118. V2
119. Lay the piping from the indoor unit to the outdoor unit along the piping route as determined
120. Cut the piping in-line with the refrigerant piping connection of the outdoor unit
121. As shown in video also used 2 torque wrenches to tighten the outdoor unit side flare knot
122. If you do not have torque wrenches you may used normal wrenches
123. The works sequences for the left side piping differ from what we have learned from the right side piping
124. However the work itself isn’t any different, so we will only go over the key points
125. First, to obtain the piping length – measure the distance of the piping route from the piping connection position mark on the indoor unit mounting plate to the outdoor unit
126. Cut the piping roughly 30 cm. longer and the length you have just obtain
127. Remove the indoor and outdoor unit flare knot and protect the piping in switch tape
128. Run the piping thru the true hole from outside to inside
129. Confirm the piping in position on the mounting plate
130. Cut the piping according to the mark on the mounting plate
131. Remove the burst on the cut surface and conduct the flare
132. Move the drain piping from the right side to the left side
133. Wrap the drain piping and control wiring securing them at appropriate in tools with vinyl tape
134. Lift the indoor unit up and run the control wiring and drain piping thru the true hole
135. Be sure to place the drain piping on the bottom to allow the drain water to flow smoothly
136. Hook only the upper portion of the indoor unit on to the upper portion on the mounting plate
137. Work will need to be done late on the bottom portion, so do not secure the indoor unit at this time
138. Remove the front panel and lift the indoor unit so that it is easy to connect the piping
139. Tight in the indoor unit side flare knot
140. Conduct the flaring while following the previously mentioned point for flaring
141. Tighten the outdoor unit side flare knot
142. Vacuum drying
143. As air remain in the indoor unit and piping it is necessary to conduct vacuum drying to remove it
144. Use a vacuum pump and gage manifold for vacuum dry
145. Connect the blue charging host to the low pressure side port of the gage manifold and the yellow charging host to the port in the middle
146. Remove the service port cap and attached the charging valve to the service port
147. Connect the blue charging host from the gage manifold to the charging valve attached to the service port
148. Connect the yellow charging host from the gage manifold to the vacuum pump
149. Checks all the valve from the gage manifold are completely closed and then turn on the vacuum pump
150. Fully opening the low pressure valve in this stage discharge the air from the indoor unit and piping
151. If you look at the low pressure gauge, it will show the pressure dropping as the air is it change until a vacuum stage is achieve
152. As the air in the piping contain humanity or another word ‘whiter’ it is necessary to keep running