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1
MOUNTING
Remote Adapter Nozzle:
Always pitch upward.
Use provided anchors
if mounting to drywall
or plaster.
TrueSTEAM
TERMINAL
24V
24V
HUM
RED
HUM
BLACK
C
GREEN
GT
ORANGE
R
RT
Diversitech WS-1 wet
GF
switch wiring
EXT
If humidifier is in finished space, always install a drip
pan with wet switch. Honeywell Home recommends
Diversitech WS-1 (wiring shown here).
PLUMBING TO FLOOR DRAIN
3
A
Ideal for Installation
Draining water may be hot.
Direct and secure the hose outlet into the floor
drain to reduce risk of hot water pooling or
splashing.
Clamp
Install drain hose with
continuous downhill slope.
M28709
Consult and follow plumbing codes for
drain pipe size and maximum temperature
requirement.
2
SECURE HOSE
Cut a slit in the insulation half way
around the hose.
Do not cut into the
rubber steam hose.
Insert the hose clamp into
DIP 4
DIP 5
the slit and hook it onto the
rubber hose.
M28708
3
B
OTHER PLUMBING OPTIONS
Choose the plumbing option that suits your installation. Use A, B, C, or D based on type of pipe or condensate pump. Consult and follow local plumbing codes in addition to these instructions.
Option 1: Plumbing to drain with
condensate pump.
3/8-IN. TUBING
RATED AT 212°F
HOSE FROM
TrueSTEAM
ALTERNATIVE
3/4 IN. FNPT X 3/4 IN. CPVC
3/4 IN. CPVC PIPE
TO PUMP
HOSE CLAMPS AT
ALL CONNECTIONS
• Use Hartell A3X-115 condensate pump or equivalent
(212°F temperature rating, > 1 GPM pump flow rate).
• Pump must be powered when TrueSTEAM is operating.
• Use a pump with a built-in overflow sensor or install the pump
in a drip pan with wet switch wired to turn off TrueSTEAM.
Option 3: Plumbing to sink with a
dedicated trap.
3/4 IN. MNPT X SWEAT
ALL CONNECTIONS FROM
SOLENOID VALVE TO
3/4 IN. FNPT X 1-1/2 IN. PVC
DRAIN TRAP ARE SEALED
1-1/2 IN. (MINIMUM)
PVC PIPE
1-1/2 IN. PVC
SINK
WELD
3/4 IN. MNPT X 3/4 IN. CPVC
3/4 IN. FNPT X 1-1/2 IN. PVC
WELD
HOSE CLAMP
THREADS
3/8 IN. BARB X 3/4 IN. MNPT
3/4 IN. FNPT X 1-1/2 IN. PVC
ALL PLASTIC PIPE UNDER
SIZE TO FIT PUMP OUTPUT
SINK 1-1/2 IN. MINIMUM PVC
ALTERNATIVE
STAINLESS STEEL
THIS CONFIGURATION ALLOWS FOR
SLOTTED BAND
REMOVAL OF THE TRAP
COUPLING SIZED TO
FIT PIPE (COPPER,
WELD
PVC, CPVC)
1-1/2 IN. PVC
3 in. minimum clearance from nozzle
outlet to duct.
Nozzle at upward pitch.
Minimum upward
pitch of 2 in. per ft.
12 in.
Avoid sharp kinks and
prevent bends.
Clearance hole for hose and insulation.
Seal off unconditioned space with
grommet (not provided) or caulk.
6 in. of straight
vertical rise.
Clamp
Always install nozzle so the
outlet is pointed up.
Do not route the steam
hose through the hole in the
mounting plate.
FOR ALL OPTIONS SHOWN:
• Support rubber hose every 6 in.
• PVC must be schedule 40 or higher rating.
• All plastic pipe joints are welded.
• Drain into a P-trap that will remain wetted at all times.
M28713
Connect to TrueSTEAM.
Common to all plumbing options.
SEAL ALL CONNECTIONS FROM
SOLENOID VALVE TO DRAIN STACK
FLEXIBLE
HOSE
1-1/2 IN. (MINIMUM) PVC PIPE
HOSE
CLAMPS
1/2 IN. BARB X 3/4 IN. MNPT
HOSE FROM
TrueSTEAM
COUPLING
WELD
212°F RATED PUMP
WYE
THREADS
M28681
TRUESTEAM INSTALLATION
24 in. open air downstream.
1-3/4 in. hole
Clamp
M28674
On straight runs, use perforated angle
iron. Otherwise, secure hose every 12
in. using provided hooks.
On straight runs, use
perforated angle iron.
Otherwise, support
hose every 12 in. using
provided hooks.
Always consult and follow local
plumbing codes for drain pipe
size and maximum temperature
requirement.
Option 2: Plumbing to a dedicated trap.
3/4 IN. MNPT X SWEAT
3/4 IN. FNPT X 1-1/2 IN. PVC
1-1/2 IN. (MINIMUM) PVC PIPE
1-1/2 IN. PVC
3/4 IN. MNPT X 3/4 IN. CPVC
3/4 IN. FNPT X 1-1/2 IN. PVC
HOSE CLAMP
3/8 IN. BARB X 3/4 IN. MNPT
3/4 IN. FNPT X 1-1/2 IN. PVC
SIZE TO FIT PUMP OUTPUT
3/4 IN. FNPT X SWEAT
3/4 IN. COPPER PIPE
Option 4: Plumbing to sink trap.
3/4 IN. FNPT X
1-1/2 IN. PVC
3/4 IN. MNPT X SWEAT
3/4 IN. FNPT X 1-1/2 IN. PVC
1-1/2 IN. (MINIMUM)
3/4 IN. FNPT X 3/4 IN. CPVC
PVC PIPE
3/4 IN. CPVC PIPE
1-1/2 IN. PVC
3/4 IN. MNPT X 3/4 IN. CPVC
3/8-IN. TUBING
RATED AT 212°F
3/4 IN. FNPT X 1-1/2 IN. PVC
M28678
HOSE CLAMP
3/8 IN. BARB X 3/4 IN. MNPT
3/4 IN. FNPT X 1-1/2 IN. PVC
SIZE TO FIT PUMP OUTPUT
STAINLESS STEEL
SLOTTED BAND
COUPLING SIZED TO
FIT PIPE (COPPER,
PVC, CPVC)
COMPLETING
Refer to TrueSTEAM Installation Guide
(# 69-2285) to complete wiring and checkout.
If hose slopes downhill...
Downward slope can not be more than
3 ft below humidifier steam outlet.
Provide a 212°F rated Tee at the
lowest point. Do not use plastic Tee.
Hose clamps at
every connection.
Minimum upward
pitch of 2 in. per ft.
Nozzle at
upward pitch.
Minimum 6 in.
Clamps
Minimum 2 in.
Water in elbow.
M28675
VENTED PER
LOCAL CODE
ALL PLASTIC PIPE
JOINTS ARE WELDED
1-1/2 IN. MINIMUM TRAP
(OR SIZE PER LOCAL CODE)
M28679
ALL CONNECTIONS FROM
SOLENOID VALVE TO
DRAIN TRAP ARE SEALED
SINK
COUPLING
WELD
1-1/2 IN.
1-1/2 IN.
PVC TEE
PVC
WELD
WELD
THREADS
ALTERNATIVE
THIS CONFIGURATION ALLOWS FOR
REMOVAL OF THE TRAP
1-1/2 IN. PVC
M28680
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