Watlow Mercury Relay or MDR Retrofit - Manual (Page 10)

2.62
(67)
Pressure
Connector
"A"
2.18
(55)
1.88
(48)
(5)
.20 Dia.
Mtg Hole
2.13
(54)
2.50
(64)
1 Pole
(7)
.27 Dia.
Mtg. Hole
5.70
(145)
4.70
(119)
2.79
(71)
.27
(7)
Wide Mtg.
Slot
40 °
Typ.
3.25
(83)
3.78
(96)
"A"
Pressure
Connector
2 Pole
(7)
.27 Dia.
Mtg. Hole
(7)
.27 Dia.
Mtg. Slot
40 °
Typ.
5.70
(145)
2.79
(71)
4.70
(119) 5.00
(127)
Pressure
Connector
"A"
3.78
(96)
3 Pole
All 80, 100, and 150 Amp Models
Dimensions
Watlow Series HG Mercury Displacement Relay User’s Manual 3
1 Pole Wiring Example
2 Pole Wiring Example
3 Pole Wiring Example
Wiring
120V~(ac) Fuse
Fuse
1 Pole
120V~(ac)
Coil
Control
Heater
L2
Neutral
L1
Control
Fuse Fuse
Fuse
Heater
2 Pole
240V~(ac)
Single
Phase
L1
L2
240V~(ac)
Single
Phase
}
Fuse
Fuses Fuse
3 Pole
120V~(ac)
Coil
Control
N
3-Phase
Wye Heater
208V~ (ac)
3 Phase
Wye
L1
L2
L3
{
“A” Pressure
Dimensions Connectors:
HG80-XABX-0000 5.77 (147) #1-8 A.W.G.
HG1M-XACX-0000 5.77 (147) #1-8 A.W.G.
HG2M-XADX-0000 6.40 (163) #1/0 - #2 A.W.G.
∑ ∑
WARNING: Wiring must conform to
National Electric Code (NEC) safety
standards, as well as locally applicable
codes. Failure to do so could result in
personal injury or death. See page 6 for
fusing recommendations.
з з
Use copper conductors only.