Utility Equipment and Air System

TM 5-6640-213-14

(a) Connect a length of garden hose from

the outlet side of the water connection box (18, fig. 1-4) for use as

a drain.

Close the sink faucet.

(b)

Close the inlet gate valve.

(c)

Close the tank gate valve (16,

(d)

fig. 2-3).

(e)

Open the air bleed valve on the water

tank sight gage.

(f) Start the pump using the ON-OFF switch

located in a wire mold above and to the left of the sink.

(g) SlOWlY open the sink faucet and allow

the pumped water to force air from the system.

(h) Check the pressure switch to make sure

that the water pump stops operation when the sink faucet is closed

and starts operating when the sink faucet is open. In the event the

pump fails to respond when the faucet is opened or closed, rotate the

adjustment screw on top of the switch to raise or lower the cutoff

pressure accordingly.

NOTE

To prolong the life of the water pump, make it a

standard practice to place the ON-OFF switch in

OFF position when the water system is not in use.

(3) Utility Equipment and Air System.

(a) Description.

Principal components of the air

system are discussed below.

1. Pump. The vacuum-pressure, rotary-type,

power-driven pump is a unit designed to produce a vacuum of 27 inches

(68.6 cm) of mercury (Hg) to meet the macuum filtration requirements

of the laboratory and to produce a pressure of 25 psi (1.76 kg/sq cm)

maximum to meet the Reid vapor pressure (RVP) gage calibration require-

ments of the laboratory. The pump is located on the bottom of cabinet

(No. 12) on the left-hand side of the laboratory next to the sink cabi-

net and in front of an air surge tank to which the positive pressure

outlet is connected. Pump data are as follows:

Motor:

General Electric "Form G" Split

phase, 115V, 60 Hz, ac

Vacuum down to 27 in. (68.6 cm)

Pump:

of Hg. Pressure up to 25 psi

(1.76 kg/sq cm)

. . . . . . . . . . . . . . . . . . . . . . . 15 in. long; 8 in. wide, 8-1/2

Dimensions:

in. high," overall (38.1 cm long,

20.3 cm wide, 21.6 cm high)

2-11