Submittal Sheet

LP916A-C PNEUMATIC REMOTE BULB THERMOSTATS

75-5559

CALIBRATION CHECK

Set setpoint knob to temperature measured at bulb location.

Branchline pressure should be 8 ±1 psi (55 ±7 kPa).

CALIBRATION

LP916A & C

A Apply 18 psi (124 kPa) main-line pressure.

B Measure temperature at sensing bulb location.

C Remove setpoint knob using 5/64-in hex wrench to

loosen setscrew.

D Rotate setpoint shaft to achieve 8 psi (55 kPa)

branchline pressure. Allow enough time for pressure

build-up.

E Replace the knob and position the pointer to

correspond to the temperature sensed by the remote

bulb.

LP916B

A For direct action, follow Steps 1 through 5 for LP916A

and C.

B For reverse action (except LP916B1058), apply 13 psi

(90 kPa) main-line pressure. For the LP916B1058,

apply 9 psi (62 kPa) main-line pressure.

C Adjust switchover lever stop (Fig. 6) to achieve 8 psi

(55 kPa) branchline pressure when the setpoint knob is

set to measured bulb temperature. For the

LP916B1058 model, branchline pressure should be

6 psi (41 kPa).

Fig. 6. LP916B Automatic switchover mechanism.

SWITCHER

LEVER STOP

SWITCHER

SPRING

ADJUSTING NUT

STUD

C8363