WIRING
fIeld wIrIng MusT be raTed 90°c MInIMuM. for aMbIenT
TeMperaTures below -10°c, use suITable fIeld wIrIng.
dIsconnecT all supply cIrcuITs before wIrIng unIT.
wIre unITs accordIng To naTIonal and local elec-
TrIcal codes. MaxIMuM recoMMended wIre sIze Is
14 awg. The recoMMended TIghTenIng Torque for fIeld wIrIng
TerMInals Is 7 To 17 In-lbs.
elecTrIcal raTIngs sTaTed In lITeraTure and on naMeplaTes
MusT noT be exceeded—overload on a swITch can cause
faIlure on The fIrsT cycle.
To prevenT seIzure of enclosure cover, do noT reMove
lubrIcanT. Threads should also be free of dIrT, eTc.
The exTernal groundIng TerMInal Is noT To be used as
The prIMary equIpMenT groundIng TerMInal. The InTernal
groundIng TerMInal shall be used as The prIMary equIp-
MenT groundIng Means and The exTernal groundIng TerMInal
Is only for a suppleMenTal (secondary) groundIng connecTIon
where local auThorITIes perMIT or requIre such a connecTIon.
remove cover and wire control according to product configuration (see
figure 4). wire directly to the terminal block. an internal grounding terminal
is located near the right-hand conduit opening. replace cover and hand
tighten to fully engage cover o-ring.
ORN
YEL
RED
TYPES B122, E122, E122P
BLU
VLT
BLK
NOTE
REVERSE
WIRING OF
LOW SWITCH
N.C.
N.O.
COM.
N.C.
N.O.
COM.
2SPDT
N.C.
N.O.
COM.
Plunger
TYPES B121, C120, E121, F120, 820E
SPDT
N.C.1
N.C.2
N.O.1
N.O.2
COM. 1
COM. 2
Plunger
RED
YEL.
ORN.
OPTION 1010, 1190, 1195
(FOR TYPE B121, C120, E121, F120 ONLY)
DPDT
N.C.
N.O.
COM.
N.C.
N.O.
COM.
TYPE 822E
#1
#2
NC NO COM NC NO COM
SWT#2
SWT#1
BLK BLU VLT RED ORN YEL
Breather Drain Option M450: Types C120, F120
Mount with breather drain facing down (see figure 1). The conduit connec-
tion must be properly sealed (potted) for this type of installation.
Breather Drain Option M450: Types B121, B122, E121 & E122, E122P
Mount in vertical position with temperature assembly and breather drain fac-
ing down (see figure 2).
820E and 822E
type units must be surface mounted. drill mounting holes
per figure 3.
If a seal fitting is required, install the nipple and the seal fitting prior to sur-
face mounting the controller.
Mounting Bulb and Capillary
fully immerse the bulb and 6” of capillary in the control zone. for best con-
trol it is generally desirable to place the bulb close to the heating or cooling
source in order to sense temperature fluctuations quickly. be sure to locate
the bulb so it will not be exposed to temperature beyond the instruments
range limits.
avoid bending or coiling the capillary tube tighter than 1/2” radius. exercise
caution when making bends near the capillary ends.
If a separable well or union connector is used follow separate instructions
included with them.
Figure 2: Types B121,
B122, E121, E122, E122P
F
igure 3: 820E, 822E Mounting
clearance for 1/4 screw (4) places
Figure 4
use 90°c copper conductors only.
recommended tightening torque for
field wiring terminals is 7-17 in-lbs.
Figure 1: Types C120, F120
