SPECIFICATIONS
MODEL RSS-498-013
CONTRACTOR KIT
Mounting Position:
Mount with the diaphragm in any vertical plane.
Field Adjustable Set Point Range:
1.0 ±0.05" w.c. to 4.0 ± 0.05" w.c.
Factory Set Point for RSS 498-013:
Ships factory set at 1.0" w.c.±0.05" w.c.
Measured Media:
Air or combustion by-products that will not
degrade Polyisoprene and Thermoplastic
Maximum Pressure:
1 psi (0.06 bar)
Operating Temperature Range:
-40 ºF to 190 ºF (-40 ºC to 88 ºC)
Life:
100,000 cycles minimum at 1 psi
maximum pressure each cycle and
at maximum rated electrical load
Electrical Rating:
5 amp noninductive 120 to 277 VAC
1 amp pilot duty (120 Va) at 120 VAC
Contact Arrangement: SPDT
Electrical Connections:
(3) male 90º quick-connect spade terminals,
in compliance with NEMA standards.
Sample Line Connectors:
Barbed fittings will accept ¼" ID or
3
⁄
8
" ID flexible, slip-on tubing.
Approvals: UL, CUL, CSA, CE,
Australian Gas Association.
Shipping Weight:
¼ lb., approx.
Nominal Dimensions in Inches (Millimeters)
CARBON MONOXIDE (CO) GAS EXPOSURE
CAN CAUSE BRAIN DAMAGE OR DEATH
This pressure switch may control air flow into the combustion
chamber. Improper adjustment of the pressure switch in the
field, or use of the switch for an application for which it was not
intended, may introduce carbon monoxide into the ventilation
system or combustion chamber. The U.S. Consumer Product
Safety Commission warns that carbon monoxide gas is an
“invisible killer.” Carbon monoxide (CO) is a colorless, odor-
less, deadly gas produced by burning fuel, including natural
gas and propane. Symptoms of carbon monoxide exposure
include dizziness, headache, nausea, weakness, sleepiness,
muscle twitching, vomiting and inability to think clearly. If you
experience these symptoms, turn the HVAC system off, exit
the building, and get into fresh air immediately. The pressure
switch must be tested thoroughly by an HVAC professional
before the HVAC system is restarted. Proper installation,
operation and maintenance of fuel-burning appliances and
HVAC systems is the most important factor in reducing carbon
monoxide poisoning. For safe operation, be sure all such de-
vices are installed by professionals and operated according to
manufacturer’s instructions and applicable local codes. Have
HVAC systems (including pressure switches) inspected and
serviced annually by a trained service technician. Examine
vents regularly for improper connections, visible cracks, rust
or stains, and blockage.
Install battery-operated carbon monoxide alarms certified to
the requirements of the most recent UL, lAS and CSA stan-
dard for carbon monoxide alarms. Test the alarms regularly
and replace the batteries annually.If you have any questions
regarding the installation, use or safety of this switch, please
call Cleveland Controls Customer Service at
(216) 398-0330.
Fig. 1
: Mount with the diaphragm in any vertical
plane. Sample line connections must not
point upward.
Fig. 2
(left): Duo barbed sample line connectors
located on either side of the diaphragm
accept ¼" ID or ⅜" ID flexible, slip-on
tubing.
Fig. 3
(right): Before pressure is applied to the
diaphragm, the switch contacts are in
the NC position, as shown here.
Fig. 4
:Turns of the set point adjustment screw.
CONTENTS OF KIT CARTON
• (1) RSS-498 switch
• (1) P/N 27577-037 slotted hex
screw, #6 x ⅜"
• (1) P/N 28419 hexagon key, short
arm, 1⁄16"
• (1) P/N 28429 reduction connector,
tube to tube
• (2) P/N 27577-037 switch mounting
screws, slotted hex, #6-⅜"
• (1) Bulletin LT-RSS-498-013-xx
Fig. 1
Fig. 4
Fig. 2
Fig. 3
