
Installation Instructions Y75
Issue Date August 22, 2008
Series Y75 Sensing Probes
for Electronic Ignition Systems
Dimension “A”
Electrode
Protrusion
Length
Dimens ion “B”
Locating
Dimension
Application
Installation
Figure 1: Y75 Sensing Probe
The Y75 sensing probe may be used to replace broken or damaged sensing
probes in electronic ignition control systems.
Table 1: Specifications
Product
Material
Maximum
Temperature
Agency Listings
Specification Standards
Performance specifications are nominal and conform to acceptable industry standards. All agency
certification of BASO products is performed under dry and controlled indoor environmental conditions.
Use of BASO products beyond these conditions is not recommended and may void the warranty.
Product must be protected if exposed to water (dripping, spraying, rain, etc.) or other harsh
environments. The original equipment manufacturer or end user is responsible for the correct
application of BASO products. Consult BASO Gas Products LLC for questionable applications. BASO
Gas Products LLC shall not be liable for damages or product malfunctions resulting from
misapplication or misuse of its products.
Refer to the Y75 Series Sensing Probes Product Bulletin (BASO-PB-Y75) for necessary information on
operating and performance specifications of this product.
!
CAUTION: Turn off the gas to the appliance at the upstream
Y75 Replacement Sensing Probes
Rod: Kanthal D or Hoskin 815
Ceramic: Steatite
Rod:
Ceramic:
CSA Certificate Number 22951-165071
ANSI Z21.20, CAN1-6.4
1,800°F (982°C)
1,000°F (538°C)
manual shutoff valve before installing the Y75 sensing
probe.
!
WARNING: Shock Hazard. To prevent electrical shock or possible
damage to the equipment, disconnect the power
supply.
© 2008 BASO Gas Products 1
Part No. BASO-INS-Y75, Rev. B www.baso.com

Perform the following procedure to install the Y75 sensing probe:
1. Turn off the gas at the upstream manual shutoff and disconnect power
to the appliance.
2. Disconnect the sensing probe cable from the old sensing probe.
3. Remove the old sensing probe from the pilot burner.
4. Check the length of Dimension B (see Figure 1) to ensure the correct
replacement probe is being used.
5. Compare the sensing probe rod protrusion length (Dimension A, see
Figure 1). If required, trim the length of the Y75 rod being installed to
the same length as the sensing rod being replaced.
6. Install the Y75 sensing probe into the pilot burner by applying
2-6 inch-lbs of torque.
7. Restore the power and the gas supply to the appliance.
8. Using a microammeter, check the signal passing through the sensing
probe. Refer to Table 2 for minimum flame sensing currents for
various ignition controls.
9. If the microampere signal is marginal (minimum + 0.1 microamperes),
trim the Y75 sensing probe in increments of 0.125 in. (3.17 mm),
taking care that there is still proper flame impingement on the sensing
probe.
10. Reconnect the sensing probe cable to the new sensing probe. Before
leaving the installation, observe at least three complete operating
cycles to see that all components are functioning correctly.
Table 2: Minimum Current Requirements
Product Number
G60 all models, CSAs (all models except
CSA45A-601R and CSA51A-601R)
G65 all models, G66 all models,
CSA45A-601R, CSA 51A -601R, G600A X,
G600AY, and G670AW
G770 all models,
G600KX, LX, LY, MX, NX, and RX
Minimum Required Flame
Sensing Current in Microamperes
0.7 microamperes DC
0.2 microamperes DC
0.15 microamperes DC
Table 3: Replacement Guide
Sensing Dimensions
Probe Description A
Y75AS-1
Y75AS-2
Y75BS-1
90° Terminal Connector
Replaces Y75AA
Straight Terminal Connector
Replaces Y75AA
Straight Terminal Connector
Replaces Y75BA
(1.40 in.) 35.56 mm (0.34 in.) 8.63 mm
(1.40 in.) 35.56 mm (0.34 in.) 8.63 mm
(1.40 in.) 35.56 mm (0.57 in.) 14.47 mm
B
1007 South 12th Street
PO Box 170
Watertown WI 53094 www.baso.com
1-877-227-6427 (1-877-BASOGAS) Printed in U.S.A.
2 Series Y75 Replacement Sensing Probe for Electronic Ignition Systems Installation Instruction