Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS User Manual download pdf (Page 48)

Commercial Pool Heaters

CLEANING AND

MAINTENANCE Continued

Burner Removal and Cleaning

1. Turn “OFF” the main power to the pool heater.

2. Turn “OFF” the main manual gas shutoff to the pool

heater.

3. Remove the front outer jacket panels.

4. Disconnect the manifold from the gas train using the

union(s) just below each gas valve(s).

5. Remove the mounting nuts from the manifold mounting

brackets. Pull the manifold/orifice assembly away from

the burners. Repeat for each manifold assembly.

6. Remove two mounting screws from the burner and slide

the burner out toward the front of the pool heater. Use

caution to prevent damage to burners, refractory, hot

surface igniter or wiring.

7. Remove soot from the burners with a stiff bristle brush.

Dirt may be removed from the burner ports by rinsing the

burner thoroughly with water. Drain and dry burners

before re-installing. Damaged burners must be replaced.

When installed in a dusty and dirty location, the burners may

require cleaning on a 3 to 6 month schedule or as needed,

based on severity of contamination. Contaminants can be

drawn in with the combustion air. Non-combustible particulate

matter such as dust, dirt, concrete dust or dry wall dust can

block burner ports and cause non-warrantable failure. The

standard inlet air filter will help eliminate dust and dirt from

entering the pool heater.

Heat Exchanger Cleaning

1. While burners are removed, check the heat exchanger

surface for sooting. If present, the heat exchanger must be

cleaned and the problem corrected. Proceed as follows.

2. Remove gas manifold(s)/orifice assemblies as described in

steps 1 through 5 in Burner Removal and Cleaning, this page.

3. Disconnect the wiring from the hot surface igniter and the

hoses from the burner pressure tap.

4. Remove inner jacket panel mounting screws and slide the

door assembly out toward the front of the pool heater. Use

caution to prevent damage to the refractory and hot surface

igniter.

5. Check “V” baffles along the front and back edges of the heat

exchanger. Remove and clean if necessary.

6. Remove soot from the heat exchanger with a stiff bristle

brush. Use a vacuum to remove loose soot from the surfaces

and inner chamber.

7. The heat exchanger can be removed by sliding towards the

front of the pool heater. Once the heat exchanger is removed

from the pool heater, a garden hose can be used to wash the

tubes to ensure that all soot is removed from the heat

exchanger surfaces.

Note: Do not wet the pool heater’s refractory.

8. Ensure that all burner ports are cleaned to remove any soot.

See Burner Removal and Cleaning, this page.

9. Carefully reinstall the heat exchanger, “V” baffles, and

frame runners if removed from the pool heater.

Note: Make sure frame runners seal securely where they

contact the front and rear compartment refractory.

10. Carefully reinstall inner jacket panels, burners, manifolds,

wires and hoses. Use new gasket material to ensure a

proper air seal.

11. Reassemble all gas and water piping. Test for gas leaks.

12. Reassemble outer jacket panels.

13. Cycle the pool heater and check for proper operation.

Electrical

This pool heater uses a transformer to supply a low voltage

control circuit. The voltage on the secondary side should be 24

to 28VAC when measured with a voltmeter. This unit has a 7

AMP circuit breaker provided on the secondary side of the

transformer. A tripped circuit breaker indicates a short in the

24VAC controls that must be corrected.

Combustion and Ventilation Air

Combustion Air Filter

This unit has a standard air filter located at the combustion air

inlet. This filter helps ensure clean air is used for the

combustion process. Check this filter every month and replace.

The filter size on the 500,000 - 750,000 Btu/hr models is 12" x

12" x 1" (30.5cm x 30.5cm x 2.5cm) and 16" x 16" x 1"

(40.6cm x 40.6cm x 2.5cm) on the 990,000 - 2,070,000 Btu/hr

models. You can find these commercially available filters at

any home center or HVAC supply store.

Venting System

Examine the venting system at least once a year. Check more

often in the first year to determine inspection interval. Check

all joints and pipe connections for tightness, corrosion or

deterioration. Clean screens in the venting air intake system as

required. Have the entire system, including the venting system,

periodically inspected by a qualified service agency.

Air Flow

Check frequently to be sure the flow of combustion and

ventilation air to the pool heater is not obstructed.

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Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS User Manual Page 48

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