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MOUNTING AND WIRING
Do not use on circuits exceeding specified
voltage. Higher voltage will damage control
and could cause shock or fire hazard.
To prevent electrical shock and/or equipment
damage, disconnect electric power to system at
main fuse or circuit breaker box until installation
is complete. Failure to earth ground the appli-
ance or reversing the neutral and hot wire con-
nection to the line can cause shock hazard.
Shut off main gas to heating system until instal-
lation is complete.
Route and secure all wiring as far from flame
as practical to prevent fire and/or equipment
damage.
To prevent damage to the transformer, system
components or wiring harness, take care when
drilling new mounting holes. Failure to do so may
result in electrical shock, fire hazard or equip-
ment damage.
INSTALLATION
All wiring should be installed according to local and
national electrical codes and ordinances.
The control must be secured to an area that will experi-
ence a minimum of vibration and remain below the maxi-
mum ambient temperature rating of 175°F. The control is
approved for minimum ambient temperatures of -40°F.
When mounting the control, any orientation is acceptable.
Choose a location that will not damage, obstruct or place
stress on the control’s terminations, system wiring har-
ness or system components. After finding a suitable
location, drill four (4)
1
⁄
8
” holes for mounting control. To
ensure proper mounting hole locations, there is a mount-
ing hole template on page 8 of this instruction sheet.
Detach the page with the template from the instruction
sheet and apply it to the mounting location. When drilling
the holes, take care so that the transformer, wiring har-
ness or other system components are not damaged. Four
(4) #8 sheet metal screws are provided to complete the
installation.
Refer to the wiring diagram and wiring table when con-
necting the 50A55 control to other components of the
system.
UL approved, 105°C rated 18 gauge, stranded,
2
⁄64” thick
insulation wire is recommended for all low voltage safety
circuit connections. Refer to 50A55 specification sheet
for recommended terminals to mate with those on the
control.
UL approved 105°C rated 16 gauge min., stranded,
4
⁄64”
thick insulation wire is recommended for all line voltage
connections. Refer to 50A55 specification sheet for rec-
ommended terminals to mate with those on the control.
After installation or replacement, follow appliance
manufacturer’s recommended installation or service in-
structions to ensure proper operation.
The 50A55 has only one serviceable part–an automotive
type fuse, which protects the low voltage transformer from
damage if its output is short-circuited. If the fuse has
opened up, remove whatever caused the short circuit and
replace the fuse with only a 3 Amp automotive type fuse.
If the fuse is not the cause of the control’s problem,
replace the entire 50A55 control. There are no other user
serviceable parts.
WARNING
!
CAUTION
!
NOTE