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LP-454 REV. 1.6.15

B. OVERALL WATER HEATER AND CONTROL OPERATION

These water heaters have two control systems: one to regulate the bottom combustion system, and one to regulate the top.*

To adjust the temperature of stored water, press and hold

{S3}

for 2 seconds. The first item is:

: Water Temperature Set Point

–

factory set at 119°F. Adjust down by pressing

{S1}

to a temperature as low as 95°F. Adjust up as high as 160°F by pressing the

{S2}

Press

{S3}

again to display

, the differential which is factory set at 7°F and adjustable down to 1°F by pressing

{S1}

and up to 18°F

by pressing

{S2}

. Note: Due to the highly advanced control on this water heater, which compensates for varying inlet water

temperature, the actual differential temperature may vary slightly from your setting. Press

{S3}

again to display the factory default

temperature measurement in Fahrenheit. Change the default to Celsius by pressing

{S1}

. When finished, press

{S3}

one final time to

place unit back into operation. The control automatically re-starts if no key is pressed for 2 minutes.

To increase system efficiency, it is advised to set the top control at a higher temperature (for example, 125

F), and the bottom control at

a lower temperature (110

F). This allows the water heater to stage the combustion system.*

*NOTE:

PHP199-119 models have one combustion system, and one control system.

C. STATUS MENU

Installers are also able to check the current status of the heater parameters by pressing

{S4}

for 3 seconds. Once activated, the display

will show

|d1|

alternating value of the actual upper supply tank temperature. Actual values are displayed for each function. To view the

next value, simply press

{S/4}

to go to the next displayed value. Listed in Table 9 are the values which can be displayed. These values

cannot be changed. To exit this menu, press

{S3}

to resume normal operation.

Function

Value

|d1|

Actual temperature from upper tank sensor

|d2|

Actual temperature from lower sensor

|d3|

|0|

(Not used)

|d4|

|308|

(Not used)

|d5|

Outdoor sensor

|d6|

Actual fan speed multiplied by 10 (Example: If fan speed displayed is

|410|

RPM x 10 = 4100 actual fan speed)

|d7|

Actual ionization current read from flame rectification probe

|d8|

|0|

(Not used)

|d9|

|1|

(Not used)

|d10|

Actual status of bus communication

|co|

= connected,

|nc|

= not connected

|d11|

|32|

(Not used)

|d12|

Power on hours in thousands (display will not read until 100 hrs.)

|d13|

Total water heating hours in thousands (display will not read until 100 hrs.)

|d14|

|0|

(Not used)

|d15|

Passed ignition attempts in thousands

Table 9

– Status Menu

D. TEST MODE

This function is intended to simplify the gas valve adjustment if needed. Listed below are the recommended limits on each heater and
the combustion settings. Automatic modulation does not take place when the controller is in Test mode, only temperature limitation
based on the heater set point. The user will be allowed to increase or decrease the fan speed by pressing in either the

{S1}

{S2}

keys.

To activate the Test Mode simply press the

{S2}

and

{S3}

key together for 1 second. Once activated, you will see in the display

{Ser}

and the actual fan speed. The measurement of the combustion levels should always be taken at the highest and lowest fan speed.
When in Test Mode, the heater

’s limit will shut down the burner if temperature limit is exceeded. It is recommended to draw water out of

the tank to lower temperature so tests can be performed.

After 10 minutes, Test Mode stops automatically. To exit Test Mode manually, press

{S1}

and

{S2}

key together for 1 second.

COMBUSTION SETTINGS ON ALL MODELS

Natural Gas

Propane LP

Fan Speed

Low

Ignition