INSTALLATION INSTRUCTIONS FOR SG SERIES
SG-9, SG-14, SG-18, SG-23, SG-27, SG-36
Page 2
3. CONTROLS
All of the steam unit controls are a maximum 24
volts and are protected by 2amp. fuses located
on the electronic circuit board. The circuit board
and the terminals for connecting the external
controls are located in the left (low voltage) side
of the main electrical connection box. The
circuit board controls:
a. steam boiling tank water level.
b. one of the boiling tank low water cutoffs.
c. the main heating element relay contactors.
d. the drain flush system.
e. a timer for the HI TEMP operating
temperature air switch button.
f. use of either the time clock or remote switch.
The wiring connections will be described later.
4. WATER SUPPLY
The water supply connection to the steam
generator must be according to local codes.
The water supply line must be flushed to
eliminate any construction debris prior to
connecting to the steam generator.
SEE “CAUTION 9" on page 5.
Commercial Relax-A-Mist steam generators are
equipped with two fresh water systems; one for
the normal steam operation and one for the
drain flush system. There are two 1/2" solenoid
valves located on the back of the main electrical
connection box on the steam generator (one for
each system). These two valves each have a
1/2" copper pipe with a flared union stubbed
out. They can be connected together so a
single shutoff can be installed or each can have
its own shutoff.
The “steam operation” water supply valve is
connected to a 3/8" copper pipe which goes into
the top of the boiling tank (left of center). The
"drain flush" water supply valve is connected to
a 1/2" copper pipe with a trap, which goes into
the top center of the boiling tank, between the
steam pipes.
If not already in the water system, a "water
bumper" should be supplied and installed.
The water supply should be analyzed to
determine the presence of any minerals and/or
other impurities that could coat, corrode, or
impede the operation of the Relax-A-Mist water
boiling tank interior. If necessary, the water
must be treated to offset any adverse condition
which may arise, or the warranty may be null
and void. See GENERAL on page 1 and
“CAUTION 6" on page 5.
5
DRAIN VALVES, PIPING & FLUSH SYSTEM
There is a drain piping kit (with a union) that
connects to the steam generator pipe marked
“DRAIN”. The two drain valves supplied with
the commercial Relax-A-Mist are installed to/or
on this piping kit.
a. A 1" electric automatic drain valve that
opens at the end of each day.
b. A 3/4" manual drain valve (installed to loop
the electric valve - see illustration of drain
valve piping kit) for use when manual
draining is desired.
The boiler is drained by gravity alone, so the
drain system through the electric drain valve
must not be less than 1". The drain piping kit
discharge union should be piped directly to a
floor drain,(leave an air gap between drain pipe
and floor drain). The drain piping kit provides
for the pressure relief loop connection. See the
illustration on the Component Description page.
DRAIN VALVE ELECTRICAL CONNECTION
The drain valve is 24 Volts A.C., and is
connected to the terminal strips in the left side
of the electrical box on the steam unit:
a - Connect terminal #1 on the valve to
terminal #1 in the control box.
b - Connect terminal #2 on the valve to
terminal #2 in the control box.
c - Connect terminal #4 on the valve to
terminal #4 in the control box.
Note: See wiring diagram on the inside cover of
the low voltage connection box.
