Aerco SmartPlate User Manual download pdf (Page 86)

SmartPlate Installation, Operation & Maintenance Manual

CHAPTER 8 – CORRECTIVE MAINTENANCE

Page 86 of 138 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0069_0E

PRI: 11/26/2013 Phone: 800-526-0288 SP-100

4. After all Control Box cables have been disconnected, remove the four mounting screws

securing the bottom of the Control Box to the mounting bracket. Completely remove the

Control Box from the SmartPlate Water Heater.

5. Control Box replacement is accomplished by reversing the previous steps.

8.15 TEMPERATURE CONTROLLER REPLACEMENT

The Temperature Controller is located on the recessed panel behind the Control Box door as

shown in Figure 4-4. Removal and replacement is accomplished as follows:

1. Switch power off and open the Control Box door to access the Temperature Controller.

2. The Temperature Controller is installed in a sleeve as shown in Figure 8-26. To unplug

and remove the Controller from its sleeve, simply pry the latching ears outward and pull

the Controller out of the panel.

3. To install a replacement Temperature Controller, simply slide it into the front panel sleeve

until the latching ears click into place. Following replacement, switch power on adjust the

setpoint temperature to the required value using the Adjustment procedures in Chapter 4.

4. Close and secure Control Box front door.

Figure 8-26. Temperature Controller Installation

8.16 OVER-TEMPERATURE SWITCH AND TEMPERATURE INDICATORS

The Over-Temperature Switch and Temperature Indicators are actually identical devices,

however they perform different functions. As the name implies, the Over-Temperature Switch,

performs a switching function and generates an alarm when the preset temperature limit is

exceeded. However, the Temperature Indicators are Indicator-Only devices and are not factory

wired to perform any switching functions. The locations of the Over-Temperature Switch and

Temperature Indicator are shown in Figure 4-4. Removal and replacement for each device are

performed using the following identical steps:

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Aerco SmartPlate User Manual Page 86