Owner's manual

8-3.
8-4.
6.
I.
Install air lock housing (14), securing with
socket head cap screws (15).
Restore. air and electrical power to
positioner.
ELECTRIC POSITION TRANSMITTER (EPT].
For information on tbe EF’f for PP405TR Power
Positioner, refer to IB-10%204A, Field Retrofit Kit
Electric Position Transmitter.
HEATRR/THRRMOSTAT. The heater/themmstat
helps prevent freezing of moisture. or condensate in
power positioner supply and signal air lines. This
allows the pilot valve to operate better in
temperatures below freezing. With the
heater/thermostat installed the power positioner can
effectively operate. in temperatures down to -10°F
(-23.3”(Y). Operation below this ambient temperature
is not recommended.
a. Heater Replacement
WARNING
Before performing any maintenance or
repair action on power positioner, shut off
supply air, signal air, and any electrical
supply or electronic signals to power
positioner. Isolate power positioner from aU
systems connected to power positioner.
Severe injury or death may result from
large torque power positioner is capable of
producing, or from electrical shock.
1. Remove power positioner from service, close
supply air shut off valve, and isolate
electrical power from power positioner.
2. Remove heater supply (1 and 2, Figure 8-4)
from terminals 2 and 5 on terminal block
(3).
3. Remove screws (4), washers (5), nuts (6).
and heater (7) from bracket (8).
4. Install new heater, securing with screws (4),
washers (5), and nuts (6).
5. Connect black heater lead (1) to terminal 2
and white heater lead (2) to terminal 5 on
terminal block (3).
h. Thermostat Replacement.
WARNING
Before performing any maintenance or
repair action on power positioner, shut off
supply air, signal air, and any electrical
supply or electronic signals to power
positioner. Isolate power positioner from all
systems connected to power positioner.
Severe injury or death may result from
large torque power positioner is capable of
producing, or from electrical shock.
1. Remove paver positioner from service, close
supply air shut off valve, and isolate
electrical power from power positioner.
2. Remove thermostat leads (9 and 10, Figure
8-4) from terminals 3 and 4 on terminal
block (3).
3. Remove screws (1 1), washers (12),
grounding lead (13), and thermostat (14)
from bracket (8).
4. Install new thermostat. Reattach ground lead.
5. Connect thermostat leads (9 and 10) to
terminals 3 and 4 on terminal block (3).