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11 ContRoLLeR seeMs to oPeR-
Ate IMPRoPeRLY
➔ If the controller is suspected of operating im-
properly, it may be checked further as follows.
CAUtIon
Please note the following to avoid damage:
– Disconnect all power to the controller!
– Fault-clearance must only be undertaken by
authorized trained personnel.
1 Loosen the cover screw and remove the cover.
2 Connect an ohmmeter between the switch termi-
nals.
Setpoint
decrease
R
W
B
W
B
R
3 Lower the setpoint of the controller (simulating a
pressure increase) through a range greater than
the differential. The switch should either make or
break, depending on the model of the controller.
See the switch action in page 2 (5 Technical
data).
➔ If it makes, the ohmmeter will read zero; if it
breaks, the ohmmeter will read infinity.
4 Raise the setpoint of the controller (simulating a
pressure decrease) through a range greater than
the differential. The switch should break or make,
just the opposite of the result before.
12 CHeCKoUt
➔ After the controller has been installed, wired and
adjusted, it should be tested with the system in
operation.
1 First, allow the system to stabilize.
2 Then, observe the operation of the controller
while raising and lowering its setpoint.
FoR MoRe InFoRMAtIon
The Honeywell Thermal Solutions family of products includes
Honeywell Combustion Safety, Eclipse, Exothermics, Hauck,
Kromschröder and Maxon. To learn more about our products, visit
ThermalSolutions.honeywell.com or contact your Honeywell Sales
Engineer.
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Honeywell Thermal Solutions (HTS)
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ThermalSolutions.honeywell.com
➔ Pressure should increase when the setpoint
is raised and decrease when the setpoint is
lowered.
3 Also, check the make and break points of the
controller.
➔ If they do not agree with a separate, accurately
calibrated pressure gauge, a slight adjustment of
the scaleplate(s) may be necessary.
➔ Use accurate pressure testing equipment when
checking out the controller.
➔ Use a separate, calibrated pressure gauge to
verify that the final pressure setpoint is within 5%
of the desired value.
13 CeRtIFICAtIon
13.1 UL listed
Underwriters Laboratories Inc. listed: File No.
MP466, vol. 10, Guide No. MBPR.
13.2 CsA approved
Canadian Standards Association (CSA): File No.
LR1620, Guide No. 400E-0
14 DIsPosAL
Devices with electronic components:
Weee Directive 2012/19/eU – Waste electrical
and electronic equipment Directive
At the end of the product life (number of operat-
ing cycles reached), dispose of the packaging and
product in a corresponding recycling centre. Do not
dispose of the unit with the usual domestic refuse.
Do not burn the product.
On request, old units may be returned carriage paid
to the manufacturer in accordance with the relevant
waste legislation requirements.
© 2023 Honeywell International Inc.
EN-6
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