Delta 21CK018C24 Instruction Manual page 53

(6) Installation of heating throttle orifice
Put the heating throttle orifice confirmed according to above table onto the valve base A of throttle
orifice.
Notice! Pay attention to specification and installation direction of throttle orifice.
(7) Installation of throttle valve
Its installation is shown in Fig 14:
Flow direction of heating
Notice! In order to ensure normal operation of the unit, never inversely install the
cooling throttle orifice and heating throttle orifice.
Install the throttle valve and throttle orifice according to the above sequence. Meanwhile, the seal
rings shall be installed properly at joints to prevent leakage.
Model
21CK018C24
21CK024C24
21CK036C24
21CK048C24
21CK060C2
(8) Connection pipe and joint of throttle valve
After connection of throttle orifice, throttle vale and liquid pipe joint, connect connection pipe directly
with joint of throttle valve.
2. Connection of Pipeline
(1) Align the flared end of the copper pipe with the center of the thread joint. Manually tighten the
flared end nut.
(2) Use torque spanner to tighten the flared end nut until the spanner clatters (See Fig.15).
Fitting Pipe for
Indoor Unit
Spanner
Fig. 15
Joint
Valve base A
Heating throttle orifice
Flaring Nuts Fitting Pipe
Torque Spanner
throttle orifice
Heating
Fig 13
Cooling throttle orifice
Fig 14
Torque moment
Gas Valve
Liquid Valve
Inner Hexagon
Spanner
Screwdriver
Fig. 16
52
Flow direction of cooling
2 0±5(N·m)
2 0±5(N·m)
2 0±5(N·m)
2 0±5(N·m)
2 0±5(N·m)
One-Way Valve
Valve Cap
Valve Stem