INSTALLATION DATA
5500 M SERIES INFINITE SWITCH KIT
The Robertshaw
®
5500 M series is a voltage sensing (parallel circuit) infinite
switch designed to replace the current VSI (INF) switch.
The Robertshaw® M Series Infinite Switch is a rotary switch which controls
the power dissipated by a heating element. It is used on electric ranges, hot
plates, warming drawers and zones, barbecue grills, space heaters, quartz
heaters and many applications which call for proportionate control of a
resistive load.
The residential model has the exclusive universal design of the square
break-off shaft. Included with these kits are the shaft adaptors that allow
the service person to use the customer’s original dial on the replacement
switch. The shaft can be broken off to the required length to adapt to
numerous OEM applications.
The commercial model differs only in that it has a heavy-duty dial shaft
(requiring no dial shaft adaptors).
Specifications:
UL Approved #E112536
15 Amps @ 120/240 Volt 50/60 Hz for 200°F (93°C) ambient
13 Amp rating for all temperatures up to maximum ambient of 257°F
(125°C)
Options:
Push-to-Turn or Non-Push-to-Turn
Clockwise or Counterclockwise shaft rotation from OFF
Key Features:
Controllable range of output power with Lo and Hi detents
Compact and lightweight design
PANEL
ì VENTS UPî
FLATHEAD
SCREWS
Figure 3
Figure 5
Figure 1
INSTALLATION INSTRUCTIONS
CAUTION: This device should be installed by a qualified service technician
with due regard for safety, as improper installation could result in a
hazardous condition.
1. Unplug range or disconnect power.
2. Remove dial from switch.
3. Gain access to the inoperative switch. Refer to the original user manual
for the appliance for proper disassembly.
4. Label all wires with tags or make an exact drawing of wiring
configuration before removing any wires.
5. Remove original switch.
6. Determine mounting type for the new switch: Screw Mount or Palnut.
Note: The 5500 M must be mounted with the slotted vents at the top.
Screw mount (Figure 1) is the most common. Attach the new switch to
the rear panel with the original screws or using the two flathead screws
supplied in the kit.
Palnut mount (Figure 2) requires adding the bushing and the bracket
before inserting the shaft through the rear panel. Use the two smaller
Phillips head screws to attached bracket vertically or horizontally to
the new switch. Secure the switch (finger snug) to the rear panel with
the palnut.
7. Temporarily mount the switch and place the original dial on the new
switch shaft using one or more of the adaptors
on the sprue tree (Figure 3). Make sure the
shaft goes in all the way. See Figure 4 for
assembly of spring clip to adaptor if applicable.
8. Measure distance from back of dial to the front
of the panel and subtract an 1/8”. This becomes your measurement
needed in the next step.
Figure 4
RESIDENTIAL MODEL
COMMERCIAL MODEL
PANEL
BUSHING
PALNUT
PHILLIPS
HEAD SCREWS
BRACKET
(MOUNT VERTICALLY
OR HORIZONTALLY)
VENTS UP
Figure 2
9. Remove the switch. Use the measurement from previous step and
measuring from the end of the shaft mark the shaft at the nearest
break-off point (or at the next break-off groove toward the end of the
shaft to avoid breaking off too short).
Note: If the control is push-to-turn and the shaft is broken off too short
it will not allow the dial to detent as needed for proper operation. The
control will need to be replaced as replacement shafts are not available.
10. To break off the shaft: Use two (2) pairs of pliers – one on each side of
the marked groove (Figure 5). Hold pliers firmly and break shaft. DO
NOT HOLD SWITCH BODY.
11. Remount switch, then proceed to wiring instructions.