Table of Contents
Advertisement
CONNECTING THE UNITS
1.
Connecting the pipework:
a. Remove the flare nuts from the service valves and release the nitrogen holding charge by slowly
opening the valves using a 5mm or 8mm allen key.
b. Ensure the suction line is fully insulated.
c. Place the flare nuts over the incoming pipework and flare the pipe ends.
d. Connect the pipework between the units. Do not leave pipes ends, valves etc open to the
atmosphere. Always use 2 spanners when tightening the flare nuts to avoid twisting the pipes.
Use a small amount of refrigerant oil on the mating surfaces.
EVACUATING
With the valves open, connect a vacuum pump to the service ports on the outdoor unit valves. Evacuate the
interconnecting pipework and indoor unit to 1000 microns (1 Torr) or better. Allow this to be held for a
minimum of 15 minutes.
The installer supplies mains, control and interconnecting cables: equipment must be earthed.
Wiring must be carried out in accordance with local and national codes.
Mains supply cables must be size compatible with the recommended fuse.
Cable clamps for use with stranded cables are supplied in units 30 - 90 and should be used to secure
incoming/outgoing cables. Installers must supply a method of securing solid sheathed cables.
FUSES: The system and its supply/interconnecting wiring must be protected by fuses, preferably High
Rupture Current (HRC) motor rated types (to BS EN60269) or miniature circuit breakers to (BS EN60898) or
local codes having similar time lag characteristics, that allow starting of the compressor yet still afford close
overcurrent protection under running conditions. The ratings below are for HRC motor rated fuses.
1PH FUSE SIZE
DRC+
20
30
FUSE
16
16
3PH FUSE SIZE
DRC+
30
40
FUSE
10
10
ELECTRICAL
40
50
60
80
20
25
25
32
50
60
80
10
10
16
8/11
54208007-06
Advertisement
Table of Contents
