Carrier X-POWER Series Service Manual page 90

R410a DC Inverter 60Hz Carrier service manual
Note: It is no need to insulate the drainpipe if you choose the plastic pipe as drainpipe.
1.2.6 Electric wiring
1.2.6.1 Please select power supply for indoor unit and outdoor unit separately. Both indoor units and
outdoor units should be grounded well.
1.2.6.2 The power supply should have specified branch circuit with leakage protector and manual switch.
1.2.6.3 Please put the connective wiring system between indoor unit and outdoor unit with refrigerant
piping system together.
1.2.6.4 Power wiring should be done by professional electrician and complied with relevant National
Electric Standard.
1.2.6.5 The power supply, leakage protector and manual switch of all the indoor units connecting to the
same outdoor unit should be universal. (Please set all the indoor unit power supply of one system into
the same circuit.)
1.2.6.6 It is suggested to use 3-core shielded wire as signal wire between indoor and outdoor units,
multi-core wire is unavailable. Pay attention to the consistency. When signal wire parallel to the power
wire, please keep enough distance (about 300mm at least) to prevent interference.
1.2.6.7 The power wire and signal wire can't be enlaced together.
1.2.7 Lay the indoor pipeline
Note: Collocate the air-outlet reasonably to prevent airflow short-circuit. Check the static pressure
whether in the allowable range. The air filters should be easy to unpick and wash. Do pressure test on
pipeline.
1.2.8 Heat-insulation procedure
Pressure test Heat-insulation work
Check the heat-insulated part
Refrigerant pipe work
Note: For welding part, flare part and branch pipe, heat-insulation work must be done after finished the
pressure test.
1.2.9 Install outdoor unit
Note: 1. Gutter must be set around the foundation to drain the condensation water.
2. When installing outdoor units at the roof, please check the strength of the roof and pay
attention not to destroy the waterproof of the roof.
1.2.10 Recharge refrigerant procedure
Calculate the added volume according to liquid pipe length Recharge refrigerant
Note: Please calculate the additional amount of refrigerant according to the formula that we supply to
you, and the calculation result must be correct
1.2.11 Main points of test running and Commissioning
Please check the following issues before turning on the power:
-5
1.2.11.1 Vacuum dry: Make sure the vacuum degree accord with our requirement about 10 .
1.2.11.2 Wiring: Includes the power wiring and communication wiring; Recheck the connection according
to our corresponding wire diagrams. Especially, please remember our communication wire is polar; it
means you must connect the communication wire correspondingly to the terminal block.
1.2.11.3 Additional charge of refrigerant: Recheck the calculation formula and recalculate the total
recharge volume according to our supplied formula.
1.2.11.4 Open the stop-valve of gas and liquid pipe with Allen key; Check leakage of stop-valve with
soap water. Please confirm whether the outdoor unit has been connected to the power for 12hr before
start test running.
Test running: Turn on all of the indoor units with cooling mode and set the temperature in 17degree with
108 Installation