Page 1
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
Page 2
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
Page 3
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
Page 4
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
Page 5
P7810A-D PRESSURETROL® CONTROLLER
1
3. Mount the P7810 Controller and pressure gauge on the
end of the tee.
4. If not convenient to mount the P7810 Controller next to
the pressure gauge, install a siphon loop in the
manufacturer provided fitting.
5. If there is no fitting, mount the siphon loop at the boiler
manufacturer recommended location.
6. Attach the P7810 Controller directly to the siphon loop.
7. Level the P7810 Controller after the installation.
NOTE: The P7810C,D models require 1/2 in. (13 mm)
mounting either directly or on a siphon loop.
Remote Location Mounting
Excessive vibration at the boiler can damage the P7810
Controller electronics.
1. Mount the P7810 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 P7810 Controller.
5. Level the P7810 Controller after the installation.
WIRING
All P7810 Pressuretrol® Controllers have terminal screws and
27/32 in. (22 mm) holes in both sides for conduit, cables and
wiring. Remove the top cover by loosening the screw at the
top of the P7810 Controller case.
Follow the burner or boiler manufacturer wiring diagram, if
provided. Make sure the loads do not exceed the contact
ratings in the Specifications section. See Fig. 5 for terminal
locations and Fig. 6 through 10 for typical wiring hookups.
Replace the front cover after completing the wiring.
LINE VOLTAGE
1/4 IN. NPT
STEAM
PRESSURE
CONTROL
SENSOR
/4 IN. NPT
STEAM
PRESSURE
HIGH LIMIT
CONTROL
SENSOR
1/2 IN. NPT
1
+mA -mA
(MODULATE)
OUTPUT
NPT
ALARM
L2
GND
1
L1
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect the power supply before wiring. More than
one power supply disconnect may 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.
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 wires.
1 USE COPPER CONDUCTORS ONLY
M11895D
Fig. 5. P7810C,D Pressuretrol® Controller.
PROGRAMMER WIRING
HIGH FIRE
COMMON
MODULATE
LOW FIRE
MODUTROL®
MOTOR
F
-
+
P7810
CONTROLLER
–
+
M17130A
Fig. 6. Firing rate wiring diagram using 4 to 20 mA
controller and Series 70 Modutrol® Motor.
5 65-0268—1
Page 6
P7810A-D PRESSURETROL® CONTROLLER
.
.
C
.
C
S.
C
S.
L1
®
L2
M11892D
7800 SERIES
PROGRAMMER
8K1
8K2
9K1
9K2
FIELD WIRING
7800 SERIES SHOWN. REFER TO SPECIFICATIONS PACKED WITH THE
1
PROGRAMMER FOR WIRING OF OTHER PRIMARY SAFETY CONTROLLERS
MODUTROL® MOTOR MUST BE MODUTROL III OR MODUTROL IV,
2
SERIES 90, ELECTRONIC BALANCE RELAY TO OPERATE AS SHOWN.
PART OF 4074EDC OR 4074EED BAG ASSEMBLY ORDERED SEPARATELY
3
ALARM ON C AND D MODELS ONLY.
4
1
HIGH
3
COMMON
MODULATION
3
LOW
12
237
OHM
13
15
66.5
OHM
14
L2
120 VAC LINE
VOLTAGE
MODUTROL®
MOTOR
6
4
DEVICE WIRING
P7810 PRESSURETROL
2
CONTROLLER
B
R
–
4 TO 20mA
W
OUTPUT
+
ALARM
1K1
2K1
3K1
4
120 VAC LINE
VOLTAGE
Fig. 7. Wiring diagram for typical P7810 installation using
Series 90 Modutrol® Motor.
24V AC
SERIES 70
(M7284)
MODUTROL IV
MOTOR
F
–
+
–
+
CONTROLLER
P7810
(4-2O mA)
AUTO
–
+
MAN
REMOTE
MINIMUM
POSITION
POTENTIONMETER
205860
1
2
3
4
2
M20569
1
7800 SERIES
PROGRAMMER
HIGH FIRE
8K1
COMMON
8K2
MODULATE
9K1
9K2
LOW FIRE
1
7800 SERIES SHOWN. REFER TO SPECIFICATIONS PACKED WITH THE
PROGRAMMER FOR WIRING OF OTHER PRIMARY SAFETY CONTROLLER
2
ONLY 50% MOTOR AUTHORITY IS AVAILABLE WHEN USING THE 205860
POTENTIOMETER WITH THE SWITCH IN THE MANUAL POSITION.
12
13
15
14
MOD MOTOR
Fig. 9. Series 70 Motor with auto/manual switch, using
205860 Minimum Position Potentiometer.
8K1
8K2
9K2
1
7800 SERIES
PROGRAMMER
HIGH FIRE
COMMON
MODULATE
9K1
LOW FIRE
1
12
237
OHM
13
15
66.5
OHM
14
7800 SERIES SHOWN. REFER TO SPECIFICATIONS PACKED WITH THE
PROGRAMMER FOR WIRING OF OTHER PRIMARY SAFETY CONTROLLERS
SERIES 90
MODUTROL IV
MOTOR
1K
OHM
CONTROLLER
P7810
AUTO
MAN
(4-2O mA)
–
+
M20568
B
R
W
Fig. 8. Firing rate wiring diagram using P7810B,C
Pressuretrol® Controller and Series 90 Modutrol® Motor
with manual position potentiometer and auto-manual
switch.
1
7800 SERIES
PROGRAMMER
HIGH FIRE
8K1
COMMON
8K2
MODULATE
9K1
9K2
LOW FIRE
1
7800 SERIES SHOWN. REFER TO SPECIFICATIONS PACKED WITH THE
PROGRAMMER FOR WIRING OF OTHER PRIMARY SAFETY CONTROLLER
12
13
15
14
SERIES 70
(M7284)
MODUTROL IV
MOTOR
F
–
OHM
5K
CONTROLLER
P7810
(4-2O mA)
AUTO
–
++
MAN
–
12V DC
+
M20570
Fig. 10. Series 70 Motor with auto/manual switch and 12
Vdc source.
65-0268—1 6
Page 7
OPERATION
C
B
M
2
P7810A-D PRESSURETROL® CONTROLLER
The P7810 uses integral electronic pressure sensors to sense
pressure at the inlet through an internal manifold. The control
sensor connects to the internal manifold with 1/4 inch NPT
threads and provides the pressure signal to control a relay for
the on/off control function. The same sensor provides the
information for the 4 to 20 mA firing rate modulation output.
A separate integral electronic pressure sensor is required to
provide the high limit function. This sensor also connects to
the internal manifold with 1/4 in. NPT threads. P7810C,D
devices contain two internal sensors and require a 1/2 inch
NPT mounting to the steam pressure header. Devices with
high limits lockout at setpoint and require manual reset when
pressure returns below the setpoint. Devices will not reset
with power interruption.
The P7810A is an on/off pressure control to start and stop a
burner system through a flame safeguard control. A 1/4 inch
NPT mounting is required to the steam pressure header.
The P7810B combines the on/off function of the P7810A with
providing a 4 to 20 mA modulation control output. A 1/4 inch
NPT mounting is required to the steam pressure header.
The P7810C has on/off function, 4 to 20 mA modulation
control output, and safety high limit function in one control. A
1/2 inch NPT mounting is required to the steam pressure
header.
The P7810D has on/off function and safety high limit function
in one control. A 1/2 inch NPT mounting is required to the
steam pressure header.
Modulate Control Function (P7810B,C Only)
When the pressure decreases to or below the modulation
setpoint, the current is 20 mA. The current remains constant
at all pressures below the modulation setpoint.
The modulation range is an additive value to the modulation
setpoint value.
When the pressure increases above the modulation setpoint,
the current decreases linearly until the modulation range point
is reached. The output current is 4 mA at and above this
pressure. See Fig. 12.
20 mA
ODULATION
CURRENT
4 mA
MODULATION
SETPOINT
PRESSURE
Fig. 12. P7810B,C modulation current versus pressure.
MODULATION
RANGE
M488
Limit Function (P7810C,D only)
Pressure On/Off Control Function (P7810A,B,C,D)
When pressure increases to the control setpoint, the control
relay contacts open. The relay contacts close when the
pressure decreases to a level at or below (differential) the
control range differential setting. This cycle continues until
power is removed, opening the relay. See Fig. 11.
The Limit potentiometer has two functions:
a. To set the Maximum Fixed Stop Limit. This is the
maximum pressure setting that the P7810C or D
control can be adjusted to and still perform its
intended function (i.e., safety shutdown).
CAUTION
ON
ONTROL
RELAY
(K)
OFF
CONTROL
RANGE
DIFFERENTIAL SETTING
PRESSURE
CONTROL
SETPOINT
M4881
Fig. 11. P7810 on/off control function versus pressure.
Equipment Damage Hazard.
Exceeding pressure vessel limits can damage
equipment.
The Maximum Fixed Stop Limit pressure setting
must not
exceed the maximum working pressure
rating of the pressure vessel. Adjust the Maximum
Fixed Stop Limit setting to the maximum working
pressure rating that is stamped on the pressure vessel
by the manufacturer.
b. To set the High Limit Setpoint. This is the desired
pressure value to which the P7810C or D control is
adjusted and at which it performs its intended
function (i.e., safety shutdown).
The High Limit Setpoint can be set lower than the internal
stored Maximum Fixed Stop Limit Value and will provide
system lockout at the knob setting. For example, the internal
stored Maximum Fixed Stop Limit Value is 12 psi and the knob
is set at 10 psi. System lockout is at 10 psi. The LED pattern
will be green on and yellow blinking slowly.
7 65-0268—1
Page 8
P7810A-D PRESSURETROL® CONTROLLER
The High Limit Setpoint can be set above the internal stored
Maximum Fixed Stop Limit Value but it will have no functional
effect. For example the internal stored Maximum Fixed Stop
Limit Value is 12 psi and the knob is set at 14 psi. Lockout will
occur at 12 psi. the LED pattern will be green on and yellow
blinking fast.
When pressure increases to the high limit setpoint, the (1K1,
2K1) relay contacts open and the P7810C,D indicates a safety
lockout by alternately flashing the yellow and green LEDs.
Table 4. Reset Switch Function, P7810A,B.
Reset Switch Action
Press and Continuously Hold Blink existing fault code until the reset
switch is released.
Press and Release Clear the fault code and reset the P7810. Resets the control.
P7810 Pressuretrol® Controller Setup
For P7810B,C and D Pressuretrol® Controllers with more
than one function(control, modulate and high limit [P7810C
and D]), adjust setpoints and differentials separately for each
function.
The P7810C,D remains in this condition until the manual reset
button (see Fig. 1) is pressed. The Alarm (3K1) relay contacts
will close, providing a 120 Vac output on the Alarm terminal.
Reset Switch Functions
The Reset Switch has the functions listed in Tables 4 and 5.
P7810A,B Modes of Operation
Lockout (Run) Normal Operation
The green LED turns off and the yellow
LED turns on, waiting until the reset
switch is released.
Setting Maximum Fixed Stop Limit Value (P7810C,D)
CAUTION
Equipment Damage Hazard.
CAUTION
Equipment Damage Hazard.
Improper setting of control setpoint and control
range knob errors can damage the P7810.
Do not set control setpoint or control range knob
arrows past the scale plate endpoints.
Adjust setpoints and differentials using the knobs on the front
of the P7810 Pressuretrol® Controller.
Set the knobs to the desired points by aligning the center of
the knob arrow with the desired mark on the scale plate. See
Fig. 13.
SCALE
PLATE
DIAL ARROW
Fig. 13. Setting control setpoint and control range knobs.
IMPORTANT
P7810C,D devices must set Maximum Fixed Stop
Limit Value function first.
M4880A
IMPORTANT
Exceeding pressure vessel limits can damage
equipment.
The Maximum Fixed Stop Limit pressure setting
must not
rating of the pressure vessel. Adjust the Maximum
Fixed Stop Limit setting to maximum working
pressure rating that is stamped on the pressure vessel
by the manufacturer.
The Maximum Fixed Stop Limit Value must be
programmed first for the P7810C or D to operate.
1. Initial Startup—Maximum Fixed Stop Limit Value is
unprogrammed.
a. Green LED (Control LED)—Blinking rapidly (1/2
b. Yellow LED (Power LED)—On steady and bright.
2. Setting the Maximum Fixed Stop Limit Value.
a. Monitor the 4 to 20 mA output. Long filtering delays
b. Turn the Limit Setpoint knob to the desired setting
c. Press and hold the Reset Switch.
d. Release the Reset Switch when both LEDs turn on.
e. The Maximum Fixed Stop Limit Value is set and the
f. After an accumulated run time (Call for Heat) of one
exceed the maximum working pressure
second on, 1/2 second off).
cause a lag between the 4 to 20 mA output and the
limit setting, i.e., 20 to 25 seconds for a full scale
change.
and confirm by comparing the current noted to the
corresponding reading in Table 6. Ensure that the
mA output is stable before using the value.
device will recycle and attempt to enter Run mode.
hour, the Maximum Fixed Stop Limit Value setting
will be permanently stored in the P7810C,D
memory. Changing the Maximum Fixed Stop Limit
Value setting after this time will then be ineffective.
65-0268—1 8
Page 9
Reset Switch
Action
Press and
Continuously Hold.
Press and release. Clear the fault code
Lockout Unconfigured
Blink existing fault
code until the reset
switch is released.
and reset the
P7810.
P7810A-D PRESSURETROL® CONTROLLER
Table 5. Reset Switch Function, P7810C,D.
P7810C,D Modes of Operation
(Run) Normal
Operation
Both LEDs turn on
after three seconds,
indicating the
Maximum Fixed
Stop Limit Value has
been stored. Wait
for up to 30 seconds
for a release. Enter
lockout after 30
seconds.
Press and release
of the Reset button
within three
seconds is ignored.
If the Reset button
is pressed for more
than three seconds,
both LEDs turn on
and the Maximum
Fixed Stop Limit
Value is stored into
non-volatile (NV)
memory. Upon
release, the device
will recycle and
enter normal
operation.
The green LED
turns off and the
yellow LED turns
on, waiting until the
reset switch is
released.
Resets the control. Enter normal
Power-up
(Configuration
Time Expired)
Both LEDs turn on.
Wait for up to 30
seconds for a
release. Lockout
after 30 seconds. If
released within 30
seconds, enter
normal operation.
operation.
Power-up
(Configuration
Time Not Expired)
Enter unconfigured
mode of operation.
Enter unconfigured
mode of operation.
Table 6. Setting Maximum Fixed Stop Limit Value—
Current Readings.
15 psi 150 psi 300 psi 4-20 mA Output
00 0 4.00
110205.07
220406.13
330607.20
440808.27
5 50 100 9.33
6 60 120 10.40
77014011.47
8 80 160 12.53
9 90 180 13.60
10 100 200 14.67
11 110 220 15.73
12 120 240 16.80
13 130 260 17.87
14 140 280 18.93
15 150 300 20.00
Changing the Maximum Fixed Stop Limit Value Setting (if Run Time is less than one hour)
1. Remove power from the P7810C,D.
2. Press and hold the Reset Switch, then apply power to
the P7810C,D.
3. When the green LED blinks rapidly, release the Reset
Switch.
4. Follow the steps in Setting the Maximum Fixed Stop
Limit Value, above.
NOTE: If both LEDs turn on, the configuration timer (one
hour) has expired. Release the Reset button and
continue normal operation. Changing the Maximum
Fixed Stop Limit Value Setting is no longer allowed.
Checking the Maximum Fixed Stop Limit Value (Stored in Memory)
NOTE: The P7810C,D must be powered and in the Run
mode.
9 65-0268—1
Page 10
P7810A-D PRESSURETROL® CONTROLLER
1. Record the original location of the Limit setpoint knob.
Make sure that the Limit setpoint knob is set (moved to)
a lower value than the Maximum Fixed Stop Limit Value
setpoint. The green LED will be reflective of the call for
heat status and the yellow LED will blink slowly.
IMPORTANT
Do not decrease the Limit Setpoint knob far enough
to cause a lockout.
2. Very slowly increase the Limit setpoint knob until the
yellow LED begins to blink fast. The current position of
the Limit setpoint now represents the Maximum Fixed
Stop Limit Value setpoint stored in memory.
3. Return the Limit setpoint knob to the original location
(step 1).
Setting High Limit Set Point (P7810C,D)
After the Maximum Fixed Stop Limit Value has been stored
into memory, adjust the Limit Setpoint knob to the desired
pressure value at which safety shutdown (lockout) will occur
when the vessel pressure exceeds this setpoint value.
NOTE: The High Limit setpoint value can be less than or
equal to the Maximum Fixed Stop Limit Value but
cannot be set to a value higher than the Maximum
Fixed Stop Limit Value.
Pressure On/Off Control (P7810A,B,C,D)
Adjust the setpoint and differential using the potentiometer
knobs on the front of the controller. The differential is a
subtractive value from the setpoint adjustment. The upper
operating point is determined by the control setpoint, while the
lower operating point is determined by the control range
setting (control setpoint minus the differential setting).
Yellow light emitting diode (LED) ON constantly indicates
power applied; green LED On indicates closed contact or call
for heat.
Modulate Control (P7810B,C Only)
The P7810B,C adds 4 to 20 mA modulation output and uses
two additional potentiometers. The pressure sensor output is
fed to an error and gain amplifier to perform the modulation
determined by the control potentiometer settings.
The potentiometer knobs mounted on the P7810B,C face
adjust the current output for a given set of pressures.
The modulation range is an additive value to the modulation
setpoint value.
LED Display (Tables 7 and 8)
The yellow LED is always lit with power applied to the P7810
Pressuretrol® Controller. The microprocessor changes the
brightness of the yellow LED to indicate normal operation,
turns the green LED on and off to indicate call for heat status
and flashes both LEDs to indicate a fault.
NOTE: The term “flashing” means on/off/on/off for the green
LED and bright/dim/bright/dim for the yellow LED.
Press and hold the Reset Switch to access internal
diagnostics. The green (right) LED will flash a series of long
followed by a series of short flashes. Count the long and short
flashes and check the fault code table (Table 8) for
information. For example: four long and three short flashes is
code 43. If you miss the code the first time, keep holding the
Reset Switch down and the code will repeat. Letting go of the
Reset Switch clears the fault information and resets the
P7810.
Set the potentiometer knobs to the desired point by aligning
the center of the arrow on the potentiometer knob with the
desired mark on the scale plate. See Fig. 13.
Table 7. P7810 Blink Codes.
Yellow Green Control State
Off Off Device off.
No LEDs blinking Device on, Central Processing Unit (CPU) malfunction.
Slow Blink Off Run mode, output off, Limit potentiometer setpoint used.
Slow Blink On Run mode, output on, Limit potentiometer setpoint used.
Fast Blink Off Run mode, output off, Internal Maximum Fixed Stop Value setting
used.
Fast Blink On Run mode, output on, Internal Maximum Fixed Stop Value setting
used.
Alternating Fast Blinks Lockout, output off, high limit exceeded, Alarm output engaged.
Simultaneous Fast Blinks Lockout, output off, internal fault, Alarm output engaged.
On, Bright Fast Blink Output off, internal Maximum Fixed Stop Value setting not set.
65-0268—1 10
Page 11
P7810A-D PRESSURETROL® CONTROLLER
Table 8. LED Fault Codes and Recommended Troubleshooting.
Fault Code System Failure Recommended Troubleshooting
11 High Limit Setpoint Exceeded. When pressure in vessel returns to normal, P7810 can be reset.
12-32,
71-90, 92
51, 54, 61 Internal fault—internal relays
52-69, 91 Relay fault Verify that no voltage potential exists on Output terminal.
Internal fault Reset P7810; if same fault occurs again, replace P7810.
Verify loads do not exceed rating of P7810 contacts, then replace P7810.
welded
If code repeats after normal operation, look for back feed of voltage greater
than 50V (ac or dc) any time during boiler sequence.
Replacing P7810 will only result in same lockout on new control.
CHECKOUT
WARNING
Electrical Shock Hazard and Explosion Hazard.
Can cause severe injury, death or property
damage.
1. Live voltage is present at the P7810 and all
controller circuits. Use extreme care during
checkout.
2. This checkout procedure disables the Safety High
Limit function.
IMPORTANT
1. Do not put the system into service until all applicable
tests described in the Checkout section of the
instructions for the primary safety control and any
additional tests required by the burner or boiler
manufacturer are satisfactorily completed.
2. Close all manual fuel shutoff valves when trouble
occurs.
After installation and wiring, check out the P7810
Pressuretrol® Controller with the system in operation.
Checkout
1. Allow the system to stabilize.
2. Observe the operation of the P7810 while raising and
lowering the setpoint. Pressure increases when the
setpoint is increased and decreases when the setpoint
is decreased.
3. Check the make and break points of the P7810. If they
do not agree with a separate, accurately calibrated
pressure gauge, make a slight adjustment according to
the scale. Use accurate pressure testing equipment
when checking out the P7810. Do not rely on
inexpensive gauges. The P7810 is carefully calibrated
at the factory.
Test the P7810 Pressuretrol® Controller as follows:
NOTE: Make sure the P7810 is operating properly by
checking the LED indicators. If the P7810 LEDs
indicate a lockout condition, press the manual reset
button.
NOTE: This procedure simulates pressure changes using
knob setpoint adjustments. Make knob adjustments
very slowly because of filtering delays within the
P7810 (20 to 25 seconds for full scale change).
Inaccuracy can result if knob adjustments are not
made very slowly. To observe actual P7810 control
accuracy, set the knobs to normal operating values.
Compare the knob settings to the boiler pressure
readings where P7810 actions occur.
To check the control setpoint of the P7810A,B,C,D:
1. Note the boiler pressure by checking the boiler pressure
gauge. To properly perform these tests, the boiler
pressure should be near the middle of the P7810
pressure range.
2. Turn the P7810 limit setpoint knob fully clockwise to
make sure this limit does not interfere during steps 4
and 5. This setting must return to the proper operating
position when returning the system to normal operation.
3. Check the control setpoint and control differential.
4. Set the control differential knob to the center of its
range.
5. Turn the control setpoint knob fully counterclockwise
and make sure the P7810 control circuit is open and the
green LED is off (no call for heat).
6. Read the boiler pressure gauge and add this number to
the control differential setting.
7. Turn the control setpoint knob slowly clockwise and
make sure the control circuit closes and the P7810 indicates a call for heat (green LED on) when the P7810
control setpoint passes through the value determined in
step 6.
8. Turn the control setpoint knob slowly counterclockwise
and make sure the control circuit opens and the P7810
no longer indicates a call for heat (green LED off) when
the control setpoint passes through the boiler pressure
gauge value.
Check the modulation setpoint and modulation range of the
P7810B,C as follows:
1. Set the P7810 modulation range knob to the center of
the range.
2. Turn the modulation setpoint knob fully clockwise and
make sure the firing rate motor travels to the fully open
position (boiler is firing).
3. Turn the modulation setpoint knob slowly
counterclockwise and make sure the firing rate motor
starts moving toward the closed position when the
modulation setpoint passes through the boiler pressure
gauge value. (Alternately, make sure the current starts
decreasing toward 4 mA.)
11 65-0268—1
Page 12
4. Determine the pressure point at which minimum
modulation output will occur by checking the boiler
pressure gauge and subtracting the modulation range
knob setting (at midpoint).
5. Turn the modulation setpoint knob slowly
counterclockwise and make sure the firing rate motor
continues to move to the closed position. Make sure the
firing rate motor reaches the lowfire position when the
modulation setpoint reaches the pressure point
identified in step 4 above. (Alternately, make sure the
measured current decreases gradually toward 4 mA.)
Check the limit setpoint as follows (boiler pressure required):
1. Turn the control setpoint knob clockwise until the control
circuit closes. Make sure the yellow LED is flashing and
the green LED is on, indicating normal operation with a
call for heat.
2. Turn the limit setpoint knob slowly counterclockwise and
make sure that the P7810 opens the circuit and indicates a safety lockout by alternately flashing the yellow
and green LED (see LED Display section) when the limit
setpoint passes through the boiler pressure gauge
value.
3. Make sure that the Alarm output is energized.
Check for normal system operation as follows:
1. Set all knobs to the required operating position.
2. Press the reset button to clear the safety lockout
condition.
3. Start the system and observe the operation through at
least one complete cycle to make sure the P7810
functions properly as described in the Operation
section.
TROUBLESHOOTING
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Line voltage is present at the P7810 and in all
controller circuits. Use extreme care when
troubleshooting.
To determine control malfunctions, use checkout procedures
as listed in the Checkout section.
CAUTION
Equipment Damage Hazard.
Can cause equipment damage or improper
operation.
Do not put the system into service until you have
satisfactorily completed all applicable tests described
in this checkout section, and also all tests in the
Checkout section of the applicable instructions for the
primary safety control and any other tests the burner
and boiler manufacturer require.
SERVICE INFORMATION
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
1. Only qualified Flame Safeguard technicians should
attempt to service Flame Safeguard controls and
burners.
2. Line voltage is present in the electrical circuits to the
P7810 Pressuretrol® Controller. Open the master
electrical switch before replacing the device. More
than one power supply disconnect may be involved.
Scheduled Inspection and Maintenance
Calibration
The P7810 Pressuretrol® Controller was carefully calibrated
during manufacturing and does not require field calibration.
Maintenance
Keep the cover of the P7810 Pressuretrol® Controller in place
at all times to protect the internal components from dust, dirt
and physical damage. Routine maintenance consists of
occasional inspection and removal of accumulated dirt and
dust. Make sure the P7810 Pressuretrol® Controller is
functioning properly by performing an operation check of the
entire system during routine maintenance checks.
Automation and Control Solutions Honeywell International Honeywell Europe S.A. Honeywell Latin American
Honeywell Honeywell Limited-Honeywell Limitée Control Products 3 Avenue du Bourget
1985 Douglas Drive North 35 Dynamic Drive Honeywell Building 1140 Brussels 480 Sawgrass Corporate Parkway
Golden Valley, MN 55422 Scarborough, Ontario 17 Changi Business Park Central 1 Belgium Suite 200
65-0268—1 G.R. Rev. 08-02 www.honeywell.com
M1V 4Z9 Singapore 486073 Sunrise FL 33325
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
Region
Loading...