30
ONLY USE GENUINE HAYWARD REPLACEMENT PARTS
51300803801 REV B
CHECK-OUT & START-UP:
GENERAL: The heater is equipped with a control system that automatically monitors the “Pool” and “Spa” temperature set points and control
devices. Then when heat is needed, turns on the combustion air blower, hot surface igniter and gas valve to light the burners and monitor the
flames. Figures 19 - 22 provide a summary of heater components and their locations. Some procedures will require the heater to be operating.
The full lighting and shutdown instructions are included in this manual as well as on the lighting and operating label affixed to the inside of the
top water side panel of the heater. Water must be flowing through the heater during any operation. Check that the pump is operating and the
system is filled with water and purged of all air prior to starting the heater.
CONTROL SETUP
This pool heater is equipped with a digital thermostat which allows the user to select the desired water temperature (see Figure 23). The heater
will then function automatically to maintain the desired temperature. The heater has 4 modes of operation:
1. STANDBY: in this mode, the heater will not function to heat the water.
2. SPA: in this mode, the heater will automatically function to maintain the water temperature setting for SPA mode.
3. POOL: in this mode, the heater will automatically function to maintain the water temperature setting for POOL mode.
4. BYPASS OPERATION “bo” is displayed. In this mode the heater will respond to a remote call for heat for set point control and monitor
the local thermostat for high return water temperature (maximum of 104°F).
Use the MODE button to change STANDBY/POOL/SPA modes. The indicator lights will illuminate to show which mode is currently active.
USER PANEL AND KEYPAD INPUTS:
The control accepts user inputs via
the user panel (Figure 23).
1. Use the mode button to change from “STANDBY” to either “SPA” or
“POOL” (see Figure 21). There may be up to a 10- second delay
before the heater starts operating. The control performs an internal
self-test and then verifies that the blower vacuum switch contacts are
open before energizing the blower.
2. It is normal for the heater to encounter a 1- to 2-second delay in
responding to any user panel input.
3. It is normal for the heater to encounter up to a 5-second delay when
the user panel is used to reset the control to clear an error code.
4. The control will accept a mode change during lockout after 5
seconds. The control will continue to display the error code and
remain in lockout until it is reset. At reset the control will go to the last
saved mode.
NORMAL OPERATION FOR POOL & SPA MODES:
The control continually compares the water temperature with the set point and the high
limit temperature. When the sensed water temperature is more than 1°F below the set
point, a call for heat is generated and a heating cycle is initiated. When a call for heat
starts, the numeric display on the user panel (see Fig. 23) will show a series of lines to
indicate the progression of the unit’s ignition sequence. The displayed indicators, along
with approximate times between each step are shown in Figure 24. When the ignition
sequence completes successfully, the current water temperature will be displayed
again. The temperature set point cannot be adjusted while the ignition sequence
indicators are active.
1. The control checks the differential pressure switch for open contacts and then
energizes the blower. After the blower is energized, the contacts are checked
again to ensure they are closed and the 30 sec. pre-purge timer is started.
2. The control energizes the igniter during the pre-purge cycle and allows it to
reach ignition temperature, approximately 20 seconds.
3. The control energizes the gas valve to permit the flow of gas for the 4 sec. trial
for ignition and monitors flame current.
4. The igniter is turned off when flame current is sensed or when the trial for
ignition is completed.
During a heating cycle, the differential pressure switch, limit string, water temperature
sensor, and flame current are constantly monitored to assure the heater is operating
properly. When the thermostat is satisfied and the call for heat ends, the control
immediately de-energizes the gas valve and flame extinguishes. The control operates
the blower an additional 30 seconds as a post-purge.
Figure 23: User Panel
Figure 24: Ignition Sequence Display
CALL FOR HEAT,
LIMIT CHECKS
PRE‐PURGE STARTED
IGNITER WARM‐UP
GAS VALVE OPENED
FLAME SENSED,
IGNITION SUCCESSFUL
20 SEC.
5 SEC.
10 SEC.
4 SEC. MAX