MICROPUMP, INC.
A Unit of IDEX Corporation
PO Box 8975, Vancouver, WA 98668-8975 • Phone: 360/253-2008 • Fax: 360/253-8294
MICROPUMP
LIMITED
A Subsidiary of Micropump, Inc.
2 Howard Road, Eaton Socon, St.
Neots, Cambridgeshire, PE 19 8ET England, • Phone: 011-44-1480-356600 • Fax: 011-44-
1480-
356300
Page 13 of 33
2.2 Electrical Requirements
2.2.1 A 200 V
ac
, 400 Hz. 3 phase (115 V ac phase-to-neutral) power source capable
of delivering 1 amp continuously, which is needed to operate the pump motor.
2.3 Test Setup
2.3.1 The test setup shown in Figure C, or its equivalent, is required to check the
operating condition and adjust the Model 668-400-2. Required electrical
connections are described in Figure D.
2.4 Adjustment/Test Procedures
2.4.1 Adjustments
2.4.1.1 Over-Pressure Release Adjustment
2.4.1.1.1 This adjustment prevents back flow up to 30 psi (2.07 bar) system
pressure.
2.4.1.1.2 Connect Model 668-400-2 into test set. Close valves 1 and 2. Add
one hand pump to test setup between pressure gauge and valve 2.
Open valve 1 completely and valve 2 partially. Energize pump and
run for one minute to establish water in test system. De-energize
pump. Close valves 1 and 2. Disconnect tubing from valve 1
(pump side). Establish system pressure with hand pump, allowing
pressure to build slowly to 25 psi (1.73 bar). Watch tubing
disconnected from valve 1 and raise system pressure slowly toward
30 psi (2.07 bar). Water should start to leak from tubing at 30 psi
(2.07 bar).
2.4.1.1.3 Adjustment involves removal or addition of shims in over-pressure
release setting and requires disassembly of that setting. Refer to
Disassembly and Figure 2 of IPL. One shim approximately equals
3 psi (.21 bar). Add shim (s) to raise setting; remove shim(s) to
lower setting.
2.4.1.1.4 After adjustment, remove hand pump from test setup and
reconnect tubing to valve 1.
2.4.1.2 Pressure Regulator Adjustment
2.4.1.2.1 This adjustment prevents the pump from increasing system
pressure above 25 psi (1.72 bar) while in operation.
