37
Installation & Service Manual
5
Electrical connections
(continued)
NOTICE
Ground the cable shield at the
connection to the temperature control
only. Do not ground the shielded
cable at the sensor end.
To maintain temperature accuracy,
sensor wires should be 18 AWG two
conductor (18/2). Use shielded wire
if required.
Additional Temperature Controls
High Water Temperature Limit Control
The appliance is equipped with a fixed setting, auto-reset
high water temperature limit control. The temperature
limit control has a fixed limit setting of 200°F (93°C). If
water temperature exceeds the set point, the limit will
break the control circuit and shut down the appliance.
The limit control will only be reset after the water
temperature has cooled below the set point of the limit.
The high water temperature limit control is mounted in the
outlet side of the front header.
Manual Reset High Water Temperature
Limit Control
The appliance may be optionally equipped with a fixed
setting, manual reset high water temperature limit control.
This manual reset temperature limit control has a fixed
limit setting of 230°F (110°C). If water temperature
exceeds this set point, the limit will break the control
circuit and shut down the appliance. The limit control
can only be reset after the water temperature has cooled
below the set point of the limit. Reset of the limit control
is accomplished by pushing the
Red Reset Button
located
on the control.
Figure 5-3 Terminal Strip
TABLE 5C - WIRE GAUGE
REQUIREMENTS FOR
TERMINAL STRIP CONNECTION
Wire Gauge
Max. Allowable Length
12 GA
100 Ft
14 GA
75 Ft
16 GA
50 Ft
18 GA
30 Ft
3. Do not locate temperature sensor wiring near electric
motors.
4. Do not locate temperature sensor wiring near welding
equipment.
5. Make sure good mechanical connections are made
to the sensor, any interconnecting wiring and the
controller.
6. Do not mount sensor with leadwire end pointing up in
an area where condensation can occur.
7. Use shielded wiring to connect the sensor to the
control when the possibility of an electrically noisy
environment exists. Shielded cable is recommended on
all cable runs of more than 25 feet in length.
Summary of Contents for Efficiency-Pac EW 150 -- 300
Page 47: ...47 Notes ...
