Pentair MT Sizes 500 important safety instructions Maintenance, Manual Gas Valves

MegaTherm Commercial Pool Heating Boiler Page 15

Pilot Valve

ON POSITION

Main Gas Valve

Pilot Valve

OFF POSITION

Main Gas Valve

Figure 14. Manual Gas Valves.

Pilot Relay Manual

Reset Switch

(Standing Pilot Systems)

Figure 15. Pilot Safety Relay.

should check the water temperature with an accurate thermometer; spa or hot tub thermostats may err in regulating water temperatures by as much as four degrees Fahrenheit (2.2°C).

e.Persons with a medical history of heart disease, circulatory problems, diabetes or blood pressure problems should obtain their physician's advice before using spas or hot tubs.

f.Persons taking medications which induce drowsiness, such as tranquilizers, antihistamines or anticoagulants, should not use spas or hot tubs.

SECTION 4.

Maintenance

1.Lubricate the pump seal every 6 months with ½ oz. of SAE 30 non-detergent oil. Slowly add to pump oil cup located on top of the bearing bracket.

2.At start-up and every six (6) months thereafter, the pilot and main burner flame should be observed for proper performance (see Figure 16). See attached lighting and shut-down instructions for proper pilot flame pattern. If flame has the appearance of "sooting" tips, check for debris near orifices and call the Pentair Water commercial Pool and Spa technical support (see page 2).

3.Inspect the venting system for obstruction, leakage and corrosion at least once each year.

4.Keep heater area clear and free from combustible material, gasoline and other flammable vapors and liquids (see Table 1 for minimum clearances).

5.Be certain all combustion air and ventilation openings in the room are unobstructed.

6.Check for fouling on the external surfaces of the heat exchanger every six months. (NOTE: after installation and first start-up, check the heat exchanger for fouling after the following periods of operation: 24 hours, 7 days, 30 days, 90 days and once every six months thereafter.)

Fouling on the external surfaces of the heat exchanger is caused by incomplete combustion and is a sign of combustion air and/or venting problems. As soon as any fouling is observed, the cause of the fouling should be corrected (see Section 5, Troubleshooting Guide). The heat exchanger can be checked with a flashlight by locating a mirror under the burners. An alternate method is to remove the venting and top panels as necessary to inspect the heat exchanger from above. Also check the vent system for defects at this time. (If cleaning is required, shut off all electrical and gas supply to the heater.)

7.To expose the heat exchanger:

Indoor Models: Remove the flue pipe, top of unit, rear upper jacket, flue collector rear panel and heat exchanger baffles.

Outdoor Models: Remove vent top assembly, rear upper jacket, flue collector rear panel and heat exchanger baffles.

8.To remove all burners:

It is usually more convenient to remove the burner tray assembly. Disconnect sensor wire, ignition cable (or thermocouple generator) and pilot gas line. Disconnect manifold inlet union(s). Remove the four (4) retaining screws. Grasp the manifold pipe and slide out the burner tray.