Blodgett SC-G Series - Manual (Page 10)

8 OM-SC-G
Installation
For a unit on casters, complete connection to the gas supply with connectors
that comply with the standard for connectors for moveable gas appliances, ANSI
Z21.69 — latest edition. Restrain movement of the unit by attaching a cable or
chain to the eyelet (provided at the back of the frame) and anchoring the cable or
chain to the wall or floor. Make the length and location of the cable such that the
unit cannot pull on the gas connection while the cable is connected.
3. Water Connection
A back siphonage device (check valve) must be installed in both incoming cold
water lines according to local plumbing code. The water line pressure should be
between 30 and 60 PSI. A pressure regulator is required above 60 PSI. A ¾ inch
NH (garden hose type) connector is required to connect the water supply to the
water inlet valves. The minimum diameter of the water feed line is ½ inch. Use
one washer (or, if necessary, two washers) in the hose connection. Do not allow
the connection to have any leak, regardless of how small.
4. Untreated Water Second Connection
As discussed previously, the flow of water used for steam suppression in
the drain is much greater than the amount of water used to generate steam.
The second connection on steamers (see illustration under “Water Quality &
Treatment” section) permits the installer to supply treated water to the steam
generator and untreated water to the drain. With “split water” feature, the initial
fill requirement for treated water is 3.5 U.S. gallons (19 L) within 2.5 minutes.
The requirement for treated makeup water is 0.12 gallon (0.45 L) per minute per
cavity. A field retrofit kit is available for single water connection if required.
5. Drain Connection
The steamer must be leveled front to back. A 1½ inch (38mm) ID hose may be
attached to the drain pipe (supplied) by means of a hose. DO NOT CONNECT THE
HOSE DIRECTLY TO A BUILDING DRAIN. There must be a free air gap between
the end of the hose and the building drain. The free air gap should be as close
as possible to the unit drain. There must also be no other elbows or other
restrictions between the unit drain and the free air gap.
Do NOT use plastic pipe. The drain must withstand boiling water.
Install the drain line with a constant downward pitch. Do not allow any water
traps in the line. A trap can cause pressure to build up inside the cavity during
steaming, which will make the door gasket leak.