Honeywell P7810A, P7810B, P7810C, P7810D Product Data

P7810C, D

P7810A, B

P7810A-D

Pressuretrol® Controller

PRODUCT DATA

FEATURES

• Use only with steam, air or noncombustible gases that
do not corrode the pressure sensing element.

• Models available with on-off control function, on-off
control and modulate, high limit and modulate, and
on-off control and safety high limit functions.

• Models available in 15, 150 and 300 psi (103, 1034 and
2069 kPa) maximum setpoints.

• LED indicators show power, call for heat function and
lockout status.

• Clear cover allows setpoint and differential to be read,
but not adjusted, without opening cover, (Cover
optional for P7810A,B models.)

• Manual reset possible without opening cover.

• Electronic maximum fixed stop limit.

APPLICATION

The P7810 Pressuretrol® Controller is a line voltage pressure
controller for pressure systems up to 300 psi (2069 kPa). Four
models are available:

• P7810A—On/Off Control

• P7810B—On/Off Control with 4 to 20 mA modulation.

• P7810C—On/Off Control, High Limit and 4 to 20 mA
modulation.

• P7810D—On/Off Control with High Limit.

® U.S. Registered Trademark
Copyright © 2002 Honeywell • All Rights Reserved

Contents

Application ........................................................................ 1

Features ........................................................................... 1

Specifications ................................................................... 2

Ordering Information ........................................................ 2

Installation ........................................................................ 3

Wiring ............................................................................... 5

Operation .......................................................................... 7

Checkout .......................................................................... 11

Troubleshooting ................................................................ 12

Service Information .......................................................... 12

65-0268-1

P7810A-D PRESSURETROL® CONTROLLER

SPECIFICATIONS

Models:

P7810A Pressuretrol® Controller with on/off control.
P7810B Pressuretrol® Controller with on/off control and

modulate.

P7810C Pressuretrol® Controller with on/off control; modulate

and safety high limit.

P7810D Pressuretrol® Controller with on/off control and

safety high limit.

Electrical Ratings:

Power Input: 120 Vac (10%/-15%), 50/60 Hz.
Power Consumption: See Table 1.

Table 1. Power Consumption.

120 Vac

Rating

Watts 2.8 2.8

VA 7.0 7.0

Switch Contact Ratings: See Table 2.

Table 2. Switch Contact Ratings.

Relay Load Type 120 Vac

Control Amps Full Load (FLA) 9.8A

Amps Locked Rotor (ALR) 58.8A

Non-Inductive 10.0A

a

Alarm

a

P7810C,D models only.

Sensor Material: 304 stainless steel.

Pressure Connector:

P7810A,B: 1/4 in. NPT.
P7810C,D: 1/2 in. NPT.

Case Material: Plastic.

Pilot Duty 1.0A

50 Hz 60 Hz

Electrical Terminations: Screw terminals.

Accuracy: ±4.0 percent full scale output operating range,

over operating temperature.

Environmental Ratings:

Operating Temperature Range: 32°F to 140°F (0°C to 60°C).
Storage Temperature Range: -20°F to +150°F (-29°C to

+66°C).
Humidity: 5% to 95% relative humidity, noncondensing.
Vibration: 0.5G continuous maximum vibration.

Dimensions: See Fig. 1.

Mounting Position: Upright, see Fig. 2.

Device Weight: 2.0 lb, 8 oz (1.15 kg).

Approvals:

Underwriters Laboratories Inc. Listed.
Canadian Standards Association Listed: Pending.
Factory Mutual Approved: Pending.
CSD-1 AFB (Control Safety Devices, Automatic Fired Boilers):

Acceptable.
FCC Class B, computing devices, part 15.

Accessories:

14026 Siphon Loop with 1/4 in. NPT threads.
205860 Minimum Position Potentiometer for Series 70

Motors.
209731A Siphon Loop with 1/2 in. NPT threads.
4074EWC Door Assembly with captive screw and adjusting

wrench (accessory for P7810A, B).
4074EWD Mounting Bracket with six screws.
4074EDC or EED Bag Assembly to interface 4 to 20 mA with

Series 90 Firing Rate Motor.

Replacement Parts:

4074EWC Door Assembly with captive screw and adjusting

wrench (replacement part for P7810C,D).
4074EVP Door Wrench.

Pressure Ratings: See Table 3.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:

1. Your local Home and Building Control Sales Office (check white pages of your phone directory).

2. Home and Building Control Customer Relations

Honeywell, 1885 Douglas Drive North

Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

65-0268—1 2

P7810A-D PRESSURETROL® CONTROLLER

5

(

4

)

Table 3. Pressure Ratings (psig).

Pressure Range Maximum Setpoint Differential Overpressure Burst Pressure

0 to 15 15 2 to 10 22.5 60

0 to 150 150 5 to 20 225 600

0 to 300 300 15 to 50 450 1200

1/4 (6) 2x1-5/8 (41)

-1/4

133)

2x

3-3/16

(81)

1-5/8 (41) 2-5/8 (67)

3-7/32 (82)

DIMENSIONS WITH DOOR IN OPEN POSITION.

1

PIPE THREAD IS 1/4 INCH NATIONAL PIPE THREAD FOR P7810A,B; 1/2 INCH NATIONAL PIPE THREAD FOR P7810C,D.

2

WIRING COMPARTMENT ACCESS COVER.

3

2-17/32

(82)

3-3/8 (86)

1

2x27/32 (22)
DIAMETER

3

1

2-1/8 (55)

4-23/32

(120)

4-21/32 (119)

3

RESET

2x5-1/4 (133)

PRESSURETROL

2

5-29/32 (150)

®

2-5/8

(67)

4

(102)

4-3/
(120

3/8

(10)

7/8

(22)

M11893B

Fig. 1. Approximate dimensions of P7810 Pressuretrol® Controller in in. (mm). (P7810C,D shown;

P7810A,B dimensions are identical, except for door.)

INSTALLATION

WARNING

When Installing This Product…

1. Read instructions carefully. Failure to follow them could

damage the product or cause a hazardous condition.

2. Check ratings (pressure and voltage, for example) and

description given in the specifications to make sure the
product is suitable for your application.

3. Installer must be a a trained, experienced flame

safeguard technician.

4. After installation is complete, check out product

operation as provided in these instructions.

Electrical Shock Hazard and Explosion Hazard.
Can cause severe injury, death or property
damage.

1. Disconnect power before installation. More than one
disconnect may be involved.

2. Allow pressure to decrease to atmosphere from the
pressure vessel before removing old control.

3. Follow all installation and checkout procedures for
safe installation.

IMPORTANT

Do not remove the overpressure inlet seal until ready
to connect piping to prevent contamination of inlet.

Location

Install the P7810 Pressuretrol® Controller above the boiler
water line when used with steam boilers. Connect the siphon
loop (part number 14026—for P7810A,B; 209731A—for
P7810C,D,or equivalent) between the P7810 Controller and
the boiler to prevent scale and corrosive vapors from
attaching the controller sensor element. Mount the P7810

3 65-0268—1

P7810A-D PRESSURETROL® CONTROLLER

(

PRESSURE

A

Controller next to the pressure gauge in the
manufacturer-provided fitting on the boiler. See Fig. 2 and 4.
Mount at a remote location to avoid excessive vibration, or
mount in a special mounting on a low water cutoff.

IMPORTANT

1. Locate the P7810 Pressuretrol® Controller where
ambient temperature does not exceed 140°F (60°C).

2. Use pipe compound sparingly to avoid clogging the
hole in the pipe or the sensor element fitting.

3. Do not hand tighten the controller connection by
holding the case. Use a wrench on the flats of the
sensor fitting to avoid leaks and damage to the case.

4. Level the controller for appearance.

5. Install the P7810 where the relative humidity never
reaches the saturation point. The P7810 is designed
to operate in a maximum 85 percent relative
humidity, continuous, noncondensing moisture
environment. Condensing moisture can cause a
shutdown.

6. Do not install the P7810 where it could be subjected
to vibration in excess of 0.5G continuous maximum
vibration.

7. The P7810 is not designed to be weather tight. If
installed outdoors, protect the P7810 with an
approved weather-tight enclosure.

GAUGE

1

INCORRECT

BOILER

2-1/4
(57.2)
DIA.

M8934

4-1/2 TO 5-1/2

114.3 TO 139.7)

1

1/4 IN. BLACK IRON PIPE WITH 1/4 - 18 NPT EXTERNAL
TRHEADS ON BOTH ENDS. BEND THE STEAM TRAP
(SIPHON LOOP) TO LEVEL THE CONTROLLER.

PRESSURE
CONTROLLER

TEE

CORRECT

BOILER

14026
STEAM TRAP
(SIPHON LOOP)

Fig. 3. Right and wrong mounting of steam trap (siphon

loop) for the L404 Pressuretrol® Controller, with

approximate dimensions in in. (mm).

CAUTION

Equipment Damage Hazard.
Incorrect installation of the L404 Pressure
Controller can damage the equipment and may
require boiler replacement.

Install the L404C Pressuretrol® as shown in Fig. 2 and
3 to prevent equipment damage.

P7810A,B L404C

LIMIT

SIPHON
LOOP

L91 GAUGE

MOD.

BOILER

Mounting

Make all pipe connections in accordance with applicable local
standards. Use parallel jaw wrench to tighten P7810
Controller hexagonal fitting to avoid leaks and damage to the
case.

Mounting P7810 Controller Next to Pressure Gauge

To mount the P7810 Pressuretrol® Controller next to the
pressure gauge:

1. Remove the pressure gauge.

2. Replace the gauge with a siphon loop with tee

connector on top.

P7810C,D

BOILER

GAUGE

M4879B

Fig. 2. Connecting P7810A,B Pressuretrol® Controller to

steam boiler.

Fig. 4. Connecting P7810C,D Pressuretrol® Controller to

M11891

steam boiler.

65-0268—1 4