TM 10-5410-221-14/1
Section II OPERATION UNDER UNUSUAL CONDITIONS
2-14. Operation in Extreme Cold
CAUTION
Observe water system tank and
When shutting down, for extended periods in cold
plumbing for excessive heating due
weather, drain and purge the water system as follows:
to purge air. If external temperature of
a. Remove the supply hose from the water supply
water
system
components
tank.
approaches safe touch temperature,
b. Flow hot water and cold water into the closet
decrease compressed air flow or shut
shelter until the utility element water supply is depleted.
off air flow completely until system
c. Shutoff the water pumps in the utility element.
cools. Excessive temperatures will
d. Disconnect the hot water recirculating hose at the
damage the pump and valve seals.
valve shutoff on the utility element.
e. Drain the utility element hot water tank by turning
(3) When all water has been purged, note which
on the tank drain valve.
water connection is discharging maximum amount of air,
f. Open up all the other water drains at the utility
then close that connection. Continue to close
element.
connections discharging maximum amount of air until
g. Disconnect the external water supply hose at the
only one connection remains open, then shut off
utility element and connect the compressed air hose.
compressed air. Remove air hose assembly from cold
h. Open the compressed air valve about half way to
water outlet fitting and close remaining connection and
purge residual water.
cold water outlet valve. Disconnect compressed air hose
i As the water ceases to flow from the utility element
assembly from compressed air outlet fitting, coil hose
drains, cap all the drains in sequence.
assembly, and secure ends for storage.
j. Turn the compressed air on all the way and
operate the shelter faucets until no water flows, only air.
2-15. Operation in Extreme Heat
Depress nozzle on flex hose only until all water is
No special operations required.
purged.
k. Open the faucet drain valves and actuate the
2-16. Operation in Dusty or Sandy Areas
faucets with the drain valves open.
No special operations required.
1. With the sump cover strainer removed, insert the
compressed air hose into the sump drain. Purge sump
2-17. Operation Under Rainy or Humid Conditions
and drain line. m Close the hot and cold water valves on
Procedures for operation under rainy conditions are
the utility element.
as follows:
n. Disconnect the dual water hose and the supply
a. Ditch around outskirts as shown in figure 2-14.
and drain water hose from the connection panel. Drain
b. Provide adequate drainage ditches to prevent
all hoses and purge. Coil hoses and secure ends for
standing water entering air lock chamber.
storage.
c. Close and secure all doors.
o. Drain and purge all hoses and shelter plumbing.
p. Drain the utility element water system as follows:
2-18. Operation in Salt Water Areas
(1) Remove drain caps from hot water tank, heat-
No special operations required.
exchanger and surge tank drains. Open hot and cold
water faucets, the drain, and return valves and the hot
2-19. Operation in Snow and Ice
water and surge tank vent valves until all water has
Procedures for operation in snow and ice areas are
drained from the system, then close vent valves.
as follows:
(2) Connect compressed air hose assembly to
a. Apply bleed air and/or hot air from utility heating
compressed air outlet fitting. Hold discharge end of air
unit to fabric of air lock to assist in erection.
hose assembly against cold water outlet fitting. Open
b. Remove snow from exterior of shelter with a soft
compressed air valve approximately 20-to-30-Deg to
bristled brush or broom.
deliver a small flow of compressed air into water system
c. Remove ice build-up by applying bleed air and/or
to purge residual water.
hot air from utility heating unit.
2-20. Operation in Mud
No special operations required.
2-19
