Bock Water heaters EZ 100-199, Инструкция по установке и эксплуатации

Страница: 8 / 40

Page 8 Atmospheric Gas
TEMPERATURE CONTROL MODULE
Your Bock water heater is equipped with an electronic temperature control with many ad-
vanced features. The temperature control is located in the control enclosure along with the
burner ignition module. This temperature control uses two probes to measure the average
water temperature in the tank. One probe located near the tank bottom senses temperature
and has a two wire harness. The other probe located near the top of the heater contains a tem-
perature sensor and a high limit electronic cut out (ECO). This control also has 4 LED’s that in-
dicate the operating condition. A green LED indicates that power is being delivered to the
control. A series of red LED’s indicates a call for heat, a high limit (ECO) cut out and reset sta-
tus. The control requires a manual reset if the water temperature exceeds the ECO setting of
200°F. A gray button in the upper right hand corner of the control above the power supply is
the manual reset. Temperature is adjusted with a large black dial on the face of the control.
Temperature settings are marked in white on the dial. The temperature range of this control is
120°F to 180°F.
CONNECT THE ELECTRICITY
Your Bock water heater uses 120VAC, 60Hz line voltage. Total current load is less than 12
amps. This appliance must be electrically grounded and comply with all local codes. In the ab-
sence of local codes all wiring must conform with ANSI/NFPA 70—
most recent edition . Electri-
cal power to this appliance should be supplied through a fused disconnect switch located on
or near the water heater. A metal junction box is located in the control enclosure (with a pre-
wired power cord) and may also serve as a location for a fused disconnect switch. Observe cor-
rect polarity when connecting this water heater to the power supply. Line voltage is supplied
to the temperature control module from the junction box. The temperature control module
supplies 24VAC power to the gas valve, burner control module and flue damper. See Figures 5
and 6 for wiring diagrams.
WIRING DIAGRAM
Figure 5: Connection Diagram
Figure 6: Schematic (Ladder) Diagram