Leak-Test The System; Connect The Cooling-Water Supply; Electrical Installation; Introduction - Edwards 30B5M Instruction Manual

B064-04-880 Issue F
3.5

Leak-test the system

The 30B5M pump is stringently leak-tested before despatch. After you have installed the 30B5M pump, leak-test the
system before you fill the pump with fluid; outgassing from the fluid may give false test results. The pump fluid is
viscous at ambient temperature and may block small leaks.
The level of leak-tightness required will depend on the application of your vacuum system. You must leak-test the
system to ensure the integrity of the system and its vacuum seals.
3.6

Connect the cooling-water supply

Maintain the temperature of your cooling-water supply below 35 ºC. If you do not, you will not be able to achieve
the specified performance of the pump.
Connect the cooling-water supply and return pipes to the 1 inch BSP cooling-water inlet and outlet connectors on the
cooling-water inlet and outlet manifolds
the cooling-water supply, connect the pumps in parallel and not in series.
Your cooling-water supply must meet the specification in
We recommend that the cooling-water supply is filtered and that you incorporate a flow indicator into the supply
system.
3.7

Electrical installation

Ensure that the electrical installation of the 30B5M conforms with your local and national safety
requirements. The pump must be connected to a suitable rated and protected electrical supply
and a suitable earth (ground) point.
3.7.1

Introduction

Ensure that the boiler protection thermal snap-switches are wired into the pump control system,
and are correctly adjusted when the pump is fully charged with fluid and under vacuum.
The thermal trips are to protect the pump from overheating from low oil level, which may cause
the boiler to implode.
Note: Where necessary, refer to the circuit diagrams for the pumps shown in
Two versions of the 30B5M pump are available:
On the control configured pump, the control-box is fully configured; the cooling-fail and boiler protection

thermal snap-switches will automatically shut-down the pump when an over-temperature fault occurs.
On the unconfigured pump, the outputs of the thermal snap-switches are connected to terminals in the

control-box. You must configure the control-box or connect the outputs to your control equipment to shut-
down the pump when an over-temperature fault occurs: refer to
Page 14
CAUTION
(Figure 1, items 17 and 18). If you have to connect more than one pump to
Section 2.
WARNING
WARNING
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Figure 9 and 10.
Section 3.7.4.
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