Replacement Pump and Burner
Switch Arm Contacts with
Terminal Panel
SA91-30B
SA91-30P
INSTRUCTION MANUAL
MM-714C
For installation on 5, 5-M, 7B or 7B-M
Switch Assemblies
Electrical Ratings
Models with 5 or 5-M Switch
Pump and Burner Switch Contact Ratings
Voltage Pilot Duty Only
120 VAC
345 VA
240 VAC
Models with 7B or 7B-M Switch
Switch Ratings
Burner Valve
120 VAC
345 VA 0 - 135 ohms @ 24 VAC
240 VAC
Terminal Panel
Switch Arm Contact
WARNING
• Before using this product read and understand instructions.
• Save these instructions for future reference.
• All work must be performed by qualified personnel trained in the proper
application, installation, and maintenance of plumbing, steam, and electrical
equipment and/or systems in accordance with all applicable codes and ordinances.
• To prevent a fire, do not exceed the switch contact rating.
Failure to follow this warning could cause property damage, personal injury or
death.
STEP 1 - Removal and Replacement of Contacts and Terminal Panels
BURNER
SWITCH
LEVER
STOPS
A
C
E
TOWER
TUBE
FITTIN
G
H
U
B
S
WITC
H
H
O
U
S
IN
G
T
E
RMINA
L
CO
NNE
CT
IO
NS
S
WIT
C
H
C
O
V
E
R
P
U
MP
T
E
R
MIN
A
L
P
A
N
E
L
B
U
R
N
E
R
T
E
R
MIN
A
L
P
A
N
E
L
C
O
N
D
U
I
T
C
O
N
N
E
C
T
O
R
N
AM
EPLAT
E
NA
ME
P
L
A
TE
BASE
PLAT
E
B
D
a. Turn power off to boiler and all controls.
Allow boiler to cool to 80˚F (27˚C) and
reduce the pressure to 0 psi (0 bar).
CAUTION
There may be more than one source of power to
the boiler.
b. Remove Switch Assembly, Terminal
Panels and Switch Housing
• Remove two screws (A) and lift off switch
cover.
• Identify terminal connections for rewiring
and then disconnect all wires from terminal
panels.
• Remove conduit connector and wire from
integral fitting hub.
• Remove four hex nuts (B) and carefully lift
switch assembly up and off tower tube.
• Remove two screws (C) and remove
nameplate.
• Loosen and remove four screws (E) that
hold pump and burner terminal panels in
place. Do not remove terminal panels at
this time.
• Reach through nameplate opening and hold
burner switch lever about midway
between upper and lower stops to move
contact arms into correct (upright) position.
With contact arms in upright position, carefully
remove burner terminal panel.
• Reach through nameplate opening and hold
pump switch lever about midway
between upper and lower stops to move
contact arms into correct (upright) position.
With contact arms in upright position, carefully
remove pump terminal panel.
• Loosen four screws (E) and carefully lift
switch housing up off base plate.
2