Haier CA0035EAND Service Manual page 29

■ Control of auxiliary electric heater
The electric heater is started to provide the auxiliary heating function under the low temperature. The
water inlet & outlet of the auxiliary electric heater are connected in series to the outlet water main of the
modular air-cooled chiller unit, with control contacts of the auxiliary electric heater provided in the
electrical cabinet of main module of the unit (only 220V output control signal provided, and the control
part of electric heater equipped by users).
■ Operation control of water pump (to ensure normal operation of the unit, linkage control of the water
pump and the unit must be used)
The linkage control contacts of chiller water pump are arranged in the unit control cabinet (only 220V
output control signal provided, and the control part of water pump equipped by users). If the unit is in
standby state, the water pump is not started; if the standby unit is switched to running state, the water
pump is started firstly; if the running unit is switched to standby or shutdown state, after completion of
operation, automatic shutdown of the water pump may delay.
Note: where multiple units share one set of water pipeline system, after the unit is started, all water
pumps (except for standby pumps) are started, and the number of running water pumps is independent
of the number of running units. Selection of water pumps shall be in accordance with requirements of
units: the water flow and the nominal water flow on the nameplate shall not exceed ±30%.
■ End linkage control
The passive normally-open contact (open if the end controller is disabled; and closed if it is enabled) of
the end controller is connected to the linage contact of the main module (LINE, 0V). When the unit is
enabled, if at least one end controller is enabled, the unit automatically starts; if all end controllers are
disabled, automatic shutdown of the unit may delay. If the unit is not provided with end linkage control,
LINE, 0V shall be short-circuited.
2. Electrical parameters
Model of unit
CA0035EAND
CA0070EAND
CA0100EAND
CA0130EAND
Note:
the working voltage of the unit must be kept within ±10% of the rated working voltage. If the power wiring distance
is too long, the power cord diameter shall be increased under the guidance of professional electricians in
accordance with the technical data provided by the cable manufacturer.
Rated current Maximum current
15.8A
34.6A
53.2A
75.4A
Locked-rotor current
27.5A 155A
55A (155x2) A
82.5A (155x3) A
110A (155x4) A
27
Reference cable
sectional area
5×6 mm²
5×10 mm²
4×50mm²+25mm²
4×50mm²+25mm²