Heat Exchanger Cleaning - Lochinvar EnergyRite ER252 Service Manual

2
Maintenance

Heat exchanger cleaning

Figure 2-4_Exploded View of the Heater
h) While burners are removed, check the heat
exchanger surface for sooting. If soot is present,
heat exchanger must be cleaned and problem
corrected. Proceed as follows:
i) Disconnect the connector from the combustion fan.
j) Disconnect the spark ignition wire from the back
of the control module.
k) Disconnect the flame rod wire from the back of
the control module.
l) Remove the screws around the combustion
chamber door. Remove the combustion chamber
door from the unit.
m) Remove soot from the heat exchanger with a stiff
bristle brush. Use a vacuum to remove loose soot
from surfaces and inner chamber.
NOTICE
Do not wet the pool heater's refractory.
n) Ensure that all burner ports are cleaned to remove
any soot. See the Burner Cleaning Procedure
section on page 16 of this manual.
o) Carefully reinstall the "V" baffles if removed from
the pool heater.
p) Reinstallation is the reverse of the installation
procedure. Use new gasket material to ensure a
proper air seal.
q) Reassemble all gas piping. Test for gas leaks.
r) Reassemble outer jacket panels.
s) Cycle the pool heater and check for proper
operation.
(continued)
2.
3.
4.
5.
6.
7.
Figure 2-5_Igniter Replacement
Combustion Air Fan: The combustion air fan should
be checked every 6 months or each season of operation.
Clean fan as required when installed in a dust or dirt
contaminated location.
Water Circulating Pump: Ensure that the filter system
pump is providing adequate flow to the pool heater.
Backwash and clean filter as required to maintain
proper flow.
Keep the pool heater area clear and free from
combustible materials, gasoline, and other flammable
vapors and liquids.
Check frequently to be sure the flow of combustion and
ventilation air to the pool heater is not obstructed.
This pool heater uses a transformer to supply a low
voltage control circuit. The voltage on the secondary
side should be 24 to 28 VAC when measured with a
voltmeter.
Direct Spark Igniter Replacement:
igniter can be replaced with an OEM igniter available
from your dealer.
a) Turn off main power to the pool heater.
b) Turn off main manual gas shutoff to the pool heater.
c) Remove the front outer jacket panels to access the
front chamber.
d) Disconnect the rajah connector from the igniter
(FIG. 2-5).
e) Remove the igniter retaining screws and slide the
igniter out of the combustion chamber.
f) Install the new igniter into the combustion chamber.
g) Reattach the rajah connector to the new igniter.
h) Reassemble in reverse order.
Service Manual
The direct spark
17