Disabling The Boiler; Changing The Temperature Setpoint For Dhw; Changing The Temperature Setpoint For Ch; Finding The Master Boiler - FULTON FHE-250 Installation, Operation & Maintenance Manual

3.8.2

DISABLING THE BOILER

There are three ways that the boiler can be disabled without shutting down the whole system:
1. Press the "DHW Mode" button. Safety procedures and frost protection are still active, but the
boiler will not fire on DHW demand. To exit, press the "DHW Mode" button again.
2. Press the "CH Mode" and "DHW Mode" buttons together to enter Suspend mode. Only frost
protection is active in Suspend mode. To exit Suspend mode, press the "Confirm" button once.
3. If the DHW demand is controlled by a switch, move the switch into the "Off" position to stop the
boiler. This will stop the boiler until the switch is turned back to the "On" position.
Note: Frost protection will be active at all times as long as the boilers are not disconnected from the power supply
and they are not in error mode. Any boiler that is in error mode will not fire until the error condition ceases.
3.8.3

CHANGING THE TEMPERATURE SETPOINT FOR DHW

1. Go into Installer+ mode by pressing the "Confirm" and "DHW Mode" buttons for 3 seconds.
2. Press "CH +" repeatedly, to go to parameter 24 - indicated as "P 24" on the display.
3. Press either the "DHW +" or "DHW –" button until the desired setpoint is reached.
4. Press the "Confirm" button to confirm the change.
5. Press the "Confirm" and "DHW Mode" buttons for 3 seconds.
6. Observe that "Para" is flashing on the display.
3.8.4

CHANGING THE TEMPERATURE SETPOINT FOR CH

1. Press either the "CH +" or "CH –" button until the desired setpoint is reached.
2. Press the "Confirm" button to confirm the change.
3.8.5

FINDING THE MASTER BOILER

The master boiler displays the water temperature if there is no error message. The slave boilers will
display "SLA X" where X is the address of the slave.
If there is an error message then the master boiler will display "XYZZ", where:
X is the address of the boiler, where the error is located
Y can be the letter A or E depending on whether it is a lock out error (A), or only a limiting condition
(E)- ZZ is the error code. Refer to Section 4.13 for details of error codes.
A slave boiler will only display "YZZ", where Y and Z are as described above.
3.8.6

BOILER OPERATION

The boiler will start firing by linking the DHW demand terminals, normally performed by a switch or a
thermostat. For the duration of the heat demand the boiler(s) will modulate to the setpoint
temperature. The boiler stops heating when it reaches the setpoint plus 5°C and starts up again
when the temperature drops below the setpoint.
Pumps will overrun a certain time, as specified by "P 07" in Installer+ mode.
Where there is more than one boiler module in the system, the active sensor will be the cascade
sensor, which is normally placed after the header on the common flow pipe.
In the case of one installed boiler, the temperature sensor can also be the cascade sensor. If there
is no cascade sensor installed, then the boiler will modulate according to the water flow temperature
sensor -this is an integral part of the boiler, factory fitted as standard.
FHE-250 MANUAL 09 2014 ISSUE 2
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