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6
IaQ series
5. Connect the wires to the terminals on the
control assembly as shown in wiring diagrams.
Replace face plate.
dUCT MoUnTInG on THe ReTURn
aIR—Wall base
Humidistat/Dehumidistat versions (optional)
Do not install the humidistat on the warm air duct
or within 48" of UV light.
Wall mount option requires Bosch
P/N 7738002911
1. Locate the humidistat at least 24" upstream of
the humidifier or bypass on the return air duct.
Avoid areas of direct radiation like secondary
heat exchanger in the fan compartment.
2. Cut a square in the duct 2-1/4" wide and 1-3/4"
tall. Remove the inner portion of the mounting
gasket and discard. Use the outer portion to
seal between the plastic base and the duct. Line
up the base with the cut out and accurately mark
the holes thru the plastic duct mount plate. See
Figure 6.
figure #6 - Wall Mount version
3. Remove the humidistat and drill four 3/32"
FIG. 2
mounting holes.
GASKET PLACEMENT
4. Place the outer portion of the mounting gaskets
on the plastic base and mount the base with four
screws. Low voltage wire may enter the
humidistat under the gasket.
6 720 220 343
duct Mounting on the Return air-Wall base
5. Connect wires to terminals on the control
dUCT MoUnTInG on THe ReTURn
aIR—dUCT base
Humidistat/dehumidistat versions (recommended)
Caution
1. Locate the humidistat at least 24" upstream of
2. Remove face by inserting screwdriver into the
3. Use the plastic duct mount plate as a template.
4. Place duct mount base gasket on the humidistat
USE OUTSIDE
PORTION ONLY
WITH DUCT
MOUNTING
USE BOTH WITH
WALL MOUNTING
WALL MOUNT BASE
(CAN MOUNT ON DUCT
WITH GASKETS SHOWN)
USE WITH DUCT
MOUNTING ONLY
5. Connect wires to terminals on the control
Subject to change without prior notice
assembly as shown in wiring diagrams. Replace
the face plate.
Do not install the humidistat on the warm air duct
or within 48" of UV light.
the humidifier or bypass on the return air duct.
Avoid areas of direct radiation like secondary
heat exchanger in the fan compartment.
pry slot and twisting. See Figure 7.
Accurately mark and drill the (4) 3/23" mounting
holes and cut away the 4-1/4" x 2-1/2" section of
the duct mount plate.
base and mount the base with four screws. Low
voltage wire may enter the humidistat under the
gasket. See Figure 7.
figure #7 - duct Mount version
FIG. 1
DUCT MOUNT
VERSION
assembly as shown in the wiring diagrams.
Replace face plate.
SCREWDRIVER PRY SLOT
DUCT MOUNT BASE
GASKET
DUCT MOUNT BASE
Revised 07-12
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