LP907A
Airstream Insertion Thermostat
INSTALLATION INSTRUCTIONS
APPLICATION
The LP907 Airstream Insertion Thermostat is a direct-acting,
single-pipe, bleed-type controller with a rigid element. The
LP907B (no longer available) was the same as the LP907A
with lockout capability. It included a pneumatic switching relay
for lockout during summer (cooling) operation. When
replacing the LP907B, use an LP907A and an RP670A
Switching Relay.
SPECIFICATIONS
Model: Direct-acting, bleed-type controller.
Dimensions: See Fig. 1.
Temperature Ratings:
Operating Range: 40°F to 140°F (4°C to 60°C).
Storage (Maximum Safe): 150°F (66°C).
Throttling Range (adjustable internally): 10 to 70°F (6 to 39K).
Setpoint Range(s): 40°F to 140°F (4°C to 60°C);
Dial Front: 40°F to 90°F (4°C to 32°C),
Dial Back: 90°F to 140°F (32°C to 60°C).
Setpoint Adjustment: Dial under cover.
Element: 18-3/4 in. (476 mm) long x 3/8 in. (10 mm) diameter
invar rod and seamless brass tube.
Maximum Safe Air Pressure: 20 psig (138 kPa).
Air Connections: Push-on barb for 1/4 in. (6 mm) poly tubing.
Mounting: Insertion with locknut on insertion coupling.
Accessories:
14002913-002 External Restriction [0.007 in. (0.2 mm)].
301572A00767 Calibration Adjustment Key.
309387 Filter Assembly.
CCT2085 Gage Adapter.
BEFORE INSTALLING
Use with a 0.007-inch (0.17 mm) diameter restriction such as
the 14002913-002 Filter/Restriction Cartridge or the integral
restriction in the MP516B and C Damper Operators.
When mounting with an immersion well, use 107408 Heat
Conductive Compound in the well to improve response.
NOTE: For further information concerning wells, see Form
68-0040 Immersion Wells and Compression Fittings
for Temperature Controllers.
1-1/16 (27)
7/8 (22)
5/8
(16)
3/8 NPT
NUT
SPACERS (2)
DUCT WALL
18-3/4 (476)
3-7/16
(87)
1/8 NPT
2
(51)
2-1/4 (57)
1/2
(13)
HONEYWELL
11/32
(9)
3/4 DIAM. HOLE
(MINIMUM)
REQUIRED
FOR MOUNTING
M7996A
Fig. 1. Dimensions of LP907A in in. (mm).
INSTALLATION
The LP907A can be mounted in any position. See Fig. 2
through 4 for mounting configurations.
OPERATION
Due to its bleed-type construction and wide throttling range,
the LP907A provides submaster-type operation (most often
low-limit control) in a normal unit ventilator system. See Fig. 5
through 7 for typical hookups.
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Copyright © 2001 Honeywell • All Rights Reserved
95- 1612EF
