INSTALLATION AND SERVICE INSTRUCTIONS
4211-1661 Rev A
01/28/2022
Page
12
of
17
SECTION 3: PLUMBING INSTRUCTIONS (continued)
IMPORTANT
All drain lines must run downhill, away from the steam generator!
Also see Diagram 3
•
Do not run the drain uphill.
•
Do not drain the safety valve into the steam line!
•
Do not drain the safety valve into the steam room! Draining the tank into the steam room may present a
scald hazard or damage the materials used to construct the steam room.
•
Do not drain into the steam room!
SECTION 4: WIRING INSTRUCTIONS
ALSO SEE ELECTRICAL INFORMATION CHART AND WIRING DIAGRAMS
1. ELECTRICAL ROUGH-IN:
Size wire for the generator as required by local or national codes. See the electrical
information on page 13 for further information. Use copper wire only. Leave 4ft (1,2 m) of slack wire at generator
location for finish hookup. Connect the generator to a dedicated circuit breaker. A GFI device is usually not required
by safety agencies. One may be installed if required by local codes or the owner.
A GFI device will tend to nuisance
trip due to heater element aging.
a. Route the copper supply wire with appropriate strain
relief through the hole marked POWER ENTRY.
b. Connect the supply wires to the power terminal block as
indicated on the wire diagram for your voltage and
phase. This may require moving factory installed
jumper.
Do not change the steamer’s internal jumpers or
wiring. Only the supply wiring side of the terminal blocks
require configuration by the installer.
c. Connect the Earth wire to the copper Earth ground lug.
d. Cover the supply wires inside the steamer with a
protective mesh or similar material to protect them
from water valve heating.
2. ELECTRICAL INFORMATION
The steamers are available in
2 basic versions, one for 208V (intended for 208VAC single and three phase for North American use) and 240V
(intended for all other installations. The 240V models are rated at 240VAC and may be used on 208 to 240V single
phase Line-to-Line or 208 to 240V~N (Line-to-Neutral) or 208V to 240V three phase Delta without Neutral or for Y-
connected three phase 380 to 415V~N3.
All Units are factory wired for single phase installation. The installer may change the input to three phase or three
phase with Neutral during initial installation (see the wiring diagrams on page 16-17).
The National Electrical Code (NEC) limits a steamer’s current to 48 Amps so, in some cases, two separate power
supplies are required: WWSU11 & WWSU15 208V single phase and WWSU15 240V single phase require this
method.
See page 17 for Mains Wiring Details:
Note: jumpers shown are supplied with the steamer)
DIAGRAM 8
CONDUIT
KNOCKOUT
WIRE DRAIN BLOCK
TO TERMINAL
BLOCK NEXT TO
GROUND
