Honeywell S8910U Installation Instructions And Safety Information page 7

ing hole pattern. Drill new holes as required. Fasten
securely with four No. 6-32 machine or No. 8 sheet metal
screws.
Install selection tab
Four selection tabs are included with the S8910U. See
Tables 1 through 3. Select the correct tab for the system
and separate the tab from the other three tabs. Install the
tab on the module. Be sure the selection tab is properly
positioned and firmly inserted. See Fig. 2. Discard all
unused selection tabs at a remote location so an incorrect
tab cannot be used in the future. Without a selection tab,
the module operates at four-second trial time and one
ignition trial.
MOUNT IN ONE OF THESE POSITIONS
TERMINALS FACING DOWN
TERMINALS FACING LEFT
DO NOT MOUNT
WITH TERMINALS FACING UP
Fig. 1. Module mounting recommendations.
S8910U UNIVERSAL HOT SURFACE IGNITION MODULE
TERMINALS FACING RIGHT
M2647
WARNING
EXPLOSION HAZARD. CAN CAUSE
INJURY OR EQUIPMENT DAMAGE.
Only trained professional gas appliance service
technicians should install and check out the
S8910U and selection tabs. Use only the selection
tab specified in Tables 1 through 3 for the existing
module being replaced. Always remove all unused
selection tabs from the job site and discard them at
a remote location. Improper use of the selection
tabs can result in appliance malfunction.
S8910U
HOT SURFACE
IGNITION CONTROL
Fig. 2. Separating and installing selection tab.
Wire the Module
CAUTION
1. Check the wiring diagram furnished by the
appliance manufacturer, if available, and
compare with Table 4. Carefully follow any
special instructions affecting the general
procedures outlined in this section.
2. Disconnect the power supply before making
wiring connections to prevent electrical shock or
equipment damage.
IMPORTANT
1. All wiring must comply with applicable
electrical codes and ordinances.
2. Hot surface igniter leadwires should not be
allowed to rest against grounded metal
surfaces.
3. A common ground is required for the S8910U
and the main burner. The 24V (GND) terminal
internally grounds one side of the transformer.
Any auxiliary controls or limits must not be in
the grounded leg. In addition, the appliance
should be earth-grounded.
7
SELECTION TAB
M8434
69-0845—2