A.O. Smith CAHP-120C Series, Руководство пользователя

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4.3 Water Circulating Pump Connection
1. You can decide whether a water circulating pump is necessary based on your need.
2. The power supply of controlling wire output of a water circulating pump is rated 220V
1N~60Hz or 230V 1N~50Hz. If a water circulating pump is employed, and its power is 120W
or less than 120W, the connecting wire of the pump on the terminal block can be used as the
power cord of the pump; if its power is more than 120W, the connecting wire should be used
only as the control wire, other than the power supply.
3. The contactor of the pump can be installed either inside or outside of the control box on the
water heater.
4. Water circulating pump connection is illustrated in figure 4.9.
Figure 4.9
4.4 Display Box Installation
1. Important Information
z The display box should not be located in an area where the combustible gas may leak.
Once the gas leaks and remains around the display box, it can result in fire.
z The display box should be located in an area that is free from oil, vapor or sulfur.
Otherwise it can result in product deformation causing fault.
z
The display box should be located in an area that is well ventilated and dry and avoid
storage in direct sunlight.
z
Protect the display box during installation process and keep it away from dust. Do not
touch electrical parts. Otherwise the display box would be damaged.
z
The display box is connected in low voltage circuit, and contact with high voltage circuit
that is rated more than 220V is forbidden. The communication cable of display box
should not in the same conduit with voltage lines, and the distance between conduits
should be 300~500mm or larger.
z The inner diameter of communication cable conduit should be larger than 20mm.
z
Excessive connection or lengthening connection is forbidden in the connecting wire of
the display box.
z Do not check the display box for electrical insulation with a megger after installation.
z
The dimensions of the display box are: 162×122×23 with frame and 146×106×23 without
a frame.
z
If the display box can be installed without running the communication cable through the
conduit, please ignore the following installation process for communication cable. If the
communication cable must be removed from the display box or from the main control
board before being fixed, refer to the following installation process.
2. Communication Cable Connection
A ˖ Outlet Terminal of Pump Controlling
Wire on the Terminal Block
L1 ˖ Terminal of Pump’s Main Power
N ˖ Terminal of Neutral Wire
K
˖
Coil of Contactor
K-1 ˖ Contact of Contactor
M
˖
Water Circulating Pump
S
˖
Temperature Switch (Optional)