Honeywell LP920A Instructions D'installation page 2

LP920A AND B REMOTE BULB CONTROLLER
NOMINAL DIMENSIONS LP920 WELLS
SENSOR DIMENSION
WELL (IN.) (MM)
315046B 7-3/8 187
315904B 7-5/16 186
Fig. 3. LP920 well-mounted model.
Duct Mount Models
CAUTION
Equipment Damage Hazard.
When locating duct-mounted models, consider
the maximum element safe temperature, 230°F
(110°C). Avoid contact with or radiation from
any high pressure steam or high temperature
water coils.
Integral Bulb Model
1. Drill, saw or punch 1 in. (25mm) diameter hole for
the sensing element. See Fig. 4.
2. Bend the element holder to the side for ducts of
less than 15 in. (380mm).
3. Use two no. 8 screws (not furnished) with a gasket
(furnished) to mount on the duct work.
DUCT
GASKET
NO. 8 SHEET
METAL SCREWS
M18369
Fig. 4. LP920 integral bulb model.
Remote Bulb Model
1. Use two no. 8 screws (not supplied) to mount in a
convenient location.
2. Insert the bulb into a 1 in. (25mm) hole in the duct
work as with the integral bulb installation. See Fig.
5.
3. Apply gasket (provided) to the duct.
95-7273EF
1/2 NPT
1 IN. HEX HEAD
BRACKET
MATERIAL
COPPER
STAINLESS STEEL
M18368
1 IN. (25 MM)
DIAMETER
HOLE
BEND FOR DUCT OF
LESS THAN 15 IN. (380 MM)
CAUTION
MINIMUM 1 IN. (25 MM) RADIUS
Fig. 5. LP920 remote bulb model.
Averaging Element Model
Mount controller element in an accessible location where
it is distributed to sense average temperature. See Fig. 6.
NOTE: When used as a discharge air or mixed air con-
troller, mount the element far enough down-
stream from the heating coil or mixing dampers
to ensure reasonable mixing of the air before its
temperature is measured.
NO. 8
SHEET METAL
SCREWS (2)
Fig. 6. LP920 averaging element
duct mounted controller.
Duct Mounting Using Perforated Strap Iron
Supports
1. Drill a large center hole for the sensing element to
pass into the duct and two mounting holes for no. 8
sheet metal screws. See Fig. 7.
2. Run the sensing element into the duct.
3. Fasten the device and gasket onto the duct with
two sheet metal screws (not provided).
4. Form the element in the duct for uniform sensing of
samples throughout the duct.
CAUTION
Equipment Damage Hazard.
Be careful not to crush the element when using
wire ties.
2
ELEMENT LOCATED IN DUCT
APPROXIMATELY 10 FEET (3M) HIGH.
DUCT
CAPILLARY
TO ELEMENT
LP920 MOUNTED TO COLUMN
WITH NO. 8 SCREWS
CONTROLLER IN CONVENIENT
LOCATION APPROXIMATELY
5 FEET (1.5M) FROM FLOOR
M18370
GASKET
CAPILLARY
M18371