AERCO SmartPlate - Manual (Page 57)

SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8 – CORRECTIVE MAINTENANCE
OMM-0069_0E AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 Page 57 of 138
SP-100 Phone: 800-526-0288 PRI: 11/26/2013
CHAPTER 8. CORRECTIVE MAINTENANCE
8.1 INTRODUCTION
This Chapter provides the procedures necessary to correct and repair faults detected during
operation or isolated during troubleshooting of the SmartPlate Water Heater. The procedures in
this Chapter are divided into four sections as follows:
 Section I - SmartPlate Single-Wall Heat Exchanger Models: Single-Wall Heat exchangers
do not include any serviceable assemblies and components. Therefore, the procedures in
this section are limited to heat exchanger cleaning (de-scaling) removal and replacement.
 Section II – Double-Wall Heat Exchanger Corrective Maintenance. This section provides
cleaning and corrective maintenance procedures for serviceable internal components of
the double-wall heat exchanger.
 Section III – SmartPlate Wetted Components - All Models. This section provides
corrective maintenance for major assemblies and components which come in contact with
boiler water or domestic hot water during SmartPlate operation. These assemblies and
components are used on all SmartPlate Models (Single-Wall and Double-Wall).
 Section IV – SmartPlate Electronic Control System (ECS/SP). This section provides
removal and replacement procedures for the internally mounted assemblies and
components contained in the ECS/SP Control Box.
SECTION I SMARTPLATE SINGLE-WALL HEAT EXCHANGER MODELS
8.2 SINGLE WALL HEAT EXCHANGER MAINTENANCE
Since the Single-Wall Heat Exchanger does not contain any serviceable items, the procedures
in this section are limited to cleaning (de-scaling) and removal/replacement. These procedures
are provided in paragraphs 8.3 and 8.4 which follow.
8.3 HEAT EXCHANGER CLEANING & DE-SCALING
Heat Exchanger cleaning and de-scaling is accomplished "in-place" using the following
procedure:
NOTE
The "in-place" cleaning and de-scaling procedure described below
can also be used for Double-Wall Heat Exchangers (Section II)
which are not clogged with hardened scale deposits.
1. Set the POWER Switch on the ECS/SP Control Box to the OFF position to stop the
Recirculation Pump.
2. Close all four SmartPlate Heater Isolation Ball Valves (Figure 8-1).
3. Connect a hose to the Drain Valve near the DHW Outlet.
4. Remove the 1” NPT Air Vent from the top of the Manifold.