SAMUEL JACKSON HU-SOUTHWEST-1480, Руководство по обслуживанию

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PAGE 52 of 84 HU-SOUTHWEST-1480 GAS-FIRED HUMIDAIRE UNIT
© SAMUEL JACKSON, INCORPORATED 2005 ALL RIGHTS RESERVED
COMPRESSED AIR SUPPLY : Connect a 1/4-inch compressed air supply pipe to the
air connection for the hydro-cyclone flush valve. Supply pressure should be at least 80
PSI (5.5 bars). The volume of air is negligible.
CAT-5 SHIELDED ETHERNET CABLE: CAT-5 shielded Ethernet cable is used
when connecting the Humidaire Unit to the optional Moisture Mirror II control. RF-45
termination is used for both cable ends. 330 feet (100 meters) is the recommended
maximum cable run length.
THERMOCOUPLE WIRING: The following rules need to be followed when wiring
the thermocouple temperature sensors from the Thermocouple to the Humidaire Unit
electrical panel. The signal from the temperature sensor is 4-20mA DC.
•
Always use shielded, 2 conductor cable from the thermocouple to the control panel
terminal blocks. Terminate the shield only on the electrical panel end.
•
Never run the shielded sensor wires with the power wiring (including 120 VAC
control wires). You can run several shielded 4-20mA shielded wires together in the
same conduit with other wires marked sensitive on the external connection diagram.
WARNING!
FAN INTERLOCK:
The installing electrician must connect a fan run interlock signal of
120VAC (or 240VAC if 240VAC relay is supplied) to terminals 96 and 97 on the
Humidaire Electrical Panel. This interlock is an extra safety device. It turns off the
burner instantly when the fan motor stop button is touched. A relay for this purpose is
supplied on the electrical panel of the Humidaire Unit. It is labeled FIR. The
Humidaire’s PLC control system will verify the presence of the fan interlock before
permitting operation. If bypassed, the Humidaire will signal this as an error later in
operation.
Part No. 21708 & 21710 Type ‘J’
Thermocouple shown with 4-20mA
Transmitter in junction head.
Connect 4-20mA signal wires to heater
cabinet to terminals 1
(+) , 2 (-) .
Red
(-) wire from Thermocouple junction
goes to terminal 6, white (+) goes to
terminal 4.