INSTALLATION INSTRUCTIONS FOR
SMALL AND LARGE BYPASS HUMIDIFIERS
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION INFORMATION BEFORE STARTING.
This product must be installed by a qualified heating and air conditioning contractor.Failure to do so could result in serious
injury from electrical shock. This product must be installed in compliance with all local, state, and federal codes.
WARNING
1. Disconnect electrical power to the furnace and installlock-outtag before
starting installation. Failure to do so could result in serious injury from
electrical shock.
2. Sharp edges may cause serious injury from cuts. Use care when
making plenum openings and handling duct.
3. Hot water temperatures in excess of 125°F may cause serious injury
from burns. Make sure water supply is shut off before connecting
the water supply.
CAUTION
1. Do not install unit where freezing temperatures could occur.
2. Do not install unit or bypass connection on the furnace cabinet.
3. Do not install unit or bypass connection on a plenum face where
the blanked off ends of the cooling coil restrict air movement
through the humidifier.
4. Do not set humidity higher than recommended. Condensation
damage may result.
5. Do not connect a transformer to multi-speed furnace blower motors
or blower motors other than 120 VAC. Premature component failure
may result. Connect secondary transformer leads as last step.
6. Do not set humidity up to recommended levels if there is
condensation on the inside windows of any unheated living
space. Condensation damage may result.
7. Do not install unit on the supply plenum where duct static pressure
exceeds
8. Do not install humidifier where water pressure exceeds 125 psi,
since damage to the unit may result. Follow codes in effect
concerning pressure reduction.
SBP
SMALL BYPASS
HUMIDIFIER
Unit Dimensions
12718"w • 12314 "H • 9118"D,
6_ di& round Ope,_lng
Plenum Opening
9318"W • 9112"H
V'_ter Feed Rate
3 gph
Electrical Data (_
24V-60HZ. 0,5 AMP
LBP
LARGE BYPASS
HUMIDIFIER
Unit Dimensions
13118"W x 15112"H • 9118"D,
i" dia. round O_ f*ing
Plenum Opening
J71e'w x t z:_14"H
Water Feed Rate
6gph
Electrical Data _)
24v*G_IHz, 0,$ AMP
Diagram A:
FOR HUMIDIFIER OPERATION DURING "HEATCALL"ONLY
24 VAC
"HUM"
Terminals On
Furnace
Huml_lstaf
Diagram B:
For Humidifier Operation "When Blower Is Energized
NOTE: CONNECT
SOLENOID VALVE
TO HOT WATER IF
HUMIDIFIER V_ILL
BE OPERATED
INDEPENDENT OF
HEATING CALLS.
3 VAC
_AC"
Telrrnlnals
On Furnace Transfofr.er
{Flek3 St._opt,eo)
Hu/11KI41_
H VAC
Soleno_l V_ve Leads
Hum_qslat
Diagram C:
For Humidifier Operation With Thermidistat Control
_: Do Not Connect Furnace HUM Terminal Directly To
TherrmOzstatHUM Terminal
1. Place unit on
flat surface, pull
front cover up on
right side. It
snaps loose.
Disconnect feed
tube nozzle and
lift evaporative
media and scale control insert out at the top.
2. The unit is
assembled for
left side dis-
charge. If right
discharge is nec-
essary, remove
the right and left
screws from
the unit interior
side walls and exchange the two sides. Reassemble
with screws.
3. Draw a level
line on furnace
supply plenum at
least 1V2" above
furnace cabinet
to allow for water
supply line and
drain hose.
Accurately cut a
plenum opening (Small Bypass Unit, 93/e'W x
91/s'H and Large Bypass Unit, 93/4"W x 121/2"H),
being careful to avoid injury from sharp edges.
4. Place the unit
into the plenum
opening so that
the looking tabs
on the bottom
are closed down
onto the lower
sheet metal
edge. While hold-
ing the unit in place, install two screws at the top
of the unit interior.
5. Install a 6"
collar in a con-
venient location
on the opposite
plenum. Slip on a
90° elbow and
measure the
length of 6"
round duct
required to make the connection. The 6" duct wifi
fit into the round collar on the side of the unit. If
the furnace has central air conditioning, add a
duct damper. Assemble components with sheet
metal screws. Support bypass ducts in excess of
4' to prevent sagging.
6. Reattach feed
tube nozzle and
replace the evap-
orativo assembly
complete with
the evaporative
media by fitting
the drain tube
into the round
receptacle at the bottom of the unit. Push the
assembly in at the top against the beveled tabs.
Replace the front cover.
7. HUMIDISTAT INSTALLATION INSTRUCTIONS
The humidistat is
designed for low
voltage service to
control humidifi-
cation equipment.
An increase in
relative humidity
expands the
nylon ribbon that
opens the control switch to stop operation on the
humidifier. A decrease in relative humidity revers-
es the process and closes the control switch.
Install the humidistat.
DISCONNECT ELECTRICAL POWER TO
FURNACE BEFORE PROCEEDING
LOCATION
a) Locate on inside wall of living area approxi-
mately 5' above floor, or in the furnace return
air plenum. Use enclosed adapter plate for
return air installation.
b) Do not locate control in the direct path of
furnace discharge air or drafts from open
doors and windows.
c) Do not install where operation might be
affected by lamps, sunlight, fireplace registers,
radiators, concealed air ducts and pipes, or
room occupants,
d) The basic rules for Iooabon of thermostats
also apply to humidistats.
GENERAL INSTRUCTIONS
a) DO NOT ATTEMPT TO REPAIR OR RECALl-
BRATE CONTROL. Controls requiring service
should be returned to your distributor.
b) Control must be installed using 24 volts!
c) Make sure no bare wires are exposed or
insulation damaged. Insulation on wire should
extend to head of binding screws.
d) Make sure all splices are mechanically and
electrically secure.
e) To remove dirt or other foreign matter from
nylon ribbon and control interior, dust lightly
with a fine, soft brush.
8. Tap into a
water supply line
with the saddle
valve furnished.
The humidifier
will function with
cold, hot, softened
or unscftened
water. The use of
service hot water (140"F MAX.) and constant blow-
er operation will provide maximum evaporative
capacities. NOTE: The saddle valve isdesigned to
be fully opened or closed. Do not use itto regulate
water flow.
TO INSTALL ON COPPER OR PLASTIC PIPE
a) Place rubber gasket in center of hole in top
saddle clamp. Place top and bottom saddle
clamp around water pipe. Using bolts, tighten
saddle clamps evenly - clamps should be par-
allel - DO NOT over-tightan.
b) Screw valve body intoopening in top saddle
clamp and tighten.
c) Tighten gland nut onto valve body.
d) Install V4" water supply line from humidifir
using compression fittings.
e) You are now ready to pierce the pipe. Turn
handle until spindle is firmly seated into va_
body. The water pipe is now fully pierced.
Turning spindle in shuts valve off. Open valve
completely for normal operation.
TO INSTALL ON STEEL OR BRASS PIPE
a) Shut off water supply. Open any faucet to
relieve water pressure.
b) Drill 3/_s"diameter hole into pipe where saddle
valve will be placed.
c) Place rubber gasket in center of hole in top
saddle clamp.
d) Place top saddle clamp assembly over hole so
that lance fits into hole.
e) Place top and bottom saddle clamp around
water pipe.
f) Screw valve body into opening in top saddle
clamp and tighten.
g) Tighten gland nut onto valve body.
h) Install 1/,_.water supply line from humidifier
using compression fittings.
NOTE: For pipe over 1° O. D., use V4"-20,
13/4"long bolts.
9. Connect tubing
from the saddle
velve to the
inlet side of the
scler_d valw
using V4"O
copper tubin_
(not furnished,
DOUBLE WRENCH TO PREVENT LEAKING
AND VALVE BREAKAGE!
10. Connect 1/2=
I.D. plastic hose
(not furnished)
from unit to floor
drain. Be sure
drain hose has
continuous
slope. Use cau-
tion if hose
clamp is used to not over tighten and crack drain
spud. NOTE: Do not sweat or directly attach
metal drain line to fitting. Do not use solvent
type adhesive when connecting plastic drain
hose, since damage to fitting could result.
11. Open saddle
valve and turn on
furnace. Turn up
humidistat to
operate unit.
Allow unit to run
until water is
observed coming
out of drain line.
Check to see if unit is watertight and all electrical
components function properly. Reset humidistat
to recommended level.
OP #1(X]0559_ 5.01.0_ o 2002 CAC/BDP Form:IM-HUM-02
RO. BOx70 IP_napoSs, IN45204 Catalog:63HU-M01
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