Ouellet UHD18KCH25S - Page 32

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Step 4: Connect indoor and outdoor pipes
• Remove the screw on the right handle of outdoor unit and then remove the handle.
screw
handle
• Remove the valve cap and align the pipe joint on the flared orifice of the pipe.
liquid pipe
gas pipe
liquid
valve
gas valve
• Pre-tighten the union nut by hand.
pipe joint
union nut
• Tighten the union nut with torque wrench by referring to the sheet below.
Hex nut diameter
Tightening torque
(N-m)
Φ 6 15~20
Φ 9.52 30~40
Φ 12 45~55
Φ 16 60~65
Φ 19 70~75