Honeywell Pressuretrol P7810A - Installation; Installation Precautions and Location

P7810A-D PRESSURETROL® CONTROLLER
3 65-0268—1
Table 3. Pressure Ratings (psig).
Fig. 1. Approximate dimensions of P7810 Pressuretrol® Controller in in. (mm). (P7810C,D shown;
P7810A,B dimensions are identical, except for door.)
INSTALLATION
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.
WARNING
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
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
RESET
PRESSURETROL
®
1/4 (6) 2x1-5/8 (41)
1-5/8 (41) 2-5/8 (67)
2x5-1/4 (133)
3-7/32 (82)
2-17/32
(82)
3-3/8 (86)
5
-1/4
(
133)
2x
3-3/16
(81)
2-1/8 (55)
4-23/32
(120)
2x27/32 (22)
DIAMETER
5-29/32 (150)
4-21/32 (119)
2-5/8
(67)
4
(102)
4-3/
4
(120
)
3/8
(10)
7/8
(22)
1
1
1
DIMENSIONS WITH DOOR IN OPEN POSITION.
M11893B
2
2
PIPE THREAD IS 1/4 INCH NATIONAL PIPE THREAD FOR P7810A,B; 1/2 INCH NATIONAL PIPE THREAD FOR P7810C,D.
3
3
3
WIRING COMPARTMENT ACCESS COVER.