P7810C,D PRESSURETROL
®
CONTROLLER
65-0235—1
4
Fig. 2. Connecting P7810C,D Pressuretrol®
Controller to steam boiler.
Mounting
IMPORTANT
1. Use pipe compound sparingly to avoid clogging hole
in pipe or sensor element fitting.
2. Do not hand tighten P7810C,D Pressuretrol®
Controller connection by holding the case. Use
wrench on flats of sensor fitting.
3. Level the P7810C,D Pressuretrol® Controller for
appearance.
Make all pipe connections in accordance with applicable local
standards. Use parallel jaw wrench to tighten P7810C,D
Pressuretrol® Controller hexagonal fitting to avoid leaks and
damage to the case.
Mounting P7810C,D Pressuretrol® Controller Next to
Pressure Gauge
To mount P7810C,D Pressuretrol® Controller next to
pressure gauge:
1. Remove pressure gauge.
2. Replace gauge with siphon loop with tee connector on
top.
3. Mount P7810C,D Pressuretrol® Controller and
pressure gauge on end of tee.
4. Level P7810C,D after installation.
Boiler Mounting
1. If not convenient to mount P7810C,D Pressuretrol®
Controller next to pressure gauge, install siphon loop in
the manufacturer provided fitting.
2. If no fitting, mount the siphon loop at the boiler
manufacturer recommended location.
3. Attach the P7810C,D Pressuretrol® Controller directly
to the siphon loop.
Remote Location Mounting
Excessive vibration at the boiler can damage P7810C,D
Pressuretrol® Controller electronics.
1. Mount the P7810C,D Pressuretrol® Controller at a
remote location to eliminate vibration problems.
2. Make sure that all piping from the boiler is suitable to
the application and solidly mounted.
3. Pitch the piping properly to drain the condensate back
to the boiler.
4. Mount the siphon loop between the remote piping and
the P7810C,D Pressuretrol® Controller.
5. Level the P7810C,D Pressuretrol® Controller after the
installation.
WIRING
WARNING
Electrical Shock Hazard.
Can cause electrical shock, serious injury
or death.
Disconnect the power supply before wiring. More than
one power supply disconnect can be involved.
All wiring must comply with applicable electrical codes,
ordinances and regulations. Use NEC Class 1 line voltage
wiring.
For normal installation, use moisture-resistant No. 14 wire
(maximum size allowed) suitable for at least 167
°
F (75
°
C) or
194
°
F (90
°
C) for Flame Safeguard Primary Controls.
For high temperature installations, use moisture-resistant No.
14 wire selected for temperature ratings above the maximum
operating temperature of 158
°
F (70
°
C).
Use shielded wire for 4 to 20 mA modulating output and
terminate the shield to earth ground. Do not run these wires
in the same conduit as high voltage ignition leadwires.
All P7810C,D Pressuretrol® Controllers have terminal screws
under the top cover and 27/32 inch (22 mm) holes in both
sides for conduit, cables and wiring. Remove the top cover by
loosening the screw at the top of the P7810C,D Pressuretrol®
Controller case.
See Fig. 3 for a firing rate wiring diagram. Follow the burner
or boiler manufacturer wiring diagrams, if provided. Make
sure the loads do not exceed the contact ratings in the
Specifications section. See Fig. 4 for typical wiring hookup.
P7810C,D
GAUGE
BOILER
M11891
7800 SERIES PROGRAMMER
HIGH FIRE
COMMON
MODULATE
LOW FIRE
9K1
9K2
8K2
8K1
F
-
14
–
+
MODUTROL®
MOTOR
P7810
CONTROLLER
M17130
Fig. 3. Firing rate wiring diagram using 4 to 20 mA
controller and Series 70 Modutrol® Motor.