Installation and Commissioning Guide
Variable Capacity Commercial
17
Installation and Commissioning Guide - Split Ducted Variable Capacity Commercial Outdoor Unit
Doc. No.0525-066 Ver. 6 221012
NITRO
REGULATOR
SET TO 2 L/S
N
I
T
R
O
G
E
N
LIQUID
PIPE
A
BRAZE JOINTS
GAS PIPE
DETAIL A
OPEN PIPE
Rubber bung
into pipe opening
to create seal
Installing interconnecting pipe work to indoor, nitrogen bleed procedure (First fi t or rough in stage only)
1. Run interconnecting pipe work from condenser location to evaporator.
2. Release pressure in evaporator and remove caps.
3. Fit copper tube into tail, set nitro bottle and regulator up at condenser end of pipe work.
4. Fit nitrogen line into liquid line with rubber bung to seal the connection. The seal will prevent air being sucked into
pipe work.
5. Leave suction line open, set nitro regulator for nitrogen to fl ow through pipe work at 2 l/s fl ow rate @20kPa.
6. Braze required joints as quick as possible. See Diagram Above.
Installing interconnecting pipe work to outdoor, nitrogen bleed procedure (First fi t or rough in stage only)
1. Starting with circuit 1 system, remove piping caps from the condenser and fi t pipe work into tails.
2. Fit nitro hose onto suction ball valve and fi t open hose onto liquid line post valve.
3. Set nitrogen regulator to 2 l/s fl ow rate through pipe work and evaporator.
4. Braze remaining joints as quick as possible.
5. Allow the brazed joints to cool and conduct leak test in the connections.
