Hurricane SCH25, Руководство по обслуживанию и устранению неисправностей

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Page 9
2. Control Board
• Control box and board – The main control board is contained in a
stainless steel control box and is connected to the heater via a
15ft/4.6m long, ½in/13mm diameter interface cable.
All components in the heater unit are pre-wired to the main
terminal block on the control board - Figure 3 shows the
connections.
• Fuses – The control board contains four fuse holders with fuses pre-
installed. These are standard, automotive, spade type fuses available
from most auto parts stores. The fuses are (from left to right):
ƒ
Fan/Logic – 10 amps
ƒ
Main – 15 amps
ƒ
Pump – 10 amps
ƒ
Zone Fans – 10 amps
• Accessory terminal block – The following components need to be
wired into the accessory terminal block on the control board:
ƒ
Thermostats (up to four). Additional 4 zone board available for
larger applications.
ƒ
Fan heaters / Solenoid Valves / Motorised Valves
ƒ
Fan speed switches (if any)
• Fault bypass and reset buttons – These buttons allow testing of
the heating system by bypassing the fault-sensing circuit. This fault
bypass feature is engaged by depressing and holding the top button,
depressing and releasing the bottom button, and then releasing the
top button. To reset the heater, turn the heater service switch OFF,
then ON again.
Do not leave heater running unattended in bypass mode. Bypass
mode runs for five (5) minutes.
• Test points – These points on the control board allow
troubleshooting of the heating system. For detailed information on
the use of each test point, see 3.19.
• Diagnostic display – This is an LED indicator for the diagnostics of
the heater. It also has signal lights for the heater power and
circulating pump.
• Circulating pump jumper – This jumper on the control board allows
you to run the circulating pump and test the system circulation
without turning the heater on.