Honeywell R7426B User Manual

R7426A,B,C,D TEMPERATURE AND UNIVERSAL INPUT CONTROLLERS
63-2565 10
APPENDIX
Control And Configuration Parameters
The controller includes two groups of settings (I and II) for
control and configuration parameters. These settings are
automatically selected during programming. See Tables 9 and
10.
NOTES:
— For more details on parameters see the
Parameter Programming section.
— Parameter
Ctrltyp
determines the setting:
Ctrltyp
Lo selects setting I.
Ctrltyp
Hi1 and Hi2 select setting II.
Table 9. Control Parameters.
a
Values in brackets are for R7426D models
only.
b
Unless otherwise noted.
c
If
tr
is greater than 120 sec, resolution is 30 sec; if
tr
is less than 120 sec, resolution is 10 sec.
R7426 Parameter
Description
a
Setting I / Setting II
Resolution
a
Unit
a,b
ABCD # Name Low
a
High
a
Default
a
xxxxP.01 W1 I01 main setpoint 32 [0] 130/260 [100] 70/160 [50] 1 [0.5] °F [%]
xxxxP.02 W
lim
I02 limit setpoint (low or high) 40 [0] 130/260 [100] 60/200 [90] 1
xxxxP.03 W
comp
I03 compensation changeover point 20 110 70 1 °F
xxxxP.04 Wi Winter reset -350 +350 0 2 %
xxxxP.05 Su Summer reset -100 [-350]+100 [+350] 0 1 [2]
xxxxP.06 W
cas
Submaster or cascade setpoint Off, 50
[Off, 0]
260 [100] 70 [Off] 1 [0.5] °F [%]
xxxxP.07 R
cas
Cascade reset span adjustment 0 70 [50] 20 [10]
xxxxP.08 Xp1 I01 Throttling range (main control
loop)
1 70 [50] 4 [10]
xxxxP.09 Xp2 I02 Throttling range (cascade or limit
control loop)
1 70 [50] 20 [10]
x x P.10 Xpc Cooling throttling range (sequence
control)
Off, 1 70 6 1 °F
x x P.11 Xph Heating throttling range (sequence
control)
170 12
xxxxP.12
tr1
c
Reset time (main control loop) Off, 20 20 minutes Off 10 (0.5 min) sec
xxxxP.13
tr2
c
Reset time (cascade control loop)
x x P.14 MINPOS Minimum position (damper
actuators)
050 201 %
xxxxP.15 O
start
Mid-range shift start point (O1) -40 [-50] +40 [+50] 0 1 [0.5] °F [%]
x x x P.16 SOFFS Main setpoint offset (standby mode) 0 20 4 / 10 0.1 °F
xxxxP.17 I01Cal Calibration of sensor I01 -40 [-20] +40 [+20] 0 0.1 °F [%]
xxxxP.18 I02Cal Calibration of sensor I02
xxxxP.19 I03Cal Calibration of temperature sensor
I03
x x P.20 RetOffs Return air offset to simulate exhaust
air conditioning
Off, 0 10 Off 0.1 °F
x x P.21 RuntimeO1 Actuator run time (O1) 6 180 60 1 sec
x P.22 RuntimeO3 Actuator run time (O3)
x P.23 RuntimeO2 Actuator run time (O2)
x P.27 td Derivative decay time (P+I+D
control)
160 1
x P.28 vd Derivative amplification (P+I+D
control)
05 0 0.1—

Honeywell R7426B Specifications

General

Brand	Honeywell
Model	R7426B
Category	Controller
Language	English