Watts AERCO SmartPlate SP23 User Manual

SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8 – CORRECTIVE MAINTENANCE
OMM-0069_0H • SP-100 • 1/30/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 66 of 134
HEAT EXCHANGER CLEANING BY DISASSEMBLY Instructions
TABLE 8-2. Recommended Cleaning Procedures
TYPE OF
FOULING
CAUSE
CLEANING METHOD
CHEMICAL
CLEANING
NOTES
Incrustation
Scaling
(Lime
Deposits)
Calcium
Carbonate,
Calcium
Sulphate,
Silicates
1. Soft brush & running
water
NOTE: Avoid Gasket
Damage
2. High pressure hose.
3. Chemical cleaning
Nitric Acid
Sulfamic Acid
Citric Acid
Phosphoric Acid
Complex
Agents
(EDTA, NTA)
Sodium Poly-
phosphates
Maximum
concentration:
4%
Max. Temp:
140°F
Sediment
Corrosion
Products
Metal
Oxides
Silt
Alumina
1. Soft brush & running
water
NOTE: Avoid Gasket
Damage
2. High pressure hose.
3. Chemical cleaning
4. Addition of surfactants
can improve cleaning
effect
Nitric Acid
Sulfamic Acid
Citric Acid
Phosphoric Acid
Complex
Agents
(EDTA, NTA)
Sodium Poly-
phosphates
Maximum
concentration:
8%
Max. Temp:
140°F
11. Upon completion of the cleaning process, reinstall all plates and gaskets and close the
heat exchanger using the procedure in section 8.7.3.
8.7 DOUBLE-WALL HEAT EXCHANGER OPENING AND CLOSING
The following sections provide the instructions to open the Double-Wall heat exchanger,
remove/replace channel plates and close the heat exchanger.
WARNING!
THE UNIT MUST BE SHUT DOWN AND DRAINED PRIOR TO PERFORMING THE
PROCEDURES DESCRIBED IN SECTIONS 8.7.1 THROUGH 8.7.3 WHICH FOLLOW.

Watts AERCO SmartPlate SP23 Specifications

General

Brand	Watts
Model	AERCO SmartPlate SP23
Category	Water Heater
Language	English