Check Valve

Symbol

Direction Of Flow

A-00370

5.Install the replacement Check Valve by reversing the above procedure and noting the following:

•Coat the threads of the Fittings with a teflon sealer before installing on the replacement Check Valve.

M.Secondary Gas Check Valve Replacement

1.Remove the Top Panel per Section 5.04-B.

2.Disconnect the two Secondary Gas/Water Hose Assemblies from the T-Fitting connection at the Check Valve.

3.Carefully remove the Check Valve and Fittings from the Secondary Gas Regulator Assembly.

4.Remove the Fittings from the input of the old Check Valve.

NOTE

The output of the replacement Check Valve should be pointing away from the Pressure Regulator As- sembly when installed. The output is designated by an arrow on the side of the part.

5.Install the replacement Check Valve by reversing the above procedure and noting the following:.

•Coat the threads of the Fittings with a teflon sealer before installing on the replacement Check Valve.

5.10Main Heatsink Assembly Parts Replacement

NOTE

Refer to Section 6.09, Main Heatsink Assembly Re- placement Parts, for parts list and overall detail drawing.

A. 70 Amp STR. Diode Replacement

The Diode Replacement Kit (Cat # 8-1168) is a direct parts replacement for the failed Diode Assembly in the Power Supply.

The following parts are supplied with each replace- ment assembly:

•70 Amp, 600V Str Diode Assembly (1 each)

•0.75 inch diameter Thermal Interface Pad (1 each)

•Tube of RTV (1 each)

1.Turn OFF main input power to the Power Supply both at the Power Supply ON/OFF switch and at the main power disconnect.

2.Wait at least two minutes to allow the input ca- pacitors to discharge.

3.Open the Power Supply to gain access to the faulty Diode Assembly.

4.Locate the old Diode Assembly inside the Power Supply.

5.Unsolder the wire lead from the old Diode Assem- bly.

6.Remove the old Diode Assembly from the unit. Make sure the replacement diode is a direct re- placement for the old one.

NOTE

To avoid damage to a replacement diode from over- heating during installation, a proper heatsink (ex- ample: alligator clip) must be used to dispurse heat when soldering the wire lead to the diode.

7.Install the replacement diode by reversing the above procedure and noting the following:

aWipe the surface clean where the replacement diode is to be installed.

NOTE

The thermal interface pads must be properly aligned when replacing the diode.

b.Position the thermal interface pad between the diode and contact surface where the diode will be installed.

CAUTION

Diodes can overheat if not properly installed.

c.Install the replacement diode and torque the diode to 20 - 25 in-lbs (2.3 - 2.8 Nm).

Manual 0-2533

45

REPLACEMENT PROCEDURES

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Thermal Comfort 3000 manual Main Heatsink Assembly Parts Replacement, Secondary Gas Check Valve Replacement
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3000 specifications

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