The water heater may be provided with optional pilot lights to provide an external indicator for each
contactor or stage of heating elements that is energized. Each pilot light is wired in parallel with the 120
VAC control circuit feed to the contactor coil(s). The pilot will be turned on as the contactor coil(s) is
energized by the temperature controls.
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