User's Manual

Modu-Flo
®
System
6-6
42000
R
6.6 TANK BLOWOUT SWITCH
MAINTENANCE (OPTION P4)
6.6.1 General. Maintenance tips, disassembly, and
assembly instructions for tank blowout switches are dis-
cussed in Paragraphs 6.6.2 and 6.6.3. A typical tank with
blowout switch is shown in Figure 6-4 and should be
referred to during the discussion.
6.6.2 Tank Blowout Switch Maintenance Tips. No
maintenance is required on the blowout switch. If this switch
assembly is suspected to be defective, check all wiring to the
switch before removing any components.
WARNING
Disconnect and lock out all power from the
assembly before attempting disassembly.
Serious injury may result from electrical shock.
NOTE
Relieve system pressure before removing any
components.
6.6.3 Assembly/Disassembly of Blowout Switch. Figure
6-4 shows a typical blowout switch mounted on a tank. All
components are connected by pipe threads and tubing and
are easily assembled or disassembled. The blowout body
(15) is connected to the IND port on the manifold. The return
elbow (12) is piped into the fill port of the reservoir. Normally,
the only components which may require removal are the
switch (6), indicator assembly (8) and blowout disc. Access
to these components is easily achieved after removal of any
connective tubing.
6.6.4 Tank Blowout Switch Parts List. Table 6-6 identi-
fies the parts indexed on Figure 6-4.
Table 6-6. Tank Blowout Switch Parts List
Item
Number Part Number Description Quantity
521-001-210 BLOWOUT SWITCH ASSEMBLY (Option P4) --
1 435-360-020 FITTING, Straight, 1/8 NPT x 1/4 inch tube 2
2 416-701-992 SCREW, Round head, 6-32 x 1-3/8 inch, included in Part No. 511-573-020 2
3 421-070-050 LOCKWASHER, No. 6, included in part Kit No. 511-573-020 4
4 410-030-050 NUT, Hex, No. 6-32, included in Part No. 511-573-020 2
5 419-110-020 SCREW, Socket-head, 10-24 x 1/2 inch 2
6 529-726-001 SWITCH, Included in part No. 511-573-020 1
7 501-967-001 BRACKET, Switch, included in part No. 511-573-020 1
8 511-160-001 INDICATOR ASSEMBLY, Included in part No. 511-573-020 1
9 435-370-020 FITTING, Elbow, 1/8 NPT x 1/4 inch tube 1
10 412-380-020 TEE, 1/4 NPT 1
11 509-365-030 CHECK VALVE ASSEMBLY 1
12 435-370-030 FITTING, Elbow, 1/4 inch male pipe x 1/4 inch tube 1
13 509-223-000 SPUD, Union 1
14 509-224-000 NUT, Union 1
15 509-208-000 BODY, Blowout 1
16+ TUBING, Copper, 1/4 inch outer diameter x 0.030 wall 4 ft
-- 511-573-020 BLOWOUT SWITCH ASSEMBLY 1
-- 560-900-270 BLOWOUT DISCS, Bag of 6, 1450 psi 1
* See Table 6-1 for other disc pressure ratings.
+ Tubing purchased separately
*