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INSTALLATION INSTRUCTIONS FOR SG SERIES
SG-9, SG-14, SG-18, SG-23, SG-27, SG-36
6. STEAM PIPING & STEAM NOZZLES
See “CAUTION 1, 2 & 5" on page 5. The steam
nozzle piping should be roughed in 18" above the
finished floor of the steam room. Steam nozzles
must be located away from user pathways where
the steam will not burn anyone sitting on a bench
or where they would come in contact with the
steam. Care must be taken to AVOID A STEAM
TRAP.
Use each of the steam nozzles supplied, one per
steam pipe. For maximum efficiency, all steam
pipes must be:
a. secured or suspended.
b. of rigid copper.
c. insulated.
d. sloped so that no condensate will collect.
e. installed by the most direct or shortest route
using the fewest number of elbows, will in
most cases, maintain a lower pressure, less
than 1 lb. in the boiling tank, than will a
longer route with many elbows).
There is to be no restriction in the steam pipes
between the steam generator and the steam
nozzles that would in any way cause pressure to
build in the boiling tank. See “CAUTION 1, 2 & 3"
on page 5. ALL condensate MUST be able to
drain from ALL sections of the steam pipes at
ALL times. Warning steam nozzle is Hot!
There are two copper steam lines with unions
stubbed out of the top of the steam generator.
On each of the two steam lines supply and install
hard copper steam pipes (maximum 25 ft. per
pipe) to a steam nozzle on each pipe. Each of
the two steam pipes is to be terminated with a
single steam nozzle sized to the steam pipe. See
“CAUTIONS 2 & 3" on page 5. See “Figure 1"
below for model, steam pipe and steam nozzle
count and sizes. For other steam nozzle
configuration consult with Relax-A-Mist 1-800-
987-8326 or the warranty will be void.
Figure 1.
model
steam pipes size
no.
steam heads
inches
SG-9
2
3/4”
SG-14
2
3/4”
SG-18
2
1”
SG-23
2
1 - 1/4”
SG-27
2
1 - 1/4”
SG-36
2
1 - 1/2”
7. THERMOSTATS
The electronic thermostats supplied with the
Relax-A-Mist are Johnson Controls models
A350 HI TEMP (operating temperature), S350
LO TEMP (standby temperature) and D350
digital readout. When plugged together, these
thermostats control 2 room temperatures with
one sensor. The readout D-350 displays the
room temperature or the set point, in real time.
During the room construction, there should be a
3/4 inch conduit (i.e. plastic) installed in the wall
to facilitate the installation of the room
temperature sensor. The conduit should enter
the room so the sensor will be positioned 5 feet
from the finished floor or at the shoulder height
of a person sitting at the highest seating level.
The acrylic temperature sensor guard, supplied
with the generator, must be installed in a
vertical position to encourage the passage of air
around the sensor. This makes it much easier
to accurately monitor the room temperature.
Mount the thermostat din rail and controls on a
wall next to the steam generator where they
can not be tampered with.
THERMOSTAT HOOKUP
The thermostats are to be electrically
connected to the sensor and to the steam
generator using #18 AWG LVT wire, or
equivalent, as follows:
Note: Connect the A-350, the S-350 and the
D-350 controls by plugging them
together on the din rail provided. Then
proceed with the wiring.
TEMPERATURE SENSOR TO CONTROL
i. Identify the "SEN" and the "COM"
terminals in the upper left side of the HI
TEMP model A350 (left) thermostat
control.
ii. Connect one wire from the room
temperature sensor to the “SEN”
terminal.
iii. Connect the 2nd wire from the room
temperature sensor to the “COM”
terminal.
