4
PLUMBING CONNECTIONS
WARNING
: PLUMBING CONNECTIONS MUST COMPLY
WITH APPLICABLE SANITARY, SAFETY AND PLUMBING
CODES.
Connect the water supply line to the
3
/
8
" NPT (internal
thread) copper tube inlet. The
3
/
8
" water line supplies water
to both the generator tank and the cooling system where
steam is condensed before entering the drain line. Install
the line strainer provided. A manual shutoff valve must be
provided convenient to the steamer.
DRAIN CONNECTIONS
The drain connection (Fig. 2) must be 1" IPS down,
preferably with one elbow only, maximum length of 6 feet,
and piped to an open gap type drain.
CAUTION
:
In order
to avoid any back pressure in the steamer, do not
connect solidly to any drain connection.
PL-50880
2 0 ( 5 0 0 )
M I N .
2 ( 5 1 )
1 1 / 4 N P T T O O P E N
G A P D R A I N
B Y C U S T O M E R
D R A I N V E N T
B Y C U S T O M E R
Fig. 2
WATER QUALITY
The water supply connected to this steamer should contain no more than 2.0 grains of hardness per
gallon with pH from 6.5 to 8.0. This degree of hardness and pH can easily be obtained with the use
of a properly maintained water softener.
Water supplies vary from one location to another. A local water treatment specialist should be
consulted before installing any steam generating equipment.
Untreated water contains scale producing minerals which can precipitate onto the surfaces in the
boiler. Due to the temperatures in the boiler, the minerals can bake onto the surfaces and components.
This can result in early component failure and reduced product life.
Mineral scale on components causes several problems:
1. The surfaces of the heating devices become coated with scale, reducing the heat transfer
efficiency. This can produce hot spots on the heating elements and result in premature failure.
2. The water level probes become coated with scale. Scale will bridge across the probe insulator from
the metal extension which senses the water level in the boiler shell. Once this scale becomes wet,
the water level control is unable to maintain the proper water level in the boiler. This situation may
cause an electric heating element to fail if the element is not adequately covered by water.
Strainers and filters will NOT remove minerals from the water.
Refer to REMOVAL OF LIME SCALE DEPOSITS, page 12.
VENT HOOD
Some local codes may require the steamer to be located under an exhaust hood. Information on the
construction and installation of ventilating hoods may be obtained from
Vapor Removal from Cooking
Equipment, NFPA standard No. 96 (latest edition).
