Daikin VRV III-S Technical Data Manual

Also see for VRV - WII: Service manual Technical data Manual Technical data

Contents

•• VRV Systems • Network Solution30336 System Architecture6 - 2 Confirmation of Watthour MeterFor distribution of electric energy, the integrating watthour meter with pulse transmitter is required.It is important to confirm that the specifications coincide with each other, and also to confirm with the division in charge (normally, electrical workdivision, not air-conditioning div.).6 - 2 - 1 Specifications of watthour meter to be connected to intelligent Manager1) To be an integrating watthour meter with pulse transmitter.2) The output pulse unit (pulse weight) is to be 1 pulse to 1kWh (1Wh/pulse).3) The pulse width is to be within 40 to 400 msec.4) The mercury relay is to be used for pulse output, and it to be no-voltage output.5) If even any of the mechanical or electrical type conforms to the above “1)” to “4)”, it can be used.If the specifications are not coincident, there is a possibility that the following imperfections are caused:• If the output pulse unit is not 1kWh/pulse.It results a large difference between the reading (value) of watthour meter and the total value of distribution of electric energy.For the charge calculation, the number of pulse input is counted and the power consumption of the outdoor unit is monitored, therefore, forexample, if the large value, 10 kWh/pulse, is inputted, the electric energy calculated is the value of one tenth (1/10) times.• If the pulse width is not within 40 to 400 msec. If it is less than 40 msec., the pulse input cannot be detected, and the result of calculation is smallerthan the real value. In addition, if more than 400 msec., more than 2 pulses is detected for 1-pulse input, and the result of calculation is larger thanthe real value.• If use of contact other than mercury relay.If it is a general relay, the pulse may not accurately be detected due to relay chattering.Confirm the following items for the construction process.• Construction of pulse signal line is kept away from power cables. For this pulse signal line, the voltage DC24V should be applied from the intelligentManager side. It should be constructed separating from the power cables.• Max. distance to be 200 m. Confirm that the distance with the watthour meter~intelligent Manager is within 200 m.