Repair And Replacement - Johnson Controls P736 Serie Manual De Instrucciones

2
Note
The controls are intended to control
equipment under normal operating
conditions. Where failure or malfunctioning
of the controls could lead to an abnormal
operating condition that could cause
personal injury or damage to the equipment
or other property, other devices (limit or
safety controls) or systems (alarm or
supervisory systems) intended to warn of
or protect against failure or malfunctioning
of the controls must be incorporated into
and maintained as part of the control
system.
Type number matrix
P736LCA Automatic reset both sides
P736MCA Automatic reset low side manual
reset high side
P736PGA Manual reset both side
P736LCW Automatic reset both sides
Conforming PED 97/23CE
P736MCB Aut. res. LP side, Man. res.HP limit
Conforming PED 97/23CE
P736MCS Aut. res. LP side, Man. res. HP
safety limit. Conforming PED
97/23CE
P736PGB Manual reset both sides
Conforming PED 97/23CE
P736ALA Dual fan cycling control (2 x SPST
close high)
Adjustment
On most models the range scale indicates the
high switch point (exception: LP side of
P736PGA, P736PGB, here the range scale
indicates the low switching point). To obtain
low switch point deduct differential value from
the high switch point.

Repair and replacement

Repair is not possible. In case of an improperly
functioning control, please check with your
nearest supplier. When contacting the supplier
for a replacement you should state the
type/model number of the control. This number
can be found on the data plate.
Catalogue Section 6
Contact functions
(see also "Type Number Selection" table)
A
Line ~
max. 20 A
LP
LP. A - C opens on pressure decrease
A - B closes simultaneously
HP. A - C opens on pressure increase
A - D closes simultaneously
Fig. 1
A
Line ~
max. 20 A
HP
Left side HP. A - C opens on pressure increase
A - B closes simultaneously
Right side HP. A - C opens on pressure increase
A - D closes simultaneously
Fig. 2
Switching action P736ALA
A - D closed
(fan 2 ON)
A - D open
(fan 2 OFF)
A - B closed
(fan 1 ON)
A - B open
(fan 1 OFF)
D
cut-in point
D = diferential per stage (fixed)
Fig.3a
A
L in e ~
max. 20 A
HP
Fig. 3b
P736
Issue 23/03/2004
D
C
M
HP
B
B
D
C
M
HP
D
P
pressure
S1 S2
increase
cut-in point
fan 1 fan 2
B D
HP
M1 M2
© 2004 Johnson Controls Inc
Order No. PD-P736-E