Hayward H250 User Manual

26
SECTION 6. QUALIFIED TECHNICIAN - MAINTENANCE/SERVICING
General:
! lMPORTANT: Only qualied service technicians, having
appropriate test equipment, should be allowed to service the
heater. Bear in mind that all of the components that comprise the
system have an effect on the heater operation. Before proceed-
ing with heater related troubleshooting tips covered in Section
VII, be certain that the pump is operating correctly, the lters and
strainers are not blocked, the valves in the piping are properly
positioned and the time clocks are properly set.
! WARNING: Do not attempt to repair any components of
heater. Do not modify heater in any manner. To do so may result
in a malfunction which could result in death, personal injury, or
property damage. Check with consumer to see if any part of
heater has been under water. Replace any part of the control
system and any gas control which has been under water. Never
use or attempt to use parts that have previously been used.
Maintenance:
The following inspection procedures are recommended to be
performed as part of annual heater maintenance and to assure
safe operation.
1. External heat exchanger.
2. Internal heat exchanger.
3. Main burner and pilot (millivolt heater only) ame patterns.
4. Main burner orices and pilot orice (millivolt heater only).
5. Operating controls.
Inspection procedures are covered below. Some of the
procedures will require disconnecting and removing wires in the
control compartment. See Control Access below.
Control Access:
Access to some of the operating controls is gained by remov-
ing the control panel on the front of the heater. See Figure 43.
1. Turn the two screws counterclockwise which secure the
control panel door.
2. Open the control panel to access the operating controls.
3. ! CAUTION: Label all wires prior to disconnection when
servicing controls. Wiring errors can cause improper and
dangerous operation.
4. Verify proper operation after servicing.
5. After servicing is complete close control panel door and
secure by turning screws clockwise.
External heat exchanger inspection
and cleaning:
Inspect the external surfaces of the heat exchanger for soot
accumulation. If soot has accumulated on the tubes it must be
removed and its cause must be corrected.
Soot on a heat exchanger may be ignited by a random spark
or open ame. To prevent this from occurring, dampen any soot
deposits with a wet brush or water spray before servicing or
cleaning the heat exchanger. The soot can be removed with a
wire brush or a high velocity water spray after the heat exchang-
er has been removed. (See removal procedure below.) Although
the heat exchanger should be cleaned of soot and reinstalled in
the heater, the fact that sooting occurred should be investigated
as it may be indicative of some other problems, such as:
• Insufcient air supply.
• Inadequate venting.
• High or low gas pressure.
• Blockage of secondary air openings.
• Improper location of heater.
• Incorrect gas supply pipe size.
• Excessive water ow through heat exchanger.
• Low LP tank (below 30% full).
Figure 43: Control Access
2 SCREWS
TAB
CONTROL
PANEL

Hayward H250 Specifications

General

Brand	Hayward
Model	H250
Category	Swimming Pool Heater
Language	English