Laars Pennant PNCP 500 Installation And Operation Instructions Manual
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Contents
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LAARS Heating SystemsPage 145.3.2 Programming Control ParametersThere are four (4) control parameters that may beset. They are the Pool Loop Temperature (LSP), thePool Loop Temperature Differential (dLS), the BoilerTemperature (bsp) and the Pump Off Delay (Pd).The pool loop temperature (desired pool temp-erature) is set by changing the LSP parameter. Afterscrolling through the parameters until LSP is displayed,press the enter button. The setpoint will be displayed.Press the up arrow or down arrow buttons until thedesired setpoint is displayed. Press the enter button andthe setpoint will be activated. The display will return toindicating the present pool loop temperature.In addition to the ability to set the pool looptemperature, the differential associated with thatsetting may also be adjusted. The differential is set bychanging the dLS parameter. After scrolling throughthe parameters until dLS is displayed, press the enterbutton. The setpoint will be displayed. Press the uparrow or down arrow buttons until the desired setpointis displayed. Press the enter button and the setpointwill be activated. The display will return to indicatingthe present pool loop temperature.The boiler operating temperature is set bychanging the bsp parameter. After scrolling throughthe parameters until bsp is displayed, press the enterbutton. The setpoint will be displayed. Press the uparrow or down arrow buttons until the desired setpointis displayed. Press the enter button and the setpointwill be activated. The display will then return toindicating the pool loop temperature.The last parameter that may be adjusted is Pd, thepump off delay. After again scrolling through theparameters until Pd is displayed, press the enter button.The pump delay time will be displayed. The pump offdelay may be set between 0.1 and 10 minutes. Press theup arrow or down arrow buttons until the desired setpointis displayed. Press the enter button and the setpoint willbe activated. The display will again return to indicatingthe present pool loop temperature.By depressing the upper left hand button at anytime during the programming, the menu may bereturned to the beginning.5.3.3 Setpoint - LSPThe setpoint is the desired temperature aroundwhich the heater will control (desired pool temp-erature). It is adjustable between 60° F and 104° F.5.3.4 Differential - dLSThe differential (dLS) is the number of degreesbetween the temperature at which the heater turns offand the temperature at which the heater restarts. It isadjustable from 1° F to 10° F.5.3.5 Pump OperationThe pump energizes when there is a heat demand.5.3.6 Heater Purge (Pump Delay) - PdAfter a demand is satisfied, the pump willcontinue to run for a preset length of time. That lengthof time is adjustable from 0.1 to 10 minutes and isprogrammed by the parameter Pd.CautionShould overheating occur or the gas supply fail toshut off, turn off the manual gas control valve to theappliance.5.4 Limit ControlsIn addition to the pool heater temperaturecontrol, Pennant appliances are fitted with a PoolLoop high limit set at 135° F and an automatic resetheater high limit with a maximum setting of 190° F.The Pool Loop high-limit sensing bulb is to beinstalled in the sensor well (supplied), downstream ofthe heater (see Figure 6). If sufficient capillary lengthexists to reach the sensor location, the control mayremain in its location near the rear of the cabinet onthe right side, behind the slide out drawer (see Figure9). If the sensor location is farther from the heater thanthe capillary will reach to, then the control should bemoved to the remote location and the wires extended tothe new location of the control. If the controller needs tobe moved, and it is being moved to an outdoor location,the control will need to be put in a weather-tightenclosure to protect it from rain, snow, etc.The other limit control limits the temperature ofthe discharge from the heat exchanger to a maximumof 190° F. This limit should be set to a minimum of175° F. To set the limit controls, remove the controlpanel cover and pull the control panel out to gainaccess. Appliances with reversed heat exchangers havethe limit controls relocated to the left side of theappliance. The left access door must be removed togain access to the limit controls on these appliances.SECTION 6.Operating Instructions6.1 Sequence of OperationThe amber “Ready” light on the front panelindicates that the control system is energized. Upon acall for heat from the pool temperature control, thegreen “Heat” indicator on the front panel will light.The green “Pump” indicator on the front panelwill light.Once the water flow switch makes, and if all ofthe safety interlocks are closed, the ignition module(s)will energize the blower(s) for a 15-second pre-purge,followed by a 20-second period to allow the ignitor(s)to heat.Energizing the blower pressurizes the air box(which supplies air to the burners) and closes the |
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