Designs, materials, weights and performance ratings
are approximate and subject to change without notice.
Visit
armstrong
international.com for up-to-date information.
Armstrong
International
221 Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
Tel. (269) 279-3602 Fax. (269) 279-3130
Page 22 of 44
Preventive Maintenance – continued
Clean-in-Place (CIP) Instructions for Digital-Flo
®
(DF)
a. Close the steam inlet following lockout/tagout procedures.
b. Close the condensate line.
c. Stop recirculation pump(s), close the cold water inlet and recirc return line, depressurize the exchanger (via
blowdowns or HWO pressure gauge ball valve with hose to drain), then close the hot water outlet.
d. De-energize the DF control panel following lockout/tagout procedures.
e. Remove the 1” NPT pipe plug from the DF cold water inlet CIP connection and replace it with the close pipe nipple
supplied on union-end of the CIP hose. See CIP unit detail on following pages.
f. Connect a hose to the close pipe nipple and position to drain.
g. Open the cold water inlet to flow water through the heat exchanger, and through the garden hose to drain. Flush for
10 minutes, or until the outside of the heat exchanger is cool to the touch.
h. While the heat exchanger is being flushed, prepare the Armstrong CIP unit for service: Connect CIP hoses – with
ball valves closed – to the pump discharge and tank inlet connections. Verify that the tank drain valve is closed.
Open the pump discharge and tank inlet valves. Fill the holding tank with Rite-Qwik™ (minimum of 10 gallons).
See CIP unit detail on following pages.
i. Close the DF cold water inlet, and allow flush-water to drain completely.
j. Disconnect garden hose.
k. Remove the 1” NPT pipe plug from the DF hot water outlet CIP connection and replace it with the close pipe nipple
supplied on union-end of the CIP hose.
l. Connect the CIP hose from the pump discharge outlet to the close pipe nipple installed on the hot water outlet.
Verify ball valve is closed.
m. Connect the CIP hose from the tank inlet to the close pipe nipple installed on the cold water inlet. Verify ball valve is
closed, and leave tank fill opening uncapped to allow venting.
n. Connect the Armstrong CIP unit power cord to a GFI protected circuit, verify the tank-to-pump valve is open, and
start the pump.
o. Slowly open the ball valve on CIP hose connected to hot water outlet.
p. Slowly open the ball valve on CIP hose connected to cold water inlet. The CIP unit will begin circulating Rite-Qwik™
through the heat exchanger.
q. Fizzing and foaming in the CIP unit tank will indicate scale is being actively dissolved. Monitor level of foaming, and
be prepared to stop pump to prevent overflow.
r. When the Rite-Qwik™ is no longer fizzing or foaming, the cleaning process is complete. Note that the maximum
Rite-Qwik™ circulation time is three hours.
s. Stop the pump, close the CIP hose ball valve connected at the hot water outlet, and allow the heat exchanger to
drain to the CIP tank.
t. Close the CIP hose ball valve connected at the cold water inlet.
u. Disconnect the hose from the CIP tank inlet, and position to drain.
v. Open the cold water inlet to allow fresh water to flush through the heat exchanger, and through the CIP hose to
drain. Flush for 15 minutes.
w. Close the cold water inlet, and disconnect the CIP hoses from the Digital-Flo
®
.
x. Remove the close pipe nipples and replace the 1” NPT pipe plugs. Return the close pipe nipples to the CIP hoses
for safekeeping.
y. Recommission the Digital-Flo
®
following IMPORTANT instructions on page 17.
z. See Clean-in-Place unit maintenance details on following page.
Содержание Digital-Flo DF41540
Страница 45: ...Notes...
